Class / Patent application number | Description | Number of patent applications / Date published |
333170300 | Impedance matching | 70 |
20080211598 | ON-CHIP IMPEDANCE MATCHING USING A VARIABLE CAPACITOR - A system and a method for on-chip impedance matching, of at least two ports: an output source and an input load. The system includes an on-chip integrated impedance matching circuit (IMC) that comprises: at least one variable capacitor; a control unit that enables tuning of the variable capacitor, receiving and transmitting of signals and processing of signals; and at least one peak detector that enables detection of signal peaks (SP). Control unit enables determining of a substantially optimal signal peak and tuning of the variable capacitor to a substantially optimal capacitance that is corresponding to the said optimal signal peak. The highest signal peak provides the substantially optimal impedance matching between the ports. | 09-04-2008 |
20080218286 | Compact Automatic Impedance Adapter in a Waveguide - The invention relates to a compact automatic impedance adapter in a waveguide, characterised in that the impedance is controlled by plungers, filling the entire guide with a magic-tee coupler plane E/plane H modifying the electrical and magnetic field, one plunger modifying the electrical field (E) in the guide and the second modifying the magnetic field (H). | 09-11-2008 |
20080218287 | CIRCUIT AND METHOD FOR ADJUSTING IMPEDANCE - An impedance adjusting circuit includes a semiconductor device accommodated in a semiconductor device case which has case pins and having a folded conductive line; an external reference resistor connected between a positive power supply line and a first one of the case pins, wherein a first line between the first case pin and the semiconductor device has a specific resistance; a first reference voltage generation resistor connected between the power supply line and a second one of the case pins; a second reference voltage generation resistor connected between the ground and a third one of the case pins; a resistance circuit comprising a second line between the second case pin and the folded conductive line and a third line between the third case pin and the folded conductive line, wherein a resistance between the second case pin and the third case pin is equal to the specific resistance; and a fourth line connected from the semiconductor device to the ground through the second reference voltage generation resistor and having a resistance equal to the specific resistance. The semiconductor device includes an adjusting circuit having a buffer and configured to adjust an output impedance of the buffer to be adaptive for a predetermined impedance. | 09-11-2008 |
20080238567 | Electrical Component for the Front End Circuit of a Transceiver - An electrical component is described with a first signal path (TX, RX | 10-02-2008 |
20080258836 | Impedance matching methods and systems performing the same - Provided are an impedance matching method and a matching system performing the same. The method includes: measuring an electrical characteristic of the power transmission line including the matching system and the load; extracting a control parameter for impedance matching from the electrical characteristic of the power transmission line; and controlling the matching system by using the control parameter. The extracting of the control parameter comprises utilizing an analytic coordinate system that quantitatively relates the electrical characteristic of the matching system to the electrical characteristic of the power transmission line. | 10-23-2008 |
20080278257 | Managed wideband radio frequency distribution system with signal level enabling interface device - A system and method for managing distribution of wideband radio frequency signals includes detecting an impedance signature of a device connected at the end of transmission medium. A switch is opened to apply a wideband radio frequency signal to a transmission medium for distribution. A biasing voltage can be applied to the transmission medium based on the detected impedance signature. A signal conditioning circuit is selected based on the amplitude of the biasing voltage, and the wideband radio frequency signal is distributed to an output device. | 11-13-2008 |
20080284537 | Impedance Matching Network, and Plasma Processing Apparatus Using Such Impedance Matching Network - Provided is an impedance matching network having: an amplitude-adjusting variable capacitor and a phase-adjusting variable capacitor that are positioned between an input terminal and an output terminal, matching being achieved by adjustment of values of the variable capacitors; a first capacitor connected in series to one of the variable capacitors; a first switch connected in parallel to the one of the variable capacitors; and a unit operable to a) keep the first switch to an ON state while the input terminal does not receive RF power, and b) bring the first switch to an OFF state immediately after an initial start-up of a load connected to the output terminal after the input terminal has started to receive RF power. | 11-20-2008 |
20080303605 | RESISTANCE ADJUSTING CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT - A resistance adjusting circuit including a semiconductor integrated circuit includes a reference voltage generating circuit which generates a reference voltage corresponding to a resistance of an external resistor element connected to the semiconductor integrated circuit, a comparison voltage generating circuit which comprises a replica resistor circuit whose resistance is adjusted according to a resistance control signal and generates a comparison voltage corresponding to a resistance of the replica resistor circuit, a main body resistor circuit which has substantially the same configuration as that of the replica resistor circuit and whose resistance is adjusted according to the resistance control signal, and a control signal generating circuit which receives the reference and comparison voltages and converts the voltages to frequency signals corresponding to the voltages, integrates the frequency signals to produce integration data of the frequency signals, and generates the resistance control signal based upon a difference between the integration data. | 12-11-2008 |
20090039976 | Adaptive impedance matching apparatus,system and method with improved dynamic range - An embodiment of the present invention provides an apparatus, comprising an RF matching network connected to at least one RF input port and at least one RF output port and including one or more voltage or current controlled variable reactive elements; a voltage detector connected to the at least one RF output port via a variable voltage divider to determine the voltage at the at least one RF output port and provide voltage information to a controller that controls a bias driving circuit which provides voltage or current bias to the RF matching network; a variable voltage divider connected to the voltage detector and implemented using a multi-pole RF switch to select one of a plurality of different resistance ratios to improve the dynamic range of the apparatus; and wherein the RF matching network is adapted to maximize RF power transferred from the at least one RF input port to the at least one RF output port by varying the voltage or current to the voltage or current controlled variable reactive elements to maximize the RF voltage at the at least one RF output port. | 02-12-2009 |
20090058550 | Apparatus, method and computer program - An apparatus comprising including a matching circuit; a first variable reactance component, having a first range of reactance values, and connected to the matching circuit and connectable to an antenna element operable in a first frequency band and a second frequency band; a second variable reactance component, having a second range of reactance values, and connected to the matching circuit; a detector for detecting a parameter, indicative of the impedance of the apparatus, over at least a part of the first range and second range of reactance values; and a controller configured to determine, using information provided by the detector, optimum ratios of second reactance values to first reactance values, at a frequency in the first frequency band, and configured to select a first optimum ratio when the second frequency band is greater than the first frequency band and configured to select a second different optimum ratio when the second frequency band is less than the first frequency band. | 03-05-2009 |
20090066438 | IMPEDANCE MATCHING METHODS AND SYSTEMS PERFORMING THE SAME - Provided are an impedance matching method and a matching system performing the same. The method includes: measuring an electrical characteristic of the power transmission line; determining a pulse mode of the power source; extracting a control parameter for impedance matching from the electrical characteristic of the power transmission line; and controlling the matching system through the control parameter, wherein the matching system is controlled differently according to the pulse mode. | 03-12-2009 |
20090085688 | Semiconductor Circuit, and Computing Device and Communications Device Using the Same - In a semiconductor circuit, an impedance adjustment circuit having the characteristics same as those of a circuit having the nonlinear resistance characteristics is configured to include an operating point calculation circuit automatically calculating an operating point with a reference resistance through feedback control, and an impedance calculation circuit calculating the impedance at the operating point found by the operating point calculation circuit. The impedance adjustment circuit is also provided with an impedance determination circuit that determines whether or not the impedance found by the impedance calculation circuit is in a predetermined range. These components, i.e., the operating point calculation circuit, the impedance calculation circuit, and the impedance determination circuit, are provided each two for High-side and Low-side impedance adjustment use. | 04-02-2009 |
20090134949 | METHODS AND APPARATUSES FOR INDUCTOR TUNING IN RADIO FREQUENCY INTEGRATED CIRCUITS - An apparatus for matching impedance within a Radio Frequency (RF) integrated circuit is presented. The apparatus includes a first impedance element placed in an RF signal path, an first inductor fabricated on the integrated circuit and connected to the first impedance element, and an adjustable capacitance circuit connected in series with the first inductor and placed between the first inductor and a ground node, where the adjustable capacitance circuit is adjusted to tune the inductance of the first inductor. A method for tuning an inductor is presented. The method includes ascertaining a target inductance value for an inductor in a RF integrated circuit, and determining a capacitance value of an adjustable capacitance circuit so that, when coupled to the inductor, the combined impedance of the adjustable capacitance circuit and the inductor is tuned to the ascertained target inductance value. | 05-28-2009 |
20090174496 | Load-Line Adaptation - According to the general concept disclosed herein, a circuit for adaptive matching of a load impedance to a predetermined load-line impedance of a load-line connected to a power amplifier output includes a fixed matching network between the power transistor and an adaptive matching network, whereby the fixed matching network acts as an impedance inverter which results in a relatively low insertion loss at high power. Results indicate that the impedance-inverting network can be used over more than a factor of 10 in impedance variation. Further, the usage of the fixed matching network, close to the power transistor, allows for the implementation of transmission zeros and/or for a well defined load impedance at a predetermined harmonic frequency, independent of the (variable) load impedance at the fundamental frequency. | 07-09-2009 |
20090206944 | METHOD AND SYSTEM FOR FREQUENCY SELECTION USING MICROSTRIP TRANSCEIVERS FOR HIGH-SPEED APPLICATIONS - Aspects of a method and system for frequency selection using microstrip transceivers for high-speed applications may include determining an operating frequency for operating one or both of a transmitter and a receiver. A frequency response and/or impedance of one or more transmission lines that may be utilized by the transmitter and/or the receiver may be controlled by adjusting one or more capacitances, communicatively coupled to the transmission lines based on the determined operating frequency. The capacitances may be coupled to the one or more transmission line at arbitrary physical spots, and may comprise capacitors and/or varactors. The capacitors and/or the varactors may be adjusted with a digital signal or an analog signal. The capacitances may comprise a matrix arrangement of capacitors and/or varactors. The one or more transmission lines may comprise a microstrip. | 08-20-2009 |
20090231054 | Multiple-carriages high gamma tuner - The present invention discloses a class of independent or linked facing tuning elements to be used in loadpull high gamma slide-screw tuner consisting of a radio-frequency (RF) transmission media comprising impedance tuning elements such as probes, corrugated probes, multi-section probes or single stub/double stub harmonic resonators. Multiple carriages can support multiple pairs of independent or dependent facing tuning elements. This invention, by decreasing the distances between the probes, allows the increasing of the modulus of the VSWR/Gamma. Also two dependent probes can be controlled with only two remote controls, one for the VSWR/Gamma phase control and another one for the VSWR/Gamma amplitude control. | 09-17-2009 |
20090243748 | SEMICONDUCTOR DEVICE - The present invention is directed to adjust a resistance value of an output buffer on the basis of a resistance value of an external resistor. A potential according to a resistance ratio between an external resistor and each of resistance adjusters is detected by a code generator. In the code generator, code signals for adjusting resistance are adjusted in accordance with the detection result. The resistance value of each of the resistance adjusters is adjusted to an external resistor. Further, by code signals with which the resistance value of each of the resistance adjusters is adjusted to the resistance value of the external resistor, the resistance of the resistance value of an output buffer is adjusted. | 10-01-2009 |
20090322443 | IMPEDANCE TUNER SYSTEMS AND PROBES - An impedance tuner may include a transmission media for propagating RF signals, a reflection magnitude control device mounted in a fixed position relative to a direction of signal propagation along said transmission media, and a phase shifter to control a reflection phase. A multi-section probe for an impedance tuner system may include a plurality of probe sections and a holder structure for mechanically supporting the plurality of probe sections. | 12-31-2009 |
20100026410 | TRANSCEIVER DEVICE AND IMPEDANCE MATCHING METHOD - A transceiver device and an impedance matching method are provided. In the impedance matching method, a plurality of matching modes is set. Each matching mode includes a default impedance and a corresponding default power. In addition, one of the matching modes is selected for outputting a transmission signal to a load. Besides, a response signal derived from the transmission signal is received. Further, whether the default impedance is matched with an impedance of the load or not is determined according to a parameter of the response signal. Thereby, the echo signal can be restrained from being generated. | 02-04-2010 |
20100073103 | METHODS FOR TUNING AN ADAPTIVE IMPEDANCE MATCHING NETWORK WITH A LOOK-UP TABLE - Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes. | 03-25-2010 |
20100073104 | Tune Range Limiter - An impedance matching network includes a first input port that receives radio frequency (RF) power and includes an input impedance, an output port that provides the RF power and includes an output impedance, and a variable capacitance module that varies the output impedance. The variable capacitance module includes a first variable capacitor, a second variable capacitor, a first motor, and a second motor that adjusts a capacitance of the second variable capacitor. A relationship between a desired value of the capacitance and an actual value of the capacitance is dependent on a capacitance of the first variable capacitor. | 03-25-2010 |
20100156552 | ADAPTIVE MATCHING NETWORK - A system that incorporates teachings of the present disclosure can include, for example, an apparatus having a matching network adapted to reduce a magnitude of a signal reflection at a port of the matching network. The matching network can have one or more controllable variable reactive elements. A controller can be adapted to determine reflection coefficient information from incident and reflected waves sampled at the port of the matching network, and follow at least one cycle of a coarse tune process for generating one or more control signals to tune one or more reactances of the one or more controllable variable reactive elements. Additional embodiments are disclosed. | 06-24-2010 |
20100164639 | METHOD AND APPARATUS FOR ADAPTIVE IMPEDANCE MATCHING - A system that incorporates teachings of the present disclosure may include, for example, an adaptive impedance matching network having an RF matching network coupled to at least one RF input port and at least one RF output port and comprising one or more controllable variable reactive elements. The RF matching network can be adapted to reduce a level of reflected power transferred from said at least one input port by varying signals applied to said controllable variable reactive elements. The one or more controllable variable reactive elements can be coupled to a circuit adapted to map one or more control signals that are output from a controller to a signal range that is compatible with said one or more controllable variable reactive elements. Additional embodiments are disclosed. | 07-01-2010 |
20100164640 | METHOD AND APPARATUS FOR ADAPTIVE IMPEDANCE MATCHING - A system that incorporates teachings of the present disclosure may include, for example, a matching network having one or more controllable variable reactive elements coupled to at least one input port and at least one output port. The one or more controllable variable reactive elements can be adapted to increase power transferred from the at least one input port to the at least one output port responsive to signals generated by a controller adapted to adjust one or more reactances within the matching network according to a mode of operation of a device detected by the controller. Additional embodiments are disclosed. | 07-01-2010 |
20100164641 | METHOD AND APPARATUS FOR ADAPTIVE IMPEDANCE MATCHING - A system that incorporates teachings of the present disclosure may include, for example, an apparatus having one or more controllable variable reactive elements coupled to at least one input port and at least one output port, and a voltage detector coupled to the at least one output port to provide voltage information to a controller. The controller can be adapted to generate one or more control signals responsive to the voltage information provided by the voltage detector. The one or more controllable variable reactive elements can be coupled to a circuit adapted to map the one or more control signals that are output from the controller to a signal range that is compatible with said one or more controllable variable reactive elements. Additional embodiments are disclosed. | 07-01-2010 |
20110012689 | Impedance Adjustment Circuit for Adjusting Terminal Resistance and Related Method - An impedance adjustment circuit for adjusting a terminal resistance includes a resistance evaluation unit and a terminal resistor unit. The resistance evaluation unit is utilized for evaluating a ratio of an off-chip resistor and a basic resistor to generate a control signal by a successive approximation method. The terminal resistor unit is coupled to the resistance evaluation unit, and is utilized for deciding a number of shunt basic resistors to provide a matched terminal resistance according to the control signal. | 01-20-2011 |
20110043298 | System for establishing communication with a mobile device server - An embodiment of the present invention provides an apparatus, comprising an RF matching network connected to at least one RF input port and at least one RF output port and including one or more voltage or current controlled variable reactive elements; a voltage detector connected to the at least one RF output port via a variable voltage divider to determine the voltage at the at least one RF output port and provide voltage information to a controller that controls a bias driving circuit which provides voltage or current bias to the RF matching network; a variable voltage divider connected to the voltage detector and implemented using a multi-pole RF switch to select one of a plurality of different resistance ratios to improve the dynamic range of the apparatus; and wherein the RF matching network is adapted to maximize RF power transferred from the at least one RF input port to the at least one RF output port by varying the voltage or current to the voltage or current controlled variable reactive elements to maximize the RF voltage at the at least one RF output port. | 02-24-2011 |
20110063042 | TUNABLE MICROWAVE DEVICES WITH AUTO-ADJUSTING MATCHING CIRCUIT - An embodiment of the present invention provides an apparatus, comprising an input port and a dynamic impedance matching network capable of determining a mismatch at the input port and dynamically changing the RF match by using at least one matching element that includes at least one voltage tunable dielectric capacitor. The matching network may be a “Pi”, a “T”, or “ladder” type network and the apparatus may further comprise at least one directional coupler capable of signal collection by sampling a portion of an incident signal, a reflected signal or both. In an embodiment of the present invention, the apparatus may also include a control and power control & logic unit (PC LU) to convert input analog signals into digital signals and sensing VSWR phase and magnitude and processing the digital signals using an algorithm to give it a voltage value and wherein the voltage values may be compared to values coming from the coupler and once compared and matched, the values may be passed to a Hi Voltage Application Specific Integrated Circuit (HV ASIC) to transfer and distribute compensatory voltages to the matching network elements. Additional embodiments are disclosed. | 03-17-2011 |
20110163824 | ELECTRONIC CIRCUIT AND ELECTRONIC DEVICE - An electronic circuit includes a first inductor, a second inductor that is magnetically coupled with the first inductor, induced current flowing through the second inductor by a magnetic field generated by the first inductor, and a current changing part that is connected to the second inductor and is configured to change the induced current that flows through the second inductor. | 07-07-2011 |
20120013416 | IMPEDANCE MATCHING METHODS AND SYSTEMS PERFORMING THE SAME - Provided are an impedance matching method and a matching system performing the same. The method includes: measuring an electrical characteristic of the power transmission line including the matching system and the load; extracting a control parameter for impedance matching from the electrical characteristic of the power transmission line; and controlling the matching system by using the control parameter. The extracting of the control parameter comprises utilizing an analytic coordinate system that quantitatively relates the electrical characteristic of the matching system to the electrical characteristic of the power transmission line. | 01-19-2012 |
20120056689 | METHODS FOR TUNING AN ADAPTIVE IMPEDANCE MATCHING NETWORK WITH A LOOK-UP TABLE - Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes. | 03-08-2012 |
20120086517 | IMPEDANCE STABILIZATION DEVICE - Provided is an impedance stabilization device having a configuration in which a circuit including a series matching impedance element ( | 04-12-2012 |
20120098614 | 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. A controller may be coupled to the detector circuit and the RF matching network and configured to receive the DC magnitude and phase error signals and to vary an impedance of the RF matching network in response to the DC magnitude and phase error signals. | 04-26-2012 |
20120112848 | Automatic Termination Circuit and Method - An electronic circuit arranged to terminate automatically a plurality of conductors at or near a node of a network comprising: a first input terminal electrically coupled to a first output terminal; a second input terminal electrically coupled to a second output terminal; selectable current limiting means (SCLM) arranged to limit an amount of current that may flow between the second output terminal and the second input terminal; and detecting means arranged to control switching means operable to switch the circuit between a first and a second condition responsive to the electrical potential Vx of the second output terminal, wherein in the first condition the circuit is a terminating circuit and the SCLM is selected to have a first current limit, and in the second condition the circuit is a continuing circuit and the SCLM is selected to have a second current limit. | 05-10-2012 |
20120119842 | TUNING METHODS FOR TUNABLE MATCHING NETWORKS - Methods for tuning a tunable matching network can involve comparing a source impedance of a source to a real part of a load impedance of a load. Depending on characteristics of the network, capacitances of one or more tunable capacitors can be set to correspond to device boundary parameters, and capacitances of remaining tunable capacitors can be set based on a predetermined relationship between the parameters of the capacitors, the source, the load, and other components. From these initially determined values, the capacitance value of one or more of the capacitors can be adjusted to fall within device boundary conditions and achieve a perfect or at least best match tuning configuration. | 05-17-2012 |
20120119843 | TUNABLE MICROWAVE DEVICES WITH AUTO ADJUSTING MATCHING CIRCUIT - An impedance matching circuit includes a matching network for coupling to a variable load, where the matching network has a first port and a second port, and where the variable load is coupled to one of the first port or the second port. The matching network can have one or more variable dielectric capacitors, where the one or more variable dielectric capacitors are operable to receive one or more variable voltage signals to cause the one or more variable dielectric capacitors to change an impedance of the matching network, and where the change in the impedance of the matching network causes an increase in power transferred from the first port to the second port or from the second port to the first port. | 05-17-2012 |
20120119844 | TUNABLE MICROWAVE DEVICES WITH AUTO-ADJUSTING MATCHING CIRCUIT - A variable impedance circuit includes a matching network for coupling to a tunable device, where the matching network has a first port and a second port, where the tunable device is coupled to one of the first port or the second port, and where the matching network has one or more variable dielectric capacitors. The one or more variable dielectric capacitors can be operable to receive a first of one or more variable voltage signals to cause the one or more variable dielectric capacitors to change a first impedance of the matching network. The tunable device can be operable to receive a second of one or more variable voltage signals to cause a change in a second impedance of the tunable device. | 05-17-2012 |
20120154069 | METHODS FOR TUNING AN ADAPTIVE IMPEDANCE MATCHING NETWORK WITH A LOOK-UP TABLE - Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes. | 06-21-2012 |
20120176205 | VARIABLE MATCHING CIRCUIT - A first line stub SB | 07-12-2012 |
20120223786 | METHOD AND APPARATUS FOR ADAPTIVE IMPEDANCE MATCHING - A system that incorporates teachings of the present disclosure may include, for example, an apparatus having an RF matching network including one or more variable reactive elements, where the RF matching network has a first port coupled to a transceiver and second port coupled to an antenna. The RF matching network can modify signal power transferred between the first port and the second port according to one or more bias signals applied to the one or more variable reactive elements to vary a variable impedance of the RF matching network. The one or more variable reactive elements are coupled to a circuit that maps one or more control signals to the one or more bias signals, and wherein the one or more control signals are generated by a controller according to a mode of operation of a communication device. Additional embodiments are disclosed. | 09-06-2012 |
20120256698 | Automatic Impedance Matching Method for Radiofrequency Circuit and Modular Emission or Reception Chain - As relates to the automatic impedance matching of a radiofrequency system, a system comprises three modules. In a matching phase a matching computation module is connected in a detachable manner between an amplification module and an antenna module containing an antenna, a matching impedances network, and memory means for storing control data of the network; then a matching computation is carried out; the computation module supplies control data of the network to the memory device. In a phase of using the system, the second module is removed and the antenna module is connected in a detachable manner directly to the amplification module, the matching network being controlled by the stored control data, which correspond to the desired impedance matching. | 10-11-2012 |
20130002367 | WIDEBAND LOW FREQUENCY IMPEDANCE TUNER - Compact electro-mechanical impedance tuners for frequencies as low as 1 MHz use the concept of a cylindrical transmission line with the signal conductor being a spiral wire wound around a metallic cylinder and separated from it by a layer of dielectric material. A conductive wheel is running over the spiral wire and, as the cylinder rotates, the transmission phase between one terminal of the spiral wire and the wheel changes. By connecting a rotating parallel plate variable capacitor to the wheel creates an impedance tuner, capable of generating high reflection factors at very low frequencies at any area of the Smith chart. By cascading two or more such tuners allows tuning at harmonic frequencies at the rate of one frequency per tuner section. The reduction in size comparing with traditional transmission line tuners is of the order of 150:1. | 01-03-2013 |
20130009720 | WIDE BANDWIDTH AUTOMATIC TUNING CIRCUIT - An automatic tuning circuit for matching an antenna to a radio receiver. The automatic tuning circuit includes a tunable non-Foster circuit for coupling the receiver and the antenna; and sensing and feedback circuits for sensing the combined capacitance of the tunable non-Foster circuit and the antenna and for tuning the tunable non-Foster circuit to automatically minimize the combined capacitance of the tunable non-Foster circuit and the antenna. | 01-10-2013 |
20130009721 | COMPACT HARMONIC IMPEDANCE TUNER - An impedance matching, harmonic electromagnetic tuner has an airline with multiple slots to reduce the overall length of the tuner. At least one RF probe is disposed within each slot so that it can be moved parallel to, towards and/or away from a center conductor. Each of the probes may be put in user selectable positions to create a user selectable impedance. | 01-10-2013 |
20130009722 | WIDE BANDWIDTH AUTOMATIC TUNING CIRCUIT - An automatic tuning circuit for matching an antenna to a radio receiver. The automatic tuning circuit includes a tunable non-Foster circuit for coupling the receiver and the antenna; and sensing and feedback circuits for sensing the combined capacitance of the tunable non-Foster circuit and the antenna and for tuning the tunable non-Foster circuit to automatically minimize the combined capacitance of the tunable non-Foster circuit and the antenna. | 01-10-2013 |
20130069735 | LOAD IMPEDANCE DECISION DEVICE, WIRELESS POWER TRANSMISSION DEVICE, AND WIRELESS POWER TRANSMISSION METHOD - A load impedance decision device, a wireless power transmission device, and a wireless power transmission method are provided. At least one of a distance and an angle between two resonators may be measured. A load impedance may be determined based on at least one of the measured distance and the measured angle. When the distance between the two resonators changes, a high power transfer efficiency may be maintained without using a separate matching circuit. Where the load impedance is determined, a test power may be transmitted. Depending on a power transfer efficiency of the test power, the load impedance may be controlled and power may be wirelessly transmitted from the source resonator to the target resonator. | 03-21-2013 |
20130127561 | Tunable Microwave Devices with Auto-Adjusting Matching Circuit - An embodiment of the present disclosure provides an impedance matching circuit including a matching network. The matching network includes a first port and a second port, and one or more variable reactance components. The one or more variable reactance components are operable to receive one or more variable voltage signals to cause the one or more variable reactance components to change an impedance of the matching network. At least one of the one or more variable reactance components includes a first conductor coupled to one of the first port or the second port of the matching network, a second conductor, and a tunable material positioned between the first conductor and the second conductor. Additionally, at least one of the first conductor and the second conductor are adapted to receive the one or more variable voltage signals to cause the change in the impedance of the matching network. Additional embodiments are disclosed. | 05-23-2013 |
20130181787 | ADAPTIVE IMPEDANCE MATCHING - An embodiment of the present invention provides a method for limiting tuning of a matching network having variable reactive elements coupled to a variable load impedance to at least reduce an undesirable effect caused by an RF signal. Other embodiments are disclosed. | 07-18-2013 |
20130187726 | TUNABLE VARIABLE IMPEDANCE TRANSMISSION LINE - A low profile antenna using a cavity-backed central radiating surface surrounded by one or more ground plane surfaces. Passively reconfigurable structure provide frequency dependent coupling between the surfaces. The frequency dependent couplings may be implemented using meander line structures, Variable Impedance Transmission Lines (VITLs), or tunable VITLs that used interspersed electroactive sections. | 07-25-2013 |
20130187727 | METHODS FOR TUNING AN ADAPTIVE IMPEDANCE MATCHING NETWORK WITH A LOOK-UP TABLE - Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes. | 07-25-2013 |
20130207736 | RESISTANCE MEASURING CIRCUIT, RESISTANCE MEASURING METHOD, AND IMPEDANCE CONTROL CIRCUIT - A resistance measuring method includes: measuring a resistance value of a first path which is formed from an interface pad through a resistor unit to a ground node; measuring a resistance value of a second path which is formed from the interface pad to the ground node but does not pass through the resistor unit; and calculating a resistance value of the resistor unit by subtracting the resistance value of the second path from the resistance value of the first path. | 08-15-2013 |
20130234804 | Method and Circuitry for Matching Impedance - Disclosed are a method and a circuit for impedance matching. The method comprises: a peripheral impedance detection module detecting an impedance of a subscriber telephone and outputting information about the impedance of the subscriber telephone; an analog switch switching module providing an impedance matching path between the impedance of the subscriber telephone and an impedance matching module according to the information about the impedance of the subscriber telephone output by the peripheral impedance detection module; the impedance matching module providing a corresponding impedance through the impedance matching path provided by the analog switch switching module to match to said impedance of the subscriber telephone. By the present invention, the impedance matching is achieved when a wireless access box communicates with telephones with various impedance modes. The matching process is flexible, automatic, and does not need manual configuration, and the technology is simple, reliable, and of low cost. | 09-12-2013 |
20130241664 | ADAPTIVE MATCHING NETWORK - A system that incorporates teachings of the present disclosure can include, for example, an apparatus having a matching network adapted to reduce a magnitude of a signal reflection at a port of the matching network. The matching network can have one or more controllable variable reactive elements. A controller can be adapted to determine reflection coefficient information from incident and reflected waves sampled at the port of the matching network, and follow at least one cycle of a coarse tune process for generating one or more control signals to tune one or more reactances of the one or more controllable variable reactive elements. Additional embodiments are disclosed. | 09-19-2013 |
20130271234 | Device Comprising a Controlled Matching Stage - A device includes a matching stage coupled between a first signal terminal and a second signal terminal. A signal path extends between the first signal terminal and the second terminal. An adjustable impedance element is connected to the signal path. A detection circuit is coupled to the signal path and configured to derive matching information. A control circuit is coupled between the detection circuit and the adjustable impedance element. The control circuit is configured to control the adjustable impedance element. | 10-17-2013 |
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. The method includes determining at least one of a power mode or a frequency band of operation of the power amplifier module. The method further includes selecting a termination impedance of the directional coupler based on the determination using at least one switch. | 11-07-2013 |
20130321092 | HYBRID ACTIVE TUNING SYSTEMS AND METHODS - An impedance tuner system that uses at least one passive tuner and at least one active tuner to control one or more impedances at a reference plane or planes. Each of the at least one active tuners operates at a target frequency at which the impedance is to be controlled. The passive tuner is set to a passive tuner target impedance before active tuners are set to their target impedances. | 12-05-2013 |
20130321093 | NONRECIPROCAL TRANSMISSION LINE DEVICE - A nonreciprocal transmission line apparatus is provided with a cascade connection of unit cells between ports. Each unit cell includes a transmission line part for a microwave signal, and shunt branch circuits equivalently including inductive elements. Each unit cells has spontaneous magnetization or is magnetized by an external magnetic field so as to have gyrotropy by being magnetized in a magnetization direction different from a propagation direction of the transmission line part. In each of the unit cells, the shunt branch circuits includes a first stub conductor formed on one side with respect to a plane composed of the propagation direction and the magnetization direction, and a second stub conductor formed on the other side with respect to the plane, and the stub conductors have different electric length from each other. | 12-05-2013 |
20140015619 | METHOD AND APPARATUS FOR ADAPTIVE IMPEDANCE MATCHING - A system that incorporates teachings of the present disclosure may include, for example, an adaptive impedance matching network having an RF matching network coupled to at least one RF input port and at least one RF output port and comprising one or more controllable variable reactive elements. The RF matching network can be adapted to reduce a level of reflected power transferred from said at least one input port by varying signals applied to said controllable variable reactive elements. The one or more controllable variable reactive elements can be coupled to a circuit adapted to map one or more control signals that are output from a controller to a signal range that is compatible with said one or more controllable variable reactive elements. Additional embodiments are disclosed. | 01-16-2014 |
20140091875 | IMPEDANCE ADJUSTING APPARATUS - An impedance adjustment apparatus of the invention performs impedance matching using characteristic parameters, even where a high frequency power source of variable frequencies is used. The apparatus is applicable to a power supply system using a high frequency power source of variable frequencies. Characteristic parameters obtained by targeting a portion of combinations of position information (C) of a variable capacitor and output frequency information (F) of the power source are stored in a memory. A T-parameter acquisition unit acquires characteristic parameters corresponding to (C | 04-03-2014 |
20140097911 | SEMICONDUCTOR DEVICE - A device, comprising an output terminal; an output circuit coupled to the output terminal and having an adjustable impedance; and an impedance adjustment circuit adjusting stepwise the adjustable impedance so as to head toward a first reference impedance. The impedance adjustment circuit changes the adjustable impedance by a first amount when the adjustable impedance is within a first range, and changes the adjustable impedance by a second amount when the adjustable impedance is out of the first range. The first amount is smaller than the second amount. | 04-10-2014 |
20140191819 | IMPEDANCE MATCHING DEVICE AND CONTROL METHOD - In an impedance matching device, a storage unit stores a control value representing a load value and a value equivalent to input impedance in advance. The control value identifies inductance and capacitance values matching a predetermined impedance value by use of either a first or second matching circuit. An impedance estimation unit estimates input impedance of the power transmission antenna. The load value estimation unit estimates load value of a circuit connected to a power reception antenna and consuming transmitted electric power. A circuit selection unit electrically connects the first matching circuit, the second matching circuit, or a through circuit per the load value and the input impedance equivalent value. A control value output unit reads out the control value stored in the storage unit based on the load value and the input impedance equivalent value, and outputs the control value to the circuit selected by the circuit selection unit. | 07-10-2014 |
20140266491 | System And Method For Using A Reference Plane To Control Transmission Line Characteristic Impedance - A system for using a reference plane to control transmission line characteristic impedance includes a signal trace located in a multi-layer structure and at least one constant thickness reference plane proximate to the signal trace, the constant thickness reference plane located with respect to the signal trace so as to provide a desired characteristic impedance between the signal trace and the constant thickness reference plane. | 09-18-2014 |
20140266492 | Virtual RF Sensor - A radio frequency (RF) generation system includes an impedance determination module that receives an RF voltage and an RF current. The impedance determination module further determines an RF generator impedance based on the RF voltage and the RF current. The RF generation system also includes a control module that determines a plurality of electrical values based on the RF generator impedance. The matching module further matches an impedance of a load based on the RF generator impedance and the plurality of electrical components. The matching module also determines a 2 port transfer function based on the plurality of electrical values. The RF generation system also includes a virtual sensor module that estimates a load voltage, a load current, and a load impedance based on the RF voltage, the RF generator, the RF generator impedance, and the 2 port transfer function. | 09-18-2014 |
20140320229 | TRANSMISSION LINE DRIVER WITH OUTPUT SWING CONTROL - A transmission line driver including an output configured to have a load impedance is provided. The transmission line driver includes a pull-up circuit coupled in series with the output. The transmission line driver also includes a pull-down circuit coupled in series with the output. The transmission line driver includes a shunt circuit having an adjustable impedance. The shunt circuit is coupled in parallel to the output. The shunt circuit is coupled to the pull-up circuit and the pull-down circuit. The shunt circuit is configured to receive a shunt control signal to adjust the adjustable impedance to provide linear control of an output swing at the output. | 10-30-2014 |
20140347141 | RESISTANCE ADJUSTING CIRCUIT AND RESISTANCE ADJUSTING METHOD - A resistance adjusting circuit including, a reference resistor, a first power source configured to output a first voltage, a first current source configured to output a first current based on a reference current set by using the reference resistor, a first variable resistor, a second current source configured to output a second current obtained by multiplying the first current by a reciprocal ratio, the reciprocal ratio being obtained as a reciprocal number of a ratio of a target resistance of the first variable resistor to a resistance of the reference resistor, and a controller configured to set a resistance of the first variable resistor so that a voltage at a second terminal of the reference resistor and a voltage at a connecting part of the first variable resistor and the second current source become equal to each other. | 11-27-2014 |
20150035613 | ULTRA-WIDEBAND IMPEDANCE TUNER - A mechanical impedance tuner has at least two probe carriages mounted for movement along an axis parallel to the center conductor. The at least two probe carriages including a first probe carriage and a second probe carriage. Each probe carriage has at least N probes where N is an integer equal to or greater than one, and at least one of the N probes is mechanically different or of different nominal geometry from the probes on at least one of the other carriages so that each such probe has an non-identical frequency response. | 02-05-2015 |
20150137905 | IMPEDANCE MATCHING DEVICE AND METHO - An impedance matching device includes a matching element array unit with a matching element array to which a transmission pulse and a received pulse pass, an extraction/calculation unit extracting pulse information from the transmission pulse and the received pulse, calculating impedance values corresponding to the pulse information, and calculating an impedance value having best response characteristics of the received pulse with respect to the transmission pulse as a matching impedance value, an array control unit routing the matching element array unit according to the matching impedance value, a first converter converting a frequency of the transmission pulse into a carrier frequency and outputting the transmission pulse to the matching element array unit, a second converter converting the carrier frequency into a low frequency, and a converter control unit outputting a signal for controlling the frequency converting of the first converter and the second converter. | 05-21-2015 |
20150341013 | COMMUNICATION CIRCUIT WITH IMPEDANCE MATCHING - Aspects of the present disclosure are directed to addressing impedance-matching issues. As may be implemented in connection with one or more embodiments, an apparatus includes an integrated circuit (IC) chip having a signal-connection terminal and processing circuitry that passes signals along a communication path that is within the IC chip and connected to the signal-connection terminal. Impedance-matching circuitry operates to provide impedance-matching for the communication path, therein mitigating signal loss due to impedance-mismatching. A chip-mounting structure secures the IC chip and electrically connects thereto at the signal-connection terminal. | 11-26-2015 |
20150349740 | IMPEDANCE MATCHING DEVICE, LINEAR MOTION MODULE, AND RADIO FREQUENCY POWER SUPPLY DEVICE - An impedance matching device includes a first variable capacitor connected to an RF power source and including a first shaft moving linearly, a first linear motion unit axially coupled to the first shaft of the first variable capacitor to provide linear motion, a first insulating joint connecting the first shaft to a first driving shaft of the first linear motion unit, and a first displacement sensor adapted to measure a movement distance of the first driving shaft of the first linear motion unit. | 12-03-2015 |
20160077140 | Low Power On-Chip Impedance Detector - An impedance detector for measuring an impedance of a circuit comprises a frequency source, a resistor connected in between the frequency source and the circuit to be measured, a phase shift circuit for applying a phase shift to a signal from the frequency source, a first multiplier for mixing the signal from the frequency source with a signal from the circuit to be measured, a second multiplier for mixing the phase shifted signal with the signal from the circuit to be measured, and a processing circuit for determining an indication of an impedance of the circuit to be measured in dependence on the first mixed signal and the second mixed signal. | 03-17-2016 |