60 results about "Patch array" patented technology

The present invention provides a dual board patch array antenna, comprising: a radio board; a first-layer antenna board and a second-layer antenna board; the ground plane of the radio board is in contact with the first radiation ground plane of the first-layer antenna board through a patch-type conductive pad to form an extended ground area of ground connection; the probes of the radio board pass through and contact the patch microwave transmission line of the first-layer antenna board to form an electrical connection; wherein the patch microwave transmission line is assigned to the antenna radiating element of the second-layer antenna board as a vertically polarized antenna and a horizontally polarized antenna; the antenna radiating element contacts the first radiation surface on the first-layer antenna board through the conductor pad on the first layer antenna board, so as to expand the radiation surface area of the dual board patch array antenna.

The broadband circular polarization conformal antenna adopts the combination of three layers of dielectric substrates and an air layer, and comprises an upper layer dielectric substrate, a middle layer dielectric substrate, a lower layer dielectric substrate, a central 2 * 2 corner cut square patch, a peripheral 16 corner cut square patch, a square feed patch with a rectangular groove formed along a diagonal line, a metal floor and a feed microstrip line, a metasurface structure is printed on the upper surface of the upper-layer dielectric substrate 1 and comprises a 2 * 2 corner cut square patch array 4 located in the center and 16 corner cut square patches 5 surrounding the center array; a square feed patch and a feed microstrip line are printed on the lower surface of the middle-layer dielectric substrate 2, the square feed patch is located at the dead center of the lower surface of the middle-layer dielectric substrate, and a rectangular groove is formed in the dead center of the square feed patch in the diagonal direction; and a complete metal floor is arranged on the lower surface of the lower dielectric substrate. The antenna has the characteristic of low profile, and the antenna can be conformal to a cylindrical surface carrier platform.

The application belongs to the technical field of antennas, and discloses an S / Ka-band common-aperture antenna and communication equipment, which comprises a first dielectric plate and a second dielectric plate stacked from top to bottom; the top surface, the middle and the bottom surface of the first dielectric plate are respectively provided with a rectangular patch array, a first metal through hole and a first metal layer; wherein the rectangular patch array, the first metal through hole and the first metal layer form a magneto-electric dipole antenna array; the magneto-electric dipole antenna array works in the Ka-band and is used for realizing satellite communication; the top surface, the middle and the bottom surface of the second dielectric plate are respectively provided with a second metal layer, a second metal through hole and a third metal layer; wherein the second metal layer, the second metal through hole and the third metal layer form a low-profile monopole antenna; the low-profile monopole antenna works in the S-band and is used for realizing ground equipment communication; the application has a simple structure, can realize different beams and polarization characteristics, effectively improves the space utilization rate of the antenna and has high integration.

A wave beam adjustable polarization reconfigurable broadband antenna based on a characteristic mode comprises a first dielectric plate, a second dielectric plate and a third dielectric plate from top to bottom in sequence, 3 * 3 square metal patch arrays arranged at equal intervals are printed on the upper surface of the first dielectric plate, a square driving patch is printed on the upper surface of the second dielectric plate, and a metal grounding plate is printed on the lower surface of the second dielectric plate. A feed network is printed on the lower surface of the third dielectric plate, and the square metal patch array and the square driving patch form a double-layer radiation structure, so that the antenna works in an unconventional electric field distribution mode, and the working bandwidth of the antenna is widened.

The invention discloses a C-band double-inductance circularly polarized leaky-wave antenna, and belongs to the technical field of microwave antennas. The parasitic patch regulates and controls the distribution of an electromagnetic field through the slotting design of the strip-shaped groove. The transmission line is located in the center of the dielectric substrate and keeps a reasonable interval with the parasitic patch to achieve a leaky wave function, and the metal floor serves as a reflecting surface to suppress back lobe radiation and improve forward gain. Through rotation of the strip-shaped groove at a groove angle of + / -10 degrees, left-hand circular polarization is realized in a frequency band of 6.235-6.583 GHz, and right-hand circular polarization is realized in a frequency band of 7.423-7.474 GHz. Meanwhile, by means of collaborative design of a parasitic patch array structure and a transmission line, a full-band S11lt is achieved; -10dB broadband impedance matching is achieved, and a main beam stably points to the vicinity of 22 degrees.

The invention discloses a multilayer FSS MIMO antenna integrating line circular polarization conversion and decoupling functions, which comprises two layers of dielectric plates and three layers of metal patch layers, the two layers of dielectric plates and the three layers of metal patch layers are formed by mixed pressing, the three layers of metal patch layers and the two layers of dielectric plates are arranged in a staggered manner, and the metal patch layers are in close contact with the dielectric plates; the antenna further comprises a lower dielectric plate, the bottom plate of the lower dielectric plate is provided with a metal ground layer, the surface of the lower dielectric plate is provided with a patch antenna, the metal ground layer is provided with a feed port, and the feed port is communicated with the bottom surface of the lower dielectric plate. The antenna is applied to the sub-6 GHz frequency band, the functions of linear circular polarization conversion and decoupling are achieved at the same time, high isolation can be kept between 3 * 3 patch array antenna units through metasurface loading, directional diagram distortion is improved, efficiency and gain loss are improved, and energy waste is reduced. After linear circular polarization conversion, the polarization mismatch sensitivity of the MIMO antenna can be reduced, the multipath suppression capability of the MIMO antenna is improved, and the channel capacity of the MIMO antenna is expanded.

The invention discloses a dual-polarization flexible transparent array antenna with high isolation and low side lobe performance. The dual-polarization flexible transparent array antenna comprises a dielectric substrate, a grounding layer and a radiation patch array. The dielectric substrate is made of polydimethylsiloxane (PDMS) with the thickness of 0.5 mm; according to the array antenna, 50-ohm microstrip line side feed power supply is adopted, an orthogonal series microstrip patch array is presented, a hollowed-out cross structure is adopted at the joint to excite a high-order mode, reverse current generated by the high-order mode is restrained at the same time, side lobes are effectively reduced, and the isolation degree of antenna gain and a dual-polarization port is improved; meanwhile, in order to further reduce side lobes, the gradually-changed patch width is adopted. The antenna is small in overall size, has the characteristics of low profile, high gain, high isolation and dual polarization, has good bending performance and transparency, and can be used as a beautified antenna for a millimeter wave wireless communication system.

Stacked patch array antenna 10, comprising; a first substrate 12 (e.g a ceramic); first array of patch radiators 16a arranged on first substrate; and second array of patch radiators 16b, each radiator

The application relates to an active electromagnetic energy selective surface, comprising a metal patch array, a diode array and a controlled feed structure; the metal patch array comprises a plurality of regularly-structured and spaced metal patches; the controlled feed structure comprises a first electrode patch and a second electrode patch; the diode array comprises a first diode array part and a second diode array part; along the transverse direction of the metal patch array, the first electrode patch is arranged on both sides of the metal patch array respectively, and the first diode array part is used for connecting adjacent metal patches and connecting adjacent metal patches and the first electrode patch; along the longitudinal direction of the metal patch array, the second electrode patch is arranged on both sides of the metal patch array respectively, and the second diode array part is used for connecting adjacent metal patches and connecting adjacent metal patches and the second electrode patch. The application effectively realizes the true receiving and transmitting compatibility of signals in the mode of introducing a bias circuit.

The invention discloses a conformal holographic metasurface antenna based on a double-layer cross embedded tensor unit, and aims to solve the problem of low surface wave-leaky wave conversion efficiency caused by inherent restriction of surface impedance modulation depth M and average impedance amplitude X of a traditional single-layer holographic metasurface antenna. An upper-layer and lower-layer cross-shaped groove patch array cross embedded topological structure is adopted, the vertical projection of a lower-layer unit is embedded into a gap region of an upper-layer unit, and the surface impedance dynamic modulation range is expanded under the sub-wavelength unit size by enhancing interlayer coupling, so that the leakage constant alpha is improved. On the basis of a holographic interference principle, surface impedance tensor modulation is realized by regulating and controlling geometric parameters of a unit, and a linearly polarized surface wave excited by a central feed source is efficiently converted into a right-handed circular polarization (RHCP) leakage wave beam with a specific angle at a frequency band of 26 GHz; in combination with a conformal mapping algorithm, the method is adaptive to a cylindrical surface with a curvature radius rho of 20-60mm, and has aperture efficiency gt; 39%, and the axial ratio is lt; 3dB, and the structure is compact.

The invention discloses a circularly polarized filtering grid slotted patch antenna based on a substrate integrated gap waveguide. The antenna adopts a multi-layer stacked structure and comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate and a fourth dielectric substrate which are arranged from top to bottom and bonding layers among the first dielectric substrate and the fourth dielectric substrate, four corner cut square patches are arranged on the upper surface of the first dielectric substrate, and two corner cut rectangular patches are arranged on the lower surface of the first dielectric substrate; the upper surface of the second dielectric substrate is provided with a cross strip and four parasitic strips, and the lower surface of the second dielectric substrate is provided with a circular ring; a rectangular metal patch with a gap is arranged on the upper surface of the third dielectric substrate, and a forked microstrip feed structure and two folding strips are arranged on the lower surface of the third dielectric substrate; the upper surface of the fourth dielectric substrate is provided with a circular metal patch array, the lower surface of the fourth dielectric substrate is provided with a rectangular metal patch as large as the fourth dielectric, and the upper surface and the lower surface of the fourth dielectric substrate are connected through a metal column to jointly form an electromagnetic band gap structure. The invention has excellent upper stop band suppression capability.

The application discloses a low-profile conformal low-scattering array antenna and belongs to the technical field of antennas. The low-profile conformal low-scattering array antenna comprises a metal bottom plate layer, a coupling feed layer, a microstrip radiation patch layer, a frequency selection layer and a polarization grid surface layer which are stacked in sequence. The microstrip radiation patch layer comprises a plurality of array patch arrays, each of which is composed of 2*2 radiation patches and forms a cross slot without contact between the radiation patches. The main body of the coupling feed layer is a cross strip. The projection of the cross strip on the microstrip radiation patch layer is located in the cross slot of the corresponding patch array, and the width of the cross strip is smaller than the width of the cross slot. A radio frequency connector is located on the metal bottom plate layer, the inner core of the radio frequency connector is connected with one end of the cross strip through the metal bottom plate layer, and the outer skin of the radio frequency connector is connected with the metal bottom plate. On the basis of guaranteeing the radiation performance of the array antenna, the low-profile conformal low-scattering array antenna can realize wide-band, wide-angle domain RCS reduction of the array antenna.

The embodiment of the invention discloses a low-profile dual-frequency common-caliber antenna unit and antenna array sharing a radiation structure, and relates to the technical field of antennae, and the antenna unit comprises a radiation layer, a grounding layer and a feed layer. The radiation layer comprises a radiation patch array and a dielectric substrate; the grounding layer is tightly attached to the radiation layer, and the grounding layer is provided with a coupling gap; the feed layer comprises a low-frequency feed line, a high-frequency feed line and a dielectric substrate, the feed layer is tightly attached to the grounding layer through the dielectric substrate, and the low-frequency feed line and the coupling gap form a low-frequency feed structure which is used for exciting all the radiation patch arrays to output low-frequency signals; and the high-frequency feed line and the coupling gap form a high-frequency feed structure which is used for exciting the local radiation patch array to output a high-frequency signal. According to the embodiment of the invention, dual-band directional and broadband radiation characteristics can be realized at the same time, array expansion is supported, and dual-band main lobe beam deflection and scanning can be realized. Compared with an existing antenna, the antenna has the advantages in structural multiplexing efficiency, profile control and dual-frequency common-caliber integration.

The invention discloses a high-isolation single-layer microstrip antenna and an array. The antenna structure comprises at least two radiation microstrip patches, two coupling microstrip strips, a dielectric layer, a grounding layer and a gap etched in the grounding layer. The high-isolation microstrip antenna array further comprises a first feed probe and a second feed probe, and the first feed probe and the second feed probe penetrate through the dielectric layer and are connected with the first feed points and the second feed points of the two radiation patches respectively. And the coupling microstrip strip is in capacitive coupling with the patch, and parallel resonance is formed at a required resonance frequency point, so that electromagnetic coupling between the first feeding point and the second feeding point is inhibited. The gaps etched on the grounding layer are located among the units, so that the isolation of the antenna array can be further improved. High isolation between patch arrays can be achieved under the condition that patch characteristic impedance is hardly affected, and meanwhile the patch array has the advantages of being single in layer, small in size and simple in structure.

This invention provides a method, system, and computer equipment for the detection and classification of hyperspectral anomalies in Chinese medicinal materials, relating to the field of Chinese medicinal material testing. The method includes: reading hyperspectral data; performing foreground detection on the hyperspectral data using a multi-scale spatial spectrum fusion method to obtain a foreground mask of the abnormal region; automatically sampling with three-dimensional patches to collect N three-dimensional patch arrays of the foreground mask region; setting up a three-dimensional convolutional neural network with a band self-attention mechanism, inputting the foreground mask and the three-dimensional patch arrays into the neural network to generate a high-level semantic feature vector; and finally outputting the classification result by passing the high-level semantic feature vector through a neighborhood spatial spectrum-based self-supervised aggregation attention module. This invention, employing the above-mentioned method, system, and computer equipment for the detection and classification of hyperspectral anomalies in Chinese medicinal materials, achieves a new, efficient, accurate, and automated method for detecting mold and insect infestation in Chinese medicinal materials, significantly improving detection quality and the system's practical value.

This invention provides an antenna with good antenna characteristics in a specific frequency band, a method for manufacturing the same, and a method for using the same. [Solution] An antenna for radar used in a frequency band of 70 GHz to 90 GHz, wherein the antenna is a patch array antenna, the antenna has a dielectric layer, the dielectric layer is a fluororesin sheet, the oxygen element ratio measured by X-ray photoelectron spectroscopy (XPS) on one or both sides of the fluororesin sheet is 3.0 atomic% or more, and the coefficient of linear expansion (CTE) of the fluororesin sheet is 100 ppm / °C or less.

Embodiments of the present disclosure provide an antenna device. The antenna device includes a dielectric substrate and a series-connected patched array antenna. The series-connected patched array antenna includes a plurality of patched antennas aligned in a predetermined direction on the dielectric substrate and connected in series. Also, the series-connected patched array antenna includes a plurality of transmission lines connecting adjacent patched antennas of the plurality of patched antennas. Furthermore, for each patched antenna of the plurality of patched antennas, a width of the patch antenna is different from a width of an adjacent patched antenna, on either side, in the predetermined direction. Also, a plurality of line lengths of the plurality of respective transmission lines varies along the predetermined direction.

A metasurface device includes an antenna element formed on the front surface of a substrate, the antenna element comprising a two-dimensional array of electrically conductive patches spaced from one another and having dimensions smaller than the operating wavelength of an emission and / or reception device, the antenna element being able to radiate in a direction having a component perpendicular to the front surface of the substrate when the ground structure has a ground plane function, the substrate comprising a layer, called a connection layer, made of photoconductive semiconductor material, in direct physical contact with the conductive patches, the semiconductor material being insulating when it is not illuminated and able to be conductive when it is illuminated at a reconfiguration wavelength.

The application discloses a Ka-band conical beam antenna, which is composed of a single-layer metal floor, a coaxial probe, a single-layer dielectric substrate and an antenna patch array. The single-layer metal floor is rectangular, a metal through hole is arranged at the center of the floor, an SMA joint is arranged at the bottom of the floor, the SMA joint is in contact with the floor and is connected with the coaxial probe. The upper layer of the dielectric substrate is the antenna patch array. The whole antenna is composed of eight impedance-matched antenna patch units on the dielectric substrate to form a Chinese character-shaped pattern. Each patch unit is composed of a rectangular microstrip antenna, a parasitic capacitance ring, a transmission microstrip line and an impedance-matching microstrip line. The antenna is connected with a signal from the SMA joint through the coaxial probe penetrating through the single-layer dielectric substrate and the single-layer metal floor. The application can realize the design requirements of a wide beam, high gain and low side lobe.

Embodiments of an antenna are provided. The antenna has a substrate with a first major surface and a second major surface. A ground plane is spatially disposed a first distance from the second major surface of the substrate, and a patch array is disposed on the second major surface between the substrate and the ground plane. Patches of the patch array are made of a material having a conductivity of 1×106 S / m or more, and the patches of the patch array are printed onto the second major surface of the substrate.

A microstrip filter includes a first substrate (11) and a second substrate (12) disposed oppositely, and a dielectric layer (13) disposed between the first substrate (11) and the second substrate (12). The first substrate (11) includes a first base substrate (110) and a patch array disposed on a side of the first base substrate (110) close to the dielectric layer (13). The second substrate (12) includes a second base substrate (120), a microstrip line (121) disposed on a side of the second base substrate (120) close to the dielectric layer (13), and a ground layer (122) disposed on a side of the second base substrate (120) away from the microstrip line (121). The microstrip line (121) includes a main transmission line (1211) and at least one branch (1212). An orthographic projection of the branch (1212) of the microstrip line (121) on the first base substrate overlaps with an orthographic projection of the patch array on the first base substrate (110), and the dielectric layer (13) is configured to adjust a resonant frequency between the patch array and the microstrip line (121) when a voltage is applied to the patch (111) of the patch array.

This invention discloses a pixel array-based reconfigurable planar microwave device based on vanadium dioxide phase change thin film, belonging to the field of microwave device technology. The device includes a dielectric substrate, a metal ground plane, and a phase change patch array disposed on the dielectric substrate. The phase change patch array is composed of multiple vanadium dioxide thin film units. Each vanadium dioxide thin film unit has Cu thin film electrodes around its perimeter. The outer and inner electrodes are connected to pads via upper metal wiring, vias, and lower metal wiring, respectively, to form a localized current-carrying loop. The Joule heating generated by this localized current-carrying loop achieves selective phase change of the target vanadium dioxide thin film unit, forming different planar microwave conductive paths on the same device platform. This device features high structural integration, clear unit control, and good platform reusability.

The application discloses an etching microstrip line type broadband beam patch array antenna based on side edge feeding, which comprises an antenna array layer, an integrated waveguide layer and a grounding layer arranged in sequence; the antenna array layer is composed of linear arrangement of a plurality of antenna units; the antenna unit comprises a feeding line, one end of the feeding line is connected with a rectangular transmission line, and one side of the rectangular transmission line is connected with a plurality of radiation units; the rectangular transmission line is provided with a first rectangular groove, a second rectangular groove and a third rectangular groove, thereby forming an H-shaped feeding network for side edge feeding of the plurality of radiation units. The array antenna of the application works in a 75GHz-85GHz frequency range, the beam width of an E plane is from -22° to 24°, the beam width of an H plane is from -40° to 40°, and the beam width is from -18° to 24° at 78GHz, thereby realizing wide band and wide beam of the E plane and the H plane in the millimeter wave frequency range.

The invention relates to a metasurface Fabry-Perot resonant cavity antenna with a tunable RCS (radar cross section). The metasurface Fabry-Perot resonant cavity antenna sequentially comprises a coaxial line feed structure, a metal reflection bottom plate, a lower dielectric substrate, a middle air layer and a partial reflection layer dielectric substrate from bottom to top, the lower dielectric substrate is integrated with a square patch array and a central radiation structure, and coaxial line feed is coupled with the lower dielectric substrate; a metasurface array and a pin tube are arranged on the upper surface of the partial reflection layer substrate, a partial reflection layer patch array is arranged on the lower surface of the partial reflection layer substrate, and the middle air layer, the reflection bottom plate and the partial reflection layer form a Fabry-Perot resonant cavity. The 0-300 ohm dynamic impedance regulation RCS is realized through the radial pin tubes, and the radiation performance is prevented from being influenced by the design that no pin tube is arranged in a central region. According to the design, the RCS reduction amount is continuously adjustable in the frequency band of 6-12 GHz, the height of the antenna is reduced by 40%, the problems of RCS fixation and radiation scattering conflict of a traditional antenna are solved, and the stealth adaptability and survivability of equipment are improved.

The invention discloses a millimeter wave antenna based on a dielectric integrated waveguide slot, and the antenna comprises a radiation unit and a feed structure, and the radiation unit and the feed structure are oppositely arranged. The radiation unit comprises a first dielectric plate and a patch array, and the patch array is arranged on the upper surface of the first dielectric plate; the feed structure comprises a first metal layer, a second dielectric plate, a second metal layer and a metal probe; the first metal layer is arranged at the bottom of the second dielectric plate, the second metal layer is arranged on the upper surface of the second dielectric plate, the second metal layer and the first dielectric plate are oppositely arranged, and a gap is etched in the surface of the second metal layer to serve as a radiator; the metal probe is arranged at a position deviating from the center of the second dielectric plate; the second metal layer is provided with a plurality of metal through holes, and each metal through hole, the first metal layer and the second metal layer form a closed medium integrated cavity. According to the invention, the feed network of the millimeter wave array antenna can be effectively simplified, the loss of the feed network is reduced, and the overall efficiency is improved.

The invention belongs to the technical field of image processing, and discloses a three-dimensional model surface reconstruction method, which comprises the following steps of: constructing a general cube reconstruction index table which comprises all combinations of six patches of a cube participating in reconstruction and corresponding patch reconstruction masks, vertex reconstruction masks and vertex indexes; the patch reconstruction mask is a six-bit binary number, and the patch corresponding to the bit with the value of 1 participates in reconstruction; the vertex reconstruction mask is an eight-bit binary number, and the vertex corresponding to the bit with the value of 1 participates in reconstruction; obtaining three-dimensional volume data, wherein each voxel has a three-dimensional index and a binary state; acquiring a patch reconstruction mask by a binary state of adjacent voxels, wherein the patch reconstruction mask is a reconstructed effective voxel when the patch reconstruction mask is greater than 0; obtaining a reconstruction effective voxel set and a patch reconstruction mask set, and obtaining a patch array set and a vertex coordinate set participating in reconstruction according to the reconstruction effective voxel set and the patch reconstruction mask set and the general cube reconstruction index table; the patch array is a global index of four vertexes forming the reconstructed patch; and constructing a reconstructed surface model. And the generation efficiency and speed of the dynamic surface model are improved.

The invention discloses a common-caliber base station antenna with ultra-wide impedance and wave-transparent bandwidth, which comprises a low-frequency antenna, four high-frequency antennas and a rectangular reflection ground, the four high-frequency antennas are respectively arranged at four corner ends of the low-frequency antenna, and the rectangular reflection ground is arranged at the lowest part of the whole antenna array. The low-frequency antenna is of a double-layer structure, the lower-layer structure comprises four annular radiation arms which are arranged in a central symmetry mode, each annular radiation arm is of an impedance stepped transformation structure, and-14 dB impedance matching within the frequency band of 617 MHz to 960 MHz is achieved through impedance gradual change. The inner side of the annular radiation arm is connected with a plurality of filtering branches, and a 2 * 2 patch array is arranged in the center of the inner side; the upper layer structure comprises a 3 * 3 patch array right facing the center of the inner side of the annular radiation arm. And the filtering branches and the double-layer patch array cooperate to form a wave-transparent structure, so that 1710-2690 MHz broadband wave-transparent is realized.

The invention belongs to the field of wireless energy transmission, and discloses a 2.45 GHz and 5.8 GHz double-frequency flexible antenna array for wireless microwave energy transmission, which comprises a dielectric substrate, a patch array, a feed interface, an equivalent grounding plate, a metasurface layer and an EBG (Electromagnetic Band Gap) structure, the antenna structure is printed on one side of the dielectric substrate and is excited in a coaxial feed mode, an air layer is arranged between the two substrates, a certain distance is reserved between the two patches from side to side, and the two patches are subjected to 2 * 2 array expansion, so that a double-frequency flexible antenna array is formed. The dual-frequency antenna designed by the invention can work in different frequency bands, and can realize better performance and compatibility. And a flexible material and liquid metal are adopted, so that certain self-adaptability is achieved. By optimizing the design of the EBG structure, the isolation degree between the ports at the two working frequency points is remarkably improved, the mutual interference between the ports is effectively reduced, and the stable performance of the antenna array is ensured.

The invention discloses a miniaturized low-profile metasurface antenna which comprises an upper-layer metal patch array, an upper-layer dielectric substrate, a lower-layer metal patch array, a middle-layer dielectric substrate, a metal ground, a lower-layer dielectric substrate and a metal feeder which are sequentially arranged from top to bottom, the upper-layer metal patch array comprises 21 upper-layer metal patches which are uniformly distributed in 7 rows and 3 columns; the lower-layer metal patch array comprises 14 lower-layer metal patches which are positioned right below the 14 upper-layer column gaps and are uniformly distributed in 7 rows and 2 columns; the center of the metal ground is provided with a radiation gap, and the radiation gap is located on the symmetric plane of the two columns of lower metal patches and is smaller than the column gap of the lower metal patches. The lower layer metal patch array is arranged below the upper layer metal patch array, so that capacitive coupling between the upper layer metal patch and the lower layer metal patch is increased, reduction of the antenna size is equivalently achieved, meanwhile, the good low-profile characteristic is kept, and the problem that a traditional metasurface antenna is large in size is solved.