Class 333/132 - For providing frequency separation

Subclass of Class 333 - Wave transmission lines and networks
Definition: Subject matter wherein the interchange of wave energy provides
No. of patents: 286
Last issue date: 03/26/2013

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Number	Title	Issue Date
6718157	Apparatus for commonly using antenna for call signal and television broadcasting signal in radio communication terminal Disclosed is an apparatus for commonly using an antenna for a call signal and a television (TV) broadcasting signal in a radio communication terminal including an antenna, a phone duplexer, a TV tuner, an LC parallel circuit, connected between the antenna and the ph...	04/06/2004
6696904	Duplex/diplexer having two modularly constructed filters A duplexer/diplexer comprising at least a transmission branch and a reception branch. The transmission branch and the reception branch are modularly connected by shielding, and are arranged such that the two branches are matched to an identical value of r...	02/24/2004
6677833	Multilayered band separator with grounding parasitic capacitor A multilayer band separator with a grounding parasitic capacitor. The separator includes a quasi-highpass filter, a semi-lumped lowpass filter and a phase shifter. The quasi-highpass filter includes a third capacitor connected to an input signal, a fourth...	01/13/2004
6667723	System and method for a GPS enabled antenna A system and a 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...	12/23/2003
6661312	Multilayer filter array A multilayer filter array, which is formed by layering a plurality of conductive patterns, includes: coils corresponding to respective plurality of lines, which are formed by arranging the plurality of conductive patterns respectively to a single insulato...	12/09/2003
6653912	RF and microwave duplexers that operate in accordance with a channel frequency allocation method A duplexer is provided that includes a first tunable bandpass filter, a second tunable bandpass filter and means for coupling the first bandpass filter and the second bandpass filter to an antenna. The duplexer is operated by tuning the first tunable band...	11/25/2003
6639489	Composite high-frequency switch, high-frequency module, and communication apparatus A high-frequency module prevents distortion in first and second diodes of a high-frequency switch in a communication system which is not selected without providing a negative power source, and a communication apparatus includes such a high-frequency modul...	10/28/2003
6606015	High-frequency switch, laminated high-frequency switch, high-frequency radio unit, and high frequency switching method A high-frequency switch has a first transmission-reception switching circuit for selectively switching between the signal transfer between an antenna terminal and a first transmitting-circuit terminal and the signal transfer between the antenna terminal a...	08/12/2003
6587015	Transmission/reception unit with improved antenna gain In the transmission/reception unit according to the present invention, a first corner of a cover, which is located in the vicinity of transmission and reception terminals and a ground terminal of an antenna, or the vicinity of the corner, is soldered to a...	07/01/2003
6577205	High-frequency filter device, filter device combined to a transmit-receive antenna, and wireless apparatus using the same A high-frequency filter device includes at least one filter to be connected to a high-frequency stage of a wireless apparatus. The filter includes a voltage-controlled variable frequency resonance element which is made of a resonance element and a voltage...	06/10/2003
6573808	Millimeter wave front end A system and method providing millimeter wave front end circuitry utilizing waveguide E-plane bandpass filters for both out of band frequency rejection as well as reverse and spurious propagation of in band signals. Accordingly, a conductive base plate is...	06/03/2003
6545559	Tuning method and system Tuning method for a combiner filter (2) in an antenna (3) near system for base station equipment is disclosed. Transmitted signals related to the combiner filter are compared with each other. A spectral analysis of each of the transmitted signals is perfo...	04/08/2003
6542049	Compact combination unit The invention relates to a combiner (1) for electromagnetic waves that are to be sent or received in, for example, a radio base station. The combiner comprises a first unit and at least one second unit, where the first unit comprises a first casing (8), a...	04/01/2003
6515557	Isolating signal divider/combiner and method of combining signals of first and second frequencies A signal divider/combiner (11) and method combines first and second frequency signals received by microstrip patch antennas (58, 48). A first transmission line stub (28) blocks the second frequency signals on the first signal receiving path, and a second ...	02/04/2003
6512427	Spurious signal reduction circuit A spurious signal reduction circuit which is connected to a main signal line. The spurious signal reduction circuit comprises a resistor having a terminal connected to the main signal line, an LC parallel resonance circuit and an LC series resonance circu...	01/28/2003
6512428	Device for the simultaneous reception/transmission of signals comprising a low-noise amplifier The invention comprises a low-noise amplifier of the type comprising a transistor exhibiting a saturation phase for signals of high amplitude. According to the invention, at the output of the amplifier is arranged a load impedance referring back to this o...	01/28/2003
6507251	Dual-mode band-pass filter In a dual-mode bandpass filter, a metal film is partially formed on one surface of a dielectric substrate or at a certain vertical level within the dielectric substrate, first and second input/output coupling circuits are coupled to the metal film, at lea...	01/14/2003
6496083	Diode compensation circuit including two series and one parallel resonance points The present invention aims to realize, in regard to a high frequency switch used for a mobile communication apparatus such as a portable telephone or the like, a dual band switch having simple structure and changeable to ON and OFF states in two bands. Fo...	12/17/2002
6492883	Method of channel frequency allocation for RF and microwave duplexers A method is provided for operating a duplexer including a first tunable bandpass filter, a second tunable bandpass filter and means for coupling the first bandpass filter and the second bandpass filter to an antenna. The method comprises the steps of tuni...	12/10/2002
6411176	Voltage-controlled duplexer and communication apparatus There is disclosed a duplexer comprising: a first external terminal; a second external terminal; an antenna terminal; a first frequency variable filter electrically connected between the first external terminal and the antenna terminal, and composed of at...	06/25/2002
6396365	Multiplexer for cellular telephone A multiplexer circuit adapted to receive standard cellular telephone signals and PCS signals without user intervention comprises two filter circuits. The first filter circuit presents a high impedance to signals outside the standard cellular frequency ran...	05/28/2002
6384696	Multiplexer for sorting multiple signals from an antenna A multiplexer circuit adapted to receive signals comprises two filter circuits. The first filter circuit presents a high impedance to signals outside a first frequency range and the second circuit presents a high impedance to signals outside a second freq...	05/07/2002
6335663	Multiplexer/branching filter The present invention relates to a multiplexer/demultiplexer for use in mobile communication devices and provides a small and low-loss multiplexer/demultiplexer. The present invention provides a multiplexer/demultiplexer including a first to a third ports...	01/01/2002
6310959	Tuned order crossover network for electro-acoustic loudspeakers A crossover network for partitioning by frequency and electrical audio signal from an amplifier into a plurality of frequency bands for presentation to respective drivers or transducers. Such a crossover network couples the respective transducers in a par...	10/30/2001
6304157	High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus A high-frequency dielectric ceramic composition comprises Ba, Ti, Nd, Sm, and Pr as primary components represented by the formula xBaO-yTiO2 -z{(1-m-n)Nd2 O3 -mSm2 O3 -nPr2 O11/3 } ...	10/16/2001
6297711	Radio frequency multiplexer for coupling antennas to AM/FM/WB, CB/WB, and cellular telephone apparatus An AM/FM/WB/CB/cellular telephone antenna includes a first frequency self-resonant circuit at a position above the lower end of the antenna such that the electrical length of the lower section of the antenna is equivalent to one-quarter wavelength for a f...	10/02/2001
6270367	Self terminating coaxial coupler A self terminating coaxial cable connector comprising a conductive casing and an opening there through; the opening having a first end, an insulator inserted in the opening; a conductive spring connected to a terminal; an insulative plug in the first end,...	08/07/2001
6144399	Passive system used to merge telephone and broadband signals onto one coaxial cable An apparatus and a method for simultaneously transporting telephone signals and broadband signals on a single coaxial cable. The ring line and tip line of the telephone signals are dc coupled onto the inner and outer conductors of the coaxial cable, while...	11/07/2000
6125107	Dual-band RF test interface circuit A test equipment interface circuit capable of acting as an interface between a wireless transceiver and a piece of test equipment for both high frequency band signals and low frequency band signals without the use of active or mechanical switches....	09/26/2000
6122524	Multiple service user terminal A user terminal in the form of a handset 1 is disclosed wherein a common antenna 3 is operative to provide transmission and reception on a plurality of selectable services at different frequencies, the antenna being resonant and matched for at least one o...	09/19/2000
6097268	Multilayer duplexer with no shielding electrodes A high-frequency component which requires no shielding electrodes and in which there are no limitations upon the places where plural sets of filter components can be formed. In one embodiment, a high-frequency component has first to third ports, and inclu...	08/01/2000
6067441	Coupling device to be used with a standard non-power providing directional tap for drawing and mixing AC power and RF signals therefrom A device is to be coupled and used with a standard non-power providing directional tap and includes a power coupling unit and a power combining unit. The power coupling unit is adapted to be connected to an output port of the directional tap. The power co...	05/23/2000
6043725	Filter circuit having plural passing bands The filter circuit is a filter circuit having plural passbands including a first filter having a first passband, and a second filter having a second passband, with their inputs and outputs connected mutually so that these filters are connected in parallel...	03/28/2000
6024604	Bypass tap tool A tool and method for bypassing a signal. The bypass tap tool generally comprises a housing, a pair of conductively interconnected contact assemblies and an insulation assembly. The contact assemblies are positioned in and extending from the housing. The ...	02/15/2000
6023609	Device for separating transmitting waves and receiving waves and a radio communication equipment provided with the device This separating device is provided with a transmitting filter and a receiving filter. Each of the transmitting and receiving filters comprises a variable capacity diode and a resonant element, and compose a band elimination filter. Each of the elimination...	02/08/2000
6011959	Combiner circuit for dual band voltage controlled oscillators Dual band voltage controlled oscillators (VCOs) incorporate a combiner circuit with a single output operable at two widely separated frequency bands such as 900 MHz and 1.8 GHz, for example. The combiner circuit includes a duplexer used as a combiner on t...	01/04/2000
6008706	Wide band contiguous multiplexer having a contiguous diplexer An extended band, multiple channel multiplexer 10 well-suited for use with satellite communications systems. The multiplexer utilizes a low attenuation, contiguous diplexer 18 containing contiguous diplexer filters 18a to combine two sections 11a, 11b of ...	12/28/1999
5999066	Interface module for a sending section and a receiving section An interface module having a receiving section and a sending section, the receiving section being provided with a low pass filter, an isolation transformer and a common mode choke transformer, and the sending section is provided with a low pass filter, an...	12/07/1999
5991606	Apparatus for filtering signals of an antenna arrangement and a sender/receiver arrangement with two or more antennae A pair of filter units directs incoming signals from an antenna and outgoing signals to the antenna. One of the filter units blocks the outgoing signals and passes the incoming signals while the other of the filter units blocks the incoming signals and pa...	11/23/1999
5969582	Impedance matching circuit for power amplifier An impedance matching circuit for a multi-band power amplifier has an input port for receiving RF signals from an amplifier, a first path for communicating RF signals in a first frequency band to a first output port, and at least one second path for commu...	10/19/1999

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Class 333/132 - For providing frequency separation