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56results about How to "Solve Impedance Matching" patented technology
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Microwave radiating antenna of direct puncture for treating tumour
InactiveCN1676176AAvoid burnsImprove burnsMicrowave therapyAbnormal tissue growthElectrical conductor
The present invention relates to a microwave radiation antenna capable of making percutaneous puncture to cure tumor of several regions of human body. Said invention is formed from antenna connector, hard coaxial line, ceramic tube, water inlet tube, water outlet tube, temperature-measuring system, stainless steel sleeve and handle. Its output power can be up to above 100w, and is therapeutic effect is reliable and safe.
Owner:SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
Radio signal coverage system
InactiveCN101094032AImprove call qualitySo as not to damageRadio transmission for post communicationRadio relay systemsRadio coverageAmplifier
This system includes a repeater station (RS), a splitter / combiner (SC), a CATV passive distribution network (PDN) and an active relay (AR). Via CATV power divider, CATV main amplifier connects to one end of SC. RS receives the mobile communication signal (MCS) and transfers it to the other end of SC. SC mixes MCS with the CATV signal and transmits the mixed signal to AR through PDN. The mentioned AR includes a SC, a bidirectional amplifier and an antenna. One end of SC orderly connects to the bidirectional amplifier and the antenna. The beneficial effect of this invention is: it solves the problem that the coverage of mobile communication signal is poor inside buildings.
Owner:CHINA MOBILE GRP GUANGDONG CO LTD +1
High-power RF coupler
ActiveCN104378906ASolving Impedance Matching ProblemsGood strengthAcceleratorsHigher PowerTransmission line
The invention relates to the field of RF technologies particle accelerators, in particular to a high-power RF coupler. By the adoption of a bowl-shaped ceramic window structure and a reasonable production technology, the problem of impedance matching of coupler transmission lines is well solved. An inner conductor and an outer conductor are each of a cylindrical structure and are made of oxygen-free copper materials and provided with cooling channels. According to the outer conductor, circulating cooling is formed by a plurality of axial waterways; according to the inner conductor, a single cooling waterway is connected with a loop of the outer conductor in series. The bowl-shaped ceramic window is formed by welding transition metal flanges and ceramic based on a special welding technology, so that the atmosphere is isolated from a vacuum, insulation between the inner connector and the outer conductor is achieved, and a cooling loop is arranged in the direction of the inner diameter and the outer diameter of the ceramic window. The inner surface of the ceramic window is plated with a titanium nitride coating so that heat caused by secondary electron emission can be prevented. The bowl-shaped ceramic window structure is good in stress, and the impedance of the transmission lines does not have the abrupt change problem; according to the RF coupler, the impedance matching problem is well solved, the high-frequency power transmission efficiency is higher, generated heat is smaller, and the structure is more compact under the equal power level.
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
Gold wire bonding capacitance compensation in three-dimensional encapsulated circuit and design method of capacitance compensation
ActiveCN107068658AWidely applicable designCompact designSemiconductor/solid-state device detailsSolid-state devicesCapacitanceSurface layer
The invention discloses Gold wire bonding capacitance compensation in a three-dimensional encapsulated circuit. The invention involves a microwave multilayer circuit dielectric substrate. A capacitance compensation structure is arranged on a first layer transmission wire on the surface of the microwave multilayer circuit dielectric substrate. A capacitance compensation structure is arranged on a middle layer transmission wire in the vertical direction of the microwave multilayer circuit dielectric substrate. The transmission lines are in interconnection through gold wire bond wires. According to the invention, a problem of impedance matching of gold wire bonding in the three-dimensional encapsulated circuit is solved effectively. Space of the multilayer circuit is utilized fully for design of the capacitance compensation structure for parasitic inductance effect of gold wire bonding, especially the capacitance compensation structure added in the vertical direction. Compared with a prior art, area required for capacitance compensation merely on the surface layer transmission wire can be reduced. By adopting the structure provided by the invention, microwave transmission characteristics between transmission wires and chips and between transmission wires and transmission wires in a multi-chip circuit can be improved.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Ultra-wideband high-gain antenna based on radial disk impedance converter
ActiveCN105161854AImprove work performanceImprove efficiencyWaveguide hornsAntenna designUltra-wideband
The invention provides an ultra-wideband high-gain antenna based on a radial disk impedance converter. According to the ultra-wideband high-gain antenna, the radial disk technology is introduced into the ultra-wideband antenna design for the first time, the design of the radial disk impedance converter is added to a feeding position of the antenna, the ultra-wideband operation problem of different transmission line converters in a feeding system can be solved, and the effect that an antenna radiator can achieve effective conversion and directed radiation of electromagnetic energy under the condition of wideband feeding can be guaranteed. Meanwhile, a ridge waveguide structure with electric field and magnetic field centralizing effects is adopted, and two side surfaces of a ridge waveguide cavity used for energy exchange adopt a triangular ridge structure with an ultra-wideband property, thereby guaranteeing the effect that electromagnetic waves of different frequencies have well matched electromagnetic energy conversion cavities. The ultra-wideband high-gain antenna based on the radial disk impedance converter adopts the large-diameter gradually changing and ridge directional horn radiator design technologies, can achieve high gain and directed radiation of the antenna within ultra-wideband, and can control polarization characteristic and directional diagram sidelobes of the antenna.
Owner:陈玲
Floating coaxial connector
InactiveCN1417898ASolve Impedance MatchingIncorrect coupling preventionTwo-part coupling devicesElectrical conductorEngineering
Owner:张 祈福 +1
An antenna radiation unit and an electricity feeding method
ActiveCN103337712AHigh bandwidthReduce complexityAntenna supports/mountingsRadiating elements structural formsElectricityElectrical conductor
The invention relates to an antenna radiation unit. The antenna radiation unit comprises two dipole radiation units which are polarized and arranged in an orthogonal mode. Each dipole radiation unit is installed on a metal reflecting plate separately through a balun. Each balun comprises two support columns which are arranged to be parallel with and adjacent to each other. Each dipole radiation unit comprises two unit arms which are respectively installed on the two support columns in a corresponding mode. A coaxial cable which is arranged along the balun is arranged inside each dipole radiation unit. An outer conductor of each coaxial cable is connected with one of the unit arms or a corresponding support column. An internal conductor of each coaxial cable is connected with the other one unit arm or the corresponding support column. Each coaxial cable is provided with one or a plurality of outer conductor resection areas. The antenna radiation unit provided by the invention is simple in structure, and is easy to install. The antenna radiation unit provides convenience for electricity feeding. The antenna radiation unit provided by the invention is also good in consistency and easy to produce. Furthermore, the impedance match problem of the broadband antenna unit is solved and the optimization of electrical performance of antennas is realized.
Owner:GUANGDONG BROADRADIO COMM TECH
Wideband microstrip isolator
InactiveCN101552366ABroadbandBest parameter combinationWaveguide type devicesFerrite substrateMicrowave
The invention relates to a wideband microstrip isolator, which comprehensively considers the effects of electromagnetic parameters of a ferrite substrate, central working frequency and a bias field, and provides a best parameter combination. The microstrip isolator effectively solves the resistance matching problem, has the advantages of small volume, light weight, capable of being plastered, etc., realizes the wideband of the microstrip isolator and can be widely applied to the field of microwave communication field.
Owner:江苏灿勤科技股份有限公司
Vertical input channel protector of oscilloscope
ActiveCN101592679ARange of influenceAffect front and backDigital variable displayElectrical measurement instrument detailsUltrasound attenuationImpedance matching
The invention relates to a vertical input channel protector of an oscilloscope, which comprises a direct current power supply module capable of providing a direct current power supply for the vertical input channel protector of the oscilloscope, an amplifying circuit, a fixed attenuator, a protective tube, an impedance matching network and a bias regulating circuit. The invention aims to provide the vertical input channel protector of the oscilloscope, which can set a protection threshold according to actual needs, does not change the characteristic impedance of the original circuit, does not generate distortions to input signals, and solves the technical problems that a vertical input channel protection circuit of the prior oscilloscope has high protection threshold, changes the characteristic impedance of the original circuit and generates distortions to the input signals. The vertical input channel protector of the oscilloscope generates no influence on the amplitudes of tested signals and front and back edges, and also solves the problems of impedance matching and signal attenuation when the input signals are small and the protector generates no protective effects.
Owner:NORTHWEST INST OF NUCLEAR TECH
Jet 3D printing functional gradient electromagnetic protective material and preparation method thereof
ActiveCN110395967AGood adhesionSimple processAdditive manufacturing apparatusCeramic shaping apparatusMagnesium orthophosphateMetakaolin
The invention relates to a jet 3D printing functional gradient electromagnetic protective material and a preparation method thereof. The material comprises an impedance gradient absorbing layer and amatching layer, the matching layer is close to the air, the impedance of the matching layer is close to that of a free space, the matching layer and the absorbing layer jointly form a wave absorbing layer, and a substrate of the wave absorbing layer is magnesium phosphate cement; and during jet 3D printing, in raw materials of the magnesium phosphate cement, potassium dihydrogen phosphate, borax,metakaolin and nano wave-absorbing particle ferroferric oxide form a group, magnesium oxide forms a group, an aqueous solution forms a group, porous ceramsite forms a group, the four groups of raw materials are placed in four stock bins correspondingly, a flow speed of the materials in each stock bin entering printing equipment is controlled, the mixing amount of all groups of the materials entering a stirring bin part of the printing equipment is changed, the impedance values of different printing layers are regulated and controlled, and the impedance values are set from near to far accordingto a distance approaching to a concrete substrate in the wave absorbing layer and gradually increased in an arithmetic progression mode. The material provided by the invention has god structural bonding performance, obviously-improved electromagnetic protection effects and durability, and low costs.
Owner:HEBEI UNIV OF TECH
Broadband millimeter wave hybrid waveguide magic T power divider/synthesizer
ActiveCN113161709AImprove isolationSmall sizeHigh level techniquesCoupling devicesDielectric substrateRadio frequency signal
The invention discloses a broadband millimeter wave hybrid waveguide magic T power divider / synthesizer, and relates to the technical field of millimeter wave communication equipment and radio amplifiers. According to the technical scheme, wedge-shaped fin lines connected through a thin-film resistor and a trapezoidal cup base probe located in an inverted-Y-shaped opening seam in a dielectric substrate are embedded in a rectangular cavity of an isolation waveguide, the thin-film resistor is etched on the dielectric substrate through a thin-film technology, and the trapezoidal cup base probe is located in a slot between the two symmetrical waveguide matching column step bodies, and is integrally matched and integrated into a magic T isolation branch; and a radio frequency signal is input into a standard rectangular main waveguide through an input standard rectangular waveguide port, is divided into a left signal and a right signal through a matching structure formed by the trapezoidal cup base probe fixed between the two matching steps, enters the height reduction rectangular branch waveguide, and outputs the radio frequency signal through an output standard rectangular waveguide port.
Owner:10TH RES INST OF CETC
Automatic tuning type downhole wireless signal transmission system
ActiveCN111456724ASmall attenuationHigh signal to noiseConstructionsMultiple resonant circuits tuned to same frequencyWell loggingControl engineering
The invention discloses an automatic tuning type downhole wireless signal transmission system, which comprises a downhole sending module and a well mouth antenna, wherein the downhole sending module is independently connected with a drilling tool and a logging-while-drilling tool in an oil pipe; the logging-while-drilling tool is placed on the drill bit of the drilling tool; the drilling tool comprises an insulated pup joint, wherein the insulated pup joint is laterally placed below a drilling tool motor and is positioned between the drill pipe and the drill collar of the drilling tool for realizing the electric isolation of the drill pipe and the drill collar; the positive pole of the downhole sending module is connected with one end, which is near the drill pipe, of the insulated pup joint; the negative pole of the downhole sending module is connected with one end, which is near the drill collar, of the insulated pup joint; the well mouth antenna is placed on a well mouth, one end isconnected with the oil pipe, and the other end is subjected to ground connection; the downhole sending module is adopted to receive logging-while-drilling data measured by the logging-while-drillingtool, a direct-driven way is adopted to convert the obtained logging-while-drilling data into an electric signal, and the electric signal is transmitted to the well mouth antenna through the oil pipeafter the electric signal is subjected to automatic tuning amplification. The automatic tuning type downhole wireless signal transmission system carries out transmission through the direct-driven way,and transmission efficiency is high.
Owner:HUAZHONG UNIV OF SCI & TECH
Foldable large-spacing ultra-wideband low-profile tight coupling array antenna
PendingCN114267942AImplement collapsible functionalitySave plane spaceRadiating elements structural formsIndividually energised antenna arraysUltra-widebandEngineering
The invention relates to a foldable large-spacing ultra-wideband low-profile tight coupling array antenna, which is characterized in that the array plane is foldable, the unit spacing is large, the profile height is low, and the ultra-wideband wide-angle scanning electrical performance can be realized. As a tight coupling antenna array, tight coupling between the units is realized by thickening the tail end parts of the dipole arms, and the shift-out of resonance in a working frequency band is also realized by designing the biased grounding fork (3). The adjacent units are mutually independent and have no staggered structure, so that the array surface has a foldable function. The foldable large-spacing ultra-wideband low-profile tight coupling array antenna works at a large unit spacing, has dual-polarization ultra-wideband wide-angle scanning performance, is extremely low in profile height, and has an array plane folding function.
Owner:CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
Self-generating power supply for power circuit breaker
ActiveCN1547230ASolve Impedance MatchingEasy to completeProtective switch operating/release mechanismsCapacitanceInductor
The invention provides a kind of autogeny power for a control device. The power can be constructed under to small inductive current, thus the range of the breaker can be enlarged, thus it can work normally even with current which is 50%, even 16% of the normal current. The power includes several current mutual-inductors, switch power, energy-saving capacitance, there adds a first-grade resistance converter between the input end of the switch power and the energy-saving capacitance, it reduces the output resistance of the current mutual-conductor, and thus the inductive current can be outputted fully. The output resistance of the converter is high; it can supply power to the switch and the energy-saving capacitance.
Owner:SEARI ELECTRIC TECH
Electromagnetic anti-wax device
InactiveCN103628840AImprove liquidityExtend wax removal cycleInsulationElectric variable regulationMaterial resourcesEngineering
During crude oil exploitation and gathering and transportation, wax precipitation prevention or wax removal of an oil flowing channel is necessary for normal production of an oil field. At present, methods for removing wax mainly comprise the heating wax removing method, the mechanical wax removing method, the chemical agent wax removing method, the hot water and light oil pipeline washing method and the like, all the methods are great in limitation, a large number of manpower and material resources are needed, cost is high, the labor intensity is high, a large amount of energy is consumed, and the effective period is short. A novel electromagnetic anti-wax device is based on the electromagnetic anti-wax technique and is mainly composed of a main machine and an auxiliary machine, wherein a controller is arranged in the main machine, a pulse signal with a frequency changing continuously within a certain scanning cycle can be generated, the amplified pulse signal is transmitted to the auxiliary machine through bridge type power amplification and a transmission cable, the current of a load coil is kept unchanged through feedback control, the auxiliary machine is installed on an oil delivery pipeline, and oil is magnetized by flowing through the auxiliary machine. The electromagnetic anti-wax device is good in anti-wax effect, adaptable to various oil fields and oil qualities and low in energy consumption, and energy is saved and the environment is protected due to the adoption of a purely physical method.
Owner:YINCHUAN GUANGYIDA ENERGY SAVING TECH
Ultra-compact metamaterial wave-absorbing unit
InactiveCN103746191ASmall sizeReduce thicknessMagnetic/electric field screeningAntennasMetal foilMetallurgy
The invention discloses an ultra-compact metamaterial wave-absorbing unit, which comprises a first metal film, a rectangular medium layer is arranged on the rectangular first metal film, a second metal film is arranged on the rectangular medium layer, the first metal film is provided with a hollow, the hollow consists of a first C-shaped hollow and a second C-shaped hollow, moreover, the first C-shaped hollow and the second C-shaped hollow are arranged back to back, the second metal film consists of a first C-shaped metal foil and a second C-shaped metal foil, furthermore, the first C-shaped metal foil and the second C-shaped metal foil are arranged back to back, and the hollow is shaped like the second metal film. The ultra-compact metamaterial wave-absorbing unit has the advantages that: the ultra-compact metamaterial wave-absorbing unit is extremely thin, and the wave-absorbing property exceeds more than negative 15dB.
Owner:CETC YANGZHOU BAOJUN ELECTRONICS +1
Fan variable-pitch sliding ring
PendingCN108377070AExtend your lifeImprove reliabilityAssociation with control/drive circuitsWind motor controlTransmitted powerEngineering
The invention discloses a fan variable-pitch sliding ring. The fan variable-pitch sliding ring comprises a stator connected with a variable-pitch control cabinet of a fan, and a rotor connected with avariable-pitch device of the fan and matched with the stator, wherein the rotor comprises a power slideway unit for transmitting power and a noncontact transmission slideway unit for transmitting a signal. By adopting the independent noncontact transmission slideway unit, the problems that the service life is short, the impedance matching is influenced, the signal is attenuated, and the signal isreflected can be solved.
Owner:SUZHOU ENBIJI PRECISION ELECTRIC CO LTD
Encapsulating substrate structure provided with coupling circuit
InactiveCN103050474ASolve Impedance MatchingExcellent electrical propertiesPrinted circuit detailsSemiconductor/solid-state device detailsCouplingImpedance matching
The invention discloses an encapsulating substrate structure provided with a coupling circuit. The encapsulating substrate structure comprises a dielectric layer, a plurality of upper layer circuit units, a plurality of lower layer circuit units and a plurality of current conducting holes, wherein the upper layer circuit units are arranged on the upper surface of the dielectric layer, and are arranged in sequence at certain intervals; the same-layer coupling segment of each upper layer circuit unit and the same-layer coupling segment of another upper layer circuit unit are adjacent to each other, and are arranged in parallel with one another; the lower layer circuit units are arranged on the lower surface of the dielectric layer, and are arranged in sequence at certain intervals; and a hybrid differential motion design is realized by coupling two differential circuits on the same layer and coupling two differential circuits in adjacent layers without adjusting impedance matching, so that a high electric characteristic can be kept.
Owner:ADVANCED SEMICON ENG INC
Impedance matching adjusting method and impedance matching circuit
ActiveCN114448387AReduce volumeImplement variableImpedence matching networksCapacitanceInput impedance
The invention provides a method for adjusting impedance matching and an impedance matching circuit. The method comprises the following steps: acquiring load impedance and source impedance of the impedance matching circuit; calculating input impedance according to the load impedance; if the absolute value of a first difference value between the resistance value of the input impedance and the resistance value of the source impedance exceeds a first preset value, and / or the absolute value of a second difference value between the reactance value of the input impedance and the reactance value of the source impedance exceeds a second preset value, outputting an adjusting signal to adjust the number of accessed capacitors and inductors in the impedance matching circuit, the absolute value of the first difference value does not exceed the first preset value, and the absolute value of the second difference value does not exceed the second preset value. According to the impedance matching method and device, the number of the capacitors and the number of the inductors needing to be connected are obtained through calculation, the actual connection of the inductors and the capacitors in the impedance matching network is changed according to the number, impedance matching is achieved, the capacitors and the inductors can be rapidly and accurately changed by changing the connection number of the capacitors and the inductors, and the impedance matching problem is solved.
Owner:深圳市恒运昌真空技术有限公司
An antenna radiation unit and its feeding method
ActiveCN103337712BHigh bandwidthReduce complexityAntenna supports/mountingsRadiating elements structural formsElectricityElectrical conductor
Owner:GUANGDONG BROADRADIO COMM TECH
Preparation method and structure of series superconducting quantum interference device array based on superconducting bridge junction
PendingCN111864048AHigh junction current densityReduce parasitic capacitanceSuperconductor detailsNanotechnologyImpedance matchingOperating frequency
The invention provides a preparation method and structure of a series superconducting quantum interference device array based on a superconducting bridge junction. The series superconducting quantum interference device array structure based on the superconducting bridge junction has a nano-bridge structure, and a plurality of SQUID arrays connected in series are formed. Therefore, the structure has the characteristics of high junction current density and small parasitic capacitance. Through the series superconducting quantum interference device array structure with nanojunctions, the structurecan be reduced to the nanoscale, and the ability to resist external magnetic field interference is higher. Through the series SQUID array, the whole system of the series superconducting quantum interference device array structure based on the superconducting bridge junction has a larger bandwidth, the impedance matching problem is avoided, and the working frequency range is greatly increased. Therefore, the prepared series superconducting quantum interference device array structure based on the superconducting bridge junction has stronger anti-interference capability, higher bandwidth and better output signal-to-noise ratio.
Owner:NAT INST OF METROLOGY CHINA
Impedance matching device for signal processing circuit of photomultiplier
InactiveCN101702031ALower input impedanceReduce noiseX/gamma/cosmic radiation measurmentSignal processing circuitsPhotomultiplier
The invention discloses an impedance matching device for a signal processing circuit of a photomultiplier. The input end of the impedance matching device is connected with the output end of the photomultiplier, and the output end of the impedance matching device is connected with the input end of the signal processing circuit of the photomultiplier. The impedance matching device comprises a current amplifying part and a voltage amplifying part. The impedance matching device of the invention solves the problem of impedance matching between the photomultiplier and the signal processing circuit, thus the measuring signal has no distortion and no noise, and the accuracy of the measuring result is ensured.
Owner:泰州市华东分析仪器有限公司
LED driver for chopping light adjustment occasion
ActiveCN105451404AAvoid lossSolve Impedance MatchingElectric light circuit arrangementCircuit switchingControl unit
The embodiment of the invention discloses an LED driver for a chopping light adjustment occasion, and the driver comprises a rectification circuit and a DC-DC conversion circuit, wherein the rectification circuit and the DC-DC conversion circuit are sequentially connected between a phase angle light modulator and an LED load; and a current circuit which is in parallel connection with an output side of the rectification circuit, wherein the current circuit comprises an impedance circuit, an auxiliary source circuit, and a current circuit switching unit. A first end of the current circuit switching unit is connected with a first output end of the rectification circuit through the impedance circuit, a second end of the current circuit switching unit is connected with a second output end of the rectification circuit, and a third end of the current circuit switching unit is connected with the second output end of the rectification circuit through the auxiliary source circuit. The driver also comprises a DC-DC control unit which is connected with the auxiliary source circuit and the DC-DC conversion circuit; and a switching control unit which is connected with the current circuit switching unit and is used for controlling the connection from the first end of the current circuit switching unit to the second end or the third end according to a preset rule, so as to reduce the power loss of the driver.
Owner:INVENTRONICS HANGZHOU
Solar battery intermittent output method
InactiveCN104836513AImprove power generation efficiencySolve Impedance MatchingPV power plantsEnergy storageElectrical batteryEngineering
The invention provides a solar battery intermittent output method. The method comprises a step of providing a solar battery panel, and determining working voltage corresponding to the largest power point of the solar battery panel according to the working temperature of the solar battery panel; a step of providing an energy storage device, wherein an output end of the solar battery panel is connected with an input end of the energy storage device, and setting an upper voltage threshold and a lower voltage threshold according to the working voltage corresponding to the largest power point of the solar battery panel, wherein the working voltage corresponding to the largest power point of the solar battery panel is between the upper voltage threshold and the lower voltage threshold; and a step of providing a rear control device and a load, wherein an output end of the energy storage device is connected with the load and the rear control device is arranged between the energy storage device and the load, determining the relation among voltage of the energy storage device, the upper voltage threshold and the lower voltage threshold, and further determining connection and disconnection between the energy storage device and the load.
Owner:NINGBO GAOXIN JUGUANG SOLAR ENERGY
Miniature device, system and method for tracing source, preventing counterfeiting and preventing tampering
PendingCN112085138AImprove stabilityVersatilePackage recyclingBagsTamper resistanceHuman–machine interface
The invention provides a miniature device, system and method for tracing source, preventing counterfeiting and preventing tampering. The device is provided with a logic circuit for judging the protected packaging state process, and the packaging state process information cannot be changed once being recorded, so that after the miniature device is used for packaging various commodities, the packaging state process information cannot be changed. When a damaged package appears in the effective magnetic field range of the reader-writer, the reader-writer can receive an alarm signal, and screeningwork is completed. Once the damage time and state are recorded by the control module, the locking operation is carried out, so that the damage time and state cannot be changed secondarily, and a consumer can obtain the packaging state process and traceability information of the commodity through a human-computer interface. The invention has the characteristics of wide application range, high stability, comprehensive functions, reusability and the like, can accurately record commodity traceability information and package state process information, can be widely applied to the traceability, counterfeiting prevention, tamper prevention, package transfer prevention and other work in the transportation process of various commodities, and can perform investigation according to the accurate timeof behavior occurrence.
Owner:HEFEI UNIV OF TECH
Input impedance matching network and radio frequency front-end module
The invention discloses an input impedance matching network and a radio frequency front-end module. The input impedance matching network comprises a first bonding pad, a second bonding pad and a first inductor, one end of the first inductor is connected with the first bonding pad, the other end of the first inductor is connected with the second bonding pad, and the output end of the second bonding pad serves as the output end of the input impedance matching network and is configured to be connected with the input end of a low-noise amplifier; the input impedance matching network further comprises a compensation adjustment circuit connected with the first bonding pad and / or the second bonding pad, and the compensation adjustment circuit is configured to adjust the parasitic capacitance from the first bonding pad to the ground and / or the parasitic capacitance from the second bonding pad to the ground, so that the parasitic capacitance from the first bonding pad to the ground is larger than the parasitic capacitance from the second bonding pad to the ground. The compensation adjustment circuit can enable the parasitic capacitance from the first bonding pad to the ground to be larger than the parasitic capacitance from the second bonding pad to the ground, the problem of impedance mismatch caused by equal parasitic capacitance is solved, and impedance matching of the input end of the low-noise amplifier is achieved.
Owner:RADROCK (SHENZHEN) TECH CO LTD
Double contact mobile phone headphone socket
InactiveCN102291640ASolve Impedance MatchingSolving Offset Voltage IssuesEarpiece/earphone attachmentsForeign matterImpedance matching
The invention discloses a double-contact mobile phone earphone socket, which is installed in a mobile phone and is connected with the central processing unit (CPU) of the mobile phone through a mobile phone earphone detection circuit. A ground pin and a detection pin are arranged in the jack of the double-contact mobile phone earphone socket and are connected with the CPU of the mobile phone through the mobile phone earphone detection circuit. An earphone male connector in the invention is provided with a ground section, a microphone (MIC) section, a left sound channel section and a right sound channel section, wherein only the ground section can be used for realizing conduction. Compared with the prior art, by detecting the insertion of the male connector, a ground metal ring on an earphone can be connected with two detection pins and therefore the problems in impedance matching and bias voltage are solved; and moreover, by using the male connector to conduct the detection pins, the problem of dust and foreign matters is solved, and if the foreign matters are attached onto an elastic piece, through the action of inserting the male connector, the foreign matters can be rubbed off.
Owner:SHENZHEN GIONEE COMM EQUIP
A UWB High Gain Antenna Based on Radial Disk Impedance Transformer
ActiveCN105161854BImprove work performanceImprove efficiencyWaveguide hornsAntenna designUltra-wideband
Owner:陈玲
Capacitance compensation and design method of gold wire bonding in a three-dimensional package circuit
ActiveCN107068658BCompact designWidely applicable designSemiconductor/solid-state device detailsSolid-state devicesCapacitanceDielectric substrate
The invention discloses Gold wire bonding capacitance compensation in a three-dimensional encapsulated circuit. The invention involves a microwave multilayer circuit dielectric substrate. A capacitance compensation structure is arranged on a first layer transmission wire on the surface of the microwave multilayer circuit dielectric substrate. A capacitance compensation structure is arranged on a middle layer transmission wire in the vertical direction of the microwave multilayer circuit dielectric substrate. The transmission lines are in interconnection through gold wire bond wires. According to the invention, a problem of impedance matching of gold wire bonding in the three-dimensional encapsulated circuit is solved effectively. Space of the multilayer circuit is utilized fully for design of the capacitance compensation structure for parasitic inductance effect of gold wire bonding, especially the capacitance compensation structure added in the vertical direction. Compared with a prior art, area required for capacitance compensation merely on the surface layer transmission wire can be reduced. By adopting the structure provided by the invention, microwave transmission characteristics between transmission wires and chips and between transmission wires and transmission wires in a multi-chip circuit can be improved.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Driving device, method for eliminating single-ended signal reflection of panel, and display device
ActiveCN113506548BEliminate signal reflection problemsSolve Impedance MatchingStatic indicating devicesDisplay deviceEngineering
This application is applicable to the technical field of panel driving, and provides a driving device, a method for eliminating single-ended signal reflection of a panel, and a display device, wherein the driving device includes: a timing controller, a flash memory chip, and a timing controller and a display device. The signal transmission line between the above-mentioned flash memory chips, the signal rise time of the signal sent by the timing controller is shorter than the time required for the signal to pass through the signal transmission line, thereby eliminating the signal reflection problem during the signal transmission process, which can solve the problem that the flexible flat cable cannot be connected at the same time To meet the impedance matching problem of single-ended signal and differential signal.
Owner:HKC CORP LTD
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