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| Number | Title | Issue Date |
| 7907033 | Tunable impedance matching networks and tunable diplexer matching systems Tunable impedance matching networks and tunable diplexer matching systems are provided. A tunable impedance matching network can include an impedance element connected between first and second nodes for communicating signals between the first and second nodes. For e... | 03/15/2011 |
| 7884684 | Radio frequency multiplexer for coupling antennas to AM/FM, CB, and television apparatus A multiplexer circuit for CB, AM/FM, and television splits the radio and television signals, adding impedance to the split lines, and providing an amplifier upstream of the split. ... | 02/08/2011 |
| 7417516 | Monolithic microwave integrated circuit providing power dividing and power monitoring functionality A monolithic integrated circuit for performing power dividing and power monitoring functions is disclosed. The monolithic integrated circuit includes a power dividing portion for dividing radio frequency (RF) signal power and a power monitoring portion for monitorin... | 08/26/2008 |
| 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 |
| 7397324 | Multilayer chip-type triplexer A multilayer chip-type triplexer is provided. It uses four-session matching transmission lines to integrate three band-pass filters at different frequency bands for simplifying triplexer design. A band-pass filter may be composed of a two-stage combline band-pass fi... | 07/08/2008 |
| 7388453 | High frequency module A high frequency module comprises a switch circuit connected to two antenna terminals and two diplexers connected to the switch circuit. Each of the diplexers incorporates two band-pass filters (BPFs). Each of the diplexers further incorporates a capacitor provided ... | 06/17/2008 |
| 7332982 | Waveguide diplexer of electric plane T-junction structure with resonant iris A waveguide diplexer having an electric plane T-junction structure with a resonant iris is disclosed. The waveguide includes: a waveguide having a predetermined shaped cross section; a transmitting filter for preventing to generate a harmonic band and a higher mode ... | 02/19/2008 |
| 7317365 | Bandpass filter having parallel signal paths A bandpass filter comprises a number of resonators which are arranged between an input and an output of the filter and which are interconnected to form at least two main signal paths that lead from the input to the output. The at least two main signal paths have ove... | 01/08/2008 |
| 7307494 | Multi-branch antenna signal separating device One aspect of the invention provides a signal separating device comprising a first and a second circuit branch connected to an antenna port, the first circuit branch comprising a filter for passing signals in a first frequency band, and the second circuit branch com... | 12/11/2007 |
| 7304549 | Method and apparatus for dual use of singly and doubly terminated networks Methods and apparatus are provided for efficiently coupling singly terminated networks with doubly terminated networks. An isolation network is disposed between a singly terminated network and a doubly terminated network. The isolation network is a three terminal de... | 12/04/2007 |
| 7298230 | Duplexer utilizing a compact splitter circuit The duplexer includes a transmit filter connected between an antenna terminal and a transmit terminal, and a splitter circuit and a receive filter connected in series between the antenna terminal and the receive terminal. The splitter circuit includes at least one p... | 11/20/2007 |
| 7268644 | Antenna connection device, antenna signal splitter and method for reception frequency control A system for connecting at least two receivers to a common antenna is proposed, antenna signal lines being supplied to the receivers, which stands out in that the input impedances of the at least two receivers are matched only in a narrow-band fashion in the range o... | 09/11/2007 |
| 7250830 | Dual band full duplex mobile radio A dual band full duplex mobile radio is provided that includes a transmit portion including a dual band filter and a receive portion including a dual band filter. The dual band full duplex mobile radio further includes a circulator connecting the transmit portion an... | 07/31/2007 |
| 7248839 | Arrangement for operating various terminal devices In a first embodiment, the invention relates to an arrangement for operating a plurality of terminal devices (6) on a common antenna (4) with a coupling network (2) comprising a first separator (8) associated with the antenna (4) a... | 07/24/2007 |
| 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; first phase shift circuit to match the transmission phase with the rec... | 07/03/2007 |
| 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 phase shifter, and variable transmitter phase shifter. Each filter and p... | 05/01/2007 |
| 7200365 | Composite high frequency component and mobile communication device including the same The invention provides a composite high frequency component constituting a part of a microwave circuit having plural signal paths corresponding to their respective frequencies, comprising: a diplexer for coupling transmitting signals from the plural signal paths for... | 04/03/2007 |
| 7181171 | System and method for providing auxiliary reception in a wireless communications system A system and method for providing auxiliary reception in a wireless communications system includes a wireless communications device. The wireless communications device includes a first antenna and a second antenna. The wireless communications device can, for example... | 02/20/2007 |
| 7180387 | Antenna duplexer The present invention provides an antenna duplexer comprising a package having a plurality of ceramic layers superposed, and a transmitting filter and a receiving filter which are mounted on a surface of the package. A phase-matching strip line is formed on a surfac... | 02/20/2007 |
| 7126440 | Modular frequency division filter The present invention is a modular frequency division filter having an antenna port that connects to two or three transmission paths. Each transmission path includes either a band pass filter or a duplexer to separate the received signal by frequency. Frequency phas... | 10/24/2006 |
| 7062236 | Transmitter circuits A polar loop transmitter includes separate phase and envelope paths providing a linearising scheme for an efficient non-linear power amplifier. Loop filters are included in each of the phase and envelope paths to enable the path characteristics to be matched to one ... | 06/13/2006 |
| 7043270 | Shared tower system for accomodating multiple service providers A system for sharing a cellular tower among multiple service providers comprises an antenna having an array of elements operable to define multiple, individual beams for signals in a communication frequency band and converter circuitry to convert the communication f... | 05/09/2006 |
| 7034635 | Antenna duplexer, design method for antenna duplexer, production method for antenna duplexer, and communication apparatus using the same An antenna duplexer including: a transmission filter, a reception filter, phase-shift circuits of adjusting phase characteristics on a transmission side and a reception side; and a junction point of connecting an antenna, wherein (1) an absolute value θ1 of ... | 04/25/2006 |
| 7034632 | Multi-tuner receivers with cross talk reduction Multi-tuner receivers with cross talk reduction are disclosed. In one embodiment, a multi-tuner receiver with cross talk reduction includes a low noise amplifier, a set of interstage filters and a set of corresponding tuners. In an alternative embodiment, a multi-tu... | 04/25/2006 |
| 7030717 | Impedance-matching wave filter An impedance matching wave filter includes an original wave filter and a match circuit. The match circuit is connected in parallel with the original wave filter and is able to be varied to produce impedance matching with the original wave filter in order to improve ... | 04/18/2006 |
| 7026887 | High-frequency composite part and wireless communications device comprising it A high-frequency module is connected to a transmitting circuit, a receiving circuit, and an antenna to control the connections between the transmitting circuit and the antenna and between the receiving circuit and the antenna. The module includes means for controlli... | 04/11/2006 |
| 7003322 | Architecture for digital shared antenna system to support existing base station hardware A legacy support block interfaces a shared antenna system with existing base station equipment of a service provider. Processing circuitry includes digital-to-analog converter circuitry, analog-to-digital converter circuitry, a local oscillator, and mixers. A shared... | 02/21/2006 |
| 6995630 | High-frequency compound switch module and communication terminal using it A high-frequency compound switch module of this invention has a first communication system comprising a switch unit for switching connection of a signal from an antenna to one of a transmission circuit and a reception circuit of the first communication system based ... | 02/07/2006 |
| 6987430 | Power line communication system and power line branching apparatus A power line communication system comprises an indoor power line and one or more power line branching apparatuses connected to the indoor power line. The power line branching apparatus comprises a communication channel that is branched off from the indoor power line... | 01/17/2006 |
| 6982612 | Duplexer and communication apparatus with a matching circuit including a trap circuit for harmonic suppression A duplexer includes a transmitting filter and a receiving filter which are connected in parallel to an antenna terminal, and a matching circuit connected between the antenna terminal and at least one of the transmitting filter and the receiving filter. A portion of ... | 01/03/2006 |
| 6980067 | Triplexer systems and methods for use in wireless communications device A wireless communication device is configured for tri-band communication. One of the bands can be for GPS operation. The wireless communication device can comprise an antenna configured to transmit and receive communication signals over two communication bands and t... | 12/27/2005 |
| 6917245 | Absolute power detector A method and apparatus is provided for detecting the output power of a power amplifier. The output power is detected by detecting the absolute values of the voltage and current at the output of the amplifier and mixing the detected voltage and current to generate a ... | 07/12/2005 |
| 6911876 | Communication terminal for transceiving two frequencies using a common one turn antenna The invention relates to a terminal for communication with data supports which function in a non-contact manner, comprising a transreceiver circuit with two resonant circuits with antenna and condenser for the emitting of two radio frequency fields of different carr... | 06/28/2005 |
| 6906672 | Planar Antenna Arrangement An antenna arrangement for use over a metallic surface in motor vehicles is adapted to improve reception in the AM frequency range. An FM loop includes two conductor sections separated by a capacitor. An AM probe extends from one of the conductor sections near an an... | 06/14/2005 |
| 6897740 | Duplexer and composite module having a package with an electroconductive lid electrically connected to a shield A duplexer includes a transmission band filter and a reception band filter connected in parallel to each other and connected to an antenna terminal. The transmission band filter and the reception band filter are accommodated in a package covered with an electrocondu... | 05/24/2005 |
| 6885259 | Matching circuit and laminated duplexer with the matching circuit Disclosed is a matching circuit of a laminated duplexer connected to an antenna terminal while being connected between transmitting and receiving filters to match the transmitting and receiving filters with the antenna terminal, the matching circuit being configured... | 04/26/2005 |
| 6865376 | System and method for a GPS enabled antenna A system and method for providing a global positioning system (GPS) enabled antenna system are provided. The GPS enabled antenna may be used, for example, on a wireless communications device such as a wireless handset. The wireless communications device includes a G... | 03/08/2005 |
| 6822531 | Switched-frequency power dividers/combiners Switchable path length coupler/dividers. Coupler/divider operation over multiple frequency bands is provided by using switchable path lengths. In one implementation, a Wilkinson-style device with switches to select different path lengths and therefore operating freq... | 11/23/2004 |
| 6812809 | Method of tuning a summing network The present invention relates to a summing network comprising: a summing point (P) having interfaces for coupling summing network branches to the summing point, and an interface for coupling the summing point (P) to an antenna (ANT), and channel units (TX1 to... | 11/02/2004 |
| 6781479 | Surface acoustic wave duplexer and communication apparatus A surface acoustic wave duplexer includes a branching section having a plurality of surface acoustic wave filters provided on a first electrode pattern on the front surface of a multi-layer substrate. An antenna terminal, a transmission terminal, and a receiving ter... | 08/24/2004 |
