| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 455193100 | With antenna circuit tuning | 28 |
| 20080268803 | Techniques for antenna retuning utilizing receive power information - An embodiment of the present invention provides a method, comprising using a received signal strength indicator (RSSI) to acquire information about received power in a receiver and using the received power information to tune an antenna tuner connected to the receiver. | 10-30-2008 |
| 20080318537 | DEVICE AND METHOD FOR RECEIVING AND PROCESSING RF SIGNALS, A METHOD FOR PROVIDING DIGITAL CALIBRATION VALUES FOR SUCH A DEVICE AND A RECEIVER INCORPORATING THE DEVICE - A device for receiving a RF signal over multiple channels, a receiver incorporating the device, a method of providing digital calibration values for a digitally-tunable resonant circuit of the device, and a method of processing an RF signal. In one embodiment the device includes: (1) a low-noise amplifier having a digitally-tunable resonant circuit, (2) a memory configured to store digital calibration values particular to the device and (3) a time-constant controller coupled to the low-noise amplifier and configured to retrieve from the memory at least one of the digital calibration values as a function of a channel to be received and, based on the at least one, to cause the digitally-tunable resonant circuit to provide a time-constant corresponding to the channel to be received. | 12-25-2008 |
| 20090253395 | ANTENNA INPUT TUNING CIRCUIT - There are provided a variable tuning filter | 10-08-2009 |
| 20090318102 | RADIO WAVE RECEIVING APPARATUS - Disclosed is a radio wave receiving apparatus including: an antenna to receive a radio wave; a tuning member to allow a reception frequency of the antenna to be tuned to an intended frequency, in which tuning member a frequency characteristic is variable; a receiving member to receive a reception signal from the antenna to demodulate a modulation wave; a positive feedback member to perform a positive feedback in a signal path including the tuning member; and a switching member to turn on/off a feedback operation of the positive feedback member. | 12-24-2009 |
| 20100144295 | Adaptive Impedance Matching (AIM) For Electrically Small Radio Receiver Antennas - A method of tuning an antenna circuit includes: (a) receiving a signal on an antenna, (b) producing a received signal strength indication based on the received signal, (c) using the received signal strength indication to produce a control voltage, (d) using the control voltage to control a capacitance in an antenna matching circuit, (e) changing the control voltage to minimize a ratio of a change in the received signal strength indication to a change in the control voltage and (f) repeating steps (a), (b), (c), (d) and (e). An apparatus that implements the method is also provided. | 06-10-2010 |
| 20100178889 | BROADCAST RECEIVER FOR USE IN MOBILE COMMUNICATION TERMINAL - A broadcast receiver for use in a mobile communication terminal includes a receiving antenna and an antenna tuning circuit connected to the receiving antenna. The receiving antenna receives broadcast signals tuned to the resonant frequency of the antenna tuning circuit by changing the resonant frequency. The antenna tuning circuit includes an unwanted voltage suppression circuit that suppresses an unwanted voltage generated due to the rectification effect of a varactor when the receiving antenna receives transmission signals output from the transmission antenna of the mobile communication terminal. | 07-15-2010 |
| 20100304698 | RADIO WAVE RECEIVER - A radio wave receiver including an antenna for receiving a radio wave; a tuning unit that can discretely changing a frequency characteristic of the antenna; an oscillation generator that can oscillate the antenna and a circuit portion of the tuning unit; a reception processing section for extracting a signal of a desired wave out of a reception signal received from the antenna; a controller for generating an oscillation signal at the circuit portion by the oscillation generator, and switching a setting of the tuning unit to search a setting state of the tuning unit under which the oscillation signal is extracted by the reception processing section; and a compensator for applying a variation to a frequency characteristic of the oscillation signal or a frequency characteristic associated with signal extraction of the reception processing section when the controller searches the setting state. | 12-02-2010 |
| 20100323650 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus includes: an antenna; a communication unit for receiving a radio signal via the antenna; a tuning unit for tuning an impedance of the antenna; an impedance controller for controlling the tuning unit to match the impedance of the antenna with an impedance of the communication unit; and a halting unit for halting controlling the impedance of the antenna in accordance with an intensity of the received radio signal. | 12-23-2010 |
| 20110130107 | SHAPE MEMORY ALLOY RECEIVER - In one embodiment, a frequency agile receiver is provided that includes an antenna: a first diode having its anode coupled to ground through a first conductor; a second diode having its anode coupled to the cathode of the first diode through a second conductor, the antenna coupling to the second conductor, the second diode having its cathode coupled to an output node through a third conductor, wherein at least one of the first, second, and third conductors comprises a shape memory alloy conductor; and a tuning circuit adapted to drive a bias current into the shape memory alloy conductor. | 06-02-2011 |
| 20110171919 | SIGNAL TUNING WITH VARIABLE INTERMEDIATE FREQUENCY FOR IMAGE REJECTION AND METHODS - In a method and apparatus for operating a super-heterodyne receiver, a tuning circuit has a local oscillator for frequency shifting a desired channel to a selected frequency and a controller for controlling the local oscillator. The controller determines for each of a number of identified channels, whether an image signal is present at frequencies in the spectrum that when tuned to a first selected frequency interfere, and is operable to select a modified selected frequency at which interference between the image signal and the identified channel is reduced. | 07-14-2011 |
| 20110207424 | METHOD AND SYSTEM FOR DYNAMICALLY TUNING AND CALIBRATING AN ANTENNA USING ANTENNA HOPPING - Methods and systems for dynamically tuning and calibrating an antenna using antenna hopping are disclosed. In this regard, in a wireless device comprising an antenna that is configurable into a plurality of configurations, determining a subset of the configurations, where each configuration of the subset enables received signal strength above a threshold for a wireless channel, may be determined. During a time interval in which the wireless device is receiving signals on the wireless channel, the antenna may be configured to sequentially utilize each configuration of the subset. During the time interval, a plurality of samples of the wireless channel may be generated, where each of the samples corresponds to a different one of the configurations of the subset. The plurality of samples may be aggregated. The aggregated samples may be processed to recover information communicated on the wireless channel. | 08-25-2011 |
| 20120088463 | Dynamic Tuning and Calibration of Antenna with On-Chip Array of Capacitors - Methods and systems for dynamically tuning and calibrating an antenna using on-chip digitally controlled array of capacitors are disclosed. Aspects of one method may include dynamically tuning a mobile terminal antenna (MTA) using on-chip arrays of capacitive devices. The tuning may be, for example, to compensate for center frequency drift during operation of the mobile terminal. The tuning may be accomplished by selecting capacitive devices in the on-chip arrays of capacitive devices to use in conjunction with an inductive circuit coupled to the MTA, where the inductive circuit may be either off the chip or on the chip. Accordingly, an impedance of the circuit formed by the capacitive devices in the on-chip arrays of capacitive devices and the inductive circuit may be adjusted with respect to the MTA. A valid circuit configuration may include a configuration where no capacitive device may be selected for use with the inductive circuit. | 04-12-2012 |
| 20120129477 | RADIO WAVE RECEIVING APPARATUS - A radio wave receiving apparatus includes: an antenna to receive a radio wave; a tuning member to allow a reception frequency of the antenna to be tuned to an intended frequency, in which tuning member a frequency characteristic is variable; a receiving member to receive a reception signal from the antenna to demodulate a modulation wave; a positive feedback member to perform a positive feedback in a signal path including the tuning member; and a switching member to turn on/off a feedback operation of the positive feedback member. | 05-24-2012 |
| 20120157026 | ADAPTIVELY TUNABLE ANTENNAS INCORPORATING AN EXTERNAL PROBE TO MONITOR RADIATED POWER - An embodiment of the present invention an apparatus, comprising an apparatus, comprising an adaptively-tuned antenna including a variable reactance network connected to the antenna, an RF field probe located near the antenna, an RF detector to sense voltage from the field probe, a controller that monitors the RF voltage and supplies control signals to a driver circuit and wherein the driver circuit converts the control signals to bias signals for the variable reactance network. | 06-21-2012 |
| 20120171976 | HEADPHONE ANTENNA FOR RADIO COMMUNICATIONS DEVICE - A radio communications device includes a headphone assembly, which includes at least one aural speaker or transducer and a headphone cable functioning as an antenna and providing electrical signals carrying audio information to the at least one aural speaker or transducer. A signal separator coupled to the headphone cable separates the electrical signals carrying audio information transmitted to the headphone cable and radio frequency (RF) signals received from the headphone cable. A radio receiver receives the RF signals from the signal separator and converts the RF signals to electrical signals carrying audio information. A tuner is provided for tuning the headphone cable to a selected operating frequency of the radio receiver. An audio amplifier amplifies electrical signals carrying audio information from the radio receiver to be transmitted through the headphone cable to the at least one aural speaker or transducer. | 07-05-2012 |
| 20120225630 | Systems and Methods for Antenna Tuning in a Mobile Device - A system is described for tuning an antenna in a mobile device. The system comprises a detection module configured to interface with an accessory and identify the accessory. The system further comprises a tuner configured to retrieve one or more parameters according to the identified accessory, where the tuner is further configured to tune the antenna according to the one or more parameters. The one or more parameters are based on previously-derived information regarding tuning impairment characteristics of the accessory. | 09-06-2012 |
| 20130035050 | Antenna and Receiver Circuit - According to one aspect of the invention, there is provided an antenna including: a substrate; a conductive layer formed on a portion of a top surface of the substrate; a first slot formed within the conductive layer; a conductive stub disposed within the first slot, the conductive stub tuned to reject a first frequency band; and a second slot formed within the conductive layer, the second slot tuned to reject a second frequency band. | 02-07-2013 |
| 20130059555 | CAR AUDIO SYSTEM INCLUDING AN INTEGRATED MODULE COMPRISING A TUNER UNIT AND AN ACTIVE ANTENNA - A car audio system having a tuner unit and an active antenna integrated into a single module, the car audio system being connected to an antenna for a vehicle and receiving broadcast signals, is provided. The car audio system includes an antenna-tuner integration module, in which the active antenna for receiving and amplifying the broadcast signals and the tuner unit for selecting a broadcast signal corresponding to a specific frequency among the received broadcast signals are formed as a single module; and a car audio device connected to the antenna-tuner integration module using a data cable of a certain length corresponding to a spaced distance for preventing effects of electrical noise generated by the vehicle. | 03-07-2013 |
| 20130115903 | MRC ANTENNA DIVERSITY FOR FM IBOC DIGITAL SIGNALS - A radio receiver includes a first signal path including a first tuner configured to receive a first signal from a first antenna, and a first demodulator configured to demodulate symbols from an output of the first tuner to produce first branch metrics derived from the demodulated symbols; a second signal path including a second tuner configured to receive a second signal from a second antenna, and a second demodulator configured to demodulate symbols from an output of the second tuner to produce second branch metrics derived from the demodulated symbols; a combiner for maximum ratio combining the first branch metrics and the second branch metrics; and processing circuitry to process the combined first and second branch metrics to produce an output signal. | 05-09-2013 |
| 20130122838 | System and Method for Controlling Antenna Tuning Using an Auxiliary Channel of an Embedded Display Port Interface - An information handling system includes a capacitor, an antenna, a wireless wide area network card, an embedded display port interface, and a digital-to-analog converter. The capacitor has a variable capacitance that varies based on a voltage applied to the capacitor. The antenna is coupled to the capacitor, and has a variable resonance frequency that is based on the variable capacitance. The wireless wide area network card is in communication with the antenna, and is configured to set the variable resonance frequency to a specific frequency based on a control signal. The embedded display port interface is configured to transmit the control signal from the wireless wide area network card to a display control circuit via an auxiliary channel of the embedded display port interface. The digital-to-analog converter is in communication with the display control circuit, and is configured to provide the voltage to the capacitor in response to a signal from the display control circuit. | 05-16-2013 |
| 20130165064 | RECEPTION DEVICE AND IMAGE DISPLAY APPARATUS - A reception device includes first and second antennas that receive the same kind of electric wave; a third antenna that receives a different kind of electric waves from that of the first and the second antennas; an antenna switching switch that switches a first input mode of inputting the electric waves received by the first and second antennas and a second input mode of inputting the electric wave received by the third antenna; a first tuner circuit that receives the electric wave in each of the first and second input modes; and a second tuner circuit that receives the electric wave in the first input mode, wherein diversity reception for the first and second antennas is performed based on the signals output from the first and second tuner circuits in the first input mode, and wherein a signal is output from the first tuner circuit in the second input mode. | 06-27-2013 |
| 20130196610 | WIRELESS COMMUNICATION SYSTEM - A first communication apparatus and a second communication apparatus are capable of wireless communication with each other. The first communication apparatus has a normal operation mode and a tuning mode that differs from the normal operation mode and allows a variable matching portion to adjust a matching state. When the tuning mode is selected, the first transmission portion transmits an operation mode transition request signal to the second communication apparatus. A first reception portion receives a tuning reference signal transmitted from the second communication apparatus in response to the operation mode transition request signal. A reception signal intensity measurement portion measures a reception signal intensity of the received tuning reference signal. The variable matching portion adjusts a matching state based on the measured reception signal intensity of the tuning reference signal. | 08-01-2013 |
| 20130281037 | System for Tuning an Antenna Using Injection - A method for wireless communication includes adding a received DVB-H signal with a reference oscillator signal to generate an added DVB-H signal. The reference oscillator signal may be added at an input of a matching load. The matching load may be used to tune a wireless antenna that receives the received DVB-H signal based on a received signal strength indicator (RSSI) associated with the added DVB-H signal. The reference oscillator signal may be generated, and the generated reference oscillator signal may be amplified. The added DVB-H signal may be amplified subsequent to the adding. The RSSI associated with the added DVB-H signal may be determined. The tuning may occur during receiving of a preamble of a packet for the received DVB-H signal. | 10-24-2013 |
| 20140051375 | ELECTRONIC DEVICE AND ANTENNA RECEPTION TUNING METHOD THEREOF - An electronic device and an antenna reception tuning method thereof are provided. The electronic device includes a first main body, a second main body, a sensing unit, and a processing unit. The second main body, including an antenna and a matching unit, is disposed on the first main body through a hinge and adapted for being opened or closed relative to the first main body. The sensing unit is disposed on the electronic device, adapted for detecting a distance between the first main body and the second main body, and generates a control signal according to the distance, wherein the distance includes an angle and an open/close state between the first and the second main bodies. The processing unit is electrically connected to the sensing unit and the matching unit, and adjusts the matching unit according to the received control signal. | 02-20-2014 |
| 20140342682 | MRC ANTENNA DIVERSITY FOR FM IBOC DIGITAL SIGNALS - A method for processing a radio signal includes: receiving a signal on two antennas; demodulating the signal using first and second independent signal paths that are synchronized by symbol number; maximum ratio combining branch metrics from the two receiver paths; and using the combined branch metrics to produce an output, wherein the receiver paths include an arbitration scheme. A receiver that implements the method is also provided. | 11-20-2014 |
| 20150118984 | HIGH FREQUENCY CIRCUIT MODULE - A high frequency circuit module includes a variable inductance circuit portion and a reactance circuit portion. The variable inductance circuit portion is connected between an antenna port and ground. The variable reactance circuit is connected between the antenna port and a front-end port. The variable inductance circuit portion includes a first inductor, a second inductor, and a switch. The first inductor is connected between the antenna port and the ground. The second inductor and the switch are connected in series, and this series circuit is connected in parallel to the first inductor. | 04-30-2015 |
| 20150340994 | RECEIVER ARCHITECTURE FOR A COMPACT AND LOW POWER RECEIVER - A circuit for a receiver with reconfigurable low-power or wideband operation may comprise one or more main signal paths each coupled to a first port and including a low-noise amplifier (LNA) configured to provide a radio frequency (RF) signal to a main mixer circuit. An auxiliary signal path may be coupled to a second port. The auxiliary signal path may include an auxiliary mixer configured to provide an on-chip matching input impedance that may match an impedance of the antenna. The first port may be coupled to an RF antenna through an off-chip matching circuit, when a low-power operation is desired. The first port may be coupled to the second port and to the RF antenna, when a wideband operation is desired. | 11-26-2015 |
| 20160028375 | PASSIVE AUTOMATIC ANTENNA TUNING BASED ON RECEIVED-SIGNAL ANALYSIS - A method includes receiving a signal from a remote transmitter via an electrically-tunable antenna having a tunable element. An adjustment, to be applied to a response of the electrically-tunable antenna, is calculating by analyzing the received signal. The response of the electrically-tunable antenna is adapted by controlling the tunable element responsively to the estimated adjustment. | 01-28-2016 |
