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With variable reactance for tuning antenna

Subclass of:

343 - Communications: radio wave antennas

343700000 - ANTENNAS

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
343748000 Loop type 9
343747000 Balanced doublet type 6
343746000 Slot type 5
20080258985Internal Antenna for Handset and Design Method Thereof - The present invention relates to an internal antenna for a handset and a design method thereof. The present invention provides an internal antenna for a handset and a design method thereof characterized in that a L/C element is attached to a slot line of an internal antenna, the attached L/C element is moved along the slot line, or the L/C element having a predetermined inductance/capacitance is attached and detached, thereby easily matching a resonant frequency.10-23-2008
20130038494ADJUSTABLE ANTENNA APPARATUS AND METHODS - An adjustable monopole antenna apparatus and methods. In one embodiment, the antenna apparatus is intended for mobile terminals. In an exemplary implementation, there is an adjusting point is provided, from which a conductor is branched to an adjusting circuit. The adjusting circuit comprises a switch and alternative reactive elements connected to ground, selectable by the switch. When a reactive element is changed, the electric length and resonance frequency of the radiator change, and the corresponding operating band shifts. If the antenna is configured as a dual-band antenna, the above-mentioned operating band is the lower band. One or more higher operating bands are based e.g. on radiating slots implemented by the same radiator conductor. The operating band of the exemplary embodiment of the antenna below the frequency 1 GHz can be shifted in a wider range than in the corresponding known antennas.02-14-2013
20110012800ANTENNA WITH ACTIVE ELEMENTS - A multi-frequency antenna comprising an IMD element, one or more active tuning elements and one or more parasitic elements. The IMD element is used in combination with the active tuning and parasitic elements for enabling a variable frequency at which the antenna operates, wherein, when excited, the parasitic elements may couple with the IMD element to change an operating characteristic of the IMD element.01-20-2011
20130141295MINIATURIZED AND RECONFIGURABLE CPW SQUARE-RING SLOT ANTENNA INCLUDING FERROELECTRIC BST VARACTORS - A coplanar waveguide (CPW) square-ring slot antenna for use in wireless communication systems is miniaturized and reconfigurable by the integration of ferroelectric (FE) BST (barium strontium titanate) thin film varactors therein. The slot antenna device includes a sapphire substrate, top and bottom metal layers, and a thin ferroelectric BST film layer, where the FE BST varactors are integrated at the back edge of the antenna on the top metal layer.06-06-2013
20120013514SYSTEMS AND METHODS FOR EXCITING LONG SLOT RADIATORS OF AN RF ANTENNA - Systems and methods for exciting long slot radiators of an RF antenna are provided. In one embodiment, the invention relates to a radiator transition assembly for exciting a long slot radiator of an antenna, the transition assembly including a folded flexible circuit substrate including at least two folds forming a long slot radiator, an excitation circuitry configured to generate signals for exciting the long slot radiator, and a microstrip transmission line coupled to the excitation circuitry and positioned along the folded flexible circuit substrate, where the microstrip transmission line extends across an opening of the long slot radiator.01-19-2012
Entries
DocumentTitleDate
20080258984Antenna, and wireless module, wireless unit and wireless apparatus having the antenna - In an antenna that has high sensitivity to frequencies of narrow bands and over a wide band and that can be small-sized, and in a wireless module, wireless unit and wireless apparatus using this antenna, the antenna is comprised of a transmission line, and variable capacitance means connected to this transmission line, and the variable capacitance means controls the resonant frequency.10-23-2008
20090121951TUNABLE MICROSTRIP DEVICES - Tunable microstrip devices formed by capacitively coupled conductive strips are disclosed. Device parameters can be tuned by adjusting corresponding lengths of a resonator and a coupling section of the device by connecting one or more auxiliary segments to the conductive strips.05-14-2009
20100073247Antenna Arrangement and Antenna Housing - An antenna arrangement including an antenna occupying at least a first plane; a conductive structure that is isolated from the antenna but is arranged to be parasitically fed by the antenna, the conductive structure having a slot and occupying at least a second plane different to but adjacent the first plane.03-25-2010
20090146890USING COULOMB FORCES TO FORM 3-D RECONFIGURABLE STRUCTURES - Coulomb forces are used to create various metallic shapes within substrates. These shapes are formed by coupling a plurality of substrates together where each substrate contains a metallic pattern. The substrates are assembled together on a mother substrate and the substrates can be positioned either parallel to a planar surface or perpendicular to an edge of the mother substrate. Thus, metallic shapes can be formed that are orthogonal to each other. Such a capability is a desirable feature for antenna construction. The various metal shapes can be used to construct: dipole, patch, Yagi, monopole, bow-tie, meanderline and MIMO antennas. Furthermore, the antenna can be reassembled to adjust the physical dimensions of the antenna while in the consumer product to better match the antenna to a different frequency band.06-11-2009
20100045552ANTENNA DEVICE AND WIRELESS COMMUNICATION APPARATUS - A multi-resonant antenna device having good VSWR characteristics even in the UWB band, and a wireless communication apparatus including the antenna device are provided. The antenna device includes a substrate, an antenna main body surface-mounted at a corner of the substrate, and slits. The antenna device resonates at two different resonance frequencies. The slits are arranged to bring a VSWR value at a frequency between the two resonance frequencies closer to VSWR values at the two resonance frequencies. The slits include capacitive adjustment slit portions and inductive adjustment slit portions. The slits are provided in an area where the density of a current flowing on ground conductor surfaces is highest. The slits are arranged perpendicularly or substantially perpendicularly to a direction of this current. Specifically, the slits are provided near and parallel or substantially parallel to an open end of the radiating electrode portion. The lengths of the slits are set to one-eighth of a wavelength at a frequency corresponding to the highest VSWR value in the range between the two resonance frequencies.02-25-2010
20100045551ANTENNA ASSEMBLIES WITH ANTENNA ELEMENTS AND REFLECTORS - According to various aspects, exemplary embodiments are provided of antenna assemblies. In one exemplary embodiment, an antenna assembly generally includes at least one antenna element having first and second electrical paths. The antenna assembly may also include at least one reflector element spaced-apart from the antenna element for reflecting electromagnetic waves generally towards the antenna element.02-25-2010
20100045550Method And Apparatus For A Tunable Channelizing Patch Antenna - A method and apparatus providing a tunable channelized patch antenna by selectively adjoining one or more radiating element extensions successively to a radiating element of the patch antenna, and adjusting fringe capacitance at active outer edges of the patch antenna.02-25-2010
20100109959MONO- OR MULTI-FREQUENCY ANTENNA - The invention relates to a transmission/reception antenna having one or more given operating frequencies, comprising: at least one metallic member (05-06-2010
20130082888METHOD FOR FABRICATING ANTENNA DEVICE OF MOBILE COMMUNICATION TERMINAL - An antenna device of a mobile communication terminal is provided, the device including at least one radiation pattern and at least one magneto dielectric module or dielectric module installed in a selected position on the radiation pattern to tune one or more resonance frequencies of the radiation pattern according to resonance frequencies required for the terminal The radiation pattern is selected from among one or more radiation patterns fabricated according to a usable frequency band. The one or more radiation patterns each include one or more resonance frequencies. The magneto dielectric module is selected from among one or more magneto dielectric modules fabricated for controlling the one or more resonance frequencies of the one or more radiation patterns. The dielectric module is selected from among one or more dielectric modules fabricated for controlling the one or more resonance frequencies of the one or more radiation patterns.04-04-2013
20130069839ISOLATION ENHANCEMENT BETWEEN PLANAR ANTENNA ELEMENTS - An antenna system for creating mutual radiation isolation between planar antenna elements over a narrow band uses field cancellation. Adjacent planar antenna elements are positioned in a common ground plane within a mobile phone repeater station, A tuned slot element is positioned between the antenna elements and coupled to share ground plane current in. order to maximize cancellation and minimize degradation of the radiation of the antenna elements. The dimensions of the toned slot element are adjusted to obtain lambda/2 resonance, whereby, isolation of more than 10 dB is attained between the antenna elements.03-21-2013
20130088398ANTENNA APPARATUS AND WIRELESS COMMUNICATION DEVICE USING SAME - An antenna device includes an antenna element 04-11-2013
20090267851TUNABLE DUPLEXING ANTENNA AND METHODS - Tunable duplexers and related methods are disclosed for use in communications networks. A tunable radiating duplexer can include a first antenna comprising a first variable capacitor and a second antenna comprising a second variable capacitor.10-29-2009
20130063319METHOD AND REMOTELY ADJUSTABLE REACTIVE AND RESISTIVE ELECTRICAL ELEMENTS - Apparatus and method that includes providing a variable-parameter electrical component in a high-field environment and based on an electrical signal, automatically moving a movable portion of the electrical component in relation to another portion of the electrical component to vary at least one of its parameters. In some embodiments, the moving uses a mechanical movement device (e.g., a linear positioner, rotary motor, or pump). In some embodiments of the method, the electrical component has a variable inductance, capacitance, and/or resistance. Some embodiments include using a computer that controls the moving of the movable portion of the electrical component in order to vary an electrical parameter of the electrical component. Some embodiments include using a feedback signal to provide feedback control in order to adjust and/or maintain the electrical parameter. Some embodiments include a non-magnetic positioner connected to an electrical component configured to have its RLC parameters varied by the positioner.03-14-2013
20100053008ANTENNA HAVING DISTRIBUTED PHASE SHIFT MECHANISM - An antenna is provided. The antenna includes a first antenna element disposed over a ground plane and a second and third antenna element over the ground plane on opposing sides of the first antenna element, said first, second and third antenna elements forming a linear antenna array. The antenna further includes an electrical delay line having first and second conductors extending between the first and second antenna elements and between the first and third antenna elements, a parallel conductive elements disposed in series with each of the first and second conductors, the conductive elements extending away from the first and second conductors in a single direction perpendicular to a predominant axis of the linear array, a tuning substrate extending across the conductive elements of each of the delay lines with a pair of U-shaped conductive elements on opposing ends of the tuning substrate with opposing arms of each of the U-shaped tuning elements capacitively engaging respective, corresponding portions of the tuning stubs of the first and second conductors in a substantially identical manner and an actuator system that advances the tuning substrates transverse to the predominant axis thereby increasing an electrical delay on the second antenna and decreasing the electrical delay of the third antenna by substantially equal values.03-04-2010
20090289862Antenna System and a Method in Connection With an Antenna and an Antenna - The invention relates to an antenna system, which comprises a transmitter component (11-26-2009
20120293384IMPEDANCE TUNING OF TRANSMITTING AND RECEIVING ANTENNAS - The present disclosure relates to impedance tuning of transmitting and receiving antennas.11-22-2012
20090153421METHOD AND SYSTEM FOR AN INTEGRATED ANTENNA AND ANTENNA MANAGEMENT - Aspects of a method and system for an integrated antenna and antenna management are provided. In this regard, one or more reactances coupled to an antenna in a hybrid circuit may be tuned and signals may be transmitted and/or received based on the tuning. The hybrid circuit may comprise an integrated circuit (IC) bonded to a multi-layer package. The antenna may be embedded within and/or on the multi-layer package. The reactances may be within and/or on the IC and/or the multi-layer package. In this regard, the IC may be bonded to or mounted to an underside of the multi-layer package. The reactances may be tuned via one or more switching elements and/or logic, circuitry, and/or code within the IC. The reactances may comprise one or more inductors and/or capacitor arrays. The multi-layer package may comprise one or more layers of ferromagnetic and/or ferrimagnetic material.06-18-2009
20090146891Method and Related Electronic Device for Adjustment of a Radio Frequency Circuit by Impedance Loading Features - A method for adjustment of a radio-frequency circuit by impedance loading features includes designing a plurality of test fixtures each corresponding to an impedance loading area according to a predefined operating frequency band, coupling each of the plurality of test fixtures to a test point of the radio-frequency circuit for measuring a plurality of radio-frequency characteristic sets, determining an optimal impedance loading area of the radio-frequency circuit according to the plurality of radio-frequency characteristic sets, and adjusting the radio-frequency circuit according to the optimal impedance loading area.06-11-2009
20090146892NON-CONTACT WIRELESS COMMUNICATION APPARATUS, METHOD OF ADJUSTING RESONANCE FREQUENCY OF NON-CONTACT WIRELESS COMMUNICATION ANTENNA, AND MOBILE TERMINAL APPARATUS - A non-contact wireless communication apparatus and a mobile terminal apparatus are provided. The non-contact wireless communication apparatus includes a non-contact wireless communication antenna, a resonance capacitor, connected in parallel with the non-contact wireless communication antenna, for obtaining a predetermined resonance frequency with the non-contact wireless communication antenna, a resonance frequency adjustment unit for changing a resonance capacitance of the resonance capacitor to adjust the resonance frequency, a capacitance change amount control unit for controlling a change in resonance capacitance of the resonance capacitor in the resonance frequency adjustment unit, a resonance frequency shift unit for shifting the resonance frequency of the non-contact wireless communication antenna, and on/off control unit for performing on/off control of the resonance frequency shift unit in accordance with the amount of change in resonance capacitance of the resonance capacitor by the capacitance variation control unit.06-11-2009
20110148723Tunable Antenna Arrangement - An antenna arrangement including an antenna; a first variable impedance circuit connected between ground and a first point of the antenna; and a second variable impedance circuit connected between ground and a second point of the antenna and a connection from a third point of the antenna to ground wherein; the first point of the antenna and the second point of the antenna are separated along the length of the antenna and the impedance of the first variable impedance circuit and the second variable impedance circuit control the resonant frequency of the antenna arrangement.06-23-2011
20090278755ANTENNA DEVICE AND COMMUNICATION TERMINAL - An antenna device includes: an antenna element that transmits or receives wireless signals in a predetermined first frequency band and in a second frequency band higher in frequency than the first frequency band; a feeding terminal portion; a first bandwidth adjustment circuit that includes a first capacitor for widening a bandwidth of the first frequency band to a predetermined bandwidth, the capacitance of the first capacitor being set at a predetermined value in accordance with the predetermined bandwidth; and a second bandwidth adjustment circuit that includes second and third capacitors and a first inductor for widening a bandwidth of the first frequency band to the predetermined bandwidth, the capacitance of each of the second and third capacitors and the inductance of the first inductor being respectively set at predetermined values in accordance with the predetermined bandwidth.11-12-2009
20090262034ANTENNA MATCHING UNIT AND HIGH-FREQUENCY RECEIVING UNIT INCLUDING THE SAME - An antenna matching unit includes an antenna matching device to which a first high-frequency signal and a second high-frequency signal with a frequency higher than that of the first high-frequency signal are input; an active element to which an output signal from the antenna matching device is connected; and an output terminal to which an output from the active element is connected. The antenna matching device includes a signal line placed between the input and output; a series-connected element composed of a capacitor and inductor connected between the signal line and the ground; a capacitor connected in parallel with the inductor; and a control terminal for changing the capacitance value of the capacitor. The parallel resonance frequency between the inductor and capacitor is set to the frequency of the second high-frequency signal to reduce matching loss between the antenna and the tuner unit.10-22-2009
20080278392EXTREMELY MINIATURIZED DIGITAL ANTENNA HAVING SWITCHABLE MULTIPLE BANDWIDTHS - An extremely miniaturized digital TV signal reception antenna built in a mobile device includes a substrate, an antenna unit and a switch unit. The substrate is provided with a plate having a grounding metallic surface and a first clearance surface. A second clearance surface is provided on the same side of the grounding metallic surface with a metallic microstrip line for electrically connecting to an output end of the switch unit. Input ends of the switch unit are electrically connected with a plurality of leads of the first clearance surface. The other ends of the plurality of leads are electrically connected with the antenna unit. Finally, when a tuner of a portable digital television switches the channels, signals of the switched channel are simultaneously output to the switch unit. According to the frequency of that channel, the switch unit automatically switches to a suitable range of bandwidth for receiving the digital TV signals, thereby performing the reception of the digital TV signals.11-13-2008
20080316129Transponder Tuning Method and a Transponder - Tuning an antenna circuit that includes an inductance of a resonance circuit, and a component having a component impedance. The antenna circuit includes multiple connection areas for connecting the component to the antenna circuit. At least two of the multiple of connection areas are part of the resonance circuit. The tuning can be performed by selecting at least one connection area for the component among the at least two of the multiple connection areas.12-25-2008
20130120200MULTI LEVELED ACTIVE ANTENNA CONFIGURATION FOR MULTIBAND MIMO LTE SYSTEM - An active antenna system and algorithm is described that provides for dynamic tuning and optimization of antenna system parameters for a MIMO system where correlation and isolation between antennas in the system are dynamically altered to provide for greater throughput. As one or multiple antennas are loaded or de-tuned due to environmental changes, corrections to correlation and/or isolation are made by selecting the optimal antenna radiation pattern and by adjusting electrical length and/or reactive loading of transmission lines connecting the antennas. Multiple Isolated Magnetic Dipole (IMD) antennas are co-located and connected with a feed network that can include switches that adjust phase length for transmission lines connecting the antennas. Filtering is integrated into the feed network to improve rejection of unwanted frequencies. Filtering can also be implemented on the antenna structure.05-16-2013
20090051610TUNABLE ANTENNA MODULE WITH FREQUENCY CORRECTION CIRCUIT AND MANUFACTURING METHOD THEREOF - A tunable antenna module with frequency correction circuit having an antenna element, a variable capacity means connected to the antenna element, and a frequency control source that generates a controlling voltage for varying the capacity of the variable capacity means to vary a tuning frequency according to the frequency of radio wave received by the antenna element. The module further has a voltage divider circuit comprised of resisters for dividing the controlling voltage, and connected between the frequency control source and the variable capacity means. The tuning frequency is corrected by the voltage divider circuit.02-26-2009
20100060534ANTENNA DEVICE - An antenna device includes a reflector plate, plane conductors, an antenna element, variable impedance elements, control wires and linear conductors. The plane conductors are arranged regularly on a plane which is parallel to the reflector plate. The antenna element is set on the plane, to be parallel to the reflector plate. The variable impedance elements provide a directivity to the antenna element, the directivity is radiating a wave strongly to a particular direction. Each control wire supplies a control signal to each of the variable impedance elements. Each linear conductor connects each of some plane conductors with the reflector plate. Moreover, each of the other plane conductors is connected to the reflector plate through a portion of each control wire instead of the linear conductor.03-11-2010
20080309567Hand Held Reader Antenna for RFID and Tire Pressure Monitoring System - An antenna assembly that has particular application for a hand held reader that interrogates sensors embedded within a vehicle tire, such as RFID sensors and tire pressure sensors. In one embodiment, the antenna assembly includes a first antenna operating in the 432-435 MHz range that employs a meander-line slot that provides increased antenna cross-polarization so that the sensor can be interrogated regardless of the antenna orientation and polarization. The antenna assembly also includes two RFID antennas that operate in the 902-928 MHz range that are planar antenna that make the antenna bi-directional, polarization free and a wide enough bandwidth for the RFID interrogation.12-18-2008
20090315793Electronic device, antenna thereof, and method of forming the antenna - The antenna of the invention includes a transceiver unit and a dielectric unit. The transceiver unit has a ground portion, a radial portion, a conductive portion and a feed portion. The ground portion and the radial portion are disposed apart in parallel, so as to form a space therebetween. The distance between the ground portion and the radial portion is defined as a transceiver unit height. The dielectric unit is disposed in the space. That is, the dielectric unit is disposed between the ground portion and the radial portion. The dielectric unit has a dielectric unit thickness less than the transceiver unit height. In one embodiment, the ratio of the dielectric unit thickness to the transceiver unit height is preferably between 0.4 and 0.7.12-24-2009
20090115674ANTENNA DEVICE AND WIRELESS COMMUNICATION APPARATUS - An antenna device and a wireless communication apparatus that are capable of obtaining a plurality of resonant frequencies and varying the plurality of resonant frequencies over a wide range are provided. A first antenna unit of an antenna device includes a feed electrode, a first radiation electrode, and a first frequency-variable circuit. The first frequency-variable circuit includes first and second reactance circuits each including a variable-capacitance diode. A control voltage is applied to the first frequency-variable circuit, and the resonant frequency of the first antenna unit can thus be varied. A second antenna unit includes the feed electrode, a second radiation electrode, and a second frequency-variable circuit. The second frequency-variable circuit includes first and third reactance circuits each including a variable-capacitance diode. A control voltage is applied to the second frequency-variable circuit, and the resonant frequency of the second antenna unit can thus be varied.05-07-2009
20090079643DUAL-BAND ANTENNA - A dual-band antenna has a first meandering portion, a second meandering portion and a connection portion defining two ends. The first meandering portion and the second meandering portion have different length. One end of the first meandering portion connects one end of the second meandering portion. The other end of the first meandering portion connects one end of the connection portion. The other end of the second meandering portion connects a feeding portion. The other end of the connection portion connects a ground portion. The feeding portion, the second meandering portion, the first meandering portion and the connection portion obtain an electrical resonance corresponding to a first frequency range. The second meandering portion obtains an electrical resonance corresponding to a second frequency range.03-26-2009
20110102282RECONFIGURABLE MULTI-BAND ANTENNA SYSTEM AND ELECTRONIC APPARATUS HAVING THE SAME - A reconfigurable multi-band antenna system has a signal transmission metal, a ground metal, at least two resonators, and at least two switches. The signal transmission metal and the ground metal respectively act as a signal feed-in end and a ground end and of the reconfigurable multi-band antenna system. The at least two resonators are disposed on at least one side of the transmission metal line. Each switch is coupled to the at least two resonators or one of them. Each switch has a control end, and independently and respectively receives one of the at least two control signals, wherein the at least two control signals respectively and independently the short and open of the switches. The at least two resonators form a resonator configuration of a semi-close resonating configuration or a close resonating configuration, and generates a signal within a frequency according to the resonator configuration.05-05-2011
20090040123FREQUENCY RECONFIGURATION ARRAY ANTENNA AND ARRAY DISTANCE CONTROL METHOD - A frequency reconfiguration array antenna includes a first metal plate, and a first antenna element formed on the first metal plate and reconfiguring a frequency. An array antenna includes a second metal plate and a second antenna element formed on the second metal plate and reconfiguring a frequency. Further, the array antenna includes a connection plate being bent to connect the first metal plate and the second metal plate, and being bent to change the distance between the first metal plate and the second metal plate according to the frequency of the first and second antenna elements.02-12-2009
20110032165ANTENNA WITH MULTIPLE COUPLED REGIONS - An antenna having a driven element coupled to multiple additional elements to resonate at multiple frequencies. A magnetic dipole mode is generated by coupling a driven element to a second element, and additional resonances are generated by coupling additional elements to either or both of the driven or second element. One or multiple active components can be coupled to one or more of the coupled elements to provide dynamic tuning of the coupled or driven elements.02-10-2011
20090109106SURFACE-MOUNT ANTENNA AND ANTENNA DEVICE - A ground electrode is formed on the lower surface of a ferroelectric substrate, a control electrode including capacitor electrodes and an inductor electrode is formed on the upper surface of the ferroelectric substrate, and an upper-surface radiating electrode and an end-surface radiating electrode are formed on a paraelectric substrate. The shapes and dimensions of the ferroelectric substrate, paraelectric substrate, and radiating electrodes are determined such that when the ferroelectric substrate and the paraelectric substrate are stacked in layers, a circuit including the radiating electrodes resonates at frequencies outside a frequency band exhibiting frequency dispersion of a dielectric constant.04-30-2009
20130135162ANTENNA SYSTEM FOR INTERFERENCE SUPRESSION - An antenna system is capable of optimizing communication link quality with one or multiple transceivers while suppressing one or multiple interference sources. The antenna provides a low cost, physically small multi-element antenna system capable of being integrated into mobile devices and designed to form nulls in the radiation pattern to reduce interference from unwanted interferers. The antenna system operates in both line of sight and high multi-path environments by adjusting the radiation pattern and sampling the received signal strength to reduce signal levels from interferers while monitoring and optimizing receive signal strength from desired sources.05-30-2013
20130135163ACTIVE MIMO ANTENNA CONFIGURATION FOR MAXIMIZING THROUGHPUT IN MOBILE DEVICES - An active antenna system and algorithm is proposed that provides for dynamic tuning and optimization of antenna system parameters for a MIMO system that will provide for greater throughput. As one or multiple antennas are loaded or de-tuned due to environmental changes, corrections to correlation and/or isolation are made by tuning the active antenna. A null-steering technique is implemented to alter the near-field and far-field characteristics to aid in modifying correlation and isolation in the multi-antenna system.05-30-2013
20110128200ANTENNA AND RADIO COMMUNICATION APPARATUS - An antenna includes a first arm whose one end is connected to a feeding unit, a second arm whose one end is connected to the first arm at a position that is away from the one end of the first arm and whose other end is connected to ground, and a variable impedance unit whose impedance is variable, provided between the ground and the other end of the first arm.06-02-2011
20130141294Active Antennas for Multiple Bands in Wireless Portable Devices - Wireless devices, and particularly mobile devices such as cellphones, PDAs, computers, navigation devices, etc., as well as other devices which transmit or receive data or other signals at multiple frequency bands utilize at least one antenna to transmit and receive and a plurality of different bands (e.g., GSM cellular communication band; Bluetooth short range communication band; ultrawideband (UWB) communications, etc.). These wireless devices can simultaneously transmit or receive at a plurality of different bands, or simultaneously transmit and receive at different bands. The wireless devices have the ability to use a single physical structure (e.g., an antenna) for transmission and reception of many different bands. The antenna can be either actively tuned or passively tuned using one or more elements.06-06-2013
20130147672MODAL ANTENNA WITH CORRELATION MANAGEMENT FOR DIVERSITY APPLICATIONS - Antenna systems comprising modal antennas for use in diversity and similar schemes include a modal antenna capable of multiple antenna modes wherein a distinct radiation pattern exists for each antenna mode, and a control signal for directing variation of the antenna modes. Methods for designing modal diversity antennas are further disclosed.06-13-2013
20100039337ELECTROMAGNETIC FIELD GENERATION ANTENNA FOR A TRANSPONDER - An antenna generating an electromagnetic field for an electromagnetic transponder and a terminal provided with such an antenna. The antenna comprises a first inductive element designed to be connected to two terminals employing an energizing voltage, and a parallel resonant circuit coupled with the first inductive element.02-18-2010
20100053007TUNABLE DUAL-BAND ANTENNA USING LC RESONATOR - An Inverted-F antenna (IFA) includes a tunable parallel LC resonator physically inserted between two antenna bodies of the IFA structure. The LC resonator is comprised of a tunable capacitor C03-04-2010
20110254748ANTENNA AND METHOD FOR STEERING ANTENNA BEAM DIRECTION - An antenna comprising an IMD element, and one or more parasitic and active tuning elements is disclosed. The IMD element, when used in combination with the active tuning and parasitic elements, allows antenna operation at multiple resonant frequencies. In addition, the direction of antenna radiation pattern may be arbitrarily rotated in accordance with the parasitic and active tuning elements.10-20-2011
20110260940MOBILE ELECTRONIC DEVICE - A mobile electronic device comprises an RFID antenna section that sends and receives signals on a first useful frequency band, a main antenna section that sends and receives signals on a second useful frequency band, which is a higher frequency band than the first useful frequency band, an adjustment section that adjusts a resonance frequency of the RFID antenna section, and a control section that identifies a reactance value of the RFID antenna section based on the receiving sensitivity with respect to signals on the first useful frequency band and adjusts the resonance frequency of the RFID antenna section based on the identified reactance value by an adjustment section such that a high-order resonance frequency of the RFID antenna section is spaced apart from the second useful frequency band.10-27-2011
20110134003ANTENNA DEVICE - An antenna device includes an antenna unit, a power supply terminal and a time constant circuit. The antenna unit includes an antenna element and a variable capacitance element that is variable in capacitance in accordance with a voltage applied to the variable capacitance element, and resonates in such a manner that the antenna element and the variable capacitance element cooperate with each other. The power supply terminal supplies the voltage applied to the variable capacitance element. The time constant circuit gradually increases the voltage applied to the variable capacitance element when a voltage applied to the power supply terminal is changed from an off state to an on state.06-09-2011
20110001676ACTIVE TUNED LOOP-COUPLED ANTENNA - An active tuned loop-coupled antenna capable of optimizing performance over incremental bandwidths and capable of tuning over a large total bandwidth to be used in wireless communications. The active loop is capable of serving as the radiating element or a radiating element can be coupled to this active loop. Multiple active tuned loops can be coupled together to extend the total bandwidth of the antenna. Active components can be incorporated into the antenna structure to provide yet additional extension of the bandwidth along with increased optimization of antenna performance over the frequency range of the antenna.01-06-2011
20100194652ANTENNA STRUCTURE WITH AN EFFECT OF SERIALLY CONNECTING CAPACITANCES - In an antenna structure having an effect of serially connecting capacitances, mainly a metallic planar antenna is provided thereon at least with a first metallic plane board, and a second metallic plane board being close to but not connected to the first metallic plane board to form the effect of serially connecting capacitances. And more, the antenna structure further has an extension arm extended from the antenna or the second metallic plane board made from a microstrip, and can be optionally grounded or not grounded, for the purpose of adjusting the impedance value of the antenna structure.08-05-2010
20100026596ANTENNA DEVICE - The antenna device includes a ground plane 02-04-2010
20090102732ANTENNA WITH SERIES STUB TUNING - An antenna may include a conductive material formed in a pattern on an antenna housing, where one end of the conductive material connects to a ground connection. The antenna may further include a tuning stub, having a length (l04-23-2009
20120038528TUNABLE ANTENNA STRUCTURE HAVING A VARIABLE CAPACITOR - A tunable antenna structure having a variable capacitor includes a substrate, a first metal strip, a second metal strip and a third metal strip formed on the substrate, a variable capacitor element located between the first metal strip and the second metal strip, an inductor element located between the second metal strip and the third metal strip, a first capacitor element located between the first metal strip and the third metal strip, and a second capacitor element located on the third metal strip.02-16-2012
20100127945Apparatus for compensation of the impedance and the load phase of the antenna element - An apparatus including an antenna element having an impedance and a load phase; a phase shifter coupled to the antenna element; and a controller for controlling, in response to a change in a context of the apparatus, the phase shifter to compensate for a consequent change in the impedance and the load phase of the antenna element.05-27-2010
20120112973ANTENNA OF RESONANCE FREQUENCY VARIABLE TYPE - The present invention relates to a resonance frequency variable type antenna which has as low operating frequency as mobile broadcasting service bands of T-DMB and DVB-H and a wide frequency bandwidth and can select and receive various channels using a loop antenna capable of varying a resonance frequency through a variable capacitor. Particularly, the resonance frequency variable antenna can be mounted in a limited space, use two different service bands (T-DMB and DVB-H) and independently operate for the two service bands to achieve high-quality mobile broadcasting services. Accordingly, various mobile broadcasting services can be provided using a single antenna and the product values and reliabilities of the resonance frequency variable type antenna of the invention and mobile terminals including the resonance frequency variable antenna of the invention can be improved.05-10-2012
20120127047Internal FM Antenna - An antenna for receiving and/or transmitting radio frequency signals in a predetermined frequency band, the antenna comprising: a first antenna portion comprising at least one conducting loop about a first material having an initial permeability of at least 4; and a second antenna portion embedded within a second material having a dielectric constant of at least 4; wherein the first and second antenna portions are electrically coupled together so as to form a compound antenna having a size such that the diameter of the smallest sphere which encloses all of the first and second antenna portions of the compound antenna is less than 1/30 of the wavelength of the radio frequency signals at the centre of the predetermined frequency band.05-24-2012
20120162037MOUNTING ELECTRONIC COMPONENTS ON AN ANTENNA STRUCTURE - A method and apparatus for mounting electronic components on an antenna structure includes at least one conductive antenna element 06-28-2012
20110205133NON-CONTACT COMMUNICATION DEVICE - A problem of the invention is to provide a non-contact communication device capable of conducting non-contact communication even when a control section cannot be operated a drop in a battery voltage or a reset. A memory element (08-25-2011
20120139803ANTENNA, ADJUSTMENT METHOD THEREOF, AND ELECTRONIC DEVICE IN WHICH THE ANTENNA IS IMPLEMENTED - An antenna used in wireless communication, comprises: a dielectric substrate; a ground conductor portion arranged upon the dielectric substrate; an antenna element including a radiating conductor portion arranged upon the dielectric substrate opposite to the ground conductor portion, a shorted conductor portion that connects the radiating conductor portion and the ground conductor portion, and a power supply unit adapted to supply a high-frequency current to the radiating conductor portion; and an open conductor portion connected at high frequencies to the ground conductor portion, wherein the open conductor portion is connected to the dielectric substrate so as to protrude by a predetermined length from the location of the ground conductor portion in a diagonal direction from the location where the ground conductor portion and the shorted conductor portion are connected.06-07-2012
20110156972LOOP RESONATOR APPARATUS AND METHODS FOR ENHANCED FIELD CONTROL - A radiating antenna element intended for portable radio devices and methods for designing manufacturing the same. In one embodiment, a loop resonator structure for enhanced field (e.g., electric field) is provided, the resonator having an inductive and a capacitive element forming a resonance in a first frequency band. The loop resonator structure is disposed substantially on the ground plane, thereby altering electrical energy distribution. The location of the resonant element is selected to reduce electric field strength proximate to one or more sensitive components, such as a mobile device earpiece, thereby improve hearing aid compliance. Capacitive tuning of the resonator, and the use of multiple resonator structures on the same device, are further described.06-30-2011
20120242551CIRCUIT CAPABLE OF AUTOMATICALLY CALIBRATING A RESONANCE FREQUENCY OF AN ANTENNA AND METHOD THEREOF - A circuit capable of automatically calibrating a resonant frequency of an antenna includes the antenna, a switch, a conversion unit, a count comparator, and a capacitor array. The switch is coupled to the antenna for being turned on and turned off according to a pulse. The antenna is used for generating the resonant frequency according to on and off of the switch. The conversion unit is coupled to the antenna for generating a clock according to a signal with the resonant frequency. The count comparator is coupled to the conversion unit for counting a number generated by a reference clock during a period of the clock, and comparing the pulse number with a predetermined value to generate an adjustment signal. The capacitor array is used for adjusting capacitance of the capacitor array according to the adjustment signal.09-27-2012
20120242550REMOTELY ADJUSTABLE REACTIVE AND RESISTIVE ELECTRICAL ELEMENTS AND METHOD - Apparatus and method that includes providing a variable-parameter electrical component in a high-field environment and based on an electrical signal, automatically moving a movable portion of the electrical component in relation to another portion of the electrical component to vary at least one of its parameters. In some embodiments, the moving uses a mechanical movement device (e.g., a linear positioner, rotary motor, or pump). In some embodiments of the method, the electrical component has a variable inductance, capacitance, and/or resistance. Some embodiments include using a computer that controls the moving of the movable portion of the electrical component in order to vary an electrical parameter of the electrical component. Some embodiments include using a feedback signal to provide feedback control in order to adjust and/or maintain the electrical parameter. Some embodiments include a non-magnetic positioner connected to an electrical component configured to have its RLC parameters varied by the positioner.09-27-2012
20130169493Tunable Microwave Devices with Auto-Adjusting Matching Circuit - An embodiment of the present disclosure provides a variable impedance circuit including an antenna having a tunable component. The tunable component can be operable to receive a variable signal to cause the tunable component to change an impedance of the antenna. The tunable component can include a first conductor coupled to the antenna, a second conductor, and a tunable material positioned between the first conductor and the second conductor, where at least one of the first conductor or the second conductor, or both are adapted to receive the variable signal to cause the change in the impedance of the antenna. Additional embodiments are disclosed.07-04-2013
20130113667ANTENNA AND METHOD FOR STEERING ANTENNA BEAM DIRECTION - An antenna comprising an IMD element and one or more parasitic and active tuning elements is disclosed. The IMD element, when used in combination with the active tuning and parasitic elements, allows antenna operation at multiple resonant frequencies. In addition, the direction of antenna radiation pattern may be arbitrarily rotated in accordance with the parasitic and active tuning elements.05-09-2013
20130093634MULTI-BAND MIMO ANTENNA - A multi-band antenna system for MIMO applications is adapted to provide high isolation between antennas across a wide range of frequencies. Multiple Isolated Magnetic Dipole (IMD) antennas are co-located and connected with a feed network that can include switches that adjust phase length for transmission lines connecting the antennas. Filtering is integrated into the feed network to improve rejection of unwanted frequencies. Filtering can also be implemented on the antenna structure. Either one or multi-port antennas can be used.04-18-2013
20130113666CAPACITIVELY COUPLED COMPOUND LOOP ANTENNA - A compound loop antenna (CPL) is described that includes a capacitively fed magnetic loop and/or a capacitively fed electric field radiator. Embodiments include single-band CPL antennas and multi-band CPL antennas. The CPL antennas have been reduced in physical size by capacitively feeding the loop and/or radiator. The embodiments include at least one e-field radiation element that is capacitively coupled or not capacitively coupled, at least one magnetic loop element that is capacitively coupled. A continuation of the magnetic loop may be continued with either a wire or a connection to a second layer.05-09-2013
20130141291ANTENNA ARRANGEMENTS FOR COVERING FREQUENCY BANDS - An exemplary embodiment of an antenna arrangement generally includes a board including a ground plane, a radiating element, and a first parasitic element. The radiating element is dimensioned for providing resonance at a first frequency. The radiating element is arranged at a first edge of the board. The first parasitic element is arranged at a second edge of the board opposite the first edge. The first parasitic element is dimensioned for providing resonance at another frequency near the first frequency for providing coverage of a first frequency band. A major extension of the first parasitic element is along the second edge of the board.06-06-2013
20080198078Adjusting Resonance Frequency by Adjusting Distributed Inter-Turn Capacity - The invention concerns a method for adjusting frequency tuning of a resonant circuit with turns having a regular spacing generating stray inter-turn capacity. The adjusting of the frequency tuning of the resonant circuit is performed, at the level of the stray inter-turn capacity, by varying the regular spacing of adjacent turns on at least one zone of the antenna. The invention uses this adjusting method for producing an adjusted antenna for a resonant circuit, the resonant circuit and a non-contact product. The invention concerns a device programmed for antenna production and/or definition.08-21-2008
20130141293SUPERIMPOSED MULTIMODE ANTENNA FOR ENHANCED SYSTEM FILTERING - In a typical system a combination of filters (BAW, SAW, etc) and an antenna are configured to achieve frequency filtering effect and efficient transmission and reception of communication signals. Wireless communication systems require specific bandwidth and out-of-band rejection; typically this metric is characterized in frequency roll-off in units of dB/MHz. This number is distributed between the antenna and filter, with the antenna contributing little to date to the filtering effect. Loss and cost penalties are incurred when multi-mode systems are designed which require additional rejection from the filter elements. Described here is a method of designing antennas to reduce the amount of rejection and complexity from the filter system. A superposition of a symmetrical frequency response from the antenna structure coupled with a non-symmetrical frequency response from a counterpoise structure generates increased rejection of out-of-band components.06-06-2013
20130141292MULTI-ANTENNA MODULE CONTAINING ACTIVE ELEMENTS AND CONTROL CIRCUITS FOR WIRELESS SYSTEMS - An antenna system is provided for use in wireless communication, the antenna system is contained in a modular structure. The antenna system includes a plurality of co-located antennas, including at least one active modal antenna, each of the antennas being adapted for operation at a distinct frequency band. The antenna system further includes an active tuning module for tuning a frequency response of the co-located antennas.06-06-2013
20100309069METHOD AND SYSTEM FOR DYNAMIC CONTROL OF OUTPUT POWER OF A LEAKY WAVE ANTENNA - Methods and systems for dynamic control of output power of a leaky wave antenna (LWA) are disclosed and may include configuring one or more LWAs in a wireless device to transmit RF signals at a desired frequency. The LWAs may be integrated in support structures, including an integrated circuit, an integrated circuit package, and/or a printed circuit board. Impedances that are coupled to the LWAs and to a power amplifier enabled to amplify the RF signals may be dynamically configured. A resonant frequency of the LWAs may be tuned, which may be configured to transmit the RF signals at a desired angle from a surface of the support structure. The LWAs may include microstrip or coplanar waveguides where a cavity height of the LWAs may be configured by controlling spacing between conductive lines in the waveguides. The impedances may include capacitor arrays and/or inductors in the support structures.12-09-2010
20120274524METAMATERIAL RECONFIGURABLE ANTENNAS - Leaky wave antennas that can be reconfigured in pattern and/or polarization by exploiting the characteristic of metamaterial structures loaded with variable capacitor and inductors employ a Composite Right Left Handed (CRLH) unit cell with two independent DC biases used to actively change the group delay of the transmission line and the polarization of the radiated field while preserving good impedance matching. Different degrees of pattern and polarization reconfigurability are achieved by cascading multiple of these unit cells along a straight line, a circular line or a zigzag line while preserving high gain for all the antenna configurations and good impedance matching.11-01-2012
20120274523ANTENNA ASSEMBLY UTILIZING METAL-DIELECTRIC RESONANT STRUCTURES FOR SPECIFIC ABSORPTION RATE COMPLIANCE - An wireless communication device has a housing with an exterior surface that is designed to face a user when the wireless communication device is transmitting a radio frequency signal. The communication device includes an antenna disposed inside the housing for emitting a radio frequency signal. A metal-dielectric structure resonates to reflect the radio frequency signal. The metal-dielectric structure is located between the antenna and the exterior surface at a position wherein he metal-dielectric structure traps and reflects the radio frequency signal thereby reducing a specific absorption rate of the wireless communication device.11-01-2012
20120274522MULTIPLE ANTENNA ASSEMBLY UTILIZING ELECTRO BAND GAP ISOLATION STRUCTURES - A multiple antenna assembly with high isolation between the antennas is disclosed. The assembly includes a dielectric substrate with a ground plane and first and second antennas thereon. One or more metal-dielectric isolation structures are on the substrate at locations at which an electric current is present that has a current density greater than a predefined threshold. Each metal-dielectric isolation structure resonates at a given frequency that inhibits mutual signal coupling between the first and second antennas. Various configurations, such as concentric ring patterns, for the metal-dielectric isolation structures are disclosed. A device can be provided to dynamically tune the given frequency of the metal-dielectric isolation structures to correspond to radio frequency signals emitted by the first and second antennas.11-01-2012
20130154888Tunable antenna and Related Radio-Frequency Device - A tunable antenna is disclosed. The tunable antenna includes a ground element for providing grounding, a signal feed-in terminal, a radiation unit electrically connected to the signal feed-in terminal and including a long side extended from the signal feed-in terminal along a first direction, a short side extended from the signal feed-in terminal along a second direction, and a branch electrically connected between the signal feed-in terminal and the ground element, a coupling unit for coupling to the long side, and a switch unit for connecting or disconnecting the coupling unit to/from the ground element to change a coupling relationship between the coupling unit and the long side, such that the tunable antenna respectively operates in a first frequency band and a second frequency band.06-20-2013
20130154889ACTIVE FRONT END MODULE USING A MODAL ANTENNA APPROACH FOR IMPROVED COMMUNICATION SYSTEM PERFORMANCE - This application describes a dynamically tuned front end module using a modal antenna approach for improved communication system performance. The front end module consists of power amplifiers, filters, switches and antennas along with tuning circuits integrated and controlled to provide an optimized system for RF transmission. Dynamic tuning provides the ability to maintain optimized system performance for a wide variety of use cases and environments that the wireless device is operated in. Several transmission modes are accessed in an algorithm to optimize the performance of multiple wireless devices in a cellular system, to include a power conservation mode, emergency transmission mode, and cell capacity optimization mode. Dynamic adjustment of correlation and isolation between multiple antennas is a benefit provided by this front end topology.06-20-2013
20120280870SYSTEM AND METHOD FOR A DYNAMIC LIQUID CORE PATCH ANTENNA AND BROADBAND FREQUENCY AGILITY - An exemplary embodiment of the present invention provides a tunable liquid core patch antenna comprising a top-side patch, a ground plane, and a liquid core substrate positioned substantially between the top-side patch and the ground plane. The liquid core substrate can comprise a first liquid having a first dielectric constant and a second liquid having a second dielectric constant greater than the first dielectric constant. The first liquid and second liquid can form a mixture having an effective dielectric constant greater than the first dielectric constant and less than the second dielectric constant.11-08-2012
20130194144MULTI-RESONANCE TUNABLE ANTENNA - Disclosed is a multi-resonance tunable antenna having a plurality of variable resonance points. The multi-resonance tunable antenna includes at least two branch lines and at least two capacitors. The at least two branch lines branch from a branch point of a basic line, which is connected to a filter used to receive wireless signals, in different directions. The at least two capacitors are connected between the at least two branch lines and a grounding terminal.08-01-2013
20100013725NORMALLY OPEN AND NORMALLY CLOSED RF MEMS SWITCHES IN A MOBILE COMPUTING DEVICE AND CORRESPONDING METHOD - A mobile computing device and corresponding method are disclosed. The mobile computing device includes an RF MEMS switch circuit including at least one normally open RU MEMS switch and a normally closed RU MEMS switch and a controller connected to the RU MEMS switch circuit. The RU MEMS switch circuit applies a default condition to the mobile computing device through the normally closed RU MEMS switch, and the controller causes application of control signals to one of the at least one normally open RU MEMS switches and to the normally closed RU MEMS switch to apply an alternate condition to the mobile computing device instead of the default condition.01-21-2010
20130201067Tunable Antenna System - An electronic device antenna may be provided with an antenna ground. An antenna resonating element may have a first end that is coupled to the ground using an inductor and may have a second end that is coupled to a peripheral conductive housing member in an electronic device. The peripheral conductive housing member may have a portion that is connected to the ground and may have a portion that is separated from the ground by a gap. The gap may be bridged by an inductor that couples the second end of the antenna resonating element to the antenna ground. The inductor may be bridged by a switch. A tunable circuit such as a capacitor bridged by a switch may be interposed in the antenna resonating element. The switches that bridge the gap and the capacitor may be used in tuning the antenna.08-08-2013
20130099987MULTI-FUNCTION ARRAY FOR ACCESS POINT AND MOBILE WIRELESS SYSTEMS - A multi-function array is described where several communication system functions are realized using the same antenna architecture. An array of antenna elements where each antenna element can generate multiple radiation patterns is described; the multiple radiation patterns from each antenna element provides increased capability and flexibility in generating a phased array, a MIMO antenna system, a receive diversity antenna system, as well as direction finding feature by way of an interferometer function provided by one or multiple elements. The small volume attributes of the antenna elements populating the array lend this technique to mobile wireless devices as well as access points.04-25-2013
20130093635MODAL ADAPTIVE ANTENNA USING PILOT SIGNAL IN CDMA MOBILE COMMUNICATION SYSTEM AND RELATED SIGNAL RECEIVING METHOD - One or more input signals are used to generate a Pseudo noise generator and re-inject the signal to obtain a more efficient method of control of a receiver using adaptive antenna array technology. The antenna array automatically adjusts its direction to the optimum using information obtained from the input signal by the receiving antenna elements. The input signals may be stored in memory for retrieval, comparison and then used to optimize reception. The difference between the outputs of the memorized signals and the reference signal is used as an error signal.04-18-2013

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