Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Utilizing electromechanical transducer

Subclass of:

333 - Wave transmission lines and networks

333001000 - PLURAL CHANNEL SYSTEMS

333100000 - Having branched circuits

333132000 - For providing frequency separation

Patent class list (only not empty are listed)

Deeper subclasses:

Entries
DocumentTitleDate
20110175688ELASTIC WAVE DUPLEXER - A transmission elastic wave filter element and a reception elastic wave filter element each flip-chip mounted to a principal surface of a substrate are sealed off by a sealing member. The sealing member includes a base portion in contact with the principal surface of the substrate and made of a first dielectric material, and a lower dielectric-constant portion made of a second dielectric material having a dielectric constant lower than that of the first dielectric material and arranged in at least one of a region of the sealing member that faces the transmission elastic wave filter element on a side opposite from the substrate with respect to the transmission elastic wave filter element, and a region of the sealing member that faces the reception elastic wave filter element on the side opposite from the substrate with respect to the reception elastic wave filter element.07-21-2011
20130027153BULK ACOUSTIC WAVE RESONATOR AND DUPLEXER USING BULK ACOUSTIC WAVE RESONATOR - A bulk acoustic wave resonator (BAWR) includes a bulk acoustic resonance unit and at least one compensation layer. The bulk acoustic resonance unit includes a first electrode, a second electrode, and a piezoelectric layer disposed between the first electrode and the second electrode. The first electrode, the second electrode, and the piezoelectric layer each include a material that modifies a resonance frequency based on a temperature, and the at least one compensation layer includes a material that adjusts the resonance frequency modified based on the temperature in a direction opposite to a direction of the modification.01-31-2013
20100156554ANTENNA DUPLEXER, AND RF MODULE AND COMMUNICATION APPARATUS USING THE SAME - One of plurality of transmission terminals connected to a transmission filter and a receiving terminal connected to a receiving filter is a balanced type terminal, and another is an unbalanced type terminal. The transmission filter and the receiving filter includes surface acoustic wave resonators or film bulk acoustic resonators. The balanced type terminal is connected to a longitudinal mode coupled surface acoustic wave filter.06-24-2010
20100164647ACOUSTIC WAVE FILTER DEVICE - An acoustic wave filter device including a balanced-unbalanced conversion function in which balancing between signals transmitted to first and second balanced terminals is improved includes a longitudinally-coupled resonator type acoustic wave filter unit including an unbalanced end and first and second balanced ends and an acoustic wave resonator. First and second divided electrode sections included in an IDT are respectively connected to first and second signal lines which are connected to the first and second balanced ends of the acoustic wave filter unit. A length of a line which connects the first divided electrode section to the first balanced end is equal or substantially equal to a length of a line which connects the second divided electrode section to the second balanced end, and the first divided electrode section is different from the second divided electrode section.07-01-2010
20100141353PIEZOELECTRIC THIN FILM RESONATOR, FILTER USING THE RESONATOR, DUPLEXER USING THE FILTER, AND COMMUNICATION EQUIPMENT USING THE FILTER OR THE DUPLEXER - There is provided a piezoelectric thin film resonator that decreases only transverse mode waves selectively while maintaining resonance characteristics due to original thickness longitudinal vibration. The piezoelectric thin film resonator includes: a piezoelectric film (06-10-2010
20100148888FILTER, DUPLEXER AND COMMUNICATION APPARATUS - The filter includes a series arm piezoelectric thin film resonator placed in the series arm and a parallel arm piezoelectric thin film resonator placed in the parallel arm. Each of the series arm piezoelectric thin film resonator and the parallel arm piezoelectric thin film resonator includes a substrate (06-17-2010
20130043961DUPLEXER WITH SHIELDING BONDWIRES BETWEEN FILTERS - A duplexer includes first and second filters, and a first shielding bondwire. The first filter includes a first bondwire connecting the first filter to a printed circuit board, the first bondwire forming a portion of a first virtual loop having a first virtual area, where first current passing through the first bondwire generates a first magnetic field. The second filter includes a second bondwire connecting the second filter to the printed circuit, the second bondwire forming a portion of a second virtual loop having a second virtual area. The first shielding bondwire includes first and second ends connected to a conductor of the printed circuit board to form a closed electrical first shielding loop having a corresponding first shielding area. The magnetic field induces shielding current in the first shielding loop, which generates a first compensating magnetic field that attenuates the first magnetic field.02-21-2013
20130033337ACOUSTIC WAVE FILTER - An acoustic wave filter including piezoelectric thin film resonators, in which at least two of the piezoelectric thin film resonators including: a substrate; a piezoelectric film located on the substrate; a lower electrode and an upper electrode located across at least a part of the piezoelectric film; a mass load film for a frequency control located in a resonance region where the lower electrode and the upper electrode face each other, and having a shape different from that of the resonance region; and a temperature compensation film having a temperature coefficient of an elastic constant opposite in sign to that of the piezoelectric film, at least a part of the temperature compensation film being located between the lower electrode and the upper electrode in the resonance region, and areas of mass load films of said at least two of the piezoelectric thin film resonators are different from each other.02-07-2013
20130038406CIRCUIT MODULE - A circuit module includes a duplexer and a circuit substrate. A first signal path connects a first external electrode to a second external electrode. A second signal path connects a third external electrode to a fourth external electrode. A third signal path connects a fifth external electrode to a sixth external electrode. A first ground path connects a seventh external electrode to an eighth external electrode. A second ground path is connected to a ninth external electrode and is capacitively coupled to the second signal path.02-14-2013
20130038405ACOUSTIC WAVE DEVICE - An acoustic wave device includes: a substrate; a lower electrode formed on the substrate; at least two piezoelectric films formed on the lower electrode; an insulating film located between the at least two piezoelectric films; and an upper electrode formed on the at least two piezoelectric films, wherein an outer periphery of an uppermost piezoelectric film out of the at least two piezoelectric films in a region in which the lower electrode and the upper electrode face each other is positioned further in than an outer periphery of the upper electrode.02-14-2013
20100109802BRANCHING FILTER - A branching filter includes an antenna terminal, a transmission signal terminal, a reception signal terminal, a transmission filter element, and a reception filter element. At least one of the transmission filter element and the reception filter element includes a longitudinally coupled resonator filter element having first and second IDT electrodes arranged along a direction of propagation of an elastic wave. The first IDT electrode includes a first end connected to the antenna terminal. The second IDT electrode includes a first end connected to one of the transmission signal terminal and the reception signal terminal. The longitudinally coupled resonator filter element further includes an inductor connected in series between a second end of the first IDT electrode and a ground potential.05-06-2010
20100109801ACOUSTIC WAVE FILTER, DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS - In an acoustic wave filter, a notch resonator is connected in series (or parallel) with a plurality of acoustic wave resonators connected in a ladder shape. The notch resonator has a main resonant frequency that is substantially equal to a sub-resonant frequency of the acoustic wave resonators. With this configuration, the occurrence of sub-resonant responses in filter characteristics can be suppressed, resulting in an improvement in communication characteristics.05-06-2010
20130049882COMMUNICATION MODULE - A communication module includes a plurality of duplexers, wherein at least either IDT electrodes of transmit filters of at least two of the plurality of duplexers having a different transmit band or IDT electrodes of receive filters of at least two of the plurality of duplexers having a different receive band are composed of a same material, have a same thickness and are provided on a single piezoelectric substrate.02-28-2013
20090309673BRANCHING FILTER AND METHOD FOR MANUFACTURING THE SAME - A branching filter that is capable of being reduced in size, particularly in height, has a configuration in which a transmitting filter chip and a receiving filter chip include a first piezoelectric substrate and a second piezoelectric substrate, respectively, and are spaced from each other. The transmitting filter chip includes a first insulating layer which extends over an IDT or which is disposed above the IDT. The receiving filter chip includes a first insulating layer which extends over an IDT or which is disposed above the IDT. The upper surfaces of the transmitting and receiving filter chips and are covered with a second insulating layer. External terminals arranged on the upper surface of a third insulating layer are electrically connected to the IDTs and through conductors and extending through the first insulating layers and the second insulating layer and the conductors, and include plating films.12-17-2009
20130088305LADDER ACOUSTIC WAVE FILTER DEVICE AND BRANCHING FILTER - A ladder acoustic wave filter device is constructed such that ripples in the pass band are suppressed, and insertion loss is small in both of a high frequency side portion and a low frequency side portion of the pass band. Apodization weighting is applied to a series-arm-side IDT electrode. Busbars of the series-arm-side IDT electrode are configured so that in an acoustic wave propagation direction, a distance in an overlap width direction between the busbars becomes shorter as the overlap width of electrode fingers becomes smaller. Each of a pair of comb-shaped electrodes of a parallel-arm-side IDT electrode further includes a plurality of dummy electrodes that extend from a busbar and are opposed to electrode fingers of the other comb-shaped electrode in the overlap width direction. The parallel-arm-side IDT electrode is a normal IDT electrode in which the overlap width is constant.04-11-2013
20090302970DUPLEXER - A duplexer includes a substrate including an insulation layer, an upper interconnection layer provided on an upper surface of the insulation layer, a lower interconnection layer provided on a lower surface of the insulation layer, and an inner interconnection layer provided in the insulation layer, the inner interconnection layer including an inner ground pad, at least one acoustic wave filter chip mounted on an upper surface of the substrate, signal pads provided on the upper interconnection layer and connected to signal electrodes of the at least one acoustic wave filter chip, and an upper ground pad that is provided in the upper interconnection layer so as to be located between the signal pads and is connected to a ground electrode of the at least one acoustic wave filter, wherein D12-10-2009
20120218052ANTENNA SHARING DEVICE - Antenna duplexer (08-30-2012
20090039979MICRO-ELECTROMECHANICAL DEVICE - Provided is a micro-electromechanical device capable of processing an electric signal in the high frequency region by a simple device structure. The micro-electromechanical device is formed, including an oscillator element having a plurality of electrodes disposed on a substrate and a beam facing the electrodes to oscillate by electrostatic drive. An input/output of a high frequency signal is applied to one of the combinations of the electrodes and the beam.02-12-2009
20090009263Duplexer - A duplexer includes an antenna terminal, a transmit filter, and a receive filter. The receive filter includes a first sub-filter that includes one or more resonators, and a second sub-filter including a double mode surface acoustic wave (DMS) filter. The second sub-filter is downstream of the first sub-filter relative to the antenna.01-08-2009
20090009262Electrical circuit and component with said circuit - An electrical circuit that includes an electric four-terminal network is disclosed. The electric four-terminal network includes a first electrical port with a first terminal and a second terminal and a second electrical port with a first terminal and a second terminal. The electrical circuit also includes a first shunt branch between the second terminal of first electrical port and ground.01-08-2009
20120235767BRANCHING FILTER - A branching filter includes a longitudinally-coupled-resonator-type elastic wave filter having a balanced-unbalanced transformation function and the branching filter has excellent balance characteristics and a small size. The branching filter includes a ladder elastic wave filter chip and a longitudinally-coupled-resonator-type elastic wave filter chip. An antenna back-surface electrode and an antenna electrode pad are connected to each other via a first wiring provided in a wiring substrate. The antenna electrode pad and a longitudinally-coupled-resonator-type elastic wave filter are connected to each other via a second wiring provided on a piezoelectric substrate. The second wiring extends in a first direction and a first functional electrode and a second functional electrode provided on the piezoelectric substrate are axisymmetrically arranged with respect to each other about a central axis that extends in the first direction of the second wiring.09-20-2012
20120235766Surface Acoustic Wave Filter and Duplexer Component - A surface acoustic wave filter includes an arrangement of transducers having at least one first transducer one second transducer and one third transducer. The at least one first transducer is connected to the input terminal and a terminal for applying a reference potential. The second transducer is connected to the first output terminal and the terminal for applying the reference potential. The third transducer is connected to the second output terminal and the terminal for applying the reference potential. A capacitor is connected to at least one of a first and second output terminal in such a way that the capacitor is connected between the first and second output terminals or between one of the first and second output terminals and the terminal for applying the reference potential.09-20-2012
20130162367CIRCUIT SUBSTRATE - A circuit substrate includes: a laminate substrate in which a conductive layer and an insulating layer are laminated; a filter chip that has an acoustic wave filter and is provided inside of the laminate substrate; and a chip component that is provided on a surface of the laminate substrate and is connected to the filter chip, at least a part of the chip component overlapping with a projected region that is a region of the filter chip projected in a thickness direction of the laminate substrate.06-27-2013
20130162368LADDER-TYPE SURFACE ACOUSTIC WAVE FILTER AND DUPLEXER INCLUDING THE SAME - A ladder-type surface acoustic wave filter includes a first series resonator having the lowest resonance frequency among a plurality of series resonators; and a second series resonator having a resonance frequency higher than the first series resonator. The film thickness of a dielectric film in the region where the first series resonator is formed is larger than that of a dielectric film in the region where the second series resonator is formed.06-27-2013
20120112854DUPLEXER AND ELECTRONIC DEVICE HAVING THE SAME - In one aspect of the invention, a duplexer including a multilayer substrate with multiple stacked layers and a back surface with a rectangular shape is disclosed. An antenna terminal, a transmission terminal, a reception terminal, a ground terminal, and a conductor are provided in various positions on the multilayer substrate for improved performance.05-10-2012
20110032051DUPLEXER - Disclosed is a miniaturized duplexer having a good isolation characteristic. A duplexer having a high band side filter and a low band side filter that are each formed in a ladder-type filter provided on a common piezoelectric substrate is provided with a first elastic wave resonator to be included in one of these filters, a second elastic wave resonator to be included in the other of the filters, and a first additional grating reflector provided between these resonators to reflect an elastic wave leaked from a grating reflector of the first elastic wave resonator, and in which an additional grating reflector is not provided on a side opposite to the second elastic wave resonator in the first elastic wave resonator.02-10-2011
20100219905SURFACE ACOUSTIC WAVE RESONATOR, AND SURFACE ACOUSTIC WAVE FILTER AND ANTENNA DUPLEXER IN WHICH THE SURFACE ACOUSTIC WAVE RESONATOR IS USED - The present invention provides a surface acoustic wave resonator capable of improving the leak of a surface acoustic wave in the transverse direction and reducing the spurious and having superior characteristics. In a surface acoustic wave filter according to the present invention, an interdigital transducer electrode and reflector electrodes are formed on a piezoelectric substrate, and a SiO09-02-2010
20100007434Branching filter package - A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.01-14-2010
20120032753ANTENNA SHARER - An antenna sharer with both low loss and sharp attenuation characteristic in a wide band is achieved. Antennal sharer 02-09-2012
20100188166FILTER, DUPLEXER AND COMMUNICATION MODULE - According to an aspect of the invention, each of a filter, a duplexer and a communication module includes a plurality of series resonators connected to a signal line in series and a plurality of parallel resonators connected to the signal line in parallel. At least two of the plurality of parallel resonators are connected to the signal line between two of the plurality of series resonators in parallel, inductors are respectively connected to the at least two parallel resonators, and the inductors have different inductances from each other.07-29-2010
20120139662ELASTIC WAVE ELEMENT, AND ELECTRICAL APPARATUS AND DUPLEXER USING SAME - An acoustic wave device (06-07-2012
20110187478Antenna Matching Circuit - An antenna matching circuit includes at least two signal paths are connected to one antenna connection. The signal paths are designed to transmit and/or receive RF signals. A matching circuit includes a discrete line for phase shifting integrated at the antenna end in at least one of the signal paths. In this case, at least one of the capacitances contained in the discrete line is in the form of a micro-acoustic resonator, whose resonance is shifted sufficiently far that it is outside the pass band of the respective signal paths.08-04-2011
20080266023SURFACE ACOUSTIC WAVE DEVICE AND BOUNDARY ACOUSTIC WAVE DEVICE - A piezoelectric substrate is joined to a cover with a support layer disposed therebetween and with a space maintained therebetween. A transmission surface acoustic wave filter and a reception surface acoustic wave filter are disposed on a major surface of the piezoelectric substrate adjacent to the cover and inside the support layer. External electrodes are provided on the side of the cover opposite to the side facing the piezoelectric substrate. The external electrodes include an antenna terminal electrically connected to the transmission surface acoustic wave filter and the reception surface acoustic wave filter, a transmission input terminal electrically connected to the transmission surface acoustic wave filter, and a reception output terminal electrically connected to the reception surface acoustic wave filter. A portion of an interconnection line that electrically connects the reception surface acoustic wave filter to the antenna terminal is disposed on the cover.10-30-2008
20090273414Multi-Channel Filter Assemblies - A filter assembly includes an electrically conductive input member, an electrically conductive output member, and filter elements. Each filter element includes a connection disposed in an open or closed configuration, and a band filter, which may be a band-pass filter or a band-stop filter. A generic filter assembly is first manufactured having all connections in their open or closed configurations. A channel-selective filter assembly is then further manufactured by structural modification of one or more of the connections. Each connection of the channel-selective filter assembly is in its open or closed configuration independently of each other connection of each other filter element. Each frequency channel in a cable television (CATV) network, for example, is restricted or permitted by the channel-selective filter assembly.11-05-2009
20110063046SURFACE ACOUSTIC WAVE FILTER DEVICE, DUPLEXER INCLUDING THE SAME, AND ELECTRONIC APPARATUS INCLUDING THE SAME - A surface acoustic wave (SAW) filter device includes an input port for receiving an unbalanced signal, a pair of input/output ports, a first SAW filter for receiving the unbalanced signal from the input port and outputting balanced signals to the pair of input/output ports, a second SAW filter for receiving the balanced signals output from the pair of input/output ports and outputting balanced signals, and a pair of output ports for outputting the balanced signals output from the second SAW filter. The first SAW filter includes a first longitudinally-coupled SAW resonator having a first unbalanced signal input port and first and second balanced signal output ports, and a second longitudinally-coupled SAW resonator having a second unbalanced signal input port and third and fourth balanced signal output port. The first and second unbalanced signal input ports are electrically connected to the input port. The first and third balanced signal output ports both are electrically connected to one of the pair of input/output ports. The second and fourth balanced signal output ports both are electrically connected to another of the pair of input/output ports. This SAW filter device can suppress spurious and has a small insertion loss.03-17-2011
20090289741Duplexer and Communication Apparatus Using the Same - The present invention provides a duplexer using a ladder-type filter, which has a small size and is superior in isolation characteristic, and a communication apparatus using such a duplexer. A series resonator (R11-26-2009
20130099875ACOUSTIC WAVE DEVICE AND ANTENNA DUPLEXER EMPLOYING THE SAME - The present invention is an acoustic wave device including first and second acoustic wave resonators. A first tilt angle that is an angle formed between a direction perpendicular to a direction in which electrode fingers of the first acoustic wave resonator extend and a direction along which the electrode fingers are arranged is different from a second tilt angle that is an angle formed between a direction perpendicular to a direction in which electrode fingers of the second acoustic wave resonator extend and a direction along which the electrode fingers are arranged.04-25-2013
20120293276DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION DEVICE - A duplexer includes an unbalanced transmitting filter; a balanced receiving filter; a transmitting port connected to the transmitting filter; and a first receiving port and a second receiving port connected to the receiving filter. The duplexer also includes an electromagnetic coupling portion connected between the transmitting port and the first receiving port and between the transmitting port and the second receiving port. The electromagnetic coupling portion adjusts the phase between electric power that flows from the transmitting port to the first receiving port and electric power that flows from the transmitting port to the second receiving port.11-22-2012
20120293277FILTER, DUPLEXER, COMMUNICATION MODULE, COMMUNICATION DEVICE - The filter includes one or more series resonators and one or more parallel resonators. An inductance is connected in series to at least a parallel resonator of the parallel resonators, and a antiresonance frequency of the parallel resonator to which the inductance is connected in series is equal to or higher than that of the series resonators. The duplexer, the communication module and the communication device are provided with the filter.11-22-2012
20080246556Filter Assembly Comprising Two Bulk Wave Resonators - An arrangement includes a substrate, a filter, a first bulk acoustic wave resonator, a second bulk acoustic wave resonator, and a large surface covering. The first bulk acoustic wave resonator includes a first electrode and a second electrode and is arranged flatly on the substrate. The second bulk acoustic wave resonator includes a first electrode and a second electrode and is arranged flatly on the substrate. The large-surface covering includes a metal layer over the substrate. The metal layer is connected to a ground terminal.10-09-2008
20110267155FILTER ELEMENT, DUPLEXER AND ELECTRONIC DEVICE - A filter element includes a plurality of multilayer filters that are connected in cascade, each of the plurality of multilayer filters including a plurality of piezoelectric thin-film resonators stacked vertically, each of the piezoelectric thin-film resonators including a piezoelectric film and a pair of first electrodes between which the piezoelectric film is interposed, and a capacitor connected between an input terminal of one of the plurality of multilayer filters of a preceding stage and an input terminal of another one of the plurality of multilayer filters of a following stage, exciting directions of piezoelectric thin-film resonators to which the input terminals of the multilayer filters of the preceding and following stages are connected being opposite to each other.11-03-2011
20080238572Surface acoustic wave device and duplexer and communication device using the same - A surface acoustic wave device includes a first surface acoustic wave filter forming a ladder filter circuit; and a second surface acoustic wave filter having a passband at a frequency range higher than that of the first surface acoustic wave filter. The first surface acoustic wave filter includes a series-arm surface acoustic wave resonator, a parallel-arm surface acoustic wave resonator and an additional surface acoustic wave resonator. The series-arm surface acoustic wave resonator is on a series arm of the ladder filter circuit and includes an IDT electrode. The parallel-arm surface acoustic wave resonator is on a parallel arm of the ladder filter circuit and includes an IDT electrode. The additional surface acoustic wave resonator includes an IDT electrode, is connected in parallel with the series-arm surface acoustic wave resonator, and has a resonance frequency higher than the frequency range of the passband of the second surface acoustic wave filter.10-02-2008
20080290965Component Operating on Acoustic Waves - A component operating with acoustic waves is described herein. The component includes a substrate having an underside subdivided into a center area and an edge area surrounding die center area on all sides. The component also includes a plurality of outer terminals in the edge area, and a plurality of inner terminals in the center area comprising at least a first inner terminal configured as a signal terminal.11-27-2008
20080290964Branching filter package - A branching filter package has a SAW filter chip housing area which houses a piezo electric base, on which a transmitting SAW filter and a receiving SAW filter having a different frequency passing band with each other, are formed, and an impedance matching circuit and a branching circuit for the transmitting SAW filter and the receiving SAW filter.11-27-2008
20080272854Antenna duplexer and wireless terminal using the same - A technology which can realize a high-performance multiband operation in a compact circuit configuration and is advantageous for a wireless terminal of GSM system for which the further increase of the demands is expected in the future is provided. Provided is a multiband switch type antenna duplexer adopted in a mobile phone used in TDMA system such as the GSM system, in which the signals of respectively different first to fourth frequency bands (GSM 850, EGSM, DCS, PCS) share a single antenna, wherein switching elements such as receive filters and diodes are combined in various ways to perform the high-performance band switch with the minimum number of switching elements. The circuit of this antenna duplexer can realize not only the size reduction of the multiband switch antenna duplexer but also the size reduction and performance improvement of the wireless terminal itself.11-06-2008
20130214872ELASTIC WAVE FILTER, AND DUPLEXER AND ELECTRONIC DEVICE USING SAME - An elastic wave filter has first, second, and third IDT electrodes whose wiring electrodes are connected to unbalanced signal terminal; fourth IDT electrode disposed between the first and second IDT electrodes; fifth IDT electrode disposed between the second and third IDT electrodes; and first and second balanced signal terminals connected to the wiring electrodes of fourth and fifth IDT electrodes, respectively. The ground electrodes of the first through fifth IDT electrodes are connected to the ground. Signals in opposite phase and in phase with a signal input to unbalanced signal terminal are output from first and second balanced signal terminals, respectively. The wiring electrodes of second and third IDT electrodes are adjacent to the ground electrode of fifth IDT electrode. The wiring electrode of one of first and second IDT electrodes is adjacent to the wiring electrode of fourth IDT electrode. The ground electrode of the other is adjacent to the ground electrode of fourth IDT electrode. This configuration can suppress spuriousness in the bandpass.08-22-2013
20130214873ELASTIC WAVE DEMULTIPLEXER - In an elastic wave demultiplexer having excellent isolation characteristics, a first ground wiring electrode is connected to a second ground wiring electrode, via first ground via-hole electrodes. The first ground wiring electrode is connected to ground land electrodes via second ground via-hole electrodes. The second ground wiring electrode is connected to a ground terminal via third ground via-hole electrodes. The number of the first ground via-hole electrodes is greater than the number of the second ground via-hole electrodes and the number of the third ground via-hole electrodes.08-22-2013
20110204994BOUNDARY ACOUSTIC WAVE DEVICE AND COMMUNICATION EQUIPMENT - A boundary acoustic waves device includes a piezoelectric substrate (08-25-2011
20120068788ELASTIC WAVE APPARATUS AND DUPLEXER - An elastic wave apparatus includes a balanced-unbalanced transforming function, and an elastic wave filter and a multilayer wiring board on which the elastic wave filter is mounted. The elastic wave filter includes an unbalanced terminal and first and second balanced terminals. External electrodes used are provided on the multilayer wiring board. A first internal line connects the first balanced terminal and the external electrode. A second internal line connects the second balanced terminal and the external electrode. The lengths or shapes of the first internal line and the second internal line are set so that a capacitance used for the improvement of a balance is generated in an adjacent area A where the first internal line and the second internal line are adjacent to each other. In the adjacent area A, the directions of currents passing through the first internal line and the second internal line are the same.03-22-2012
20090096547ACOUSTICALLY COUPLED RESONATORS AND METHOD OF MAKING THE SAME - An apparatus includes a substrate with a cavity and a two-stage resonator filter fabricated over the cavity. The two-stage resonator filter includes a first stage and a second stage. The first stage includes a first resonator and a second resonator, the second resonator acoustically coupled to the first resonator. The second stage includes a third resonator and a fourth resonator, the fourth resonator acoustically coupled to the third resonator. The second resonator and the third resonators are electrically coupled. A decoupling layer couples the first resonator and the second resonator. The decoupling layer extends between the third resonator and the fourth resonator. The first resonator and the fourth resonator are above the substrate. The decoupling layer is above the first resonator and the fourth resonator. The second resonator and the third resonators are above the decoupling layer.04-16-2009
20110227668Surface Acoustic Wave Filter and Duplexer - A surface acoustic wave filter and a duplexer are provided. In a surface acoustic wave filter, on a piezoelectric substrate, a first IDT electrode composed of an input/output electrode and a first floating electrode, and a second IDT electrode composed of a ground electrode and a second floating electrode are arranged, and are connected in series to each other via the first floating electrode and the second floating electrode to form IDTs. In two serial IDTs arranged next to each other, an electrode finger of the input/output electrode in the first IDT electrode of the one serial IDT is arranged next to an electrode finger of the ground electrode in the second IDT electrode of the other serial IDT.09-22-2011
20090002096ANTENNA DUPLEXER, AND RF MODULE AND COMMUNICATION APPARATUS USING THE SAME - One of plurality of transmission terminals connected to a transmission filter and a receiving terminal connected to a receiving filter is a balanced type terminal, and another is an unbalanced type terminal. The transmission filter and the receiving filter includes surface acoustic wave resonators or film bulk acoustic resonators. The balanced type terminal is connected to a longitudinal mode coupled surface acoustic wave filter.01-01-2009
20090002097DUPLEXER - A duplexer includes a transmission filter having a ladder circuit configuration and a reception filter. The reception filter includes an input terminal connected to an antenna terminal, a first reception output terminal, and a second reception output terminal. A first filter element and a second filter element, each of which is a longitudinally coupled resonator filter element including a plurality of IDTs, are connected in parallel to the input terminal so that IDTs are connected to the input terminal. The first filter element the second filter element are connected to the first reception output terminal and the second reception output terminal, respectively.01-01-2009
20100148887ELASTIC WAVE DEVICE, DUPLEXER USING THE SAME, AND COMMUNICATION APPARATUS USING THE DUPLEXER - An elastic wave device includes resonators having a piezoelectric substrate, a resonation unit formed on the piezoelectric substrate, and reflectors formed on respective sides of the resonation unit on the piezoelectric substrate, and bumps formed on the piezoelectric substrate. The resonators are configured such that two or more split resonators are connected in parallel, and a bump is formed in a region sandwiched between reflectors of the split resonators.06-17-2010
20090315640DUPLEXER - A duplexer includes a transmitting filter including serial resonators and parallel resonators connected in a ladder configuration, and a receiving filter. A resonator of the serial resonators and the parallel resonators in the transmitting filter that is arranged closest to a common terminal of the transmitting filter and the transmitting filter includes a surface acoustic wave resonator, and at least one resonator excluding the resonator that is arranged closest to the common terminal includes a film bulk acoustic wave resonator.12-24-2009
20100225418Low band side filter of duplexer, high band side filter of duplexer, and duplexer - To improve an isolation characteristic in a pass frequency band of a high band side filter 09-09-2010
20120194294DUPLEXER - A duplexer includes a package substrate having layers stacked, a transmission filter and a reception filter that are provided on an upper surface of a first layer that is one of the layers of the package substrate, the transmission and reception filters being acoustic wave filters, a metal pattern provided on the upper surface of the first layer and formed to surround the transmission and reception filters, a transmission line provided on an upper surface of a second layer that is one of the layers of the package substrate and is positionally lower than the first layer, the transmission line electrically connecting the transmission filter and a transmission terminal together, and a reception line that is provided on the upper surface of the second layer and electrically connects the reception filter and a reception terminal. The thickness of the first layer is greater than that of the second layer.08-02-2012
20100237963SURFACE ACOUSTIC WAVE DEVICE AND DUPLEXER - A surface acoustic wave device in which miniaturization and a flat design implemented, is resistant to a deformation responsive to a pressure of a molten resin in the formation of a mold resin layer, and is less susceptible to a characteristic degradation. In the surface acoustic wave device, an IDT electrode is located on a piezoelectric substrate, and an insulator member is arranged such that a space B surrounding the IDT electrode is provided. For the purpose of reducing the area of the space B, reflectors having weighted portions are arranged on both sides of the IDT electrode. The weighted portions include electrode fingers of the reflectors that become shorter in length as they extend farther away from the IDT electrode. The shape of the space B is reduced accordingly.09-23-2010
20100134203FILTER AND ANTENNA DUPLEXER - There is provided a filter including a first resonator, a second resonator in which an excitation efficiency is reduced more than the first resonator, and an inductor connected in parallel with the second resonator.06-03-2010
20110018654RESONATOR FILTER WITH MULTIPLE CROSS-COUPLINGS - A filter device is provided for filtering signals. The filter device includes multiple series resonators, multiple shunt resonators and multiple cross-coupling circuits. The series resonators are connected in series between an antenna and one of a transmitter or a receiver. The shunt resonators are respectively connected between at least one of the series resistors and a ground voltage. The cross-coupling circuits are configured to bypass at least two series resonators of the multiple series resonators and at least one shunt resonator of the multiple shunt resonators.01-27-2011
20100164646SURFACE ACOUSTIC WAVE DEVICE, SURFACE ACOUSTIC WAVE FILTER AND ANTENNA DUPLEXER USING THE SAME, AND ELECTRONIC EQUIPMENT USING THE SAME - A surface acoustic wave device includes a substrate including lithium niobate; a IDT being provided on an upper surface of the substrate and including a plurality of electrode fingers; and a protective film covering the IDT and having an uneven shape on an upper surface thereof. When a pitch width of one pitch of the IDT is p, a width of one of the electrode fingers is p07-01-2010
20110128092DUPLEXER WITH NEGATIVE PHASE SHIFTING CIRCUIT - A duplexer includes first and second acoustic filters and a phase shifter. The first acoustic filter is connected between an antenna and the transmitter, and has a first passband. The second acoustic filter is connected between the antenna and the receiver, and has a second passband. The phase shifter includes at least one series capacitor connected in series with the antenna and at least one shunt inductor connected between the at least one capacitor and ground. The phase shifter is connected between the antenna and the first filter when the first passband is higher than the second passband, and provides a negative phase shift of an output impedance of the first filter. The phase shifter is connected between the antenna and the second filter when the second passband is higher than the first passband, and provides a negative phase shift of an input impedance of the second filter.06-02-2011
20120068787ELASTIC WAVE RESONATOR, LADDER FILTER AND DUPLEXER - An acoustic wave resonator that is excellent in terms of return loss characteristics at the resonant and anti-resonant frequencies and that is capable of effectively reducing loss includes an IDT electrode in which a plurality of first electrode fingers and a plurality of second dummy electrode fingers are connected to a first common electrode, a plurality of second electrode fingers and a plurality of first dummy electrode fingers are connected to a second common electrode. Apodization weighting is applied in the acoustic wave propagation direction. The metallization ratio of a non-crossing region is relatively high compared with the metallization ratio of a crossing region in the acoustic wave propagation direction.03-22-2012
20120200371ACOUSTIC WAVE DEVICE AND METHOD FOR MANUFACTURING THE SAME - An acoustic wave device includes: a piezoelectric substrate; a dielectric layer formed on the piezoelectric substrate; and first and second comb-tooth electrodes formed on the dielectric layer, the dielectric layer having a first thickness between the first comb-tooth electrodes and the piezoelectric substrate and a second thickness between the second comb-tooth electrodes and the piezoelectric substrate, the first and second thicknesses being different from each other.08-09-2012
20110248794Antenna Duplexer with High GPS Suppression - An antenna duplexer includes a transmission filter which operates in a transmission frequency band and has a transmission filter output. A reception filter operates in a reception frequency band and has a reception filter output. An antenna connection is connected to the transmission filter output and a matching element is connected between the antenna connection and the reception filter input. The circuit formed from the transmission filter, reception filter and matching element attenuates transmission signals in a frequency band whose frequencies f are in the interval 0.50*f10-13-2011
20110102102DUPLEXER - A duplexer that achieves a reduction in the size and an increase in the performance includes a transmission filter including piezoelectric thin film resonators and a reception filter including piezoelectric thin film resonators and an elastic wave resonator. The piezoelectric thin film resonators of the transmission filter and the piezoelectric thin film resonators and the elastic wave resonator of the reception filter are provided on the same substrate.05-05-2011
20110063047BOUNDARY ACOUSTIC WAVE FILTER AND MULTIPLEXER HAVING THE SAME - A boundary acoustic wave filter includes an input terminal, an output terminal, a boundary acoustic wave filter unit connected between the input terminal and the output terminal, and a boundary acoustic wave resonator that is connected between the input terminal and the boundary acoustic wave filter unit and includes a piezoelectric substrate, a dielectric layer formed on the piezoelectric substrate, and an IDT electrode that is disposed at a boundary between the piezoelectric substrate and the dielectric layer and has a pair of comb-shaped electrodes interdigitated with each other. The number of pairs of electrode fingers in the IDT electrode in the boundary acoustic wave resonator is in a range of approximately 57.5 to approximately 77.5.03-17-2011
20110001578SURFACE ACOUSTIC WAVE FILTER AND DUPLEXER USING THE SAME - A SAW filter includes a piezoelectric body, an IDT electrode on the piezoelectric body, and signal wiring electrically connected to the IDT electrode. The signal wiring has a thickness not less than a skin depth specified based on the frequency of a signal passing through the signal wiring and the electrical conductivity of the signal wiring. As a result, the signal wiring has low propagation loss of the signal passing through it, so that the SAW filter has excellent transmission characteristics.01-06-2011
20110175689ELASTIC WAVE DUPLEXER - In an elastic wave duplexer, a reception elastic wave filter element and a transmission elastic wave filter element are flip-chip mounted to a principal surface of a substrate. A sealing member is disposed on the principal surface of the substrate to cover and seal off at least one of the reception elastic wave filter element and the transmission elastic wave filter element. The sealing member has different thicknesses between a reception-element-covering region, which faces the reception elastic wave filter element on the side opposite from the substrate with respect to the reception elastic wave filter element, and a transmission-element-covering region, which faces the transmission elastic wave filter element on the side opposite from the substrate with respect to the transmission elastic wave filter element.07-21-2011
20110187479ACOUSTIC WAVE FILTER DEVICE - An acoustic wave filter device includes longitudinally coupled resonator-acoustic wave filters having a balanced-unbalanced conversion function, and increases the amount of attenuation in an attenuation band and improves the isolation characteristics when the acoustic wave filter device is used as a reception filter of a duplexer. The acoustic wave filter device includes an unbalanced terminal, first and second balanced terminals, first and second longitudinally coupled resonator-acoustic wave filters that are connected between the unbalanced terminal and the first balanced terminal and between the unbalanced terminal and the second balanced terminal, respectively, a first parallel resonator connected between the first balanced terminal and a ground potential, and a second parallel resonator connected between the second balanced terminal and the ground potential. The electrostatic capacitance of the first parallel resonator is different from the electrostatic capacitance of the second parallel resonator. Among the first parallel resonator and the second parallel resonator, the wavelength of the first parallel resonator having a relatively small electrostatic capacitance is shorter than the wavelength of the second parallel resonator having a relatively large electrostatic capacitance.08-04-2011
20080252394SURFACE ACOUSTIC WAVE DEVICE AND DUPLEXER - A surface acoustic wave device includes a supporting substrate, a LiTaO3 piezoelectric substrate joined on the supporting substrate, which has a normal line direction on a main surface thereof in a direction rotated 43° to 53° from a Y axis to a Z axis direction about an X axis, and an electrode pattern formed on the piezoelectric substrate.10-16-2008
20110018653DUPLEXER HAVING RESONATOR FILTERS - A duplexer interfacing a receiver and a transmitter with an antenna includes first and second filters. The first filter includes at least four first series resonators, four first shunt resonators respectively connected between the four first series resonators and ground voltage, and a mutual inductance commonly connected between two adjacent first shunt resonators. The second filter includes at least four second series resonators, four second shunt resonators respectively connected between the four second series resistors and the ground voltage, and a cross-coupling capacitor connected between a first capacitor node connected to at least one of the second series resonators and a second capacitor node connected to one of the second shunt resonators, and an inductor connected in series between second capacitor node and ground. Three of the second series resonators and the second shunt resonator to which the cross-coupling capacitor is connected are between the first and second capacitor nodes.01-27-2011
20110095844ELASTIC WAVE DEVICE AND LADDER FILTER DEVICE - An elastic wave device includes a first elastic wave resonator and a second elastic wave resonator that are connected in series to each other, and a resistor is connected in parallel with the first elastic wave resonator while no resistors are connected in parallel with the second elastic wave resonator.04-28-2011
20120098618Surface Acoustic Wave Filter and Duplexer Using Same - An SAW filter and a duplexer excellent in electrical characteristics will be provided. An SAW filter has a piezoelectric substrate 04-26-2012
20100194495DUPLEXER - A duplexer includes a transmission filter having a ladder circuit configuration and a reception filter. The reception filter includes an input terminal connected to an antenna terminal, a first reception output terminal, and a second reception output terminal. A first filter element and a second filter element, each of which is a longitudinally coupled resonator filter element including a plurality of IDTs, are connected in parallel to the input terminal so that IDTs are connected to the input terminal. The first filter element the second filter element are connected to the first reception output terminal and the second reception output terminal, respectively.08-05-2010
20100194494HIGH FREQUENCY DEVICE, FILTER, DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS - In a high frequency device, resonators (IDT capacitors) that function as capacitors are included in a lumped constant balun included in a filter or duplexer, and furthermore, the resonance frequency of the IDT capacitors is set higher than the passband frequency of the filter. This improves the capacitor Q value, thus enabling the realization of a low-loss balance filter.08-05-2010
20100026417Surface Acoustic Wave Filter - An electric filter has a band-pass filter that includes a track with acoustically coupled electroacoustic transducers. The filter includes a band-stop filter with at least one electroacoustic series element and at least one electroacoustic parallel element. The series element of the band-stop filter is connected in series to at least one of the transducers of the band-pass filter. The parallel element of the band-stop filter is arranged in a shunt arm that is electrically connected to at least one of the transducers of the band-pass filter. In at least one of the electroacoustic elements of the band-stop filter, the resonance frequency and the anti-resonance frequency lie outside the passband of the band-pass filter.02-04-2010
20090079514HYBRID ACOUSTIC RESONATOR-BASED FILTERS - A hybrid acoustic resonator filter and a communication device with a hybrid acoustic resonator filter is described.03-26-2009
20120306591ELECTRONIC CIRCUIT AND ELECTRONIC MODULE - An electronic circuit includes a plurality of duplexers that are coupled to an antenna terminal and have a pass band different from each other and a plurality of acoustic wave filters that are respectively coupled between the antenna terminal and the plurality of the duplexers, wherein filter characteristics of a first acoustic wave filter of the plurality of the acoustic wave filters are set so as to allow passage of a signal in both a pass band for transmitting and a pass band for receiving of a first duplexer of the plurality of the duplexers that is coupled to the first acoustic wave filter and suppress passage of a signal in both a pass band for transmitting and a pass band for receiving of a second duplexer of the plurality of the duplexers that is different from the first duplexer.12-06-2012
20100097161SURFACE ACOUSTIC WAVE FILTER, ANTENNA DUPLEXER AND METHOD FOR MANUFACTURING THEM - A surface acoustic wave filter comprised of a plurality of surface acoustic wave resonators having different resonance frequencies, the filter comprising a substrate made of a lithium niobate, comb electrodes (04-22-2010
20110316649Reactance Filter Having a Steep Edge - A reactance filter includes a series branch that connects a signal input to a signal output. At least one parallel branch branches off from the series branch with respect to ground. A parallel resonator is arranged in each parallel branch. Two or more series resonators are connected in series in the series branch. A capacitor is connected in parallel with one of the series resonators in the series branch.12-29-2011
20110316648ELASTIC-WAVE LADDER FILTER - An elastic-wave ladder filter significantly reduces loss within a passband while also increasing the passband and attenuation. The elastic-wave ladder filter includes a series arm that connects an input end and an output end and a parallel arm that connects the series arm and a ground potential. The series arm includes at least three series arm resonators connected to each other in series. The resonant frequencies of the at least three series arm resonators differ from each other. An aspect ratio of the series arm resonator having the lowest resonant frequency is larger than an average of the aspect ratios of all the series arm resonators when the aspect ratio is defined as a ratio of an overlap width of electrode fingers of a series arm resonator to a number of pairs of the electrode fingers.12-29-2011
20110316647ELASTIC WAVE BRANCHING FILTER - A reception filter includes a first and second longitudinally coupled resonator-type surface acoustic wave filter portions and a surface acoustic wave resonator. The first and second longitudinally coupled resonator-type surface acoustic wave filter portions each include at least three IDT electrodes. The surface acoustic wave resonator includes one IDT electrode connected to at least one of the at least three IDT electrodes. The reception filter is arranged such that a ratio of a capacitance of the surface acoustic wave resonator to a capacitance of each of the at least one of the at least three IDT electrodes included in the longitudinally coupled resonator-type surface acoustic wave filter portion, the at least one of the at least three IDT electrodes being electrically connected to the one IDT electrode of the surface acoustic wave resonator, is in the range of about 1.9 to about 2.5.12-29-2011
20120044027ACOUSTIC WAVE RESONATOR AND DUPLEXER USING SAME - An acoustic wave resonator includes a piezoelectric body, an IDT electrode for exciting an acoustic wave with wavelength λ, and a dielectric thin film provided so as to cover the IDT electrode. The IDT electrode includes a bus bar electrode region, a dummy electrode region, and an IDT cross region in order from outside. The film thickness of the dielectric thin film above at least one of the bus bar electrode region and the dummy electrode region is smaller than that above the IDT cross region by 0.1λ to 0.25λ. This configuration provides an acoustic wave resonator that reduces transverse-mode spurious emission.02-23-2012
20120062337ANTENNA SHARING DEVICE - The antenna sharing device has a first elastic-wave filter for passing signals of a first frequency passband and a second elastic-wave filter for passing signals of a second frequency passband higher than the first frequency passband. The first elastic-wave filter is a ladder-type filter including a first series resonator and a second series resonator having an antiresonant frequency point higher than that of the first series resonator. The first series resonator has a first IDT electrode and a first dielectric film covering the electrode. The second series resonator has a second IDT electrode and a second dielectric film covering the electrode. The first and the second dielectric films have a first projection and a second projection, respectively, so as to be formed above the electrode fingers of each IDT electrode. The cross-sectional area of the first projection of the first series resonator is larger than that of the second projection of the second series resonator in the excitation direction of the elastic wave. The structure satisfies both of steepness in a crossband and low loss in a passband.03-15-2012
20110156837ACOUSTIC WAVE DEVICE, AND FILTER AND DUPLEXER USING THE SAME - An acoustic wave device includes a piezoelectric substrate, an IDT electrode provided on the piezoelectric substrate, a dielectric layer provided so as to cover the IDT electrode, and a first stress relaxation layer provided on the dielectric layer. Furthermore, the acoustic wave device includes an extraction electrode connected to the IDT electrode and extracted onto the first stress relaxation layer, and a bump provided on the extraction electrode. An elastic modulus of the first stress relaxation layer is smaller than that of the dielectric layer.06-30-2011
20110156836DUPLEXER DEVICE AND METHOD OF MANUFACTURING THE SAME - There is provided a duplexer device and a method of manufacturing the same. The duplexer device includes a substrate including a duplex circuit; first and second acoustic wave filter chips mounted on the substrate in a flip chip bonding manner and constituting an Rx (receiver) filter and a Tx (transmitter) filter, respectively; and a molding portion covering the first and second acoustic wave filter chips. The first and second acoustic wave filter chips are arranged by flip chip bonding, so there is no need for a separate protective structure so as to protect device functional portions of the chips. Accordingly, a compact product is realized and a manufacturing process is simplified.06-30-2011
20120007693DUAL IN-SITU MIXING FOR EXTENDED TUNING RANGE OF RESONATORS - A dual in-situ mixing approach for extended tuning range of resonators is described. In one embodiment, a dual in-situ mixing device tunes an input radio-frequency (RF) signal using a first mixer, a resonator body, and a second mixer. In one embodiment, the first mixer is coupled to receive the input RF signal and a local oscillator signal. The resonator body receives the output of the first mixer, and the second mixer is coupled to receive the output of the resonator body and the local oscillator signal to provide a tuned output RF signal as a function of the frequency of local oscillator signal.01-12-2012
20110095845ACOUSTIC WAVE DUPLEXER - An acoustic wave duplexer includes a piezoelectric substrate, a first filter and a second filter whose center frequency is higher than that of the first filter, the first and second filters being provided on the piezoelectric substrate. The first filter is structured as a ladder type. A resonator positioned nearest to an antenna terminal out of series-arm resonators is designated as a first resonator. A pitch of a comb-shaped electrode structuring the first resonator is set such that a bulk wave emission frequency of the first resonator becomes higher than a passband of the second filter.04-28-2011
20120013419RADIO FREQUENCY FILTER AND RADIO FREQUENCY DUPLEXER INCLUDING BULK ACOUSTIC WAVE RESONATORS - A Radio Frequency (RF) duplexer including Bulk Acoustic Wave Resonators (BAWRs) and an RF filter including BAWRs are provided. The RF duplexer may convert the received signal into a balance signal and output the balance signal via a dual-output port. The RF duplexer may also include a BAWR receiving filter unit including an input end to receive the balance signal from the dual-output port, and an output end used for dual output. The RF duplexer may also include a BAWR transmitting filter unit to transmit a transmitted signal to the antenna via a single-output port.01-19-2012
20120062336Duplexer - Disclosed is a receiving side filter in a pass band of a duplexer's transmitting side filter. Output balancing is performed by the receiving side filter, which includes a longitudinal mode resonator type filter. A pass band of the receiving side filter is set on a lower band side than the pass band of the transmitting side filter. Between an antenna port and a pair of balanced reception ports, first and second ladder-type filters are provided. The first includes a series arm and a parallel arm, each formed of a SAW resonator and a longitudinal mode resonator type filter. The second ladder-type filter has series arms, formed of SAW resonators respectively provided in signal paths that connect the respective balanced reception ports and the longitudinal mode resonator type filter, and a parallel arm formed of a SAW resonator and connecting between these signal paths.03-15-2012
20120154071COMBINED BALUN AND IMEDANCE MATCHING CIRCUIT - An apparatus for providing impedance matching between a single-ended circuit and a differential circuit includes first and second capacitors and first and second inductors. The first capacitor is connected between an input/output of the single-ended circuit and a first differential input/output of the differential circuit. The first inductor is connected between the input/output of the single-ended circuit and a second differential input/output of the differential circuit. The second capacitor is connected between the second differential input/output of the differential circuit and ground. The second inductor is connected between the first differential input/output of the differential circuit and the second differential input/output of the differential circuit.06-21-2012
20120154072FBAR DUPLEXER MODULE AND FABRICATION METHOD THEREOF - Disclosed is a fabrication method for miniaturizing a film bulk acoustic wave resonator (FBAR) duplexer module including two FBAR filters, a tuning inductor, and a phase shifter. An exemplary embodiment of the present disclosure provides a method of miniaturizing a FBAR duplexer module, including forming a tuning inductor in a multilayer printed circuit board (PCB), forming a phase shifter in the multilayer PCB, and forming at least one of a transmitting FBAR filter and a receiving FBAR filter in the multilayer PCB.06-21-2012
20090002095Antenna Branching Filter - In an antenna duplexer including a high band side filter, a low band side filter, and a phase shifter in a low pass configuration inserted between the high band side filter and an antenna port and taking phase matching of both filters, a resonance inductor resonating with a capacitor on the antenna port side is provided to obtain a attenuation characteristic in an optional band in an out-of-pass band of both filters by the resonance. For instance, the maximum attenuation is held at twice of the center frequency f01-01-2009
20120119847FILTER CIRCUIT, DUPLEXER AND RF MODULE - A filter circuit includes a filter part connected between an input terminal and an output terminal and configured to have a passband, and a path connected in parallel with the filter part between the input terminal and the output terminal, the path having an impedance that enables a first signal passing through the path from the input terminal to the output terminal and a second signal passing through the filter part from the input terminal to the output terminal to have an opposite phase relationship in a frequency band outside of the passband and have almost equal amplitudes in the frequency band.05-17-2012
20120126913DUPLEXER - A duplexer with a reduced filter loss is provided. The duplexer includes two or more filters F05-24-2012
20100219906ACOUSTIC WAVE DEVICE, DUPLEXER, COMMUNICATION MODULE, COMMUNICATION APPARATUS, AND MANUFACTURING METHOD FOR ACOUSTIC WAVE DEVICE - An acoustic wave device includes a piezoelectric substrate, interdigital electrodes arranged on the piezoelectric substrate, a first dielectric element arranged between the interdigital electrodes, a second dielectric element that covers the interdigital electrodes and the first dielectric element, and an adjustment element that has been formed on the first dielectric element. The adjustment element has been formed from a material whose specific gravity is greater than that of the first dielectric element and that of the second dielectric element.09-02-2010
20110181372ELASTIC-WAVE FILTER DEVICE - An elastic-wave filter device includes a package substrate and filter mounting pattern provided on a first main surface of the package substrate on which a longitudinally coupled resonator-type elastic-wave filter is mounted, a back-side terminal pattern is provided on a second main surface thereof, and an internal electrode pattern is provided inside the package substrate. When seen in plan view from a direction perpendicular or substantially perpendicular to the first main surface of the substrate body, first via conductors electrically connecting a ground pattern element of the filter mounting pattern connected to a ground pad of the longitudinally coupled resonator-type elastic-wave filter and an internal ground pattern element of the internal electrode pattern are arranged asymmetrically with respect to a center line X-X passing through an input pattern element of the filter mounting pattern and through two output pattern elements07-28-2011
20120313725FILTER, DUPLEXER, COMMUNICATION MODULE AND COMMUNICATION DEVICE - The filter includes: a primary transducer connected to a primary terminal; a secondary transducer connected to a plurality of secondary terminals; and a coupling transducer for mechanically coupling the primary transducer and the secondary transducer.12-13-2012
20120313726FILTER, DUPLEXER, COMMUNICATION MODULE AND COMMUNICATION DEVICE - A filter includes a plurality of primary resonators connected to a serial arm, a plurality of secondary resonators connected to a parallel arm, a primary inductor connected to at least one of the plurality of primary resonators and a secondary inductor connected to at least one of the plurality of secondary resonators. The primary inductor is arranged so as not to be connected to a path between the secondary resonator to which the secondary inductor is connected in parallel and the primary resonator that is connected to the secondary resonator to which the secondary inductor is connected in parallel.12-13-2012
20120313724ELASTIC WAVE FILTER DEVICE AND ANTENNA DUPLEXER USING SAME - An elastic wave filter device includes a longitudinally coupled resonator-type elastic wave filter formed on a piezoelectric substrate; and a ladder-type elastic wave filter connected to the resonator-type elastic wave filter. The resonator-type filter includes an input IDT and an output IDT. The ladder-type filter includes a series arm resonator and a parallel arm resonator. A first ground electrode connected to the parallel arm resonator is electrically separated from a second ground electrode connected to at least one of the input IDT and the output IDT.12-13-2012
20090058557ANTENNA SHARING DEVICE - An antenna duplexer includes a piezoelectric substrate having a surface, a grounding terminal to be grounded, first and second surface acoustic wave (SAW) filters mounted on the piezoelectric substrate, first and second terminals connected to the first and second SAW filters, respectively, and a line mounted on the surface of the piezoelectric substrate between the first SAW filter and the second SAW filter. A stray coupling path is produced between the first and second terminals. A first end of the line is connected to the grounding terminal. A second end of the line opens and is coupled capacitively to the stray coupling path. The antenna duplexer has large isolation characteristic between the surface acoustic wave filters.03-05-2009
20100052815SINGLE CAVITY ACOUSTIC RESONATORS AND ELECTRICAL FILTERS COMPRISING SINGLE CAVITY ACOUSTIC RESONATORS - A single cavity acoustic resonator comprises: a first electrode; a second electrode; a third electrode disposed between the first electrode and the second electrode. The single cavity acoustic resonator also comprises: a first piezoelectric layer disposed between the third electrode and the first electrode, and comprising a first C-axis having an orientation; and a second piezoelectric layer disposed between the third electrode and the second electrode, and comprising a second C-axis having an orientation parallel to the first C-axis. Application of a time varying electrical signal at a drive frequency to either the third electrode or to the first and second electrodes results in a resonance of the single cavity acoustic resonator at twice a fundamental resonant frequency and a cancellation of substantially all even-order mixing products in the single cavity resonator. An electrical filter and a duplexer are also described.03-04-2010
20120176206ACOUSTIC WAVE FILTER, COMMUNICATION MODULE, AND METHOD FOR MANUFACTURING THE FILTER - An acoustic wave filter includes: a substrate; resonators that are arranged on the substrate and excite acoustic waves; a ground terminal on the substrate; interconnection lines interconnecting the resonators and connecting predetermined ones of the resonators to the ground terminal; and a shield electrode disposed so as to be close to and face the interconnection lines.07-12-2012
20100007435Duplexer - To provide a duplexer which is small in size and excellent in separation characteristic of transmission/reception signals. An antenna port is disposed on a center of a rearward side in a disposition area of a duplexer, a high band side filter and a low band side filter are respectively disposed on a left side and a right side of the antenna port, a parallel arm at a last stage in the low band side filter, a parallel arm at a last stage in the high band side filter, a first signal port and a second signal port seen from the antenna port are positioned on a forward side of the antenna port, a ground side of a parallel arm on a front stage side of the parallel arm at the last stage in the low band side filter and a ground side of a parallel arm on a front stage side of the parallel arm at the last stage in the high band side filter are mutually connected via a conductive path formed on a piezoelectric substrate at a rearward side of the antenna port, and the parallel arms connected by the conductive path are positioned on the rearward side of the parallel arms at the last stages. Accordingly, a separation characteristic at a high band side is improved.01-14-2010
20120299665ELECTRONIC COMPONENT AND PRODUCTION METHOD THEREOF - A production method of an electronic component includes: forming a sheet having a resin layer and a metal layer formed under the resin layer; bonding the sheet to a substrate so that the metal layer is arranged on a functional portion of an acoustic wave element formed on the substrate, a frame portion surrounding the functional portion is formed between the metal layer and the substrate, a cavity is formed on the functional portion by the metal layer and the frame portion, and the resin layer covers the metal layer and the frame portion.11-29-2012
20120299664FILTER AND DUPLEXER - A filter includes one or a plurality of parallel resonators coupled in parallel and one or a plurality of a film bulk acoustic resonators coupled in series, the film bulk acoustic resonator having a substrate, a lower electrode, a piezoelectric membrane, and an upper electrode, wherein: at least one of the lower electrode and the upper electrode has a thick membrane region having a thickness larger than that of a center portion of a resonance region at an edge of the resonance region, the resonance region being a region where the lower electrode and the upper electrode face with each other through the piezoelectric membrane; and a width of the thick membrane region is smaller than a wavelength of an acoustic wave propagating in a direction crossing a thickness direction of the piezoelectric membrane.11-29-2012
20120182088DUPLEXER - A duplexer includes a reception filter that is connected between a reception terminal and an antenna terminal and includes one or a plurality of series resonators that are acoustic wave resonators, and a transmission filter that is connected between a transmission terminal and the antenna terminal and includes one or a plurality of acoustic wave resonators, a resonance frequency of a first series resonator that is one of the one or the plurality of series resonators and is closest to the antenna terminal in the reception filter being higher than an upper limit frequency of a reception band of the reception filter.07-19-2012
20120182087SINGLE-CHIP DUPLEXER WITH ISOLATION SHIELD BETWEEN TRANSMIT AND RECEIVE FILTERS - A single-chip duplexer, interfacing a receiver and a transmitter with a common antenna, includes transmit and receive filters, an annular sealing ring and a conductive stripe. The transmit filter is connected between the antenna and the transmitter, and has a transmit passband. The receive filter is connected between the antenna and the receiver, and has a receive passband different from the transmit passband. The annular sealing ring is connected between a surface of the chip and a surface of a cap to form a sealed cavity between the chip and the cap. The conductive stripe extends across at least a portion of the surface of the chip between the transmit filter and the receive filter, the conductive stripe being directly connected to the sealing ring and electrically connected to ground. The conductive stripe provides at least one of magnetic shielding and capacitive shielding between the transmit filter and the receive filter.07-19-2012
20120188026ANTENNA DUPLEXER - An antenna duplexer includes first and second filters connected to an antenna terminal. The first filter has a passband of a low frequency band. The second filter has a passband of a high frequency band. The second filter is a ladder-type filter including series-arm resonators and parallel-arm resonators. At least one parallel-arm resonator out of the parallel-arm resonators has a main resonance and an auxiliary resonance. Attenuation poles caused by the main resonance and the auxiliary resonance are within the low frequency band. This antenna duplexer has a high attenuation characteristic and a high isolation characteristic while maintaining a low insertion loss.07-26-2012
20120256702TUNABLE DUPLEXER METHOD USING HYBRID TRANSFORMER WITH DUAL ANTENNA - The present disclosure relates to a hybrid transformer duplexer apparatus. The hybrid transformer duplexer apparatus includes an autotransformer having a first port, a second port and a tap coupled to a first antenna port. A step-down transformer has a primary winding with a first terminal coupled to the first port of the autotransformer and a second terminal coupled to the second port of the autotransformer, and a secondary winding having a third terminal coupled to a second antenna port and a fourth terminal coupled to a common node.10-11-2012
20080284540ANTENNA DUPLEXER - An antenna duplexer is provided, which can be built with a smaller size and lower height than ever without compromising out-of-band attenuation characteristic and isolation characteristic between a transmit terminal and a receive terminal. The antenna duplexer includes a transmit filter provided between an antenna terminal and the transmit terminal, and a receive filter provided between the antenna terminal and the receive terminal. The filters are enclosed by a package, in which a ground pattern for the receive filter is separated from other ground patterns.11-20-2008
20110248795BAND REJECT FILTERS - Distributed band reject filters are disclosed. A band reject filter includes a first acoustic resonator and a second acoustic resonator, each of which has either shunt resonators adapted to resonate substantially at respective resonance frequencies defining a rejection frequency band or series resonators adapted to anti-resonate substantially at respective anti-resonance frequencies defining the rejection frequency band. These resonators are connected through a phase shifter which imparts an impedance phase shift of approximately 45° to 135°. Exemplary applications of the band reject filters disclosed herein include implementation as an inter-stage band reject filter for a base station power amplifier for a wireless communication system, as a radio frequency band reject filter in a duplexer for a wireless communication terminal, and in a low noise amplifier input stage.10-13-2011
20120326801DUPLEXER - A duplexer includes an acoustic wave element having a first terminal and a second terminal; a substrate; a first columnar conductor electrically connected to the first terminal, and drawn to a back surface of the substrate while partially in the substrate; a second columnar conductor electrically connected to the second terminal, and drawn to the back surface of the substrate while partially in the substrate. Additionally, a first ground pattern region is between the first columnar conductor drawn part and the second columnar conductor drawn part on the back surface of the substrate; a second ground pattern region is electrically connected to the first ground pattern region and arranged in the part not including the part between the first columnar conductor drawn part and the second columnar conductor drawn part; and a third columnar conductor electrically is connected to the first ground pattern region while partially in the substrate.12-27-2012
20120286896SURFACE ACOUSTIC WAVE FILTER DEVICE - A small-sized surface acoustic wave filter device having favorable filter characteristics includes a transmission-side surface acoustic wave filter chip including a ladder surface acoustic wave filter unit located on a piezoelectric substrate. The ladder surface acoustic wave filter unit includes a series arm connected between an input pad and an output pad and a plurality of resonators and including at least one first resonator connected to the input pad or the output pad. A die-attach surface is provided with an inductor connected to the first resonator. The inductor is arranged such that at least a portion thereof faces the first resonator and does not face any of the plurality of resonators and other than the first resonator.11-15-2012
20120286895LADDER FILTER, DUPLEXER AND MODULE - A ladder filter includes at least one series resonator connected in series between an input terminal and an output terminal, at least one parallel resonator connected in parallel with the at least one series resonator, and an inductor connected in parallel with the at least one series resonator. The at least one series resonator and the inductor generate a first attenuation pole at a frequency equal to or lower than a frequency band defined by the at least one series resonator and the at least one parallel resonator. The first attenuation pole is located at a frequency that is equal to or higher than a resonance frequency of a parallel resonator that is included in the at least one parallel resonator and has a highest resonance frequency and that is equal to or lower than a high-frequency end of the pass band.11-15-2012
20080246557Component Comprising at Least One Filter that Operates with Acoustic Waves - A component includes a first filter configured to work with acoustic waves. The first filter includes a first sub-filter on a first chip and a second sub-filter on a second chip separate from the first chip. The first filter if a different type of filter, has a different layer structure, or has a different layer thicknesses for at least one layer in comparison to the second filter.10-09-2008
20130113576DUPLEXER, FILTER AND COMMUNICATION MODULE - A duplexer includes: a transmit filter that is connected between an antenna terminal and a transmit terminal and has a plurality of acoustic wave resonators; a receive filter that is connected between the antenna terminal and a receive terminal and has a plurality of acoustic wave resonators; and a delay line or a longitudinal coupling type resonator that is connected in parallel with at least one of the plurality of acoustic wave resonators of the transmit filter and the plurality of acoustic wave resonators of the receive filter and has at least two IDTs (Interdigital Transducers).05-09-2013
20130127565DUPLEXER - A duplexer includes a transmission filter and a reception filter having different passbands, wherein: first resonators that are series resonators or parallel resonators included in the transmission and reception filters so as to form a skirt characteristic at a guard band side are a temperature compensated type piezoelectric thin film resonator or a surface acoustic wave resonator using Love waves, and second resonators that form a skirt characteristic at an opposite side to the guard band are one of a temperature non-compensated type piezoelectric thin film resonator, a surface acoustic wave resonator using a lithium tantalate substrate or a substrate made by bonding a lithium tantalate substrate on a sapphire substrate, and a surface acoustic wave resonator using Love waves.05-23-2013
20130127566FILTER AND DUPLEXER - A filter includes: first series resonators and first parallel resonators that are connected in a ladder shape between an input terminal and an output terminal; a first inductor that is connected in parallel to at least one first series resonator; one or more second parallel resonators that are provided separately from the first parallel resonators, are connected between the input terminal and the output terminal, and have a resonance frequency and an anti-resonance frequency at frequencies lower than a passband formed by the first series resonators and the first parallel resonators; wherein an attenuation region is formed by a first attenuation pole formed by the at least one first series resonator and the first inductor and a second attenuation pole formed by a resonant response of the one or more second parallel resonators.05-23-2013
20130147578DUPLEXER - A duplexer includes: a first filter of which first and second ends connect to a common terminal and a first terminal respectively; and a second filter having a passband higher than that of the first filter, a first end and second end thereof connecting to the common terminal and a second terminal respectively, wherein a phase shifter is located neither between the first filter and the common terminal nor between the second filter and the common terminal, the second filter is a ladder-type filter including piezoelectric thin film resonators connected in a ladder shape, a propagation constant in a direction perpendicular to a thickness direction of a piezoelectric thin film in the piezoelectric thin film resonator is a real number at frequencies lower than a resonance frequency of the piezoelectric thin film resonator, and a resonator at a first stage is a parallel resonator in the second filter.06-13-2013
20130147577FILTER AND DUPLEXER - A filter includes: a plurality of piezoelectric thin film resonators, each having a multilayered film including a lower electrode located on a substrate, a piezoelectric film located on the lower electrode, and an upper electrode located on the piezoelectric film so as to face the lower electrode, wherein at least two piezoelectric thin film resonators have thick film portions, in each of which the multilayered film is thicker in at least a part of an outer peripheral portion than in an inner portion of a resonance region in which the lower electrode and the upper electrode face each other across the piezoelectric film, and lengths of the thick film portions from edges of the resonance regions are different from each other in the at least two piezoelectric thin film resonators.06-13-2013
20130141185FILTER AND DUPLEXER - A filter includes: a coupled multi-mode acoustic wave filter connected between an input terminal and an output terminal; a first inductor connected between the coupled multi-mode acoustic wave filter and a ground terminal; an acoustic wave resonator, one end of which is connected between the input terminal or the output terminal and the coupled multi-mode acoustic wave filter; and a second inductor connected between another end of the acoustic wave resonator and the ground terminal.06-06-2013
20120274418BRANCHING FILTER - A branching filter includes a ladder-type elastic wave filter unit connected between an antenna terminal and a transmission signal terminal and a longitudinally coupled resonator-type elastic wave filter unit connected between an antenna terminal and first and second balanced reception signal terminals while maintaining the isolation characteristics between the transmission signal terminal and the first and second reception signal terminals. In a duplexer, a transmission signal propagation direction is perpendicular or substantially perpendicular to each of a first reception signal propagation direction and a second reception signal propagation direction.11-01-2012
20120274417MULTIPLEXER - A multiplexer that includes three or more band-pass filters having different pass bands and has a reduced size, includes a duplexer and a third band-pass filter connected to an antenna terminal, the duplexer and the third band-pass filter are connected in parallel, the duplexer includes a first band-pass filter having a first pass band and a second band-pass filter having a second pass band different from the first pass band, and the third band-pass filter has a third pass band different from the first and second pass bands.11-01-2012
20120274416LADDER FILTER, DUPLEXER AND MODULE - A ladder filter includes at least one series resonator connected in series between an input terminal and an output terminal, at least one parallel resonator connected in parallel with the at least one series resonator, an additional resonator connected in series between the at least one series resonator and one of the input terminal and the output terminal, and an inductor connected in series to the additional resonator, the additional resonator having a resonance frequency higher than an anti-resonance frequency of the at least one series resonator.11-01-2012
20130154763ELASTIC WAVE BRANCHING FILTER - An elastic wave surface acoustic wave duplexer includes an antenna terminal, a transmission filter, a reception filter, and a plurality of elastic wave resonators connected in series between the antenna terminal and the reception filter. The reception filter is a longitudinally coupled resonator-type surface acoustic wave filter including a plurality of IDT electrodes and arranged along a propagation direction of elastic wave. A combined capacitance of the plurality of surface acoustic wave resonators is smaller than a capacitance of the IDT electrodes and included in the plurality of IDT electrodes and connected to the antenna terminal.06-20-2013
20130200960Component Working with Acoustic Waves having Reduced Temperature Coefficient of Frequencies and Method for Producing Same - A component is designed to work with acoustic waves. Embodiments have an improved temperature gradient of the frequency range and have increased performance strength. To this end, the component includes a stack of layers having a lower bonding layer, an electrode layer, an upper bonding layer, a compensation layer, and a trimming layer.08-08-2013
20120086521LADDER TYPE SURFACE ACOUSTIC WAVE FILTER AND DUPLEXER USING SAME - An object of the present invention is to improve the passing characteristic at high temperature in a ladder-type elastic wave filter and a duplexer including the filter. The ladder-type elastic wave filter of the present invention includes a piezoelectric substrate, a first series elastic-wave resonator formed on the piezoelectric substrate and connected in series between the input and output terminals of the filter, a parallel elastic-wave resonator formed on the piezoelectric substrate and connected in parallel between the series elastic-wave resonator and the ground terminal, and a dielectric film formed on the piezoelectric substrate so as to cover the first series elastic-wave resonator. The piezoelectric substrate is formed of a material with a negative temperature coefficient. The dielectric film is formed of a material with a positive temperature coefficient and its film thickness is formed thicker than that with which the frequency-temperature coefficient of the first series elastic-wave resonator becomes 0.04-12-2012
20120086520ELASTIC WAVE DEVICE AND DUPLEXER - An elastic wave device includes an unbalanced terminal and first and second balanced terminals. A longitudinally-coupled-resonator-type first elastic wave filter is provided between the unbalanced terminal and the first balanced terminal. An elastic wave filter, which is connected in parallel with the first elastic wave filter, is connected between the unbalanced terminal and the second balanced terminal. The current paths through which IDT electrodes of the elastic wave filter and the elastic wave filter are connected to ground terminals, are not symmetrical.04-12-2012
20130207743DUPLEXER WITH BALUN - A duplexer is proposed with a substrate which has at least one patterned metallization plane and on which, at least to some extent, a transmission path (TX) and a reception path (RX) are arranged, both of which are connected to an antenna connection (ANT). The duplexer comprises a transmision filter (TXF) which is arranged in the transmission path (TX) and which has a first acoustic wase filter (BAW08-15-2013

Patent applications in class Utilizing electromechanical transducer