65results about How to "High port isolation" patented technology

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 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 discloses a differential dual-band dual-polarized filtering antenna applied to a 5G Sub 6GHz base station system. The antenna comprises upper-layer and lower-layer dielectric substratesand four metal columns connecting the upper-layer and lower-layer dielectric substrates; the upper-layer dielectric substrate 1 is provided with a metal radiation patch, and a metal floor 2 is arranged on the upper surface of the lower-layer dielectric substrate and a metal feeder is printed on the lower surface of the same; the dual-band filtering property of the gain is acquired through slottingthe metal radiation patch and introducing a stepped impedance type open circuit branch knot into the metal feeder. The differential dual-band dual-polarized filtering antenna has the advantages of being simple in structure, easy to machine, relatively wide in resonant bandwidth within radiation band, relatively good in dual-band filter response, stable in gain and directional diagram, relativelylow in cross polarization, relatively high in port isolation, and easy to be integrated with the differential circuit. The differential dual-band dual-polarized filtering antenna can be applied to the5G Sub 6GHz base station communication system, and is particularly suitable for + / -45 degree dual-polarized base station antenna system of two bands: 3.3GHz-3.6GHz and 4.8GHz-5.0GHz.

The invention discloses a millimeter-wave even harmonic mixer structure. The millimeter-wave even harmonic mixer structure comprises a frequency-mixing microstrip chip, an antiparallel diode pair, a local-oscillator low-pass filter and an intermediate-frequency low-pass filter, wherein the frequency-mixing microstrip chip is disposed in a radio-frequency waveguide in a direction identical with the waveguide and is disposed in the center of a broadside of the radio-frequency waveguide, the antiparallel diode pair is disposed at the tail end of the frequency-mixing microstrip chip, and the local-oscillator low-pass filter and the intermediate-frequency low-pass filter are arranged on the end face of the tail end of the radio-frequency waveguide, determine the length of the frequency-mixing microstrip chip disposed in the radio-frequency waveguide according to local oscillator signals and determine the width of a grounding end of the frequency-mixing microstrip chip according to the size of the antiparallel diode pair. The millimeter-wave even harmonic mixer structure has the advantages that radio-frequency signals can be well coupled to diodes, and when radio-frequency signals and the local oscillator signals are subjected to frequency mixing, the millimeter-wave even harmonic mixer structure is excellent in frequency conversion performance, high in consistency and broader in operation bandwidth.

The invention provides a mini enhanced dual-polarization omnidirectional ceiling antenna. The antenna comprises a single cone, a horizontal polarization unit and a step-shaped floor which are arranged in a vertically coaxial and centrally overlapped manner from top to bottom successively, the single cone comprises a first single cone radiator and a second single cone radiator which are arranged in a crossing manner, the bottom of the single cone is provided with a feed point, and a coaxial feed cable is connected to the feed point in the bottom of the single cone by penetrating the step-shaped floor and the horizontal polarization unit from bottom to top successively. Within the frequency range from 0.8GHz to 2.70GHz, the single-cone ceiling antenna realizes effective impedance match, an ideal omnidirectional radiation performance, a substantial edge coverage enhanced effect, a consistent in-band coverage range, higher efficiency, higher port isolation degree (better than -24dB), small size and low profile and is suitable for indoor coverage. The antenna is also characterized by being novel in ideas, clear in principles, universal in methods, easy to realize, low in cost and suitable for batch production, the antenna can be used to replace a routine dual-polarization omnidirectional ceiling antenna, and can be used for design and improvement of a vertical-polarization enhanced omnidirectional ceiling antenna and a planar Alford loop antenna.

The invention discloses a novel dual-port feed four-frequency-band filtering duplex antenna. The antenna comprises: a radiation layer which is a metal patch provided with a U-shaped groove; a first dielectric substrate, wherein the upper surface of the first dielectric substrate is a radiation layer; a metal floor, wherein a gap is formed in the metal floor; and a second dielectric substrate, wherein the metal floor is arranged on the upper surface of the second dielectric substrate, a filtering feed network is arranged on the lower surface of the second dielectric substrate, and an air gap isarranged between the first dielectric substrate and the second dielectric substrate. According to the technical scheme provided by the invention, matching circuits among three elements in the traditional design are effectively reduced; the complexity of the antenna system is reduced, so that the size of the antenna system can be further reduced, and the structure becomes more compact; and meanwhile, the transmission loss among the filter, the duplexer and the antenna is greatly reduced.

The invention discloses a differential dual polarization patch antenna based on a split-ring resonator. The antenna comprises a bottom layer antenna reflection plate, wherein two split-ring resonatorsare arranged on the antenna reflection plate; the centers of the two split-ring resonators are connected and the two split-ring resonators are crossed; inner cores of four coaxial cables are respectively welded to the two ends of the two split-ring resonators; the four welding points are in a center symmetrical distribution state; a microband patch is formed on the top of the split-ring resonators. The differential dual polarization patch antenna based on the split-ring resonator disclosed by the invention has the advantages that the whole antenna is of a center symmetrical structure; the differential feed symmetrical resonance ring stimulation patch is used; the advantages of small dimension, compact structure, wide frequency band, high port isolation degree, high directivity diagram polarization isolation degree and the like are realized; the differential dual polarization patch antenna can be widely applied to the wireless communication fields of radar and base station communication, satellite communication, wireless local area networks and the like; the upper layer microband patch is a square patch, so that the mutual orthogonal intersection radiation mode is stimulated.

The invention provides a tri-polarized vehicle-mounted antenna applied to a 5G-V2X Internet of Vehicles communication system. The tri-polarized vehicle-mounted antenna comprises a circular dielectricplate, a square dielectric plate, a feed structure and eight groups of inverted L-shaped units, the circular dielectric plate is arranged below the square dielectric plate, and an omnidirectional radiation unit is arranged in the middle of the circular dielectric plate and is responsible for 5.85-5.925 GHz direct connection communication frequency bands; the square dielectric plate is located above the omnidirectional radiation unit of the circular dielectric plate. The center of the square dielectric plate and the center of the circular dielectric plate are located on the same vertical centerline, the area of the square dielectric plate is smaller than that of the circular dielectric plate, and a directional radiation unit is arranged on the square dielectric plate and is responsible fordirectional radiation of a wide coverage surface in 3.30-3.60 GHz and 4.80-5.00 GHz frequency bands. The antenna has the characteristics of triple polarization, low cross polarization, high port isolation, directional radiation mode wide beam and omnidirectional radiation mode low out-of-roundness, realizes relatively high gain on an azimuth angle plane, and meets 5G-V2X requirements.

The invention provides a double-frequency high-gain dielectric resonance array antenna. The antenna comprises a substrate, two microstrip feed networks and a dielectric resonant unit array composed of N dielectric resonant units, N >=1, the microstrip feed networks are arranged on the substrate, the N dielectric resonant units are arranged on the substrate in a coaxial or collinear arrangement manner, feed points of the dielectric resonant units are coupled to the output ends of the two microstrip feed networks, first feed slots are arranged in two side surfaces of each dielectric resonant unit, and a second feed slot is arranged in the bottom surface of each dielectric resonant unit. One microstrip feed network is provided with a group of coupling apertures close to the output end of a dielectric cube, the other microstrip feed network is provided with a group of coupling probes close to the output end of a dielectric cube, the coupling probes and the first feed slots form a coupling power, the coupling apertures are formed in the substrate and coupled with the second feed slots. The high-gain dielectric resonance array antenna is compact in structure, low in weight, low in loss, high in efficiency, low in cost, easy to assemble and suitable for batch production and includes fewer welding points, and can be used to provide effective or beneficial references for design and improvement of other broadband, multi-frequency, low-gain dielectric resonant units or array antennas.

The invention discloses a dual-polarized ultra-wideband base station antenna radiation unit comprising an unbalanced-balanced feed connecting seat, a radiator, and a feed conductor. The radiator is formed by two pairs of orthogonal oscillator arms. The oscillator arms are arranged in the same plane and are installed on one end of the unbalanced-balanced feed connecting seat. The feed conductor is equipped with a dielectric clamp, is installed inside the unbalanced-balanced feed connecting seat through the dielectric clamp, and is separated from the unbalanced-balanced feed connecting seat. The dual-polarized ultra-wideband base station antenna radiation unit has beneficial effects of high installation firmness, good batch production consistency, good cross polarization ratio, high port isolation, and a broadband characteristic between 1680 and 3000MHz, achieves a wider bandwidth while satisfying the requirement of a conventional broadband base station antenna, provides a condition for later expansion, and has wide application prospect.

The invention relates to a broadband two-unit microstrip MIMO antenna based on a multielement parasitic surface structure. The antenna comprises two dielectric substrates, namely a first dielectric substrate and a second dielectric substrate which are sequentially overlaid from top to bottom; the dielectric substrates are the same in size and are made from the same material, and a metal structureis formed on the surface of each dielectric substrate; metal parasitic units in different shapes are arranged on the upper surface of the first dielectric substrate, two excitation metal patches are arranged between the first dielectric substrate and the second dielectric substrate, and the two excitation metal patches are orthogonally arranged. The antenna provided by the invention realizes miniaturization of an antenna structure, the highest miniaturization ratio of a two-unit MIMO antenna can reach 25%, and the miniaturization ratio of a multi-unit MIMO antenna is higher; meanwhile, a unitmicrostrip antenna based on a multi-dielectric-substrate structure and a multi-parasitic-unit radiation structure is expanded in bandwidth while radiation gain is increased.

The invention discloses a miniature orthogonal broadband electric bridge. The miniature orthogonal broadband electric bridge comprises a two-sided copper-coated dielectric plate and two single-sided copper-coated dielectric plates, wherein microstrip circuits with same structure are respectively etched on a front surface and a back surface of the two-sided copper-coated dielectric plate, each microstrip circuit comprises two N-order Lambda-fourth impedance matching transmission lines which are symmetrically arranged, N is equal to 2, 3 until 10, ends of the two Lambda-fourth impedance matchingtransmission lines are connected via a 50-ohm impedance line, an open-circuit branch is arranged at a connection position of the Lambda-fourth impedance matching transmission lines, the two single-sided copper-coated dielectric plates are respectively laminated onto the front surface and the back surface of the two-sided copper-coated dielectric plated etched with the microstrip circuits to forma deviation strip line-structure directional coupler, four ports of the two microstrip circuits are respectively an input port, a direct-through port, a coupling port and an isolation port, the inputport and the direct-through port are arranged in the same microstrip circuit, the coupling port and the isolation port are arranged in the same microstrip circuit, and the direct-through port and thecoupling port are arranged at the same side.

The invention discloses a microwave and millimeter wave large-frequency-ratio common-caliber antenna with high isolation. The antenna comprises a 4*4 substrate integrated waveguide back cavity slot array C, a substrate integrated waveguide power dividing feed network N and a low-frequency filtering feed network L. According to the invention, a millimeter wave antenna array and a microwave antenna are integrally designed, millimeter wave and microwave signals are radiated by using the same radiation structure, the aperture utilization rate is high, and miniaturization of a common-aperture antenna is realized; the high-pass characteristic of the substrate integrated waveguide structure is fully utilized, the two microstrip filtering structures are introduced at the same time, the polarization directions of the two antennas are perpendicular to each other, and high port isolation is obtained in the microwave working frequency band and the millimeter wave working frequency band; and the design of the large-frequency-ratio common-caliber antenna is generally complex, and compared with a traditional structure, the topological structure of the microwave and millimeter wave large-frequency-ratio common-caliber antenna is simple, so that the processing cost is lower, and the microwave and millimeter wave large-frequency-ratio common-caliber antenna is easier to implement.

The invention provides a broadband high-power low-loss circular power allocation synthesizer which comprises a power allocation ring and at least one isolating ring, wherein the isolating ring is located on the outer portion of the power allocation ring. According to the technical scheme, the broadband high-power low-loss circular power allocation synthesizer is characterized in that low loss and broadband are achieved, and high amplitude and phase consistency exists between two branch circuits. The working principle of a micro-strip annular bridge is used, and therefore the problems of isolation resistance power capacity and insertion loss increase in a traditional Wilkinson power allocation synthesizer can be solved effectively.

The invention discloses a Wilkinson power divider based on a glass through hole technology. The Wilkinson power divider comprises a parallel plate condenser unit, a rewiring layer, three-dimensional solenoid inductor units and an isolating resistor; the power divider is composed of a reactance network consisting of lumped parameter elements, the three-dimensional solenoid inductor units and the parallel plate condenser unit which are compact in structure and low in loss are adopted, solenoid inductors passing through a glass substrate are taken as the lumped parameter elements of the power divider, the solenoid inductors take full advantage of the characteristics of glass through hole vertical arrangement and low electric loss, the power divider is small in area, large in inductance valueand low in loss, and the dimensions of the power divider are greatly decreased; the volume of the power divider is greatly reduced, and the performance of the power divider is guaranteed while the integration level of the circuit is improved. According to the power divider disclosed by the invention, input signal power can be halved into two output ports, the power divider has the advantages of low power loss, high port isolation, small phase difference, compact dimensions and the like, and the power divider is particularly applicable for micro three-dimensional heterogeneous integration packaging.

The invention discloses a tapered slot antenna with a cross structure with reflectors, which comprises two mutually perpendicular tapered slot antennas (1, 2), a reflector (3) and a plastic structure used for supporting and stabilizing the antenna; the tapered slot antenna Two dielectric plates are used for cladding. This stable method effectively solves the problem of easy deformation caused by the thin medium of the tapered slot antenna itself, so as to ensure the vertical accuracy of the two tapered slot antennas after they cross, so as to improve the two The isolation effect of the antenna. The antenna of the invention can realize impedance matching and stability of lobe width in a wide frequency range, provide ±45° polarization and high front-to-back ratio, and meet the requirements of mobile communication base station antennas.

The invention relates to a laminated differential broadband base station antenna, which comprises an antenna main body, a reflecting plate and a coaxial line, wherein the antenna main body is arrangedabove the reflecting plate through the coaxial line, the antenna main body comprises a radiation unit, a cross-shaped feed structure, a parasitic unit, a first dielectric substrate and a second dielectric substrate, the radiation unit and the cross-shaped feed structure are installed on the lower surface and the upper surface of the first dielectric substrate respectively, the parasitic unit is installed on the lower surface of the second dielectric substrate, the second dielectric substrate is placed above the first dielectric substrate, the radiation unit is composed of four linear radiation arms, and the tail end of each radiation arm of the radiation unit is loaded with an L-shaped branch knot. The structure provided by the invention meets the electrical performance of the antenna, and has excellent radiation performance; and compared with a traditional single-port antenna, the antenna of the invention has the advantages that the anti-interference capability of the antenna is improved by adopting dual-port feeding, and the antenna is made of a PCB and has the advantages of low cost, simplicity in processing and the like.

The invention relates to the technical field of microwave antennas, and discloses a multimode multifunctional communication and navigation common-caliber integrated antenna. The antenna comprises a discone body, a metal cavity, a first feed connector, a metal disc, a plurality of metal short-circuit columns, a second feed connector, a microstrip antenna and a connecting piece, the discone body serves as a communication antenna, and the microstrip antenna is a navigation antenna. the discone body is embedded in the metal cavity and is coaxial with a bottom plate of the metal cavity, the first feed connector penetrates through the center of the bottom plate of the metal cavity and is connected with the center of the lower end of the discone body, and the metal disc is arranged at the upper end of the discone body and is connected with the bottom plate of the metal cavity through a plurality of metal short-circuit columns. Any one of the plurality of metal short-circuit columns is provided with a through hole, the second feed connector is arranged on the bottom plate of the metal cavity and passes through the through hole to feed the microstrip antenna, and the microstrip antenna is arranged on the metal disc and is fixedly connected with the plurality of metal short-circuit columns through connecting pieces. Therefore, the common-caliber integrated design of the communication antenna and the navigation antenna can be realized.

The embodiment of the invention provides an antenna unit and electronic equipment, relates to the technical field of communication, and aims at solving the problem that the antenna performance of theelectronic equipment is poor due to the fact that the frequency band covered by a millimeter wave antenna of the existing electronic equipment is less. The antenna unit comprises a metal groove, M feed parts arranged at the bottom of the metal groove, and M radiation structures arranged in the metal groove, wherein each radiation structure in the M radiation structures comprises a first radiationbody, a second radiation body electrically connected with the first end of the first radiation body, and a third radiation body electrically connected with the second radiation body; the second end ofthe first radiator in each radiation structure is electrically connected with different feed parts in the M feed parts, the M radiation structures are arranged in the metal groove in a surrounding manner according to a first sequence, and M is an integer greater than 1. The antenna unit is applied to the electronic equipment.

The invention discloses a dual-frequency dual-circularly-polarized common-aperture antenna for satellite communication. The dual-frequency dual-circularly-polarized common-aperture antenna comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate which are sequentially stacked from bottom to top; the bottom surface of the first dielectric substrate is provided with a feed network structure, and the top surface is provided with a metal ground; a low-frequency radiation unit is arranged on the top surface of the second dielectric substrate; a high-frequency radiation unit is arranged on the top surface of the third dielectric substrate; the feed network structure comprises a low-frequency port feed network structure and a high-frequency port feed network structure, and band-pass filtering structures are arranged in the feed network structures respectively; and the high-frequency and low-frequency port feed network structures are connected with the high-frequency and low-frequency radiation units through the slot coupling structures respectively. According to the invention, the high port isolation is realized by introducing the band-pass filtering structure, the feed network structure is connected with the radiation unit through the slot coupling structure, and impedance and axial ratio bandwidth are improved by introducing the slot coupling structure; the high-frequency and low-frequency radiation units are designed in a layered manner, so that the overall size of the antenna is reduced; the overall design is simple and the weight is light.

The invention discloses a dual-polarized broadband base station antenna radiating unit. The unit includes an oscillator BALUN, four oscillator arms and two cables; the oscillator balun is of a symmetric and hollow structure, the oscillator arms and the oscillator balun are integrally formed, the four oscillator arms forming a radiating body are symmetrical by using the oscillator balun as the center and are orthogonally combined to form a plus or minus 45-degree polarized distribution, the four oscillator arms are located on the same plane, and the distance between the plane where the four oscillator arms are located and metal reflection plates is the one-fourth wave length; the oscillator arms are rectangular and are internally provided with hollow polygons, and a rectangular hollow gap is formed between every two adjacent oscillator arms. The dual-polarized broadband base station antenna radiating unit is high in installation stability, good in batch production consistency, good in cross polarization ratio and high in port isolation degree, has 698-960MHz broadband characteristics, meets the requirement of an existing broadband base station antenna, has higher bandwidth, provides conditions for future expansion, and has broad application prospects.

The invention discloses a highly-integrated dual-polarized base station array antenna suitable for 2 / 3 / 4 / 5G communication. The antenna is characterized by comprising a dielectric substrate; the frontsurface of the dielectric substrate is a reflecting surface; a low-frequency feed network and a high-frequency feed network are printed on the back surface of the dielectric substrate; n*n low-frequency array antenna units and N*N high-frequency array antenna units are arranged on the reflecting surface; and the low-frequency array antenna units and the high-frequency array antenna units are of up-down layered nested structures. The array antenna disclosed by the invention has the advantages of wide frequency band, double frequency bands and high integration; and the directional diagram, the gain and the lobe width of the array antenna are stable. Due to the fact that different array elements are designed in an up-down layered nesting mode, the structure of the array antenna is compact, and the size and profile of the array antenna are greatly reduced.

The invention discloses a vector synthesis base station antenna unit. A feeding structure is horizontally fixed above a reflection plate through support columns. The upper surface of the feeding structure is vertically equipped with a main radiator. The main radiator is a rectangular structure formed by four conductive plates, and the upper and lower ends of the rectangular structure are opened. Two adjacent conductive plates have a gap. The feeding structure comprises a dielectric plate. The upper surface of the dielectric plate and the lower opening of the main radiator are respectively provided a patch. The two diagonal lines of the patch are respectively provided with a seam. The lower surface of the dielectric plate is printed by a first feed line and a second feed line. The first feed line surrounds the seam of one diagonal line; and the second feed line surrounds the seam of the other diagonal line. The reflection plate is provided with a through hole for allowing radio frequency cables to pass. The inner cores of the two radio frequency cables are welded with the first feed line and the second feed line respectively; and the outer cores of the two radio frequency cables arewelded with the patches respectively. The vector synthesis base station antenna unit is small in size, wide in frequency band and stable in radiation property, and can meet market requirements.

A high-isolation symmetrical folding short-circuit dipole two-unit MIMO antenna comprises two symmetrically-arranged folding short-circuit dipole antenna units and a dumbbell-shaped grounding metal isolator, and the two folding short-circuit dipole antenna units are located at the two sides of the grounding metal isolator respectively, are symmetrical about the central connecting line of a vertical arm of the grounding metal isolator and share one rectangular dielectric substrate. The port isolation degree of the two folding short-circuit dipole antenna units is improved to 20 dB or above through the dumbbell-shaped grounding metal isolator, a planar dipole antenna serves as a basic antenna structure, the two arms of the dipole antenna are folded, and the two arms are short-circuited through the metallized through holes, so that the frequency band width of the antenna is expanded, an antenna far-field radiation pattern is improved, and the antenna far-field radiation efficiency is improved. According to the invention, the antenna complexity is reduced, the bandwidth is expanded, the energy radiation is uniform, and the radiation efficiency of the antenna is improved.

The invention discloses a signal synthesis device for a passive subarray antenna. The signal synthesis device comprises a substrate for fixing a circuit component; a combiner disposed on the substrate; a directional coupler disposed on the substrate; a high-pass filter disposed on the substrate; an input apparatus which is connected to the output end through the combiner, the directional coupler and the high-pass filter in turn, wherein the substrate is made of an F4B microwave material. The device provided by the invention employs the F4B microwave material for fixing the circuit component, employs a technical scheme that two signals inputted by two subarray antennas are synthesized through the combined, and outputs the signals after the signals sequentially pass through the directional coupler and the high-pass filter. A lumped parameter and a distribution parameter are combined for designing the circuit structure of the device, thereby effectively reducing the insertion loss, improving the isolation degree of a port and avoiding the distortion of the signals. Moreover, the device is small in overall size, is light in weight, is low in cost, and is high in reliability.

The invention discloses a microwave and millimeter wave large-frequency-ratio common-caliber antenna combined with an MIMO technology. On a microwave and millimeter wave large-frequency-ratio common-caliber antenna, four substrate integrated waveguide back cavity patch antennas and four electric dipoles of an electromagnetic dipole are shared through structural design, a 2 * 2 MIMO antenna array is formed to radiate millimeter wave signals, a dual-polarized electromagnetic dipole antenna is used in a microwave frequency band, the MIMO technology is combined in a millimeter wave frequency band, and the antenna has a wide application prospect. Finally, the large-frequency-ratio common-aperture antenna which has the characteristics of high integration level, high isolation and the like, is combined with the MIMO technology in a millimeter wave frequency band and can cover multiple frequency bands is realized.

The invention discloses a high-performance dual-polarized microstrip antenna for a fifth-generation communication system. The antenna comprises a main radiator, a secondary radiator, an upper dielectric plate, a lower dielectric plate and a metal ground plane. The upper dielectric plate is fixed right above the lower dielectric plate through support columns, the main radiator is printed on an upper surface of the lower dielectric plate, the secondary radiator is printed on a lower surface of the upper dielectric plate, and the metal ground plane is printed on a lower surface of the lower dielectric plate. The structure of the main radiator is symmetrical about the geometric center of the main radiator, the main radiator comprises a square patch and a first gradient microstrip line, a second gradient microstrip line, a third gradient microstrip line and a fourth gradient microstrip line, the first gradient microstrip line, the second gradient microstrip line, the third gradient microstrip line and the fourth gradient microstrip line are connected with four corners of the square patch in a one-to-one correspondence manner, included angles between the second gradient microstrip line,the third gradient microstrip line and the fourth gradient microstrip line and the first gradient microstrip line are 180 degrees, 90 degrees and -90 degrees respectively. The problem that an existingbase station antenna is difficult to meet the reliable application requirement of a 5G large-scale antenna array is solved.

The invention discloses a 5G mobile terminal MIMO (Multiple Input Multiple Output) antenna based on a chip integrated module unit, which is suitable for the field of mobile communication. The antenna comprises a dielectric substrate, a system metal floor and four integrated chip modules. The four integrated chip modules have the same physical size, are arranged at four corners of the system metal floor and are symmetrically distributed; each integrated chip module comprises two sub antenna units working at 3.5 GHz and two corresponding feed ports; and each sub-antenna unit is composed of a radiation slot and a feed microstrip line. In addition, a microstrip line branch structure is additionally arranged between the two sub-antenna units, and an additional anti-phase coupling path is introduced between the sub-antenna units, so that the aim of improving the isolation between the sub-antenna units is achieved. The 5G mobile terminal MIMO antenna uses the integrally designed chip integrated modules, is convenient to disassemble and exchange, and has the advantages of saving space and being low in cost, thereby having a good application prospect in 5G mobile phone terminals.