50results about How to "Good standing wave performance" patented technology

The invention discloses a subminiature ultra-wide-band helical antenna which is applied to the technical field of communication. The subminiature ultra-wide-band helical antenna mainly comprises a radiator, a metal cavity, a feed Balun, a feed connector and wave absorbing materials. The radiator comprises plane helical lines, longitudinal helical lines and a medium support. The subminiature ultra-wide-band helical antenna enables the plane helical lines and the longitudinal helical lines to be combined together through the medium support which is sealed at one end and is the shape of a hollow cylinder, so that the band width of the antenna is increased, and meanwhile miniaturization of the antenna is realized. The longitudinal helical lines are connected with the antenna metal cavity through a resistor at the head ends of the longitudinal helical lines and a resistor at the tail ends of the longitudinal helical lines, so that low-frequency standing waves of the antenna and a directional diagram of the antenna are improved; the wave absorbing materials are arranged inside the metal cavity in a filling mode, so that the directional diagram, within the frequency band of the antenna and the circular polarization performance, within the frequency band, of the antenna are improved; due to the fact that an antenna cover is added, the use stability of the antenna is improved, and the service life of the antenna is prolonged. The subminiature ultra-wide-band helical antenna has the advantages of being ultra-wide in band, circularly polarized, wide in lobe, miniaturized and the like, and has broad application prospects.

The invention relates to a millimeter-wave single-chip integrated low-noise amplifier (LNA) which belongs to the electronic technical field and comprises two Runge bridges and a two-way (balanced-type) five-stage amplification structure connected between the Runge bridges in a circuit structure. The whole amplifier circuit is integrated on a single gallium arsenide chip or a silicon chip. The invention adopts a PHMET process, has excellent noise performance and adopts input conjugation match and noise match to simultaneously realize high gain and low noise. In a bias aspect, the invention removes a one-fourth wavelength line used in a traditional LNA for direct current bias to greatly reduce the chip area, adopts a self-supply bias mode to reduce the numbers of power supplies and devices, and adopts the two Runge bridges to form a balanced-type structure so as to improve the stability, the maximum output power, the standing wave performance and the noise performance of the LNA. The invention can be applied in a radar system, a communication system, and the like.

The invention relates to an L-band four-ridge ortho-mode transducer. The ortho-mode transducer is a modified index gradually-changing curve loaded with ridge diaphragms and a coaxial excitation structure, the operating frequency is 1-2GHz, and the ortho-mode transducer is applied to a radio telescope L-band receiver system. The ortho-mode transducer is composed of a circular waveguide, a four-ridge waveguide gradually-changing transformation segment, a four-ridge circular waveguide, ridge diaphragms, a short-circuit back cavity, a first coaxial probe and a second coaxial probe, and is characterized in that the diameter of the circular waveguide is designed according to the lowest operating frequency; the four-ridge waveguide gradually-changing transformation segment selects a modified index gradually-changing type impedance transformation mode so as to ensure transmission from a dominant mode of the four-ridge circular waveguide dominant mode to a dominant mode of the circular waveguide; chamfer modification is performed on the four-ridge cross section inside the four-ridge circular waveguide so as to ensure that a phenomenon of mutual interference between the ridge diaphragms does not occur; and a four-ridge waveguide coaxial transformer adopts a coaxial feed mode, and the short-circuit back cavity thereof selects a conical design. Measurement and simulation results of the ortho-mode transducer in reflection loss and isolation are basically identical, and radio astronomical observation requirements can be met.

The invention provides a terahertz frequency band local oscillation source based on a frequency multiplication link circuit integrated structure. The terahertz frequency band local oscillation source comprises an upper cavity body (1) and a lower cavity body (2); after the surface of the upper cavity body (1) is closely attached to the surface of the lower cavity body (2), an input port (22), a Y-shaped power divider (17), a first preceding-stage frequency doubler (19), a second preceding-stage frequency doubler (20), a Y-shaped combiner (18), a back-stage frequency doubler (21) and an output port (23) are formed. According to the local oscillation source, on the basis of a balanced type frequency doubler circuit, two stages of frequency doubling circuits are integrated into the same cavity body module, the structure is made to be compact, the defect of reflection caused by connection of port surfaces of different modules is overcome, frequency doubling performance is improved, thereby a W-waveband source is converted to the terahertz frequency band through frequency doubling, and larger output power is obtained.

The invention discloses a small-sized S/C dual-band planar/cone spiral composite antenna. The small-sized S/C dual-band planar/cone spiral composite antenna comprises a hollow cone-shaped dielectric holder, a feeding board, a cone spiral antenna, a planar spiral antenna, a metal seat, and a balun; the feeding board is arranged at the top of the dielectric holder; the cone spiral antenna is printedon a first substrate which is attached onto the conical surface of the dielectric holder; the planar spiral antenna is printed on a second substrate which is arranged on the base of the dielectric holder and is fixedly connected with the connection portion of the first substrate; the metal seat has a hollow cavity; an opening is formed at the top of the metal seat; the dielectric holder is fixedon the top of the metal seat; a through hole is formed at the bottom of the metal seat; one end of the balun passes through the bottom of the metal seat and the through hole at the top of the dielectric holder; and the metal shielding layer and inner conductor of the balun are respectively welded to two metallized through holes of the feeding board. According to the small-sized S/C dual-band planar/cone spiral composite antenna of the present invention, the planar spiral antenna and the cone spiral antenna are combined, and therefore, the composite antenna simultaneously satisfies performancerequirements of small size, high efficiency, high gain, circular polarization, and wide beam.

The invention discloses a full-wave band terahertz frequency tripling module. The full-wave band terahertz frequency tripling module comprises a metal upper base and a metal lower base, wherein input-end matched waveguides, chip channels and output-end matched waveguides of the same structures are arranged in cavities formed by the metal upper base and the metal lower base respectively; terahertz full-wave band frequency doubling chips are arranged in the chip channels; the terahertz full-wave band frequency doubling chips are bonded on the metal upper base; and the terahertz full-wave band frequency doubling chips are connected with the input-end matched waveguides and the output-end matched waveguides respectively. The full-wave band terahertz frequency tripling module is based on a terahertz integrated circuit micro-nano manufacturing technology, and has the characteristics of compact structure, easiness and convenience in installation, high integration degree, full-wave bandwidth, no need of extra bias, low cost, high consistence and convenience in large-scale manufacturing.

The invention discloses a microstrip phase shifter, and the phase shifter comprises: a first substrate which comprises a first surface and a second surface, wherein the first surface and the second surface are opposite to each other, the first surface is provided with a metal ground layer, and the second surface is provided with a first feed line and a second feed line, which are arranged in parallel; a mobile assembly which is movably arranged on the first substrate, wherein a mobile feeder line is arranged on the mobile assembly, the mobile feeder line comprises a first feed part, a second feed part and a connecting part connected with the first feed part and the second feed part, the first feed part is movably stacked on the first feeder line, and the second feed part is movably stackedon the second feed line; and a cover shell which is detachably arranged on the first substrate, wherein the moving assembly is arranged between the cover shell and the first substrate. The microstripphase shifter has the advantages of being small in size, light in weight and low in cost.

The invention proposes a Ka-waveband microstrip line gain equalizer, and aims to provide an equalizer which is compact in structure and can be used for achieving high equilibrium quantity and improving amplitude-frequency response of a transceiving front end. The Ka-waveband microstrip line gain equalizer is implemented according to the following scheme: two segments of 50-ohm microstrip lines (1) are connected respectively from horizontal ports of T-shaped joints at the two sides of an impedance matching microstrip line (2) to form a main transmission line and also serve as an input end and an output end of a microwave signal; two microwave resonant units axially symmetric to each other along a vertical central line comprise high-resistance microstrip lines (3), widened microstrip lines (4), thin-film resistors (6) and microstrip open-circuit branches (5) which are sequentially connected and are loaded at vertical ports of the T-shaped joint at the two sides of the impedance matching microstrip line (2), the high-resistance microstrip lines (3) downwards extend from the T-shaped joint and extend towards a horizontal outer side and also are bent to an S shape, and the microstrip open-circuit branches (5) are bent towards a horizontal inner side to a U shape. By the Ka-waveband microstrip line gain equalizer, the problems of large area, difficulty in integration, low reliability, small single-stage equilibrium quantity and the like of the prior art are solved.

A suspended strip line ultra-wideband zero-point-adjustable band-pass filter disclosed by the invention is small in area, high in integration level and excellent in standing wave performance. According to the technical scheme, at least two resonators and a double-layer metallization coupling via hole which are arranged between double rows of metallization coupling via holes are distributed on the front face and the back face of a dielectric substrate, and each resonator is jointly composed of a main resonator located on one side and a resonator loading capacitor located on the other side; the resonator loading capacitors of all the resonators are connected with the metal ground at the two sides of the dielectric substrate; and transmission lines at the two ends achieve connection of the upper layer and the lower layer through a metalized through hole, and the self-resonant frequency of each resonator can be adjusted by adjusting the size of the resonator loading capacitor on the back face of the dielectric substrate of the resonator. The size of the capacitance loading part is increased, so that the self-resonant frequency of the resonators shifts towards the low-end direction of the frequency, the capacitance loading size of the back surface of the resonators is reduced, the self-resonant frequency of the resonators shifts towards the high-end direction of the frequency.

The invention discloses a high-power microwave load, which comprises a body, a wedge plug, absorption sheets, water inlet pipes and water outlet pipes. The body is a cuboid with a waveguide cavity. One side wall of the body is provided with a plurality of V-shaped grooves arranged side by side in the length direction of the cuboid; and one side wall of the body is provided with a plurality of first water passing holes in the width direction of the cuboid. The wedge plug comprises a side plate corresponding to the end surface of the body and a plurality of wedge-shaped parts. One end of each ofthe plurality of wedge-shaped parts is connected to the side plate, and is matched with and corresponding to each of the plurality of V-shaped grooves. The side surface of each wedge-shaped part is provided with a plurality of second water passing holes. The absorption sheets comprise a first absorption sheet and a second absorption sheet, which are fixed to the inner surfaces of the waveguide cavity respectively, and a third absorption sheet and a fourth absorption sheet, which are fixed to the surfaces at the two sides of the plurality of wedge-shaped parts. The water inlet pipes and the water outlet pipes are fixedly arranged at the two sides of the body and the wedge-shaped parts respectively and are communicated with the two ends of the first water passing holes and the second waterpassing holes correspondingly.

The invention discloses an ultra-wideband one-to-four power divider. Three one-to-two power dividers are connected together in a cascading manner, and meanwhile, a circuit form of a multilayer board is adopted, so that the design of a circuit structure is optimized, and the microwave performance and the producibility of the power divider are improved. The working frequency of the power divider designed by the invention is 6-18GHz. It can be known through simulation software verification that the return loss is superior to -13dBm, the insertion loss is superior to -7dBm, and the isolation degree is superior to -12dBm. A processing object verification result shows that a theoretical simulation result is basically consistent with an experimental test, and the feasibility of the design methodis proved.

The invention relates to the technical field of cable assemblies, in particular to a structure of a bent connector and a processing method thereof. The structure includes a cable with an elbow, a shell of a connector, and a bushing for connecting the cable with the shell, wherein one end of the cable elbow comprises a cable outer conductor and a cable inner conductor, and the cable inner conductoris located at the end part of the cable; the cable outer conductor is arranged in the bushing and welded with the bushing, and the cable inner conductor extends out of the bushing. A fixing cavity matched with the lining is formed in the shell, a connector inner conductor is arranged in the fixing cavity, and the lining is inserted into the fixing cavity so that the cable inner conductor can be electrically connected with the connector inner conductor. The bushing is welded with the cable, so that the welding time and the welding temperature during the welding of the outer conductor of the cable are reduced, the influence of welding heat on the heating expansion of the insulating layer of the cable is reduced, the influence of welding on the electrical property of the cable is reduced, and the overall performance of a finished product is improved.

The invention discloses a double-probe waveguide. The double-probe waveguide comprises a hollow rectangular waveguide; the middle of the upper surface of the rectangular waveguide protrudes to form an upper cavity; the middle of the lower surface of the rectangular waveguide is concaved on the bilateral sides of the rectangular waveguide to form two symmetrical lower cavities respectively; the upper cavity and the lower cavities are communicated together to form a waveguide cavity; the edge portions of the upper surfaces of the two lower cavities protrude to form symmetrical projections respectively; the height of the projections is smaller than that of the upper cavity; a groove is formed between each projection and the upper cavity; the upper cavity comprises an input end; the two symmetrical lower cavities comprise an output end respectively; each output end is provided with a quartz probe. The double-probe waveguide is matched with an input port of a T/R module, meanwhile the waveguide microstrip transition and power allocation functions can be achieved, and accordingly the insertion loss is small in comparison with independent use of power division and probe transition, the size can be furthest saved, and the power division ratio and the standing wave performance are good.

The invention discloses a miniaturized micro-strip equalizer based on a thin film circuit, which comprises an input transmission line, an output transmission line, a matched transmission line, a first resonance unit, a second resonance unit and a dielectric substrate. The input transmission line and the output transmission line are respectively and horizontally connected with two ports of the matched transmission line to form a main transmission line; as input and output ends of microwave signals, the matched transmission line is bent into an S shape; the first resonance unit and the second resonance unit are composed of thin-film resistors and microstrip open-circuit resonance branches and loaded on the two sides of the matched transmission line, and the microstrip open-circuit resonance branches are bent to be S-shaped. The thin film circuit technology insensitive to temperature change is adopted, the problem that an equalizer cannot work normally after high and low temperature storage and high and low temperature circulation due to a dielectric material and an absorption resistor is solved, and the problems that in the prior art, the size is large, the structure is complex, the reliability is low, and the equalization amount is small are solved.

A frequency selection microstrip splitter disclosed by the invention is high in isolation degree, small in signal energy loss and easy to debug. According to the technical scheme, a first impedance conversion line and a second impedance conversion line are connected below a first branch microstrip line and a second branch microstrip line respectively, one ends of the first impedance conversion line and the second impedance conversion line are suspended, and the length of the first impedance conversion line and the length of the second impedance conversion line are 0.25 lambda 1, so that an equivalent circuit of the frequency selection microstrip splitter is formed; n paths of radio frequency transmission frequency signals fn of which the corresponding medium wavelengths lambda are lambda n respectively enter a main path microstrip line from an input port, and then sequentially reach a main path output port, a first branch output port and a second branch output port; a set radio frequency signal is output to a terminal load device R1 through the equivalent circuit main path output port, a modulated control signal is output to a terminal device load R2 through the first branch output port, and a direct current signal is output to a terminal load device R3 through the second branch input port.

According to a dual-polarized antenna module, radiation units and a substrate for bearing the radiation units are both made of dielectric materials, the bearing dielectric substrate and the radiationunits are integrally formed, and the plurality of radiation units can be formed on one dielectric substrate together, so the processing cost is effectively reduced; the top surface of each radiation unit is provided with a radiation sheet by selective electroplating and LDS processing, so that the guide sheet of each single radiation unit is omitted, and consumables are reduced; moreover, the feeder line of a positive 45-DEG direct connection feed structure and the feeder line of a negative 45-DEG direct connection feed structure are respectively arranged on the inner side and the outer side of the side wall of a cavity, so that channel pollution can be effectively prevented;and according to the dual-polarized antenna module, a second branch part is arranged on the first branch part of a dielectric adding convex block, and the corresponding position relation with the radiation sheets is adjusted to achieve a better standing wave effect.

The present invention discloses a high-isolation ultrashort-wave three-band integrated antenna structure which comprises a whip antenna body. The whip antenna body comprises: a lower radiating body, alower whip body and an upper whip body which are connected successively, wherein cross sections of the lower radiating body, the lower whip body and the upper whip body have circular structures; anda first electromagnetic wave transmitting body, a second electromagnetic wave transmitting body and a third electromagnetic wave transmitting body, wherein the first electromagnetic wave transmittingbody, the second electromagnetic wave transmitting body and the third electromagnetic wave transmitting body are positioned inside the lower radiating body. The structure provided by the present application integrates the communication of three bands, i.e., 27.5 MHz-39.5 MHz, 150 MHz-170 MHz, and 350 MHz-370 MHz, provides wide and unobstructed view, does not affect the observation of other devicesand persons for marine targets, and has obvious advantage of minimal view obstruction. An antenna radiating apparatus composed of a plurality of combined sheet radiating bodies is adopted inside theantenna body, thereby ensuring perfect transmission of frequencies of three bands on the same antenna and excellent standing wave performance.

The invention relates to a V-waveband and high-power frequency hopping colocation filter. The V-waveband and high-power frequency hopping colocation filter comprises a logic control unit 1, a switch drive unit 2 and a comprehensive radio frequency turning unit 3 which are combined to form a whole, wherein a memory module U1 and an external debugging data interface J2 of the logic control unit 1 can output control signals to ten ways of drive circuits of the switch drive unit 2 through an electronic switch module; the comprehensive radio frequency tuning unit 3 comprises ten ways of resonant circuits, and each way adopts a parallel resonance circuit and performs inductive coupling on an air core inductance cross coupling structure through an earth shaft, so that different sub-filters have the same relative bandwidth; and values of different capacitors in each way of parallel resonance circuit correspond to different sub-filter center frequency, and the number of sub-filters is 210. The V-waveband and high-power frequency hopping colocation filter has the advantages of high frequency hopping speed, small insertion loss, good standing wave performance, capacity of being used in a 100 W high-power occasion and the like.

The invention discloses a microwave load, which comprises a body, a wedge plug, absorption sheets, a water inlet pipe and a water outlet pipe. The body is a cuboid having a waveguide cavity. The sidewall of the body is provided with a V-shaped groove in the length direction of the cuboid; and the side wall of the body is provided with a plurality of first water passing holes in the width direction of the cuboid. The wedge plug comprises a side plate corresponding to the end surface of the body and a wedge portion, one end of which is connected with the side plate and which is corresponding tothe V-shaped groove. The wedge portion is provided with a plurality of second water passing holes. The absorption sheets comprise a first absorption sheet and a second absorption sheet connected withthe inner side surface of the waveguide cavity, and a third absorption sheet and a fourth absorption sheet connected with the two side surfaces of the wedge portion. The water inlet pipe and the water outlet pipe are communicated with the two ends of each of the first water passing holes and the two ends of each of the second water passing holes. The absorption sheets are placed on the surface ofthe wedge portion, so that absorption area is increased by times, and the absorption sheets are allowed to quickly transfer the absorbed microwave heat to the cooling water in the second water passing holes.