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56results about How to "Good circular polarization characteristics" patented technology
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Compact type plane dual-band omnidirectional circularly polarized antenna
InactiveCN102931479AGood omnidirectional radiation performanceSimple structureSimultaneous aerial operationsAntenna supports/mountingsCapacitanceElectrical conductor
The invention discloses a compact type plane dual-band omnidirectional circularly polarized antenna. The compact type plane dual-band omnidirectional circularly polarized antenna is characterized by comprising a plane radiating antenna, a center shorting pin, an input connector and a feed probe; the plane radiating antenna sequentially comprises a capacitor chip, a medium substrate I, a radiating chip, a medium substrate II and a floor from top to bottom, and an air layer is arranged between the radiating chip and the medium substrate II; the capacitor chip is connected with an inner conductor of the input connector through the feed probe, protection holes are arranged at corresponding positions on the radiating chip and the floor, the feed probe penetrates through the positions on the radiating chip and the floor, and inner diameters of the protection holes are larger than the diameter of the feed probe; and the radiating chip is composed of a primary round radiation chip and three groups of radiating units which are of same structures, the three groups of radiating units are loaded on the periphery of the primary round radiation chip and composed of six arc vibrators, and each group of radiating units is composed of two arc vibrators with different length. The antenna has the advantages of being good in omnidirectional radiation, good in circular polarization in the ranges of 360 degrees on a plane and flexible in dual-band ratio.
Owner:DALIAN MARITIME UNIVERSITY
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
Ku-band circularly polarized dielectric resonator antenna
InactiveCN103545602AReduce antenna sizeHigh gainRadiating elements structural formsAntenna earthingsPhysicsDielectric substrate
The invention relates to a Ku-band circularly polarized dielectric resonator antenna which comprises a metal grounding plate and a micro-strip feeder line. The metal grounding plate is arranged on the upper surface of a dielectric substrate, and the feeder line is arranged on the lower surface of the dielectric substrate. A three-tier dielectric resonator is arranged at the center of the upper surface of the metal grounding plate; a crisscrossed gap is formed in the center of the metal grounding plate; the inner end of the micro-strip feeder line is arranged right below the crisscrossed gap and forms a 45-degree angle with the same; two cascade-connection dumbbell-shaped groove gaps are formed in the grounding plate. Impedance bandwidth of the antenna is 27.67%, circularly polarized axial ratio bandwidth 6.56%. within working frequency, the maximum gain of the antenna is 8.2dB, the minimum gain is 6.0dB, and the antenna has wider coverage range. Axial ratio of the 12.2GHz position is approximately 0.09dB, and the antenna has good circularly polarized characteristics. The antenna covers commonly used working frequency bands of satellite television broadcasting in IT3, and is applicable to a satellite television broadcasting system within 11-14.5GHz frequency bands.
Owner:SHANGHAI UNIV
High-gain planar wide-frequency antenna
InactiveCN101872895AHigh gainGood standing waveRadiating elements structural formsLoop antennasArchimedean spiral antennaMicrowave technology
The invention relates to a high-gain planar wide-frequency antenna which relates to a microwave technology and comprises an Archimedean spiral antenna radiation sheet, a tapered balun and a shell, wherein a reflection cavity is arranged in the shell, and the Archimedean spiral antenna radiation sheet is connected with a signal source accessing end through the tapered balun. The invention has the advantages that the gain of a wide-frequency spiral antenna is improved to a great degree, the circular polarization characteristic of far-field radiation is good, and meanwhile, the standing wave of the whole antenna system also has better performance. The invention has high gain, stable gain, lower axial ratio and wide application potential in the aspects of military affairs and civil use.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Small-sized dual-band dual-circular polarization wide beam multi-layer microstrip antenna
InactiveCN101662074AReduce distractionsGood circular polarization characteristicsAntenna couplingsIndependent non-interacting antenna combinationsElevation angleCircularly polarized antenna
The invention relates to a small-sized dual-band dual-circular polarization wide beam multi-layer microstrip antenna which is formed by sequentially overlaying an upper layer S wave band right circular polarized antenna and a lower layer L wave band left circular polarized antenna, wherein the a second medium plate is arranged between the upper layer S wave band right circular polarized antenna and the lower layer L wave band left circular polarized antenna; the directions of electric fields of the upper layer S wave band right circular polarized antenna and the lower layer L wave band left circular polarized antenna are opposite; the upper layer S wave band right circular polarized antenna consists of a square patch of a first cutting angle, a first grounding plate, a probe, an adjustmentpatch and a first coaxial feed cable; and the lower layer L wave band left circular polarized antenna consists of the square patch of a second cutting angle, a second grounding plate and a second coaxial feed cable. In the invention, a feed structure of the upper layer S wave band antenna is reversely arranged to be opposite with the direction of the electric field of the lower layer L wave bandantenna, the interference of the upper layer S wave band antenna and the lower layer L wave band antenna is the smallest, and good circular polarized properties can be obtained. The invention can meetthe conditions that plus is more than-3dB when an elevation angle of L wave band is 5 degrees, and the plus is more than 0 dB when the elevation angle of the L wave band is 20 degrees.
Owner:CHANGAN UNIV
Broadband circularly polarized filter antenna used for Beidou terminal
ActiveCN106329099AGood circular polarization characteristicsWith band pass functionRadiating elements structural formsAntenna earthingsResonanceBroadband
The invention relates to a broadband circularly polarized filter antenna used for a Beidou terminal and belongs to the technical field of antennas of wireless communication terminals. A folding technology is utilized by the antenna; and a secondary cascade power divider at a bottom layer and a 90-degree phase shifter are cascaded to provide a top radiation patch with a relatively large circular polarization bandwidth. In order to further improve the circular polarization performance of the antenna, two orthogonal bow-tie gaps are etched on the top radiation patch loaded by a regular hexagon gap; and the top patch is divided into five radiation areas to generate multimode resonance, good impedance matching is achieved and the enough circularly polarization bandwidth is obtained. Furthermore, a feed network and a radiation antenna are arranged at two sides of a grounding plate respectively, so that energy can intensively radiate an upper half space effectively, and the antenna not only can radiate in a right-hand circular polarization manner, but also can achieve relatively good circular polarization trap performance on a specific frequency point.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Low-profile two-dimensional wide-angle scanning circularly polarization phased-array antenna
InactiveCN111326852ASimple structureLight in massRadiating elements structural formsAntenna earthingsDielectric plateEngineering
The invention discloses a low-profile two-dimensional wide-angle scanning circular polarization phased-array antenna, and aims to provide an antenna structure which is easy to integrate and has good wide-angle scanning gain characteristics and circular polarization characteristics. According to the technical scheme, each 3D structure antenna unit forms an array unit of the two-dimensional wide-angle scanning circular polarization phased-array antenna through metal columns which are arranged between an annular radiator and a circular polarization patch slotting radiator in a circumferential circular array mode; each 3D structure antenna unit is fixed on the two-dimensional layer surface of the upper dielectric plate through a feed column fixedly connected to the lower surface of the circularly polarized slotted patch radiator; the feed column penetrates through the lower dielectric plate, the four 3D structure antenna units are connected with the annular radiator upwards and are connected with the feed base disc downwards, the four adjacent 3D structure antenna units form a 2*2 rectangular arrangement subarray in a touch type feed and 90-degree sequential rotation arrangement mode,and the four feed base discs are delayed by 90 degrees clockwise in sequence for feeding, so that the optimal right-handed circular polarization performance is obtained.
Owner:10TH RES INST OF CETC
Ultra-wideband electromagnetic super-surface circular polarizer
ActiveCN105390819ADispersion characteristic eliminationHigh bandwidthAntennasUltra-widebandResonance
The invention discloses an ultra-wideband electromagnetic super-surface circular polarizer, which comprises a dielectric substrate, a metal resonance array and a metal grounding plate, wherein the metal resonance array is printed on the top surface of the dielectric substrate; the metal grounding plate is printed on the back surface of the dielectric substrate; the metal resonance array comprises a plurality of micro-crack Jerusalem cross units which are arranged in a periodic matrix; each micro-crack Jerusalem cross unit is equal in structure parameter and comprises two orthorhombic I-shaped metal arms, namely a horizontal I-shaped metal arm extending in the horizontal direction, namely an X axis, of the dielectric surface, and a vertical I-shaped metal arm extending in the vertical direction, namely a Y axis, of the dielectric surface; the center of a horizontal metal wire at the middle part of the horizontal I-shaped metal arm is intersected with the center of a vertical metal wire at the middle part of the vertical I-shaped metal arm; two micro-cracks which run through the horizontal metal wire at the middle part are etched on the horizontal metal wire at the middle part of the horizontal I-shaped metal arm; and the two micro-cracks are symmetrically located at the left side and the right side of the vertical metal wire at the middle part of the vertical I-shaped metal arm. The ultra-wideband electromagnetic super-surface circular polarizer has the characteristic of high working frequency.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Anti-multipath-interference broadband low-axial-ratio GNSS antenna
ActiveCN106532278AIncrease amplitudeGood impedance stabilityAntenna supports/mountingsRadiating elements structural formsElectrical conductorAxial ratio
The invention discloses an anti-multipath-interference broadband low-axial-ratio global-navigation-satellite-system (GNSS) antenna comprising four rectangular radiating units, corresponding four triangular matching connection units, four via holes, a microstrip line power divider phase-shift network, a feed via hole, a dielectric substrate, a circular plate type floor, four via hole round units, a feed via hole round unit, and a metal cylinder. The four rectangular radiating units and the four triangular matching connection units form a centric symmetric structure and are arranged right above the dielectric substrate. The four via holes pass through the dielectric substrate to realize communication between the triangular matching connection units and the port of the microstrip line power divider phase-shift network. The microstrip line power divider phase-shift network is arranged at the back of the dielectric substrate. The feed via hole is used for connecting the microstrip line power divider phase-shift network with a conductor arranged inside a coaxial feeder. The circular plate type floor is arranged at the front side of the dielectric substrate and the edge of the circular plate type floor is connected with the metal cylinder. The anti-multipath-interference broadband low-axial-ratio GNSS antenna disclosed by the invention has characteristics of good anti-multipath-interference performance, broadband, low axial ration, wide beam, and small size and the like.
Owner:SOUTH CHINA UNIV OF TECH
Miniature broadband helical antenna
ActiveCN105098340AAchieve circular polarizationImprove standing wave characteristicsRadiating elements structural formsAntennas earthing switches associationMiniaturizationBroadband
The invention discloses a miniature broadband helical antenna. The miniature broadband helical antenna comprises a metal cavity (4), wherein the metal cavity (4) is comprehensively of a hollow tubular structure, a first wave absorption material layer (3) is arranged on the inner wall of the metal cavity (4), a feeding Balun (5) is arranged in the metal cavity (4), an antenna layer (1) is fixedly arranged on the upper end surface of the metal cavity (4), a metal rear cover (6) is fixedly arranged on the lower end surface of the metal cavity (4), a second wave absorption material layer (2) is arranged at the bottom of the antenna layer (1), the top of the feeding Balun (5) is provided with a feeding gap (11) in an upward extension way, the feeding gap (11) is in contact with a planar helical antenna (9), and a feeding connector (7) is arranged at the bottom of the feeding Balun (5). In the miniature broadband helical antenna, the planar helical antenna and the layered wave absorption material are used for forming a radiator, the layered wave absorption material is pasted on the inner wall of the metal cavity, and meanwhile, the design of broadband, circular polarization and miniaturization is achieved; and the reflection between the feeding Balun and the radiator is effectively reduced, and the standing wave characteristic of the antenna is improved.
Owner:XIDIAN UNIV +1
Antenna oscillator assembly, antenna and communication equipment
ActiveCN104966883AFlexible controlSolve multi-band broadband problemsSimultaneous aerial operationsAntenna supports/mountingsMicrowaveDielectric plate
The invention relates to an antenna oscillator assembly, an antenna and a piece of communication equipment. The oscillator assembly comprises a cross sector intersecting oscillator, a support feed assembly, a ground plate and a polarization isolation power dividing device. The cross sector intersecting oscillator is fixed on the top of the support feed assembly. The bottom of the support feed assembly is fixed on the center of the ground plate. The polarization isolation power dividing device is arranged on the central position of the ground plate back side. The cross sector intersecting oscillator is connected with the polarization isolation power dividing device through a coaxial supply line inside the support feed assembly. The antenna oscillator assembly which is no longer dependent on microwave dielectric plates solves the multi-frequency wideband circular polarization feed problem. Meanwhile, by forming the cross sector intersecting oscillator and adjusting the height of the cross sector intersecting oscillator away from the ground plate, the antenna oscillator assembly achieves more flexible directional diagram control and optimized circular polarization characteristics. By means of the polarization isolation power dividing device, the antenna oscillator assembly can make de-rotation multipath signals suppressed. The antenna oscillator assembly which has the characteristics of wideband, low consumption and high efficiency can make the volume, the weight and the cost of the antenna obviously reduced.
Owner:姜新发
Two-dimensional circularly-polarized wide-angle scanning phased-array antenna
ActiveCN112787098AReduce gainHigh gainAntenna arraysRadiating elements structural formsEngineeringImpedance matching
The invention discloses a two-dimensional millimeter wave circularly-polarized wide-angle scanning phased-array antenna, and relates to the technical field of millimeter wave antennas. According to the technical scheme, an antenna radiation patch is connected with a rectangular parasitic patch through a high impedance matching microstrip line which is provided with a cross-carved equal length in the center and is used for carrying out impedance matching on the antenna, and a windmill-shaped microstrip radiation patch excitation equal-amplitude in-phase polarization orthogonal degenerate mode is manufactured on the symmetric center of a diagonal bisector of the corner of the antenna radiation patch; feed probes penetrate through the antenna dielectric layer and are connected with the antenna radiation patch through the four rectangular parasitic patches, the four feed probes 4 of each antenna unit feed through rotary feed structures which are equal in amplitude and sequentially differ by 90 degrees, and the windmill-shaped microstrip radiation patch is connected with rectangular blocks of the four rectangular parasitic patches of the four metallized probes for feed. feeding in equal-amplitude excitation with the phase difference of 90 degrees is performed in sequence to form circular polarization radiation, and the antenna arrays are arranged in a rectangular manner at equal intervals according to unit intervals to form an antenna array surface.
Owner:10TH RES INST OF CETC
Millimeter wave omnidirectional circularly polarized antenna used for 5G communication
ActiveCN108832280AGood omnidirectional circular polarization characteristicsWideRadiating elements structural formsIndividually energised antenna arraysPhysicsFrequency band
The invention provides a millimeter wave omnidirectional circularly polarized antenna used for 5G communication. The millimeter wave omnidirectional circularly polarized antenna comprises a first dielectric plate and a second dielectric plate which are stacked up and down; at least four square parasitic patch units with annular gaps in one diagonal line are printed on the upper surface of the first dielectric plate to form a rotary symmetric structure, and the angles between the adjacent parasitic patch units are equal; a feed network and at least four square radiation patch units with disturbance branches on a pair of opposite corners are printed on the upper surface of the second dielectric plate, and a metal grounding plate is printed on the lower surface of the feed network; each output arm of the feed network comprises a section of tapered gradual change line; the radiation patch units are located under the parasitic patch units; and the diagonal line where the disturbance branches are located and the diagonal line wherein the annular gaps of the parasitic patch units are located are consistent in direction. According to the antenna, high omni-directional circular polarizationcharacteristics can be kept in a 5G communication at 28GHz working frequency band, and the power capacity of the antenna is improved while the D2D communication requirement is met.
Owner:XIDIAN UNIV
Reconfigurable mono-pulse antenna
ActiveCN105140658AGood circular polarization characteristicsGood standing wave characteristicsAntenna arraysRadiating elements structural formsCoplanar waveguideTransmission line
The invention provides a reconfigurable mono-pulse antenna. The reconfigurable mono-pulse antenna comprises fourantenna units arranged along longitudinal and transversal directions in a two-dimensional array manner, four switches in one-to-one correspondence with the antenna units, and a one-to-four equal-amplitude and equal-phase-position power distributor; each antenna unit comprises two feed ports; the feed ports at the two ends of each antenna unit are connected with the switches respectively through finite ground coplanar waveguide transmission lines; among the ports at the two ends of the antenna units, only one port is in the working state though the switch control; and four branches of the one-to-four equal-amplitude and equal-phase-position power distributor are connected with the switches respectively, and can feed one port of the two ports of the four antenna units separately through the switch control. The input ports of the antenna units can be changed by changing the states of the switches so as to change the phase positions of the antenna units to form three different antenna patterns: sum beams, azimuth difference beams and pitch difference beams so as to realize mono-pulse positioning.
Owner:SOUTHEAST UNIV
Antenna and wireless communication device
PendingCN106602258AGood phase center stabilityGood symmetryRadiating elements structural formsAntennas earthing switches associationFrustumCommunication device
The invention discloses an antenna and a wireless communication device. The antenna comprises an upper radiating plate, a frustum and a lower feed network layer. The upper radiating plate consists of a first substrate, a first conductive layer, and four feed points in a rotational symmetric mode; the first conductive layer is arranged at the upper surface of the first substrate; and the four feed points are formed on the first conductive layer and are connected with the lower feed network layer electrically. The frustum is provided with an accommodation space; and the upper radiating plate and the lower feed network layer are arranged in the accommodation space at an interval. According to the antenna disclosed by the invention, the four feed points in a rotational symmetric mode are used for feeding and the difference value between phases of the feed points are 90 degrees, so that the polarization characteristic can be realized. Moreover, with the antenna having the four feed points, the high phase center stability can be realized; the antenna having the four feed points has high symmetry, so that the roundness feature of the antenna can be realized and the high-precision measurement requirement can be met.
Owner:JIANGSU EAST CENTURY NETWORK INFORMATION +1
Polarized reconfigurable antenna
ActiveCN107046169AChange disturbanceAchieving polar reconfigurabilityRadiating elements structural formsAntenna earthingsReconfigurable antennaPower flow
The invention discloses a polarized reconfigurable antenna. The polarized reconfigurable antenna comprises a dielectric substrate (1), an upper metal layer (21), a lower metal layer (22), a pair of controllable grounding through holes (5) with symmetrical structures, and more than two metal through holes (41) in array configuration to form a cavity body (4); the upper metal layer (21) is provided with an antenna radiation structure while the lower metal layer (22) is provided with an antenna feed structure; the grounding through holes (5) are connected with a switch separately; and the switch is used for controlling the grounding states of the grounding through holes (5) to realize different current disturbances. By changing the switch state, namely, changing the states of the pair of controllable grounding through holes, current disturbances are changed to form three kinds of different polarized waves, including linear polarization wave, left-hand circular polarization wave and right-hand circular polarization wave, thereby realizing the polarized reconfigurable antenna.
Owner:SOUTHEAST UNIV
Circular cone logarithm helical antenna with frustum
InactiveCN103346385AEnhanced pattern featureHigh gain characteristicRadiating elements structural formsHelical lineCircular cone
The invention relates to a circular cone logarithm helical antenna, in particular to a circular cone logarithm helical antenna with a frustum. The problems that according to an existing circular cone logarithm helical antenna, a directional diagram is prone to sectioning and gain is low are solved. The circular cone logarithm helical antenna with the frustum comprises two single-arm circular cone logarithm helical units which rotate by 180 degrees along normal lines of the two sing-arm circular cone logarithm helical units and are arranged in a winding mode. The arithmetic expression of the two sing-arm circular cone logarithm helical units (1) is p=p0exp b phi, wherein 2theta0 is the included angle among the circular cone generatrix and the normal lines and called a circular cone opening angle. Alpha is the included angle between the circular cone logarithm helical winding direction and the circular cone genetatrix and called a circular cone inclination angle. Phi is an independent variable and namely the included angle among the top point of a polarization coordinate axis and a coordinate axis and all points of a helical line. The circular cone logarithm helical antenna further comprises the hollow frustum, and the two single-arm circular cone logarithm helical units are arranged in the hollow frustum, wherein 2theta0=15-20 degrees, and alpha=70-80 degrees. The circular cone logarithm helical antenna is used for the fields of mobile phone antennas, wireless local area networks and satellite communications.
Owner:HARBIN INST OF TECH
Series-feed circularly-polarized antenna normal array
ActiveCN110233336AImprove radiation efficiencyGood circular polarization characteristicsParticular array feeding systemsRadiating elements structural formsCircularly polarized antennaRadiation pattern
The invention discloses a series-feed circularly-polarized antenna normal array. The series-feed circularly-polarized antenna normal array comprises N series-feed circularly-polarized patch antennas,wherein each series-feed circularly-polarized patch antenna is provided with dual ports, a first port and a second port are arranged on each patch antenna and are arranged on a 90-degree central anglearc line, and the N patch antennas are normally arranged at equal distance to form a multi-layer columnar structure along a radiation direction diagram. By the radiation normal array, the gain is improved, meanwhile, only the thickness is increased, while the planar size (normal projection) is not changed, further planar array is facilitated, the gain increment quantity of four unit arrays exceeds 4dB; the radiation efficiency of the normal array is farther higher than radiation of the units, the normal array has better circularly-polarized characteristic than those of the units, left-handed / right-handed circularly-polarized switching still can be easily achieved after arraying, the series-feed unit number N can be freely selected according to a demand, and thus, a feasible scheme for building a three-dimensional array also is provided. A wave absorption material wraps a cable, and the interference of the polarization wave can be effectively eliminated.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Antenna and communication system
InactiveCN106532257AImproving Impedance BandwidthGood circular polarization characteristicsRadiating elements structural formsAntennas earthing switches associationElectricityCommunications system
The invention provides an antenna and a communication system. For paths of output signals of a feeding network are all coupled to a lower radiation surface through air firstly, and then coupled to an upper radiation surface through the lower radiation surface via air, so that the antenna has high impedance bandwidth, and the requirement of a full-frequency-band coverage satellite is satisfied; and in addition, the amplitudes of the four paths of output signals output by the four right-ward 7-shaped probes of the feeding network are equivalent, and the phase difference is 90 degrees in sequence, so that the antenna has good circular polarization feature.
Owner:XIAN UNISTRONG NAVIGATION TECH CO LTD
Transmitting-receiving common-aperture wide-angular-domain scanning satellite communication antenna array and aircraft with same
InactiveCN113224520AReduce gainImprove isolationParticular array feeding systemsAntenna adaptation in movable bodiesMicrowaveDielectric plate
The invention provides a transmitting-receiving common-aperture wide-angular-domain scanning satellite communication antenna array and an aircraft with the same. The antenna array comprises a metal bottom plate, a plurality of antenna units, and a plurality of metal columns, wherein an arbitrary antenna unit comprises five microwave dielectric plates, a transmitting radiation patch, a receiving radiation patch, a coupling feed patch, a feed network, a metal probe and a feed connector which are sequentially arranged from top to bottom, the feed network is a 3dB bridge feed network, and the feed network is arranged on the lower surface of the fourth microwave dielectric plate; the fourth microwave dielectric plate has a plurality of first metalized via holes, the fifth microwave dielectric plate has a plurality of second metalized via holes, and the plurality of first metalized via holes and the plurality of second metalized via holes are located around the feed network; and a plurality of metal columns are arranged on the outer sides of the plurality of antenna units. By applying the transmitting-receiving common-aperture wide-angular-domain scanning satellite communication antenna array and the aircraft of the invention, the technical problems that the satellite communication small-frequency-ratio transceiving common-caliber design cannot be realized and the gain is slowly reduced during large-angle scanning in the prior art are solved.
Owner:BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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
GPS antenna positioning structure
InactiveCN110444860ABroadened beamwidthIncreased low elevation gainAntenna adaptation in movable bodiesRadiating elements structural formsElevation anglePhase shifted
The invention discloses a GPS antenna positioning structure, including a helical antenna group and a PCB. The helical antenna group is welded together with the PCB by ultrasonic welding, the helical antenna group includes a four-arm helical antenna, the single-arm helical antenna is composed of two gradient helixes; the PCB comprises a horizontal substrate and a vertical substrate formed by a Wilkinson phase-shift feed network; the horizontal substrate is provided with a first radio frequency port, a second radio frequency port, a third radio frequency port, and a fourth radio frequency port in matched connection with the helical antenna; and the second radio frequency port and the fourth radio frequency port are connected with 90-DEG phase shifters. The GPS antenna positioning structure has the beneficial effects that in a mode of optimizing the helical arm, wide-band operating performance can be better realized, the antenna beam width is widened, and the low elevation angle gains ofthe antenna are improved.
Owner:安徽省民融军信息技术有限公司
Low-axial-ratio broadband circularly polarized micro-strip antenna
InactiveCN103647155AImprove applicationSmall sizeRadiating elements structural formsAntennas earthing switches associationMetal stripsAxial ratio
The invention relates to a band circularly polarized micro-strip antenna and in particular relates to a low-axial-ratio broadband circularly polarized micro-strip antenna, aiming at solving the problems that a traditional circularly polarized micro-strip antenna is narrow in frequency band and poor in axial ratio characteristics. A first upper-layer metal strip is printed along the edge on one side of the front side of a dielectric slab; a third upper-layer metal strip is printed on the edge on the other side of the front side of the dielectric slab; a second upper-layer metal strip is printed along the edge on the dielectric slab; a fourth upper-layer metal strip is printed on the lower part of the front side of the dielectric slab; a fifth upper-layer metal strip is printed in a gap; a sixth upper-layer metal strip is printed in the middle of the front side of the dielectric slab; a seventh upper-layer metal strip is printed above the sixth upper-layer metal strip on the front side of the dielectric slab; an eighth upper-layer metal strip is printed below the sixth upper-layer metal strip on the front side of the dielectric slab; a lower-layer metal strip is printed at the bottom on the back of the dielectric slab. The low-axial-ratio broadband circularly polarized micro-strip antenna is applied to the field of radio communication.
Owner:HARBIN INST OF TECH
Small ultra-wideband circularly polarized planar helical antenna
PendingCN112701487AStable radiation characteristicsImpedance Bandwidth GuaranteedLogperiodic antennasRadiating elements structural formsUltra-widebandEngineering
The invention discloses a small ultra-wideband circularly polarized planar helical antenna, which comprises a self-compensating composite helical structure serving as a radiating element of the antenna and a microstrip gradient balun structure for feeding, wherein the microstrip gradient balun structure is a double-sided structure, two unbalanced microstrip lines are gradually changed into balanced parallel double lines, and impedance conversion is realized in the gradual change process; and the unbalanced end of the microstrip gradient balun structure extends downwards to a reflector. The small ultra-wideband circularly polarized planar helical antenna provided by the invention maintains a stable radiation property, the impedance bandwidth of the antenna reaches 150% (2-18GHz), a standing-wave ratio is less than 2, the antenna maintains an excellent circular polarization property in the working bandwidth (2-18GHz), and an axial ratio is less than 3dB. On the basis of ensuring the radiation property, impedance bandwidth and axial ratio bandwidth of the antenna, the plane size and profile size of the antenna are reduced, and the property of miniaturization is achieved.
Owner:南京爱而赢科技有限公司
S-band dual-circular-polarization high-integration broadband phased array subarray antenna
PendingCN113381177AImprove VSWRSimple structureParticular array feeding systemsAntenna supports/mountingsMicrostrip patch antennaSoftware engineering
The invention relates to an S-band dual-circular-polarization high-integration broadband phased array subarray antenna, and belongs to the technical field of communication. The antenna comprises an independent radiation layer and a multi-layer microstrip patch antenna; the PCB 4 of the independent radiation layer is a Tacic single-sided core board; the multi-layer microstrip patch antenna is formed by mixing and pressing a single-face core board PCB 1, a single-face core board PCB 2 and a double-face core board PCB 3 through prepregs, so as to form a feed network strip line model. Taconic single-face core boards are adopted as the single-face core board PCB 1 and single-face core board PCB 2 of the multi-layer microstrip patch antenna, and a Taconic double-face core board is adopted as the double-face core board PCB 3; the independent radiation layer and the multi-layer microstrip patch antenna are fastened through a metal stud. The antenna has the advantages of being high in isolation degree, wide in working bandwidth, good in circular polarization characteristic and excellent in voltage standing wave ratio, and meanwhile the antenna has the advantages of being low in profile, simple in structure, easy to machine and the like.
Owner:CHONGQING AEROSPACE ROCKET ELECTRONIC TECH CO LTD
Combined double wideband circularly-polarized antenna unit
InactiveCN105428798AWorking frequency bandwidthWide lobe widthRadiating elements structural formsAntenna earthingsElectrical conductorCircularly polarized antenna
The invention discloses a combined double wideband circularly-polarized antenna unit which comprises a self-supporting and grounding integrated structure and a crisscross array, wherein a slotted outer conductor is vertically arranged at the central position of the self-supporting and grounding integrated structure; the crisscross array is arranged at the top end of the slotted outer conductor; the self-supporting and grounding integrated structure specifically comprises four antenna bent and gradient arrays; a small head end of each antenna bent and gradient array is connected by a metal column; the large head end of each antenna bent and gradient array is directly connected with a floor board; power divider units 6 are arranged on the back sides of four antenna bent and gradient arrays 4 by adopting a back-to-back mode; the power divider units 6 are connected with the other ends of the corresponding metal columns 5. According to the combined double wideband circularly-polarized antenna unit disclosed by the invention, the problems that an communication antenna is narrow in frequency band and in wave beam, the system is complex and is large in occupied area, and a plurality of antennae are integrated together to cause serious mutual interference existing in the prior art are solved.
Owner:西安红叶通讯科技有限公司
Dual-circularly-polarized broadband wide-beam antenna
ActiveCN113193342AGood circular polarization characteristicsIncreased Level GainRadiating elements structural formsDisturbance protectionMagnetic currentEngineering
The invention provides a dual-circularly-polarized broadband wide-beam antenna. The antenna comprises a circular waveguide, a feed probe, a load probe, a partition plate phase shifter and a metal ring group; the feed probe, the load probe and the partition plate phase shifter are all located in the circular waveguide, and the feed probe and the load probe are located on the two sides of the partition plate phase shifter respectively. One end face of the circular waveguide is closed, and the other end face is provided with an opening; energy fed in by the feed probe is converted into circularly polarized waves through the partition plate phase shifter and then is radiated outwards from the opening; the metal ring group is positioned beside the opening and is used for introducing horizontal annular magnetic current; the side wall, close to the opening, of the circular waveguide is provided with a hollowed-out groove set used for introducing vertical magnetic current. Circularly polarized waves with directional radiation are formed through the circular waveguide and the partition plate phase shifter; horizontal annular magnetic current is introduced, and the half-power beam width is increased; the vertical magnetic current is introduced, the half-power beam width in the broadband is further improved, the difference value of the E theta sum in a certain beam is reduced, and the axial ratio beam width is improved.
Owner:XIDIAN UNIV +1
A Broadband Circularly Polarized Magnetoelectric Dipole Antenna
ActiveCN112186339BSimple structureIncrease circular polarization bandwidthRadiating elements structural formsAntenna earthingsDielectric substrateBroadband
The present application discloses a broadband circularly polarized magnetoelectric dipole antenna. By setting a metal parasitic ring, the circularly polarized bandwidth of the antenna can be greatly improved without changing the main structure of the antenna. At the same time, the broadband circularly polarized magnetoelectric dipole antenna of the present application adopts the feeding method of slot coupling, and adopts the metal feeding strip on the lower surface of the dielectric substrate to couple the coupled signal to the horizontal metal patch above the metal floor through the rectangular slot and vertical metal patch, and set a metal parasitic ring around the metal patch module to introduce a new circularly polarized resonant mode for the magnetoelectric dipole antenna, so that the antenna has a better circular polarization in the broadband operating bandwidth. Polarization characteristics. In addition, the structure of the metal parasitic ring will not affect the structure of the antenna, and, on the premise of maintaining the broadband circular polarization bandwidth, the gain fluctuation in the working frequency band is small, and the gain bandwidth of the broadband and better flat gain.
Owner:GUANGDONG UNIV OF TECH
A Compact Circularly Polarized Microstrip Antenna and Its Antenna Array
ActiveCN104795639BCompact structureGood circular polarization characteristicsRadiating elements structural formsPolarised antenna unit combinationsSquare arrayDielectric plate
The invention relates to a compact circularly polarized microstrip antenna and its antenna array. The upper and lower dielectric plates and the substrate of the circularly polarized microstrip antenna are the same square, the square radiation patch is attached to the surface of the upper dielectric plate, and the substrate is attached to the upper surface of the upper dielectric plate. Attached to the upper surface of the lower dielectric board, the microstrip feeder is attached to the lower surface of the lower dielectric board. There is an air layer between the substrate and the upper dielectric board. In the center of the substrate, there are cross grooves in which vertical and horizontal grooves bisect each other vertically and horizontally. There are 3 to 7 grooves on each side of the radiation patch on the top layer. The groove on the center line is the deepest, and the depth of the grooves on both sides gradually decreases. The groove of is symmetrical about the center of the radiation patch. The compact circularly polarized microstrip antenna is an antenna array composed of array elements. Each power divider is connected to each array element feeder, and multiple array elements are arranged in a straight line on the same plane, or arranged in a square array on the same plane. The invention has better circular polarization characteristics, reduces the size of the antenna, reduces the distance between elements of the antenna array to 0.6λ, and has a compact structure of the antenna array.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Circular polarization implementation mode
PendingCN111816990AGood circular polarization characteristicsSimplified circular polarization implementationRadiating elements structural formsAntennas earthing switches associationAntenna designCapacitance
The invention provides a circular polarization implementation mode. The circular polarization implementation mode comprises the steps of taking three points A, B and C on the circumference of a metalloop antenna; performing feeding on the point A, and connecting capacitors or inductors with specific reactance values in series at the point B and the point C, wherein the phase difference of the twocharacteristic modes is 90 degrees at frequency points with equal amplitudes, the antenna designed by adopting the method can achieve good circular polarization characteristics, and an axial ratio simulation result at a resonant frequency point shows that the axial ratio is less than 3dB.
Owner:KUNSHAN RUIXIANG XUNTONG COMM TECHCO
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