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128results about How to "Impedance matching" patented technology

IC tag and IC tag attachment structure

A first metal plate for transmission and a second metal plate for transmission are closely-attached to a first surface and a second surface of a dielectric body, respectively. An outer edge of the first metal plate substantially symmetrically faces an outer edge of the second metal plate via the dielectric body. A metal plate for matching is arranged inside a hole formed on the second metal plate, with a slit formed with an inner wall of the hole, and is fixed to the dielectric body. The metal plate for matching is electrically connected to the first metal plate via a through hole penetrating the dielectric body. An IC chip is surface-mounted to connect the second metal plate with the metal plate for matching.
Owner:DENSO CORP

Impedance-tuned terminal contact arrangement and connectors incorporating same

A terminal contact arrangement for a connector promotes reduction in deviation of the impedance of the connector when mated to an opposing connector and energized. The connector has an insulative housing with a plurality of terminal-receiving passages disposed in it. Conductive terminals are supported in some, but not all of the passages. The terminal contain distinct terminal sets that include a pair of differential signal terminals and at least two associated ground reference terminals. The two associated ground reference terminals are interconnected together so that electrically, they act as a single ground terminal having a width equal to the sum of the widths of the two connected ground reference terminals. The ground reference terminals of the sets are disposed in a single row of terminals, while the differential signal terminals of the same terminal set are disposed in another row of terminals spaced apart from the row of ground reference terminals. The differential signal terminals are separated from each other within their terminal row by an empty passage so that the two differential signal terminals of each terminal set are spaced farther apart from each other than they are spaced apart from their associated ground reference terminals.
Owner:MOLEX INC

Impedance-tuned terminal contact arrangement and connectors incorporating same

A terminal contact arrangement for a connector promotes reduction in deviation of the impedance of the connector when mated to an opposing connector and energized. The connector has an insulative housing with a plurality of terminal-receiving passages disposed in it. Conductive terminals are supported in some, but not all of the passages. The terminal contain distinct terminal sets that include a pair of differential signal terminals and at least two associated ground reference terminals. The two associated ground reference terminals are interconnected together so that electrically, they act as a single ground terminal having a width equal to the sum of the widths of the two connected ground reference terminals. The ground reference terminals of the sets are disposed in a single row of terminals, while the differential signal terminals of the same terminal set are disposed in another row of terminals spaced apart from the row of ground reference terminals. The differential signal terminals are separated from each other within their terminal row by an empty passage so that the two differential signal terminals of each terminal set are spaced farther apart from each other than they are spaced apart from their associated ground reference terminals.
Owner:MOLEX INC

Broadband antenna

A broadband antenna has a substrate, a coupling conductor, a conductor string, a ground conductor and a ground plane. The coupling conductor has a first coupling member and a second coupling member being separated from each other. The conductor string and the ground conductor are connected to the second coupling member. The conductor string extends along a direction opposite to the second coupling member. The ground conductor is connected to the ground plane. The broadband antenna uses the coupling conductor and the ground conductor to adjust input impedance for impedance match. The conductor string functions as a multi level resonance circuit to increase impedance bandwidth.
Owner:ADVANCED CONNECTEK INC

Wireless communication high-frequency circuit and wireless communication apparatus

A wireless communication high-frequency circuit in which a broadband amplifier is shared between multiple communication frequency bands and multiple duplexers are used in order to support the multiple communication frequency bands to improve the transmission efficiency includes a first impedance matching circuit between an output port of an amplifier and a relay switch. A first signal path extends from the output port of the amplifier to the ground in the first impedance matching circuit. An inductor and a variable capacitance element are provided on the first signal path. Second impedance matching circuits are provided between output ports and the input port of the relay switch and transmission signal input ports of duplexers, respectively.
Owner:MURATA MFG CO LTD

Wireless IC device component and wireless IC device

ActiveUS20120006904A1Improve radiation characteristicBroaden frequency bandSolid-state devicesLoop antennasCapacitanceRadiation
A wireless IC device includes a wireless IC chip, a coupling electrode, and a radiation plate. The coupling electrode includes coupling portions arranged to be coupled to the wireless IC chip and a pair of opposing ends. The pair of opposing ends are capacitively coupled to each other and oppose the radiation plate to be coupled to the radiation plate. The wireless IC chip uses the radiation plate as an antenna to transmit and receive signals having certain frequencies to and from an RFID system.
Owner:MURATA MFG CO LTD

RF system, magnetic filter, and high voltage isolation for an inductively coupled plasma ion source

In a plasma ion source having an induction coil adjacent to a reactor chamber for inductively coupling power into the plasma from a radio frequency power source and designed for negative and positive ion extraction, a method for operating the source according to the invention comprises providing radio frequency power to the induction coil with a RF amplifier operating with a variable frequency connected to a matching network mainly comprised of fixed value capacitors. In this device the impedance between the RF power source and the plasma ion source is matched by tuning the RF frequency rather than adjusting the capacitance of the matching network. An option to use a RF power source utilizing lateral diffused metal oxide semiconductor field effect transistor based amplifiers is disclosed.
Owner:OREGON PHYSICS

Power supply device, power receiving device and vehicle including power receiving device, and control method for power supply system

A power supply device supplies electric power to a power receiving device including a power receiving unit in a non-contact manner. The power supply device includes a power source device that generates electric power with a predetermined frequency; a power transmitting unit that receives the electric power from the power source device, and that resonates with the power receiving unit through an electromagnetic field, thereby transmitting the electric power to the power receiving unit in the non-contact manner; a detection device that detects reflected electric power to the power source device; a communication device that receives information regarding a power receiving situation in the power receiving device; and a control device that controls electric power transmission from the power transmitting unit based on the information regarding the power receiving situation and the reflected electric power.
Owner:TOYOTA JIDOSHA KK

Connector for connecting printed boards

In a connector, a contact group has a signal contact and a ground contact, and the signal contact is arranged adjacently to both sides of the ground contact. Each of the signal contact and the ground contact has a contact portion connected to a partner side contact and also has a terminal portion connected to a connecting object. The pitch intervals between the terminal portions of the respective contacts of the contact group are equally set. The contact portion of the signal contact approaches the contact portion of the ground contact. Thus, the pitch interval between the contact portions of the adjacent signal contacts is widened with respect to the pitch interval between the terminal portions.
Owner:JAPAN AVIATION ELECTRONICS IND LTD

Low voltage data transmitting circuit and associated methods

A low voltage data transmitting circuit (LVDTC) may be connected to a first transmission line that transmits a first voltage signal to a receiver and a second transmission line that transmits a second voltage signal to the receiver. The LVDTC includes a first resistor coupled to the first transmission line, a second resistor coupled to the second transmission line, and a control unit coupled to the first transmission line and the second transmission line, the control unit being configured to control voltage levels of the first and second voltage signals such that the voltage levels of the first and second voltage signals are higher than a ground voltage level of the receiver, wherein the first and second voltage signals may constitute a differential pair.
Owner:SAMSUNG ELECTRONICS CO LTD

Impedance-adjustable type refrigerating machine

The invention provides an impedance-adjustable type refrigerating machine. The impedance-adjustable type refrigerating machine comprises an impedance adjusting unit, a refrigerating unit and a phase modulating unit which are sequentially connected, wherein the impedance adjusting unit is used for regulating acoustic impedance of a refrigerating machine inlet, namely a joint of the driver and the impedance adjusting unit to match acoustic power of pressure waves input by the driver; the phase modulating unit is used for adjusting the impedance of a working gas in the refrigerating unit; and the refrigerating unit is used for refrigerating the phase-modulated working gas. According to the impedance-adjustable type refrigerating machine, the impedance adjusting unit is arranged, so that an impedance phase angle of the refrigerating machine inlet can be adjusted to any needed value for enabling the refrigerating machine inlet to match with the driver better, and therefore, the driver and the refrigerating unit simultaneously work at the most ideal state.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI

Electrical connector having a ground plane with independently configurable contacts

An electrical connector includes a housing, a plurality of contact pins, and at least one shield plane provided on the outside of the housing. Some of the contact pins are electrically connected to the at least one shield plane to define shield contact pins and some of the contact pins are not electrically connected to the at least one shield plane to define signal contact pins. In one embodiment, the shield plate includes deformable finger portions to be pressed against selected contact pins. In another embodiment, the contacts include shield engaging contact arms, some of which are to be removed while others remain. The removal may be performed while the contacts are on a carrier strip.
Owner:SAMTEC

Impedance-tuned terminal contact arrangement and connectors incorporating same

A terminal contact arrangement for a connector promotes reduction in deviation of the impedance of the connector when mated to an opposing connector and energized. The connector has an insulative housing with a plurality of terminal-receiving passages disposed in it. Conductive terminals are supported in some, but not all of the passages. The terminal contain distinct terminal sets that include a pair of differential signal terminals and at least two associated ground reference terminals. The two associated ground reference terminals are interconnected together so that electrically, they act as a single ground terminal having a width equal to the sum of the widths of the two connected ground reference terminals. The ground reference terminals of the sets are disposed in a single row of terminals, while the differential signal terminals of the same terminal set are disposed in another row of terminals spaced apart from the row of ground reference terminals. The differential signal terminals are separated from each other within their terminal row by an empty passage so that the two differential signal terminals of each terminal set are spaced farther apart from each other than they are spaced apart from their associated ground reference terminals.
Owner:MOLEX INC

Low noise amplifier with fixed loss bypass

A low noise amplifier (LNA) has a selectable bypass signal path integrated into the same integrated circuit (IC) as the amplifier components. In a normal mode of operation, an integrated mode switch allows an appropriate biasing signal to be applied LNA transistors, which function to amplify an input signal and produce an amplified output signal. In an attenuation mode, which is activated to handle large input signals, the LNA transistors are switched off and the input signal is attenuated by a voltage divider, which provides an attenuated output on a signal path that bypasses the LNA amplifier. An attenuation switching signal not only operates the mode switch in the LNA, but also selects between the normal and bypass outputs of the LNA, for further amplification downstream of the LNA.
Owner:NORTHROP GRUMMAN SYST CORP

Antenna devices to suppress ground plane interference

Antenna devices that include a frequency selective surface (FSS) resistive card (R-card) to suppress ground plane interference are provided. The antenna device can include a tightly coupled dipole array (TCDA), and the FSS R-card can be a saw-tooth ring that only attenuates the intended frequencies. The antenna device can be an extremely wideband phased array with integrated feeding network and spatial scanning down to 60°.
Owner:FLORIDA INTERNATIONAL UNIVERSITY

Impedance-tuned connector

A connector with controlled impedance includes at least one set of differential signal terminals with an associated ground terminal. The ground terminal has a symmetric configuration, while the two differential signal terminals have asymmetric configurations. The asymmetric configurations permit capacitive coupling to occur primarily between the two differential signals in an area of the connector where the inductance of the connector would be high. The two differential signal terminals flank the ground terminal.
Owner:MOLEX INC +2

Wideband low-noise amplifier

InactiveUS20100060363A1High power gain characteristicNoise figure is lowAmplifier modifications to reduce noise influenceRF amplifierAudio power amplifierWideband
A wideband low-noise amplifier includes a source-degenerated common-source amplifier, a common-gate amplifier, and a matching frequency band determiner. The source-degenerated common-source amplifier is configured to amplify an input signal to output a first signal that is opposite in phase to the input signal. The common-gate amplifier is connected in parallel to the source-degenerated common-source amplifier to amplify the input signal to output a second signal that has the same phase as the input signal. The matching frequency band determiner is configured to isolate an input terminal of the source-degenerated common-source amplifier and an input terminal of the common-gate amplifier and determine a matching frequency band.
Owner:ELECTRONICS & TELECOMM RES INST

Broadband antenna

A broadband antenna has a substrate, a coupling conductor, a conductor string, a ground conductor and a ground plane. The coupling conductor has a first coupling member and a second coupling member being separated from each other. The conductor string and the ground conductor are connected to the second coupling member. The conductor string extends along a direction opposite to the second coupling member. The ground conductor is connected to the ground plane. The broadband antenna uses the coupling conductor and the ground conductor to adjust input impedance for impedance match. The conductor string functions as a multi level resonance circuit to increase impedance bandwidth.
Owner:ADVANCED CONNECTEK INC

Surface emission laser

InactiveUS20120230361A1Suppress increase in parasitic capacityIncreasing parasitic capacityLaser detailsLaser optical resonator constructionLight guideErbium lasers
Specifically, provided is a horizontal-cavity surface-emitting laser including, on a semiconductor substrate: a cavity structure; a waveguide layer; and a reflecting part, wherein a first electrode provided on the semiconductor substrate along side regions of the cavity structure and the reflecting part and a second electrode provided on the main surface of the cavity structure are provided, the first electrode includes an electrode (1) that is provided around one side region of the reflecting part located in the direction intersecting with the traveling direction of light guided through the waveguide layer and an electrode (2) provided around one side region of the cavity structure and the other side region of the reflecting part that are located in the direction parallel with the traveling direction of light guided through the waveguide layer, and the shape of the electrode (2) has different widths at at least two positions.
Owner:HITACHI LTD

Mobile radio device

In a mobile radio apparatus, a matching circuit is selected to meet the detected condition detected by a switching control unit. Matching of the antenna to the RF circuit can be optimized and the antenna gain deterioration can be prevented.
Owner:KK TOSHIBA

Optical device

The embodiment of the present invention provides an optical device which relates to the optical communication field, and can satisfy the impedance matching requirement of the high frequency signal transmission. The optical device comprises a first substrate, a second substrate and a transfer plate, a first conductive access is arranged on the upper surface of the first substrate, a second conductive access is arranged on the lower surface of the first substrate, and a third conductive access is arranged on the upper surface of the second substrate. A microstrip line structure is arranged on the transfer plate and comprises a transfer line arranged on the upper surface of the transfer plate, and the upper surface of the second substrate is opposite to the lower surface of the first substrate, wherein the second conductive access is attached to the third conductive access, and the transfer plate is arranged above the upper surface of the second substrate and is located in the third conductive access. One end of the transfer line is electrically connected with the first conductive access by threading, and the other end is connected with an internal element in the optical device by threading. The embodiment of the present is used for the optical device manufacture.
Owner:HISENSE BROADBAND MULTIMEDIA TECH

Broadband low-power-consumption and low-noise amplifier applied to wireless sensor network

The invention discloses a broadband low-power-consumption and low-noise amplifier applied to a wireless sensor network. The amplifier comprises an input matching circuit, a first-level amplifier circuit and a second-level amplifier circuit which are connected in sequence. The first-level amplifier circuit is a resistor feedback common source circuit structure. The second-level amplifier circuit is an active parallel feedback common gate circuit structure.
Owner:SUZHOU UNIV

Electrical connector assembly having contacts configured for high-speed signal transmission

An electrical connector assembly (1) includes a first connector (2) and a second connector (3). The first connector includes a first housing (21) and first electrical contacts (22). The second connector includes a second housing (31) and second electrical contacts (32). The first contacts include signal contacts (22A), ground contacts (22B), and shield-joint contacts (22C). The signal contacts are arranged in pairs, with each pair transmitting one set of differential signals. The signal contacts within each pair are separated by an empty passage (214). Adjacent pairs of signal contacts are separated by one ground contact or by one shield-joint contact. The second contacts are configured to correspond to the first contacts, so that the first and second contacts can electrically mate with each other to electrically interconnect the first and second connectors. The wide interval between adjacent signal contacts enables cross talk between adjacent signal contacts to be reduced.
Owner:HON HAI PRECISION IND CO LTD

Substrate with built-in functional element

The present invention has an object to provide a substrate with a built-in functional element, including the functional element above a metal plate, in which crosstalk noise between signal wirings can be reduced and higher characteristic impedance matching can be achieved. An aspect of the present invention provides a substrate with a built-in functional element, including: a metal plate that includes a concave portion and serves as a ground; the functional element that is placed in the concave portion and includes an electrode terminal; a first insulating layer that covers the functional element and is placed in contact with the metal plate; a first wiring layer including first signal wiring that is opposite the metal plate with the first insulating layer being interposed therebetween; a second insulating layer that covers the first wiring layer; and a ground layer formed of a ground plane that is opposite the first wiring layer with the second insulating layer being interposed therebetween.
Owner:NEC CORP

Antenna system for terrestrial broadcasting

Provided is an antenna system for terrestrial broadcasting. The antenna system has a dipole antenna probe receiving a broadcast signal, a signal amplifier amplifying the received broadcast signal, an antenna matching unit matching impedances between the antenna probe and the signal amplifier, an output matching unit matching impedances between an output signal of the signal amplifier and an input terminal of a broadcast receiver to which the output signal is fed, and a bias extractor converting power received from the broadcast receiver into power needed for driving the signal amplifier and supplying the converted power to the signal amplifier.
Owner:SAMSUNG ELECTRONICS CO LTD
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