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7613311 Digital implementation of a fourth order Linkwitz-Riley network with a low cutoff frequency  
A simplified digital implementation of a fourth order Linkwitz-Riley crossover network is provided using approximations and transformations of the classical form. The approximation is particularly...
7612634 High frequency module utilizing a plurality of parallel signal paths  
A high frequency module incorporates a layered substrate. The layered substrate has a bottom surface and a top surface. Terminals are disposed on the bottom surface. SAW filters and inductors are...
7612629 Biased nonlinear transmission line comb generators  
Comb generators include a nonlinear transmission line (NLTL) having one or more NLTL sections. Each NLTL section includes one or more nonlinear elements and transmission line portions that provide...
7592883 Dual bandstop filter with enhanced upper passband response  
A dual bandstop filter affects frequencies in a lower passband, first and second stopbands separated by a middle passband, and an upper passband. The filter includes two legs. In one version, one...
7592882 Dual bandstop filter with enhanced upper passband response  
A dual bandstop filter affects frequencies in a lower passband, first and second stopbands separated by a middle passband, and an upper passband. The filter includes two legs. In one version, one...
7586388 Filter module and communication apparatus  
In a filter module, a common input/output portion of a switch circuit is set as a first port. A first filter arranged to pass a signal in a first frequency band is connected between a first...
7576627 Electronically tunable active duplexer  
This invention provides a novel electronically tunable active duplexer for wireless transceiver applications. It relates to an active duplexer with full-duplex operation, permitting simultaneous...
7557673 Wide bandwidth microwave balun  
A wide bandwidth microwave balun utilizes frequency band splitting and two conventional baluns operating in a high frequency band and a low frequency band, which when combined offer a full...
7538634 Frequency diplexer with an input port and a first and a second output ports  
The present invention concerns a frequency diplexer with an input port and a first and a second output ports, comprising two directional couplers ( 14 and 15 ), an unique filter ( 16 )...
7528679 Circuit arrangement for shifting the phase of an input signal and circuit arrangement for suppressing the mirror frequency  
Circuit arrangement for shifting the phase of an input signal, which circuit arrangement consists of two branches whose two output signals are 90° phase-shifted, and use of this phase shifter in a...
7522015 Switch circuit, front end module and radio terminal including switch circuit  
A small-sized, low-cost radio frequency switch circuit, which has good characteristics of isolation between a transmission circuit and a reception circuit, includes a multi-layered substrate; a...
7518469 Multi-band high-frequency circuit, multi-band high-frequency circuit component and multi-band communication apparatus using same  
A multi-band high-frequency circuit for performing wireless communications among pluralities of communication systems having different communication frequencies, comprising a high-frequency switch...
7511595 Multi-band filter module and method of fabricating the same  
A multi-band filter module and a method of fabricating the same are disclosed. At least one upper filter is deposited on an upper surface of a first substrate. The first packaging substrate...
7511594 Noise filter and noise filter array  
A noise filter includes a plurality of LC parallel resonant circuits having a plurality of coils which are connected in series and electrically connected to external electrodes at both ends...
7508284 Hybrid low pass diplex filter  
A hybrid diplex bandstop filter includes a lowpass filter circuit which passes a first range of frequencies and a highpass filter circuit passes a third range of frequencies. The filter blocks a...
7501913 Power line communication apparatus and connecting device  
A cable connecting device for power line communication includes: a first wiring line 231 and a second wiring line 232 through which AC power is capable of being supplied; a power plug 120 ...
7501912 General matching network for acoustic wave filters and acoustic resonators  
A method and circuit matches a device to n filters, wherein each filter is a SAW filter, BAW filter, or FBAR filter. The method and system: (a) provide an inductor or transmission line connected...
7495531 Filter and radio communication apparatus using the same  
A filter contains first and second resonators adjacent to each other in a first direction, each of the first resonator and the second resonator comprising a pair of first microstrip lines formed on...
7495528 Triplexer circuit  
The present invention provides a triplexer circuit obtaining an impedance matching in each of frequency bands with a simple configuration and separating a signal excellently. Three filters are...
7492239 Radio frequency combiner  
An electronic circuit, an RF signal power amplifier circuit, and an integrated circuit provide for combining two radio frequency signals. These circuits include, among other things, capacitors (...
7463115 High frequency electronic component  
A high frequency electronic component comprises a layered substrate. On the bottom surface of the layered substrate, there are provided a plurality of functional terminals for inputting and...
7459993 Resonator, band-pass filter, and duplexer  
A resonator, a band-pass filter, and a duplexer are provided. In the resonator, a first electrode is formed of a nonmagnetic conductive material. A ferromagnetic fixed layer is disposed on the...
7459989 Integrated phase shifter of differential signals in quadrature  
A distributed phase shifter including: a first planar winding having its ends defining accesses in phase opposition; a second planar winding coupled with the first one and grounded by a first...
7449977 Circuit having isolated transmitting and receiving paths  
An electrical circuit includes an antenna connection for receiving a signal, a first signal path connected to the antenna connection, a filter arranged in the first signal path, and a first and a...
7446628 Pole-zero elements and related systems and methods  
According to one aspect, the subject matter described herein includes a tunable duplexer. The tunable duplexer can include a common node for communicating signals comprising a plurality of...
7432782 Signal splitter  
A signal splitter includes a low-pass filter circuit for permitting a low-frequency component of an incoming signal in an incoming telephone line coupled to a first connecting port to pass...
7432781 Monolithic duplexer and fabrication method thereof  
A monolithic duplexer and a fabrication method thereof. The monolithic duplexer includes a device wafer, a plurality of elements distanced from each other on a top portion of a device wafer, first...
7432780 Rectangular-to-circular mode power combiner/divider  
A rectangular-to-circular mode combiner/divider is provided. In one aspect of the invention, a power combiner is provided that comprises a plurality of rectangular waveguide ports arranged in an...
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...
7389090 Diplexer circuit for wireless communication devices  
Systems and methods are disclosed for a wireless communications device for receiving wireless electronic signals including first wireless electronic signals at a first frequency and second wireless...
7379751 Multi-band transceiver and radio communication device using the transceiver  
A multi-band transceiver has a function of sharing transmitted and received signals of multiple frequency bands by the same antenna. The multi-band transceiver mounts multiple filters that...
7366487 Receiving band switching circuit with reduced signal loss upon switching receiving band  
A receiving band switching circuit includes a first high frequency circuit through which a first frequency band signal passes, a second high frequency circuit through which a second frequency band...
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...
7339446 Tunable resonator with MEMS element  
According to an embodiment of the present invention, a microelectromechanical system (MEMS) element tunes a resonator to a frequency.
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...
7323955 Narrow-band absorptive bandstop filter with multiple signal paths  
An absorptive bandstop filter includes at least two frequency-dependent networks, one of which constitutes a bandpass filter, that form at least two forward signal paths between an input port and...
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...
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...
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...
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...
7272367 Multiband filter circuit and high-frequency transmitter  
The input side and the output side of a first bandpass filter circuit BPF 1 a are magnetically coupled to each other in a jump-coupling manner by the first mutual inductance (L 31 a , L 41 a ) for...
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...
7259639 Inductor topologies and decoupling structures for filters used in broadband applications, and design methodology thereof  
Inductor topologies for filters used in broadband applications are described. In one implementation, an apparatus, such as an interface module includes a printed circuit board and a filter. The...
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...
7230510 Duplexer and method of isolating an Rx-band and a Tx-band  
A duplexer ( 1 ) with two band-pass filters ( 5, 6 ) comprising film bulk acoustic wave resonators (FBAR) ( 8, 9, 10, 11, 12, 13 ) has an extra antiresonant circuit in order to block the...
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...
7196595 Multilayer diplexer  
A multilayer diplexer has a first I/O terminal, a second I/O terminal, an antenna terminal, a high-pass filter coupled between the antenna terminal and the second I/O terminal, and a low-pass...
7142833 Matching unit  
A matching unit includes a switching means for switching an inductance of a first inductor. This switching means sets an inductance such that a first inductor shows an inductance property to both...
7135943 Diplexer formed in multi-layered substrate  
A lumped-element diplexer formed in a multi-layered substrate includes a high-pass filter circuit, a low-pass filter circuit, and a ground plane, the elements of the filter circuits being disposed...
7057472 Bypass filter, multi-band antenna switch circuit, and layered module composite part and communication device using them  
A multi-band antenna switch circuit including a diplexer connected to an antenna terminal for demultiplexing signals of different passing bands, a first and a second switch circuit for switching a...
Matches 1 - 50 out of 230 1 2 3 4 5 >