Patents
Literature
50results about How to "Beam width" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Multimodal satellite navigation terminal antennae with wide-band circular polarized wide wave beam
ActiveCN101286592AIncrease inductanceSmall sizeElongated active element feedPolarised antenna unit combinationsWide beamAntenna feed
Owner:SPACE STAR TECH CO LTD
Beam monitor system and particle beam irradiation system
ActiveUS20130231517A1Simple configurationShort timeMaterial analysis by optical meansPhotometry using electric radiation detectorsParticle beamLight beam
Disclosed is a beam monitor system in which signals outputted from a plurality of wires are divided in a multi-wire type monitor for measuring a beam profile of a charged particle beam, an identical number of the wires are grouped, the signals of the respective groups are taken out one piece by one piece to be connected with each other, and the number of the pieces, corresponding to a number of the wires belonging to the one group, are put together to be connected to a signal processor storing connection information.
Owner:HITACHI LTD
Wideband low sidelobe lens antenna based on novel artificial electromagnetic material
ActiveCN103337710AGood dispersionImprove performanceRadiating elements structural formsRefractive indexImpedance matching
The invention discloses a wideband low sidelobe lens antenna based on novel artificial electromagnetic material. The antenna comprises a lens body with an axis in a same straight line, an impedance matching layer, and a feed source. A refractive index of the lens body shows gradient distribution along a radial direction, and a refractive index of the impedance matching layer shows uniform distribution along s axial direction. The lens body and the impedance matching layer are made from the novel artificial electromagnetic material. The new artificial electromagnetic material consists of basic units of periodic arrangements. In the invention, the wideband low sidelobe lens antenna based on the novel artificial electromagnetic material realizes, for a first time, simultaneously regulating an aperture field amplitude and phase distribution in a microwave band; a bandwidth of the lens antenna is quite wide; dispersion in a Ku band is not clear, and the performance is stable; the production is simple; the technology is mature; the price is not high; the promotion is easy; and structural parameters can be scaled to be suitable for different wave bands such as the microwave, millimeter wave and terahertz wave.
Owner:SOUTHEAST UNIV
Space multi-target detection system and method
ActiveCN108226888AHigh equivalent antenna gainBeam widthWave based measurement systemsOrbital mechanicsTime delays
The invention relates to a space multi-target detection system and method. The method comprises the following steps: performing cross-correlation calculation on each of a plurality of receiving antenna signals; obtaining a brightness distribution function according to a cross-correlation calculation result and realizing comprehensive aperture mapping of an observed area; realizing the suppressionof cosmic background noise in the comprehensive aperture mapping by utilizing observed data or prediction calculation; correcting image blur caused by spatial target motion in the comprehensive aperture mapping according to the observed data or an orbital mechanics model; realizing the recognition and the direction estimation of multiple targets in the comprehensive aperture mapping through threshold value judgment; realizing calculation on time delay and phase difference of each of antennas relative to a phase center aiming at selected target direction and performing time delay and phase adjustment; realizing the alignment of each of the antenna signals in the selected target direction according to time delay and phase difference calculation values; performing co-directional addition on signal values of all the receiving antennas and realizing the observation of a signal source in the selected target direction.
Owner:NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
Wideband wide-beam circularly polarized dielectric resonator antenna fed by spiral slit
InactiveCN105261825ARealize broadband circular polarization functionBeam widthRadiating elements structural formsResonant antennasDielectric resonator antennaWide beam
The invention relates to a wideband wide-beam circularly polarized dielectric resonator antenna fed by a spiral slit, and belongs to the technical field of electronics. The antenna comprises a rectangular dielectric substrate, a metal floor, a chip resistor, a rectangular dielectric resonator and a coaxial line, wherein the front surface of the dielectric substrate is covered by the metal floor; slits are etched in the metal floor; and the coaxial line is arranged on the back surface of the substrate for feeding the antenna. The wideband wide-beam circularly polarized dielectric resonator antenna is fed by the coaxial line; the energy is transmitted to the place below the slit through the coaxial line, and then the energy is coupled to the rectangular dielectric resonator through an Archimedes spiral slit to excite dominant modes which are shown as the formula in the specification; and circularly polarized radiation is generated by the two orthogonal modes. The wideband wide-beam circularly polarized dielectric resonator antenna realizes the wideband circularly polarized function through single point feed on the basis of the simple dielectric resonator structure, and the antenna is wider in beams.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Large-beam diameter ion source and screen grid
The invention relates to a large-beam diameter ion source. The large-beam diameter ion source comprises a gas ionization device, an ion optical system and a neutralization device, wherein the gas ionization device is used for generating plasma, the ion optical system is used for extracting an ion beam from the plasma and accelerating the ion beam, the neutralization device is used for emitting electrons to the ion beam so as to generate a neutralization ion beam, the emission aperture of the large-beam diameter ion source is 100-200 millimeters, the ion optical system comprises a screen grid and an acceleration grid which are axially arranged on the same central line at intervals, a grid hole region with a grid hole is arranged at the middle part of the screen grid, and the aperture of the grid hole of the grid hole region is gradually increased towards the outside from a circle center of the grid hole region along a radial direction. In the large-beam diameter ion source, the screen grid with variable aperture is designed, so that the aperture of the screen grid is matched with plasma concentration distribution extracted by the screen grid, the same beam density is further extracted through different apertures to achieve the purpose of improving the beam uniformity, and the ion beam with wide beam and high directivity can be generated; and moreover, the effective beam diameter and the uniformity are large, and the beam stability is high.
Owner:北京埃德万斯离子束技术研究所股份有限公司
Satellite navigation circularly polarized microstrip antenna
InactiveCN105048074AHigh precisionImprove radiation efficiencyRadiating elements structural formsPower flowDielectric substrate
The invention provides a satellite navigation circularly polarized microstrip antenna. A triangular Y-shaped groove microstrip radiation unit is adopted, which has the characteristics of high radiation efficiency, high low-elevation gain, wide band, wide wave beam and minimization, and is particularly suitable for receiving low-elevation satellite signals and increasing the center accuracy of an antenna phase. The satellite navigation circularly polarized microstrip antenna comprises a metal radiant panel, a dielectric substrate and a metal reflection bottom plate, wherein the metal radiant panel and the metal reflection bottom plate are arranged on the upper surface and the lower surface of the dielectric substrate respectively; the metal radiant panel is triangular; the triangular radiant panel is provided with a Y-shaped groove; the Y-shaped groove comprises three strip-shaped open grooves; the starting ends of the three strip-shaped open grooves converge in an intersecting way, and the tail ends point to the three edges of a triangle respectively; the triangular radiant panel provided with the Y-shaped groove is used for controlling surface current flow, and radiating circularly polarized waves; and the edges of the strip-shaped open grooves of the Y-shaped groove are provided with coaxial feeding points for feeding electromagnetic wave signals.
Owner:OLINKSTAR CORP
Broadband and high low-elevation gain first-generation beidou satellite navigation transceiver antenna
ActiveCN105356045AReduce section heightImproving Impedance BandwidthRadiating elements structural formsAntennas earthing switches associationTransceiverEngineering
The invention relates to a broadband and high low-elevation gain first-generation beidou satellite navigation transceiver antenna, which comprises two layers of dielectric plates, two coupling round copper sheets and four grounding rectangular copper sheets, wherein an antenna radiation patch is arranged on the lower surface of the upper layer of dielectric plate; a grounding plate is arranged on the upper surface of the lower layer of dielectric plate; a feed network is arranged on the lower surface of the lower layer of dielectric plate; the upper layer of dielectric plate and the lower layer of dielectric plate are fixed through plastic screws; an air layer with a certain length is arranged between the upper layer of dielectric plate and the lower layer of dielectric plate; the coupling round copper sheets are arranged in the air layer and are parallel to the dielectric plates; a feed point is arranged at the circle center of each coupling round copper sheet; the feed points are connected with the feed network through feed probes; the four grounding rectangular copper sheets are respectively attached to the periphery of the antenna; and one side of each grounding rectangular copper sheet is connected with the grounding plate. The broadband and high low-elevation gain first-generation beidou satellite navigation transceiver antenna has the advantages of low profile, large bandwidth, wide wave beam and low cost on the basis of dual-frequency characteristics and can be well applied to beidou navigation terminal equipment.
Owner:FUZHOU FUDA BEIDOU COMM TECH CO LTD
Micro-strip low-axial-ratio circularly-polarized antenna for aerial radiation field measurement
ActiveCN107809000ASmall cross-couplingImprove circular polarization purityParticular array feeding systemsRadiating elements structural formsCoaxial probeMicrowave
The invention discloses a micro-strip low-axial-ratio circularly-polarized antenna for aerial radiation field measurement. The micro-strip low-axial-ratio circularly-polarized antenna comprises a medium substrate. A plurality of circular slot units in central symmetry are formed in the front surface of the medium substrate through etching. The center of each circular slot unit is provided with a unit center rectangular groove. One side of each unit center rectangular groove is provided with one feed probe welding hole, and the feed probe welding hole adopts coaxial probe backward feed. The plurality of circular slot units are arrayed in a sequential rotation mode. The back surface of the medium substrate is provided with a copper-clad floor. The copper-clad floor is provided with grooves in the places corresponding to the circular slot units respectively; and the feed probe welding holes are arranged in the grooves respectively. The micro-strip low-axial-ratio circularly-polarized antenna improves circular polarization purity, realizes low-axial-ratio characteristics and is suitable for accurate measurement of an aerial microwave radiation field.
Owner:中国人民解放军63660部队
Antenna system and base station
ActiveCN104577356ABeam widthSolve the problem of only providing narrow beamsParticular array feeding systemsIndividually energised antenna arraysFistWide beam
The embodiment of the present invention provides an antenna system and a base station. The antenna system of the present invention includes: a first antenna array for forming wide beam coverage and a second antenna array for forming narrow beam coverage; and the fist antenna array includes at least one row antenna, each row antenna provides at least a wide beam port, the second antenna array includes at least two rows antennas, and the second antenna array provides at least one narrow beam port. The embodiment of the present invention solves a problem that the small interval multi-row antennas can only provide narrow beam, and meets the requirement that the antenna system provides wide beam and narrow beam simultaneously.
Owner:HUAWEI TECH CO LTD
Beam monitor system and particle beam irradiation system
ActiveUS8674319B2Simple configurationShort timeThermometer detailsStability-of-path spectrometersParticle beamLight beam
Owner:HITACHI LTD
Broadband zero phase center high-precision antenna of butterfly oscillator structure
PendingCN109119753AHigh gainHigh beamRadiating elements structural formsAntennas earthing switches associationResonant cavityMultipath effect
The present invention provides a broadband zero phase center high-precision antenna of a butterfly oscillator structure. The broadband zero phase center high-precision antenna comprises an antenna main radiation unit, a resonant cavity, a feed structure and a parasitic radiation structure. The antenna main radiation unit comprises a square PCB, an oscillator structure, a main radiation unit grounding plate and a regulation branchknot; the regulation branchknot is connected with the oscillator structure; the oscillator structure comprises four hexagonal radiation paster oscillators with hollowstructures and with dimensions; the corner of each hexagonal radiation paster oscillator comprises one feed angle and one wing tip angle opposite to the feed angle; the feed angles of the oscillatorsare integrally arranged at the centers of the square PCB and are connected with the feed structure; the side boundary of the feed angles of the adjustable oscillators are close neighbor and in parallel to each other; the wing tip angles of the oscillators are respectively arranged at the four corners of the square PCB to allow the oscillator structure to be a butterfly wing shape; and the parasitic radiation structure is round the antenna main radiation unit, and the lower portion of the main radiation unit grounding plate is connected with the resonant cavity. The broadband zero phase centerhigh-precision antenna of a butterfly oscillator structure has a high gain, a wide beam and a wide band, and is stable in phase center and high in anti-multipath effect capacity.
Owner:国网思极位置服务有限公司 +1
Antenna case of air-hole structure
InactiveUS20150116157A1Low unit priceImprove productivityAntenna supports/mountingsEngineeringRadio wave
The antenna case with an air hole structure has excellent durability while lightweight and has improved electric characteristics of radio waves emitted from an antenna. The antenna case having the air hole structure includes a main body having a plurality of air holes and a pair of caps. The main body is formed into a tube shape to have the air hole structure, and both distal ends of the main body are opened. The pair of caps covers both opened portions of the main body, and includes an upper cap and a lower cap. The plurality of air holes formed in an internal portion of the main body reduce a weight of the main body, and improve electric characteristics of radio waves due to a dielectric constant of a resin. A conductor rod is inserted into the air holes, thereby improving a pattern of radio waves emitted from the antenna.
Owner:PARK JINYOUNG
Wide Bandwidth Beam Rectangular Monopole Antenna
InactiveCN104377428BSimple structureReduce volumeAntenna adaptation in movable bodiesRadiating elements structural formsRadiation lossElectrical conductor
The invention discloses a broadband wide-beam rectangular monopole antenna and relates to an onboard antenna with broadband wide-beam features. The monopole antenna comprises a rectangular pasting piece printed on a dielectric substrate, a coplanar waveguide and an edge gradual-change structure floor. Feeding is carried out in a coplanar waveguide mode. Radiation loss is lowered. The lower end of the rectangular conductor pasting piece is subjected to smoothing processing. Impedance matching is optimized. A groove is formed in the bottom of the pasting piece. The edge gradual-change structure floor is designed, and an antenna beam can be effectively widened. The antenna has the advantages of being small in size, simple in structure, convenient to machine, wide in beam, easy to integrate and the like, in a broadband, the width of the 1.5 dB beam of the antenna in a vertical face reaches 120 degrees, all-direction scanning is carried out in a horizontal plane, impedance bandwidth is 7.1 GHz-12.8 GHz, the maximum gain can reach 3.8 dB, the radiation features are stable, the requirement for the performance index of the onboard antenna is met, and the monopole antenna is suitable for being used as a conformal unit of the onboard antenna.
Owner:JINLIN MEDICAL COLLEGE
Circularly polarized antenna
InactiveCN110752443AWide beamwidthGood isolation between unitsRadiating elements structural formsAntennas earthing switches associationCircularly polarized antennaScrew joint
The invention discloses a circularly polarized antenna. The circularly polarized antenna comprises a metal connecting column, a radiation patch, a medium connecting column, a circular metal cavity anda base, wherein the circular metal cavity is formed in the base; the metal connecting column, the radiation patch and the medium connecting column are positioned on the base and in the circular metalcavity; the radiation patch and the medium connecting column are fixed through the metal connecting column in a screw joint manner; and the bottom of the medium connecting column is fixed with the base in a screw joint manner. The circularly polarized antenna has the advantages of low loss, high radiation resistance, low processing cost and convenience in mounting.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Ka-waveband dual-circular polarization switchable transceiving antenna
ActiveCN112332085AFirmly connectedHigh bandwidthRadiating elements structural formsAntenna earthingsWide beamEngineering
The invention discloses a ka-waveband dual-circular polarization switchable transceiving antenna which comprises an antenna radiation patch layer, an antenna feed layer, a TR assembly layer and probes. The antenna radiation patch layer comprises an antenna radiation patch dielectric layer, a slave radiation patch is arranged on the upper surface of the antenna radiation patch dielectric layer, a radiation metal ground layer is arranged on the lower surface of the antenna radiation patch dielectric layer, a main radiation patch is clamped in the middle of the antenna radiation patch dielectriclayer, and a coupling gap is formed in the radiation metal ground layer; the antenna feed layer comprises an antenna feed dielectric layer arranged under the radiation metal ground layer, a feed metalground layer is arranged on the lower surface of the antenna feed dielectric layer, and two T-shaped strip line feed structures are arranged in the antenna feed dielectric layer; the TR assembly layer comprises other radio frequency layers, a switching layer and a bottom microstrip layer. The probes comprise a first probe and a second probe. The phased array multilayer microwave plate dual circularly polarized antenna is formed by arranging the antenna radiation patch layer, the antenna feed layer and the TR assembly layer, and has the characteristics of broadband and wide beam.
Owner:重庆两江卫星移动通信有限公司
Multi-channel pulse Doppler radar capable of cross-medium detection of underwater sound source
PendingCN113917456AImprove discovery rateIncrease spacingWater resource assessmentRadio wave reradiation/reflectionSound sourcesSea waves
The invention discloses a multi-channel pulse Doppler radar capable of detecting an underwater sound source in a cross-medium manner, which relates to the field of radar detection. The radar comprises a multi-beam parabolic cylinder antenna module, a transceiving module, a signal processing module and a data processing module; wherein the receiving and transmitting module is used for receiving a target echo signal or transmitting a transmitting signal to a parabolic cylinder reflector of the multi-beam parabolic cylinder antenna module; the data processing module is used for completing radar control, data communication and echo display; and the signal processing module is used for processing different radial speeds of sea wave clutters and water surface micro-motion signals relative to the radar detection direction. The method comprises the following steps: extracting a signal of which the Doppler frequency is not zero from a target echo signal, namely a water surface micro-motion signal, so as to effectively distinguish sea wave clutters and target echoes; therefore, a technical foundation is laid for cross-medium detection of underwater sound sources by adopting water surface and air radars, so that cross-medium communication becomes possible.
Owner:中船海洋探测技术研究院有限公司 +2
Lighting device and projection device
The invention provides a lighting device and a projection device. The lighting device is composed of a light source, a light homogenizer, an illumination lens, a polarizing beam-splitter (PBS), and asilicon-based liquid crystal LCoS. The light homogenizer is arranged between the light source and the illumination lens. With the light homogenizer, large-angle-range illumination light is provided for each pixel on LCos, so that the light beam projected by the projection eye lens is widened and thus the pupil of the human eye is covered by the full field of view.
Owner:JOURNEY TECH LTD
Satellite-navigation anti-interference microstrip array antenna
InactiveCN105186119AMiniaturizationSolve mutual couplingAntenna arraysRadiating elements structural formsMicrostrip array antennaPower flow
A satellite-navigation anti-interference microstrip array antenna provided in the invention adopts triangular Y-shaped slot microstrip array elements. By using the antenna, miniaturization of the antenna array can be realized, cross coupling among array elements is effectively overcome and an anti-interference capability is increased. The antenna comprises N microstrip antenna array elements, a medium substrate and a metal reflection base plate. The microstrip antenna array elements are arranged on an upper surface of the medium substrate according to a certain interval. The metal reflection base plate is arranged on a lower surface of the medium substrate. Each microstrip antenna array element comprises a triangle metal radiant panel. The triangle metal radiant panel is provided with a Y-shaped slot. The Y-shaped slot comprises three bar-type slotting. Initiating terminals of the three bar-type slotting are intersected and converged and tail terminals are pointed to three edges of a triangle respectively. The triangular Y-shaped slot microstrip array elements are used for controlling flowing of a surface current and radiating a circular polarized wave. An edge of each bar-type slotting of the Y-shaped slot is provided with a coaxial feed point used for feeding in an electromagnetic wave signal.
Owner:OLINKSTAR CORP
Full-polarization rectification antenna with wide bandwidth and wide power range and energy transmission system
ActiveCN113690612AEasy to collectBeam widthSimultaneous aerial operationsRadiating elements structural formsMicrowaveCoaxial line
The invention discloses a full-polarization rectification antenna with a broadband wide power range and an energy transmission system. The full-polarization rectification antenna comprises a receiving antenna and a rectification circuit; the receiving antenna is a broadband wide-beam dual-polarization antenna and comprises a floor and a feed coaxial line; one side of the floor is provided with a metal wall and a radiator; the metal wall is arranged around the radiating body, and the feed coaxial line is connected with the radiating body and an input port of the rectifying circuit respectively; and the rectifying circuit is a double-input rectifying circuit with a wide broadband power range and is printed on the other surface of the floor. The antenna can be used for broadband microwave wireless energy collection, and has the advantages that the circuit matching performance can be improved in a broadband wide power range, the circuit efficiency is improved, and the conversion from unbalance to balance of power can be realized; after the antenna is combined with a dual-polarization receiving antenna, stable rectification efficiency can be maintained under the condition of different incident polarization rotation angles.
Owner:SOUTH CHINA UNIV OF TECH
A Microstrip Low Axial Ratio Circularly Polarized Antenna for Airborne Radiation Field Measurement
ActiveCN107809000BSmall cross-couplingImprove circular polarization purityParticular array feeding systemsRadiating elements structural formsCoaxial probeAxial ratio
The invention discloses a micro-strip low-axial-ratio circularly-polarized antenna for aerial radiation field measurement. The micro-strip low-axial-ratio circularly-polarized antenna comprises a medium substrate. A plurality of circular slot units in central symmetry are formed in the front surface of the medium substrate through etching. The center of each circular slot unit is provided with a unit center rectangular groove. One side of each unit center rectangular groove is provided with one feed probe welding hole, and the feed probe welding hole adopts coaxial probe backward feed. The plurality of circular slot units are arrayed in a sequential rotation mode. The back surface of the medium substrate is provided with a copper-clad floor. The copper-clad floor is provided with grooves in the places corresponding to the circular slot units respectively; and the feed probe welding holes are arranged in the grooves respectively. The micro-strip low-axial-ratio circularly-polarized antenna improves circular polarization purity, realizes low-axial-ratio characteristics and is suitable for accurate measurement of an aerial microwave radiation field.
Owner:中国人民解放军63660部队
Wideband wide-beam microstrip antenna
ActiveCN119297599Abeam widthhigh gainSimultaneous aerial operationsRadiating elements structural formsWide beamSoftware engineering
The invention discloses a broadband and wide-beam microstrip antenna, and belongs to the technical field of wireless communication and antennas. According to the microstrip antenna, a parasitic patch is introduced to excite fusion of multiple resonant modes so as to achieve the broadband characteristic, a bending unit and a tail end structure are combined to form a snake-shaped bending structure, and the current flow direction is adjusted so as to maintain the high-gain wide-beam characteristic within the broadband range. The microstrip antenna provided by the invention can simultaneously realize the characteristics of wide beam and high gain, the highest gain of the antenna beam can reach 7.9 dBi, and the beam width of the antenna with the gain of more than 3dBi within the bandwidth can reach nearly 120 degrees. A plurality of modes are fused to expand the bandwidth of the antenna by means of a multi-unit structure, tail design, a parasitic unit and the like, about 28% of impedance bandwidth of 4.99 GHz-6. 62GHz can be covered, and the antenna can be expanded to any frequency band. The problem that broadband, high gain and wide beam characteristics cannot be integrated in the same antenna in the prior art can be solved, and stable high gain and wide beam coverage can be kept in a broadband range.
Owner:DALIAN UNIV OF TECH
Adjustable aerodynamic lens system for aerodynamic focusing of aerosols
InactiveCN106442038AWith target sizeStrong controllabilityLiquid dispersion analysisEnergy spectrometersEngineeringAverage size
An adjustable aerodynamic lens system for aerodynamic focusing of aerosols comprises a hollow tube having an inlet terminal, an outlet terminal and a focusing segment located between the inlet terminal and the outlet terminal. The focusing segment includes a plurality of section tubes assembled in a manner to selectively focus aerosols of a specific average size. Each of the section tubes has a focusing orifice, and the diameters of the two adjacent focusing orifices are different. In specific, the section tubes having their focusing orifices of appropriate diameters are chosen according to the average size of aerosol particles to be focused, and assembled in sequence, so as to make aerosol fluid passing through to form a beam of aerosol particles with good focusing quality.
Owner:SUN YAT SEN UNIV
Patch antenna and array antenna comprising same
PendingUS20220224012A1Wide bandwidthWider beam widthIndividually energised antenna arraysSubstantially flat resonant elementsEngineeringMechanical engineering
A patch antenna includes: a substrate; a first radiator disposed on the substrate and having a first shape; a second radiator disposed on the substrate while being spaced a predetermined distance apart from the first radiator, and having a second shape; and a power feeder which supplies a power feed signal to the first radiator, wherein the first radiator includes a first outer edge portion straightly formed in the horizontal direction and second outer edge portions vertically formed from both ends of the first outer edge portion.
Owner:ATCODI CO LTD
L-band broom-shaped antenna
PendingCN112952356ALower levelMeet the needs of useWave based measurement systemsRadiating elements structural formsAntenna designSide lobe
The invention belongs to the technical field of antenna design, and particularly relates to an L-band broom-shaped antenna. The antenna comprises a ridge waveguide feed source (1), a feed source reflection cavity transition structure (2) and a parabolic reflection cavity (3), wherein a ridge-shaped metal sheet extending along a broadside wave band wall is arranged in the ridge waveguide feed source (1); the feed source reflection cavity transition structure (2) is arranged at an outlet of the ridge waveguide feed source (1) and extends in a horn mouth shape, and smooth transition between the feed source reflection cavity transition structure (2) and the parabolic reflection cavity (3) is achieved. The parabolic reflection cavity (3) comprises a parabolic reflection cavity surface (31) and a radiation outlet (32) opposite to the parabolic reflection cavity surface, and beam reflection is carried out through the parabolic reflection cavity surface (31). The antenna has the advantages of wide directional diagram azimuth plane wave beam, narrow pitching plane wave beam, low side lobe level, high wave beam phase flatness and the like, the use requirement and the performance requirement of aircraft target near-field scattering characteristic detection on the measurement antenna are met, and the performance and the test efficiency of a test system are improved.
Owner:SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
Space multi-target detection system and method
ActiveCN108226888BHigh equivalent antenna gainBeam widthWave based measurement systemsObservation dataComputational physics
A space multi-target detection system and method, the method comprising: performing cross-correlation calculations on each of multiple receiving antenna signals; obtaining a brightness distribution function according to the cross-correlation calculation results, and realizing comprehensive aperture mapping of the observation area; using The observed data or predictive calculation realizes the suppression of the cosmic background noise in the synthetic aperture map; according to the observation data or the orbital mechanics model, corrects the image blur caused by the movement of the space object in the synthetic aperture map; judges by the threshold Realize the identification and direction estimation of multiple targets in the synthetic aperture image; for the selected target direction, realize the time delay and phase difference calculation of each antenna relative to the phase center, and perform time delay and phase adjustment; according to the time delay and phase The difference calculation value realizes the alignment of each antenna signal in the selected target direction; the signal value of each receiving antenna is added in the same direction to realize the observation of the signal source in the selected target direction.
Owner:NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
Beidou buoy antenna capable of improving low elevation gain
PendingCN110212290ABeam widthReduce lossAntenna adaptation in movable bodiesRadiating elements structural formsEngineeringBuoy
The invention discloses a beidou buoy antenna capable of improving low elevation gai; the beidou buoy antenna is characterized by comprising an upper-layer antenna radiator, a lower-layer antenna radiator, a feed network circuit board and a frustum metal structural member, wherein the upper-layer antenna radiator, the lower-layer antenna radiator and the feed network circuit board are sequentiallyoverlapped from top to bottom and are arranged on the frustum metal structural member together to form an antenna unit of the frustum structure; the upper-layer antenna radiator and the lower-layer antenna radiator are fixedly connected with the feed network circuit board through tin welding; and each antenna radiator is provided with an independent feeder line and a radio frequency interface. The antenna has the advantages of being wide in beam width, small in loss, light in weight and the like, and is stable and reliable in operation and high in low elevation gain, can be used for beidou first-generation short message communication, and can effectively solve the problem that an existing buoy terminal antenna is relatively narrow in wave beam.
Owner:深圳市朗赛微波通信有限公司
Beidou pole-rod buoy antenna
PendingCN107425273ABeam widthReduce lossAntenna adaptation in movable bodiesRadiating elements structural formsPhysicsFeed line
The invention relates to a Beidou pole-rod buoy antenna. The Beidou pole-rod buoy antenna comprises a plurality of antenna units which are overlaid together to form a pole-shaped structure, the antenna units comprise dielectric cylinder bodies and feed network circuit boards positioned on the bottoms of the dielectric cylinder bodies; a plurality of helical arms are arranged on the peripheries of the dielectric cylinder bodies at intervals; a short-circuit branch knot and a feed point are arranged at a lower end of each helical arm; the feed network circuit boards are provided with ground plates and micro-strip feed lines; the short-circuit branch knots at the lower ends of the helical arms are welded together with the ground plates on the feed network circuit boards; and the feed points at the lower ends of the helical arms are welded together with the micro-strip feed lines on the feed network circuit boards. The Beidou pole-rod buoy antenna has the characteristics of wide wave beam, low power consumption, light weight and the like, is stable and reliable in working, and is high in integral radiation performance, so that the problems of large weight and narrow wave beam existing in the conventional buoy terminal antenna are solved.
Owner:FUZHOU FUDA BEIDOU COMM TECH CO LTD
Wide beam multi-arm slot helical antenna
ActiveCN104701622BSimple feeding networkGood symmetryRadiating elements structural formsAntennas earthing switches associationWide beamDielectric substrate
The invention discloses a wide-beam multi-arm slot helical antenna, which is used to solve the problem of complex feed structure of the existing four-arm helical antenna. Including annular cylindrical dielectric substrate (1), annular conical dielectric substrate (2), annular cylindrical metal patch (3), annular conical metal patch (4), series-fed microstrip line (5), coaxial interface ( 6) and load resistor (7); the inner and outer surfaces of the annular columnar dielectric substrate (1) are respectively printed with a series-fed microstrip line (5) and an annular columnar metal patch (3). The series-fed microstrip line (5) N evenly distributed sector-shaped pieces (51) are provided on the annular columnar metal patch (3), and coupling adjustment gaps (31) corresponding to the sector-shaped pieces (51) are etched on the annular columnar metal patch (3); the outer surface of the annular cone-shaped dielectric substrate (2) An annular conical metal patch (4) printed with etched radiating spiral slits (41). The invention has the advantages of simple feed structure and wide beam, and can be used in fields such as communication and navigation.
Owner:XIDIAN UNIV
An extremely wide beam broadband low backlobe GNSS positioning antenna
The present application provides an extremely wide beam, broadband, low back lobe GNSS positioning antenna, comprising a radiating plate, a feeding probe, a cavity, a feeding network, a plurality of radiating plate dielectric gaskets and radiating plate dielectric screws: the radiating plate comprises a directly fed radiating plate 1, a directly fed radiating plate 2, a parasitic plate 1 and a parasitic plate 2; the feeding probe is fixed to the directly fed radiating plate 1 and the directly fed radiating plate 2; the radiating plate dielectric screw passes through the radiating plate and the radiating plate dielectric gasket, and is fixed to the cavity by threads; the radiating plate dielectric gaskets are respectively located between the radiating plate and the cavity, and are used to maintain the height of the radiating plate and make the radiating plate parallel to the upper surface of the cavity; the feeding network is arranged at the lower part of the cavity, and is electrically connected to the directly fed radiating plate 1 and the directly fed radiating plate 2 through the feeding probe, and is used to directly feed the directly fed radiating plate 1 and the directly fed radiating plate 2, and to couple and feed the parasitic plate 1 and the parasitic plate 2, so that the antenna is compatible with more navigation frequency bands and a wider beam.
Owner:NAT SPACE SCI CENT CAS