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Match Document Document Title
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...
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,...
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...
7398060 Method facilitating inter-mode handoff  
A cellular handset supports non compressed handover for different frequency ranges, and different wireless standards.
7398059 High frequency composite component  
A high-frequency composite component for selectively switching a GSM-system signal path and a DCS-system signal path for a signal transmitted to or received from an antenna terminal by a diplexer....
7383024 Multi-band handset architecture  
Architectures for a class of multi-band handsets are described. These architectures separate linearity requirements from isolation requirements and reduce the number of throws on switches requiring...
7373115 Apparatus for transmit and receive switching in a time-division duplexing wireless network  
A transmit-receive (T/R) switch for coupling a TDD transceiver to an antenna. The T/R switch comprises 1) a first circulator having a first port for receiving a transmit signal from the transceiver...
7366473 Method and apparatus for diversity switching control  
A method and apparatus for diversity switching control are generally described herein. According to one embodiment, a diversity control network is introduced which effectively reduces the number of...
7362826 Receiver including an oscillation circuit for generating an image rejection calibration tone  
A receiver circuit includes an oscillator circuit configured to generate a calibration tone and a phase locked loop (PLL) reference signal. An output frequency of the VCO may be divided by...
7359677 Device and methods for high isolation and interference suppression switch-filter  
Systems and methods are provided for a stacked die configuration of a high isolation switch and a rejection filter where transmit and receive signals are desired to have a high out-of-band...
7349674 Apparatus and method for separating transmit and receive signals for time division duplexing radio system  
A receiver is protected by reducing a transmit leakage signal leaked when a transmit signal is radiated through the antenna by using three circulators (transmitter, antenna, and receiver). The...
7349673 Adaptive radio transceiver with an antenna matching circuit  
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a...
7343137 Circuit, switching module comprising the same, and use of said switching module  
The invention relates to a circuit comprising an antenna input ( 1 ), a signal input ( 2 ) and a signal output ( 3 ), and a switching unit ( 4 ), wherein the antenna input ( 1 ) is connected to a...
7324831 Method and system for asymmetric dual-mode radio communications  
Transmitter and receiver functionality are separated in dual-mode radio transceivers to support high-rate services. Transceivers with highly asymmetric requirements that need only a high-rate...
7324790 Wireless transceiver and method of operating the same  
A transceiver 400 is provided in an ultrawide bandwidth device, which includes an antenna 110 , a transmitter circuit 145 , and a receiver circuit 165 . A transmitter amplifier 440 is...
7319716 Transmitter image suppression in TDD transceivers  
In a transceiver comprising a time-division-duplex (TDD) of transmit and receive functions, the characteristics of unwanted image signal energy being transmitted from the transceiver are...
7313367 Switched multiplexer method to combine multiple broadband RF sources  
Provided is a switched multiplexer configured to combine first, second, third and fourth signal paths each covering a sub-octave in a frequency range of from about 2 to about 18 GHz and to remove...
7295814 Antenna switch circuit and antenna switch module  
An antenna switch module connected to a common antenna for switching the connection of the antenna to a transmission circuit or a receiving circuit in plural transmitting/receiving systems having...
7292827 System and method for providing a single-ended receive portion and a differential transmit portion in a wireless transceiver  
In an input/output circuit ( 200 ), a differential balun ( 250 ) is provided that has first and second balun inputs and first and second balun outputs. An antenna ( 230 ) is connected to the first...
7289775 Method for transmit power control  
A transceiver has power control circuitry integrated therein. In particular, the power control circuitry receives a signal indicative of the transmit power level and adjusts the gain on a variable...
7283844 Multi-beam antenna wireless network system  
A wireless network system that utilizes a multi-beam antenna to communicate with multiple remote stations. The system includes a hub and one or more remote stations. The hub is connected to a...
7283793 Package filter and combiner network  
A transceiver front end circuit includes an antenna terminal capable of being coupled to an antenna. A first balun circuit has a single input that is coupled to the antenna terminal, and a pair of...
7280824 Wireless communication system  
A wireless communication system according to the invention is to perform communication with a terminal station at a radio frequency higher than a millimeter wave band. The wireless communication...
7277677 Control device for antenna matching circuit  
A control device for an antenna matching circuit is configured to output an adjusting signal for changing impedance of an element in the antenna matching circuit based on change over time in signal...
7269392 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...
7269391 Tunable transceiver front end  
A transceiver front end includes a transmit/receive (T/R) switch, a first balun, a second balun, a low noise amplifier, a power amplifier, and compensation circuitry. The T/R switch is operably...
7260363 Universal power amplifier  
A universal power amplifier for amplifying and filtering transmit and receive signals has an input switch for switching transmit and receive signals. Transmit paths in the universal power amplifier...
7254371 Multi-port multi-band RF switch  
Systems and methods are disclosed for sharing a network with two switching devices forming a single pole double throw (SPDT) switch. Two SPDT switches can also be used in a double pole double throw...
7253702 High-frequency switch module  
A high-frequency switch module, including a laminate constituted of dielectric layers having electrode patterns, the high-frequency switch module also including a high-frequency switch circuit for...
7245950 Portable radio communication apparatus provided with a boom portion and a part of housing operating as an antenna  
In a portable radio communication apparatus including a housing, at least one part of the housing is formed as a housing electrical conductor portion by an electrically conductive material. The...
7245883 Radio communication apparatus, radio communication method, antenna apparatus and first duplexer  
Radio communication apparatus comprising an antenna, a transmitting circuit outputting a transmitting signal in a first frequency band. A duplexer connected to the antenna and having a single-phase...
7242911 System and method for enhancing transmission and reception of a transceiver  
A transceiver of a terminal for use in a TDD-based mobile communication system is provided. The transceiver comprises a receiver for processing a reception signal in a reception mode; a transmitter...
7242268 Unbalanced-balanced multiband filter module  
An unbalanced-balanced multiband filter module comprising three high-frequency switches each comprising a switching element, and two unbalanced-balanced bandpass filters having different...
7239853 Antenna switching circuit  
A switching circuit for use at the antenna of a multiband mobile cellular handset comprises an antenna port 10 , a TX low band port 14 , a TX high band port 12 and at least one RX port 16 . A...
7239217 Antenna duplexer  
The disclosed is a downsized and power saving antenna duplexer. The antenna duplexer includes: diplexer; first surface acoustic wave filter to transmit/receive low channel frequency band signals;...
7236519 Transceiving filter and communication device  
First and second transmission paths are provided between a first port to which an antenna is connected and a second port to which a transceiving circuit is connected. First to fourth reception...
7236101 Multiple emergency vehicle alert system  
A warning system for making known the presence of an emergency vehicle. A transmitter is mounted in an emergency vehicle that outputs a digital UHF/LMS signal that is detectable within a range. A...
7233775 Transmit and receive antenna switch  
Antenna switches ( 1,10 ) in dual-band or multi-band mobile phones are according to a basic idea provided with a serial semiconductor switches ( 11,21,12,22 ) per transmitting branch ( 2,3 ) and...
7231151 Cosite interference rejection system using an optical approach  
A cosite interference rejection system allows cancellation of large interfering signals with an optical cancellation subsystem. The rejection system includes an interference subsystem coupled to a...
7228102 Resonant frequency user proximity detection  
An electronic device able to detect a user in close proximity. The device may be a wireless data input device, for example, a radio frequency computer mouse. The device has power management...
7212790 Communication apparatus in radio network, transmission control method, threshold value control method, and radio network system  
The carrier detector 5 notifies the threshold value controller 6 of the received power value of a received signal and then controls various portions so as to defer transmission of the...
7212789 Tunable duplexer  
The method and apparatus herein identifies tunable duplexer in a communication system. The tunable duplexer includes a tunable receiver filter, a tunable transmitter filter, a variable receiver...
7212788 Method and apparatus for signal power loss reduction in RF communication systems  
Multiple power amplifiers in an RF front end are coupled to multiple antennas without diversity switching between the PAs and antennas. Diversity switches direct signals to broadcast by a selected...
7209727 Integrated circuit radio front-end architecture and applications thereof  
An integrated RF front-end architecture is disclosed. Such an integrated RF front-end architecture includes a multi-tap balun, a low noise amplifier and a power amplifier core. The multi-tap balun...
7206552 Semiconductor switching device  
A semiconductor switching device includes two FETs with different device characteristics, a common input terminal, and two output terminals. The gate width of each FET is about 400 μm, and the...
7206551 High frequency switch module and multi-layer substrate for high frequency switch module  
A high frequency switch module comprises an antenna port, a plurality of transmission signal ports, a plurality of reception signal ports, a high frequency switch, a plurality of LPFs and a...
7203465 Receiver/transmitter circuit  
A receiver/transmitter circuit includes an antenna terminal, a transmitter circuit which outputs a transmission signal in response to a transmit control signal, a receiver circuit which receives a...
7197284 Antenna switches including field effect transistors  
The present invention provides a transceiver circuit that includes a transmission amplifier coupled with an antenna input/output node. The transmission amplifier is configured to amplify...
7194284 Method and apparatus for accommodating two mobile station antennas that operate in the same frequency band  
A method is disclosed for operating a multi-mode mobile station, wherein each mode shares at least one common band of frequencies. The method includes transmitting a signal from a first antenna...
7194241 Efficient multiple-band antenna switching circuit  
An exemplary antenna switching circuit comprises first, second, third and fourth switches. The first switch is activated by a first control signal for establishing a connection between a first...
Matches 1 - 50 out of 386 1 2 3 4 5 6 7 8 >