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| Number | Title | Issue Date |
| 8179206 | Low-voltage control high-frequency switch and composite high-frequency component In a transmission/reception selection switch, a first diode is arranged in series with a transmission signal line and a second diode is arranged in shunt with a reception signal line. A first current route where a direct current passes through the first diode is con... | 05/15/2012 |
| 8149071 | Radio frequency switch and apparatus containing the radio frequency switch The present invention relates to A radio frequency (RF) switch and an apparatus including the RF switch. In an aspect of the present invention, an RF switch includes a transmission line having one end connected to an input terminal or an output terminal and the othe... | 04/03/2012 |
| 8102221 | RF switch The present invention provides an RF switch, including a diode adapted to operate as a switch when a control current is applied thereto, a first CRLH transmission line of a Φ degree phase, which provides one signal transfer path from a terminal 1 to a termin... | 01/24/2012 |
| 8089329 | Semiconductor switch, semiconductor switch MMIC, changeover switch RF module, power resistance switch RF module, and transmitter and receiver module A semiconductor switch for switching a signal according to input power and maintaining performance of a receiver system with a simple configuration. The semiconductor switch comprises: a first FET connected between a first input/output terminal and a second input/ou... | 01/03/2012 |
| 8054143 | Switch circuit and semiconductor device A switch circuit for passing or blocking a high-frequency signal includes a correction circuit for correcting an impedance component that exists in the switch circuit and that changes asymmetrically with the direct-current potential as a reference such that impedanc... | 11/08/2011 |
| 8049574 | High power UHF single-pole multi-throw switch A single pole multiple-throw switch for switching an RF signal to one of a plurality of outputs includes coupling the signal to a throw junction, said junction having connected thereto a plurality of switch legs, each leg includes a high voltage shunt diode spaced o... | 11/01/2011 |
| 7936237 | Multi-band transmit-receive switch for wireless transceiver A transmit-receive switch has a transmit port, an antenna port, and a receive port. A first switch couples the transmit port to the antenna port when a signal TxON is asserted. A LOW_BAND signal indicates the selection of a lower band of frequencies. A tuning struct... | 05/03/2011 |
| 7924115 | DPDT RF switch and TMA using the same Disclosed is a DPDT RF switch. The DPDT RF switch includes: first to fourth transmission lines for forming first to fourth ports, respectively; and first to fourth slot line pattern sections. The first slot line pattern section includes: a first slot line; and a fir... | 04/12/2011 |
| 7898359 | Modular switching arrangement The present invention relates to a switching arrangement and method of manufacturing such an arrangement, wherein first and second series-shunt diode structures (D1/D2, D3/D4) are connected to each other in a mirrored configuration to obt... | 03/01/2011 |
| 7855616 | Radio frequency switch An RF switch includes first, second and third transmission lines for forming ports, respectively, and first, second and third slot line pattern portions connected to one another, for transferring signals to the first, second and third transmission lines, respectivel... | 12/21/2010 |
| 7847655 | Switching circuit Disclosed is a switch circuit capable of reducing distortion caused by harmonics and preventing an increase in insertion loss even if the number of ports increases. The switching circuit includes one common output port, M first switches having one set of ends connec... | 12/07/2010 |
| 7843280 | Systems, methods, and apparatuses for high power complementary metal oxide semiconductor (CMOS) antenna switches using body switching and substrate junction diode controlling in multistacking structure Embodiments of the invention may provide for a CMOS antenna switch, which may be referred to as a CMOS SPDT switch. The CMOS antenna switch may operate at a plurality of frequencies, perhaps around 900 MHz 1.9 GHz and 2.1 GHz according to an embodiment of the invent... | 11/30/2010 |
| 7839234 | Switching module with harmonic phase tuning filter According to one exemplary embodiment, a switching module includes a first harmonic phase tuning filter coupled to a first input of an RF switch. The first harmonic phase tuning filter is configured to provide an output impedance that substantially matches an input ... | 11/23/2010 |
| 7812687 | High-frequency switching circuit module A high-frequency switching circuit module includes a high-frequency switch that includes an FET switching element and that selectively connects between a common input/output terminal and one of input/output terminals, and a matching circuit that is provided to the c... | 10/12/2010 |
| 7808342 | Harmonic phase tuning filter for RF switches According to one exemplary embodiment, a switching module includes a first harmonic phase tuning filter coupled to a first input of an RF switch. The first harmonic phase tuning filter is configured to provide an output impedance that substantially matches an input ... | 10/05/2010 |
| 7696840 | RF selection switch for multiple antenna input RF switches are known from the art for selecting an RF signal from a multiple of inputs. For instance a TV-tuner and TV-Front-end can have two or more antenna inputs but are implemented with a relative bad cost performance. The present invention relates to an RF sel... | 04/13/2010 |
| 7675382 | Transistor single-pole-single-throw circuit device A transistor single-pole-single-throw circuit device includes at least a transistor single-pole-single-throw circuit having a first transistor and a second transistor, and an inductor capacitor (LC) resonator having an inductor and a capacitor connected in series, a... | 03/09/2010 |
| 7642880 | Switch arrangement A single pole N throw (SPNT) switch arrangement including: a pole, one or more throw nodes and a switch mechanism arranged to connect the pole and a first throw node in response to a first signal and to disconnect the pole and the first throw node in response to a s... | 01/05/2010 |
| 7633357 | SPST switch, SPDT switch and MPMT switch A single pole single throw switch for controlling propagation of a high frequency signal between an input terminal (11a) and an output terminal (11b). First FET switches (14a, 14b) in which drains and sources o... | 12/15/2009 |
| 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 in OFF state. At this time, the distributed constant line has a predet... | 10/27/2009 |
| 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 are connected to different RF signal sources, e. g. a terre... | 10/27/2009 |
| 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 lines. A first transmission line delivers signals from and to the fi... | 10/20/2009 |
| 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 least one diode, the number of diodes directly connected to the common t... | 09/15/2009 |
| 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 includes: a coupling line having a line length that can be changed; a first ... | 08/18/2009 |
| 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 vertical slot lines. A first transmission line delivers signals from and... | 07/21/2009 |
| 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, an antenna switch circuit and an adjustment line. The filter passes f... | 05/05/2009 |
| 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 transmission line provided on the top surface of, or within, the multi-l... | 04/21/2009 |
| 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 terminal 501 via a capacitor 4... | 02/17/2009 |
| 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 be used to eliminate the limitations imposed by the parasitic inductan... | 01/27/2009 |
| 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. ... | 01/20/2009 |
| 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 transistors, which are coupled in series, to provide a main signal path be... | 12/02/2008 |
| 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 the ON state is used as the first diode, while a diode having a larg... | 11/25/2008 |
| 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 containing said antenna switch module. The antenna switch circuit co... | 09/16/2008 |
| 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 absorption material element is connected to an end of the shunt circui... | 09/09/2008 |
| 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 connection path via a branch point; an FET, which is shunt-connected betwee... | 08/12/2008 |
| 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 switch is configured to couple the receive circuitry to ground during a ti... | 07/15/2008 |
| 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 active device, and a phase shifting component connected in series with a s... | 06/24/2008 |
| 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, and between the input/outp... | 06/24/2008 |
| 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 rectifier is smaller than the coupler's operating frequency. ... | 05/20/2008 |
| 7373171 | Front end module A front end module comprises a diplexer, a first duplexer, and a second duplexer. The first duplexer is connected to the diplexer through a first high frequency switch and separates transmission signals and reception signals of the N-CDMA from each other. The second... | 05/13/2008 |
