51results about How to "Improve polarization isolation" patented technology

The invention discloses a millimeter-wave four-polarized frequency scanning antenna, and relates to a multi-polarized frequency scanning antenna capable of being applied in fields such as millimeter-wave wireless communication system, radar detection and the like. An upper-layer metal copper-clad surface (1) and a lower-layer metal copper-clad surface (2) of the antenna are positioned on a front side and a back side of a dielectric substrate (3) respectively; and a metalized through hole (4) pass through the dielectric substrate (3) and is connected with the upper-layer metal copper-clad surface (1) and the lower-layer metal copper-clad surface (2) to form a substrate integrated waveguide 90 DEG directional coupler (5), a substrate integrated waveguide 16-groove 45 DEG slot leaky-wave antenna (6), a first clearance channel (61), a substrate integrated waveguide 16-groove -45 DEG slot leaky-wave antenna (7), and a second clearance channel (71). The whole antenna adopts substrate integrated waveguide for design, can be directly integrated with a radio-frequency circuit, and has the characteristics of low consumption, low cost, easy mass production and the like.

The invention provides a low section compact dual-band dual-polarization common aperture microstrip antenna which is formed by two layers of double-face copper clad microwave dielectric plates. The needed double-frequency antenna array and Ku band antenna feed network are formed on the upper surface of the upper layer dielectric plate through etching process, and an L type coupling slot is arranged on a grounded plate at the lower surface of the upper layer dielectric plate. A Ka band antenna feed network is at the lower layer of the lower layer dielectric plate, and the antenna is subjected to coupled feeding through the slot. Two frequencies of the antenna coverage are a Ka band and a Ku band. According to the antenna, through the reasonable array layout, a Ka band antenna and a Ku band antenna are in coplanar nested placement in a same aperture, the structure is compact, the feed network of the antenna is hierarchically designed, and the wiring space is relatively abundant. The antenna can be applied to a satellite communication terminal of Ku and Ka bands.

The invention discloses a measurement calibration and polarimetric calibration device (BPARC) for a target bistatic radar cross section (RCS) and a measurement calibration method thereof. The device is a double-antenna active polarization radar calibration (PARC) device with a biaxial rotation control mechanism, can simultaneously solve the problems of target bistatic RCS calibration and target bistatic polarization scattering matrix measurement calibration under the bistatic scattering measurement condition. As the bistatic RCS measurement calibration device, the BPARC can overcome the defects of the existing technology and device and ensures the stability of an RCS calibration value under different bistatic angles. As the polarimetric calibration device for bistatic polarization scattering matrix measurement, the BPARC retains all advantages of the existing single-station polarimetric calibration PARC device and also can be used for bistatic polarimetric calibration. The functions of bistatic RCS calibration and bistatic polarimetric calibration of the traditional PARC are increased.

The invention provides a calibration method of accurately testing a polarization component of two perpendicular lines of an antenna. Through the calibration method, the calibration for dual polarizing antenna channel amplitude phase consistency and the improvement of cross polarization performance are achieved. The calibration method of accurately testing the polarization component of the two perpendicular lines of the antenna utilizes the following technical scheme to achieve that a dual polarizing antenna channel is connected with a vector network analyzer and a rotary signal-sending linear polarization auxiliary calibration antenna, two lines of output of a dual polarization probe of a receiving end is transmitted to the vector network analyzer to acquire two time-dependent plural signal curves of polarization channels, and the phase equalization, the amplitude consistency and the cross polarization isolation of the two polarization channels are read according to the two curves. The calibration method of accurately testing the polarization component of the two perpendicular lines of the antenna can be applied to a commonly used dual polarization open waveguide in near-field test calibration, or a commonly used dual polarization antenna in an antenna far-field test, or other dual polarization antennas in application.

The invention discloses a dual polarization array antenna with high polarized isolation; the dual polarization array antenna comprises two radiation pasters, a [pi] type mutual coupling suppression structure arranged between the two radiation pasters, a parasitic coupled floor and a grounding capacitive loading ring; the grounding capacitive loading ring is vertically arranged on the parasitic coupled floor; the [pi] type mutual coupling suppression structure and the grounding capacitive loading ring are mutually vertical to each other. The antenna adds the [pi] type mutual coupling suppression structure between the array elements, thus effectively improving the antenna polarized isolation, and keeping other performance of the antenna to be well.

The invention discloses a feeding network layer and an antenna system. The feeding network layer comprises two feeding networks in mutual mirror symmetry, and each feeding network comprises a feeding input port, a Wilkinson power divider, a slow-wave line structure, aSchiffman phase shifter, and a branch-line directional coupler. The antenna system comprises the feeding network layer, a second dielectric substrate layer, a metal ground layer, a first dielectric substrate layer, and a radiation layer laminated in sequence from bottom to top. The invention also discloses a method for generating four polarization modes of the antenna system, wherein the four polarization modes comprise left-hand circular polarization, right-hand circular polarization, +45-degree linear polarization, and -45-degree linear polarization. According to the feeding network layer, the antenna system, and the method, the design is ingenious, the structure is simple, the defects of unstable structure and high cost caused by realization of the quadri-polarization antenna through change of the physical direction of an antenna oscillator and loading of a radio frequency switch are overcome, and requirements of simple machining of the antenna and easy integration are guaranteed.

The invention discloses an L-band broadband dual-polarized electromagnetic dipole antenna. The antenna comprises four electromagnetic dipole arms, two Gamma-shaped strip feed probes, a horizon reflecting surface, and a directing disc. The four electromagnetic dipole arms, a first Gamma-shaped strip feed probe and a second Gamma-shaped strip feed probe are disposed between the horizon reflecting surface and the directing disc. The first Gamma-shaped strip feed probe and the second Gamma-shaped strip feed probe are arranged crosswise, with the included angle being 90 degrees. The four electromagnetic dipole arms are uniformly arranged around the two Gamma-shaped strip feed probes. A first electromagnetic dipole arm and a third electromagnetic dipole arm constitute a pair of electromagnetic dipole arms. A second electromagnetic dipole arm and a fourth electromagnetic dipole arm constitute a pair of electromagnetic dipole arms. The two electromagnetic dipole arms in each pair are in the same line. The lines where the two pairs of electromagnetic dipole arms are located are perpendicular to each other. The antenna of the invention has good reception performance in a wide frequency band.

The invention relates to a dual-polarization indoor omni-directional ceiling antenna of a long-term evolution mobile communication system, wherein a vertical polarization cone antenna and a three-element magnetic ring antenna are arranged on a chassis, and a horizontal polarization slot antenna is cylindrically arranged above the vertical polarization cone antenna; the vertical polarization cone antenna adopts cone transition of polarized waves to enable main resistance to gradually change to 50 omega to realize ultra wide band, wherein S11 is less than -14dB; the horizontal polarization antenna adopts longitudinal joints as an excitation source, and four longitudinal joints are distributed on the cylindrical surface at equal intervals; the three-element magnetic ring antenna is distributed in a three-ring manner at equal angle of 120 degrees, wherein the magnetic ring size 1+s+g is approximately equal to Lambda to form resonance shape, so that the three-element magnetic ring antenna has maximum driving radiation. The dual-polarization indoor omni-directional ceiling antenna is used for improving high-flow signal transmission efficiency and frequency spectrum utilization rate in four-generation mobile communication under the condition of not increasing the bandwidth. The dual-polarization indoor omni-directional ceiling antenna has dual-polarization and dual-fluidization functions, can generate dual-polarization gain which is improved by about 2dB compared with that of a single-polarization antenna, improves the indoor multipath fading phenomenon and increases a networking scheme for indoor coverage.

The invention discloses a dual-polarization radiating unit and an array antenna provided with the dual-polarization radiating unit, the main technical problem to be solved is the problem of mutual coupling between arrays in the prior art. The dual-polarization radiating element includes a radiation device, which comprises array arms arranged symmetrically on a first PCB substrate, and the array arms are connected with a decoupling circuit by a direct feed mode or a coupling mode. The technical scheme that the effective length of the decoupling circuit is 0.02 to 0.1 wavelength solves the problem well and can be used for an array antenna.

A coupling device is provided, including a substrate, a ground element, a first feed conductor and a second feed conductor. The substrate includes a first surface and a second surface. The ground element is disposed on the second surface, wherein the ground element includes a first portion, a second portion, an annular groove and a feed slot, the annular groove is located between the first portion and the second portion, enclosing the first portion, and a first end of the feed slot is connected to the annular groove. The first feed conductor is disposed on the first surface corresponding to the annular groove, wherein the first feed conductor couples the ground element to feed a current signal. The second feed conductor is disposed on the first surface corresponding to the feed slot, wherein second feed conductor couples the feed slot to feed a magnetic fluid signal.

The invention discloses an antenna radiation unit applied to a 5G system, and relates to the 5G technical field. The antenna radiation unit comprises an upper layer dielectric body, a lower layer dielectric body, a radiation patch, a parasitic patch, a plurality of feeding probes, a metal ground plane and a feeding network. The upper layer dielectric body is coaxially arranged at the upper end ofthe lower layer dielectric body, the lower end of the lower layer dielectric body is connected with a metal grounding plate, a plurality of feeding probes are axially symmetrically arranged on the outer side of the lower layer dielectric body, and the feeding probes are positioned between the metal grounding plate and the radiation patch and are kept direct current disconnected from the metal grounding plate; The feeding network is arranged at the lower end of the metal ground plane and feeds the feeding probe through the pins. The parasitic patch is arranged on the upper surface of the uppermedium body, and the radiation patch is arranged on the upper surface of the lower medium body. The radiating element body can be formed integrally, has high machining precision, simple structure andis easy to be assembled in the later stage. At the same time, it can achieve bipolarization, broadband, high gain, high cross-polarization discrimination and other electrical characteristics.

The invention provides a base station array antenna applied to an active antenna system. The base station array antenna comprises a medium substrate, a feed network arranged in front of the medium substrate, a grooving floor arranged on the reverse side of the medium substrate, and an intersecting structure in a feed network. A plurality of cross-shaped ring grooves are etched in the grooving floor. A metal baffle board is arranged below the medium substrate. The grooving floor and the metal baffle board are connected through a copper column. By the utilization of the cross-shaped grooves, two kinds of mutual orthogonal polarization and the dual-polarization characteristic of an array are achieved, and the copper column is used for fixing the medium substrate and the baffle board so that the structure can be stable, and has the function of unit isolation. Sixty four units and one hundred and twenty eight ports are adopted for independent feed, and therefore scanning of beams in the x dimension and the y dimension can be achieved. The base station array antenna can cover two common frequency bands of LTE, the isolation degree between the two kinds of polarization within the work frequency bands is high, and the coupling degree among the units is low. Meanwhile, the array antenna is simple in structure, a main body part is achieved only through one circuit board, manufacturing and processing are convenient, and the cost is low.

The invention discloses a broadband dual-polarized micro-strip antenna sub-array with filtering and calibration functions, which comprises a radiation layer, a paper honeycomb supporting layer and a functional layer. The functional layer comprises an upper printing plate, a lower printing plate and a lower metal surface. An upper metal surface is arranged on the upper surface of the upper printingplate and etched with H-shaped slots, first H-shaped slots are arranged along the vertical direction of the upper metal surface, and second H-shaped slots are arranged along the horizontal direction.A polarization feed network is arranged on the lower printing plate and comprises T-shaped strip lines and characteristic strip lines, the polarization feed network with the T-shaped strip lines perpendicular to the first H-shaped slots is recorded as a horizontal polarization feed network, and the polarization feed network with the T-shaped strip lines perpendicular to the second H-shaped slotsis recorded as a vertical polarization feed network. Metalized via holes are formed in the lower metal surface, penetrate through the lower printing plate and are symmetrically distributed in the twosides of the polarization feed network. Through the technical scheme in the invention, a dual-polarized broadband micro-strip antenna sub-array with power distribution, filtering and calibration functions is realized.

The invention discloses a single reflecting surface compact range device of high cross polarization isolation. The device is mainly composed of a reflecting surface of a single reflecting surface compact range, a feed source and a polarization grid. The feed source illuminates the precise reflecting surface of the single reflecting surface compact range and beforehand collimates and corrects spherical waves into planar waves. To lower shielding of the feed source, an offset feed structure is adopted in geometric layout, while the offset feed layout is the main reason of large cross polarization. The polarization grid is arranged in front of a planar wave silent area of the single reflecting surface compact range, and a silent area range is subjected to polarization filtering and gating, wherein the polarization states of the feed source and the polarization grid are controlled by respective controllers. Polarization and gating of the polarization grid have the advantages of wideband working, can almost completely reflect the polarization component parallel to polarization grid silk, almost completely transmit the polarization component perpendicular to the polarization grid silk and improve the polarization isolation of the single reflecting surface compact range to a great extent with the cost of introducing very small insertion loss. The engineering achievability of compact range system design is improved, and control over the dynamic range of a radio frequency system is improved.

The invention discloses a dual-band anisotropic coded supersurface with co-aperture design. The basic unit structure of the supersurface comprises a right-angle metal structure (1), a cross-shaped metal structure (2), a dielectric layer (3) and a metal back plate (4). Wherein the plane of the dielectric layer (3) is square, a cross-shaped metal structure (2) is arranged in the center of the uppersurface thereof, a right-angle structure (1) is respectively arranged at four corners of the upper surface thereof, and a metal back plate (4) is arranged in the lower surface thereof. The supersurface comprises more than one sub-cell array, the sub-cell array is composed of M * N basic cell structure, M and N are non-zero positive integers; The subunit array is arranged on a two-dimensional planeaccording to a corresponding digital coding matrix, and has different electromagnetic responses under the illumination of incident waves with different frequencies and polarizations. The dual-band anisotropic coded supersurface with co-aperture design has the advantages of simple structure and easy machining, and the same super surface can realize multiple functions independently.

The invention discloses a broadband collinear slot waveguide slot antenna, and belongs to the technical field of microwave antennas. The antenna comprises a waveguide coaxial converter, a one-to-two feed waveguide and a radiation waveguide. The one-to-two feed waveguide and the radiation waveguide are symmetrically nested and combined and are separated by a common common wall; the waveguide coaxial converter is located in the center of the lower side of the one-to-two feed waveguide, and isolation walls are arranged at the two ends of the one-to-two feed waveguide and the radiation waveguide and the joint of the radiation waveguide and the waveguide coaxial converter and used for forming a closed waveguide cavity. A plurality of radiation slots are formed in the top of the radiation waveguide along the center line of the wide edge direction, the radiation slots are located on the same straight line, and disturbance blocks which are distributed alternately are arranged in a waveguide cavity of the wave radiation waveguide near the radiation slots. The broadband collinear slot waveguide slot antenna provided by the invention is wide in working bandwidth, good in cross polarization performance and not easy to generate parasitic side lobes.

The invention provides a high isolation dual polarization decoupling anti-interference antenna array. The two sides of a lower layer dielectric substrate are coated with copper; a lower layer feed network consists of a 180-degree power division phase-shift network and a zero-phase feeder, and the input end is connected to radio frequency cables; a single side of an upper layer dielectric substrateis coated with the copper, and the upper surface is an upper layer radiation patch; one ends of feed probes are welded with three output ports of the lower layer feed network of the lower layer dielectric substrate, and the other ends of the feed probes are welded with the upper layer radiation patch of the upper layer dielectric substrate; two dual polarized antenna array elements and multiple dielectric wave absorbers are fixed on an antenna base plate; and the multiple dielectric wave absorbers are equidistantly distributed on the two sides which take the center connecting line of the twodual polarized antenna array elements as an axis. Thus, good polarization isolation can be obtained; and abilities to resist interference in three different directions can be realized by adopting a space-time adaptive anti-interference algorithm, so that the size of an anti-interference antenna array surface can be greatly reduced, and the food electrical performance of the antenna array elementscan be guaranteed.

The invention discloses a multi-polarization digital beam forming antenna and provides an antenna which can be used for achieving multi-target complete-polarization beam, can be adaptive to polarization interference resistance and can be used for achieving airspace coverage. The multi-polarization digital beam forming antenna is implemented according to the following technical scheme that two dipole antennas are mutually orthogonal to form a polarization orthogonal antenna unit, airspace instantaneous coverage of complete-polarization multiple beams in four directions is achieved by the two orthogonal dipole antennas combined with digital beam formation, an output vertical polarization signal and a horizontal polarization signal are sent to a radio-frequency pre-processing unit in two paths for radio-frequency pre-processing and then are sent to a variable-frequency signal unit for down-conversion to obtain a medium-frequency signal after amplification, digital beam formation is performed on the medium-frequency signal in a digital processing unit, and four paths of digital receiving beams of a vertical polarization beam, a horizontal polarization beam, a left-handed circular polarization beam and a right-handed circular polarization beam are respectively formed. By the multi-polarization digital beam forming antenna, the multi-target complete-polarization beam is completed byrelatively high interference-resistant capability, and the defects of channel saturation and insufficient receiving sensitivity are overcome.

The invention relates to a patch antenna, in particular to a double-fed dual-polarization microstrip antenna. The double-fed dual-polarization microstrip antenna comprises a dielectric substrate and a radiation patch arranged on the front face of the dielectric substrate, a geometric center of the radiation patch is coincided with that of the dielectric substrate 1, and the back face of the dielectric substrate is grounded. The radiation patch is in a shape of a toothed gear and comprises a central circular piece, four identical concentric arc pieces, four identical radial strip pieces and four teeth; the four concentric arc pieces and the four identical radial strip pieces are symmetrically arranged on the outer periphery of the central circular piece, and each concentric arc piece is connected with the central circular piece through one radial strip piece; the four teeth are uniformly distributed and orthogonally positioned at four ends of the radiation patch and are arranged at two ends of each concentric arc piece, two adjacent teeth of the four teeth are identical U-shaped teeth, and the other two adjacent teeth are identical broken teeth which are U-shaped teeth with radial middle openings serving as feed ports. The double-fed dual-polarization microstrip antenna is high in isolation and has excellent dual polarization characteristics.

The invention discloses an ultra-wideband dual-polarization radiation unit. The ultra-wideband dual-polarization radiation unit comprises a Balun structure, a radiation arm assembly, two feeding pieces, a plastic support piece and a parasitic radiation sheet, wherein the Balun structure is arranged at the bottom of the unit, the radiation arm assembly is arranged at a top end of the Balun structure, the parasitic radiation sheet is arranged above the radiation arm assembly by the plastic support piece, the two feeding pieces are inserted into the Balun structure, and top ends of the two feeding pieces are connected with the plastic support piece. The radiation unit employs a special loading structure and the parasitic radiation sheet and has the characteristics of wide impedance bandwidth,stable 3dB power lobe width, high grain and good polarization isolation.

The invention discloses a low-profile broadband dual-circularly-polarized phased-array antenna system, which belongs to the field of antennae, and comprises an antenna array, a radio frequency module and a control module; the antenna array comprises a plurality of antenna units, each antenna unit comprises a dielectric layer and a radiation layer, and a 90-degree bridge is arranged in each dielectric layer; double feeding points are arranged on the radiation layer and are connected with the 90-degree bridge through feeder lines; the radio frequency module is a tile type radio frequency module, and the radio frequency module comprises a plurality of radio frequency channels correspondingly connected with the antenna units; and the control module is used for controlling transceiving switching and polarization selection of the radio frequency module. The tile type radio frequency module is adopted, the connection structure is simple, and cost increase and system loss increase caused by a complex inter-board interconnection mode are avoided; the array is rotated to optimize the axial ratio characteristic; and the 90-degree bridge improves polarization isolation of the antennas when the left-hand circular polarization and the right-hand circular polarization are implemented at the same time, the influence between the two kinds of polarization is reduced, and the formed phased array antenna system is high in integration level, low in profile and low in loss.

The invention relates to a dual-band multi-polarization common-aperture waveguide slot antenna. Including L-band vertically polarized antennas, C-band vertically polarized antennas and C-band horizontally polarized antennas with equal lengths; and all of them are waveguide slot antennas; C-band vertically polarized antennas and C-band horizontally polarized antennas form a C-band dipole The polarized antenna array is located at the upper part, and the L-band vertically polarized antenna is located at the lower part; the L-band vertically polarized antenna, the C-band vertically polarized antenna and the C-band horizontally polarized antenna are all fed through the center of the antenna waveguide through a coaxial connector. Electrically, the coaxial connector and the waveguide form a 3dB power divider; realize the excitation of the L-band vertically polarized antenna, the C-band vertically polarized antenna and the C-band horizontally polarized antenna. The invention realizes sharing of multiple waveguide slot antennas on the same physical aperture area. Compared with the dual-band multi-polarization microstrip common-aperture antenna, the antenna has high efficiency, high polarization isolation, low cross polarization, and low power capacity. Great advantages.

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.

The embodiment of the invention discloses a dual-linear polarization feed source horn. The horn comprises a dual-groove corrugated horn unit, a square-to-circle transition waveguide and a quadrature coupler unit which are connected in sequence; the double-groove corrugated horn unit comprises a transmission waveguide and a double-groove feed source horn; the transmission waveguide is connected with the square-to-circle transition waveguide and the double-groove feed source horn; the quadrature coupler unit comprises a first input interface, a second input interface, a first Chebyshev transition waveguide connected with the first input interface, a first turning waveguide connected with the first Chebyshev transition waveguide through a first T-shaped junction, and a second Chebyshev transition waveguide connected with the second input interface. The second turning waveguide is connected with the second Chebyshev transition waveguide through a second T-shaped junction; and the first turning waveguide and the second turning waveguide are connected with the square-round transition waveguide through a cross rotary junction. The dual-linear polarization feed source horn is simple in structure, small in size and wide in working bandwidth, and has good cross polarization performance.

The embodiment of the present invention relates to the technical field of antennas, and specifically discloses a dual-polarized microstrip patch antenna, a packaged antenna, and a terminal device. The dual-polarized microstrip patch antenna includes a radiation patch, a reference ground, a first probe and a second probe, wherein: the radiation patch is provided with a first slot and a second slot, and the first slot and the second slot are Vertically intersecting, the first groove is symmetrical about the second groove, and the second groove is symmetrical about the first groove; the intersection point of the first groove and the second groove is located on the geometric center of the radiation patch; the radiation patch is set on one side of the reference ground; The first probe and the second probe are respectively connected to the radiation patch, the vertically orthogonal first groove and the second groove divide the radiation patch into four right-angled areas, and the first feed point and the second feed point are located at Two adjacent right-angled areas. The antenna in the above technical solution has a high degree of polarization isolation, and can be applied to application scenarios that require a higher degree of polarization isolation.

The invention discloses a millimeter-wave four-polarized frequency scanning antenna, and relates to a multi-polarized frequency scanning antenna capable of being applied in fields such as millimeter-wave wireless communication system, radar detection and the like. An upper-layer metal copper-clad surface (1) and a lower-layer metal copper-clad surface (2) of the antenna are positioned on a front side and a back side of a dielectric substrate (3) respectively; and a metalized through hole (4) pass through the dielectric substrate (3) and is connected with the upper-layer metal copper-clad surface (1) and the lower-layer metal copper-clad surface (2) to form a substrate integrated waveguide 90 DEG directional coupler (5), a substrate integrated waveguide 16-groove 45 DEG slot leaky-wave antenna (6), a first clearance channel (61), a substrate integrated waveguide 16-groove -45 DEG slot leaky-wave antenna (7), and a second clearance channel (71). The whole antenna adopts substrate integrated waveguide for design, can be directly integrated with a radio-frequency circuit, and has the characteristics of low consumption, low cost, easy mass production and the like.

The invention discloses a dual polarization array antenna with high polarized isolation; the dual polarization array antenna comprises two radiation pasters, a [pi] type mutual coupling suppression structure arranged between the two radiation pasters, a parasitic coupled floor and a grounding capacitive loading ring; the grounding capacitive loading ring is vertically arranged on the parasitic coupled floor; the [pi] type mutual coupling suppression structure and the grounding capacitive loading ring are mutually vertical to each other. The antenna adds the [pi] type mutual coupling suppression structure between the array elements, thus effectively improving the antenna polarized isolation, and keeping other performance of the antenna to be well.

The present disclosure relates to an antenna device and relates to the technical field of communication. The antenna device of the present disclosure includes: a first antenna unit, a second antenna unit, a third antenna unit and a main reflector are arranged at intervals along the central axis of the antenna device; the first antenna unit includes: a first pole working in a preset frequency band The oscillator and the oscillator reflector in the polarization direction; the second antenna unit includes: the oscillator working in the second polarization direction of the preset frequency band; the second polarization direction is perpendicular to the first polarization direction; the third antenna unit includes: working in An omnidirectional antenna dipole on at least one frequency band different from the preset frequency band; the main reflector acts on the signals sent by the second antenna unit and the third antenna unit.

The invention provides a base station array antenna applied to an active antenna system. The base station array antenna comprises a medium substrate, a feed network arranged in front of the medium substrate, a grooving floor arranged on the reverse side of the medium substrate, and an intersecting structure in a feed network. A plurality of cross-shaped ring grooves are etched in the grooving floor. A metal baffle board is arranged below the medium substrate. The grooving floor and the metal baffle board are connected through a copper column. By the utilization of the cross-shaped grooves, two kinds of mutual orthogonal polarization and the dual-polarization characteristic of an array are achieved, and the copper column is used for fixing the medium substrate and the baffle board so that the structure can be stable, and has the function of unit isolation. Sixty four units and one hundred and twenty eight ports are adopted for independent feed, and therefore scanning of beams in the x dimension and the y dimension can be achieved. The base station array antenna can cover two common frequency bands of LTE, the isolation degree between the two kinds of polarization within the work frequency bands is high, and the coupling degree among the units is low. Meanwhile, the array antenna is simple in structure, a main body part is achieved only through one circuit board, manufacturing and processing are convenient, and the cost is low.