For Providing Adjustable Coupling Patents (Class 333/111)
  • Patent number: 10784557
    Abstract: In one example, a signal processing circuit including a directional coupler and a termination part is disclosed. The directional coupler includes a main line as a transmission path of an RF signal and a sub-line constituting a coupled line together with the main line. The termination part includes devices connectable between ground and a first port at an end of the sub-line. The signal processing circuit switches, depending on a frequency of the RF signal, the devices of the termination part to be connected to the first port. The phase of a return signal of a signal input as a coupling signal to the termination part via the first port is opposite to the phase of an isolation signal supplied to a second port at the other end of the sub-line and connected to an output port of the coupling signal.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: September 22, 2020
    Assignee: Sony Semiconductor Solutions Corporation
    Inventors: Kenji Noguchi, Kazumasa Kohama
  • Patent number: 10742189
    Abstract: An electromagnetic coupler apparatus includes a plurality of couplers, each having a coupled port and an isolation port. The coupler apparatus includes an output port configured to provide a coupled signal from one or more of the plurality of couplers, and a number of selection control inputs. Each of the selection control inputs is configured to control one or more switches to select an individual one of the plurality of couplers to provide at least a portion of the coupled signal at the output port.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: August 11, 2020
    Assignee: SKYWORKS SOLUTIONS, INC.
    Inventors: Nuttapong Srirattana, Zhiyang Liu, David Ryan Story
  • Patent number: 10715089
    Abstract: A circuit with co-matching topology for transmitting and receiving RF signals for return loss improvement, wherein when transmitting RF signals, the LNA is turned off and the capacitance of an adjustable capacitive component is adjusted for transmitting RF signals, and when receiving RF signals, the power amplifier and the adjustable capacitive component are turned off, wherein a matching network is designed in favor of the LNA for receiving RF signals while the adjustable capacitive component can adjust the overall impedance of the circuit including the matching network that is also used when transmitting RF signals and the adjustable capacitive component for improving the transmitting return loss.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: July 14, 2020
    Assignee: Rafael Microelectronics, Inc.
    Inventor: Kuan-Ming Chen
  • Patent number: 10170822
    Abstract: According to one embodiment, a communication device is described comprising an antenna, a signal path for supplying a signal to the antenna, two directional couplers arranged within the signal path, wherein each directional coupler is coupled to an adjustable impedance defining the characteristic impedance of the directional coupler, a controller configured to set, for each of a plurality of impedances, the adjustable impedances of the directional couplers to the impedance, a return loss measurement circuit configured to determine, for each of the plurality of impedances, a return loss of the signal path when the adjustable impedances of the directional couplers are set to the impedance and a load impedance determination circuit configured to determine a load impedance of the signal path based on the determined return losses.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: January 1, 2019
    Assignee: Infineon Technologies AG
    Inventors: Valentyn Solomko, Anthony Thomas, Winfried Bakalski, Ruediger Bauder
  • Patent number: 9960472
    Abstract: A continuously manually or remotely adjustable microwave attenuator and linear phase shifter uses a mobile signal coupler (wave-probe) and a slabline structure terminated with 50 Ohms. The coupled port of the wave-probe is connected with the output port of the unit using flexible RF cable. The wave-probe is attached to the vertical axis of a mobile carriage, which is moved at variable distance from the input port, corresponding to the expected transmission phase, whereas the depth, at which the wave-probe is inserted into the slabline, determines the coupling factor and thus the value of the attenuation. Amplifier and low pass filters compensate for coupling loss and equalize for frequency slope.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: May 1, 2018
    Inventor: Christos Tsironis
  • Patent number: 9503044
    Abstract: The present disclosure relates to a reconfigurable directional coupler with a variable coupling factor that can be changed in value as a function of a desired transmit band of operation. The reconfigurable directional coupler includes a primary inductive segment, secondary inductive segments, and switch circuitry configured to change the total coupling capacitance formed between the primary and secondary inductive segments by selectively switching the secondary inductive segments into the secondary signal path. Simultaneously, the mutual inductance and coupling factor between the primary and the secondary inductive segments are reconfigured.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: November 22, 2016
    Assignee: Qorvo US, Inc.
    Inventors: Marcus Granger-Jones, Baker Scott, Ali Tombak
  • Patent number: 9484613
    Abstract: One or more embodiments of the present invention describe an apparatus and method to combine unequal powers. The apparatus includes a first input port, a second input port, and a combiner. The first input port is operably connected to a first power amplifier and is configured to receive a first power from the first power amplifier. The second input port is operably connected to a second power amplifier and is configured to receive a second power from the second power amplifier. The combiner is configured to simultaneously receive the first power from the first input port and the second power from the second input port. The combiner is also configured to combine the first power and second power to produce a maximized power. The first power and second power are unequal.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: November 1, 2016
    Assignee: United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Rainee N Simons, Christine T Chevalier, Edwin G Wintucky, Jon C Freeman
  • Patent number: 9397380
    Abstract: A guided wave applicator comprising two electrically conductive waveguide walls and a waveguide dielectric. The volume of the waveguide dielectric is composed of non-gaseous dielectric material and is positioned between the two waveguide walls. The waveguide dielectric includes first and second longitudinal ends and includes first, second, third and fourth sides extending longitudinally between the two longitudinal ends. The first waveguide wall is positioned so that it covers the first side of the waveguide dielectric, and the second waveguide wall is positioned so that it covers the second side of the waveguide dielectric. In operation, electrical power can be supplied to one or both longitudinal ends of the waveguide dielectric, whereby the power can be coupled to a plasma through the exposed sides of the waveguide dielectric.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: July 19, 2016
    Assignee: Applied Materials, Inc.
    Inventors: Jozef Kudela, Tsutomu Tanaka, Carl A. Sorensen, Suhail Anwar, John M. White
  • Patent number: 9306656
    Abstract: There is provided apparatus for propagation of a wireless signal through a barrier comprising a first antenna for location on a first side of the barrier, a second antenna for location on a second side of the barrier and a waveguide. The waveguide comprises a conducting member passing through the barrier between the first and second sides. The conducting member is held within an insulator sleeve such that it is spaced from a surrounding metal wall of the waveguide. A wireless signal received by the waveguide on the first side of the barrier is transmitted through the barrier by Transverse Electro-Magnetic (TEM) mode propagation along the waveguide is re-radiated on the second side.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: April 5, 2016
    Assignee: ROLLS-ROYCE plc
    Inventors: Max Chien Yee Ong, Haydn Ashley Thompson, Huw Llewelyn Edwards
  • Patent number: 9300026
    Abstract: An improved nondirectional radiofrequency power divider is characterized by the following features: —having an outer conductor (1) and/or outer conductor housing (1?), with a first inner conductor (11), wherein the first inner conductor (11) runs in the outer conductor (1) or in the outer conductor housing (1?), —with a second inner conductor (13), wherein the second inner conductor (13) runs in the space (15) which is formed between the first inner conductor (11) and the outer conductor (1) or the outer conductor housing (1?), —the second inner conductor (13) is electrically connected to a branch line running away therefrom or is provided therewith, the second inner conductor (13) is relatively adjustable and/or positionable in terms of the distance of said second inner conductor from the first inner conductor (11) and/or in terms of the distance of said inner conductor from the outer conductor (1) or from the outer conductor housing (1?) so as to effect a variable power distribution.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: March 29, 2016
    Assignee: KATHREIN-WERKE KG
    Inventors: Thomas Haunberger, Manfred Stolle, Claudia Daurer
  • Patent number: 9257736
    Abstract: The present invention features a broadband radio frequency (RF) device in the form of a power splitter. A broadband spiral transmission line power divider is used to divide power into two powers with a constant phase difference between the two divided powers. The power divider produces large bandwidths.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: February 9, 2016
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Michael J. Josypenko
  • Publication number: 20150091668
    Abstract: In accordance with an embodiment, a directional coupler includes a coupler circuit and at least one amplifier coupled between a coupler circuit isolated port and a directional coupler isolated port and/or between a coupler circuit coupled port and a directional coupler coupled port. In various embodiments, the directional coupler is disposed over and/or in a substrate.
    Type: Application
    Filed: October 1, 2013
    Publication date: April 2, 2015
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: Valentyn Solomko, Winfried Bakalski, Nikolay Ilkov
  • Publication number: 20140266499
    Abstract: An adjustable directional coupler circuit includes a directional coupler and a correction circuit. The directional coupler includes a first port for receiving an input signal; a second port for outputting the input signal to a load; a third port for outputting a first coupled signal including a desired first coupled signal proportional to forward power of the input signal and an extraneous first coupled signal proportional to reverse power of a reflected signal; and a fourth port for outputting a second coupled signal including a desired second coupled signal proportional to the reverse power and an extraneous second coupled signal proportional to the forward power. The correction circuit adjusts magnitude and phase of a sample of the second coupled signal to provide an adjusted second coupled signal, and to sum the adjusted second coupled signal and the first coupled signal to cancel the extraneous first coupled signal.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: AGILENT TECHNOLOGIES, INC.
    Inventor: Terrence R. Noe
  • Publication number: 20140248837
    Abstract: A device according to one embodiment includes a variable-capacitor-tuned isolation tuning circuit having a directional coupler having an input port, an output port, an isolation port, and a coupling port. The variable-capacitor-tuned isolation tuning circuit also has and a tunable capacitor coupled in shunt to the coupling port of the directional coupler.
    Type: Application
    Filed: March 3, 2014
    Publication date: September 4, 2014
    Applicant: Applied Wireless Identifications Group, Inc.
    Inventor: Liming Zhou
  • Publication number: 20140111285
    Abstract: Embodiments of coupler systems (10) include a directional coupler (12), a tuning element (14a, 14b), and an actuator (16a, 16b). The coupler (12) is configured to split an input signal into two output signals or, alternatively, to combine two input signals into a single output. The tuning element (14a, 14b) is a capacitive device that allows the frequency response of the coupler (12) to be varied, so that the coupler (12) can be tuned to a particular frequency or range of frequencies at a given operating condition. The actuator (16a, 16b) generates a mechanical force that actuates tuning element (14a, 14b).
    Type: Application
    Filed: October 18, 2012
    Publication date: April 24, 2014
    Applicant: HARRIS CORPORATION
    Inventor: John E. Rogers
  • Patent number: 8704575
    Abstract: Active directional couplers are provided. In accordance with certain embodiments of the invention, the subject active directional couplers are tunable. The tuning is accomplished via varactors connected to the lines of the active directional couplers. Active directional elements are provided between different lines of the subject active directional couplers to control a signal path between ports of the different lines. The active directional elements are selected from diodes, transistors, inverting amplifiers, non-inverting amplifiers, differential amplifiers, and active baluns. The lines include a phase shift element between the two ports of each line. The phase shift element is selected from a transmission line, a delay line, and a phase shifter. Advantageously, the subject lines do not have to be designed for ideal phase shifting and can be designed at near 90° or near ?/4 values.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: April 22, 2014
    Assignee: University of Florida Research Foundation, Incorporated
    Inventors: Byul Hur, William Richard Eisenstadt
  • Patent number: 8611845
    Abstract: This invention describes a method by which the output power of a circuit or system at any point can be efficiently and cost effectively sampled in a simple and broadband fashion for processing in a closed loop system for applications such as power level control in very broadband circuits. A divider circuit consisting of a selection of passive lumped elements is used to create a very broadband means of sampling the RF power level at any point in a transmission line. Unlike prior art schemes of this nature, this circuit does not rely upon extremely accurate element values and minimization of parasitic reactances. Used in conjunction with a balanced detector-logarithmic or other amplifier combination this invention result in a very broadband low cost simplified realization of the traditional costly bandwidth limited directional coupler-detector combination.
    Type: Grant
    Filed: February 11, 2012
    Date of Patent: December 17, 2013
    Inventor: Anand Ganesh Basawapatna
  • Publication number: 20130285763
    Abstract: This disclosure relates to hybrid couplers for radio frequency (RF) signals. The hybrid coupler includes a first port, a second port, a third port, a fourth port, a first inductive element connected from the first port to the third port, and a second inductive element connected from the second port to the fourth port. The hybrid coupler further includes a first capacitive element and a second capacitive element. The first capacitive element is connected between an intermediary node of the first inductive element and either the first port or the third port, while the second capacitive element is coupled between an intermediary node of the second inductive element and either the second port or the fourth port. Accordingly, the first capacitive element and a portion of the first inductive element and the second capacitive element and a portion of the second capacitive element each form a harmonic trap.
    Type: Application
    Filed: June 25, 2013
    Publication date: October 31, 2013
    Inventors: Marcus Granger-Jones, Michael F. Zybura, Ruediger Bauder
  • Patent number: 8558640
    Abstract: A directional coupler includes a dielectric substrate having at least an input terminal and an output terminal on a surface thereof, a main line disposed in the dielectric substrate and extending between the input terminal and the output terminal, a first coupling line for monitoring a level of an input signal which is input through the input terminal, the first coupling line being disposed in the dielectric substrate and having an end electrically connected to a first terminating resistor, and a second coupling line for monitoring a level of a reflected signal which is input through the output terminal, the second coupling line being disposed in the dielectric substrate and having an end electrically connected to a second terminating resistor.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: October 15, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Takami Hirai, Shinsuke Yano, Takanobu Saka
  • Publication number: 20130207741
    Abstract: A programmable directional coupler to detect incident power and possibly reflected power is disclosed. The programmable directional coupler includes first and second inductors and at least one adjustable capacitor. The first inductor is coupled between first and second nodes, and the second inductor is coupled between third and fourth nodes of the programmable directional coupler. The second inductor is magnetically coupled to the first inductor and has a mutual inductance with the first inductor. The at least one adjustable capacitor is coupled between the first and second inductors. The programmable directional coupler may further include at least one fixed or adjustable capacitor coupled between at least one node among the first, second, third and fourth nodes and circuit ground. The programmable directional coupler may further include an adjustable resistor coupled between the fourth node and circuit ground.
    Type: Application
    Filed: February 13, 2012
    Publication date: August 15, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventor: Calogero D, Presti
  • Publication number: 20130201882
    Abstract: This disclosure includes embodiments of a tunable hybrid coupler. The tunable hybrid coupler includes a first inductive element having a first inductance, a second inductive element having a second inductance and mutually coupled to the first inductive element, a first variable capacitive element having a first variable capacitance, and a second variable capacitance having a second variable capacitance. The first variable capacitive element is coupled between a first port and a second port. The second variable capacitive element is coupled between a third port and a fourth port. The first inductive element is coupled from the first port to the third port, while the second inductive element is coupled from the second port to the fourth port. Accordingly, the tunable hybrid coupler may form an impedance matching network that is tunable to different RF communication bands. The tunable hybrid coupler may thus be included in a tunable RF duplexer.
    Type: Application
    Filed: February 6, 2013
    Publication date: August 8, 2013
    Applicant: RF MICRO DEVICES, INC.
    Inventor: RF MICRO DEVICES, INC.
  • Publication number: 20130141183
    Abstract: A directional coupler is disclosed integrated on a single chip and an integrated circuit based on a standard CMOS process and relates to a field of radio frequency communication. In exemplary implementations, by using a standard CMOS process technology, the directional coupler integrated by a CMOS process is formed by a coil winded by a upper layer of metal lines, a coil winded by a lower layer of metal lines, two tuning capacitor array, and a matching resistor. Two terminals of the coil are a direct terminal and an input terminal; two terminals of the coil are a coupled terminal and an isolation terminal; the terminals of the coils and are intersected at 90°; the coil is winded by an upper metal layer and the coil is winded by a lower metal layer. Further, the insertion loss is low and the isolation degree is large.
    Type: Application
    Filed: April 16, 2012
    Publication date: June 6, 2013
    Applicant: PEKING UNIVERSITY
    Inventors: Le Ye, Jiayi Wang, Huailin Liao, Ru Huang
  • Patent number: 8422947
    Abstract: A communication device includes a communication circuit part, a transmission path for signals, a ground, a coupler electrode, and a resonance part. The coupler electrode includes an upper flat part as an electrode, a support, and a connecting portion. The support supports the upper flat part. Thus, the upper flat part faces the ground and is separately placed therefrom at a height only enough to ignore the wavelength of the signal, while having a flexible portion which is elastically deformable in the height direction. On the connecting portion, the other end of the support is connected to the transmission path. The resonance part enlarges a current flowing into the coupler electrode through the transmission path. A micro dipole is a line segment connecting between the center of accumulated electric charge in the coupler electrode and the center of mirror charge accumulated in the ground.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: April 16, 2013
    Inventor: Satoshi Konya
  • Publication number: 20120280763
    Abstract: Methods and systems for processing signals via directional couplers embedded in a package are disclosed and may include generating via a directional coupler, one or more output RF signals that may be proportional to a received RF signal. The directional coupler may be integrated in a multi-layer package. The generated RE signal may be processed by an integrated circuit electrically coupled to the multi-layer package. The directional coupler may include quarter wavelength transmission lines, which may include microstrip or coplanar structures. The directional coupler may be electrically coupled to one or more variable capacitances in the integrated circuit. The variable capacitance may include CMOS devices in the integrated circuit. The directional coupler may include discrete devices, which may be surface mount devices coupled to the multi-layer package or may be devices integrated in the integrated circuit. The integrated circuit may be flip-chip bonded to the multi-layer package.
    Type: Application
    Filed: July 19, 2012
    Publication date: November 8, 2012
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8228136
    Abstract: A coupling loop with each leg connected by two resistors, R1 and R2 going to ground on a disk shaped printed circuit board provides a directional coupler with directivity tuned by rotating this disk assembly and coupling controlled by the distance to the main RF transmission line. Once the desired level of directivity is obtained, this board is locked with screws from the top.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: July 24, 2012
    Assignee: Powerwave Technologies, Inc.
    Inventor: Purna C. Subedi
  • Patent number: 8203398
    Abstract: One aspect of the invention includes a directional coupler having a coupling factor in the forward direction determined from the equation Cf=Cf·ej?Cf, a coupling factor in the reverse direction determined from the equation Cr=Cr·ej?Cr, an isolation in the forward direction determined from the equation If=If·ej?If, and an isolation in the reverse direction determined from the equation Ir=Ir·ej?Ir, wherein at least one condition is met from among the group consisting of: (1) the absolute value of ??=?Cr+?Cf?(?Ir+?If) being less than or equal to 20°, K = C f C r * I r I f ( 2 ) is less than or equal to 1.6, and (3) Cf=Cr and If=Ir.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: June 19, 2012
    Assignee: Huettinger Elektronik GmbH + Co. KG
    Inventors: Ekkehard Mann, Christoph Gerhardt, Christian Thome, Christian Wangler, Daniel Krausse, Stephan Guenther, Rolf Weber
  • Patent number: 8020130
    Abstract: In a timing analysis apparatus for use in a semiconductor integrated circuit, which analyzes operation timing of a semiconductor integrated circuit having a logic gate circuit including a plurality of logic gates, a controller detects at least one of a power supply voltage and a ground voltage of a power supply, decomposes the noise waveform into frequency components, classifies the frequency components into low-frequency components lower than a predetermined threshold frequency and high-frequency components higher than the threshold frequency, calculates a static delay time of each of the logic gates due to the low-frequency components, calculates a dynamic delay time of each of the logic gates due to the high-frequency components, and determines a delay time of each of the logic gates by synthesizing the calculated respective delay times.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: September 13, 2011
    Assignee: Semiconductor Technology Academic Research Center
    Inventor: Makoto Nagata
  • Patent number: 7859361
    Abstract: In a directional coupler with two coupled lines arranged in a flat chamber of an enclosed metal housing within the coupling region side-by-side in the longitudinal direction and at a spacing distance from one another, of which the ends are connected to connecting ports attached at the sides of the metal housing, these coupled lines include flat, sheet-metal strip conductors, which are arranged within the coupling region with their broad sides facing towards one another side-by-side at a spacing distance and held by several support elements made of insulating material in a cantilever manner at a spacing distance from the opposing internal walls of the flat metal-housing chamber within the latter. In this context, at least one strip conductor is curved relative to the opposing strip conductor in such a manner that the spacing distance of the strip conductors in coupling region increases starting from the beginning of the coupling region approximately exponentially up to the end of the coupling region.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: December 28, 2010
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Christian Evers, Ralf Juenemann, Alexander Bayer, Markus Leipold
  • Publication number: 20100277369
    Abstract: The present invention relates to directional couplers for microwave signals, and in particular to a combline directional coupler (301) for use at millimetre wavelengths. The combline microwave coupler (301) comprises a first transmission line (202), and a second transmission line (203), each transmission line including along its length a series of stubs (206, 207), the stubs of the first and second transmission lines being oriented in a combline pattern with each other such that in use microwave energy passing along one transmission line is coupled to the other. The coupler also includes four ports one at each end of the transmission lines for coupling microwave signals into or from said transmission lines, including at the first end of the combline pattern a first port to the first transmission line, and a second port to the second transmission line, and including at the second end of the combline pattern a third port to the first transmission line and a fourth port to the second transmission line.
    Type: Application
    Filed: November 24, 2008
    Publication date: November 4, 2010
    Inventors: David John Gunton, Arthur Glyn Stacey
  • Publication number: 20100225415
    Abstract: A coupling loop with each leg connected by two resistors, R1 and R2 going to ground on a disk shaped printed circuit board provides a directional coupler with directivity tuned by rotating this disk assembly and coupling controlled by the distance to the main RF transmission line. Once the desired level of directivity is obtained, this board is locked with screws from the top.
    Type: Application
    Filed: March 2, 2010
    Publication date: September 9, 2010
    Inventor: Purna C. Subedi
  • Patent number: 7671700
    Abstract: A hollow waveguide directional coupler comprises two hollow waveguide sections that are coupled to each other by a plurality of coupling openings formed in a wall extending between the hollow waveguide sections. Two adjacent coupling openings have a distance of 3?g/4. from each other, ?g being the wavelength of the nominal center frequency of the operating frequency range of the directional coupler.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: March 2, 2010
    Assignee: Ericsson AB
    Inventors: Uwe Rosenberg, Konstantinos Beis
  • Patent number: 7649429
    Abstract: A controller sends signals to an electromagnetic coupler associated with a bus. The signals are arranged to set a coupling strength of the coupler.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: January 19, 2010
    Assignee: Intel Corporation
    Inventors: Thomas D. Simon, Rajeevan Amirtharajah, John R. Benham
  • Patent number: 7576625
    Abstract: A millimeter-band switching circuit easily corrects a varied off capacitance of a switching element without shifting position of the switching element. The millimeter-band switching circuit includes: a coupling line having a line length that can be changed; a first input and output terminal; a second input and output terminal; a first transmission line connected between the first input and output terminal and a first end of the coupling line; a second transmission line connected between the input and output terminal and a second end of the coupling line; a first field effect transistor (FET) connected in parallel with the first transmission line; and a second FET connected in parallel with the second transmission line and turned ON/OFF simultaneously with turning ON/OFF of the first FET.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: August 18, 2009
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yoshihiro Tsukahara
  • Patent number: 7538635
    Abstract: Four variable reactance means are connected, respectively, to the four ports of a quadrature hybrid circuit which is composed of four ring-linked two-port circuits each composed of a transmission line or multiple lumped reactance elements, so that by changing the reactance values of the four variable reactance means, operating frequency of the quadrature hybrid circuit can be selectively changed.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: May 26, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Atsushi Fukuda, Hiroshi Okazaki, Shoichi Narahashi
  • Publication number: 20090045887
    Abstract: A directional coupler with two sensing conductors and a basic coupler and a supplementary coupler corresponding to them. The basic coupler is based on the coupling between a first sensing conductor (421) and the transmission conductor (410), and the supplementary coupler is based on the coupling between a second sensing conductor (422) and the transmission conductor. The sensing conductors are substantially shorter than a quarter wave, because of which the directivity of both the basic and the supplementary coupler is low. The other ends of the sensing conductors are connected to each other and further to the measurement port of the directional coupler. The coupling signals caused by a reverse signal in the connecting point of the sensing conductors are arranged equal by their absolute value but oppositely phased, in which case their sum signal in the measurement port is insignificantly small.
    Type: Application
    Filed: August 26, 2008
    Publication date: February 19, 2009
    Applicant: Powerwave Comtek Oy
    Inventor: Matti Tervo
  • Patent number: 7474172
    Abstract: A wiper-type variable power divider with capacitive junctions to minimize the creation of passive intermodulation interference (PIM) during adjustment of the power divider. The variable power divider includes an adjustable, wiper-type phase shifter connected to a hybrid power divider. The output ports of the hybrid power divider produce two RF signals having variable and complementary power amplitudes as the power divider is adjusted throughout its adjustment range. The power divider output signals also have a sum that is substantially equal to a constant quantity throughout the adjustment range of the power divider. The phase shifter is well suitable for use in a base station antenna, where it can be used for be beam steering and beam width adjustment. The variable power divider can also be operated by remote control of a motorized actuator that operates the power divider.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: January 6, 2009
    Assignee: Andrew Corporation
    Inventor: Donald L. Runyon
  • Patent number: 7411470
    Abstract: A controller sends signals to an electromagnetic coupler associated with a bus. The signals are arranged to set a coupling strength of the coupler.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: August 12, 2008
    Assignee: Intel Corporation
    Inventors: Thomas D. Simon, Rajeevan Amirtharajah, John R. Benham
  • Publication number: 20080143613
    Abstract: An antenna apparatus includes a first feeding point and a second feeding point provided at respective positions on an antenna element. The antenna element is excited through the first and second feeding points simultaneously so as to operate as a first antenna portion and a second antenna portion simultaneously, the first antenna portion and the second antenna portion correspond to the first and second feeding points, respectively. The antenna element further includes, between the first and second feeding points, an electromagnetic coupling adjuster for making an amount of isolation between the first and second antenna portions.
    Type: Application
    Filed: December 5, 2007
    Publication date: June 19, 2008
    Inventors: Hiroshi IWAI, Atsushi Yamamoto, Tsutomu Sakata, Satoru Amari
  • Patent number: 7307492
    Abstract: An apparatus that includes a first conducting strip having a narrowed width where the first conducting strip also acts as a first electrode for a first tapping capacitance. The first tapping capacitance has a second electrode that is: 1) parallel to the first conducting strip; and 2) closer to the first conducting strip than a second conducting strip. The second conducting strip is parallel to the first conducting strip and has a narrowed width where the second conducting strip also acts as a first electrode for a second tapping capacitance. The second tapping capacitance has a second electrode that is: 1) parallel to the second conducting strip; and 2) closer to the second conducting strip than the first conducting strip.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: December 11, 2007
    Assignee: Intel Corporation
    Inventors: Alok Tripathi, Dennis J. Miller
  • Patent number: 7221239
    Abstract: A variable power divider and method can vary the RF power between ports in a high power and multi-carrier RF environment, such as is used in controlling signals sent and received in a base station antenna. The variable power divider can include a single-control phase shifter and a hybrid power divider. The single-control phase shifter can comprise a three-port device having a single input port and two output ports. The single-control phase shifter can further comprise a variable adjuster that can change or adjust the phase between two RF signals. The hybrid power divider can comprise a four-port device having two input ports and two output ports. Both the single-control phase shifter and the hybrid power divider can comprise substantially planar structures that are suitable for high-speed manufacturing. The output ports of the hybrid power divider can be coupled to various devices such antennas or power absorbing elements.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: May 22, 2007
    Assignee: Andrew Corporation
    Inventor: Donald L. Runyon
  • Patent number: 7212077
    Abstract: A device for signal transmission between units that are movable along given tracks comprises at least one transmitter for generating electrical signals, at least one conductor arrangement for conducting the electrical signals along a track of movement, and at least one receiver for coupling out electrical signals from a conductor arrangement. At least one conductor arrangement comprises at least one conductor structure for conducting electrical signals, an electric reference surface assigned thereto, and at least one dielectric between the conductor structure and the reference surface. A dielectric of the kind used has a high homogeneity, or a high symmetry with respect to the electrical center of the longitudinal axis of the conductor structure, or both.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: May 1, 2007
    Assignee: Schleifring und Apparatebau GmbH
    Inventors: Harry Schilling, Georg Lohr
  • Patent number: 7183876
    Abstract: A variable coupling factor directional coupler having a variable aperture positioned between a transmission line section and a coupling conductor connected at either end to a center conductor of a pair of connectors. The coupling factor of an RF signal in the transmission line section to the coupling conductor may be adjusted by linear movement of a gap plate to open or close the aperture. Alternatively, the coupling conductor may be located within a slotted tube. As the slotted tube is rotated, the slotted portion of the tube opens or closes the aperture. The position of the inner conductor of the coupling conductor with respect to a grounded sidewall can be adjusted to change the coupled line impedance in order to optimize the coupler directivity.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: February 27, 2007
    Assignee: Electronics Research, Inc.
    Inventors: Dan Fallon, Kerry Phelps
  • Patent number: 7151422
    Abstract: A 90° hybrid for splitting or interconnecting radio frequency power includes four gate connections, capacitances and inductances for electric capacitive coupling and magnetic inductive coupling, an arrangement of strip conductors that are disposed approximately parallel to each other and whose ends form gate connections, and whose dimensions and mutual separations are dimensioned to form the electric capacitive and magnetic inductive couplings of the 90° hybrid, and a ferrite ring surrounding the strip conductors to increase the inductive coupling.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: December 19, 2006
    Assignee: Huettinger Elektronik GmbH + Co. KG
    Inventors: Erich Pivit, Michael Glück, Christian Fritsch
  • Patent number: 7109819
    Abstract: A device for signal transmission between units which are movable relative to each other along predetermined paths comprises at least one transmitter associated with a first unit for generating electrical signals, at least one conductor arrangement associated with the first unit and connected to the transmitter for carrying the electrical signals along a course of the conductor arrangement extending substantially along a path of the movement, and at least one receiver associated with a second unit for decoupling electrical signals from the conductor arrangement. Means for balancing the electrical signals are provided along the course of the conductor arrangement for reducing interference radiation or susceptibility to interference.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: September 19, 2006
    Assignee: Schleifring und Apparatebau GmbH
    Inventors: Harry Schilling, Georg Lohr
  • Patent number: 7098756
    Abstract: The invention relates to an arrangement and method for combining electric signals. The arrangement comprises: an antenna element (270) for receiving first electric signals from the environment; a receiver cable (210) in connection with the antenna element (270) for carrying the first electric signals; at least one antenna feeder cable (212) for carrying second electric signals; a transmitting antenna (250) in connection with said at least one antenna feeder cable (212) for transmitting the second electric signals, and at least one cable coupler (120) in said receiver cable (210), in which the polarity of said at least one cable coupler (120) is reversed in order to induce a local leakage current. Said at least one cable coupler (120) is arranged next to said at least one antenna feeder cable (212) for coupling the first electric signals and the second electric signals to the receiver cable (210).
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: August 29, 2006
    Assignee: Nokia Corporation
    Inventors: Risto Martikkala, Jouni Kauhanen
  • Patent number: 7088198
    Abstract: A controller sends signals to an electromagnetic coupler associated with a bus. The signals are arranged to set a coupling strength of the coupler.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: August 8, 2006
    Assignee: Intel Corporation
    Inventors: Thomas D. Simon, Rajeevan Amirtharajah, John R. Benham
  • Patent number: 7030713
    Abstract: A coupler that has a small package size and is adjustable after manufacturing. A coupler has a substrate with several dielectric layers and a top and bottom surface. A ground plane is located on the top surface and another ground plane is located on the bottom surface. A pair of coupled circuit lines are located within the substrate. Conductive vias extend between the layers and provide an electrical connection between the ground planes and the circuit lines. The top ground plane has several segments joined by links. The top ground plane can be modified to adjust the coupling between the coupled circuit lines by deleting one or more of the links. The links can be used to adjust the coupling after the coupler has been manufactured.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: April 18, 2006
    Assignee: Scientific Components Corporation
    Inventor: Loren Ralph
  • Patent number: 7015771
    Abstract: A directional coupler uses non-metallic slotted spacers at the edges of a pair of coupled lines. The spacers are adjustable in their vertical position and thereby provide continuous coupling fine-adjustment. The spatial relationship between the coupled lines is therefore adjustable and does not depend upon extremely tight manufacturing tolerances.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: March 21, 2006
    Assignee: Alcatel
    Inventor: Dieter Pelz
  • Patent number: 6882244
    Abstract: An apparatus directs two high-power UHF transmitter signals to one or the other or a combination of output destinations as determined by the setting of control components. Redirection between outputs can be performed continuously under full power. Using the apparatus, synchronous amplifiers directed to the same output produce a signal with all of the power of both amplifiers. The signals can be shifted to the station load without shutting down the amplifiers. After a failure, the remaining amplifier can be redirected to provide a clean signal.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: April 19, 2005
    Assignee: SPX Corporation
    Inventor: James Stenberg
  • Patent number: 6825737
    Abstract: An arrangement for broadband signal or energy transmission between at least two units mobile relative to each other along an optional trajectory, comprising a first unit with a symmetric open conductor structure consisting of a plurality of dummy elements that are terminated in a reflection-free manner on both ends, as well as at least one second unit that includes a coupling unit for coupling or decoupling electrical signals. At least one of said second units disposed for movement relative to the first unit is provided with a driver stage for coupling signals into the conductor structure of the first unit.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: November 30, 2004
    Assignee: Schleifring und Apparatebau GmbH
    Inventor: Georg Lohr