56results about How to "Solve Impedance Matching" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.