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7609128 |
Switch circuit
A branch path having a transmission line and a distributed constant line includes a resonant circuit. The resonant circuit resonates at a predetermined operating frequency when the branch path is...
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7609127 |
Electronically controllable RF switch
An RF switch circuit ( 10 ) and a tuner ( 12 ) comprising an RF switch circuit are described. The switch circuit comprises at least two input terminals and one output terminal. The input terminals...
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7605674 |
Radio frequency switch
An RF switch is provided. In the RF switch, a slot line is divided into a first slot line and a second slot line and an open-end circuit is provided at each end portion of the first and second slot...
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7589602 |
Antenna switch module
An antenna switch module between several radio-frequency transmit and/or receive paths including, between a common terminal on the antenna side and an access capacitor specific to each path, at...
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7576625 |
Millimeter-band switching circuit
A millimeter-band switching circuit easily corrects a varied off capacitance of a switching element without shifting position of the switching element. The millimeter-band switching circuit...
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7564323 |
Radio frequency switch
An RF switch is provided. In the RF switch, a T-junction slot line has a horizontal slot line and a vertical slot line. An open-end circuit is provided at each end portion of the horizontal and...
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7557674 |
Matrix switch
Four SP4T switches ( 3 1 - 3 4 ) are grouped in twos to form two switch pairs. First conductive lines ( 4 11 - 4 14 , 4 21 - 4 24 ) are arranged in fours between the SP4T switches ( 3 1 , 3 4 ; 3 2...
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7541891 |
Dual band digital multimedia broadcasting receiver
A dual band digital multimedia broadcasting (DMB) receiver is provided. The dual band DMB receiver of the present invention includes a first and a second antenna for receiving first and second...
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7535320 |
Phase shifter with flexible control voltage
The invention provides a phase shifter with flexible control voltage that is useful with all RF systems that phase shift a RF signal. The phase shifter according to the present invention may...
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7532094 |
Linear antenna switch arm and a field effect transistor
A linear antenna switch arm comprising a field effect transistor comprising a source, a drain and a plurality of gates; a signal line connected between source and drain, the signal line comprising...
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7528678 |
Antenna Switch Module
An antenna switch module includes a filter which reduces transmission loss so as to achieve high attenuation in a wide band at harmonic frequencies. This antenna switch module includes the filter,...
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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...
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7515882 |
Apparatus, methods and articles of manufacture for a multi-band switch
The invention is directed to a multi-band switch having a transmitter switching section with a plurality of transmission ports, and a receiver switching section with a plurality of receiver ports,...
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7492238 |
Radio-frequency switching circuit and semiconductor device
A common terminal 500 is connected to drains of FETs 101 and 102 via a capacitor 400. FETs 111 to 114 are serially connected, and inserted between a source of the FET 101 and a...
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7482892 |
Traveling wave switch having FET-integrated CPW line structure
A traveling-wave switch includes a FET-integrated Coplanar Waveguide (CPW) line structure. The FET-integrated CPW line structure incorporates a transistor, a signal line, and the ground, that can...
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7479844 |
Method to improve characteristics of PIN diode switches, attenuators, and limiters by control of nodal signal voltage amplitude
A method to improve characteristics of PIN diode switches, attenuators, and limiters via the control of nodal signal voltages by local impedance control.
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7471962 |
High-frequency switch circuit, high-frequency switch module and wireless communications device comprising it
A high-frequency switch circuit common to a plurality of frequency bands includes a first high-frequency switch adapted to pass transmission signals and block received signals; and a demultiplexer....
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7468543 |
Semiconductor device, communication device, and semiconductor device inspecting method
A semiconductor device comprises a semiconductor switching element having a first electrode, a second electrode and a third electrode, and permitting a high-frequency signal to pass through between...
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7466211 |
High-frequency switching module and frequency-characteristic adjusting method for high-frequency circuit
A high-frequency switching module in which a high-frequency switch including a diode, which functions as a switching device, and a high-frequency filter including inductors and a capacitor are...
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7459988 |
High linearity wide dynamic range radio frequency antenna switch
The present invention is a wide dynamic range antenna switch that, when disabled, has a stable input impedance over a wide power range. The wide dynamic range antenna switch includes multiple...
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7456703 |
High frequency switch and method for manufacturing the same
A high frequency switch includes electrically connected switching elements, such as a first diode, a second diode, inductors, capacitors, and a resistor. A diode having a smaller charge capacity in...
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7425876 |
Antenna switch circuit and high frequency module having the same
An object of the present invention is to provide an antenna switch circuit that effectively reduces signal leakages at a cross point even at higher operating frequencies and a high frequency module...
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7423499 |
High-frequency switching apparatus
A high-frequency switching apparatus is composed of a transfer circuit unit including a plurality of FETs, and a shunt circuit unit including a plurality of FETs, as well. An electromagnetic wave...
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7411471 |
High-frequency switch
A high-frequency switch operating in a millimeter wave band that includes a signal path having a λ/4 transmission path, for part of two or more branch signal paths that branch from an input...
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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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7391283 |
RF switch
An SPNT switch has at least two operating states and comprises N circuit branches. Each circuit branch comprises a first input/output port connected to a second input/output port via a series...
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7391282 |
Radio-frequency switch circuit and semiconductor device
Switch sections composed of a plurality of FETs 111 to 118 and 121 to 128 connected in series are provided between input/output terminals 161 and 162 and ground terminals 181 and 182...
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7375603 |
Integrated coupler
A non-directional coupler including a semiconductor junction in series with a capacitor, the semiconductor junction being formed so that the threshold frequency short of which it behaves as a...
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7372345 |
Circuit for connection of at least two signal sources with at least one signal output
In a circuit for connection of at least two signal sources with at least one signal output, the signal sources are connected with a control unit. The control unit activates or deactivates the...
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7368971 |
High power, high frequency switch circuits using strings of power transistors
High power, high frequency switches include a transmission line having at least three portions that are serially coupled between an input port and an output port to define at least two nodes and to...
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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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7337547 |
High frequency switching circuit device
A diode logic circuit which can select a high voltage from among the voltages of a number of control voltage input terminals using a number of diodes made of Schottky junctions is integrally formed...
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7312763 |
Wafer scale beam forming antenna module with distributed amplification
In one embodiment, a wafer scale antenna array is provided that includes: a substrate, a first plurality of antennas adjacent to the substrate; and a driving network adjacent the substrate for...
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7307490 |
High frequency switch device
A high frequency switch device has SPDT(A), SPDT(B), and SPDT(C) switches, each having one pole and a first port and a second port, wherein the second port of the SPDT(A) is grounded via a...
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7301419 |
Filtering type frequency switching circuit
Two lines Ai 1 (i=1 or 2) are connected to an input terminal In. The line A i1 is grounded via a capacitor C i1 . The line A i1 and a line B i1 form a coupled line. One end of the line B i1 is...
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7286001 |
High-frequency switching device and semiconductor device
The first terminals of a plurality of resistor elements are connected to the intermediate connection points of a plurality of FETs connected in series, and a voltage, having a phase opposite to...
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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...
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7280006 |
High-frequency switch circuit device
A high frequency switch circuit device includes: at least one distributed element of at least one transmission line; at least two lumped elements of at least one resistor and at least one...
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7268606 |
High-frequency signal switching
An electronic signal processing apparatus has a signal switch with a first and a second transistor of normally-on type, having main current channels coupled between an internal node and a switch...
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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...
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7239851 |
High frequency module
The present invention provides a high frequency module having a base substrate unit ( 2 ) which has its uppermost layer planarized to form a buildup-forming surface ( 16 ), a high frequency circuit...
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7236065 |
Integrated RF-front end having an adjustable antenna
An integrated RF front-end module for use in a communications device, such as a mobile phone. The RF front-end module is made from a laminated structure consisting of a plurality of layers. At...
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7218185 |
Impedance circuit, and filter circuit, amplifier circuit, semiconductor integrated circuit, electronic component, and wireless communications device using the same
A filter circuit is provided wherein one end of an inductor is connected to one end of a capacitor to form a signal input end. The other end of the inductor is connected to a first switch circuit,...
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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...
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7183875 |
High frequency switching component with electrostatic surge elimination
A high frequency switching component for being connected to a transmission circuit, a reception circuit, and an antenna to be used for switching to either a state in which the transmission circuit...
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7171234 |
High-frequency switch circuit
A high-frequency switch circuit is provided for switching a connection between a common transmission circuit and antenna side circuit in a plurality of transmitting and receiving systems. The...
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7146137 |
High-frequency switch
To provide a high frequency switch capable of dealing with multiple frequency bands without having plurality of switch circuits. A first diode that conducts due to a bias current when a first...
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7138885 |
Transmit receive switch with high power protection
Microwave switch (MS) comprising an antenna branch (AB), a receive branch (RB), and a transmit branch (TB). According to one embodiment, the switch comprises a protection circuit (CPL, DTC, CTRL),...
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7130655 |
High-frequency switch circuit
A high-frequency switch circuit is provided for switching a connection between a common transmission circuit and an antenna side circuit in a plurality of transmitting and receiving systems. The...
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