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Directional Coupler patents



      
           
This page is updated frequently with new Directional Coupler-related patent applications. Subscribe to the Directional Coupler RSS feed to automatically get the update: related Directional RSS feeds. RSS updates for this page: Directional Coupler RSS RSS


Directional coupler and wireless communication device

Tdk

Directional coupler and wireless communication device

Spatial homogenization of the field strength of radiofrequency pulses

Spatial homogenization of the field strength of radiofrequency pulses

Spatial homogenization of the field strength of radiofrequency pulses

Microchip Technology

Proximity detection using an antenna and directional coupler switch

Date/App# patent app List of recent Directional Coupler-related patents
07/02/15
20150188504
 Amplifier device and corresponding radio base station and mobile communication terminal patent thumbnailnew patent 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.
06/25/15
20150180112
 Directional coupler and wireless communication device patent thumbnailDirectional 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
06/18/15
20150168516
 Spatial homogenization of the field strength of radiofrequency pulses patent thumbnailSpatial 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.. .
06/11/15
20150162944
 Proximity detection using an antenna and directional coupler switch patent thumbnailProximity 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
06/11/15
20150162943
 Proximity detection using an antenna and directional coupler switch patent thumbnailProximity 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
06/11/15
20150160315
 Radiator-excited cavity for nqr detection patent thumbnailRadiator-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
06/04/15
20150156054
 Transmission apparatus patent thumbnailTransmission 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
06/04/15
20150155848
 High-frequency device and directional coupler patent thumbnailHigh-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.
06/04/15
20150153512
 Directional coupler patent thumbnailDirectional 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.
05/21/15
20150137907
 Directional coupler having high isolation patent thumbnailDirectional 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
04/23/15
20150109661

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
04/23/15
20150109176

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.
04/23/15
20150109069

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.
04/16/15
20150102870

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.
04/02/15
20150091668

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
03/26/15
20150084715

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.
03/05/15
20150066408

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.
02/12/15
20150042412

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
02/05/15
20150038999

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.
02/05/15
20150036791

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
01/22/15
20150026847

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
01/15/15
20150015339

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.
01/01/15
20150003782

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.
01/01/15
20150003773

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
01/01/15
20150002239

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.
01/01/15
20150002147

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.
01/01/15
20150002020

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.
12/18/14
20140368293

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.
12/11/14
20140361953

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.
12/04/14
20140355979

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.
12/04/14
20140355935

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..
11/13/14
20140337400

Integrated quantum-random noise generator using quantum vacuum states of light


An integrated quantum random noise source includes a substrate, an optical oscillator that may be integral to the substrate coupled by an optical waveguide to an optical directional coupler. The optical directional coupler has two outputs that are coupled by optical waveguides to a pair of photodetectors that are part of a balanced photodetector.
10/16/14
20140306778

Miniature radio frequency directional coupler for cellular applications


A directional coupler with increased directivity and reduced overall footprint area is disclosed. There is an input port, an output port, a coupled port, and a ballasting port.
10/02/14
20140292440

Directional coupler


Disclosed is a directional coupler including a first hollow portion 1301 that is disposed in a first ground conductor 1201 and is arranged directly above a first signal conductor 1001 and a second signal conductor 1002, and that is constructed of a discontinuous structure that has a function of delaying the phase and that is small with respect to the one-quarter wavelength of an operating frequency.. .
10/02/14
20140292439

Directional coupler


Disclosed is a directional coupler including a broadside coupled line 1031 provided with a main signal line conductor 1001 and a secondary signal line conductor 1011 arranged in parallel with the main signal line conductor 1001, and an offset broadside coupled line 1032 provided with a main signal line conductor 1002 having an end portion connected to an end portion of the main signal line conductor 1001 and a second secondary signal line conductor 1012 having an end portion connected to an end portion of the secondary signal line conductor 1011, and arranged in parallel with the main signal line conductor 1002, in which a coupled line impedance in the broadside coupled line 1031 is lower than a terminal impedance and a coupled line impedance in the offset broadside coupled line 1032 is higher than the terminal impedance.. .
10/02/14
20140292360

Broadband directional coupler


A broadband directional coupler for measuring a power of a forward or returning high-frequency signal on a coaxial line provides a voltage splitter comprising a first resistor, a second resistor and a third resistor. The first connection of the first resistor is connected to an inner conductor of the coaxial line, the second connection of the first resistor and the first connection of the second resistor are connected to a measuring unit.
09/25/14
20140285283

Galvanically isolated, directional coupler


A galvanically isolated, directional coupler, especially for in- and out-coupling of high-frequency measurement signals of a radar fill-level measuring device, wherein two mutually engaging, oppositely bent, conductive traces are provided, wherein the two oppositely bent, conductive traces are so arranged that that they couple with one another over a region of a quarter wavelength (λ/4) of the wavelength associated with the center frequency of the measuring signals and form two groups of laterally coupled, conductive traces, and wherein curved conductive trace portions adjoin each of the two groups of laterally coupled, conductive traces, in each case, over a region, which is less than an eighth wavelength (λ/8) of the wavelength associated with the center frequency.. .
09/18/14
20140266499

Adjustable directional coupler circuit


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.
09/11/14
20140253247

Power amplifying device and transmitter


Certain embodiments provide a power amplifying device including: a distribution line which distributes power; a plurality of power amplifying elements; a connection line; an output line; a filter; a first directional coupler; and a second directional coupler. The power amplifying elements is provided at a stage subsequent to the distribution line.
09/04/14
20140248837

Isolation tuners for directional couplers


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..
08/28/14
20140241657

Optical 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.
08/21/14
20140232407

Magnetic resonance imaging apparatus and measuring radio frequency output for the same


An apparatus for measuring radio frequency output for a magnetic resonance imaging apparatus includes a plurality of directional couplers, a comparator, a switcher and a converter. The plurality of directional couplers are different in degree of coupling from each other, and attenuate an rf signal which is generated in an rf signal generator and amplified in an rf power amplifier.
07/31/14
20140210464

Nqr detection from continuous rabi transitions


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.
07/10/14
20140192394

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.
07/10/14
20140191654

Distributed coupling high efficiency linear accelerator


A microwave circuit for a linear accelerator includes multiple monolithic metallic cell plates stacked upon each other so that the beam axis passes vertically through a central acceleration cavity of each plate. Each plate has a directional coupler with coupling arms.
07/10/14
20140191377

Integrated circuit package


An integrated circuit package comprising a substrate and at least one semiconductor die is described. A connection unit may provide electrical connections between the substrate and the semiconductor die.
06/26/14
20140178005

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).
06/26/14
20140176255

Compact micro strip directional coupler with high directivity for broadband applications


The directional coupler supports ultra high bandwidth of 5600 mhz (from 400 mhz to 6 ghz) in compact structure and also provides high directivity of (>15 db). The coupler uses a two stage micro-strip directional coupler for a frequency range of 400 mhz to 6 ghz, where the first stage supports a frequency of operation from 0.4 to 1 ghz and the second stage supports a frequency of operation from 1 ghz to 6 ghz and the required coupled port can be chosen using a radio frequency switch as required by the application used in..
06/19/14
20140169740

Method and system for stabilized directional couplers


Methods and systems for stabilized directional couplers are disclosed and may include a system comprising first and second directional couplers formed by first and second waveguides, where one of the waveguides may comprise a length extender between the directional couplers. The directional couplers may be formed by reduced spacing between the waveguides on opposite sides of the length extender.
06/05/14
20140152396

Directional coupler


A directional coupler includes a first conductive track, a second conductive track, and a conductive structure. The conductive structure includes a first partial region that is arranged nearer to the first conductive track than the first conductive track is to the second conductive track.
06/05/14
20140152395

Low phase shift voltage variable attenuator


Disclosed is a low phase shift voltage variable attenuator. The low phase shift voltage variable attenuator may include: a first directional coupler including a first input terminal in which a signal is input, a first isolation terminal connected to a ground power source through a termination resistor, a first coupling terminal, and a first through terminal; a second directional coupler including a second input terminal through which an attenuated signal, which is the attenuated input input signal, is output, a second isolation terminal connected to a ground power source through a termination resistor, a second coupling terminal, and a second through terminal; and a signal attenuating unit connected to the first coupling terminal, the first through terminal, the second coupling terminal, and the second through terminal, and configured to attenuate a signal transmitted through the first directional coupler to transmit the attenuated signal to the second directional coupler..
06/05/14
20140152294

Transmitter power monitor


The invention provides an in-line power monitor for an rf transmission line that is capable of being calibrated in-line during live conditions at the exact power level and frequency where it is used. This device uses forward and reflected directional couplers and a non-directional coupler to sample the rf voltage on the transmission line.
05/15/14
20140132355

Providing an integrated directional coupler in a power amplifier


A power amplifier includes a power amplifier core including a plurality of gain stages to receive a radio frequency (rf) signal and to output an amplified rf signal, an output network coupled to the power amplifier core to receive the amplified rf signal and output a transmit output power signal, and a directional coupler coupled to the output network to obtain a coupled signal proportional to the transmit output power signal. Each of these components can be configured on a single semiconductor die, in an embodiment..
05/15/14
20140132344

Broadband doherty amplifier using broadband transformer


A radio frequency amplification unit is provided. The radio frequency amplification unit comprises a main amplifier, wherein the main amplifier is operable to amplify a first portion of an input signal, an auxiliary amplifier, wherein the auxiliary amplifier is operable to turn on and to amplify a second portion of the input signal when the amplitude of the second portion of the input signal fourth signal exceeds a threshold amplitude, and a broadband impedance transformer that is coupled between an output of the main amplifier and an output of the auxiliary amplifier.
05/01/14
20140120814

Effective animal stunning


Disclosed are an animal stunning apparatus and method for inducing rapid unconsciousness and insensibility. The apparatus includes a stunning station wherein a live animal is confined and an applicator contacts an application point on the animal's head overlying a frontal portion of the brain and couples microwave radiation to the head.
05/01/14
20140118082

Forward coupled directional coupler


Described is a directional coupler for forward coupling energy from an input port to a coupling port. The directional coupler has a coupling factor and an operating frequency and an operating wavelength corresponding to the operating frequency..
04/24/14
20140111285

Directional couplers with variable frequency response


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.
04/17/14
20140103901

Electrical power multiplication


A power multiplier and method are provided. The power multiplier includes a power multiplying network that is a multiply-connected, velocity inhibiting circuit constructed from a number of lumped-elements.
02/27/14
20140055196

Power amplifying amplifying power and transmitter for transmitting signal by amplifying power


A power amplifying apparatus includes a filter that filters a predetermined frequency, a branch line provided subsequently to the filter on a substrate on which the filter is provided to distribute power, a power amplifying device provided subsequently to the branch line to amplify power, and a connecting line provided subsequently to the power amplifying device to compose power. The power amplifying apparatus may further include a directional coupler that monitors transmitted high-frequency signals..
02/13/14
20140043108

Balun transformer


A balun transformer includes an unbalanced terminal, two balanced terminals, a directional coupler, a low pass filter, and a high pass filter. The directional coupler includes first, second, third and fourth terminals.
12/26/13
20130342404

Systems and methods for determining antenna impedance


A method for measuring an impedance of an antenna includes generating, by a signal source coupled to the antenna, a radio frequency (rf) signal, applying the rf signal to a directional coupler, and mixing, by a first mixer, a first signal from the directional coupler with a signal, wherein the first signal corresponds to a reflected power from the antenna. The method further includes mixing, by a second mixer, a second signal with the signal, wherein the second signal is offset from the first signal by ninety degrees.
12/19/13
20130336653

Methods and a passive access subnetwork


An access subnetwork node herein comprises one or more add-drop modules, each module including one or more passive optical filters. The one or more add-drop modules are configured to selectively drop a fixed band of wavelength channels from an access subnetwork, via a passive directional coupler, to each of multiple client nodes that actively select to receive client-specific channels within the fixed band.
12/12/13
20130331042

Control of transmit power and adjustment of antenna tuning network of a wireless device


Techniques for controlling transmit power and adjusting an antenna tuning network of a wireless device are disclosed. In an exemplary design, an apparatus (e.g., a wireless device or a circuit module) includes a directional coupler and at least one detector.
12/12/13
20130330041

Wide-band optical coupler


The present invention aims to provide a low-wavelength-dependent optical coupler capable of concurrently achieving high process stability and low polarization dependence. An optical coupler 100 according to an embodiment includes a cladding layer 105 being formed on a substrate 104 and having two waveguides 101a, 101b inside.
12/05/13
20130324057

Determining a delivered power estimate and a load impedance estimate using a directional coupler


A wireless device configured for optimizing a delivered power is described. The wireless device includes a filter duplexer or switch coupled to a transmitter and a receiver.
12/05/13
20130322871

Fiber network events measurement apparatus


A fiber network events measurement apparatus has a laser module alternately generating a pulse signal detecting beam and an fmcw detecting beam. The beams are sent to the fiber network route through a directional coupler.
12/05/13
20130322823

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.
11/21/13
20130307635

Integrated directional coupler within an rf matching network


A directional coupler utilizes an inductive element of a power amplifier and a coupled conductive element. The inductive element of the power amplifier is a functioning element within the power amplifier and at least part of the inductive element of the power amplifier is disposed in a multi-layer substrate.
11/14/13
20130301990

Optical waveguide directional coupler


An optical waveguide directional coupler includes a base and two optical waveguides formed in the base. The base has a ridge portion, and a planar portion adjacent to the ridge portion.
11/14/13
20130300518

Directional coupler


In a directional coupler, a first low pass filter includes a first coil that is connected between a first outer electrode and a main line and has a characteristic in which attenuation increases with increasing frequency in a certain frequency band. A second low pass filter includes a second coil that is connected between a second outer electrode and the main line and has a characteristic in which attenuation increases with increasing frequency in the certain frequency band.
11/14/13
20130300412

Arrangement for multiple frequency, multiple portal 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.


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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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