Patent application number | Description | Published |
20100225414 | MULTI-CHANNEL RADIO FREQUENCY FRONT END CIRCUIT WITH FULL TRANSMIT AND RECEIVE DIVERSITY FOR MULTI-PATH MITIGATION - A front end circuit for coupling a plurality of antennas to a multi-channel time domain duplex RF transceiver is disclosed. The front end circuit has a first transmit port, a first receive chain primary port, a first receive chain secondary ports, and a first antenna port connectable to a first one of the plurality of antennas. The front end circuit also has a second transmit port, a second receive chain primary port, and a second receive chain secondary port connectable to a second one of the plurality of antennas. A first switch has terminals connected to the first transmit port, the first receive chain primary port, and the second receive chain secondary port, as well as a common terminal that is connected to the first antenna port. Additionally, the front end circuit has a second switch that has terminals connected to the second transmit port, the second receive chain primary port and the first receive chain secondary port, and a common terminal connected to the second antenna port. | 09-09-2010 |
20100226292 | MULTI-CHANNEL RADIO FREQUENCY FRONT END CIRCUIT WITH FULL RECEIVE DIVERSITY FOR MULTI-PATH MITIGATION - A front end circuit for coupling a plurality of antennas to a multi-channel time domain duplex RF transceiver is disclosed. The front end circuit has a first transmit port, a first receive chain primary port, a first receive chain secondary ports, and a first antenna port connectible to a first one of the plurality of antennas. The front end circuit also has a second transmit port, a second receive chain primary port, and a second receive chain secondary port connectible to a second one of the plurality of antennas. A first switch has terminals connected to the first transmit port, the first receive chain primary port, and the second receive chain secondary port, as well as a common terminal that is connected to the first antenna port. Additionally, the front end circuit has a second switch that has terminals connected to the second transmit port, the second receive chain primary port and the first receive chain secondary port, and a common terminal connected to the second antenna port. | 09-09-2010 |
20100277252 | MULTI-MODE RADIO FREQUENCY FRONT END MODULE - A radio frequency (RF) front end circuit for connecting an antenna to a transceiver having multiple operating modes is disclosed. The circuit has a first transmit input receptive to signals of a first operating mode and a second operating mode from the transceiver. There is also a second transmit input receptive to signals of a third operating mode from the transceiver. The circuit has a first power amplifier for the first and second operating modes, a second power amplifier for the first operating mode, and a third power amplifier for the second and third operating mode. A first switch network selectively interconnects the first transmit input to a one of the second and third power amplifiers. | 11-04-2010 |
20100329321 | ELECTRONIC DEVICE FOR RECEIVING A RADIO-FREQUENCY SIGNAL - An electronic device includes an analog-to-digital converter adapted to receive a radio-frequency signal and adapted to provide therefrom a digital signal, wherein the radio-frequency signal may include an interference signal. The electronic device has a controller adapted to perform a digital measure on the digital signal and adapted to generate therefrom a selection signal having a first value indicating a non-interference condition in the radio-frequency signal and having a second value indicating an interference-condition in the radio-frequency signal. A selector is adapted to transmit the digital signal in case the selection signal has the first value and to transmit a signal replacing the digital signal in case the selection signal has the second value. | 12-30-2010 |
20110003563 | Radio Frequency Front End Circuit with Antenna Diversity for Multipath Mitigation - A front end circuit for selectively coupling a first antenna and a second antenna to a transmit chain and a receive chain of a radio frequency (RF) transceiver is disclosed. There is a first power amplifier having an input connectible to the transmit chain of the RF transceiver, a first low noise amplifier having an output connectible to the receive chain of the RF transceiver, and a second low noise amplifier with an input connectible to the second antenna, as well as an output connectible to the receive chain of the RF transceiver. A first matching and switch network is connected to the first antenna, the output of the first power amplifier, and the input of the first low noise amplifier. Transmit signals from the first power amplifier and receive signals from the first antenna are selectively passed to the first antenna and the first low noise amplifier. | 01-06-2011 |
20110025435 | COMPACT RF ISOLATION NETWORK FOR MULTI-PIN PACKAGED INTEGRATED CIRCUITS - Pins on an RFIC package carry RF signals between the package and a PCB. A first capacitor is coupled between a selected pin of the RFIC package near the pins carrying the RF signals and a radio-frequency ground on the PCB. A coupling between the RFIC package and the PCB is modeled, and includes modeling of the pins of interest and at least one parasitic element of the coupling. A capacitance of the first capacitor is selected based on the modeling to obtain desired performance at selected operational frequencies. A second capacitor may be coupled between the selected pin a radio frequency ground of the RFIC package. An inductor may be coupled in parallel across the first capacitor. | 02-03-2011 |
20110128199 | FIELD-CONFINED WIDEBAND ANTENNA FOR RADIO FREQUENCY FRONT END INTEGRATED CIRCUITS - A field-confined wideband antenna assembly is disclosed. The antenna assembly includes a radiating element with a planar body that defines a first confining slot. The dimensions of the first confining slot correspond to a first set of resonance frequencies of the radiating element. A feeding line extends from the radiating element in an angularly offset relationship to the planar body. A first grounding line extends from the radiating element in an angularly offset relationship to the first body. A dielectric assembly supports the planar body of the radiating element. There is a first high frequency current loop that is formed from the feeding line to the radiating element about the first confining slot and to the first grounding line. With this, the first high frequency current loop confines current and electric fields on the radiating element. | 06-02-2011 |
20110165848 | TRANSMIT-RECEIVE RADIO FREQUENCY FRONT END INTEGRATED CIRCUITS FOR LAPTOP COMPUTER APPLICATIONS - A radio frequency communications system with a first operating frequency band and a second operating frequency band is disclosed. There is a first antenna. A transceiver has a first transmission port, a second transmission port, a first reception port, and a second reception port. In a first front end circuit, a first port is coupled to the antenna, and a second port is coupled to the transceiver. The first front end circuit has a first low noise amplifier, a second low noise amplifier, a first power amplifier, and a second power amplifier. A switching circuit connects the first transmission port, the first reception port, the second transmission port, and the second reception port to the second port of the first front end circuit. The antenna is distant from the transceiver, while the first front end circuit is proximal to the antenna. The first switching circuit is proximal to the transceiver. | 07-07-2011 |
20110165849 | INCREASED RECEIVE SENSITIVITY RADIO FREQUENCY FRONT END INTEGRATED CIRCUITS - A front end circuit for coupling an antenna to a radio frequency (RF) transceiver is disclosed. An antenna port connectible to the antenna is provided, as well as a power amplifier coupled to a signal output of the RF transceiver and a low noise amplifier coupled to the signal input of the RF transceiver. The front end circuit includes a switching network that is connected to the antenna port, the power amplifier, and the low noise amplifier. Additionally, there is at least one resonant circuit and a control circuit coupled to a receive enable line of the transceiver. This resonant circuit defines a parallel resonance with a first resonant resistance in the operating frequency band upon activation in the receive mode. The resonant circuit also defines a substantially high transistor impedance upon deactivation in the transmit mode. | 07-07-2011 |
20110279344 | RADIO FREQUENCY PATCH ANTENNAS FOR WIRELESS COMMUNICATIONS - An antenna assembly connectible to a radio frequency (RF) front end integrated circuit is disclosed. The antenna assembly includes a feed port connectible to a feeding line. There is a set of inner patch elements each having substantially identical first dimensions corresponding to a center resonant operating frequency, and also define perpendicular slots of predetermined lengths. The inner patch elements are in a spaced, parallel relationship. A set of outer patch elements each has substantially identical second dimensions. The inner patch elements are in a spaced, parallel and interposed relationship between the set of outer patch elements. A first electrically conductive element of the feed port is connected to a first one of the inner patch elements, and a second electrically conductive element of the feed is connected to a second one of the inner patch elements. | 11-17-2011 |
20110309985 | WIDEBAND PRINTED CIRCUIT BOARD-PRINTED ANTENNA FOR RADIO FREQUENCY FRONT END CIRCUIT - A printed circuit board (PCB)-printed antenna for a radio frequency (RF) front end with an antenna port for a predefined operating frequency band. A radiating element with a first branch defined by a first set of dimensions corresponding to a minimum frequency and a second branch defined by a second set of dimensions corresponding to a maximum frequency is fixed to a PCB substrate. A third branch is defined by a third set of dimensions corresponding to a middle frequency in various embodiments. A feed line is electrically connected to the radiating element and defines a feed port that is connectable to the antenna port. A ground line is electrically connected to the radiating element and defines a ground port. The first branch defines a first resonance, the second branch defines a second resonance, and the third branch defines a third resonance, all of which are superposed to define a bandwidth of the radiating element that is substantially equivalent to the predefined operating frequency band of the RF front end. | 12-22-2011 |
20110309993 | SMALL-SIZE PRINTED CIRCUIT BOARD-PRINTED MEANDER LINE INVERTED-F ANTENNA FOR RADIO FREQUENCY INTEGRATED CIRCUITS - A printed circuit board-printed antenna for a radio frequency front end with an antenna port for a predefined operating frequency band is disclosed. A ground line and a feed line are connected to a radiating element fixed to a bare section of a printed circuit board substrate. The radiating element is in an inverted-F configuration with a primary segment extending in a perpendicular relationship to the connected ground line and the feed line. A plurality of successive meander segments is initially connected to the primary segment and ends at a radiating element tip. A high frequency current loop is formed with an origin from the feed line to a terminus via the ground line and the radiating element tip. The high frequency current loop confines current and electronic fields on the radiating element. | 12-22-2011 |
20120161898 | ON-DIE RADIO FREQUENCY DIRECTIONAL COUPLER - A directional coupler with increased directivity is disclosed. There is an input port, an output port, a coupled port, and a ballasting port. A first transmission element has a first connection to the input port and a second connection to the output port, and a second transmission element has a first connection to the coupled port and a second connection to the ballasting port. A first compensation capacitor is connected to the input port and the coupled port, and a second compensation capacitor is connected to the input port and the ballasting port. | 06-28-2012 |
20120218167 | LOW COST PATCH ANTENNA UTILIZED IN WIRELESS LAN APPLICATIONS - The present invention is a low cost patch antenna utilized in one or more wireless LAN applications that include a patch plate that uses double-sided 30 mil FR4 PCB with ½ oz. copper with a cross-shaped slot disposed on the patch plate and a feeding point and a grounding PCB with a top surface. The RF feeding cable has an outer conductor and an inner conductor that is a 50 ohm 086 RF coaxial cable that is used to feed the low cost patch antenna, a plurality of patch supports that include a plurality of plastic cylinders which are used to support the patch plate and a plastic radome to protect the low cost patch antenna. The low cost patch antennas and patch plates can also be assembled in a plurality of different configurations for different Access Points and MIMO applications. | 08-30-2012 |
20120262217 | RADIO FREQUENCY MULTI-PORT SWITCHES - A multiport radio frequency (RF) switch circuit is disclosed. The switch circuit includes a first transistor that is connected to a first port, a common antenna port, and a first enable line. The first transistor is selectively activatable in response to a first enable signal applied to the first enable line. There is also a second transistor connected to a second port, the common antenna port, and a second enable line. The second transistor is selectively activatable in response to a second enable signal applied to the second enable line. A first inductor connected to the first port and the second port compensates for parasitic capacitance between the first port and the second port from an inactive one of the transistors. | 10-18-2012 |
20120280754 | POWER AMPLIFIER WITH CO-EXISTENCE FILTER - A power amplifier architecture and front end circuits utilizing the same that connect a transceiver to an antenna are disclosed. The transceiver is configured for a specific operating frequency. An input matching segment is connected to an input port, and an output matching segment is connected to an output port. An amplifier segment includes at least one transistor with a first terminal connected to the input matching segment, a second terminal connected to the output matching segment, and a third terminal connected to a filter with a range of rejection frequencies. The filter is connected in close proximity to a first inductive interconnection tying a junction connected to the third terminal to a ground. A compensator is also connected to the input matching segment and the output matching segment to minimize instability of the filter. | 11-08-2012 |
20140197892 | ON-DIE HARMONICS FILTERING FOR RADIO FREQUENCY POWER AMPLIFIERS - A power amplifier architecture for connecting a radio frequency (RF) transceiver to an antenna. An input matching circuit is connected to its input port, and an output matching circuit is connected to its output port. An amplifier circuit includes at least one amplifier active device with a first terminal connected to the input matching segment and a second terminal connected to the output matching segment. A first harmonic feedback circuit is connected across the amplifier active device. Voltage components of emissions of one or more harmonic frequencies of a carrier fundamental frequency generated by the amplifier active device is fed back with opposite phase to the first terminal of the amplifier active device. A negative feedback is defined at a level correlated with a gain level of the amplifier active device at the harmonic frequencies of the carrier fundamental frequency. Negative feedback is minimized at the carrier fundamental frequency. | 07-17-2014 |
20140306778 | MINIATURE RADIO FREQUENCY DIRECTIONAL COUPLER FOR CELLULAR APPLICATIONS - A directional coupler with increased directivity and reduced overall footprint area is disclosed. There is an input port, an output port, a coupled port, and a ballasting port. A primary chain of serially connected inductors is connected to the input port and the output port, while a secondary chain of serially connected inductors is connected to the coupled port and the ballasting port. A first compensation capacitor is connected to the input port and the coupled port, and a second compensation capacitor is connected to the input port and the ballasting port. | 10-16-2014 |
20140323066 | MULTIPLE BAND MULTIPLE MODE TRANSCEIVER FRONT END FLIP-CHIP ARCHITECTURE AND CIRCUITRY WITH INTEGRATED POWER AMPLIFIERS - An integrated circuit architecture and circuitry is defined by a die structure with a plurality of exposed conductive pads arranged in a grid of rows and columns. The die structure has a first operating frequency region with a first transmit and receive chain, and a second operating frequency region with a second transmit chain and a second receive chain. There is a shared region of the die structure defined by an overlapping segment of the first operating frequency region and the second operating frequency region with a shared power supply input conductive pad connected to the first transmit chain, the second transmit chain, the first receive chain, and the second receive chain, and a shared power detection output conductive pad connected to the first transmit chain and the second transmit chain. | 10-30-2014 |
20140327497 | COUPLED-RESONATOR ON-DIE FILTERS FOR WIFI APPLICATIONS - A radio frequency (RF) filter circuit for rejecting one or more spurious components of an input signal has a first resonator circuit including a first capacitor and a first coupled inductor pair of a first inductor and a second inductor, and a second resonator circuit with a second capacitor and a second coupled inductor pair of a third inductor and a fourth inductor. First and second resonator coupling capacitors are connected to the first resonator circuit and the second resonator circuit. A first port and a second port are connected to the first resonator circuit and the second resonator, with the filtered signal of the input signal passed through both the first resonator circuit and the second resonator circuit being output. | 11-06-2014 |
20150015339 | POWER AMPLIFIER ARCHITECTURES WITH INPUT POWER PROTECTION CIRCUITS - An RF power amplifier circuit and input power limiter circuits are disclosed. A power detector generates a voltage output proportional to a power level of an input signal. There is a directional coupler with a first port connected to a transmit signal input, a second port connected to the input matching network, and a third port connected to the power detector. A first power amplifier stage with an input is connected to the input matching network and an output is connected to the transmit signal output. A control circuit connected to the power detector generates a gain reduction signal based upon a comparison of the voltage output from the power detector to predefined voltage levels corresponding to specific power levels of the input signal. Overall gain of the RF power amplifier circuit is reduced based upon the gain reduction signal that adjusts the configurations of the circuit components. | 01-15-2015 |