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7613482 |
Method and system for steering antenna beam
A hybrid wireless network system is disclosed. The hybrid wireless network system includes an antenna array, an analog subsystem, and a digital subsystem. The antenna array at least includes two...
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7610060 |
Mobile wireless communication terminal and method of matching antenna in the same
The mobile wireless communication terminal includes a first antenna, a second antenna, a signal-level detector which detects a level of a signal having been transmitted from the second antenna and...
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7596357 |
High-frequency switching circuit, high-frequency module, and wireless communications device
The present invention provides a high-frequency switching circuit comprising: two or more high-frequency switches SW 1 and SW 2 provided correspondingly to a plurality of communication systems...
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7590390 |
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...
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7580711 |
Calibration procedure for wireless networks with direct mode traffic
A calibration procedure of wireless networks to create a topology map mainly consists of two phases: a measurement phase during which each wireless device, i.e. all mobile terminals end the central...
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7577404 |
High-frequency device, high-frequency module and communications device comprising them
A high-frequency module constituted by an integral laminate for handling a plurality of transmitting/receiving systems having different passbands comprises (a) a switch module part for branching...
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7570973 |
Programmable mobile radiotelephone terminal
A programmable mobile phone terminal includes a transmitter stage, a receiver stage, a switch-over and adapter stage having an arrangement of passive structural elements connected to a plurality of...
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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...
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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...
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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...
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7561005 |
High frequency front-end module and duplexer
A high frequency front-end module includes an antenna terminal ANT, a diplexer, high frequency switches, LC filters, and SAW duplexers. The SAW duplexer is defined by SAW filters and high-pass...
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7546093 |
Antenna unit for mobile terminal
An antenna unit for a mobile terminal comprises an antenna module rotatably coupled to a terminal body. The antenna module comprises a plurality of antennas disposed inside the antenna module. Each...
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7546091 |
High-frequency circuit and high-frequency device
A high-frequency circuit for branching high-frequency signals for pluralities of communications systems of different frequencies, which comprises a lowpass filter circuit disposed between first and...
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7546089 |
Switchable directional coupler for use with RF devices
The embodiments of the present invention provide a directional coupler switchable between a normal state and a bypass state. In one embodiment, the directional coupler comprises shunt switches for...
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7545759 |
High-frequency switching module and its control method
A method for controlling a high-frequency switching module comprising a diplexer comprising first and second filter circuits F 1, F 2 for dividing signals received by an antenna to a receiving...
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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...
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7538741 |
Impedance matched passive radio frequency transmit/receive switch
A Radio Frequency (RF) structure services an antenna having a characteristic impedance and includes a differential Power Amplifier (PA), a differential Low Noise Amplifier (LNA), and a balun...
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7526256 |
Transformer-based multi-band RF front-end architecture
An apparatus and method for allowing two different signal paths to be coupled to a multi-tap transformer balun. The multi-tap transformer has a first port, which is coupled to a single antenna, and...
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7522887 |
Wireless signal switching circuit and wireless communication apparatus
A wireless signal switching circuit for switching a plurality of wireless transmitter signals or a plurality of wireless receiver signals with low loss in a dual mode compatible mobile phone...
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7515881 |
Resonance frequency shift canceling in wireless hearing aids
Systems, devices and methods are provided to switch between transmit and receive modes in wireless hearing aids. Various aspects of the present subject matter relate to a communication system....
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7512383 |
Transmit-receive switching in wireless hearing aids
Systems, devices and methods are provided to switch between transmit and receive modes in wireless hearing aids. One aspect relates to an apparatus for use within a communication system that has an...
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7505789 |
Microwave transponder
A microwave transponder. The microwave transponder includes a conductive plate including an antenna, and a semiconductor chip disposed within a terminal gap located in a vicinity of a center of the...
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7505746 |
IC receiver to minimize tracking error
A multi-band receiver in which characteristics including a tracking error are improved is provided with a variable frequency oscillator circuit, a variable divider circuit ( 39 ) for dividing an...
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7505542 |
Low jitter digital frequency synthesizer with frequency modulation capabilities
A low jitter digital frequency synthesizer includes a first counter module, a second counter module, a snapshot module, an error value generation module, and a tapped delay line. The first counter...
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7498902 |
Balanced/unbalanced filter module and communication apparatus
A balanced/unbalanced filter module includes a switch including a first port that inputs and outputs unbalanced signals in a first frequency band, a second port that inputs and outputs unbalanced...
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7477915 |
Interoperability improvement between receivers and transmitters in a mobile station
Techniques are disclosed for improving the interoperability of transmitters and receivers in a mobile station. Certain exemplary techniques involve performing filtering in a transmitter in response...
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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 (...
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7463865 |
Automatic cable loss compensation
Method and apparatus are provided for compensation of an RF link between a transmitter and amplifier of a communication system. The apparatus comprises a signal source coupled to the transmitter...
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7457650 |
Portable radio communication apparatus provided with boom portion with through hole
A portable radio communication apparatus is provided with a boom portion having both ends connected with a housing of the portable radio communication apparatus and having a central portion located...
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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...
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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...
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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...
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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,...
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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...
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7398060 |
Method facilitating inter-mode handoff
A cellular handset supports non compressed handover for different frequency ranges, and different wireless standards.
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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....
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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