35results about How to "Increased cross-polarization ratio" patented technology

The invention provides a dual-polarized vibrator unit, an antenna and a multi-frequency antenna array. The dual-polarized vibrator unit includes a radiator and a balun support portion for feeding of the radiator. The radiator includes a dielectric substrate, two pairs of dipole antenna arms being disposed on an upper surface of the dielectric substrate and in orthogonal arrangement of plus or minus 45 degrees, and at least one coupling metal strap disposed on a lower surface of the dielectric substrate. Current induction is generated between the dipole antenna arms and the coupling metal strap so that a current path is formed on the coupling metal strap. The vibrator unit and the antenna thereof in the invention can achieve the ultra-broadband, high gain, high efficiency, high cross polarization ratio and high front-ratio, high isolation, low profile and low coupling and is simple and beautiful in structure, easy in engineering realization and suitable for mass production, the production cost is reduced, and the electrical performance index meets the base station antenna industry standard.

The invention discloses a planar-broadband dual-polarization base station antenna and belongs to the field of mobile communication base station antennae. The planar-broadband dual-polarization base station antenna mainly solves the problems that an existing base station antenna is complex in structure and has difficulty in being integrated with other devices. The planar-broadband dual-polarization base station antenna comprises radiation oscillators (1), feed baluns (2), a baffle board (3), coaxial cables (4), supporting columns (5) and a dielectric material plate (6). The radiation oscillators (1) are dual-polarization planar oscillators at + / -45 degrees, and the feed baluns (2) are planar feed baluns at + / -45 degrees. The radiation oscillator at -45 degrees and the feed balun at +45 degrees are printed on the upper surface of the dielectric material plate (6), and the radiation oscillator at +45 degrees and the feed balun at -45 degrees are printed on the lower surface of the dielectric material plate (6). The dielectric material plate (6) is fixed to the square baffle board (3) through the supporting columns (5). According to the planar-broadband dual-polarization base station antenna, planarization of the radiation oscillators and the feed baluns are achieved, meanwhile, the structure of the baffle board is simplified, and a stable directional diagram characteristic can be obtained in broadband.

The invention provides a one-sixteenth-wavelength ultra-low-profile dual-polarized oscillator unit and a base station antenna including the same. The dual-polarized oscillator unit comprises an oscillator assembly and a balun support part for feeding of the oscillator assembly. The oscillator assembly consists of a dielectric substrate and a radiation sheet arranged at the dielectric substrate. The radiation sheet includes two pairs of dipole antenna arms and four metal straps. The two pairs of dipole antenna arms are arranged at the front side of the dielectric substrate in a positive-negative 45-degree orthogonal manner; one end, approaching the orthogonal center, of each dipole antenna arm is a feed end; and a terminal, far away from the orthogonal center, of each dipole antenna arm is provided with a protruding branch extending to one side of the adjacent dipole antenna. The four metal straps are distributed at the back side of the dielectric substrate and are located below the adjacent dipole antenna arms respectively; the metal straps have the same projection overlapped areas at each protruding branch; and the protruding branches and the metal straps are coupled to form a current path.

A differential feed dual-polarized oscillator assembly comprises a radiator and a pair of balun support arms orthogonally connected to the radiator in a differential double-feed way. The radiator comprises two pairs of oscillator arms orthogonal to each other at 45 degrees and two orthogonal center of the two pairs of oscillator arms is provided with a cross-shaped short circuit plate. The front of each balun support arm is provided with a mirror-symmetrical microstrip balun along the center. The mirror symmetrical microstrip balun forms a group of differential double-feed lines. The back surface of each balun support arm is provided with a mirror-symmetrical grounding metal layer along the center. The oscillator arms and the short circuit plate are supported on the tops of the balun support arms. The oscillator arms are connected to the grounding metal layer. The short circuit plate is connected with the microstrip balun. Differentially doubly-feed is performed on the radiator so that the current distribution on the surface of the oscillator arms tends to be consistent. A directional diagram has good convergence, and high isolation, a high cross-polarization ratio and good impedance bandwidth are obtained. In addition, each pair of differential feed line terminal is subjected to short circuit and two polarized differential feed lines are subjected to crossed short circuit so that two polarization has a high degree of similarity.

Present invention relates to a ultrathin dual polarization microstrip antenna. It contains radiating element, metal base plate and a pair of power feed parts, wherein two power feed parts fixed on metal base plate, each power feed part including power feed piece and connected impedance inverter circuit, said radiating element supported above two power feed parts, said radiating element having at least two V-groove, each V-groove axial symmetry distributed along radiating element center point, each V-groove angular point nearing to radiating element center point. Said V-groove prolongs current path, reducing resonant frequency, and shortening aerial size, and V-groove having restrictive effect to radiating element surface current to make most of flow along area between adjacent two V-grooves, thereby rising cross polarization ratio.

The embodiment of the invention discloses a dual-polarization array antenna unit. The dual-polarization array antenna unit comprises a plurality of radiation units, a first polarization feed network and a second polarization feed network, wherein the first polarization feed network and the second polarization feed network are correspondingly connected with the radiation units respectively. A plurality of feed ports, connected the radiation units, of the first polarization feed network are first feed ports and a plurality of feed ports, connected with the radiation units, of the second polarization feed network are second feed ports, wherein the adjacent first feed ports are connected in a constant-amplitude same-phase feed mode and the adjacent second feed ports are connected in a constant-amplitude reverse-phase feed mode. The embodiment of the invention further discloses a low-profile high-isolation MIMO antenna composed of the dual-polarization array antenna unit. The dual-polarization array antenna unit and the low-profile high-isolation MIMO antenna have the advantages that the overall peripheral size can be effectively reduced, the manufacturing technology is simple and cross polarization and isolation can be effectively improved.

The invention discloses a broadband base station antenna which comprises a metal reflecting plate with flanged sides, and a plurality of arrays arranged on the reflecting plate, wherein a square structure is formed by enclosing of the plurality of arrays, and the arrays and the square metal reflecting plate have the same center; the arrays on two opposite sides of the square structure all are connected in parallel through a coaxial feeder, and the arrays on one pair of sides are polarized at +45 degrees and the arrays on the other pair of sides are polarized at -45 degrees; each array comprises two same array arms, two baluns matched with the two array arms, a resonator, an inverted U-shaped feeding sheet and a base; and each array arm comprises three arm sections, so that the miniaturization of the sizes of the oscillators is achieved. A novel resonant mode can be introduced by loading the resonator near the oscillator arms, great increase of the bandwidth can be achieved by properly controlling the resonant mode within a working frequency range and all low-frequency ranges of 698MHz-960MHz of mobile communication can be covered. Meanwhile, the broadband base station antenna also has the characteristics of high gain, high isolation, a high cross-polarization ratio and a stable radiation pattern.

The invention discloses a wide-beam and high-gain antenna, comprising a cross oscillator pair arranged on a reflector and formed by a plurality of arrays, wherein the cross oscillator pair comprises pendulous wideband oscillators printed on two dielectric substrates respectively; the two pendulous wideband oscillators are cross, two arms of the oscillator are symmetric inverse L-shaped sheets with each including a vertical section and a horizontal extended section at the top of the vertical section, and the tail end of the horizontal extended section is a downward bent section; a parasitic unit is arranged on the upper side of the oscillator arm, a microstrip line is arranged on the other side of each of the two dielectric substrates, and the reflector is used for dual-polarized feed. The parasitic units are arranged on the upper side of the oscillator arms, thus realizing wide beams and good matching of single PCB (Printed Circuit Board) cross oscillators; and the wide-beam wideband PCB cross oscillator arrays obtain the characteristics of dual polarization, horizontal wide beams and high-gain radiation. The method is simple to implement, low in cost and suitable for batch production, and is applicable and effective for design and improvement of conventional wideband and high-gain oscillator antennas.

The invention discloses a low-profile high-gain fractal miniature base station antenna. The antenna is characterized by comprising an antenna housing, a reflecting plate combination body, a substrate, a metal separator plate array, a medium substrate with an antenna oscillator printed thereon, and a feed coaxial feed line connected with the antenna oscillator. The antenna oscillator comprises four sheet type units which are laterally and vertically symmetrical. Two units of the four sheet type units along each diagonal line form a pair of dipoles. The four sheet type units form crossed dipoles. A Minkowski fractal loop is formed by making secondary iteration I2 square Von Koch fractal curves connected in a head-to-tail way and changed into a planar sheet through filling. A pair of lug type bodies with the diagonal line as the symmetric axis is formed on the right upper corner or the left upper corner of the fractal loop. The lug type bodies are further combined with the fractal loops to form the four sheet type units. The antenna provided in the invention achieves a low profile, makes the back lobe obviously suppressed and further makes the front-to-rear ratio and the cross polarization ratio obviously improved through a proper design of the fractal miniature base station antenna structure. High gain and high efficiency which cannot be achieved through a common crossed dipole are further achieved.

The present invention provides a low-profile double-frequency ultra-wideband antenna, which comprises at least one double-frequency ultra-wideband vibrator unit. The double-frequency ultra-wideband vibrator unit comprises a pair of ultra-wideband vibrators printed on a dielectric substrate and arranged in an orthogonal manner. The two arms of each ultra-wideband vibrator are of a fat-block shape, and the two arms of each ultra-wideband vibrator are provided with arc grooves at the ends along the edges at two sides. The end of each ultra-wideband vibrator is loaded with a section of arc branch knot along the outer edges of the vibrator arms. The centrally intersecting part is provided with a feeding point connected coaxial cable or a balancing device. According to the invention, through the adoption of a thick highly-dielectric-constant dielectric substrate and the use of the manner of opening grooves on the vibrator surface and the loading of open circuit branch knot at the end, it is possible to provide for a micro base station of mobile communications a low-profile double-frequency ultra-wideband antenna featuring a low profile, a small size, the realization of MIMO, high separation and a high gain. The method is also innovative in idea, clear in principle, suitable for use and easy for implementation. With a low cost, the antenna can be produced in batches, and it can best replace a traditional Small Cell antenna. In addition, for the design and improvement in a traditional wideband intersecting vibrator antenna, the invention can also apply effectively.

The invention discloses a high-selectivity and low-profile microstrip dual-polarization filtering antenna and mainly solves the problems of relatively poor high selectivity and relatively low cross polarization ratio in a zero-degree direction of a traditional filtering antenna. The high-selectivity and low-profile microstrip dual-polarization filtering antenna comprises a low-layer feeding network structure (1), an intermediate-layer main body structure (2), an upper-layer coupling radiation structure (3) and an antenna cover (4) from bottom to top, the intermediate-layer main body structure(2) comprises an intermediate-layer floor (21) and a cross coupling slot radiation structure (26), a group of slots are etched in the intermediate-layer floor (21), are same in shape, are centricallysymmetric to an antenna center and are used for achieving high cross polarization ratio of the antenna in an axial direction. The group of cross coupling slots perpendicular to each other are etched on the cross coupling slot radiation structure (26), and four rectangular grooves perpendicular to the cross coupling slots are etched and are used for achieving wideband external inhibition of the antenna. By the high-selectivity and low-profile microstrip dual-polarization filtering antenna, the cross polarization ratio in the zero-degree direction is improved, the filtering effect of the antennais improved, and the high-selectivity and low-profile microstrip dual-polarization filtering antenna can be used for wireless communication.

The invention discloses a broadband low-profile 4X4 array dual-polarization directional antenna which comprises an antenna body, the antenna body comprises a reflecting plate, a high-frequency dielectric substrate, a circular cushion column, a radiation unit, a nut, a coaxial cable and a radio frequency connector, and the high-frequency dielectric substrate is installed in the middle over the reflecting plate. A plurality of groups of circular cushion columns are uniformly mounted at the joint of the high-frequency dielectric substrate and the reflecting plate; a plurality of groups of radiation units are uniformly arranged on the circular cushion columns; studs are inserted in the connecting positions of the radiation units and the circular cushion columns in a penetrating mode; nuts arefixed on the studs in a threaded manner and are in contact with the radiation units; The central current zero point of the radiation unit is in short circuit with the reflecting plate, and the surfaceof the radiation unit is symmetrically provided with a first window and a second window. According to the invention, the antenna radiation unit is optimally designed, and a circular or square radiation patch different from the traditional radiation patch is adopted, so that the antenna has the advantages of wide frequency band, high isolation, high cross polarization ratio and low profile.

The invention discloses a radiation unit which comprises a balun and a radiator which is fed and supported by the balun. The radiator comprises two half-wave vibrators which are orthogonally arranged. Each half-wave vibrator comprises two vibrator arms. Each vibrator arm is provided with a main pierced hole which is arranged on the symmetric axis of the vibrator arm. The size of the main pierced holes respectively belonging to the vibrator arms of different half-wave vibrators is different. Furthermore, the invention discloses a dual-polarized antenna which comprises at least one antenna reflecting plate and multiple radiation units which are arranged on the antenna reflecting plate. The aforementioned radiation unit is adopted. The dual-polarized antenna and the radiation unit thereof are high in cross polarization ratio and high in degree of isolation and gain and have great radiation characteristic.

The invention discloses a low-profile high-gain fractal small-scale base station antenna, which is characterized in that it includes a radome, a reflector assembly, a substrate substrate, a metal partition array, a dielectric substrate printed with an antenna vibrator, and an antenna vibrator. The feeding coaxial feeder; the antenna vibrator includes four sheet-shaped units that are symmetrical about left and right, up and down, two units on each opposite corner of the four-sheet units form a pair of dipoles, and the four sheet-shaped units form a cross oscillator; Iterative I2 square von Koch fractal curves are connected head to tail to construct a Minkowski fractal ring, and then filled as a plane piece, and a pair of diagonals are constructed at the upper right corner or upper left corner of the fractal ring with the diagonal as the axis of symmetry Ears, formed by merging them with fractal rings. Through the reasonable design of the antenna structure of the fractal small base station, the present invention realizes significant suppression of low profile back lobe, significant improvement of front-to-back ratio and cross polarization ratio; realizes high gain and high efficiency that cannot be achieved by a pair of conventional cross oscillators.

The invention discloses a dual-polarization antenna, and belongs to the antenna manufacturing technical field, aiming at solving the problem of large antenna design size and narrow antenna bandwidth in a wide frequency band. The technical scheme comprises the following points: a first antenna board, the first antenna board includes: a first dielectric board; a first feeder board; a first antenna panel; and a first mounting joint; and a second antenna board, the second antenna board includes: a second dielectric board; a second feeder board; a second antenna panel; and a second mounting joint;the first antenna board is provided with a first slot adjacent to one end of the first mounting joint, the first antenna board a second slot is formed in an end of the second antenna board away from the second mounting joint, and the first antenna board and the second antenna board are connected to the second slot by the first slot. the purpose of increasing bandwidth and reducing antenna size canbe achieved.

A differential feed dual-polarized oscillator assembly comprises a radiator and a pair of balun support arms orthogonally connected to the radiator in a differential double-feed way. The radiator comprises two pairs of oscillator arms orthogonal to each other at 45 degrees and two orthogonal center of the two pairs of oscillator arms is provided with a cross-shaped short circuit plate. The front of each balun support arm is provided with a mirror-symmetrical microstrip balun along the center. The mirror symmetrical microstrip balun forms a group of differential double-feed lines. The back surface of each balun support arm is provided with a mirror-symmetrical grounding metal layer along the center. The oscillator arms and the short circuit plate are supported on the tops of the balun support arms. The oscillator arms are connected to the grounding metal layer. The short circuit plate is connected with the microstrip balun. Differentially doubly-feed is performed on the radiator so that the current distribution on the surface of the oscillator arms tends to be consistent. A directional diagram has good convergence, and high isolation, a high cross-polarization ratio and good impedance bandwidth are obtained. In addition, each pair of differential feed line terminal is subjected to short circuit and two polarized differential feed lines are subjected to crossed short circuit so that two polarization has a high degree of similarity.

The invention provides a multi-frequency ultra-wideband oscillator and an antenna. The multi-frequency ultra-wideband oscillator comprises a low-frequency oscillator, a reflecting plate, a first high-frequency oscillator and two coupling feed sheets. The low-frequency oscillator comprises a plurality of radiation arms, a plurality of support arms and a base, the tops of the support arms are connected with the radiation arms, and the bottoms of the support arms are connected with the base. The radiation arms, the support arms and the base form a mounting cavity together. Each radiation arm is provided with vertically downward bending parts on the two sides respectively. The reflecting plate is fixed on the base. The first high-frequency oscillator is nested in the mounting cavity of the low-frequency oscillator, and the first high-frequency oscillator is fixed on the reflecting plate. The two coupling feed sheets are orthogonally connected and are arranged between the reflecting plate and the base. Therefore, the multi-frequency ultra-wideband oscillator provided by the invention has the effects of high front-to-back ratio, high cross polarization ratio, high isolation and ultra-wideband in the radiation direction.

The invention discloses a patch antenna with a high cross polarization ratio and a communication base station. The patch antenna comprises a substrate, a metal reflecting surface, a main radiating surface and a parasitic radiating surface, wherein the main radiating surface is arranged on the upper surface of the substrate, and is provided with a main radiating sheet and a feed port, a convex structure is arranged at one end of the main radiating surface, the convex structure is an inverted T shape, the convex direction of the convex structure is the direction of the feed port and is parallel to the feed port, the two sides of the convex structure are connected with the feed port, the metal reflecting surface is positioned on the lower surface of the substrate and is integrally formed through a laser etching or selective electroplating technology, the parasitic radiating surface comprises a parasitic radiation sheet arranged right above the main radiation sheet in parallel, and the parasitic radiation sheet is fixed on the substrate through a support column. By adopting the structure, the convex structure is arranged on the main radiation sheet to improve the polarization purity of the main radiating surface, so that the cross polarization ratio of the patch antenna is further improved; and the structure adopts two-point feed, so that the patch antenna is simple in wiring.

The invention provides a dual-polarized vibrator unit, an antenna and a multi-frequency antenna array. The dual-polarized vibrator unit includes a radiator and a balun support portion for feeding of the radiator. The radiator includes a dielectric substrate, two pairs of dipole antenna arms being disposed on an upper surface of the dielectric substrate and in orthogonal arrangement of plus or minus 45 degrees, and at least one coupling metal strap disposed on a lower surface of the dielectric substrate. Current induction is generated between the dipole antenna arms and the coupling metal strap so that a current path is formed on the coupling metal strap. The vibrator unit and the antenna thereof in the invention can achieve the ultra-broadband, high gain, high efficiency, high cross polarization ratio and high front-ratio, high isolation, low profile and low coupling and is simple and beautiful in structure, easy in engineering realization and suitable for mass production, the production cost is reduced, and the electrical performance index meets the base station antenna industry standard.

Present invention relates to a ultrathin dual polarization microstrip antenna. It contains radiating element, metal base plate and a pair of power feed parts, wherein two power feed parts fixed on metal base plate, each power feed part including power feed piece and connected impedance inverter circuit, said radiating element supported above two power feed parts, said radiating element having at least two V-groove, each V-groove axial symmetry distributed along radiating element center point, each V-groove angular point nearing to radiating element center point. Said V-groove prolongs current path, reducing resonant frequency, and shortening aerial size, and V-groove having restrictive effect to radiating element surface current to make most of flow along area between adjacent two V-grooves, thereby rising cross polarization ratio.

The invention provides a Massive MIMO array antenna and a base station, the Massive MIMO array antenna comprises a plurality of oscillators, a plurality of feed sheets, a plurality of feed lines and a second substrate, each feed sheet comprises a first quadrant region, a second quadrant region, a third quadrant region and a fourth quadrant region, the first quadrant region and the second quadrant region are in the same phase, the third quadrant area and the fourth quadrant area are in the same phase, the first quadrant area is at least provided with a first feeding point and a second feeding point, the second quadrant area is at least provided with a third feeding point and a fourth feeding point, and the plurality of feed lines at least comprise a first branch and a second branch. The first branch is electrically connected with the first feeding point and the second feeding point, and the second branch is electrically connected with the third feeding point and the fourth feeding point. According to the Massive MIMO array antenna and the base station provided by the invention, the mutual coupling between adjacent arrays can be obviously reduced.

The invention provides a plastic oscillator unit and an antenna. The invention relates to the technical field of antenna parts, the invention aims to solve the problem in the prior art, the oscillatoris high in cost, is not convenient to install, and cannot meet the requirements of a 5G frequency band. The technical scheme of the invention is as follows: the antenna comprises a plastic substrateand plastic oscillators, the plastic substrate and the plastic oscillators are integrally formed through a plastic processing mode, the plurality of plastic oscillators are uniformly distributed on the plastic substrate in an array shape, the upper surface of each plastic oscillator is provided with a first copper microstrip circuit, and the first copper microstrip circuit forms a first rectangular window with four continuous sides; the lower surface of each plastic oscillator is provided with a second copper microstrip circuit, and the second copper microstrip circuit forms a second rectangular window whose four sides are segmented. The plastic oscillator unit has the effects of the high front-to-back ratio, the high cross polarization ratio, the high isolation and ultra wide band in theradiation direction, and can meet the performance requirements of the 5G communication technology.

The invention provides a high-frequency radiation unit which comprises a radiator and a feed panel, the radiator is of a symmetrical structure and comprises two pairs of radiation unit arms and four baluns, the four radiation unit arms and the four baluns are connected in a one-to-one correspondence mode, the two pairs of radiation unit arms are arranged in a polarization orthogonality mode of + / -45 degrees, each pair of radiation unit arms are arranged diagonally, and the feed panel is arranged between the two pairs of radiation unit arms. The four baluns are all connected with the feed panel, each of the four baluns comprises a plurality of sections of impedance conversion branches, the impedances of the plurality of sections of impedance conversion branches are different, the design mode of the high-frequency radiation unit provided by the invention reduces loss, weakens current imbalance caused by feed, improves the cross polarization ratio, further widens the bandwidth, and improves the bandwidth. Therefore, the low-frequency and high-frequency coupling performance of the antenna is improved, and the high-frequency radiation efficiency is improved.

The invention discloses a differential broadband dual-polarization base station antenna for improving a cross polarization ratio. The antenna comprises a reflecting plate, a cross feed structure, four radiation units and four coaxial lines, wherein after the upper ends of the four coaxial lines penetrate through the reflecting plate, outer conductors at the upper ends of the four coaxial lines are connected with the four radiation units in a one-to-one correspondence mode, and an inner conductor at the upper end of each coaxial line penetrates through the corresponding radiation unit and then is connected with the cross feed structure; the lower ends of the four coaxial lines are connected with SMA (Styrene Maleic Anhydride) heads; the four coaxial lines form two pairs of differential feed ports, the four radiation units form two pairs of dipoles, and the two pairs of differential feed ports feed the two pairs of dipoles. The antenna has the characteristics of broad band, high cross polarization ratio and high isolation, realizes stable radiation patterns, stable half-power beam width and stable gains, and has simple structure and good performance; and the service life of the antenna can be prolonged by adopting a cast structure.

The invention provides a radiation unit and a base station antenna. The radiation unit comprises a substrate and a microstrip line. Wherein the substrate comprises a main board body, a plurality of bending units and a plurality of feed sheets; the main board body is located in the center area of the substrate; the plurality of bending units are located at the edge part of the substrate and are distributed in a polarized orthogonal manner; the bending units are connected with the edge of the main board body, and the included angles between the bending units and the main board body are a first preset included angle; a through hole is formed in the main board body; the feed sheets are connected with a connecting part between the through hole and the main board body, and included angles between the feed sheets and the main board body are a second preset included angle; and the plurality of feed sheets are connected through the microstrip line and are used for feeding the radiation unit. According to the invention, the structure of the substrate is simply optimized, the cross polarization ratio of the radiation unit can be effectively improved, additional materials and additional occupation of space resources of the antenna are avoided, and the radiation unit is simple to operate, low in cost and simple in structure.

The invention relates to an ultra-wide-band dual-polarization base station antenna for 2G / 3G / 4G mobile communication, and belongs to base station antennas for communication. The antenna comprises a reflecting plate, radiation units and n-shaped bending units; the cross section of the reflecting plate is U-shaped, the bottom of the reflecting plate includes a plane, and the two sides includes sidesurfaces. The side surfaces at the two sides of the reflecting plate are vertical to the bottom, and are the same in height. The three n-shaped bending units in parallel and at equal interval are arranged in the inner side of the reflecting plate, one of the n-shaped bending unit is positioned in the center line of the reflecting plate, and the n-shaped bending unit is not higher than the side surface of the reflecting plate. And the radiation units at equal interval are arranged in each gap between the n-shaped bending units.

The invention discloses an antenna unit with a high cross polarization ratio, an antenna and a communication base station. The antenna unit with the high cross polarization ratio comprises an upper radiation sheet, a lower radiation sheet and a feed network; the upper radiation sheet is arranged right above the upper radiation sheet in parallel; the output end of the feed network is connected with the lower radiation sheet; the lower radiation sheet is coupled with the upper radiation sheet through air; the upper radiation sheet and the lower radiation sheet are rectangular, circular and polygonal; the sizes of the upper radiation sheet and the lower radiation sheet are set according to the size of the antenna; extending patches are symmetrically arranged at the two ends of the upper radiation sheet, the shapes of the extending patches are set according to the application scene of the antenna, the sizes of the extending patches are set according to the frequency band of the antenna, and the extending patches are used for improving the cross polarization ratio in the axial direction. By adopting the scheme, the cross polarization ratio of the antenna is effectively improved by improving the current distribution, the structure is simple, and the cost is lower.

The invention discloses a radiation unit which comprises a balun and a radiator which is fed and supported by the balun. The radiator comprises two half-wave vibrators which are orthogonally arranged. Each half-wave vibrator comprises two vibrator arms. Each vibrator arm is provided with a main pierced hole which is arranged on the symmetric axis of the vibrator arm. The size of the main pierced holes respectively belonging to the vibrator arms of different half-wave vibrators is different. Furthermore, the invention discloses a dual-polarized antenna which comprises at least one antenna reflecting plate and multiple radiation units which are arranged on the antenna reflecting plate. The aforementioned radiation unit is adopted. The dual-polarized antenna and the radiation unit thereof are high in cross polarization ratio and high in degree of isolation and gain and have great radiation characteristic.

The invention provides a patch radiation unit and an array antenna. The patch radiation unit comprises a radiation element, a feed element and a microstrip bonding pad. The feed element and the radiation element are connected in an inserting manner and are welded and fixed through respective bonding pads; and the feed element is arranged right below the radiation element and is mounted on the microstrip bonding pad. According to the patch radiation unit provided by the invention, the characteristics of low profile, enough wide bandwidth and high cross polarization ratio are realized, resonance is formed by adding inductive and capacitive structures to improve the working bandwidth of the radiation unit, the working bandwidth of the radiation unit is expanded to 3300-3800MHz, and the cross polarization ratio is improved by using four-side chamfers.

The invention discloses a high-selectivity and low-profile microstrip dual-polarization filtering antenna and mainly solves the problems of relatively poor high selectivity and relatively low cross polarization ratio in a zero-degree direction of a traditional filtering antenna. The high-selectivity and low-profile microstrip dual-polarization filtering antenna comprises a low-layer feeding network structure (1), an intermediate-layer main body structure (2), an upper-layer coupling radiation structure (3) and an antenna cover (4) from bottom to top, the intermediate-layer main body structure(2) comprises an intermediate-layer floor (21) and a cross coupling slot radiation structure (26), a group of slots are etched in the intermediate-layer floor (21), are same in shape, are centricallysymmetric to an antenna center and are used for achieving high cross polarization ratio of the antenna in an axial direction. The group of cross coupling slots perpendicular to each other are etched on the cross coupling slot radiation structure (26), and four rectangular grooves perpendicular to the cross coupling slots are etched and are used for achieving wideband external inhibition of the antenna. By the high-selectivity and low-profile microstrip dual-polarization filtering antenna, the cross polarization ratio in the zero-degree direction is improved, the filtering effect of the antennais improved, and the high-selectivity and low-profile microstrip dual-polarization filtering antenna can be used for wireless communication.