With Frequency Changing Or Selecting In The Output Path Of One Or More Collectors Patents (Class 455/275)
  • Patent number: 10355761
    Abstract: A method of beam administration in a cellular or wireless network is proposed. Cellular/wireless networks operating at Ka or higher frequency band require the use of directional antenna (or through array-based beamforming) to compensate for sever pathloss. Maintaining antenna pointing and tracking accuracy is essential in many phases of the communication process. By using uplink pilot signals for beam alignment/tracking, combined with switched beamforming at the UE and adaptive beamforming at the BS, an effective beam administration is achieved with reduced overhead, complexity, and cost.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: July 16, 2019
    Assignee: MEDIATEK INC.
    Inventor: Ju-Ya Chen
  • Patent number: 9564892
    Abstract: Apparatus and methods for radio frequency (RF) PIN diode switches are provided herein. In certain configurations, one or more PIN diode switches are integrated with a driver chip in a common package. The driver chip includes voltage regulators, such as switching regulators and/or charge pumps configured to generate voltage levels used to control biasing of the PIN diode switches. Thus, the packaged switch can operate using a single power supply voltage, which the voltage regulators of the driver chip use to generate biasing voltage levels used for controlling the PIN diode switches.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: February 7, 2017
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: Wei Liu, Bipul Agarwal, Richard Mark Puente
  • Patent number: 9083410
    Abstract: A system and method for maximizing signal strength while limiting specific absorption rate in diversity transmission network is achieved by coupling a first input signal to a second input signal. The system includes a sampler, a coupling network, and combiner.
    Type: Grant
    Filed: July 8, 2012
    Date of Patent: July 14, 2015
    Assignee: GOOGLE INC.
    Inventor: Kenneth Kludt
  • Patent number: 8983398
    Abstract: An integrated circuit includes a digital interface for connection to a host controller; an antenna connection for connection to an antenna; a radio frequency transceiver for communicating data in accordance with one or more radio communication protocols, the radio frequency transceiver being configured to communicate radio frequency signals over the antenna connection in response to data exchanged over the digital interface; and radio loop-through circuitry for exchanging radio frequency signals with another integrated circuit, the radio loop-through circuitry being configured to provide radio frequency signals received at the antenna connection to an output connection of the integrated circuit.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: March 17, 2015
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Simon Chang, Alexander Thoukydides, Terence Chi-Fung Kwok
  • Patent number: 8983547
    Abstract: An apparatus and a method for reducing delay during beam alignment in a beamformed wireless communication system are provided. A method for selecting a beam pattern in a Base Station (BS) includes determining whether a direction finding signal is received through each time interval of a direction finding channel, transmitting information of whether the direction finding signal is received with respect to each time interval of the direction finding channel, changing a receive beam pattern and receiving a random access signal from a Mobile Station (MS) with at least one transmit beam pattern over a random access channel, and selecting one of transmit beam patterns of the MS and one of receive beam patterns of the BS according to the random access signal.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 17, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Su-Ryong Jeong, Tae-Young Kim, Chi-Woo Lim, Hyun-Kyu Yu
  • Patent number: 8903346
    Abstract: A system includes a first external mounted amplifier (EMA) having a first low-noise amplifier (LNA) coupled to a first antenna, a second EMA having a second LNA coupled to a second antenna, a first splitter coupled between the first antenna and the first LNA, a first phase shifter coupled to the first splitter, and a second mixer coupled to the first phase shifter. The first LNA is operable to receive a first input signal from first antenna. The second LNA is operable to receive a second input signal from second antenna. The first splitter is operable to derive a first sampling signal from first signal. The first phase shifter is operable to shift the phase of first sampling signal to create a second cancelation signal. The second mixer is operable to mix a second input signal derived from second signal with second cancelation signal to create a second output signal.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: December 2, 2014
    Assignee: ADC Telecommunications, Inc.
    Inventors: Larry G. Fischer, David Willey, Chad Boeckman
  • Publication number: 20140323075
    Abstract: A receiver for radio communication comprises: four antennas; an antenna tuning apparatus for simultaneously tuning the four antennas, the antenna tuning apparatus comprising adjustable impedance devices, each of the adjustable impedance devices having a reactance at a frequency, the reactance of any one of the adjustable impedance devices being adjustable by electrical means; four single-input and single-output low-noise amplifiers; four analog processing and conversion circuits; a multiple-input signal processing device delivering a signal to a destination, the multiple-input signal processing device delivering a tuning instruction; a tuning control unit, the tuning control unit receiving the tuning instruction from the multiple-input signal processing device, the tuning control unit delivering tuning control signals to the antenna tuning apparatus as a function of the tuning instruction.
    Type: Application
    Filed: July 8, 2014
    Publication date: October 30, 2014
    Inventors: Frédéric BROYDE, Evelyne CLAVELIER
  • Patent number: 8630601
    Abstract: An active channelized antenna system includes an antenna array operable over a multi-octave frequency band to provide one or more antenna output signals. An electronics module includes multiplexer circuitry responsive to the one or more antenna output signals configured to divide an input signal spectrum into a plurality of frequency band components each of less than an octave bandwidth. The electronics module includes a plurality of amplifiers each of less than an octave bandwidth to provide an amplified component signal for a respective frequency band. Combiner circuitry included with the electronics module is configured to combine the amplified frequency band components into a composite signal. A transmission medium such as a coaxial cable, fiber optic line or free space, is configured to transmit the composite signal to a remotely located receiver system. The antenna system may be employed as a repeater system.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: January 14, 2014
    Assignee: Raytheon Company
    Inventors: Charles Chandler, Roger A. Conrad, Robert A. Deaton
  • Patent number: 8594644
    Abstract: A device and method for executing a reserved function using time information extracted from a broadcasting data that provides a correct time in asynchronous mobile communication terminal are provided. The method of executing a reserved function in a mobile communication terminal includes: when a broadcasting function is executed, performing (1) extracting a time information from received broadcasting data, (2) calculating a time difference between a time of the extracted time information and a corresponding operating time of the mobile communication terminal, and (3) storing the calculated time difference as a time difference information; and if a reservation time for executing a specific function is set and when the operating time reaches the set reservation time based on the stored time difference information, executing the specific function.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: November 26, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chung Kyu Lee, Hyun Woo Kim, Young Jun Jung, Ho Kwon Song, Jeong Wook Seo
  • Patent number: 8548407
    Abstract: An antenna assembly, a receiver, and a system configured to superimpose a first received signal from a first antenna and an intermediate signal based on a second received signal from a second antenna onto a single cable. The antenna assembly includes a mixer and an adjustable local oscillator (ALO) that frequency shift the second received signal to generate the intermediate signal. The output frequency of the ALO is controlled by a control signal superimposed on the single cable that is output by the receiver. With this arrangement, a plurality of antennas or antenna elements can be connected to a receiver using a single coaxial cable. Such an arrangement is particularly desirable to manufacturers of automobiles and other vehicles. Also, the receiver can detect if the output frequency of the ALO needs to be adjusted, and so close-loop control of the output frequency is possible.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: October 1, 2013
    Assignee: Delphi Technologies, Inc.
    Inventor: Glenn A. Walker
  • Patent number: 8473017
    Abstract: An adjustable monopole antenna especially intended for the mobile terminals. The adjusting circuit (930) of the antenna is located between the radiator (920) and the antenna port of a radio device and forms, together with the antenna feed conductor (901), a feed circuit. This circuit comprises an adjustable reactance between the feed conductor and the ground in series with the feed conductor or in both of those places. For example, the feed conductor can be connected by a multi-way switch to one of alternative transmission lines, which are typically short-circuited or open at their tail end and shorter than the quarter wave, each line acting for a certain reactance. The antenna operating band covers at a time only a part of the frequency range used by one or two radio systems, in which case the antenna matching is easier to arrange than of a real broadband antenna. The space required for both the radiator and the adjusting circuit is relatively small.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: June 25, 2013
    Assignee: Pulse Finland Oy
    Inventors: Zlatoljub Milosavljevic, Anne Isohätälä-Lehmikangas, Jyrki Mikkola
  • Patent number: 8422976
    Abstract: There is disclosed an antenna diversity system for relatively broadband broadcast reception in vehicles such as motor vehicles. The device can include a diversity processor having numerous components including a microprocessor for controlling a signal selection switch. In alternative embodiments the processor can be incorporated into a receiver or into a multi-antenna system. One advantage of these designs is that it is able to exist with one reception tuner and being able to select one signal from a plurality of antenna signals A1, A2, . . . AN, with great probability, whose signal components lie above the level necessary for interference-free reception, over the entire channel bandwidth B.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: April 16, 2013
    Assignee: Delphi Delco Electronics Europe GmbH
    Inventors: Heinz Lindenmeier, Stefan Lindenmeier, Jochen Hopf, Leopold Reiter
  • Patent number: 8315670
    Abstract: In an antenna interface system of a wireless network base station, each sector of the base station is outfitted with two dual-band duplexer assemblies, each of which includes a tower-mounted antenna unit, an RF filter unit (e.g., triplexer), and an RF feed or antenna cable that interconnects the two. One antenna unit transmits in one communication band, and the other transmits in a second band. Both units receive signals over the two bands. The RF filter units pass transmit data on to the cables and filter receive data of both bands for separate output. The antenna units and filter units act as cable-end interfaces for multiplexing and de-multiplexing the transmit and receive data on and off the cables. Thus, each cable carries transmit data for one communication band and receive data for both bands, for a total of two cables per sector for dual-band applications.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: November 20, 2012
    Assignee: Alcatel Lucent
    Inventor: John G. Karakis
  • Patent number: 8311503
    Abstract: Embodiments and methods and means for filtering radio frequencies (RF) via coaxial cables with a computer system are provided. Such embodiments generally include modifying an RF coaxial cables communicatively coupling an antenna to a wireless radio module within a mobile computing device allow an RF signal within certain frequency band(s) to pass with minimal attenuation while other frequencies, the RF signal is either reflected or attenuated. Modifying the RF coaxial cable entails inserting sections of varied impedance into the uniform impedance of the RF coaxial cable by altering the mechanical structure of the RF coaxial cable.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: November 13, 2012
    Assignee: Intel Corporation
    Inventors: Ulun Karacaoglu, Songnan Yang, Xintian E Lin, Anand S Konanur
  • Patent number: 8295799
    Abstract: Aspects of a method and system for identifying a radio frequency identification (RFID) tag location using a switchable coil are presented. Aspects of the systems may include one or more processors that enable selection of an inductor coil from a plurality of inductor coils. The selection of the inductor coil may be based on a change in an electromagnetic field, with respect to an initial electromagnetic field, as detected by the selected inductor coil. The processors may enable transmission of a signal, having a transmitter frequency in the UHF frequency band, via the selected inductor coil.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Amin Shameli
  • Patent number: 8260347
    Abstract: One embodiment relates to a circuit for efficient wireless communication. The circuit includes a communication port adapted to be coupled to an antenna feed. Multiple communication paths stem from the communication port, where different communication paths are associated with different frequency bands. Multiple phase shift selection circuits are respectively associated with the multiple communication paths. The phase shift selection circuits have different respective impedances relative to the communication port and the respective impedances vary for the different frequency bands. Other methods and systems are also disclosed.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: September 4, 2012
    Assignee: Intel Mobile Communications GmbH
    Inventors: Weimin Tang, Ern Tang Chu, Chao Li
  • Patent number: 8165552
    Abstract: Aspects of a method and system for identifying a radio frequency identification (RFID) tag location using a switchable coil are presented. Aspects of the systems may include one or more processors that enable selection of an inductor coil from a plurality of inductor coils. The selection of the inductor coil may be based on a change in an electromagnetic field, with respect to an initial electromagnetic field, as detected by the selected inductor coil. The processors may enable transmission of a signal, having a transmitter frequency in the UHF frequency band, via the selected inductor coil.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: April 24, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Amin Shameli
  • Patent number: 8145173
    Abstract: A receiver includes a first receiving section, a second receiving section, and a controller. A controller is operable to switch between a diversity receiving mode in which both of the first receiving section and the second receiving section are activated and a single receiving mode in which the first receiving section is activated while the second receiving section is deactivated. The controller allows the first mixer to heterodyne the signal output from the first RF amplifier with using the second oscillation signal and output the heterodyned signal in the first single receiving mode.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: March 27, 2012
    Assignee: Panasonic Corporation
    Inventors: Daisuke Nishimura, Hiroaki Ozeki, Yoshio Fuwa, Kazuyori Doumoto
  • Patent number: 8126412
    Abstract: A receiver including a processor. A plurality of Fast Fourier Transforms of a plurality of signal segments of a signal can be determined by the processor. The plurality of Fast Fourier Transforms are stored. A frequency shift of the signal can be determined recursively based on the stored plurality of Fast Fourier Transforms of the plurality of signal segments.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: February 28, 2012
    Assignee: Frantorf Investments GmbH, LLC
    Inventors: Edward A. Page, Avetis Ioannisyan, Kenneth R. Erikson
  • Patent number: 8064824
    Abstract: Processing return feeder link signals at a satellite gateway including a first and second receive antennas includes receiving first and second return feeder link signals at the first and second receive antennas, respectively, modulating a phase of the first return feeder link signal to form an adjusted first feeder link signal, combining the adjusted first feeder link signal with the second return feeder link signal to form a combined feeder link signal, detecting periodic amplitude variation in the combined feeder link signal, and shifting a phase of the first return feeder link signal to reduce periodic amplitude variation in the combined feeder link signal.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: November 22, 2011
    Assignee: ATC Technologies, LLC
    Inventor: Peter D. Karabinis
  • Patent number: 7952464
    Abstract: A multi-band and/or multi-protocol, configurable, RFID tag is provided. The tag can include one or more electrical or mechanical selectors for selecting from among multiple frequency bands and communication protocols. In some embodiments, a signal band and protocol can be detected automatically and selection among bands and protocols can be performed automatically. In some embodiments, one or more externally accessibly switches can be actuated by a user to select a band and/or protocol.
    Type: Grant
    Filed: October 5, 2006
    Date of Patent: May 31, 2011
    Assignee: Intermec IP Corp.
    Inventors: Pavel Nikitin, Venkata Kodukula, For Sander Lam
  • Patent number: 7929921
    Abstract: A wireless communications device (100) includes a primary radio frequency branch (134) and a diversity branch (136), which is enabled and disabled to balance performance and power consumption. Diversity mode operation of the device is controlled, for example, based on one or more of an estimated channel quality indicator, data reception, data rate, state or mode of the station, estimated signal to noise ratio of a pilot signal, battery power level, distance from a serving cell, among other factors.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: April 19, 2011
    Assignee: Motorola Mobility, Inc.
    Inventors: Robert T. Love, Kenneth A. Stewart
  • Patent number: 7917116
    Abstract: Certain embodiments of the invention may be found in a method and system for antenna selection diversity with prediction. An antenna diversity system may use information that it has stored on the antenna selection process in previous frames to predict the starting receiving antenna and the starting transmission antenna for the next frame. The prediction may be based on which antennas were selected in previous frames or may be based metrics associated with performance of the antennas. Prediction may be based on a majority polling scheme of previously selected antennas in a determined number of previous frames. Prediction may also be based on a weighted sum of at least one selection metric for all antennas in a determined number of previous frames. Antenna prediction provides a significant performance improvement by reducing the processing and operational overhead in cases where a transmit or a receive antenna dominates.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: March 29, 2011
    Assignee: Broadcom Corporation
    Inventors: Min Chuin Hoo, Rajendra Tushar Moorti
  • Patent number: 7907960
    Abstract: Methods and apparatus implementing spatial processing in a remote unit. In general, in one aspect, the present invention provides a remote unit, that includes a plurality of antennas and a spatial processing unit coupled to the plurality of antennas. The remote unit also includes a performance determination unit to determine a performance of the remote unit and a feedback adjustment unit to adjust feedback transmitted from the remote unit to a device, wherein the adjusted feedback accounts for performance associated with the spatial processing unit.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: March 15, 2011
    Assignee: Intel Corporation
    Inventors: Craig H. Barratt, David M. Parish, Stephen J. Sifferman
  • Patent number: 7899497
    Abstract: A system and method for improved data transmission on a wireless link to a remote receiving node includes a communication device for converting packets to RF at a physical data rate, an antenna apparatus having a plurality of antenna configurations for transmitting the RF, and a processor for selecting the antenna configuration and the physical data rate based on whether the remote receiving node indicated reception of the data transmission. The processor may determine a table of success ratios for each antenna configuration and may rank each antenna configuration by the success ratio. The processor may transmit with an unused antenna configuration to probe the unused antenna configuration and update the table of success ratios. Similarly, the processor may maintain a table of effective user data rates, rank each physical data rate by the effective user data rate and probe unused physical data rates to update the table.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: March 1, 2011
    Assignee: Ruckus Wireless, Inc.
    Inventors: William S. Kish, John Chanak
  • Patent number: 7899425
    Abstract: The present invention relates to a wireless communication device, such as a transponder, that has a plurality of antennas for multi-frequency usage. The wireless communication device comprises a control system, communication electronics, memory, and the aforementioned antennas. A wireless communication device having a pole antenna may be used with one or more loop conductor antennas to achieve the desired operating frequencies. A wireless communication device having a dipole antenna may be coupled across a loop conductor antenna to provide different loop conductor configurations depending on the frequency.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: March 1, 2011
    Assignee: Mineral Lassen LLC
    Inventor: Ian J. Forster
  • Patent number: 7881670
    Abstract: In one-tuner smart antennas, a constant amplitude representation of the antenna element wideband signal is correlated with a representation of the smart antenna output signal to give a measure of the selected channel bandpass power and desired signal power. Since only signals in the selected channel bandpass of the wideband antenna signals can be correlated with signals in the selected channel, the correlator allows only the selected channel bandpass components of the wideband antenna input signal to contribute to the correlator output. This eliminates the influence of adjacent channels/bands signals and prevents capture by strong adjacent signals. As the smart antenna adapts and reduces the selected channel bandpass interference, the measure becomes that of the desired signal power. The present invention reduces the distortion and capture of the antenna branch amplitude limiter for the weight calculation, power detection of the input power and AGC of an antenna element.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: February 1, 2011
    Inventor: Kenneth F. Rilling
  • Patent number: 7801556
    Abstract: A tunable dual-antenna system for multiple frequency band operation is disclosed, which allows a device to switch between multiple frequencies and/or multiple modes, such as CDMA and GSM. The system may comprise a tunable transmit antenna and a tunable receive antenna. One configuration may comprise multiple transmit antennas and multiple receive antennas.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: September 21, 2010
    Assignee: QUALCOMM Incorporated
    Inventor: Allen Minh-Triet Tran
  • Patent number: 7792496
    Abstract: A transmitter receiver unit of the present invention comprises a phase shifter connected between a transistor and a filter multiplexer for decreasing a reactance component of an impedance, as observed from the transistor toward the filter multiplexer, to a value close to zero in a third frequency band given as the sum or difference between the integer multiples of a second frequency band and a first frequency band. This structure decreases the impedance in the third frequency band of the filter multiplexer side as observed from the transistor, thereby making the transistor not liable to generate a signal voltage of the third frequency band.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: September 7, 2010
    Assignee: Panasonic Corporation
    Inventors: Joji Fujiwara, Michiaki Tsuneoka
  • Patent number: 7787846
    Abstract: An RF system is capable of transmitting and receiving sensor data using an ultra low power narrowband RF signal. The system handles frequency drift and other problems inherent in such a system through a spectrogram statistical analysis, dynamic programming, and narrowband filtering.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: August 31, 2010
    Inventors: Edward A. Page, Avetis Ioannisyan, Kenneth R. Erikson
  • Patent number: 7711389
    Abstract: A high frequency module for transmitting and receiving, for example, communication signals of GSM/DCS/PCS/WCDMA systems through a single antenna, is provided at a relatively small size and low cost. The high frequency module includes a diplexer arranged to separate communication signals from the antenna into GSM communication signals in lower frequency bands and POS/DOS/WODMA communication signals in higher frequency bands, a diode switch circuit that is connected to a input and output terminal of the GSM communication signal of the diplexer and is arranged to switch transmission and reception of the GSM communication signal, and a multipoint GaAsIC switch that is connected to the GSM/DCS/PCS/WCDMA communication signals of the diplexer and is arranged to switch transmission and reception of these signals. The high frequency module switches the four types of communication signals by changing the patterns of controls signals VcG, VC1, and Vc2 that are applied to the diode switch circuit and the GaAsIC switch.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: May 4, 2010
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Koji Furutani, Shinya Watanabe
  • Patent number: 7706759
    Abstract: 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 matching component. The integrated circuit includes an on-chip antenna interface that forms a first programmable impedance matching network with the at least one first off-chip impedance matching component, and forms a second programmable impedance matching network with the at least one second off-chip impedance matching component. The first programmable impedance matching network and the second programmable impedance matching network are programmable based on a frequency selection signal.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: April 27, 2010
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7706768
    Abstract: A method for switched diversity, including: determining, on a pair-wise basis, a plurality of comparative quality factors corresponding to at least two antennas based on signals received by the at least two antennas; filtering, over a period of time, multiple instances of at least one of the plurality of comparative quality factors; and selecting at least one of the signals to couple to at least one receiver chain based on the comparative quality factors.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: April 27, 2010
    Assignee: Intel Corporation
    Inventors: Sigang Qiu, Sathish K. Kumar, Atul A. Salvekar
  • Patent number: 7684759
    Abstract: The present invention is a novel device, system, and method for determining the damped natural frequencies of a dynamic system whose characteristics are available in the form of a “frequency response function” FRF. According to an exemplary embodiment of the present invention, the method identifies the dampened natural frequencies associated with the poles and zeros of a transfer function. The method is especially useful for analysis of measurements that contain some degree of contamination due to noise or non-linear effects. It is based on a set of rules that may be more successful than a direct approach based on a least squares criteria.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: March 23, 2010
    Assignee: Siemens Industry, Inc.
    Inventor: Stephen J. Yutkowitz
  • Patent number: 7684776
    Abstract: Briefly, in accordance with one embodiment of the invention, a wireless device has an array of antennas. A signal is provided to one of the antenna by two variable gain amplifiers, one of which processes a signal that is shifted in phase compared to the signal processed by the other variable gain amplifier.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: March 23, 2010
    Assignee: Intel Corporation
    Inventor: Med A. Nation
  • Patent number: 7657232
    Abstract: Embodiments of methods and means for calibrating a linearization characteristic within an RF transceiver system are provided. Such embodiments generally include extracting a portion of an output signal and frequency shifting or translating that signal by a predetermined value. The frequency shifted signal is then summed or otherwise introduced into a receiver signal pathway where it is analyzed by digital signal processing or other means to determine if linearization distortion is present. Linearization calibration of a power amplifier, a low-noise amplifier and/or other functionality within the system can then be performed in an automatic, reliable and ongoing manner.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: February 2, 2010
    Assignee: Intel Corporation
    Inventors: Georgios Palaskas, Stefano Pellerano, Ashoke Ravi
  • Patent number: 7657243
    Abstract: An RF transceiver front-end includes receiver and transmitter front-ends. The receiver front-end includes 1st and 2nd antennas, a ninety degree phase shift module and an LNA module. The 1st and 2nd antennas receive inbound RF signals and provide a first directional circular polarization. The ninety degree phase shift module phase shifts the RF signals received by the 2nd antenna. The LNA module amplifies the RF signals received by the 1st antenna and the shifted RF signals. The transmitter front-end includes a PA module and 3rd and 4th antennas, which provide a second directional circular polarization. The PA module amplifies outbound RF signals to produce amplified outbound RF signals and amplified orthogonal outbound RF signals. The 3rd antenna transmits the amplified outbound RF signals and the 4th antenna transmits the amplified orthogonal outbound RF signals.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: February 2, 2010
    Assignee: Broadcom Corporation
    Inventors: Seunghwan Yoon, Franco De Flaviis, Ahmadreza (Reza) Rofougaran
  • Publication number: 20090304118
    Abstract: A diversity receiving device includes a plurality of mixers which are provided to correspond to antennas arranged so as to be separated from each other and each of which multiplies a radio frequency signal output from the corresponding antenna by a local oscillation signal to modulate the radio frequency signal into an intermediate frequency signal; a reference signal source that generates a reference signal; a plurality of local oscillating units which are provided to correspond to the plurality of mixers, and each of which generates a local oscillation signal having a frequency corresponding to the phase of the reference signal and supplies the local oscillation signal to the corresponding mixer; a filter circuit that is provided between the reference signal source and the plurality of local oscillating units and changes the phase of the reference signal supplied to all the local oscillating units or the local oscillating units other than one local oscillating unit according to a predetermined passband freq
    Type: Application
    Filed: June 2, 2009
    Publication date: December 10, 2009
    Inventor: Dou Yuanzhu
  • Patent number: 7623835
    Abstract: The present invention relates to a wireless communication device, such as a transponder, that has a plurality of antennas for multi-frequency usage. The wireless communication device comprises a control system, communication electronics, memory, and the aforementioned antennas. A wireless communication device having a pole antenna may be used with one or more loop conductor antennas to achieve the desired operating frequencies. A wireless communication device having a dipole antenna may be coupled across a loop conductor antenna to provide different loop conductor configurations depending on the frequency.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: November 24, 2009
    Inventor: Ian J Forster
  • Patent number: 7577403
    Abstract: In one-tuner smart antennas, a representation of the antenna element wideband signal is correlated with a representation of the smart antenna output signal to give a measure of the selected channel bandpass power and desired signal power. Since only signals in the selected channel bandpass of the wideband antenna signals can be correlated with signals in the selected channel, the correlator allows only the selected channel bandpass components of the wideband antenna input signal to contribute to the correlator output. This eliminates the influence of adjacent channels/bands signals and prevents capture by strong adjacent signals. As the smart antenna adapts and reduces the selected channel bandpass interference, the measure becomes that of the desired signal power. The present invention reduces the distortion and capture of the antenna branch amplitude limiter for the weight calculation, power detection of the input power and AGC of an antenna element.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: August 18, 2009
    Inventor: Kenneth F. Rilling
  • Patent number: 7565126
    Abstract: An RF receiver system is provided having a plurality of selectable antennas. The system includes a receiver for receiving RF signals from one of the plurality of antennas at a time. The receiver includes processing circuitry for processing the RF signals and generating a control signal to control selection of one of the antennas at a time. The system further includes a switched diversity module having a plurality of switches coupled to the plurality of antennas for selecting one of the antennas at a time. The switched diversity module further includes logic receiving the control signal generated by the receiver and generating logic output signals to control selection of one of the antennas at a time.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: July 21, 2009
    Assignee: Delphi Technologies, Inc.
    Inventors: Raed S. Shatara, Jeffrey J. Marrah
  • Patent number: 7483683
    Abstract: Rejection of local oscillator harmonic response is provided in a mixing circuit with a pair of harmonic gating switches serially connected to the outputs of a balanced differential switching mixer and controlled by a gate clock signal having twice the frequency of a local oscillator signal controlling the switching mixer. An aperture or duty cycle of the gate clock signal determines which harmonic is rejected or suppressed, which is preferably a third and/or fifth harmonic since response of the balanced differential switching mixer to even harmonics is negligible. The resulting simple, efficient circuit is readily integrated directly into a phase-alternating mixer structure for a chopper-direct-conversion radio.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: January 27, 2009
    Assignee: National Semiconductor Corporation
    Inventors: Hee Wong, Michael Schwartz, James Braatz, Shu-Ing Ju
  • Patent number: 7474875
    Abstract: An apparatus including surface that includes a set of contact points, the surface to provide a medium to transmit data between a first device in contact with one or more contact points of the surface, and a second device in contact with one or more contact points of the surface. In one embodiment, the surface is to provide a medium to non-aerial wirelessly transmit data between the first and second device. In one embodiment, at least one of the first and second devices are exclusive of aerial wireless data transmission capabilities. In one embodiment, the surface is to provide a medium to transmit data between the device and a third device separated from the surface.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: January 6, 2009
    Inventors: Tal Dayan, Dan Kikinis
  • Publication number: 20080311874
    Abstract: In an antenna diversity device, at least one of the receive bands of the diversity antennas is frequency converted on the antenna side in such a way that the receive bands in the frequency spectrum are next to one another. This enables the diversity signals to be transmitted via a shared transmission medium to the receiver.
    Type: Application
    Filed: November 22, 2005
    Publication date: December 18, 2008
    Inventor: Markus Hoffmeister
  • Publication number: 20080299930
    Abstract: An integrated circuit includes a first RF section, a second RF section, a baseband section, and an antenna coupling matrix. The antenna coupling matrix is coupled to: in a first mode, couple the first RF section to a first antenna structure and couple the second RF section to a second antenna structure; in a second mode, couple the first RF section to the first antenna structure and to the second antenna structure; and in a third mode, couple the second RF section to the first antenna structure and to the second antenna structure.
    Type: Application
    Filed: August 1, 2007
    Publication date: December 4, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
  • Patent number: 7454183
    Abstract: A method and system for antenna selection diversity with dynamic gain control. A receiver selects a starting antenna and dwells on it until an incoming signal is detected. An AGC is applied on the received signal and an estimate of the received power is determined for the starting antenna. The receiver may dwell on other antennas if the signal in the first antenna is not strong enough for signal processing. The gain of an antenna may be set by the gain and power levels of the previously dwelled-on antennas and/or by a power coupling factor that exists between the antennas in an antenna switch. The receiver switches through the remaining antennas as long as necessary to select at least one of the antennas for signal processing. Dynamically adjusting the gain of antennas in a diversity system provides a more accurate and efficient antenna selection scheme.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: November 18, 2008
    Assignee: Broadcom Corporation
    Inventors: Rajendra Tushar Moorti, Min Chuin Hoo
  • Patent number: 7400872
    Abstract: In the diversity receiver, the RF switcher switches the received signals to supply them to the RSSI power detector equipped with diversity function. Subsequently, the RSSI power detector with diversity function feeds the RF switcher with an antenna switching signal. According to the determination of antennas at this instance, an IQ start-up signal for starting up the I/Q subsection is produced to make the I/Q subsection operate assuredly in response to a signal intended to receive, without operating the I/Q subsection in response to an erroneous detection of noise during processing therein, thereby eliminating useless operation.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: July 15, 2008
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Toshiharu Kogure
  • Publication number: 20080166988
    Abstract: Circuits, systems, and methods are disclosed for controlling multiple antenna receive paths in a wireless communication device. In some embodiments, the circuit may include a pair of receiving antennas, a first receive path including a VCO coupled to receive a PLL signal and a first mixer coupled to receive a first signal from the VCO and a signal from one of the antennas, and a second receive path integrated separately from the first receive path including a second mixer coupled to receive a second signal from the VCO and a signal from the other antenna. By utilizing the output of the VCO to tune the first and second mixers in the first and second receive paths to the same phase and frequency, control of the multiple antenna receive paths may be optimized.
    Type: Application
    Filed: March 13, 2008
    Publication date: July 10, 2008
    Inventors: Ronald D. Javor, Malcolm H. Smith, Nir Binshtok, Eran Segev
  • Patent number: 7395084
    Abstract: A communication system with an antenna array having a respective antenna for each of a multitude of communication modules and a control system which seiectiyely reassigns communication over a first of said multitude of communication modules to a second communication module of said multitude of communication modules in response to identification of a predicted interference within a predetermined interference matrix.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: July 1, 2008
    Assignee: Sikorsky Aircraft Corporation
    Inventor: Donald S. Anttila
  • Publication number: 20080119155
    Abstract: An improved antenna arrangement and synchronization system for use when multiple radio base stations, using a deterministic over the air MAC layer, are located within overlapping coverage areas is disclosed and more specifically the method described here discloses an improved antenna and coordination arrangement for use at the base station which will eliminate over the air collisions while doubling the effective data rate of each base station. The result being large area networks which all share exactly the same radio spectrum without mutual interference and with little effort required to expand a single base station system into a grid of cooperative base stations forming a coverage area of ubiquitous coverage and multiplied data capacity.
    Type: Application
    Filed: November 16, 2007
    Publication date: May 22, 2008
    Applicant: xG Technology, Inc.
    Inventor: Joseph A. Bobier