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7369828 Electronically tunable quad-band antennas for handset applications  
An electronically tunable quad-band antenna which includes a tunable high band antenna tuned by at least one tunable varactor associated therewith; the tunable high band antenna further includes a...
7366473 Method and apparatus for diversity switching control  
A method and apparatus for diversity switching control are generally described herein. According to one embodiment, a diversity control network is introduced which effectively reduces the number of...
7359681 Transmitting apparatus and method of mobile communication terminal  
A mobile communication terminal transmitter comprises a detecting unit for detecting at least one of a first power level and a first power of reflection; a baseband signal processing unit for...
7333835 Method and apparatus for providing user specific downlink beamforming in a fixed beam network  
The disclosed embodiments relate to a system and method for providing user specific beams in a fixed beam network. In one embodiment, there is provided a mobile transceiver comprising a first...
7330708 Tuning circuit with amplitude attenuation function and integrated circuit for radio communication apparatus  
There is disclosed a tuning circuit having a coil and a capacitor comprises a resistance-adjustment circuit connected in parallel with the coil and the capacitor. The resistance-adjustment circuit...
7295822 Radio wave receiver, radio-controlled timepiece and tuning capacitance setting method  
A radio wave receiver for receiving radio waves having a predetermined frequency, the receiver comprises an antenna, an variable capacitor connected to the antenna, a memory, and a controller which...
7292831 Radio communicate method and system  
A transmitter 1 transmits from a transmission antenna 7 a mixture signal containing a radio-frequency (RF)-band modulated signal, and a portion of power of a local oscillation signal used for...
7269399 Receiver of double conversion system with antenna tuning with variable capacitance using digital-to-analog converter having temperature coefficient setting section  
A receiver of double conversion system wherein unwanted components included in received signals can be removed without fail and wherein the number of constituent parts has been reduced. The...
7269396 Method and device for suppressing multipath interference in a receiver for electromagnetic waves  
A method and a device for a receiver for electromagnetic waves having at least two antennas are described; using this method and this device it is possible to effectively suppress multipath...
7236756 Tuning signal generator and method thereof  
A front end tuning system includes a tuning signal generator. The tuning signal generator includes a digital-to-analog converter (DAC) to receive a pre-conditioned tuning signal at a reference...
7218902 Antenna for communication with a satellite  
A telecommunication system uses a satellite antenna showing on the horizontal plane, a sufficiently narrow radiation lobe to discriminate two adjacent satellites and showing on the vertical plane,...
7206553 Method and apparatus for impedance matching in an amplifier using lumped and distributed inductance  
An impedance matching circuit ( 140 ) includes a capacitive element (C 1 , 220 ), having a capacitance C, coupled in parallel with an output node ( 215 ) of the matching circuit, and an inductor (L...
7181243 Frequency translation  
The present invention provides a serrodyne architecture that is capable of operating at high frequencies. The architecture generally includes a coupler, a delay line, and a switching system. The...
7174142 Receiver having a built-in antenna and method of impedance-matching for the same  
A receiver includes an antenna, an impedance-matching circuit, a receive circuit, a control circuit, a digital-to-analog (D/A) converter, a mode switch, and an EEPROM. The impedance-matching...
7164895 Antenna tuned circuit for a superheterodyne receiver  
A multi-band receiver in which characteristics including a tracking error are improved is provided with a variable frequency oscillator circuit, a variable divider circuit ( 39 ) for dividing an...
7149494 Demultiplexer and communication device  
A demultiplexer includes an antenna terminal, a reception filter connected to the antenna terminal, a transmission filter connected in parallel to the reception filter with respect to the antenna...
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...
7054664 Method and apparatus for providing user specific downlink beamforming in a fixed beam network  
The disclosed embodiments relate to a system and method for providing user specific beams in a fixed beam network, the fixed beam network comprising a plurality of fixed beams, each of the...
7035609 Method and apparatus for automatically identifying an antenna connected to a radio transmitter and for automatically controlling a transmitter  
A transmission system or apparatus includes a transmitter or source of transmitted RF or microwave power which is selectively connectable via a transmitter connector to an antenna having an antenna...
6983173 Telecommunications device  
A telecommunications device is provided that enables monitoring of the directivity of a wireless communications system that wirelessly transmits signals using multiple communications antennas while...
6975844 Tuner receiving system, control unit for receiving radio waves by using tuner, storage medium from which data can be read out by using computer, and method of receiving radio waves by using tuner  
A tuner receiving system, a control unit for controlling a tuner receiving operation, a computer readable storage medium, and a method of receiving radio waves by using a tuner, are disclosed. The...
6917793 Antenna assembly with a capability to remember the frequency of remote signals and to search for and memorize wireless frequency bands  
An antenna assembly has an antenna set, a rotation assembly and a control circuit for driving the rotation assembly to rotate to adjust receiving angel of the antenna set. The control circuit can...
6907234 System and method for automatically tuning an antenna  
An apparatus and method is related to a wireless system with an antenna that is automatically tuned to a desired frequency. The antenna is coupled to an adjustable tuning circuit to form a tuned...
6895230 System and method for delay equalization of multiple transmission paths  
The present invention provides systems and methods for addressing the effects of non-linear phase response, such as by equalizing electrical delays among transmission paths. A preferred embodiment...
6867981 Method of mounting combination-type IC card  
The invention is to set a resonance frequency to various resonance frequencies by cutting a signal line which connects a tuning capacitor for trimming and an antenna currently with a milling step...
6862436 High frequency circuit board and antenna switch module for high frequency using the same  
A high frequency circuit board comprising: a choke coil circuit element of a high frequency switching circuit; a dielectric laminated structure body comprising a plurality of dielectric layers...
6862432 Antenna impedance matching device and method for a portable radio telephone  
A device for matching an antenna impedance in a portable radio telephone having transmission and receiving circuits, a foldable casing enclosing the radio, the foldable casing movable between an...
6826391 Transmission and reception antenna system for space diversity reception  
A method and device for achieving space diversity reception in a system that has a first antenna and a second antenna disposed apart from each other over a quarter wavelength of the operating...
6731349 Tuner with at least a first and a second frequency band  
The invention relates to a tuner with at least a first and a second frequency band and with means for effecting a switch-over between the frequency bands, which tuner comprises a signal input...
6714771 Broadcast radio signal seek circuit  
A broadcast radio frequency receiver includes an improved seek circuit receiving analog radio signals via an antenna according to a signal seek process wherein the frequency of the analog radio...
6643503 Wireless speaker for radio communication device  
A wireless speaker apparatus for a radio communication device includes a receiver front end to receive two RF carrier signals with audio information. A tunable filter circuit provides a low side...
6628931 Shortwave receiver and antenna adaptor  
A shortwave radio-receiver shows an improved reception sensitivity that can be used in a highly convenient way. The receiver is adapted for the superheterodyne system and the PLL synthesizer system...
6535722 Television tuner employing micro-electro-mechanically-switched tuning matrix  
A tuning circuit, as for a television receiver or video recorder, employs switchable tuning circuits including micro-electronic electro-mechanical switches for selecting the ones of an array of...
6526263 Antenna impedance adjuster  
There is provided an antenna impedance adjuster including (a) an antenna through which radio signals are received and transmitted, (b) a radio signal receiver which receives radio signals having...
6456832 Antenna circuit  
An antenna circuit which is improved the deterioration of amplitude characteristic in a strong electric field, an antenna circuit for AM broadcasting which can surely inhibit and damp FM-band...
6408167 Radio device including a receiver and method of adjusting one of the high-frequency amplifier stages of a receiver  
A radio device includes a receiving part ( 45 ) formed by a high-frequency selective amplifier stage ( 50 ) including a frequency selective circuit ( 51 ) having a plurality of capacitive elements...
6321077 Reception control system for automobile  
A reception control system for automobiles according to the present invention includes tuners for a plurality of receivers for receiving various types of waves including at least an AM/FM broadcast...
6259903 Tuner and if amplifier  
Ordinarily, at least two types of mixer oscillator integrated circuits for tuners have to be used, i.e., one for the symmetrical output mode and one for the asymmetrical output mode. In order to...
6252635 Automatic tuning frequency or channel number installation  
Upon installation of a broadcast receiver, for example, a television receiver, the different tuning frequencies/channel numbers are to be stored in a memory of the broadcast receiver. To facilitate...
6246727 Method and system for tuning resonance modules  
A method and a system for tuning a resonance module in e.g. a radio base station are disclosed. The resonance module has tuning means, a transmitter connection, and an antenna connection. First...
6240281 Command protocol for circuits used for receiving microwave signals and device implementing the protocol  
In order to select one or more microwave signals from among the signals which it receives, the reception device comprises switching circuits. The switching circuits are commanded by command...
6178315 FM radio receiver  
An FM radio receiver comprises a radio frequency tuning circuit for selecting a frequency modulated signal from an antenna and a local oscillator tuning circuit for tuning to an oscillating signal...
6144843 Receiver having a commanded-tuning loop and a self-tuning loop  
In a tuning method, a commanded-tuning loop (CTL) tunes a receiver (REC) on the basis of a tuning command (TC) and a self-tuning loop (STL) tunes the receiver on the basis of a reception signal. To...
6122493 Radio receiver having automatic broadcasting-station selecting function  
The capacitance value of a variable capacitance element of an RF tuning circuit is controlled in accordance with a control signal Vx. When an automatic search start signal is supplied to a...
6118367 Data carrier system  
A data carrier system is provided including: a main apparatus including a first control unit for outputting a first signal and a first coil unit having at least a transmission coil for transmitting...
6072993 Portable radio transceiver with diplexer-switch circuit for dual frequency band operation  
A portable radio transceiver selectively transmits and/or receives RF signals in two frequency bands and in two modes of operation. The radio transceiver selectively switches between two antennas...
6070061 Adjacent channel rejection in double conversion tuner  
A double conversion tuner includes a first filter that is relatively flat over a 6 MHz band at 920 MHz. A pair of series-parallel resonant circuits form notch filters that operate on the...
6064868 Antenna tuning controller  
When mixed modulation signal may be erroneously determined to be a signal intended to be received by a particular receiver the receiver checks whether prevailing received signal is a signal...
6055420 Antenna system having a high Q circuit  
A tunable antenna system for operation over a predetermined frequency range includes a high Q antenna having a length and width each significantly less than a quarter wavelength within the...
6026280 Antenna matching circuit switching system in TDMA portable telephone  
In an antenna matching circuit switching system of a portable telephone, an antenna transmits a transmission signal and receives a reception signal in form of electromagnetic wave. A receiving...
Matches 1 - 50 out of 128 1 2 3 >