174 results about "Microstrip antenna array" patented technology

An antenna unit formed in the shape of a hollow box comprising (a) a substrate forming the front side of the antenna unit, (b) a first microstrip antenna array formed on the substrate, (c) a second microstrip antenna array formed on the substrate, (d) a ground plane forming the rear side of the antenna unit, and (e) a plurality of periodic filters formed on the ground plane. The periodic filters are formed by etching a series of circular patterns, or holes, through the ground plane. The periodic stop band filters provide for improved isolation between the microstrip antenna arrays, without the need for adding additional costly or space consuming components.

The invention provides a multi-layer electromagnetic band gap decoupling structure for a microstrip antenna array. The multi-layer electromagnetic band gap decoupling structure is used for reducing coupling between antenna array elements of the array by adding three four-layer electromagnetic band gap structures with completely identical structures between array elements of the antenna array. Therefore, coupling between antenna array elements can be reduced and the isolation of the antenna array can be improved. The antenna array includes a common ground plate arranged at the lower surface of a dielectric plate, a rectangular radiation paster arranged at the upper surface of the dielectric plate, two coaxial feed ports, four electromagnetic band gap structure units, and respective short-circuit probes. According to the designed multi-layer electromagnetic band gap decoupling structure, coupling between antenna array elements can be reduced effectively; the isolation of the antenna array can be improved; and the high-performance array antenna design can be realized.

High-directivity microstrip antennas comprising a driven patch and at least one parasitic element placed on the same plane, operate at a frequency larger than the fundamental mode of the driven patch in order to obtain a resonant frequency with a high-directivity broadside radiation pattern. The driven patch, the parasitic elements and the gaps between them may be shaped as multilevel and/or Space Filling geometries. The gap defined between the driven and parasitic patches according to the invention is used to control the resonant frequency where the high-directivity behaviour is obtained. The invention provides that with one single element is possible to obtain the same directivity than an array of microstrip antennas operating at the fundamental mode.

The present application relates to the field of antenna technologies, and discloses a shared-aperture antenna and a base station, to resolve a problem of sharing an aperture between antenna arrays working in different frequency bands. The shared-aperture antenna includes a dielectric substrate, a microstrip antenna array, and an electrically small antenna array, where the microstrip antenna array includes rows of microstrip patch antenna units uniformly distributed in arrays, and the microstrip patch antenna units fit a surface of the dielectric substrate; the electrically small antenna array includes electrically small antenna units that are parallel to each other; and the electrically small antenna units are inserted at intervals between the microstrip patch antenna units, and fit the surface of the dielectric substrate.

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

The invention discloses a missile-borne communication system active phased-array antenna, and aims to provide a phased-array antenna with high transmission code rate and efficient heat dissipation. According to the technical scheme, a microstrip antenna array and a tile-type T/R assembly are of a tile-type structure and are divided into a plurality of independent sub-array modules, and the sub-array modules are horizontally distributed in the upper portion of an antenna to form a transmitting array and a receiving array; a transmitting signal passes through a power distribution network, and enters the tile-type T assembly through a microstrip power divider; each multifunctional integrated chip divides an input radio frequency signal into a plurality of paths; the signals are respectively sent to a final-stage amplifier core, and then transmitted to the microstrip antenna array; received signals enter the tile-type R assembly through the microstrip antenna array, multiple paths of signals enter the multifunctional chip to be synthesized and are output to the power synthesis network through the microstrip power divider synthesis path, and one path of full-array-combination signals output through the radio frequency output interface and one path of sub-array-combination signals output through the radio frequency output interface are formed.

The invention discloses a dual-circular polarization microstrip antenna array which comprises a metal frame, a radiation microstrip board, metal columns, foam, a feeder microstrip board, a metal floor and connectors. Directional couplers, power dividers, radiation patches and isolation hole arrays are integrated by the feeder microstrip board, so that dual-circular polarization radiation functions can be realized. Impedance matching and bandwidth broadening functions can be realized by the radiation microstrip board and a foam board. The connectors are used as interfaces of the dual-circular polarization microstrip antenna array and feeder line systems. Grounding and protection effects can be realized by a frame which comprises the metal frame and the metal floor. Interlayer positioning, structure strengthening and resonant effect eliminating functions can be realized by the metal columns. The dual-circular polarization microstrip antenna array has the advantages that double-layer microstrip patch antennas, circular polarization power division feeder, positioning and supporting, resonance eliminating, mutual coupling isolation and environmental protection technologies are combined with one another, accordingly, merits of low profiles, costs and cross polarization of the traditional circular polarization microstrip patch antennas are inherited, and the dual-circular polarization microstrip antenna array is simple and firm in structure and convenient to process and can be used as a communication or radar dual-circular polarization phased-array antenna.

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

The invention relates to the field of waveguide-microstrip transition structure in passive devices, and discloses a waveguide-microstrip conversion and power divider which is based on a double-layer substrate and has a slot coupling structure. The waveguide-microstrip conversion and power divider comprises double-layer substrates (1, 2), a microstrip (3) positioned on the upper surface of the upper-layer substrate (1), a first grounding metal plate positioned between the upper-layer substrate (1) and the lower-layer substrate (2), and a waveguide end (7) connected with the lower surface of the lower-layer substrate (2) through a second grounding metal plate, the first grounding metal plate is provided with a slot, the lower surface of the lower-layer substrate (2) is provided with a window which has the same shape and size as those of a cavity in a waveguide tube, and a frequency adjustment unit (5) is arranged at the window. The waveguide-microstrip conversion and power divider is suitable to be used for the feeding of microstrip antenna arrays with waveguide feeding forms, and can be used as a waveguide-microstrip transformation signal distributor in a radio frequency circuit.

The invention discloses a high-gain low-sidelobe highly directive antenna based on an artificial medium structure, comprising a microstrip antenna array and a radome composed of a plurality of grooved cross metal strip artificial medium structures; the grooved cross metal strip structure is printed on a tellite and is used as the radome of the microstrip antenna array; the structure can be equivalent to a homogeneous medium with plasma frequency by rationally designing the cycle and size of the metal structure; the equivalent index of refraction of the frequency of the electromagnetic wave is similar to zero when the frequency is in a certain frequency band. The energy of the electromagnetic wave radiated by the microstrip antenna array is collected in the normal direction of the radome when the electromagnetic wave passes through the radome to achieve the effect of gathering energy, thus improving the overall directivity and gain of the antenna and reducing the sidelobe of the antenna. The antenna not only has the advantages of high gain, good directivity, low sidelobe and the like, but also has the characteristics of good mechanical performance, convenient fixed mounting, simple processing, low cost, small structure size and the like.

The invention discloses a three-frequency dual polarization cone conformal micro-strip antenna array. Three-frequency operation is achieved by vertically placing a single-frequency micro-strip antenna array and a dual-frequency micro-strip antenna array on the surface of a cone, and the antenna arrays evenly surround the surface of the cone to achieve omni-directional wave beam coverage. Each array is formed by connecting four micro-strip antenna units through micro-strip lines in a parallel feeding mode. Micro-strip antenna radial edges feed a single-frequency antenna unit, and micro-strip antenna non-radial edges feed a dual-frequency antenna unit. The size of patches is reduced by slotting the non-radial edges of the single-frequency antenna unit, and a patch unit works for linear polarization. Dual frequency is achieved by slotting the radial edges of the dual-frequency antenna unit, low frequency is circular polarization, and high frequency is linear polarization. Micro-strip media used for processing antennas are flexible special media. According to the three-frequency dual polarization cone conformal micro-strip antenna array, the three-frequency dual polarization work requirement can be achieved on the surfaces of limited carriers, and omni-directional coverage of wave beams can be achieved.

The invention relates to an array antenna which comprises a microstrip antenna array, a baffle board and a phase-shift feed network, wherein the microstrip antenna array is located on the front of the baffle board and the phase-shift feed network is located on the back of the baffle board. The array antenna provided by the invention has a compact structure, strong anti-jamming capability, favorable axial ratio bandwidth and low elevation gain.

The invention relates to a microstrip antenna array applied periodic spatial wave blocking and decoupling structure, which is used to reduce the coupling of array antennas and is realized through the loading of a periodic spatial wave blocking structure in the antenna array. The stereoscopic periodic spatial wave blocking structure is capable of reducing the coupling of the antenna array elements and increasing the separation of the antenna array. The structure comprises mainly a dielectric substrate 701, a commonly grounding plate 301, an antenna rectangular radiation patch 101 and an antenna rectangular radiation patch 102, a stereoscopic periodic spatial wave blocking structure 201, a patch 601, a grounding probe 501, and coaxially feed ports 401 and 402. The stereoscopic periodic spatial wave blocking structure designed by the invention cannot only effectively reduce the coupling in the antenna array, but also effectively increases the separation of the antenna array, and therefore, achieves the design of high-performance array antennas.

The related microstrip antenna with high gain and wide angle-field lobe comprises the microstrip metal paster (2) on polyhedral microstrip medium plate (1) included any angle with bottom for different requests, and the microstrip antenna unit (5) with grounding reflector (3) and feed line (4) to form further the polyhedral microstrip antenna array. With small size and cost, this portable product has wide application special the miniaturized satellite signal antenna.

The invention discloses a highly directional antenna utilizing a radome with the structure of ring-shaped metal pair units; the antenna comprises a microstrip antenna array, a feed source connected with the microstrip antenna array and the radome of sandwich type consisting of the structure of ring-shaped metal pair units. The structure of ring-shaped metal pair units manufactured on an FR4 printed circuit board is taken as the radome of the microstrip antenna array, the homotactic magnetic conductivity can be adjusted to be zero by changing the distance between the printed circuit boards, and the obtained corresponding effective index is zero. The energy of electromagnetic wave emitted by the microstrip antenna array can be concentrated along the normal direction of the radome when the electromagnetic wave passes through the radome, thus achieving the effect of accumulating energy and improving the directional property and the gain of the whole antenna. The highly directional antenna can be applied to various wireless transmissions, beam communications and interferential emission and receiving systems such as communication, radar, etc. Compared with the traditional antenna, the system structure of the antenna has the advantages of simple and small structure, convenient disassembly and assembly, low cost, good directional property, high gain, etc.

A planar microstrip antenna includes one or more aperture-fed circular patch radiating elements capacitively coupled to respective parasitic strip elements. The circular patches are symmetrically disposed above respective ground plane apertures, and the parasitic strip elements are annular sectors that are co-planar and concentric with the circular patches, and placed adjacent to the periphery of each circular patch. The disclosed geometry enhances the input impedance bandwidth, and significantly reduces off-boresight radiation variability to provide beam directivity that is more uniform over both frequency and direction.

The invention discloses a preparation method of a curved conformal microstrip antenna array surface and aims to provide a technological method of a microstrip antenna completely conformal to a metal structural part. According to the technical scheme, microstrip patches selected to serve as antenna conformal array units, and a curved antenna array surface is directly printed on the metal structuralpart; sand-blasting roughening processing is performed first, wherein a direct writing pen A is adopted to spread a polyimide precursor solution in a layered mode on a sand-blasting surface of a metal carrier according to the shape and size of a dielectric layer of the microstrip antenna array surface till the requirement of total thickness is met, and after surface drying, temperature is raisedthrough a heating substrate for dehydration, and a conformal dielectric layer of the microstrip antenna array surface is formed through aggregation on the surface of the metal carrier; pulse lasers are adopted to ablate bottom holes of vertical interconnected holes in the array units of the polyimide dielectric layer, the bottom holes are filled with conductive silver paste to serve as the vertical interconnected holes, and sintering is performed to solidify the conductive silver paste; and a conductive silver paste array unit pattern is spread on the conformal dielectric layer and is solidified onto the surface of the dielectric layer after surface drying, so that the curved conformal microstrip antenna array surface is formed.

The invention relates to a broadband circularly polarized microstrip antenna array with C waveband gap coupled feeding. The broadband circularly polarized microstrip antenna array comprises a first-layer dielectric plate 1, a second-layer dielectric plate 2 placed below the first-layer dielectric plate, a third-layer metal reflecting plate 3, and a supporting nylon column 4. A circular radiating unit 5 is arranged on the upper surface of the first-layer dielectric plate 1, a bow-tie-shaped coupling gap 6 is formed in the upper surface of the second-layer dielectric plate 2, and a feed network 8 and a phase shift network 10 are arranged on the lower surface of the second-layer dielectric plate 2. According to the broadband circularly polarized microstrip antenna array, the technology of the broadband phase shift feed network and the bow-tie-shaped coupling gap is adopted, and the broadband circularly polarized microstrip antenna array has broadband, circular polarization and other electrical performance, and meanwhile is low in weight, small in size, low in section and easy to manufacture.

Disclosed is a circularly polarized stacked microstrip antenna array with broad band, capacitance compensation, which is fed through a probe. A first medium substrate(2), a first support(4a), a second medium substrate(3), a second support(4b), a feed-in network(5), a feed-in cable(6) and a feed-in metal probe(33)are sequentially arranged inside an antenna shield. An parasitic appended patch(21) is arranged at the inner side of the first medium substrate; one side of the second medium substrate, which contacts with the first support(4a), is provided with a feed-in appended patch(31) and the other side is provided with a capacitance compensation metal appended patch(32); the output port of the feed-in network(5) is connected with the feed-in cable(6); the feed-in network(5) is welded with the feed-in metal probe(33)through the capacitance compensation metal appended patch(32). The invention introduces capacitance compensation, laminated structure and low dielectric constant to broaden the bandwidth of the microstrip antenna, making the relative bandwidth of the antenna reaching up to 20% and circular polarization ratio be less than 3dB within the range of the broadband.

The invention discloses a double-H slot coupling-based self-detection microstrip antenna array. The double-H slot coupling-based self-detection microstrip antenna array comprises at least seven layersof structures, wherein the structures are microstrip antenna units, a first dielectric plate, an antenna ground plate with double H slots, a second dielectric plate, a strip line layer which is provided with a coupling line, a third dielectric plate and a strip line ground plate which are sequentially arranged from top to bottom; the strip line layer and the second dielectric plate form a feedingnetwork; the double H slots in the antenna ground plate couple fed radio frequency energy to the microstrip antenna units; the coupling line transmits the vertically-polarized energy of each microstrip antenna unit to an output port by means of spatial coupling of electromagnetic fields in the second dielectric plate and the third dielectric plate; and the energy is compared with previously stored coupled energy data, so that whether the microstrip antenna units fail can be judged. According to the double-H slot coupling-based self-detection microstrip antenna array of the invention, the self-detection of the antenna array is realized through a coupling network. The antenna array has the advantages of low design complexity, high recognition efficiency of fault antenna units and the like.

The invention relates to a wide-frequency rat-race coupler based on novel composite right-left hand (CRLH) transmission line technology and a small MIMO system based on the rat-race coupler, so as to solve the technical problems that the prior rat-race coupler and the applied system are narrow in working bandwidth and large in size. The MIMO system is provided with a wide-frequency rat-race coupler; the wide-frequency rat-race coupler comprises three CRLH unit groups, that is, a first CRLH unit group, a second CRLH unit group and a third CRLH unit group; each group is formed by two CRLH units in connection to form a head end and a tail end; and each adjacent head end and the tail end of each group are connected to form a signal transmission port. The rat-race coupler of the invention can be widely applied to a Bulter matrix feed network, a microwave power synthesis and decomposition network, a sum-difference device, an isolator, a beam-adjustable antenna, an input/output system, any microstrip antenna array in need of decoupling and a multi-channel communication system.

The present invention discloses a solid-state atomic spin sensing structure surface stress noise ultra high precision test system. The system comprises a probe, the probe, the probe comprises a diamond substrate, a diamond NV color center waveguide is processed at the middle portion of the upper surface of the diamond substrate, a diamond refractive index matching layer coated with the NV color center waveguide is grown at the upper surface of the diamond substrate and is taken as a reflecting film, a microstrip antenna array is processed at the upper surface of the diamond substrate, a microstrip antenna port is arranged at the microstrip antenna array and is connected with a microwave source, and the upper surface of the microstrip antenna array is plated with a piezomagnetic film. The solid-state atomic spin sensing structure surface stress noise ultra high precision test system employs the diamond substrate embedded with the NV color center waveguide as a sensing unit, employs the laser to realize electronic energy level transition, the piezomagnetic film in a pressure probe is under external pressure through scanning of microwave to generate a magnetic field correlated to the size of the pressure, and the difference of microwave frequencies corresponding to two peak values of a fluorescence intensity spectral line is employed to perform calibration of pressure so as to realize ultrahigh precision measurement of the pressure.

The invention relates to the field of quantum sensing and particularly relates to a non-magnetic temperature control system of a solid-state atomic spin sensor. The system comprises a diamond substrate. The diamond substrate is provided with a diamond NV color-center waveguide (4). The diamond substrate is further provided with a porous magnetic PDMS film (3) configured to cover the diamond NV color-center waveguide (4). The two sides of the lower surface of the diamond substrate are provided with a micro-strip antenna array (2). The micro-strip antenna array (2) is connected with a microwave source. According to the technical scheme of the invention, a nitrogen-doped diamond structure, larger than 1018 cm<-1> in concentration, is prepared by adopting the MPCVD magneto-electric restraint method, and a diamond color-center structure is prepared by adopting the micro-nano processing technology. Therefore, the excitation and fluorescence collection of the NV color-center structure are realized. Meanwhile, the coplanar manufacturing of a microwave antenna is realized in combination with the electron beam processing method. Moreover, the high signal-to-noise ratio detection of magnetic variation signals is carried out by adopting the time sequence control method, so that the effect of a temperature-modulated magnetic field is realized. The magnetic noise is effectively inhibited, and the purpose of non-magnetic temperature control is achieved.

The invention provides a suspended microstrip antenna array for 60GHz millimeter wave communication and an antenna thereof. The antenna array comprises antenna units and a feed network. The antenna units are arranged in an upper and lower two-row mode; the number of the antenna elements is 2*(2n), and n is a positive integer; the feed network comprises impedance transformers, coplane duel-wires, coplane waveguides and power dividers connected with the coplane duel-wires and the coplane waveguides; each antenna element is connected with one impedance transformer; the impedance transformers of the uplink antenna elements of the antenna units and the impedance transformers of the downlink antenna elements are arranged oppositely; the coplane duel-wires are connected with the antenna units via the impedance transformers; one power divider is connected at the axial central position of each coplane duel-wire; and one end of the coplane duel-wire is connected with the power divider and the other end is provided with a feed port. The suspended microstrip antenna has the advantages that the bandwidth is wide, the radiation loss is small, and integration with a plane millimeter wave circuit is easy.

The invention discloses a small spacing microstrip antenna array comprising a dielectric substrate which is provided with a first surface and a second surface which are opposite to each other; a firstmicrostrip antenna and a second microstrip antenna which are arranged on the first surface of the dielectric substrate and spaced relative to each other in a first direction; and a resonant decoupling unit which comprises an open resonant ring formed by a microstrip line, wherein the open resonant ring is arranged on the first surface of the dielectric substrate and positioned between the first microstrip antenna and the second microstrip antenna. The coupling of the small spacing microstrip antenna can be suppressed.