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| Number | Title | Issue Date |
| 8140042 | Distributing apparatus and method for communication using the same A distributing apparatus distributes a high-frequency signal received from a transmitting-and-receiving module of a first wireless terminal to transmitting-and-receiving modules of other wireless terminals with a wiring scheme. The apparatus has at least three signa... | 03/20/2012 |
| 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 |
| 7269391 | Tunable transceiver front end A transceiver front end includes a transmit/receive (T/R) switch, a first balun, a second balun, a low noise amplifier, a power amplifier, and compensation circuitry. The T/R switch is operably coupled to an antenna for receiving inbound radio frequency (RF) signals... | 09/11/2007 |
| 7242917 | Apparatus and method for antenna attachment An apparatus and method of for attaching an antenna to a mobile communication device. The apparatus can include radio frequency generation circuitry, a radio frequency feed point coupled to the radio frequency generation circuitry, a direct current voltage source co... | 07/10/2007 |
| 7230484 | RF signal amplifier unit, RF signal transmission device and RF signal transmitting terminal-antenna An RF signals amplification block receives a first RF signal, and comprises means of amplification of this first RF signal so as to deliver a second, amplified, RF signal. This signal must be amplified by a predetermined nominal power so as to be delivered at the ou... | 06/12/2007 |
| 7167688 | RF transceiver module formed in multi-layered ceramic An RF transceiver module for wireless communication devices includes a multi-layered substrate, an RF transceiver IC mounted on the multi-layered substrate for receiving and transmitting voice or data signals, at least one band selection filter mounted on the multi-... | 01/23/2007 |
| 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 switch is closed is interposed between first signal terminal and a second ... | 12/05/2006 |
| 7113087 | Proximity sensing based on antenna impedance variation Proximity of a user body part can be detected by measuring the effects such proximity has on antenna impedance mismatches. The amount of mismatch affects the amount of RF signal energy reflected back into a transmission line connecting the antenna to a RF signal sou... | 09/26/2006 |
| 7113759 | Controller area network transceiver having capacitive balancing circuit for improved receiver common-mode rejection A controller area network transceiver and a transmission method for a controller area network provides improved symmetry between its differential output signal CANH and CANL such that capacitive imbalance is minimized. The transceiver disclosed herein includes a dri... | 09/26/2006 |
| 7092691 | Switchless multi-resonant, multi-band power amplifier The present invention discloses a generic approach to the design of single-path, switchless multi-resonant, multi-band power amplifiers. In the preferred embodiments, the amplifier includes one or more amplification stages, a switchless, multi-resonant, input impeda... | 08/15/2006 |
| 7005986 | Remote temperature monitoring apparatus A remote temperature monitoring apparatus includes a base-located energizing wave transmission/communication wave reception unit (e.g. located on a cooking stove) and a remotely-located, energizing-wave-powered, temperature-dependent communication wave emission unit... | 02/28/2006 |
| 6985760 | Foldable portable radio terminal A foldable portable radio terminal is disclosed which normally optimizes an antenna characteristic by an antenna matching circuit even if the body length of the foldable portable radio terminal varies. A folded state detection circuit sends a detection signal to a c... | 01/10/2006 |
| 6917814 | Method and mobile station for reporting multi-path signals based on a report window A method (500) and a mobile station (160) for reporting multi-path signals based on a report window are described herein. The mobile station (160) may determine a distribution of a plurality of multi-path signals observed by a receiving unit ( | 07/12/2005 |
| 6892058 | Method and apparatus for facilitating fault tolerance in a radio frequency amplifier system N input signals are fed (702) to a first Fourier Transform Matrix (FTM) (208) to produce N intermediate signals. Each of the N intermediate signals is split (704) via a non-isolating splitter (300) to produce M split signals. At least one... | 05/10/2005 |
| 6850752 | Single-to-differential conversion circuit outputting DC-balanced differential signal In a single-to-differential conversion circuit for converting a single signal into a differential signal formed of first and second signal components: a source-grounded (or emitter-grounded) first transistor receives the single signal at the drain (or collector); th... | 02/01/2005 |
| 6766155 | Fixed termination scheme for differential receiver that compensates for process, voltage, and temperature variations A novel terminating differential bus receiver with automatic compensation for process, voltage, and temperature variation is presented. A termination circuit is connected internal to the integrated circuit to the input of a differential receiver in parallel with a t... | 07/20/2004 |
| 6654618 | Variation compensating unit A variation compensating unit that compensates an amplitude variation and phase variation efficiently and that improves system reliability and communication quality. A first combining section generates a first combined signal by combining signal on differ... | 11/25/2003 |
| 6289204 | Integration of a receiver front-end in multilayer ceramic integrated circuit technology A multilayer ceramic integrated circuit module for a receiver front-end of a wireless communication device is provided. The module contains an embedded component portion, which has a plurality of thick film capacitors; a plurality of multilayer capacitors... | 09/11/2001 |
| 5930689 | Apparatus and method for producing a plurality of output signals with fixed phase relationships therebetween An apparatus and method produce a plurality of output signals (917-921) with fixed phase relationships therebetween. The apparatus (900) includes a first signal generator (901), a second signal generator (903), and a signal processor (907). The first sign... | 07/27/1999 |
| 5878331 | Integrated circuit An integrated circuit includes a single pole double throw switch including a transmitting and receiving port, a transmitting port, and a receiving port. A transmission switch is coupled between the transmitting port and the transmitting and receiving port... | 03/02/1999 |
| 5475712 | Voice coding communication system and apparatus therefor A low-delay code excited linear prediction (LD-CELP) voice coding systemapplied to a scheme, in which the transmitting side interrupts transmission during the voice-nonactive period and the receiving side generates and outputs a comfort noise during the v... | 12/12/1995 |
| 5379452 | Active frequency separating circuit In an active circuit which separates and amplifies signals received via an antenna (A) into a higher-frequency FM band and a lower-frequency FM band, weakening of the FM signals by the AM-band amplifier is avoided by adding, to the previously known circui... | 01/03/1995 |
| 5307514 | Frequency independent strong signal suppressor A frequency independent strong signal suppressor comprised of an amplitude dependent voltage standing wave ratio device for receiving and substantially absorbing incident radio frequency signals characterized by amplitudes greater than a predetermined thr... | 04/26/1994 |
| 5257407 | Automatic antenna coupler fault detector and indicator A communication system 100 comprising a dispatch sub-system 100A, a plurality of transmitters 100B, and a plurality of mobile transceivers 100C is disclosed. An antenna coupler 410 and a location sensor 414 are coupled to one another via a coax cable 412.... | 10/26/1993 |
| 5175878 | Radio network with switching arrangement for coupling radios to a selected antenna out of a plurality of antennas The antennas of a cellular telephone system are each connected to a signal divider/combiner array which/divides combines the antenna connecting path(s) into a plurality of antenna-radio/radio-antenna connecting paths. The divider array aspect is used for ... | 12/29/1992 |
| 5161255 | Motor vehicle-mounted radio wave receiving GPS apparatus requiring no drill holes for mounting The microstrip antenna embodying the present invention employs a dielectric material that forms part of a motor vehicle body shell as a dielectric composing element thereof. The motor vehicle-mounted GPS receiver comprising an outer unit, an inner unit, a... | 11/03/1992 |
| 5142698 | Microwave integrated apparatus including antenna pattern for satellite broadcasting receiver A microwave integrated apparatus, particularly useful for a satellite broadcasting receiver, comprises a housing having a radiation aperture and being electromagnetically shielded except for the radiation aperture. An insulated substrate is disposed in th... | 08/25/1992 |
| 5129099 | Reciprocal hybrid mode RF circuit for coupling RF transceiver to an RF radiator A reciprocal transceiver to radiator coupling circuit uses both microstrip and waveguide modes of RF signal transmission (including a pair of nonreciprocal hybrid mode phase shifters) to gain size and weight advantages useful in feeding large scale phase ... | 07/07/1992 |
| 5106826 | System for transmitting and/or receiving electromagnetic radiation employing resonant cavity including high Tc superconducting material Systems for transmitting and/or receiving electromagnetic signal radiation are disclosed. The inventive systems are distinguished from previous such systems in that each includes at least one resonant cavity comprising a housing containing a body, e.g., a... | 04/21/1992 |
| 4596047 | Satellite broadcasting receiver including a parabolic antenna with a feed waveguide having a microstrip down converter circuit A compact satellite broadcasting receiver comprises a circular waveguide, a strip-line-shaped probe projected into the circular waveguide, a reflecting element provided downstream of the probe in the circular waveguide and a microwave circuit having a str... | 06/17/1986 |
| 4290068 | Microwave television system A microwave television system comprising, a probe excited waveguide, an electronics circuit package contained within the waveguide, and a support for mounting the waveguide. The probe excited waveguide is an open-end waveguide which can be used as an inde... | 09/15/1981 |
| 4267604 | UHF electronic tuner An RF input tuning circuit in a UHF electronic tuner uses a semicoaxial resonant cavity circuit which feeds amplifier and other tuning circuits not of the semicoaxial type, such as lumped constant or strip-line types.... | 05/12/1981 |
| 4160210 | Printed circuit impedance transformation network with an integral spark gap A printed circuit board including a serpentine conductor formed thereon is mounted on a grounded metal chasis of the receiver's tuner so that the serpentine conductor and the grounded chassis form a transmission line for matching the impedances of the rec... | 07/03/1979 |
| 4075566 | Co-channel interference suppression apparatus The present invention refers to apparatus intended to suppress multiple co-channel interference and reflections from desired stations. The outputs of a two antenna array, which has been directed at the desired station, are fed to a sum-and-difference hybr... | 02/21/1978 |
