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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


Date/App# patent app List of recent Directional Coupler-related patents
11/13/14
20140337400
 Integrated quantum-random noise generator using quantum vacuum states of light patent thumbnailIntegrated 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 patent thumbnailMiniature 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 patent thumbnailDirectional 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 patent thumbnailDirectional 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 patent thumbnailBroadband 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 patent thumbnailGalvanically 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 patent thumbnailAdjustable 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 patent thumbnailPower 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 patent thumbnailIsolation 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 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.
08/21/14
20140232407
Magnetic resonance imaging apparatus and apparatus for 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 apparatus for 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 apparatus for 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 method for 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.
11/07/13
20130293317
Directional coupler
The invention relates to a directional coupler (1), comprising a first high-frequency line (2) for feeding a first high-frequency signal, a second high-frequency line (3) for feeding a second high-frequency signal, and a coupling line (4) for outputting signals from the first and the second high-frequency lines (2, 3), wherein the coupling line (4) comprises resistive segments (5a-5c, 15a-15c, 25a-25c, 35a-35c, 45a), each comprising a predetermined impedance. Coupling properties and resistive damping and adapting properties can be integrated in the coupling line (4).
11/07/13
20130293316
Methods for directional coupler termination impedance control
Methods for directional coupler termination impedance control are provided. In one embodiment, a method for termination impedance selection of a directional coupler in a power amplifier module is provided.
10/31/13
20130287340
Optical waveguide directional coupler and method for making same
An optical waveguide directional coupler includes a base and a y-shaped optical waveguide formed in the base. The base includes a planar member and a ridge member extending from a side of the planar member.
10/03/13
20130257559
Integrated bidirectional coupler
A distributed-line directional coupler including: a first conductive line between first and second ports intended to convey a signal to be transmitted; and a second conductive line, coupled to the first one, between third and fourth ports, the second line being interrupted approximately at its middle, the two intermediary ends being connected to attenuators.. .
09/19/13
20130241668
Directional coupler
In a directional coupler, even when parasitic inductance exists, an increase in device size can be suppressed while obtaining good isolation characteristics. A transmission line type directional coupler includes a main line and a sub line that is coupled to the main line through electric field coupling and magnetic field coupling.
09/19/13
20130241667
Directional coupler
A directional coupler includes in a laminate block, a first main line, a first sub-line, a second sub-line, and a second main line sequentially provided in a lamination direction of layers. Further, each of the first main line, the first sub-line, the second sub-line, and the second main line is divided into at least two divided coil conductors.
08/29/13
20130227632
Catv entry adapter and method for 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.
08/15/13
20130210477
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..
08/15/13
20130209111
Demodulating delay circuit and optical receiver
A demodulating delay circuit with a planar lightwave circuit includes: an optical interferometer including input and output couplers, and a first arm waveguide connecting the couplers, and a shorter second arm waveguide. The interferometer delays each bit of a signal by one bit such that the delayed bit interferes with its adjacent bit, and has a bent form such that propagation directions of light in the couplers are different by 180 degrees.
08/15/13
20130207741
Programmable directional coupler
A programmable directional coupler to detect incident power and possibly reflected power is disclosed. The programmable directional coupler includes first and second inductors and at least one adjustable capacitor.
08/15/13
20130207710
Enhanced flexibility coupler for rf power detection and control
This invention describes a method by which the output power of a circuit or system at any point can be efficiently and cost effectively sampled in a simple and broadband fashion for processing in a closed loop system for applications such as power level control in very broadband circuits. A divider circuit consisting of a selection of passive lumped elements is used to create a very broadband means of sampling the rf power level at any point in a transmission line.
08/01/13
20130194055
Directional coupler
A directional coupler has a first line capable of transmitting a high-frequency signal therethrough and a second line arranged for electromagnetic coupling with the first line in a laminated board. The first line and the second line are routed on a first conductor layer to extend in close proximity to and in parallel with each other, to form an intra-layer coupling zone for developing electromagnetic coupling between the first line and the second line.
08/01/13
20130194054
Combined directional coupler and impedance matching circuit
An output circuit with an integrated directional coupler and impedance matching circuit is disclosed. In an exemplary design, an apparatus includes a switchplexer and an output circuit.
07/18/13
20130185009
High speed high dynamic range high accuracy measurement system
A measuring system includes an input that emulates a bandpass filter with no signal reflections. A directional coupler connected to the input passes the filtered input to electrically isolated measuring circuits.
06/27/13
20130165056
Wireless communications device with an adjustable impedance matching network and associated methods
A mobile wireless communications device includes a portable housing, a transmitter carried by the portable housing and configured to modulate an input signal, and an adjustable impedance matching network coupled downstream from the transmitter. An antenna is coupled downstream from the adjustable impedance matching network, and a non-directional coupler is coupled between the adjustable impedance matching network and the antenna.
06/13/13
20130147576
High directivity directional coupler
Systems and methods for achieving high directivity (>20 db) coupling over a reasonable frequency bandwidth on a microstrip transmission line. An exemplary coupler cancels out-of-phase, coupled reflected power signals on the transmission line thereby increasing the directivity..
06/13/13
20130147535
Tunable active directional couplers
Active directional couplers are provided. In accordance with certain embodiments of the invention, the subject active directional couplers are tunable.
06/06/13
20130141184
Directional coupler
In a directional coupler, sub-lines or main lines are electromagnetically coupled to each other to degrade isolation characteristics. A capacitor is located between the sub-lines or between the main lines to cause the isolation characteristics to have poles in order to improve the isolation characteristics of the directional coupler..
06/06/13
20130141183
Directional coupler integrated by cmos process
A directional coupler is disclosed integrated on a single chip and an integrated circuit based on a standard cmos process and relates to a field of radio frequency communication. In exemplary implementations, by using a standard cmos process technology, the directional coupler integrated by a cmos process is formed by a coil winded by a upper layer of metal lines, a coil winded by a lower layer of metal lines, two tuning capacitor array, and a matching resistor.
05/16/13
20130120076
Directional coupler
In a directional coupler, a laminated body includes a plurality of insulator layers that are laminated to one another. A main line and a sub-line are embedded in the laminated body, include spiral-shaped portions including central axes parallel or substantially parallel to a z-axis direction, and are electromagnetically coupled to each other.
05/09/13
20130116932
Using phase matched filters for nqr detection of 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.
05/09/13
20130113560
Power amplifying circuit and high-frequency module
A high-frequency module including a power amplifying circuit includes a high-frequency power amplifying element, a matching circuit, and a driving power-supply circuit. The high-frequency power amplifying element includes a high-frequency amplifying circuit and a directional coupler.
05/09/13
20130112466
Electronic component and method for manufacturing the same
An electronic component in which a direction identification mark can be easily formed includes a laminate including a plurality of laminated insulating material layers and a mounting surface parallel or substantially parallel to a z-axis direction. A directional coupler including a main line and a sub-line is included in the laminate.
05/02/13
20130106648
Short-range homodyne radar system
A homodyne radar system includes an oscillator, an antenna, a low noise amplifier, a mixing subsystem and a directional coupler. The oscillator is configured to generate a transmit signal and a local oscillator signal.
05/02/13
20130106529
Electronic component
In an electronic component, a main line includes a spiral-shaped portion having a central axis that is parallel or substantially parallel to a z-axis direction. A sub line is electromagnetically coupled with the main line to define a directional coupler, and includes a spiral-shaped portion having a central axis that is parallel or substantially parallel to the z-axis direction.
04/11/13
20130088954
Wireless communication device
A disclosed wireless communication device performing transmission and reception in a time-division manner includes an antenna, a transmission unit, a reception unit, a transmission/reception switchover unit, a first path switchover unit, a directional coupler, a second path switchover unit, a first fault diagnosis unit, and a second fault diagnosis unit. The second fault diagnosis unit causes the second path switchover unit to form a reflection signal input path; causes a second transmission signal level-adjusted for fault diagnosis to be outputted from the transmission unit; acquires a signal level of a reflection signal from the antenna inputted from the directional coupler into the reception unit; and determines whether or not a transmission radio wave is normally emitted from the antenna based on the signal level of the reflection signal..
04/04/13
20130082687
Transmitter calibration system
Systems and methods are provided for calibrating a transmitter system. A directional coupler is configured to provide a first signal representative of a forward power of an rf signal and a second signal representative of a reflected power of the rf signal.
03/28/13
20130076370
Diagnostic circuit for monitoring an analog-digital converter circuit
Described is monitoring of an analog-digital conversion of a measured value of at least one of a pressure gauge, a level gauge and a flowmeter. Different measured values can be provided for the analog-digital converter by means of a first microcontroller, wherein these measured values are subsequently transmitted from this first area into a second area by means of a unidirectional coupler.
03/14/13
20130063222
Radio-frequency transmitter, such as for broadcasting and cellular base stations
An rf circuit having a transcoupler, a multifunctional rf-circuit element that can operate both as an impedance inverter and as a signal coupler. When connected to a fixed load impedance, the transcoupler can also operate as an impedance transformer.
03/07/13
20130056730
Semiconductor device
A technique capable of promoting miniaturization of an rf power module used in a mobile phone etc. Is provided.
03/07/13
20130056154
Abnormality detecting unit and abnormality detecting method
An abnormality detecting unit includes a monitoring unit for monitoring an operation from a wafer deviation starting point to a transfer gate valve opening point after performing a plasma process on the wafer and specifying the operation as a wafer deviation operation; an acquisition unit for acquiring a high frequency signal of at least one of a progressive wave and a reflection wave outputted from a directional coupler between a high frequency power supply for applying a high frequency power into a processing chamber and a matching unit or between a lower electrode as a mounting table for mounting thereon the wafer and the matching unit during the wafer deviation operation; an analysis unit for analyzing a waveform pattern of the high frequency signal; and an abnormality determination unit for determining whether there is an abnormal electric discharge based on an analysis result of the waveform pattern.. .


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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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