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| Number | Title | Issue Date |
| 8170510 | Minimizing mutual coupling Disclosed herein are techniques, systems, and methods relating to minimizing mutual coupling between a first antenna and a second antenna. ... | 05/01/2012 |
| 8068798 | Full closed loop auto antenna tuning for wireless communications A wireless terminal includes an RF transceiver, an auto tuner, and an antenna. When a remote signal is received at the wireless terminal, the auto tuner is adjusted in accordance with the received signal to optimize OTA performance of the wireless terminal. As furth... | 11/29/2011 |
| 8055219 | Frequency agile antenna system and method A first value of an operational center frequency of a signal to transmit is determined according to received user input. The operational center frequency is centered within a first band of frequencies and the first band of frequencies has a first bandwidth. A single... | 11/08/2011 |
| 7917104 | Techniques for improved adaptive impedance matching An embodiment of the present invention provides an apparatus, comprising an RF matching network connected to at least one RF input port and at least one RF output port and including one or more voltage or current controlled variable reactive elements; and wherein th... | 03/29/2011 |
| 7831226 | Impedance matching system, network analyzer having the same, and impedance matching method thereof An impedance matching system, a network analyzer having the same, and an impedance matching method thereof are disclosed. The system includes a signal extractor to extract an output signal and an input signal having at least a portion of an electric current outputte... | 11/09/2010 |
| 7761064 | Radio frequency matching control apparatus and method for portable communication terminal A radio frequency (RF) matching control apparatus and method for a portable communication terminal is provided. An RF matching control apparatus for a portable communication terminal according to the present invention includes matching circuitry for performing RF ma... | 07/20/2010 |
| 7706759 | RF reception system with programmable impedance matching networks and methods for use therewith A (radio frequency) RF reception system includes an off-chip antenna interface and an integrated circuit. The an off-chip antenna interface includes at least one first off-chip impedance matching component, a filter, and at least one second off-chip impedance matchi... | 04/27/2010 |
| 7672647 | Integrated circuit for transmitting and/or receiving signals An integrated circuit for transmitting and/or receiving signals includes a differential antenna terminal for coupling to an antenna, a processing circuit for processing differential signals, and first differential lines coupling the differential antenna terminal to ... | 03/02/2010 |
| 7647027 | Tuneable filter control method and base station A method of controlling a tuneable filter (13a) of an antenna network (13) for use in a base station (1). The proposed method comprises: inputting an output of the antenna network (13) to a pre-di... | 01/12/2010 |
| 7567782 | Re-configurable impedance matching and harmonic filter system Methods and apparatus are provided to enable a transceiver (200) or transmitter including a single PA line-up (210) to transmit signals having frequencies in two or more different frequency bands, and/or having two or more different modulation types, a... | 07/28/2009 |
| 7539465 | Tuning an RFID reader with electronic switches A reader for an RFID system includes a signal driver for generating an excitation signal and a resonant circuit having an adjustable resonant circuit capacitance for retuning the resonant circuit in response to detuning. The resonant circuit has a capacitance tuning... | 05/26/2009 |
| RE40620 | Fully integrated All-CMOS AM transmitter with automatic antenna tuning A monolithic AM transmitter is disclosed. An external antenna forms part of a resonance network so that the antenna resonance point is automatically tuned to the transmit frequency. This provides flexibility with no added cost to the transmitter. Additionally, compo... | 01/06/2009 |
| 7450914 | Method and apparatus for allocating data communications resources in a satellite communications network A method and system are provided for allocating satellite resources in a satellite communication system. A network interface is provided for making requests for satellite resources. A request processor determines whether the requests can be fulfilled based on a plur... | 11/11/2008 |
| 7437130 | Smart tuning AM transmitter A radio transmitter is adapted to automatically adjust aerial impedance for a selected radio frequency. The radio transmitter includes a tunable radio frequency signal generator that has an impedance and is adapted to generate a radio frequency signal in the range o... | 10/14/2008 |
| 7426373 | Electrically tuned resonance circuit using piezo and magnetostrictive materials An impedance tuning system, especially for a cellular telephone system. The system can be used to match the impedance of an antenna element with that of an output stage of a transmitter driving the antenna element. The system includes a piezo capacitor in parallel w... | 09/16/2008 |
| 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 coaxial cables required to interface with N antennas from the conven... | 04/29/2008 |
| 7366244 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 04/29/2008 |
| 7359677 | Device and methods for high isolation and interference suppression switch-filter Systems and methods are provided for a stacked die configuration of a high isolation switch and a rejection filter where transmit and receive signals are desired to have a high out-of-band rejection and a low loss band-pass region. In some aspects of the invention t... | 04/15/2008 |
| 7340274 | Cellular phone capable of receiving a plurality of broadcast waves A cellular telephone set is capable of receiving a plurality of broadcast waves while efficiently covering wide bands such as FM and TV broadcasts and reducing mutual effects on radio circuits if the cellular telephone set has the additional function of receiving FM... | 03/04/2008 |
| 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 device configured to receive phase reference signal data from a base stati... | 02/19/2008 |
| 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 changes a resistance of the tuning circuit when resonant. The resista... | 02/12/2008 |
| 7248844 | Radio frequency integrated circuit electo-static discharge circuit The radio frequency integrated circuit (RFIC) electrostatic discharge (ESD) circuit includes an integrated circuit pin and a radio frequency (RF) ESD circuit. The integrated circuit pin provides coupling to an antenna. The RF ESD circuit is operably coupled to the i... | 07/24/2007 |
| 7245887 | High speed CMOS transmit-receive antenna switch A high-speed CMOS transmit/receive antenna switch includes a first transistor, a second transistor and a parasitic compensation network. The first transistor is operably coupled to an antenna, to a transmit path, and to receive a transmit/receive (T/R) control signa... | 07/17/2007 |
| 7233775 | Transmit and receive antenna switch Antenna switches (1,10) in dual-band or multi-band mobile phones are according to a basic idea provided with a serial semiconductor switches (11,21,12,22) per transmitting branch (2,3) and with a further semiconductor switch (13,23) coupl... | 06/19/2007 |
| 7228102 | Resonant frequency user proximity detection An electronic device able to detect a user in close proximity. The device may be a wireless data input device, for example, a radio frequency computer mouse. The device has power management features that do not require complex hardware or software to implement. For ... | 06/05/2007 |
| 7218951 | Continuous closed-loop power control system including modulation injection in a wireless transceiver power amplifier A single continuous closed-loop power control feedback system provides seamless power control for a power amplifier and also enables an AM signal to be injected into the power amplifier through the power amplifiers' control port. The AM signal is developed by an I/Q... | 05/15/2007 |
| 7215932 | On-chip impedance matching power amplifier An on-chip impedance matching includes a transistor and a tank circuit. The transistor is operably coupled to receive an input signal. The tank circuit is operably coupled to the transistor, wherein a tap of the tank circuit provides an output of the on-chip impedan... | 05/08/2007 |
| 7212801 | Electrostatic protection circuit with impedance matching for radio frequency integrated circuits An electrostatic-discharge/impedance-matching circuit for use in radio frequency (RF) integrated circuits. The electrostatic-discharge/impedance-matching circuit includes at least one shunt circuit operable to shunt current related to an over-voltage condition and a... | 05/01/2007 |
| 7206600 | Method and apparatus of antenna detection and authentication Briefly, a method and apparatus for decoding and authenticating an antenna is disclosed. The method may include detecting attachment of an antenna to a transmitter by authenticating a cipher received from the antenna. The method further includes suspending transmiss... | 04/17/2007 |
| 7194284 | Method and apparatus for accommodating two mobile station antennas that operate in the same frequency band A method is disclosed for operating a multi-mode mobile station, wherein each mode shares at least one common band of frequencies. The method includes transmitting a signal from a first antenna circuit of the mobile station in the common band of frequencies and, whi... | 03/20/2007 |
| 7190933 | Method and apparatus for automatic tuning of a resonant loop antenna in a transceiver circuit Disclosed is a circuit and method for automatic tuning of a resonant circuit in a transceiver having a receiver and a transmitter that includes a power amplifier for driving the resonant circuit. During a transmit mode of the transceiver, a resonance voltage of the ... | 03/13/2007 |
| 7181175 | Transmit network for a cellular base-station A transmit network for cellular mobile radio networks incorporates tow transmit multiplexers (122ABE) and (122CD): the first transmit multiplexer 122ABE receives a group of output signals from three transmitters (124A, 124B and ... | 02/20/2007 |
| 7171241 | Data transmission method and arrangement A method for determining weight factors of antenna beams, the method comprising using at least one directional antenna beam implemented with an antenna array to establish a radio link, forming a radio cell with the antenna beam, dividing the radio cell into at least... | 01/30/2007 |
| 7158763 | Multi-IDT SAW hybrid communication system A SAW communication device has a main IDT mounted on an SAW substrate to receive an RF signal received by an antenna and convert the RF signal to an acoustic wave which travels along the SAW substrate in opposite directions from the main IDT. At least two secondary ... | 01/02/2007 |
| 7151914 | Transmitter system for wireless communication with implanted devices A transmitter system for wireless communication with implanted medical devices includes a transmitter circuit having a resonant network the resonant frequency of which is adjusted by a feedback circuit in order to minimize the current drain from the power source and... | 12/19/2006 |
| 7148846 | Multiple-element antenna with floating antenna element A multiple-element antenna for a wireless communication device is provided. The antenna comprises a first antenna element having a first operating frequency band and a floating antenna element positioned adjacent the first antenna element to electromagnetically coup... | 12/12/2006 |
| 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 |
| 7142811 | Wireless communication over a transducer device One aspect of the present invention is generally directed towards a system and method of tuning a transducer for transmitting and receiving a wireless signal. In an illustrative embodiment, a single transducer is coupled to a first or second circuit for either trans... | 11/28/2006 |
| 7142815 | Adjustment of the detection, transmission and/or reception parameters of an RFID reader as a function of ambient electromagnetic noise There is described a method for adjusting the detection, transmission and/or reception parameters (DET, GTx, GRx) of a radiofrequency reader (10) of an electronic radiofrequency identification system as a function of the ambient electrom... | 11/28/2006 |
| 7133652 | Circuit arrangement for compensation of the damping in an antenna feed cable for a mobile radio device The invention concerns a circuit arrangement for compensation of attenuation in an antenna lead for a mobile wireless device. The circuit arrangement is suitable for operation in a wireless network, in which the higher or the lower of two frequency ranges def... | 11/07/2006 |
