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 Reconfigurable directional coupler with a variable coupling factor patent thumbnailReconfigurable directional coupler with a variable coupling factor
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.
Rf Micro Devices, Inc.


 Directional coupler and wireless communication device patent thumbnailDirectional coupler and wireless communication device
A directional coupler including a main line, a sub-line, an input terminal, an output terminal, a coupling terminal and an isolation terminal, wherein the main line includes a first main-line section formed on a first layer, and a second main-line section formed on a second layer; the first and the second main-line sections are connected in parallel between the input and the output terminals; the sub-line includes a first sub-line section formed on the first layer, and a second sub-line section formed on the second layer; the first and the second sub-line sections are connected in parallel between the coupling and the isolation terminals; the first main-line section and the first sub-line section are disposed in close proximity to each other to generate electromagnetic coupling; and the second main-line section and the second sub-line section are disposed in close proximity to each other to generate electromagnetic coupling.. .
Tdk Corporation


 Optical modulator with automatic bias correction patent thumbnailOptical modulator with automatic bias correction
An optical modulator uses an optoelectronic phase comparator configured to provide, in the form of an electrical signal, a measure of a phase difference between two optical waves. The phase comparator includes an optical directional coupler having two coupled channels respectively defining two optical inputs for receiving the two optical waves to be compared.
Stmicroelectronics Sa


 Optical reflector based on a  directional coupler and a coupled optical loop patent thumbnailOptical reflector based on a directional coupler and a coupled optical loop
An optical device includes an optical reflector based on a coupled-loopback optical waveguide. In particular, an input port, an output port and an optical loop in arms of the optical reflector are optically coupled to a directional coupler.
Oracle International Corporation


 Board, wireless communications system, and  channel correction inside or outside board patent thumbnailBoard, wireless communications system, and channel correction inside or outside board
A board includes: a baseband unit, multiple transmitters, multiple receivers, a multi-antenna array, a correction transceiver, a correction calculation unit, a bidirectional coupler, and a combiner-splitter. The bidirectional coupler is configured to couple radio frequency signals output by the multiple transmitters and then transmit the coupled radio frequency signals to the combiner-splitter, and to couple receiver correction reference signals obtained by performing division by the combiner-splitter and then send the coupled receiver correction reference signals to the multiple receivers; and the combiner-splitter is configured to combine transmitter radio frequency signals coupled by the bidirectional coupler and then transmit the combined transmitter radio frequency signals to the correction transceiver, and to divide a receiver correction reference signal sent by the correction transceiver and then send receiver correction reference signals obtained by performing division to the coupler.
Huawei Technologies Co., Ltd.


 Tunable laser with directional coupler patent thumbnailTunable laser with directional coupler
A tunable laser has a first mirror, a second mirror, a gain medium, and a directional coupler. The first mirror and the second mirror form an optical resonator.
Skorpios Technologies, Inc.


 Directional coupler and wireless communication device patent thumbnailDirectional coupler and wireless communication device
A directional coupler including a main line having an input terminal and an output terminal, and a sub-line having a coupling terminal and an isolation terminal, the main line, the sub-line, the input terminal, the output terminal, the coupling terminal and the isolation terminal being disposed within a laminate, wherein the main line and the sub-line extend in a loop shape in parallel with and spaced apart from each other by a gap such that electromagnetic coupling is generated therebetween and such that the main line is positioned outside the sub-line on a coupling layer, the input terminal, the output terminal, the coupling terminal and the isolation terminal are disposed outside the main line, and the main line is interposed between the output terminal and the sub-line.. .
Tdk Corporation


 Integrated polarization splitter and rotator patent thumbnailIntegrated polarization splitter and rotator
An integrated polarization splitter and rotator (psr) employs the te0 and te1 modes of propagating light, rather than the te0 and tm0 modes used in conventional prior art psr. The integrated psr exhibits appreciably flatter wavelength response because it does not require a directional coupler to de-multiplex incoming polarizations.
Coriant Advanced Technology, Llc


 Optical pulse compression reflectometer patent thumbnailOptical pulse compression reflectometer
An optical pulse compression reflectometer is provided, which comprises: a single wavelength continuous optical source, an optical splitter, a modulation frequency pulse generating module, an optical directional coupler, an optical fiber under test, an optical coupler, a balanced photoelectric detector, and a pulse compression processing module. The present invention, in addition to overcoming the contradictory constraint between spatial resolution and measurement range in traditional time domain reflectometry and giving to full play the super spatial resolution from frequency modulation technology, has a longer measurement range than that in the optical frequency domain reflectometry..
Shanghai Jiao Tong University


 Catv entry adapter and  distributing catv and in-home entertainment signals patent thumbnailCatv entry adapter and distributing catv and in-home entertainment signals
A cable television (catv) entry adapter connects to a catv network and serves as a hub in an in-home entertainment (ihe) network. Ihe signals may be communicated between passive and active ports of an embodiment of the entry adapter through a pair of directional couplers which allow an ihe-enabled embedded multimedia terminal device (emta) at the passive port to communicate with multimedia devices of the ihe network connected to the active ports.
Ppc Broadband, Inc.


Frequency independent isolation of duplexed ports in distributed antenna systems (dass), and related devices and methods


Frequency independent isolation of duplexed ports in distributed antenna systems (dass) is disclosed. Instead of providing a duplexer in a das that provides frequency dependent separation between downlink and uplink communications signals, an isolation circuit is provided.
Corning Optical Communications Wireless Ltd


Directional coupler


A directional coupler includes an outer cavity and first and second striplines deployed within the outer cavity such that transverse electromagnetic (tem) mode signals are coupled between first portions of the first stripline and the second stripline. The directional coupler also includes first and second electrically and thermally conductive elements connecting the first and second striplines, respectively, to the outer cavity..
Radio Frequency Systems Pty Ltd.


Directional coupler


A directional coupler includes: a main line connecting an input port and an output port; first to third subline sections each of which is formed of a line configured to be electromagnetically coupled to the main line; a first matching section provided between the first subline section and the second subline section; and a second matching section provided between the second subline section and the third subline section. The first and second matching sections are configured to cause changes in phase of high frequency signals passing therethrough, and have mutually different characteristics so as to create two attenuation poles in the frequency response of the coupling of the directional coupler..
Tdk Corporation


Enhanced voltage standing wave ratio measurement


Enhanced rf system measurement including measurement of reflected power of a transmission system using two directional couplers configured to couple reflected power (e.g., isolate forward power). The directional couplers may be placed at a distance of ¼ wave separation and measurements from the two directional couplers may be averaged to obtain a reflected power for the transmission path.
Viasat, Inc.


Radio frequency bitstream generator and combiner providing image rejection


A circuit for combining analog signals includes first and second bitstream generators and a directional coupled connected therewith. The first bitstream generator receives a first analog signal and generates a first digital bitstream as a function thereof.
Lsi Corporation


Method for calibrating a test rig


A method for calibrating a test apparatus, having a first and a second directional coupler, for gauging a two-port test object that has a first port and a second port in a calibration plane, wherein for the purpose of calibrating the test apparatus a vectorial network analyzer having a 1st-6th test port is connected to the first and second ports in the calibration plane such that the first and second test ports are connected to respective port in the calibration plane, the third and fourth test ports are connected to the first directional coupler and the fifth and sixth test ports are connected to the second directional coupler via a respective waveguide for electromagnetic waves. For different calibration standards, scatter parameters are determined for each desired frequency point.
Rosenberger Hochfrequenztechnik Gmbh & Co. Kg


Directional coupler and communication device including same


A directional coupler including a first transmission line including a terminal part provided with a matched termination, and a front end part being an end portion on a side opposite to a side of the terminal part; a second transmission line electromagnetically coupled with the first transmission line; and a third transmission line electromagnetically coupled with the first transmission line, wherein each of the second and third transmission lines includes a near end and a far end, the near end being positioned on a side closer to the front end part when tracing the first transmission line from the front end part, the far end being positioned on a side farther from the front end part when tracing the first transmission line from the front end part, and wherein the near end is terminated to have an impedance smaller than a characteristic impedance of the second transmission line.. .
Keio University


Miniature wideband quadrature hybrid


directional coupler includes a first, second and third transmission lines. Each of the first and second transmission line elements is disposed on a dielectric substrate, and has a first end and a second end.
Harris Corporation


Optical device with integrated reflector(s) comprising a loop reflector integrating a mach-zehnder interferometer


An optical device includes a substrate on which is defined at least one primary waveguide (31, 32) defining a loop reflector, that has first and second directional couplers, and a mach-zehnder interferometer intercalated between the first and second directional couplers and arranged for compensating a wavelength dependence of the first and second directional couplers.. .
Thales


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Frequency selective power monitor


A power line carrier fault detection system includes a forward signal generator configured to transmit a carrier signal to a power line. A directional coupler couples the forward signal generator to the power line.
Ametek Power Instruments


Optical reflector based on a directional coupler and a coupled optical loop


An optical device includes an optical reflector based on a coupled-loopback optical waveguide. In particular, an input port, an output port and an optical loop in arms of the optical reflector are optically coupled to a directional coupler.
Oracle International Corporation


Multiplex transmission system for wirelessly transmitting power, transmitting side multiplex transmission device and billing/information system


A multiplex transmission system including: a primary transmission power source that feeds power of a single frequency; a transmitter-receiver system that includes plural-line transmission antennas wirelessly transmitting power from the primary transmission power source, and plural-line reception antennas receiving power from the transmission antennas that form pairs with the reception antennas; a directional coupler-type transmission power source circuit establishing resonant condition of each of the transmission antennas; and plural-line reception power source circuits establishing resonant condition of each of the reception antennas that form the pairs. The directional coupler-type transmission power source circuit includes a directional coupler-type output filter that distributes power to the respective transmission antennas..

Wireless electronic device with calibrated reflectometer


An electronic device may have control circuitry that uses a reflectometer to measure antenna impedance during operation. The reflectometer may have a directional coupler that is coupled between radio-frequency transceiver circuitry and an antenna.
Apple Inc.


Directional coupler


A directional coupler is configured to provide a forward and/or a backward signal derived from a high-frequency signal. The directional coupler comprises a coupling element coupled to a main line, wherein the main line is configured to transport the high frequency signal.
Rohde & Schwarz Gmbh & Co. Kg


Time-division duplexing (tdd) in distributed communications systems, including distributed antenna systems (dass)


Time-division duplexing (tdd) in distributed communications systems, including distributed antenna systems (dass) is disclosed. In one embodiment, a control circuit is provided and configured to control the tdd transmit mode of a das to control the allocation of time slots for uplink and downlink communications signal distribution in respective uplink path(s) and downlink path(s).
Corning Optical Communications Wireless Ltd.


Voltage controlled optical directional coupler


A voltage controlled optical directional coupler (vcodc) having a coupling ratio that can be adjusted to any desired value through voltage tuning is disclosed. The vcodc may include a first optical hybrid coupler and a second optical hybrid coupler, which may be coupled with each other via one or more voltage controlled optical elements having a variable transparency depending on a voltage applied to the one or more voltage controlled optical elements.
Corning Optical Communications Wireless Ltd


System and a directional coupler


In accordance with an embodiment, a circuit includes a directional coupler having a plurality of ports comprising an input port, a transmitted port, an isolated port and a coupled port, and an adjustable termination coupled to at least one of the plurality of ports.. .
Infineon Technologies Ag


System and a directional coupler module


In accordance with an embodiment, a circuit includes a first directional coupler comprising a first input port, a first transmitted port, a first isolated port and a first coupled port, where the first directional coupler disposed on a first substrate. The circuit also includes a first direction select switch having a first switch input port coupled to the first isolated port, a second switch input port coupled to the first coupled port, and a first switch output port, where the first direction select switch is disposed on the first substrate along with the directional coupler..
Infineon Technologies Ag


Reconfigurable directional coupler


This disclosure relates generally to directional couplers. In one embodiment, a directional coupler includes a first port, a second port, a third port, a first inductive element, a second inductive element, a first switchable path, and a second switchable path.
Rf Micro Devices, Inc.


Adjustable power divider and directional coupler


A power divider including an input port receiving an electrical power input, a coupled port transmitting a portion of the power input, and a transmitted port transferring a remaining portion of the power input from the input port. A first conductor produces an electrical field and electrically connects the input port to the transmitted port.
John Mezzalingua Associates, Llc


Miniaturized multi-section directional coupler using multi-layer mmic process


A miniaturized multi-sectioned, directional coupler using a multi-layer mmic process, the coupler comprising, a monolithic microwave integrated circuit, having a central section with a relatively tight coupling, surrounded by sections of lighter coupling, the relatively tight coupling being comprised of a pair of spiral coupled lines, and the lighter coupling being comprised of meandered edge couple lines with capacitive loading of the lines in several places.. .
Bae Systems Information And Electronic Systems Integration Inc.


Devices and methods related to directional couplers


Devices and methods related to directional couplers. In some implementations, a coupler can include a driver arm and a coupler arm implemented relative to the driver arm to detect power of an rf signal.
Skyworks Solutions, Inc.


Compact and low loss y-junction for submicron silicon waveguide


A compact, low-loss and wavelength insensitive y-junction for submicron silicon waveguides. The design was performed using fdtd and particle swarm optimization (pso).
Coriant Advanced Technology, Llc


Apparatus and methods for reconfigurable directional couplers in an rf transceiver with selectable phase shifters


Provided herein are apparatus and methods for reconfigurable directional couplers in an rf transceiver. Reconfigurable directional couplers can be reconfigured and designed to provide high directivity using configurable capacitors to effect a mutual coupling and using lumped components or delay lines to effect a phase shift.
Skyworks Solutions, Inc.


Wide band directional coupler


A wide band directional coupler comprises a first transmission line, a second transmission line and at least one inductor, wherein the first transmission line and the second transmission line are adjacent each other, and the inductor connects to the second transmission. As a rf signal passes through the first transmission line, the second transmission line will couple with the rf signal in the first transmission line to generate a coupling signal.
Airoha Technology Corp.


Apparatus and methods for reconfigurable directional couplers in an rf transceiver with controllable capacitive coupling


Provided herein are apparatus and methods for reconfigurable directional couplers in an rf transceiver. Reconfigurable directional couplers can be reconfigured and designed to provide high directivity using configurable capacitors to effect a mutual coupling and using lumped components or delay lines to effect a phase shift.
Skyworks Solutions, Inc.


Zero insertion loss directional coupler for wireless transceivers with integrated power amplifiers


A zero insertion loss directional coupler includes an input port, an antenna port, an isolation port, and a detect port. The coupler has a first signal trace, a second signal trace, and an inductive winding.
Rfaxis, Inc.


Directional coupler


A directional coupler includes a main line, a sub line, and a first parasitic element. The main line includes a first main line portion.
Murata Manufacturing Co., Ltd.


Directional coupler


A directional coupler includes a main line, a sub line, and a parasitic element. The main line includes first and second main line portions formed substantially in a spiral shape, as viewed from a first direction.
Murata Manufacturing Co., Ltd.


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Directional coupler and design method thereof, optical waveguide element and wavelength filter


There is provided a directional coupler including a first optical waveguide core and a second optical waveguide core that are arranged in separate and parallel to each other and that propagate one of te polarized waves and tm polarized waves of an m-th order and propagate the other of the te polarized waves and the tm polarized waves of an n-th order. A separation distance between the first optical waveguide core and the second optical waveguide core and a width of the first optical waveguide core and the second optical waveguide core are set such that a mode coupling coefficient of a p-th mode of one of the polarized waves and a mode coupling coefficient of a q-th mode of the other polarized waves match between the first optical waveguide core and the second optical waveguide core..
Oki Electric Industry Co., Ltd.


Optical waveguide directional coupler and making same


An optical waveguide directional coupler includes a base having a planar member and a ridge member and an optical waveguide in the base. The ridge member extends from the planar member and has an upper surface where the optical waveguide exposed.
Hon Hai Precision Industry Co., Ltd.


Methods for designing photonic devices


A compact, low-loss and wavelength insensitive y-junction for submicron silicon waveguides. The design was performed using fdtd and particle swarm optimization (pso).
Coriant Advanced Technology, Llc


Power measurement on magnetic resonance imaging coil at different frequency than larmor frequency


The system of the invention utilizes a magnetic resonance imaging (mri) coil to measure power at a different frequency than the mri frequency to produce mri images. The different frequency such as harmonic frequency of the mr coil is applied to the coil and the reflected power is measured by the power sensor.
General Electric Company


Electronic component


An electronic component includes an input port, a first output port, a ground port, a first capacitor and a second capacitor that are electrically connected in series to one another in a path between the input port and the first output port, a first inductor connected between the ground port and a portion of the path between the input port and the first output port, a second inductor electrically connected in parallel to the second capacitor, and a first sub line, wherein the second inductor and the first sub line define a first directional coupler by generating electromagnetic coupling therebetween.. .
Murata Manufacturing Co., Ltd.


3x3 butler matrix and 5x6 butler matrix


The present invention relates to a 3×3 butler matrix, comprising a first directional coupler, a second directional coupler, a third directional coupler, a first fixed phase shifter, a second fixed phase shifter and a third fixed phase shifter; and also relates to a 5×6 butler matrix, comprising a first 3×3 butler matrix, a second 3×3 butler matrix, a fourth directional coupler, a fifth directional coupler, a power divider, a fourth fixed phase shifter and a fifth fixed phase shifter. The 3×3 butler matrix and the 5×6 butler matrix provided in the present invention have the features of small size, wide frequency band, low loss, high isolation and stable performance, fill the blank of specific technical schemes about the 3×3 butler matrix and the 5×6 butler matrix in the prior art, and have broad application prospects and great value..
Guangdong Braodradio Communication Technology Co., Ltd.


Foreign object detection device, foreign object detection method, and non-contact charging system


Disclosed herein is a foreign object detector to detect a foreign object while distinguishing metal from water. The foreign object detector includes a detection coil; a transmitting circuit generating rf power of a predetermined frequency; a directional coupler outputting the rf power supplied from the transmitting circuit to the detection coil, and extracting reflected power that is a power component reflected by the detection coil; and a detection circuit receiving the reflected power extracted by the directional coupler, and detecting the foreign object by sensing a change in the frequency characteristic of the reflected power..
Panasonic Intellectual Property Management Co., Ltd.


Adaptive load for coupler in broadband multimode multi-band front end module


Directional couplers for front end modules (fems) are disclosed that include a first port configured to receive a radio-frequency (rf) signal, a second port connected to the first port via a first transmission line and configured to provide an rf output signal, and a third port connected to a second transmission line, the second transmission line coupled to the first transmission line. A directional coupler in accordance with the present disclosure may further include a termination circuit connected to the second transmission line and configured to provide a first impedance when the rf signal is within a first frequency band and provide a second impedance when the rf signal is within a second frequency band..
Skyworks Solutions, Inc.


Directional couplers having variable power ratios and related devices, systems, and methods


Variable power ratio (vpr) directional couplers that permit an amount of power directed to different outputs to be varied and managed. In some embodiments, the power ratio of the vpr coupler is represented by an equivalent coupling factor c′ corresponding to a conventional coupling factor c.
Corning Optical Communications Wireless Ltd


Optical phased arrays


An optical phased array formed of a large number of nanophotonic antenna elements can be used to project complex images into the far field. These nanophotonic phased arrays, including the nanophotonic antenna elements and waveguides, can be formed on a single chip of silicon using complementary metal-oxide-semiconductor (cmos) processes.

Radio frequency circuit and mobile terminal


A radio frequency circuit. In the circuit, a first directional coupler receives a second transmit signal, uses a part of the second transmit signal as a third transmit signal, directly sends the third transmit signal to a first port of a circulator, and obtains a first coupling signal from the second transmit signal; the circulator outputs the third transmit signal through a second port; an impedance tuner transmits the third transmit signal to an antenna port and transmits, to the second port of the circulator, a first input signal from the antenna port; the circulator inputs the first input signal to a second directional coupler through a third port; the second directional coupler obtains a second coupling signal from the first input signal; and a controller adjusts impedance of the impedance tuner according to the first coupling signal and the second coupling signal..
Huawei Technologies Co., Ltd.


Directional coupler


A directional coupler includes a multilayer structure formed by stacking a plurality of dielectric layers including first and second dielectric layers; a main line including first and second main line portions that are electrically connected in series to each other; and a sub line electromagnetically coupled with the main line, the sub line including first and second sub line portions that are electrically connected in series to each other. The first main line portion and the first sub line portion are provided on the first dielectric layer.
Murata Manufacturing Co., Ltd.


Effective animal stunning


An animal stunning apparatus for inducing unconsciousness and insensibility of a live subject animal includes an applicator for contacting an application point on the live subject animal's head and couples microwave radiation to the head. A microwave generator generates microwave energy of a suitable power level and frequency, and a waveguide directs the microwave radiation to the applicator.
Wagstaff Food Services Pty Ltd


Directional coupler system


A circuit can include a tandem directional coupler comprising a first directional coupler and a second directional coupler connected in tandem. Each of the first and second directional couplers can have a first strip and a second strip.

Power feeding device, power receiving device, and wireless power feed system


A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an ac power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil..
Semiconductor Energy Laboratory Co., Ltd.


Directional coupler


A directional coupler includes a main line and a subline. The main line connects an input port and an output port.
Tdk Corporation


Tunable laser with directional coupler


A tunable laser has a first mirror, a second mirror, a gain medium, and a directional coupler. The first mirror and the second mirror form an optical resonator.
Skorpios Technologies, Inc.


Directional semiconductor waveguide coupler


An optical, directional coupler has a first input, a second input, a first output, and a second output. The coupler is made with a shoulder disposed on a substrate and a first ridge and a second ridge disposed on the shoulder.
Skorpios Technologies, Inc.


Directional coupler and microwave heater provided with the same


A directional coupler according to the invention includes an opening in a wall surface of a waveguide, and a coupling line on an outer side of the waveguide. The opening is configured to not cross a tube axis of the waveguide in plan view, and to emit a circularly polarized wave.
Panasonic Intellectual Property Management Co., Ltd.


Directional coupler


The embodiments relate to a directional coupler including, in each case, one connection for a first, a second, a third, and a fourth port. The coupler includes a first coupling network for providing the connection for the first port and a second coupling network for providing the connection for the second port.

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Optical waveguide device


An optical waveguide device includes: a mode splitter including a main waveguide in which lights can be propagated in at least two propagation modes with different propagation orders and a subsidiary waveguide which includes a coupling section disposed in parallel with the main waveguide at a certain distance away from the main waveguide so as to constitute a directional coupler and is capable of splitting at least one propagation mode out of the two or more propagation modes from the main waveguide. Also, ncore/ncladding which is a refractive index ratio between a core and a cladding which constitute the main waveguide and the subsidiary waveguide is in a range of 101% to 250%..
Fujikura Ltd.


Directional coupler, and multiplexer and demultiplexer


The directional coupler includes: lattice points periodically arranged in the 2d-pc slab and configured to diffract optical waves, thz waves, or millimeter waves in pbg frequencies in pbg structure of the 2d-pc slab in order to prohibit existence in a plane of the 2d-pc slab; a first 2d-pc waveguide formed of a line defect; a second 2d-pc waveguide which can be mode-coupled to the first waveguide; a directional coupling unit disposed between the first waveguide and the second waveguide in two rows, and having lattice points between waveguides of which the radius is smaller than that of the lattice points, wherein in order to match the first waveguide with an operational band at a side of an input port from the directional coupling unit, the width of the second waveguide is narrowed so that the whole dispersion curve of the directional coupling unit is moved to a higher-frequency side.. .
Osaka University


Electromagnetic directional coupler wired pipe transmission device


A wired pipe assembly includes a first wired pipe segment including a first body extending from a first box end to a first pin end and a second wired pipe segment including a second body extending from a second box end to a second pin end. The assembly also includes an electromagnetic directional coupler including an input line disposed in the first wired pipe segment and an output line disposed in the second wired pipe segment..
Baker Hughes Incorporated


Directional coupler


A directional coupler includes: a main line connecting an input port and an output port; a first subline section and a second subline section each of which is formed of a line configured to be electromagnetically coupled to the main line; and a matching circuit provided between the first subline section and the second subline section. The matching circuit includes a first path connecting the first subline section and the second subline section, and a second path connecting the first path and the ground.
Tdk Corporation


Antenna array system for producing dual circular polarization signals utilizing a meandering waveguide


An antenna array system for directing and steering an antenna beam is described in accordance with the present invention. The antenna array system may include a feed waveguide having a feed waveguide length, at least two directional couplers in signal communication with the feed waveguide, at least two pairs of planar coupling slots along the feed waveguide length, and at least two horn antennas..
The Boeing Company


Reflection cancellation in multibeam antennas


A feed network for a multi-beam antenna is provided, including a first beam port, a second beam port, a beam-forming network coupled to the beam ports, and a cancellation circuit. The cancellation circuit is coupled to the first beam port and the second beam port before the beam-forming network.
Andrew Llc


Apparatus and stabilizing pulse laser output


A pulse laser output stabilizing apparatus including a directional coupler to receive output of pulse laser, the output branching into a first optical path and a second optical path, a photodetector to receive light branching into the first optical path and output current according to intensity of the light, a current-voltage converter to convert output current of the photodetector into a voltage and output converted voltage, a function generator to provide an output proportional to output signal of the current-voltage converter with a predetermined frequency, a time delay unit on the second optical path providing a predetermined time delay for feedback control, and an acousto-optic tunable modulator to receive output signal of the functional generator and optical signal from the time delay unit as an input and modulate and output the optical signal from the time delay unit according to amplitude of the output signal of the function generator.. .
Korea Research Institute Of Standards And Science


Resonance coupler, transmission apparatus, switching system, and directional coupler


A resonance coupler disclosed includes a first resonator to which a transmission signal is input, a second resonator to which the transmission signal is isolatedly transmitted from the first resonator, the second resonator spaced from and opposed to a first side of the first resonator, and electromagnetically coupled with the first resonator, and a third resonator to which the transmission signal is isolatedly transmitted from the first resonator, the third resonator spaced from and opposed to a second side, opposite to the first side, of the first resonator, and electromagnetically coupled with the first resonator.. .
Panasonic Intellectual Property Management Co., Ltd.


Multi-tap having moca cutoff function


The present invention relates to a multi-tap having moca cutoff function, which includes: a low-pass filtering unit used for inputting a rf signal; a directional coupler used for outputting the rf signal; a first-stage splitter, an input end thereof is coupled to a second output end of the directional coupler for attenuating the rf signal to a first value so as to be outputted; and at least a second-stage splitter, an input end thereof is coupled to an output end of the first-stage splitter for attenuating the rf signal to a second value so as to be outputted to at least a user end.. .
Lantek Electronics Inc.


System and a directional coupler


In accordance with an embodiment, a circuit includes a current sensing circuit comprising a current input terminal coupled to an input port, a current output terminal coupled to a transmitted port, and a current sensing output terminal configured to provide a current sensing signal proportional to a current flowing between the current input terminal and the current output terminal. The circuit further includes a voltage sensing circuit having a voltage input terminal coupled to the transmitted port and a voltage sensing output terminal configured to provide a voltage sensing signal proportional to a voltage at the transmitted port.
Infineon Technologies Ag


Amplifier device and corresponding radio base station and mobile communication terminal


It is presented an amplifier device comprising: a primary amplifier arranged to receive at least part of an input signal; a secondary amplifier arranged to receive at least part of the input signal; a first directional coupler device, wherein one input of the first directional coupler device is connected to the primary amplifier and a second input of the first directional coupler device is connected to the secondary amplifier; and a first multiband termination device arranged to reflect signals with a predetermined reflection phase in at least two frequency bands. One output of the first directional coupler device is a main output of the amplifier device and a second output of the first directional coupler device is connected to the first multiband termination device.
Telefonaktiebolaget L M Ericsson (publ)


Directional coupler and wireless communication device


A directional coupler according to the present invention includes a primary line for transmitting a transmission signal; an input port for inputting the transmission signal to the primary line; an output port for outputting the transmission signal from the primary line; a secondary line for electromagnetically coupling with the primary line to extract part of the transmission signal; a coupling port provided at one end of the secondary line; an isolation port provided at the other end of the secondary line; and a low pass filter unit having a function of low pass filter, disposed between the secondary line and the coupling port.. .
Tdk Corporation


Spatial homogenization of the field strength of radiofrequency pulses


The embodiments relate to a method and a device for spatial homogenization of the field strength of voltages of radiofrequency pulses of a number of rf transmitters, wherein (a) the measured complex voltages, induced by the electromagnetic field of the antenna, of a plurality of field probes, which are disposed in the vicinity of the antenna, are respectively superposed with a fitting phase shift and used for establishing the new desired homogenized voltages of the radiofrequency pulses of the antenna by a complex transfer function, and/or (b) output signals of at least two directional couplers on the rf feed lines of the antenna are superposed in a respectively fitting phase-shifted manner and these are used to establish complex impedances or scattering parameters of a complex scattering matrix of the antenna, which are used for establishing the new desired homogenized voltages of the radiofrequency pulses of the antenna.. .

Proximity detection using an antenna and directional coupler switch


Detection of an increase in a mismatch of an antenna of a radio frequency (rf) device and/or a change in a capacitance value of the antenna indicates proximity of a body to the antenna. Upon detection of proximity of a body to the antenna, reduction of transmit power of the rf device may be done to meet specific absorption rate (sar) level regulations..
Microchip Technology Incorporated


Proximity detection using an antenna and directional coupler switch


Detection of an increase in a mismatch of an antenna of a radio frequency (rf) device and/or a change in a capacitance value of the antenna indicates proximity of a body to the antenna. Upon detection of proximity of a body to the antenna, reduction of transmit power of the rf device may be done to meet specific absorption rate (sar) level regulations..
Microchip Technology Incorporated


Radiator-excited cavity for nqr detection


Nuclear quadrupole resonance measurement using two or more wire loop(s) within a space to define a portal, and driving the wire loop(s) with a baseband digital transmitter generating a chirped or stepped signal, to create a corresponding varying electromagnetic field within the portal. Coherent emissions reflected thereby are detected through a directional coupler feeding the transceiver.
Ami Research & Development, Llc


Transmission apparatus


A square detection circuit square-detects a portion of a high frequency transmission signal that is extracted by a directional coupler, of a high frequency transmission signal amplified by a power amplifier. A first adjustment circuit extracts a dc component from a detection output of the square detection circuit, and adjusts respective amplitudes of baseband i and q signals generated by an i/q signal generation circuit, in response to the extracted dc component.
Panasonic Corporation


High-frequency device and directional coupler


A high-frequency device includes a substrate including a plurality of layers that are stacked on top of one another and that include dielectric and magnetic layers, terminals, pattern conductors each formed on one layer, and via conductors each extending through one layer. The pattern conductors and via conductors connect the terminals and form a signal line that transmits a high-frequency signal.
Murata Manufacturing Co., Ltd.


Directional coupler


A directional coupler comprising a first and a second optical waveguide extending at least partially parallel to one another is provided. The first and the second optical waveguide are arranged on a substrate in such a way that they extend in common plane running essentially parallel to the substrate.
Fraunhofer-gesellschaft Zur Förderung Der Angewandten Forschung E.v.


Directional coupler having high isolation


Provided is a directional coupler having high isolation, the directional coupler including a first directional coupler including a first main line and a first sub-line, and a second directional coupler including a second main line and a second sub-line, wherein the first directional coupler is connected to the second directional coupler in series.. .
Electronics And Telecommunications Research Institute


Reflector based on a directionally coupled optical loop


An optical device includes an optical reflector based on a coupled-loopback optical waveguide. In particular, an input port, an output port and an optical loop in arms of the optical reflector are optically coupled to a directional coupler.
Oracle International Corporation


Antenna circuit and a optimisation thereof


An antenna circuit is having an impedance circuit which can cancel signal leakage from the input port into the isolation port of a directional coupler. The antenna circuit further comprises a second impedance circuit for optimising power transfer from the input port to the output port of the directional coupler.
Hong Kong Applied Science And Technology Research Institute Co. Ltd.


Directional coupler


A directional coupler includes a multilayer body including a plurality of stacked dielectric layers, a main line including a first main line portion and a second main line portion which are connected in series to each other in this order and that is provided in the multilayer body, and a sub-line including a first sub-line portion and a second sub-line portion which are connected in series to each other in this order, the first sub-line portion being electromagnetically coupled to the first main line portion, the second sub-line portion being electromagnetically coupled to the second main line portion, and the sub-line being provided on one side in a stacking direction with respect to the main line in the multilayer body. The second main line portion is provided on a dielectric layer that is different from a dielectric layer on which the first main line portion is provided and/or the second sub-line portion is provided on a dielectric layer that is different from a dielectric layer on which the first sub-line portion is provided..
Murata Manufacturing Co., Ltd.


Directional coupler arrangement and method


A directional coupler arrangement comprising an air waveguide and a coupler port having a coupler line arranged inside the air waveguide. A method for producing a directional coupler arrangement comprising forming an air waveguide and forming a coupler port having a coupler line arranged inside the air waveguide is also disclosed..
Huawei Technologies Co., Ltd.


System and a radio frequency coupler


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..
Infineon Technologies Ag


Output match directional coupler


A directional coupler that provides directional coupling and an impedance transformation is disclosed. In one embodiment, the directional coupler includes a low pass filter having a filter inductor that is coupled between an input port and an output port and a filter capacitor coupled between the output port and ground.
Rf Micro Devices, Inc.


Time frame measuring method with calibration in the frequency range


A method for determining electric voltage u(t) and/or electric current i(t) of an rf signal in the time domain in a calibration plane, wherein by at least one directional coupler having two outputs and one signal input a first component of a first rf signal that runs from the signal input in the direction of the calibration plane, and a second component of a second rf signal that runs from the calibration plane in the direction of the signal input is decoupled. For a two-port error of the directional coupler, the error terms e00, e01, e10 and e11, are determined as a function of a frequency f and the signal values v1(t) and v2(t) are transformed into the frequency domain as wave quantities v1(f) and v2(f), and absolute wave quantities a1 and b1 in the frequency domain in the calibration plane are calculated from the wave quantities v1(f) and v2(f) by the error terms e00, e01, e10 and e11..
Rosenberger Hochfrequenztechnik Gmbh &co Kg.


Directional coupler circuit techniques


Techniques for efficiently integrating directional coupler circuitry with other circuit elements of an rf front end. In an aspect, one or more inductors of an rf front end filter is incorporated into a first inductor of the directional coupler, and a capacitor is further coupled in parallel with the first inductor.
Qualcomm Incorporated


Method and coupling left ventricle of the heart to the anterior interventricular vein to stimulate collateral development in ischemic regions


A method for stimulation of collateral development in ischemic cardiac regions comprises the fluid coupling of the left ventricle of the heart to the anterior interventricular vein to stimulate collateral development in ischemic regions. The fluid coupling of the left ventricle of the heart to the anterior interventricular vein includes a control of the diastolic/systolic pressure in the venous system to be within about 20-50 mmhg.
Ension, Inc.


Rotating unit with a device for wireless data transmission between two parts movable relative to one another, and wireless data transmission between two parts movable relative to one another


In a method and a device for wireless data transmission between two parts of a medical imaging device that are moving relative to one another, at least: a first communication device has at least one transmission unit to transmit at least one radio-frequency signal, a second communication device has at least one reception unit to receive at last one radio-frequency signal, and the first and second communication devices are arranged at the different parts of the rotating unit. A directional coupler has at least two radio-frequency conductors; with one of the radio-frequency conductors being connected at one end thereof with the first communication device, and the other end thereof is terminated with a real resistor.
Siemens Aktiengesellschaft


Radio-frequency reflectometry scanning tunneling microscope


An rf reflectometry scanning tunneling microscope is suitable for observing a surface of an object, and includes a probe that cooperates with the object to form a tunneling resistor therebetween, an rf resonant circuit that cooperates with the tunneling resistor to form a lcr resonant circuit including an inductor connected to a parallel connection of a capacitor, a resistor and the tunneling resistor, a directional coupler receiving an rf signal and outputting the rf signal to the lcr resonant circuit, and an rf signal measuring device that generates a scanning result associated with the surface of the object based on a reflected rf signal resulting from reflection of the rf signal by the lcr resonant circuit.. .
National Taiwan University


Power amplifier architectures with input power protection circuits


An rf power amplifier circuit and input power limiter circuits are disclosed. A power detector generates a voltage output proportional to a power level of an input signal.
Rfaxis, Inc.


Polarization conversion device


A polarization conversion device includes: a directional coupler that includes an input side optical waveguide and an output side optical waveguide which are disposed in parallel to each other and each of which has a core assuming that a direction in which the input side optical waveguide and the output side optical waveguide face each other is a width direction and a direction perpendicular to the width direction is a height direction in a cross section perpendicular to a longitudinal direction of each of the input side optical waveguide and the output side optical waveguide, and the directional coupler is configured to couple first light guided through the input side optical waveguide to second light guided through the output side optical waveguide, the polarization direction of the second light is perpendicular to that of the first light.. .
Fujikura Ltd.


Beam combiner


A beam combiner is disclosed that comprises a planar lightwave circuit that is based on undoped silicon nitride-based surface waveguides, wherein the planar lightwave circuit comprises a plurality of input ports, a mixing region, and an output port, and wherein the mixing region comprises a plurality of directional couplers that are arranged in a tree structure. Embodiments of the present invention are capable of combining a plurality of light signals characterized by disparate wavelengths on irregular spacings with low loss.
Octrolix Bv


Directional coupler


A directional coupler for use in a predetermined frequency band includes a laminate body including a laminate of a plurality of insulation layers, a first terminal through a fourth terminal disposed on a surface of the laminate body, a main line connected between the first terminal and the second terminal and disposed on the insulation layer, a first sub-line connected to the third terminal, electromagnetically coupled with the main line, and disposed on the insulation layer, a second sub-line connected to the fourth terminal, electromagnetically coupled with the main line, and disposed on the second sub-line, and a phase adjusting circuit connected between the first sub-line and the second sub-line and configured to cause a phase shift on a passing signal. The main line, the first sub-line and the second sub-line do not overlap each other in a plan view from a direction of lamination..
Murata Manufacturing Co., Ltd.


Safety tests for systems monitoring local sar


In order to provide online monitoring of local specific absorption rate (sar) within a body subject to a magnetic resonance imaging (mri) scan, directional couplers measure a phase and an amplitude of a transmission radio frequency (rf) pulse generated and transmitted by an mri system. A measured local sar value is calculated based on the measured phase and the measured amplitude of the transmission rf pulse using a voxel model of the body and an electromagnetic (em) simulation.

Rf/vhf impedance matching, 4 quadrant, dual directional coupler with vrms/irms responding detector circuitry


A physical vapor deposition system may include an rf generator configured to transmit an ac process signal to a physical vapor deposition chamber via an rf matching network. A detector circuit may be configured to sense the ac process signal and output a dc magnitude error signal and a dc phase error signal.
Comet Technologies Usa, Inc.


Directional coupler


To achieve favorable directivity in a directional coupler, even with a low magnetic-field coupling coefficient, the directional coupler includes a main line, a secondary line, and impedance conversion sections. The main line is connected between a signal input port and a signal output port.
Murata Manufacturing Co., Ltd.


Directional coupler


Microstrip directional couplers and methods of their design are disclosed. According to one aspect, a microstrip directional coupler has a substrate of a first thickness.

System and an optical coupler


In one embodiment, an optical directional coupler includes an input terminal configured to receive an input optical signal and a first coupler optically coupled to the input terminal, where the first coupler has a first coupling length, and where the first coupler is configured to couple a first portion of the input optical signal to a first optical leg and a second optical portion of the input optical signal to a second optical leg. The optical directional coupler also includes the first optical leg, where the first optical leg is configured to phase shift the first portion of the optical signal to produce a first phase shift signal and the second optical leg, where the second optical leg is configured to phase shift the second portion of the optical signal to produce a second phase shift signal, and where the first phase shift signal has a phase difference relative to the second phase shift signal.

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Directional coupling-type multi-drop bus


The invention relates to a directional coupling-type multi-drop bus of which the impedance is matched with the bus at the time of coupling so that the speed is increased. A directional coupler is formed when a second module provided with a second coupler end is mounted on a first module provided with a first coupler end, and as a result, the coupling impedance where the proximity effects in the coupling state of the directional coupler are reflected is matched with the impedance of the bus..



Directional Coupler topics:
  • Directional Coupler
  • Logarithmic
  • Interrupted
  • Distributed
  • Magnetic Field
  • Subscriber
  • Terminal Device
  • Home Entertainment
  • Multimedia
  • Multimedia Device
  • Second Wave
  • High Speed
  • Transmitter
  • Downstream
  • Feedback Signal


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