38results about How to "Low cross-polarization level" patented technology

The invention belongs to the field of the antenna technology, and particularly relates to a broadband high-isolation low-cross-polarization dual-polarization microstrip antenna array based on an SIW technology which can be used for various aspects, such as satellite communications, radar orientation, and synthetic aperture radar. The broadband high-isolation low-cross-polarization dual-polarization microstrip antenna array based on the SIW technology comprises 5 layers of printed circuit boards and 54 integrated metal props. In five layers of the printed circuit boards, the medium of the first layer of the printed circuit board and the medium 20 of the second layer of the printed circuit board are Rohacell HF51 foams, the medium of the third layer of the printed circuit board, the medium of the fourth layer of the printed circuit board and the medium of the fifth layer of the printed circuit board are Rogers 5880 medium boards. The antenna is designed on the basis of the microstrip antenna, and the antenna is integrated with the feed and radiation. The structure is simple, and the printed circuit technology is used for producing. The broadband high-isolation low-cross-polarization dual-polarization microstrip antenna array based on the SIW technology has the advantages of low section, light weight, high precision and low cost.

The invention relates to a design technology of a horizontal polarization omnidirectional antenna with an adjustable lobe elevation angle, which solves the problems of the traditional horizontal polarization omnidirectional antenna, such as fixed pitch face wave beam directing, low antenna gain and high impedance matching difficulty. The antenna comprises a top-end reflection plate, a micro-strip antenna, a bottom-end reflection plate and supporting medium columns, wherein the micro-strip antenna consists of four arc-shaped micro-strip dipoles which are arranged along the circumstance; metal plates on the top end and the bottom end are arranged on the upper side and the lower side of the micro-strip antenna; the sizes of the upper metal plate and the lower metal plate can change the directing of the pitch face wave beam; the micro-strip antenna is clamped between flanges of the medium columns on two sides and is fixed by bolts; and a hole is punched at the middle part of the lower metal plate and a feed cable can pass through the hole. The standing wave of the antenna is less than 1.5 within 10% of relative frequency band, gain in an azimuth plane is higher than 2.3dB, gain fluctuation is less than 1dB, a cross polarization level is lower than -30dB, and wave beam directing is adjustable. According to the design technology, the antenna gain, the impedance matching, the cross polarization performance and the anti-interference performance of the top end and the bottom end of the antenna are improved. The design technology is suitable for the fields, such as broadcasting communication and electronic countermeasure.

The invention relates to an SIC technology-based four-element dual-polarization microstrip antenna array, which comprises six layers of printed circuit boards and metal supports (6), wherein the lowersurface of a top layer of printed circuit board (17) is printed with rectangular parasitic patches (1); the upper surface of a third layer of printed circuit board (16) is printed with rectangular main patches (2) and a main patch layer reflection plate (11); the upper surface of a fourth layer of printed circuit board (15) is printed with a vertical-polarization feeder line (3) and a ring (8); the upper surface of a fifth layer of printed circuit board (14) is printed with a grounding plate (4); cross gaps (9), circular openings (19) and circular openings (20) are etched on the grounding plate (4); a horizontal-polarization feeder line (5) and a strip line (10) are printed on the lower surface of the fifth layer of printed circuit board (14); and the lower surface of the bottom layer ofprinted circuit board (12) is provided with an antenna bottom reflection plate (13). The SIC technology-based four-element dual-polarization microstrip antenna array has the advantages of wider bandwidth, higher port isolation and lower cross polarization level.

The invention relates to a design method of a low-profile dual-polarized tile antenna unit adopting T-shaped microstrip feeding. The design method is characterized in that an antenna patch unit adopts a T-shaped microstrip line for coupled feeding, a feeding network and the patch unit are located in one layer, and two polarizing and feeding networks are arranged; and a parasitic unit is located just above an excitation unit. The antenna has capability of suppressing antenna system low-frequency signal interference, and has standing wave ratio smaller than 1.8 and cross polarization level smaller than -17dB in 20% relative bandwidth; and the T-shaped microstrip line is adopted for coupled feeding as well as is located in one plane with an antenna radiation unit, thus the thickness of the antenna unit is significantly reduced. The obtained antenna unit not only can be used as a unit of a tile type array antenna, but also can be independently used as a transceiver antenna of a polarization diversity system.

The invention discloses a time division-long term evolution (TD-LTE) dual-polarization radiation unit, which comprises symmetrical vibrator radiation arms, feed baluns and supporting arms, wherein the number of the symmetrical vibrator radiation arms is two pairs, and the two pairs of symmetrical vibrator radiation arms are distributed across; each pair of symmetrical vibrator radiation arms is fixed on a floor through the supporting arms respectively; and the number of the feed baluns is 2, one end of each feed balun is connected with one of the corresponding symmetrical vibrator radiation arm, and the other end of the feed balun is fixed at the bottom of the supporting arm of the other one of the corresponding symmetrical vibrator radiation arm. Because two pairs of symmetrical vibrators form an integrated structure, the dual-polarization radiation unit has electric properties such as high gain, wide working bandwidth, high isolation degree, low cross polarization level and the like.

The invention relates to a dual-band wave beam equalization side-fed offset cassegrain antenna and a realization method thereof. The antenna comprises four pairs of standard side-fed offset cassegrain antennas and each pair of antenna comprises a primary reflector, a secondary reflector and a feed source assembly, wherein the four pairs of the standard side-fed offset cassegrain antennas are in a standard form and are used for receiving and transmitting; each feed source assembly is formed by a plurality of sample strip forming light wall loudspeaker feed sources; each sample strip forming light wall loudspeaker feed source is formed by sequentially connecting a sample strip forming light wall loudspeaker, a square and circle transition, a circular polarizer, a square and square transition and an orthogonal mould coupler; a main lobe of a low-frequency emission directional diagram and a first lateral lobe of a high-frequency receiving directional diagram irradiate the reflectors; and a phase center of each feed source assembly is located on focus planes of the reflectors and points at the center of an equivalent reflection face. According to the dual-band wave beam equalization side-fed offset cassegrain antenna and the realization method thereof disclosed by the invention, an antenna receiving-transmitting directional diagram has the equal beam width; and the dual-band wave beam equalization side-fed offset cassegrain antenna has the advantages of simple structure, portability, easiness for designing, good performance, strong practical applicability and the like, and has the good same frequency interference resistance.

The feed source of the corrugated horn comprises a harmful harmonic mode suppresser, the corrugation groove mode converter with double-groove structure, the frequency change and angle change transition section with double-groove deep corrugation structure and the radiation section with double-groove deep corrugation structure. The corrugation groove mode converter combines the harmful harmonic suppresser and the annular loading groove as well as the straight groove so as to reach the purpose of restraining excitation of the harmful harmonic mode, lowering reflectino loss and dual-band joint use. The invention possesses the features of rotation symmetry of the radiation pattern in two discrete frequency ranges, low electrical level of the side lobe and cross polarization, low reflection loss and high gain.

The invention provides a transmit-receive dual-polarized and dual-band feed source for a parabolic antenna system, a luneberg lens antenna system and the like in satellite communication. The feed source works at Ku band, has a rotational symmetric directional diagram with adjustable lobe width, a cross polarization level which is less than -35dB, high radiation performance such as return loss and transmit-receive isolation, has a simple, small and exquisite structure and high practicality, and can flexibly meet different requirements of different antenna systems.

The invention discloses a dual-probe reverse phase feeding microstrip antenna, which comprises a first medium substrate, a second medium substrate and a ground level, wherein the first medium substrate is parallel to the ground level; the second medium substrate penetrates through the ground level vertically; the upper end of the second medium substrate is adjacent to the lower surface of the first medium substrate; the first medium substrate is provided with a microstrip patch; a first L-shaped probe strip and a second L-shaped probe strip are arranged symmetrically on the second medium substrate; the first L-shaped probe strip is formed by connecting a first coupling exciting strip which is parallel to the ground level and a first feeding strip which is vertical to the ground level; the second medium substrate is partitioned into an upper area and a lower area by an intersection line between the second medium substrate and the ground level; an area of the second medium substrate, which is positioned on the lower side of the intersection line, is provided with a microstrip power divider in two penny; one path of the microstrip power divider is connected with the first feeding strip through an inverter; and the other path of the microstrip power divider is directly connected with the second feeding strip.

The invention discloses a Ka-band high-power linearly-circularly polarized converter, and belongs to the technical field of high-power millimeter waves. The converter comprises a supporting structure, a fixing circular ring, an installing stop ring and a metal circular plate. Polarization conversion is realized by the rectangular hole structures periodically arranged on the metal circular plate. The structure has the advantages of being simple in design principle, convenient to process, wide in work frequency band and low in cross polarization level. The rectangular holes are arranged in an isosceles triangle so that the relative space between the units is enabled to be reduced and the influence of grating lobes can be effectively reduced; and quarter arc segments are used as the four corners of the rectangular unit holes so that the local field intensity of the edges and the corners can be reduced, the power capacity of the device can be enhanced and the high-power work requirement can be met. The inclined angle of the metal circular plate and the polarization direction of the incident linearly polarized waves can be adjusted so that selection and switching of left-hand circular polarization and right-hand circular polarization of the emergent waves can be realized; meanwhile, the converter also has the advantages of low transmission loss and great heat radiation.

The invention discloses a circularly polarized differential dielectric resonator array antenna for use in the field of wireless communication. The circularly polarized differential dielectric resonator array antenna comprises a feed structure and four radiating elements. The radiating elements are differential feed circularly polarized rectangular dielectric resonators. The four radiating elements are successively rotated by 0 degree, 90 degrees, 180 degrees and 270 degrees around the center of the array. The feed structure is a parallel sequential rotation feed network and has the same element feed phase and element rotation angle. The array antenna has an impedance bandwidth of 12.1% (25.5 GHz to 28.8 GHz) and a 3dB axial ratio bandwidth of 11.1% (25.95 GHz to 29 GHz). The principal polarization of the array antenna is left-handed circular polarization, and the cross-polarization of the array antenna is right-handed circular polarization. The cross-polarization level on both radiating surfaces can reach below -15dB in a 3dB beam bandwidth. The antenna of the invention has good circular polarization characteristics, a low cross-polarization level, and can be directly integrated with an RF front-end differential circuit because of its differential feed characteristics.

The invention discloses a broadband substrate integrated waveguide (SIW) back cavity slot antenna array adopting an L-shaped slot unit. The antenna array comprises a parallel feed type power divisionnetwork and a plurality of SIW back cavity slot antenna units, each antenna unit is mainly composed of an SIW rectangular resonant cavity and two pairs of L-shaped slot pairs rotationally symmetricalrelative to the center of the resonant cavity, and two L-shaped slots of each of L-shaped slot pairs are arranged face to face. By designing the positions of metalized through holes and metalized blind holes, each antenna unit forms a rectangular SIW isolation cavity with an open long side in a dielectric bonding layer, and the influence of an electromagnetic field leaked in the bonding layer on an antenna array directional diagram and gain is remarkably reduced. The antenna array realized by the invention has the characteristics of wide directional diagram bandwidth, flat in-band gain, narrowbeams in both an azimuth plane and a pitch plane, and low cross polarization electrical level.

The invention discloses a broadband cavity-backed planar slot array antenna based on a dielectric integrated waveguide, and belongs to the technical field of antennas. The antenna is composed of a radiation structure and a feed structure. The radiation structure is composed of two or four radiation units, and each radiation unit achieves radiation of electromagnetic waves by forming slot grooves in an upper-layer metal plate of a dielectric integrated waveguide. And the feed structure adopts an equal-amplitude same-phase microstrip line power divider. In order to improve the impedance bandwidth and the radiation gain, the radiation unit is provided with a left-right symmetrical V-shaped slot and an inverted V-shaped slot. The working frequency of the antenna provided by the invention is 9.0 GHz. The relative bandwidth of the 2-unit array antenna is 25.6%, and the gain of the 2-unit array antenna is 10.1 dBi. The relative bandwidth of the 4-unit array antenna is 31.3%, and the gain of the 4-unit array antenna is 12.9 dBi. The antenna has the advantages in performance such as frequency band and gain, and is expected to be widely applied to wireless communication and radar systems.

The invention discloses a linear polarization single pulse planar slot antenna, and belongs to the antenna technical field; the antenna comprises a radiation slot feed layer and a single pulse feed network; the surface of a single layer radial line waveguide is provided with a radiation slot array; each ring of the radiation slot array is to arrange one slot to encircle the radial line waveguide center in one quadrant waveguide according to conventional linear polarization RLSA slot arrangement rules, and enables one slot to be symmetrical in up-down and left-right direction so as to obtain slots in four quadrant waveguides of the same ring, thus controlling the feed network to change feed phases, and realizing linear polarization and single pulse. The feed structure is simple in structure, can prevent a massive feed network structure, is small in loss, and high in antenna efficiency. Compared with a conventional linear polarization RLSA structure, the antenna can realize linear polarization and single pulse in the same time, and employs single slot to be a linear polarization radiation unit so as to improve the refection coefficient; the linear polarization single pulse planar slot antenna has a stable radiation pattern in a work frequency band, has an extreme low cross polarization level, and has an excellent return loss.

The present invention discloses a compact broadband omnidirectional vertically polarized antenna. The antenna comprises a top-layer metal radiating sheet, a lower-layer dielectric plate, a middle metal column and a plurality of shorting-circuit metal columns. The lower-layer dielectric plate is provided with a hollow region. An upper end of the middle metal column is connected with the top-layer metal radiating sheet. A lower end of the middle metal column extends towards the hollow region. Upper ends of the shorting-circuit metal columns are connected with the top-layer metal radiating sheet.Lower ends of the shorting-circuit metal columns are connected with an upper surface of the lower-layer dielectric plate. After a microstrip feeder penetrates through the hollow region of the lower-layer dielectric plate, the microstrip feeder is connected with the lower end of the middle metal column. The present application proposes a method for introducing a capacitive reactance load into a floor slit, so that an antenna obtains a new resonant mode, and forms double-resonance operation in combination with a resonant mode obtained by introducing an inductive reactance load into a short-circuit metal bar, so that the antenna obtains good omnidirectional vertically polarized radiation characteristics within a wide range.

This invention discloses a dielectric substrate integrated waveguide slit array antenna used in radio communication, radar, electronic navigation and ECM etc including a dielectric substrate board with metallic foils on the positive and negative sides, a slit array and a microstrip power splitter are connected and etched on one side of the metallic foil set with inter-connected metallized through holes queued in 'U' enclosing the slit array.

The invention relates to a dual-band wave beam equalization side-fed offset cassegrain antenna and a realization method thereof. The antenna comprises four pairs of standard side-fed offset cassegrain antennas and each pair of antenna comprises a primary reflector, a secondary reflector and a feed source assembly, wherein the four pairs of the standard side-fed offset cassegrain antennas are in a standard form and are used for receiving and transmitting; each feed source assembly is formed by a plurality of sample strip forming light wall loudspeaker feed sources; each sample strip forming light wall loudspeaker feed source is formed by sequentially connecting a sample strip forming light wall loudspeaker, a square and circle transition, a circular polarizer, a square and square transition and an orthogonal mould coupler; a main lobe of a low-frequency emission directional diagram and a first lateral lobe of a high-frequency receiving directional diagram irradiate the reflectors; and a phase center of each feed source assembly is located on focus planes of the reflectors and points at the center of an equivalent reflection face. According to the dual-band wave beam equalization side-fed offset cassegrain antenna and the realization method thereof disclosed by the invention, an antenna receiving-transmitting directional diagram has the equal beam width; and the dual-band wave beam equalization side-fed offset cassegrain antenna has the advantages of simple structure, portability, easiness for designing, good performance, strong practical applicability and the like, and has the good same frequency interference resistance.

The invention discloses a wide-angle scanning dual-polarization dipole antenna, and belongs to the technical field of antennas. The wide-angle scanning dual-polarization dipole antenna comprises a first metal arm, an antenna support column, a second metal arm and a feed balun, wherein the first metal arm is located at the top of the antenna, and is used for improving the impedance fluctuation of the antenna during large-angle scanning; and the feed balun is located at the bottom of the antenna and is used for converting the unbalanced feed input by a coaxial line into a balanced feed. According to the antenna, the impedance matching during large-angle scanning of the antenna is greatly improved, and the antenna wide-angle scanning performance is effectively improved; meanwhile, the antennahas high cross polarization performance; and finally, due to the fact that both the metal dipole arm and the top metal arm adopt longitudinal blade-shaped bending structures, the cross section is small, snow and rain are not prone to being accumulated, the influence of accumulated snow and accumulated rain and the like on the performance and the service life of the antenna is greatly reduced, andthe antenna can be well suitable for severe weather conditions such as strong rainfall, strong snowfall and the like.

The invention discloses a dual-polarization two-dimensional multi-beam antenna array. The antenna array comprises an upper dielectric plate and a lower dielectric plate. The antenna array aperture adopting differential feeding and the horizontal polarization feed network are located on the upper dielectric plate. The vertical polarization feed network is located on the lower dielectric plate, thehorizontal polarization feed network and the vertical polarization feed network are vertically arranged, an excitation port of the horizontal polarization feed network is a horizontal polarization differential excitation pair, and an excitation port of the vertical polarization feed network is a vertical polarization differential excitation pair; the aperture of the antenna array comprises an SIWcavity, 2*2 antenna units are etched in the SIW cavity, and each antenna unit is composed of a microstrip patch and a grounding through hole short-circuited with the lower dielectric plate. The antenna array disclosed by the invention adopts differential feeding, and an antenna pattern has very low cross polarization level and port isolation during scanning, so that the polarization diversity performance of the antenna array can be improved, and the signal-to-noise ratio of a system is reduced.

The invention relates to an antenna with high isolation and low cross polarization level, a base station and a terminal. The antenna comprises at least one radiation layer, a feed layer and an aperture coupling layer arranged between the radiation layer and the feed layer, and the aperture coupling layer comprises a metal sheet. The metal sheet is provided with a first feed gap, a second feed gap and a middle gap, and the middle gap is located between the first feed gap and the second feed gap and located in a weak electric field area of the metal sheet. By arranging the middle gap between the first feed gap and the second feed gap of the metal sheet, the boundary condition of the antenna can be changed under the condition that the radiation electric field of the antenna is not changed due to the existence of the middle gap, so that on one hand, the current in the cross polarization direction generated on the antenna is weakened, and the cross polarization level is reduced; and on the other hand, the energy coupling phenomenon of the antenna is effectively weakened, so that the isolation of the antenna is remarkably improved.

The invention discloses a dual-polarization base station antenna based on shared symmetrical array arms, the antenna comprises a dielectric plate, four microstrip feeder wires are printed on the top surface of the dielectric plate, the four microstrip feeder wires are respectively arranged along two diagonal lines of the dielectric plate, four shared array arms are printed on the bottom surface ofthe media plate, the four shared array sub-arms are respectively located at positions opposite to the four microstrip feed wires on the bottom surface of the dielectric plate, a microstrip feed wireand an opposite shared array sub-arm are connected with one end of a coaxial cable, and an antenna reflector plate in the horizontal direction is arranged directly below the dielectric plate. The antenna disclosed by the invention shares one polarized symmetrical array sub-arm with another orthogonally polarized symmetrical array sub-arm, realizes two radiation with different polarizations respectively, can greatly reduce antenna radiator size and antenna profile, and has the advantages of stable frequency bandwidth, gain and wave lobe width, etc.

The invention discloses a broadband low cross polarization microstrip patch phased-array antenna unit, and belongs to the technical field of microwave antennas. The antenna unit is composed of five layers of dielectric substrates, and the reflection floor is laid on the lower surface of the first dielectric substrate. The slot floor is laid on the lower surface of the second dielectric substrate, the feed microstrip line conduction band is laid on the upper surface of the second dielectric substrate, the square driving patch is laid on the upper surface of the third dielectric substrate, the square parasitic patch is laid on the upper surface of the fifth dielectric substrate, and the central area of the fourth dielectric substrate is hollowed out. The first support is used for supporting the fifth dielectric substrate; metal blind holes are formed in the periphery of the first dielectric substrate and used for connecting the reflection floor and the slot floor to form a closed metal cavity, metal through holes are designed in the periphery of the antenna unit to penetrate through all the dielectric substrates, and equivalent metal walls are formed around patches to block propagation of surface waves. According to the invention, the broadband, low-cross-polarization and wide-scanning-angle microstrip patch phased-array antenna unit with a multilayer structure can be obtained.

A mobile submillimeter-wave telescope is composed of antenna, signal receiving system, control system and signal processing system. It features its off-axis Cassegrin antenna, small GPS receiver and modular design.

The feed source of the corrugated horn comprises a harmful harmonic mode suppresser, the corrugation groove mode converter with double-groove structure, the frequency change and angle change transition section with double-groove deep corrugation structure and the radiation section with double-groove deep corrugation structure. The corrugation groove mode converter combines the harmful harmonic suppresser and the annular loading groove as well as the straight groove so as to reach the purpose of restraining excitation of the harmful harmonic mode, lowering reflectino loss and dual-band joint use. The invention possesses the features of rotation symmetry of the radiation pattern in two discrete frequency ranges, low electrical level of the side lobe and cross polarization, low reflection loss and high gain.

The invention discloses a dual-polarized microstrip slot antenna and an electronic product. The dual-polarized microstrip slot antenna comprises a radiation patch, a grounding plate, a first polarized feeder line and a second polarized feeder line, wherein the radiation patch is a main radiator of the antenna, and the size of the radiation patch can be determined according to the center frequency of the antenna; a gap is formed in the grounding plate and is used for gap coupling feeding; the first polarization feeder is located between the radiation patch and the grounding plate and is used for generating electromagnetic coupling with the grounding plate to form excitation and radiating electromagnetic waves to the radiation patch; the second polarization feeder line and the first polarization feeder line are spatially orthogonal and are arranged in a layered manner, the grounding plate is located between the first polarization feeder line and the second polarization feeder line, and the second polarization feeder line radiates electromagnetic waves to the direction of the radiation patch through a gap formed in the grounding plate. According to the invention, a mixed feed technology combining gap feed and proximity coupling feed is adopted, and a structural design of layered arrangement of the polarized feeder lines is matched, so that the bandwidth of the antenna is expanded, and meanwhile, the cross polarization level is reduced.

The invention discloses a dielectric substrate integrated waveguide slot array antenna used for electronic equipment such as wireless communication, radar, electronic navigation and electronic countermeasures. The metal foil on one side is etched with a slot array and a microstrip power divider, the slot array unit is connected to the microstrip power divider, and a through hole is provided on the dielectric substrate board and the metal foil, and the through hole is Metallized through holes, the metallized through holes are arranged in a "U" shape, and the metallized through holes arranged in a "U" shape surround the slot array unit; the present invention has the following advantages: easy to produce, especially easy to mass produce and The manufacturing precision is high and the performance of the antenna can be improved.

The invention discloses a broadband cavity-backed planar slot array antenna based on a dielectric integrated waveguide, which belongs to the technical field of antennas. The antenna is composed of a radiating structure and a feeding structure. The radiating structure is composed of 2 or 4 radiating units, and each radiating unit realizes the radiation of electromagnetic waves by opening slots on the upper metal plate of the dielectric integrated waveguide. The feed structure adopts microstrip line power divider with equal amplitude and same phase. In order to improve the impedance bandwidth and radiation gain, the radiation unit is provided with left-right symmetrical "亣"-shaped slots and inverted "eight"-shaped slots. The operating frequency of the antenna of the present invention is 9.0GHz. The 2-element array antenna achieves a relative bandwidth of 25.6%, and a gain of 10.1dBi. The 4-element array antenna achieves a relative bandwidth of 31.3%, and a gain of 12.9dBi. The invention has advantages in performance such as frequency band and gain, and is expected to be widely used in wireless communication and radar systems.

The invention discloses a broadband substrate integrated waveguide (SIW) back cavity slot antenna array adopting an L-shaped slot unit. The antenna array comprises a parallel feed type power divisionnetwork and a plurality of SIW back cavity slot antenna units, each antenna unit is mainly composed of an SIW rectangular resonant cavity and two pairs of L-shaped slot pairs rotationally symmetricalrelative to the center of the resonant cavity, and two L-shaped slots of each of L-shaped slot pairs are arranged face to face. By designing the positions of metalized through holes and metalized blind holes, each antenna unit forms a rectangular SIW isolation cavity with an open long side in a dielectric bonding layer, and the influence of an electromagnetic field leaked in the bonding layer on an antenna array directional diagram and gain is remarkably reduced. The antenna array realized by the invention has the characteristics of wide directional diagram bandwidth, flat in-band gain, narrowbeams in both an azimuth plane and a pitch plane, and low cross polarization electrical level.

The invention discloses a wide-angle scanning dual-polarization dipole antenna, which belongs to the technical field of antennas and includes a first metal arm, an antenna support column, a second metal arm and a feed balun, and the first metal arm is located at the antenna The top of the antenna is used to improve the impedance fluctuation of the antenna when scanning at a large angle. The feed balun is located at the bottom of the antenna and is used to convert the unbalanced feed of the coaxial line input into a balanced feed. The invention greatly improves the impedance matching when the antenna scans at a large angle, and effectively improves the performance of the wide-angle scan of the antenna; at the same time, the antenna has good cross-polarization performance; finally, since both the metal dipole arm and the top metal arm are made of Longitudinal blade-shaped bending structure, its cross-section is extremely small, it is not easy to accumulate snow and rain, which greatly reduces the impact of snow and rain on the performance and life of the antenna, and can be well applied to heavy rainfall and heavy snowfall, etc. inclement weather conditions.