With Distributed Parameter-type Coupling Means Patents (Class 330/53)
  • Patent number: 10062945
    Abstract: A coupling structure for crossing three transmission lines millimeter-wave or centimeter-wave signals a signal conductor layer of a circuit substrate, the coupling structure comprising three planar cross-couplers, and from each of the three cross-couplers two input/output points of the cross-coupler being connected clockwise in succession in the plane of the cross-coupler, to respectively one input/output point of a respective other of the three cross-couplers.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: August 28, 2018
    Assignee: ROBERT BOSCH GMBH
    Inventors: Oliver Brueggemann, Matthias Steinhauer, Juan Pontes
  • Patent number: 10027296
    Abstract: A distributed amplification device with p inputs, p outputs, p amplification paths comprises a redundant reservoir of n amplifiers including n-p back-up amplifiers, an input redundancy ring and an output redundancy ring formed by rotary switches, the input and output redundancy rings sharing the same technology. The internal amplification pathways associated with the n-p back-up amplifiers frame in an interlaced manner the internal amplification pathways associated with the p nominal amplifiers and the amplification paths of the routing configurations each pass through at least five rotary switches. The input and output redundancy rings are topologically and geometrically configured and the family of the routing configurations is chosen such that the electrical lengths of all the paths of one and the same routing configuration of the family are equal.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: July 17, 2018
    Assignees: THALES, CENTRE NATIONAL D'ETUDES SPATIALES (CNES)
    Inventors: Eva Maria Gonzalez Esteban, Philippe Voisin, Aline Briand, Bertrand Onillon, Jean-Philippe Taisant
  • Patent number: 9913226
    Abstract: Digital content can be broadcast in a sideband of an analog broadcast channel using multiple digital in-band on-channel (IBOC) transceivers connected in a mesh configuration to form an IBOC mesh network. The digital IBOC transceivers are positioned at various geographic locations, so that unlike traditional “HD” radio broadcasts, the IBOC broadcast transmission is spread out over a wide area, using multiple low power digital IBOC transceivers rather than being broadcast from the same location as the analog signal. An edge transceiver associated with the mesh network can deliver different broadcast content to different transceivers, or nodes, within the mesh network, by delivering content to an intermediate node and relying on the intermediate node to propagate the content through the mesh network. The mesh network provides bi-directional communication between a mesh transceiver and a user device.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: March 6, 2018
    Assignee: iHeartMedia Management Services, Inc.
    Inventor: Jeffrey Lee Littlejohn
  • Patent number: 9913225
    Abstract: Digital content can be broadcast in a sideband of an analog broadcast channel using multiple digital in-band on-channel (IBOC) transceivers connected in a mesh configuration to form an IBOC mesh network. The digital IBOC transceivers are positioned at various geographic locations, so that unlike traditional “HD” radio broadcasts, the IBOC broadcast transmission is spread out over a wide area, using multiple low power digital IBOC transceivers rather than being broadcast from the same location as the analog signal. An edge transceiver can limit IBOC transmission power of the IBOC transceivers to a desired portion of the power used to broadcast the analog signal. The edge server can make this determination based on measurements taken at the geographically distributed digital IBOC transceivers. The IBOC mesh network provides bi-directional communication between a mesh transceiver and a user device, and can be used to deliver user feedback.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: March 6, 2018
    Assignee: iHeatMedia Management Services, Inc.
    Inventor: Jeffrey Lee Littlejohn
  • Patent number: 9887673
    Abstract: A communication device includes a power amplifier that generates power signals according to one or more operating bands of communication data, with the amplitude being driven and generated in output stages of the power amplifier. The final stage can include an output passive network that suppresses an amplitude modulation-to-phase modulation (AM-PM) distortion. During a back-off power mode a bias of a capacitive unit of the output power network component can be adjusted to minimize an overall capacitance variation. The output passive network can further generate a flat-phase response between dual resonances of operation.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: February 6, 2018
    Assignee: Intel Corporation
    Inventors: Jong Seok Park, Yanjie J. Wang, Stefano Pellerano, Christopher D. Hull
  • Patent number: 9876478
    Abstract: Apparatus and methods for wireless local area network (WLAN) power amplifiers are provided. In certain configurations, a WLAN power amplifier system includes a WLAN power amplifier, an output impedance matching network, and an envelope tracker. The WLAN power amplifier includes an input that receives a WLAN signal having a fundamental frequency and an output that generates an amplified WLAN signal for transmission over an antenna. The output impedance matching network is electrically connected to the output of the WLAN power amplifier, and can provide a load line impedance between 10? and 35? at the fundamental frequency. The envelope tracker receives an envelope of the WLAN signal, and controls a voltage level of a power supply of the WLAN power amplifier based on the envelope signal.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: January 23, 2018
    Assignee: Skyworks Solutions, Inc.
    Inventors: Hardik Bhupendra Modi, Craig Joseph Christmas, Xuanang Zhu, Mark M. Doherty
  • Patent number: 9787385
    Abstract: A distributed antenna system includes a multiple-input and multiple-output (MIMO) base station configured to output at least a first signal and a second signal. At least one master unit communicates with the MIMO base station. At least one remote unit communicates with the master unit. At least one antenna is coupled with the remote unit for receiving signals from the remote unit. A coupler element is configured for introducing a phase shift in a portion of at least the first MIMO signal and for combining the phase shifted first MIMO signal portion with a portion of the second MIMO signal and presenting the combined first and second MIMO signal portions at an output port of the coupler element. An antenna is configured for receiving the combined MIMO signal portions for transmission.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: October 10, 2017
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Luigi Tarlazzi, Samuele Brighenti, Pier Faccin
  • Patent number: 9769770
    Abstract: Digital content can be broadcast in a sideband of an analog broadcast channel using multiple digital in-band on-channel (IBOC) transceivers connected in a mesh configuration to form an IBOC mesh network. The digital IBOC transceivers are positioned at various geographic locations, so that unlike traditional “HD” radio broadcasts, the IBOC broadcast transmission is spread out over a wide area, using multiple low power digital IBOC transceivers rather than being broadcast from the same location as the analog signal. IBOC transmission power can be limited to a desired portion of the power used to broadcast the analog signal, based on measurements taken at the geographically distributed digital IBOC transceivers. The IBOC mesh network provides bi-directional communication between a mesh transceiver and a user device, and delivers user feedback received at one mesh transceiver to a feedback server by moving the user feedback through the IBOC mesh network.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: September 19, 2017
    Assignee: iHeartMedia Management Services, Inc.
    Inventor: Jeffrey Lee Littlejohn
  • Patent number: 9641140
    Abstract: A matching network and method for matching a source impedance to a load impedance is provided. A bias feed microstrip structure is coupled to a direct current (DC) voltage source and has a bias feed microstrip electrical length less than one fifth of a fundamental wavelength of a fundamental frequency component of an input signal. A harmonic impedance transformation network can be configured to compensate for parasitic reactances of a precursor element. A tuned impedance element presents a short circuit impedance at the second harmonic impedance transformation network terminal for harmonic frequency components and presents a higher impedance for the fundamental frequency component. A fundamental impedance transformation network is configured to match a fundamental impedance transformation network input impedance for the fundamental frequency component to a load impedance of a load. Multiple instances of the harmonic impedance transformation network and the tuned impedance element can be provided.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: May 2, 2017
    Assignee: NXP USA, INC.
    Inventors: Ramanujam Srinidhi Embar, Weng Chuen Edmund Neo, Yu-Ting D. Wu
  • Patent number: 9246559
    Abstract: A distributed antenna system includes a multiple-input and multiple-output (MIMO) base station configured to output at least a first signal and a second signal. At least one master unit communicates with the MIMO base station. At least one remote unit communicates with the master unit. At least one antenna is coupled with the remote unit for receiving signals from the remote unit. A hybrid coupler is coupled between the remote unit and antenna and is configured to receive the first signal Ch1 and the second signal Ch2 from the remote unit on respective first and second ports and to provide an output signal on at least one output port. The output signal includes at least a portion of the first signal and at least a portion of the second signal. The antenna is coupled with the output port.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: January 26, 2016
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Luigi Tarlazzi, Samuele Brighenti, Pier Faccin
  • Patent number: 9178262
    Abstract: A feed network includes three radio frequency (RF) devices constructed in a suspended-substrate stripline configuration that provides a five-port microwave device having a sum port and four feed ports. The three RF devices include at least one coupled-line quadrature hybrid and at least one Marchand balun. Each of the at least one coupled-line quadrature hybrid has only a single transmission line section providing two outputs with approximately equal amplitude power and a phase difference of 90°. Each of the at least one Marchand balun includes two offset-coupled transmission line sections separated by a gap and two outputs on opposite sides of the gap. The two outputs have approximately equal amplitude power and a phase difference of 180°. The three RF devices are electrically arranged relative to the sum port and the four feed ports such that the feed ports have equal amplitude power and a progressive 90° phase shift.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 3, 2015
    Assignee: Tyce Electronics Corporation
    Inventors: Bruce Foster Bishop, Kathleen Fasenfest
  • Patent number: 9172340
    Abstract: A power amplifying apparatus includes a filter that filters a predetermined frequency, a branch line provided subsequently to the filter on a substrate on which the filter is provided to distribute power, a power amplifying device provided subsequently to the branch line to amplify power, and a connecting line provided subsequently to the power amplifying device to compose power. The power amplifying apparatus may further include a directional coupler that monitors transmitted high-frequency signals.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: October 27, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Akihiro Satomi
  • Patent number: 9143103
    Abstract: Certain embodiments provide a power amplifying device including: a distribution line which distributes power; a plurality of power amplifying elements; a connection line; an output line; a filter; a first directional coupler; and a second directional coupler. The power amplifying elements is provided at a stage subsequent to the distribution line. The connection line is provided at a stage subsequent to each of the power amplifying elements and combines outputs of the power amplifying elements. The output line is connected to the connection line. The filter is placed on the connection line or the output line. The first and second directional couplers are provided at a stage subsequent to the filter. The first directional coupler outputs the high frequency signal transmitted to the output line, to a RF monitor terminal. The second directional coupler outputs the high frequency signal transmitted to the output line, to a level detection detector.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: September 22, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Akihiro Satomi
  • Patent number: 9024690
    Abstract: An amplification unit is provided. The amplification unit, comprises a first amplifier, a second amplifier, a first sensor, a first predistortion component, and a signal combiner. The first amplifier amplifies a first signal to produce a second signal. The first sensor produces a third signal based on the second signal. The second amplifier turns on and to amplifies a fourth signal to produce a fifth signal when the amplitude of the fourth signal exceeds a threshold amplitude and turns off when the amplitude of the fourth signal is less than the threshold amplitude. The first predistortion component produces the first signal based on a first input signal, based on the third signal, and based on an on-off state of the second amplifier. The signal combiner produces an output of the amplification unit based on the second signal and the fifth signal.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: May 5, 2015
    Assignee: RPX Clearinghouse LLC
    Inventors: Scott Widdowson, Gregory Bowles, Arthur Fuller
  • Patent number: 9019010
    Abstract: Combination circuitry includes a relatively small preamplifier and includes hybrid circuitry. The hybrid circuitry is configured to perform mode switching while also performing some amplification, thus allowing the relatively small preamplifier to be smaller than a conventional power amplifier. In one embodiment, the hybrid circuitry includes first series portion configured to amplify when ON, a first shunt portion, a second series portion configured to amplify when ON, and a second shunt portion. The first series portion may include: a first transistor; a first variable impedance in communication with a gate of the first transistor, wherein the first variable impedance is configured to receive a first transistor control signal; a second transistor in series with the first transistor; and a second variable impedance in communication with a gate of the second transistor, wherein second variable impedance is configured to receive a second transistor control signal.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: April 28, 2015
    Assignee: RF Micro Devices, Inc.
    Inventor: Julio Costa
  • Patent number: 8981852
    Abstract: A power amplifier includes a power amplifier core including a plurality of gain stages to receive a radio frequency (RF) signal and to output an amplified RF signal, an output network coupled to the power amplifier core to receive the amplified RF signal and output a transmit output power signal, and a directional coupler coupled to the output network to obtain a coupled signal proportional to the transmit output power signal. Each of these components can be configured on a single semiconductor die, in an embodiment.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: March 17, 2015
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Timothy Dupuis
  • Patent number: 8970294
    Abstract: A distribution amplifier with intellectual signaling comprises a first connector, a first amplifier, a second connector, a power regulator, an inductive coil, a voltage detecting circuit, a first indicating lamp, a second amplifier and a second indicating lamp. The distribution amplifier with intellectual signaling may effectively display whether the distribution amplifier operates normally or not according to the above-mentioned arrangement.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: March 3, 2015
    Assignee: Lantek Electronics, Inc.
    Inventor: Shan-Jui Lu
  • Patent number: 8902000
    Abstract: Disclosed is a signal splitting apparatus useable in a power amplifier having two or more power amplifiers. The apparatus includes a direct gain component; and a derived gain component connected to the direct gain component. The derived gain component derives the derived gain by imposing a constraint which is valid over the entire dynamic range of the input signal, e.g. the sum of the power of the direct split signal and the derived split signal are constrained to be substantially equal to the power of the input signal. The use of combining additional direct gain and derived gain components, as well as a delay element, are disclosed so as to enable n-component splitting that for adaptation to different applications by the use of suitable coefficients.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: December 2, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Chunlong Bai, Bradley John Morris
  • Patent number: 8890620
    Abstract: A power amplifier includes a first matching circuit configured to perform harmonic processing of an input signal, and a second matching circuit configured to perform the harmonic processing of an output signal, the output signal being generated by amplifying a power of the input signal. The power amplifier rotates a phase of output impedance at a matching point of the harmonic included in the generated output signal when the power of the input signal is decreased from a value higher than a certain value to a value lower than the certain value.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: November 18, 2014
    Assignee: Fujitsu Limited
    Inventors: Ken Tamanoi, Toru Maniwa
  • Patent number: 8836421
    Abstract: An output network for use with a multi-transistor amplifier circuit comprises N transistors configured to provide a Chireix outphasing behavior. The N transistors coupled to receive different amplitude and/or phase signals relative to a source signal. The output network comprises: a plurality of branches arranged in a hierarchical structure between N input nodes and an output node; at least one branch connection arranged between the input nodes and the output node, wherein each branch connection is arranged to couple first and second branches from an input side to a single branch on an output side. The hierarchical structure is arranged asymmetrically such that at least one branch connection comprises a different number of input nodes ultimately connected to its first branch compared to the number of input nodes ultimately connected to its second branch.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: September 16, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Richard Hellberg
  • Patent number: 8830008
    Abstract: A generator of a high-power modulated signal, a method for calibrating the generator, and a magnetic resonance imaging system. The generator includes means for generating a sinewave signal phase-shifted by a first variable value relative to a phase reference and a sinewave signal phase-shifted by a given fixed value added to a second variable value relative to the phase reference, the second variable value opposite to the first variable value relative to the phase reference, the variable values representative of the modulation of the radiofrequency signal, the two sinewave signals being of constant amplitude, two amplifiers each amplifying one of the sinewave signals in a congested regime, and a fixed phase shifter with a value equal to the given value of the means to generate the two sinewave signals, the fixed phase shifter coupling the signals originating from the two amplifiers to deliver the modulated radiofrequency signal.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: September 9, 2014
    Assignee: Thales
    Inventor: Bernard Darges
  • Patent number: 8823455
    Abstract: Disclosed is a matrix distributed amplifier (DA) having an input transmission line, an intermediate transmission line, and an output transmission line. A first plurality of amplifiers has inputs coupled to and spaced along the input transmission line and has outputs coupled to and spaced along the intermediate transmission line. A second plurality of amplifiers has inputs coupled to and spaced along the intermediate transmission line and has outputs coupled to and spaced along the output transmission line. A termination amplifier has an input coupled to the input transmission line and an output coupled to the intermediate transmission line. In at least one embodiment, a second termination amplifier has an input coupled to the intermediate transmission line and an output coupled to the output transmission line.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: September 2, 2014
    Assignee: RF Micro Devices, Inc.
    Inventor: Kevin W. Kobayashi
  • Patent number: 8810312
    Abstract: An apparatus and an operating method of an asymmetric Doherty power amplifier. A Doherty power amplifier apparatus includes a power divider configured to provide a power signal to a carrier amplifier and a peaking amplifier. The apparatus also includes the carrier amplifier configured to amplify a power of the signal input from the power divider. The apparatus further includes the peaking amplifier configured to have a maximum output power magnitude different from the carrier amplifier and amplify the power of the signal input from the power divider. The apparatus still further includes at least two offset transmission lines disposed at ends of the carrier amplifier and the peaking amplifier and configured to regulate a load impedance. The apparatus also includes an output combiner configured to combine and output outputs of the carrier amplifier and the peaking amplifier of different sizes.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: August 19, 2014
    Assignees: Samsung Electronics Co., Ltd., Postech Academy-Industry Foundation Postech Univ. of Science and Technology
    Inventors: Il-Du Kim, Bumman Kim
  • Patent number: 8797102
    Abstract: A high-frequency module including a power amplifying circuit includes a high-frequency power amplifying element, a matching circuit, and a driving power-supply circuit. The high-frequency power amplifying element includes a high-frequency amplifying circuit and a directional coupler. A first end of a main line of the directional coupler is connected to an output terminal of a latter-stage amplifying circuit of the high-frequency amplifying circuit. A second end of the main line of the directional coupler is connected through an output matching circuit to a high-frequency signal output terminal of the high-frequency power amplifying element. The output terminal of the latter-stage amplifying circuit is also connected to a second driving power-supply voltage application terminal of the high-frequency power amplifying element. The second driving power-supply voltage application terminal is connected to the high-frequency signal output terminal by a connecting conductor.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: August 5, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Hiroyuki Hirooka
  • Patent number: 8736365
    Abstract: A system including a power amplifier and a pre-distortion module coupled to the power amplifier. The pre-distortion module includes one or more smaller versions of the power amplifier to generate a pre-distortion signal that compensates for any memory-effect or inertia present in the power amplifier with application on frequency hopping and larger (up to 1 octave) instantaneous bandwidth communication systems.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: May 27, 2014
    Assignee: Empower RF Systems, Inc.
    Inventors: Paulo Correa, Andre A. Castro
  • Patent number: 8704592
    Abstract: A traveling wave amplifier (TWA) primarily for driving a semiconductor optical device is disclosed. The TWA of an embodiment provides a plurality of differential amplifiers of the first type and an additional differential amplifier of the second type, where are they are connected between the input and the output of the TWA. The differential amplifiers of the first type provide a first delay from the input to the output, while, the differential amplifier of the second type provide a second delay longer than the first delay between the input and the output of the TWA.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: April 22, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Taizou Tatsumi, Keiji Tanaka, Sosaku Sawada
  • Patent number: 8698557
    Abstract: A circuit for amplifying an input signal can comprise a plurality of couplers. A splitting coupler of the plurality of couplers can receive the input signal and a combining coupler of the plurality of couplers can provides an output signal. N number of amplifiers can be included in the circuit to amplify the input signal, wherein N is a non-binary integer greater than one. At least one of the plurality of couplers can comprise a hybrid coupler that has two ports terminated into substantially equal reactances.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: April 15, 2014
    Assignee: HBC Solutions, Inc.
    Inventors: George Cabrera, Dmitri Borodulin
  • Publication number: 20140070882
    Abstract: A distribution amplifier with intellectual signaling comprises a first connector, a first amplifier, a second connector, a power regulator, an inductive coil, a voltage detecting circuit, a first indicating lamp, a second amplifier and a second indicating lamp. The distribution amplifier with intellectual signaling may effectively display whether the distribution amplifier operates normally or not according to the above-mentioned arrangement.
    Type: Application
    Filed: November 15, 2012
    Publication date: March 13, 2014
    Inventor: Shan-Jui Lu
  • Patent number: 8629718
    Abstract: Disclosed is a signal splitting apparatus useable in a power amplifier having two or more power amplifiers. The apparatus includes a direct gain component; and a derived gain component connected to the direct gain component. The derived gain component derives the derived gain from the direct gain by imposing a constraint which is valid over the entire dynamic range of the input signal, e.g. the sum of the power of the direct split signal and the derived split signal are constrained to be substantially equal to the power of the input signal. The use of combining additional direct gain and derived gain components, as well as a delay element, are disclosed so as to enable n-component splitting that for adaptation to different applications by the use of suitable coefficients.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: January 14, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Chunlong Bai, John Bradley Morris
  • Patent number: 8427231
    Abstract: An amplifying device includes a signal separating unit that separates a first signal and a second signal from an input signal; a first signal-generating unit that generates, based on the first signal, a first cancelling signal that suppresses ringing caused during processing of the first signal; a first combining unit that combines the first signal and the first cancelling signal; a first amplifying unit that amplifies a signal output from the first combining unit; a second signal-generating unit that generates, based on the second signal, a second cancelling signal that suppresses ringing caused during processing of the second signal; a second combining unit that combines the second signal and the second cancelling signal; a second amplifying unit that amplifies a signal output from the second combining unit; and a third combining unit that combines a signal output from the first amplifying unit and one output from the second amplifying unit.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: April 23, 2013
    Assignee: Fujitsu Limited
    Inventor: Toshio Kawasaki
  • Publication number: 20130093509
    Abstract: A circuit for amplifying an input signal can comprise a plurality of couplers. A splitting coupler of the plurality of couplers can receive the input signal and a combining coupler of the plurality of couplers can provides an output signal. N number of amplifiers can be included in the circuit to amplify the input signal, wherein N is a non-binary integer greater than one. At least one of the plurality of couplers can comprise a hybrid coupler that has two ports terminated into substantially equal reactances.
    Type: Application
    Filed: October 12, 2011
    Publication date: April 18, 2013
    Inventors: GEORGE CABRERA, Dmitri Borodulin
  • Publication number: 20130076435
    Abstract: A system for amplifying an input signal can comprise a main amplifier to amplify a delayed version of the input signal. The system can also comprise a peak amplifier to amplify the input signal upon the input signal reaching a threshold level and disable amplification upon the input signal falling below the threshold level. The system can further comprise a voltage combiner to electromagnetically couple the output of the main amplifier and the peak amplifier, such that an output impedance at an output node of the voltage combiner is a high impedance if the input signal is below the threshold level.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 28, 2013
    Inventors: GEORGE CABRERA, DMITRI BORODULIN
  • Patent number: 8354882
    Abstract: In a Doherty amplifier (100), the amplifier's input is connected to a main device (102) via a first branch and to a peak device via a second branch. The first branch has a first frequency-dependent input impedance with a first real part and a first imaginary part. The second branch has a second frequency-dependent input impedance with a second real part and a second imaginary part. The first and second imaginary parts have opposite polarity. The first and 5 second imaginary parts have a same magnitude so as to compensate each other in the frequency band. The first imaginary part and the second imaginary part implement a first phase shift in the. first branch and a second phase shift in the second branch, respectively. The first and second phase shifts each have a magnitude of substantially 45 degrees substantially in the middle of the frequency band and are of opposite polarity.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: January 15, 2013
    Assignee: ST-Ericsson SA
    Inventor: Igor Blednov
  • Patent number: 8324965
    Abstract: The invention relates to a final stage three-way power combining amplifying circuit applied to power amplifier of a mobile communications base station system. The circuit includes at least a first power divider, a power combiner, a Doherty amplifier and a Class AB amplifier, as well as some transmission lines and phase-shift lines. A first output port of the first power divider is connected to a first input port of the power combiner via a first phase-shift line and the Doherty amplifier by concatenating them with transmission lines. A second output port of the first power divider is connected to an input terminal of a Class AB amplifier via a transmission line, an output terminal of the Class AB amplifier is connected to a second input port of the power combiner via a microstrip line, and the output terminal of the power combiner outputs an amplified radio frequency signal. The invention can meet the requirements of both high efficiency and low cost.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: December 4, 2012
    Assignee: Wuhan Gewei Electronic Technology Co., Ltd.
    Inventor: Qingnan Meng
  • Publication number: 20120249232
    Abstract: A traveling wave amplifier (TWA) primarily for driving a semiconductor optical device is disclosed. The TWA of an embodiment provides a plurality of differential amplifiers of the first type and an additional differential amplifier of the second type, where are they are connected between the input and the output of the TWA. The differential amplifiers of the first type provide a first delay from the input to the output, while, the differential amplifier of the second type provide a second delay longer than the first delay between the input and the output of the TWA.
    Type: Application
    Filed: March 23, 2012
    Publication date: October 4, 2012
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Taizou TATSUMI, Keiji TANAKA, Sosaku SAWADA
  • Publication number: 20120218040
    Abstract: According to an embodiment, a class-AB power amplifier includes an amplifying element whose power supply voltage is expressed as Vdc and whose maximum current is expressed as Imax, a conduction angle ?o of the amplifying element being more than ?(rad) and less than 2·?r(rad), and load impedance of a fundamental wave being expressed as Z1=R1+j·X1 and load impedance of a 2nd harmonic being expressed as Z2=R2+j·X2 which are observed from a dependent current source of an equivalent circuit of the amplifying element, wherein a relationship between variables X1 and R1 is set to ?R1<=X1<=R1, variable R1 is set to R1=Vdc/Imax·?·{1?cos(?o/2)}/{?o/2?sin(?o)/2}, and variable X2/X1 is set to X2/X1=?{?o/2?sin(?o)/2}/{sin(?o/2)?sin(1.5·?o)/3}, or each of the variables is set thereto so as to become equal substantially.
    Type: Application
    Filed: October 6, 2011
    Publication date: August 30, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kazutaka Takagi, Naotaka Tomita
  • Publication number: 20120126886
    Abstract: The present invention relates to an amplifier circuit where a load modulation is applied to a segmented amplifier. This will reduce the shunt loss since the loss of a segmented amplifier is reduced by allowing each amplifier segment or combination of segments to operate to their full output power capacity, rather than limited to a lower output power which results in a higher shunt loss. Hence, operation to full capacity before adding more segments is made possible by dynamically modulating the load.
    Type: Application
    Filed: September 15, 2009
    Publication date: May 24, 2012
    Inventor: Richard Hellberg
  • Publication number: 20120126887
    Abstract: In a representative embodiment, a multiple mode power amplifier that is operable in a first power mode and a second power mode. The multiple mode power amplifier comprises a first amplifying unit; a second amplifying unit; a first impedance matching network connected to an output port of the first amplifying unit; a second impedance matching network connected to an output port of the second amplifying unit and to the first impedance matching network; and a third impedance matching network connected to the output ports of the first and the second amplifying units. The third impedance matching network reduces a phase difference between signals amplified by the first and the second amplifying units in the first mode.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 24, 2012
    Applicant: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventors: Choong Soo Han, Jung Min Oh, Sang Hwa Jung
  • Patent number: 8115546
    Abstract: An apparatus and method for maximizing the performance of a peaking amplifier in a Doherty amplifier are provided. The apparatus includes a splitter, a carrier amplifier, an (N?1) number of peaking amplifiers, a Doherty combiner, and an output load. The splitter splits an input signal into an ‘N’ number of power signals. The carrier amplifier amplifies the signal provided from the splitter using a first Direct Current (DC) bias. The peaking amplifiers amplify the signals provided from the splitter using a second DC bias, which is lower than the first DC bias. When the carrier amplifier and the peaking amplifiers are all operating, the Doherty combiner forms a load impedance of the respective amplifiers such that the load impedance of the peaking amplifiers are less than the load impedance of the carrier amplifier. The output load outputs the signals amplified by the carrier amplifier and the peaking amplifiers.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: February 14, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Chul Hong, Young-Yoon Woo
  • Publication number: 20110298535
    Abstract: System and method for compensating for changes in an output impedance of a power amplifier uses an impedance compensating circuit with an impedance inverter coupled to the power amplifier. The impedance inverter of the impedance compensating circuit is configured such that an output impedance of the impedance inverter is proportional to the inverse of the output impedance of the power amplifier to compensate for changes in the output impedance of the power amplifier.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 8, 2011
    Applicant: NXP B.V.
    Inventors: Freerk Van Rijs, Alexander Otto Harm
  • Patent number: 8004371
    Abstract: Distributed band reject filters are disclosed. A first radio frequency band reject filter is disclosed having a splitter having a first input port, a first output port and a second output port, the splitter being operable on an input signal applied to the first input port to provide a respective output signal proportional to the input signal at each of the first and second output ports, the output signals having a phase shift between 45 degrees and 135 degree with respect to the input signal, as well as first, second and third acoustic resonators coupled respectively to the first input port, the first output port and the second output port.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: August 23, 2011
    Assignee: Nortel Networks Limited
    Inventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun
  • Patent number: 7932781
    Abstract: A solid state power amplifier (SSPA) system may include a radio frequency (RF) input, an RF waveguide split block, multiple monolithic microwave integrated circuit (MMIC) power amplifier modules, and/or a heat spreader. The power amplifier modules and RF waveguide may be distributed about the heat spreader in different planes. Furthermore, the power amplifier modules may be located on opposite sides of the heat spreader and nonplanar to the waveguide split block. A method for dissipating heat within an SSPA may include receiving an RF signal in a first plane, amplifying the RF signal in another plane, and combining the RF signal in yet another plane.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: April 26, 2011
    Assignee: ViaSat, Inc.
    Inventor: Noel A. Lopez
  • Publication number: 20110065472
    Abstract: An apparatus and method for amplifying a transmission signals in multiple modes and multiple bands. The apparatus includes a tunable power amplifying module adapted to receive a plurality of signal types comprising multiple modes and multiple bands. The tunable power amplifying module includes a first and second power amplifier stages and a number of tunable matching networks configured to optimize an impedance value based on the mode and band of the signal to be amplified.
    Type: Application
    Filed: October 16, 2008
    Publication date: March 17, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Xu Zhu, Michael L. Brobston, Lup M. Loh
  • Patent number: 7884668
    Abstract: The present invention relates to an integrated Doherty type amplifier arrangement and an amplifying method for such an arrangement, wherein a lumped element hybrid power divider (12) is provided for splitting input signals of main and peak amplifier stages (20, 30, 40) at predetermined phase shifts and non-equal division rates and at least one wideband lumped element artificial line (Z 1, Z2) combined with wideband compensation circuit for receiving said first amplified signal and for applying said predetermined phase shift to said first amplified signal and its higher harmonics. Thereby, the low gain of the peak amplifier is compensated by providing the non-equal power splitting at the input. Moreover, the use of the lumped element hybrid power divider leads to an improved isolation between the input ports of the main and peak amplifiers decreasing final distortions of the output signal.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: February 8, 2011
    Assignee: NXP B.V.
    Inventor: Igor Blednov
  • Patent number: 7843270
    Abstract: A low noise amplifier circuit including a front end voltage sensing and matching amplification circuit, a gain circuit and a combining circuit is disclosed. The front end voltage sensing and matching amplification circuit includes an input and two outputs and provides a matched signal at each output. The gain circuit includes two inputs, each input being respectively coupled to at least one of the two outputs of the front end voltage sensing and matching amplification circuit. The gain circuit further includes two outputs and an output signal is provided at each output of the gain circuit. The combining circuit combines the two output signals of the gain circuit. The combining circuit includes two inputs, each input is respectively coupled to at least one of the two outputs of the gain circuit. The combining circuit further includes an output providing a combined signal.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: November 30, 2010
    Assignee: Nanyang Technological University
    Inventors: Qiang Li, Yue Ping Zhang
  • Patent number: 7804358
    Abstract: A device with shared power amplifiers for use in a wireless telecommunication System. A plurality of input signals are tapered to alter the phase and/or amplitude distribution between the signals and are then distributed over the input ports of a plurality of power amplifiers. Power amplified replicas of the plurality of input signals are recreated at the output ports of the power amplifiers. The power amplified replicas of the signals are reverse tapered at an output of the device.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: September 28, 2010
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Sven Petersson, Ulrika Engström, Martin Johansson
  • Patent number: 7755430
    Abstract: A splitter circuit improves isolation between output ports. The splitter circuit comprises input port 1, output port 2, output port 3, FET 6, FET 11 and an impedance circuit. FET 6 is provided between input port 1 and output port 2 and adapted to amplify a signal at input port 1 to output an amplified signal to output port 2. FET 11 is provided between the input port 1 and the output port 3 and adapted to amplify a signal at input port 1 to output an amplified signal to the output port 3. The impedance circuit couples the output ports 2 and 3, and includes a first series circuit including inductor 15 and diode 17, series connected to each other, a second series circuit including inductor 16 and diode 18, series connected to each other, and resistor 19. The first series circuit has one end connected to output port 2 and the second series circuit has one end connected to output port 3. The resistor is connected between the other ends of the first and second series circuits and the ground.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: July 13, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Kazuyuki Imagawa
  • Patent number: 7746175
    Abstract: A power amplifier (power amplifier) having multiple solid state sub-amplifiers connected in parallel between the power amplifier input and the power amplifier output are described. The signal input to the power amplifier is provided to an RF splitter connected between the power amplifier input connector and the input of each of the sub-amplifiers. The RF splitter splits the input power from the signal input and provides the power to the sub-amplifier inputs through input electrical paths. The input electrical paths from the power amplifier input to the sub-amplifiers are substantially physically identical. Each of the sub-amplifiers drive an input of an RF combiner connected between the outputs of the sub-amplifiers and the output of the power amplifier. The RF combiner combines the output power from each of the sub-amplifiers through output electrical paths, and provides the combined power to the power amplifier output.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: June 29, 2010
    Assignee: Keragis Corporation
    Inventor: Robert M. Rector
  • Patent number: 7737786
    Abstract: The present invention relates to the field of electronic devices known as baluns. It concerns an active balun which is broadband and reciprocal. Embodiments of the invention integrate an active splitter balun with an active combiner balun so as to form three transmission lines. A first active coupling is provided between the first and second transmission lines and a second active coupling is provided between the first and third transmission lines. The active couplings are provided by means of amplifier cells distributed along the transmission lines. Embodiments of the invention have configurable means for polarizing the different amplifier cells so as to create a specific coupling direction between the various transmission lines. The device according to the invention can be applied in the field of broadband mixers which are used, notably, in radio transmission and reception circuits.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: June 15, 2010
    Assignee: Thales
    Inventors: Jean-Philippe Plaze, Philippe Dueme, Benoit Mallet-Guy
  • Patent number: 7667538
    Abstract: A differential amplifier comprises terminals for receiving signals, and outputting a signal, and differential pairs, each having an input and output pair, the differential pairs supplied with currents, respectively, a load circuit connected to the differential pairs, an amplifier stage for receiving input, a signal of at least one connection node of the load circuit and output pairs of the differential pairs, the amplifier stage having an output connected to a terminal and a connection switching circuit for controlling switching between connection states of a first differential pair and second differential pair.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: February 23, 2010
    Assignee: NEC Corporation
    Inventor: Hiroshi Tsuchi