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| Number | Title | Issue Date |
| 8174339 | Duplexer, substrate for duplexer, and electronic apparatus A duplexer includes a transmit filter connected between a common terminal and a transmission terminal, a receive filter connected between the common terminal and a reception terminal, a capacitor connected in parallel with one of the transmit filter and the receive ... | 05/08/2012 |
| 8138854 | Filter, branching filter and communication apparatus A filter includes: a converter circuit, provided with a single-type common terminal and two balanced terminals, for performing conversion between a balanced line and an unbalanced line; two filter units coupled to each of the balanced terminals of the converter circ... | 03/20/2012 |
| 7994875 | Tri-frequency duplexer circuit and multi-frequency duplexer circuit The present invention discloses a tri-frequency duplexer circuit and multi-frequency duplexer circuit. The tri-frequency duplexer circuit comprises a microstrip line circuit, two first mushrooms, two second mushrooms and two third mushrooms. The microstrip line circ... | 08/09/2011 |
| 7982554 | 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. A high-frequency switch circuit contains: switching elements for switching the connection of pluralities... | 07/19/2011 |
| 7978024 | Integrated balanced-unbalanced duplexer Circuitry, architectures, devices and systems for multi-band radio communications using a balanced-unbalanced duplexer. An integrated balanced-unbalanced duplexer for multi-band communications may include an unbalanced multi-band port; a first balanced single-band p... | 07/12/2011 |
| 7948332 | N-channel multiplexer A radio frequency (RF) channelizer includes a first four-port balun, a second four part balun and a pair of filters coupled between the first and second four port baluns. The filters operate such that RF signals having a frequency within a desired frequency band (so... | 05/24/2011 |
| 7944324 | Compact orthomode transduction device optimized in the mesh plane, for an antenna An orthomode transducer device (D), for an antenna, comprises (i) a main guide (GP) designed for the propagation along a main axis of first and second modes having polarizations orthogonal to each other and provided with a first end coupled to a circular port (AC) a... | 05/17/2011 |
| 7924116 | Diplexer and multiplexer using the same A diplexer provides a high degree of design freedom for satisfying the requirements of electric characteristics so as to realize desired characteristics and at the same time can be downsized and a multiplexer is realized by using such a diplexer. The diplexer includ... | 04/12/2011 |
| 7876175 | Compact diplexer A diplexer for receiving and transmitting a first bandwidth signal corresponding to a first central frequency and a second bandwidth signal corresponding to a second central frequency includes a first signal end, a second signal end, a third signal end, a first impe... | 01/25/2011 |
| 7864001 | Manifold combiner for multi-station broadcast sites apparatus and method A manifold combiner for a plurality of radio frequency electromagnetic signals includes a first RF bandpass filter element with input and output ports and a first junction element, wherein the first junction element includes a first port connected to the first filte... | 01/04/2011 |
| 7816997 | Antenna multiplexer with a Pi-network circuit and use of a Pi-network An antenna multiplexer with a pi-network circuit is described, having an inductance connected in series and, on each of the two connection sides of the inductance, a capacitance connected in parallel. The pi-network circuit is used for effecting an impedance mismatc... | 10/19/2010 |
| 7710219 | Merged-filter multiplexer A multiplexer circuit may include a first-frequency-quarter-wavelength transmission line extending between a junction between a common terminal and a second-frequency terminal, and a first-frequency low-impedance circuit electrically directly connecting the first tr... | 05/04/2010 |
| 7636024 | Wireless communication apparatus and information processing terminal apparatus with a wireless application A wireless communication apparatus is made up of a transmission circuit block including an antenna that is laid out such that the transmission lines, i.e., the sum of the distance connecting respective circuit blocks between an output terminal of the transmission po... | 12/22/2009 |
| 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 frequency band signals, respectively; a body for recovering the signals r... | 06/02/2009 |
| 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 circuit comprising switching elements for switching the connection of... | 04/14/2009 |
| 7474173 | Cross-polar and co-polar transceiver A transceiver allowing transmission of a co-polar transmit signal and simultaneous reception of co-polar receive and cross-polar receive signals. An integrated orthogonal mode transducer and diplexer module containing a plurality of filters between a feed port, co-p... | 01/06/2009 |
| 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 outputting signals relating to functions of a circuit inside the layered sub... | 12/09/2008 |
| 7412210 | High frequency module A high frequency module comprises: a switch circuit connected to first and second antenna terminals; a first diplexer connected to first and second reception signal terminals and the switch circuit; a second diplexer connected to first and second transmission signal... | 08/12/2008 |
| 7408427 | Compact multi-frequency feed with/without tracking A method and apparatus forming an efficient and compact waveguide feed with all components for processing signals in multi-frequency band antenna feeds with single/dual linear/circular polarizations with/without tracking. The layout can be realized in a split block ... | 08/05/2008 |
| 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 |
| 7397323 | Orthomode transducer A waveguide orthomode transducer. In a first layer a turnstile junction having a main waveguide and four waveguide ports, and four hybrid tees each have an e-port, two opposed side-ports, and an h-port. The hybrid tees are ring-arranged around the turnstile junction... | 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 |
| 7369012 | Antenna duplexer The present invention provides an antenna duplexer comprising a transmitting filter and a receiving filter which are mounted on a package, a transmitting signal input pad and a transmitting signal output pad which are connected to input and output ends of the transm... | 05/06/2008 |
| 7356349 | High-frequency module and communication apparatus A high-frequency module includes a switching circuit having a phase-shift circuit. The phase-shift circuit matches only PCS/DCS reception signals so as to be passed therethrough by setting a control-voltage input terminal to a Low level when receiving PCS/DCS signal... | 04/08/2008 |
| 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 |
| 7330703 | Transceiver for bidirectional frequency division multiplexed transmission The present invention relates to a transceiver for bidirectional frequency division multiplexed transmission, a communication system including one or more transceivers. Optionally, the communication system is a communication system for a digital subscriber line. The... | 02/12/2008 |
| 7330088 | Waveguide orthomode transducer A waveguide orthomode transducer includes a first radio wave conducting means for conducting an electric wave of a horizontally polarized wave branched by an electric wave branch means, for conducting another electric wave of the horizontally polarized wave, for com... | 02/12/2008 |
| 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 an output port and whose transmission magnitude and phase characterist... | 01/29/2008 |
| 7324064 | Passive anti-jamming antenna system System and method for improving the interference resistance of an radio frequency (RF) antenna system through passive prescreening of the RF energy incident upon the antenna. The invention physically partitions the RF environment into two or more sectors with respec... | 01/29/2008 |
| 7321274 | RF switch A RF switch can be used in a wide frequency range and can be manufactured at a low cost. The RF switch changes a signal passing through a waveguide with a variable device that is switchable between the first state in which the variable device has a high resistance a... | 01/22/2008 |
| 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 |
| 7304377 | Package substrate, integrated circuit apparatus, substrate unit, surface acoustic wave apparatus, and circuit device On a piezoelectric substrate 23, there are provided surface acoustic wave devices F1 and F2 in which predetermined circuit patterns are formed, and a package substrate 11 comprising side vias 16 formed in a caved manner in ... | 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 |
| 7295090 | Filter circuit A filter circuit includes a plurality of resonators connected in parallel and each having loaded Q deviation equal to allowable deviation of a group delay, a divider to divide an input signal to the resonators, a combiner to combine output signals of the resonators,... | 11/13/2007 |
| 7286028 | Surface acoustic wave filter and device employing it A surface acoustic wave (SAW) filter includes a first SAW resonator, a second SAW resonator connected in series to the first SAW resonator at a first node, a third SAW resonator connected in series to the second SAW resonator at a second node, a fourth SAW resonator... | 10/23/2007 |
| 7283843 | Systems and methods for receiver upgrade Systems and methods for an upgradeable and/or reconfigurable receiver are provided. In general, the present invention is directed to providing systems and methods for designing an electronic communication system having easy and cost effective upgradeable receiver sy... | 10/16/2007 |
| 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 balanced outputs coupled to a corresponding pair of balanced receiver... | 10/16/2007 |
| 7276992 | Antenna duplexer and electronic device An antenna duplexer includes two surface acoustic wave filters having different center frequencies and a phase matching circuit that matches phases of the two surface acoustic wave filters. A matching line pattern is provided on at least two layers between the two s... | 10/02/2007 |
| 7276990 | Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same A switch arrangement comprises a plurality of MEMS switches arranged on a substrate about, and close to, a central point, each MEMS switch being disposed on a common imaginary circle centered on the central point. Additionally, and each MEMS switch is preferably spa... | 10/02/2007 |
