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| Number | Title | Issue Date |
| 8165535 | Systems, methods and apparatuses for complementary metal oxide semiconductor (CMOS) antenna switches using switched resonators Systems and methods may be provided for a CMOS RF antenna switch. The systems and methods for the CMOS RF antenna switch may include an antenna that is operative to transmit and receive signals over at least one radio frequency (RF) band, and a transmit switch coupl... | 04/24/2012 |
| 8160511 | Low-voltage control high-frequency switch and composite high-frequency component In a first high frequency switch, a current path and a current path are connected in parallel. When a positive voltage is applied to a control terminal, a current flows through a path passing through (Vc2)→(DL)→(DSL1)→(DDI)→(GSL2)→(DL)... | 04/17/2012 |
| 8135357 | Integrated transmitter/receiver switch with impedance matching network A switchable inductor-capacitor-inductor (L-C-L) network, which includes an integrated T/R switch, can advantageously bridge a PA and an LNA of a wireless device. The first inductor can function as an RF choke that provides power to the PA. In one embodiment, the fi... | 03/13/2012 |
| 8131226 | Multi-band-high-frequency circuit, multi-band high-frequency circuit component and multi-band communication apparatus using same A high-frequency circuit comprising a high-frequency switch circuit for switching the three-way connection of an antenna to a transmitting circuit for the first communications system, a receiving circuit for a first communications system, and a transmitting/receivin... | 03/06/2012 |
| 8078119 | Multi mode radio frequency transceiver front end circuit with inter-stage power divider A front end circuit for coupling an antenna to a first radio frequency (RF) transceiver and a second RF transceiver is contemplated. The RF transceivers have a signal input, a signal output, a receive enable line and a transmit enable line. In addition to an antenna... | 12/13/2011 |
| 8073400 | Multi mode radio frequency transceiver front end circuit A front end circuit for coupling an antenna to a first radio frequency (RF) transceiver and a second RF transceiver is contemplated. The RF transceivers have a signal input, a signal output, a receive enable line and a transmit enable line. In addition to an antenna... | 12/06/2011 |
| 8073401 | Multi mode radio frequency transceiver front end circuit with inter-stage matching circuit A front end circuit for coupling an antenna to a first radio frequency (RF) transceiver and a second RF transceiver is contemplated. The RF transceivers have a signal input, a signal output, a receive enable line and a transmit enable line. In addition to an antenna... | 12/06/2011 |
| 8064847 | Apparatus and method for isolation and power handling in a radio frequency switch A transmit/receive switching circuit is provided. The transmit/receive switching circuit comprises a first transformer to split a transmission signal into a first split transmission signal and a second split transmission signal. The first split transmission signal i... | 11/22/2011 |
| 8041311 | Radio communication control apparatus and radio communication control method To provide a radio communication control apparatus and a radio communication control method capable of controlling simultaneous transmission and reception so as not to degrade system throughput. A simultaneous transmission and reception controller 106 ... | 10/18/2011 |
| 8027647 | Broadcasting receiving apparatus and method thereof Provided are a broadcasting receiving apparatus and a broadcasting receiving method using the same. The broadcasting receiving apparatus including: a low noise amplifying unit low-noise-amplifying an RF signal received from an antenna; an RF attenuating unit attenua... | 09/27/2011 |
| 8027648 | Radio frequency power monitor An exemplary apparatus for monitoring power of RF energy includes a transmit/receive switch configured to switch an antenna between a transmitter state and a receiver state. The switch includes a diode. The exemplary apparatus can include an output device configured... | 09/27/2011 |
| 8019289 | Radio frequency transceiver front end circuit with matching circuit voltage divider A front end circuit for coupling an antenna to a radio frequency (RF) transceiver for time domain duplex systems is disclosed. The front end circuit includes an antenna port, a power amplifier, a low noise amplifier, and a matching network. The output of the power a... | 09/13/2011 |
| 7995972 | Electronic component for communication device and semiconductor device for switching transmission and reception There are provided a transmission/reception switching circuit which is small in insertion loss and harmonic distortion and allows an increase in the output power of a power amplifier and an electronic component for communication on which the transmission/reception s... | 08/09/2011 |
| 7983627 | Circuit arrangement with improved decoupling A circuit arrangement includes a component having a closed signal path, that closed signal path connected to a first port, a second port and at least a third port. The component has a directed signal flow of a signal applied to one of that ports. Such a coupling dev... | 07/19/2011 |
| 7970357 | Transponder with stabilized oscillator A coherent RFID tag design having no internal power source is disclosed. The design exhibits a longer detection range and less interference relative to conventional tag designs. The coherent RFID tag design operates in a locked or stabilized fashion, in that the fre... | 06/28/2011 |
| 7904032 | Methods and apparatus for single sideband modulation employing a frequency shift Systems and techniques for RFID communication using a frequency shift between uplink and downlink carrier frequencies achieved by digital processing of a baseband signal before radio frequency modulation of a carrier signal occurs. Generation of the carrier signal, ... | 03/08/2011 |
| 7904030 | High frequency switch, radio communication apparatus, and high frequency switching method For example, in a conventional high frequency switch used for a mobile phone and so on, high frequency distortion is caused by a diode which is turned off upon transmission. A high frequency switch includes a switch circuit for switching transmission and reception p... | 03/08/2011 |
| 7904031 | High-frequency module for transmitting and receiving transmission-reception signals of at least three communication systems using a single antenna A high-frequency module includes a GaAs switch defining an FET switch for selectively connecting one of four RF input-output terminals to an antenna input-output terminal to be connected to an antenna. A GSM transmission signal input terminal is connected to the RF ... | 03/08/2011 |
| 7899412 | Switching element, antenna switch circuit and radio frequency module using the same A switching element is provided that realizes an stabilize a potential between the gates of the multi-gates without an increase in the insertion loss, and an antenna switch circuit and a radio frequency module each using the switch element. The switching element inc... | 03/01/2011 |
| 7894779 | Apparatus and method for transmitting and receiving multiple radio signals over a single antenna An apparatus for transmitting and receiving multiple radio frequencies simultaneously over a single antenna is provided. The apparatus comprises a transmitter signal combining apparatus configured to communicatively couple with a plurality of transmitters, wherein t... | 02/22/2011 |
| 7885614 | Antenna switch with adaptive filter An antenna switch (31) that is arranged to alternately operate in a receive mode and a transmit mode, comprises adaptive filter (30). Herewith, signal processing means (Rx1, Rx2 and Rx3) can be coupled to an antenna (1) duri... | 02/08/2011 |
| 7848713 | Common mode signal attenuation for a differential duplexer Techniques for attenuating undesired signal components from a differential duplexer are described. The duplexer provides a differential received signal at RX+ and RX− ports. This differential received signal includes an undesired common mode signal, which may come... | 12/07/2010 |
| 7844231 | Apparatus and method for transmit/receive antenna switch in a TDD wireless communication system An apparatus and method in a Time Division Duplex (TDD) wireless communication system are provided. The apparatus includes two 90° hybrid couplers and a phase converter block. The two 90° hybrid couplers each separate a signal into two signals and output the two s... | 11/30/2010 |
| 7813706 | Impedance matched lane reversal switching system An impedance matched lane reversal switching system including first and second transceiver pairs, each of the pairs including a transmitter connected to a receiver, the output of the transmitter connected to the input of the receiver and to a node, the node of each ... | 10/12/2010 |
| 7801493 | Quasi-circulator for antenna multi-coupler system A multi-coupler system for isolating radio signals in a transceiver, that includes a transmitter and a receiver, to permit simultaneous transmit by the transmitter and receive by the receiver through a single antenna in the exact same or nearby frequency ranges. Thi... | 09/21/2010 |
| 7787832 | Apparatus for TX/RX antenna switch in TDD wireless communication system An apparatus including a TX/RX antenna switch (TRAS) in a time division duplex (TDD) wireless communication system is provided. In particular, an apparatus for protecting an RX low-noise amplifier (LNA) from a radio-frequency (RF) TX signal using a 180° hybrid coup... | 08/31/2010 |
| 7783265 | Switching element, antenna switch circuit and radio frequency module using the same A switching element is provided that realizes an stabilize a potential between the gates of the multi-gates without an increase in the insertion loss, and an antenna switch circuit and a radio frequency module each using the switch element. The switching element inc... | 08/24/2010 |
| 7738842 | Apparatus for protecting receiver circuit in time division duplexing wireless communication system Provided is an apparatus for protecting a receiver circuit in a Time Division Duplexing (TDD) wireless communication system. In the protecting apparatus, an antenna switch transmits an output signal of a power amplifier to an antenna feed line and transmits an outpu... | 06/15/2010 |
| 7711329 | Adaptive filter for transmit leakage signal rejection An adaptive filter suitable for fabrication on an RF integrated circuit and used for transmit (TX) leakage rejection in a wireless full-duplex communication system is described. The adaptive filter includes a summer and an adaptive estimator. The summer receives an ... | 05/04/2010 |
| 7565116 | High frequency module A high frequency module comprises a layered substrate. Inside the layered substrate, a reception diplexer for processing reception signals and a transmission diplexer for processing transmission signals are provided. The reception diplexer and the transmission diple... | 07/21/2009 |
| 7561853 | Radio frequency switch A switch that selectively changes radio frequency signals includes at least three FETs, which are connected in series. The source electrodes or drain electrodes arranged at an intermediate stage have a width narrower than that of the source electrodes or the drain e... | 07/14/2009 |
| 7561854 | Lossless transmit path antenna switch circuit A system (200) for lossless transmit path antenna switching in a transceiver using quadrature combined power amplifiers is provided. The system is comprised of a quadrature (90°) hybrid power combiner (218) having a first and a second input port (2... | 07/14/2009 |
| 7539462 | Configurable multi-mode modulation system and transmitter A multi-mode transmitter architecture is configurable for multiple modulation modes using either polar or polar-lite modulation. Multiplexed signal paths and reconfigurable components are controlled for performance in GMSK and EDGE burst modes. Polar-lite EDGE modul... | 05/26/2009 |
| 7466962 | Methods and apparatus of providing a radio frequency local oscillator signal for a transceiver In the present technique of duplex local oscillator technique provided, a radio frequency local oscillator frequency and a duplex local oscillator frequency at a selected timeslot are assessed (516, 520) to provide a radio frequency local oscillator signal ( | 12/16/2008 |
| 7437129 | Electric component for communication device and semiconductor device for switching transmission and reception There are provided a transmission/reception switching circuit which is small in insertion loss and harmonic distortion and allows an increase in the output power of a power amplifier and an electronic component for communication on which the transmission/reception s... | 10/14/2008 |
| 7423528 | Wireless emergency response system A emergency response system including a remote module and a command module in communication with each other via a wireless communication link. The remote module includes a wireless communication circuit for receiving and transmitting wireless signals to the command ... | 09/09/2008 |
| 7403082 | Dual mode antenna switch module A dual mode antenna switch module (ASM) comprises a UMTS TX port; a UMTS RX port; and a UMTS duplexer, comprising a common port, a TX port coupled to the UMTS TX port and an RX port coupled to the UMTS RX port. The ASM further comprises an antenna port; at least one... | 07/22/2008 |
| 7400863 | Switch apparatus, switchable power amplification apparatus, and mobile communication terminal apparatus using the same A switch apparatus of the invention comprises a first input terminal, a second input terminal to which a second input signal having a level lower than a level of the first input signal is supplied, a first switch block for outputting the first input signal supplied ... | 07/15/2008 |
| 7400862 | Transmit-receive switch architecture providing pre-transmit isolation A transmit-receive switch architecture comprises a first switch coupled to transmit circuitry and to an antenna, a second switch coupled to receive circuitry and to ground, wherein the second switch is configured to couple the receive circuitry to ground during a ti... | 07/15/2008 |
| 7398060 | Method facilitating inter-mode handoff A cellular handset supports non compressed handover for different frequency ranges, and different wireless standards. ... | 07/08/2008 |
