99results about How to "Low profile" patented technology

The invention discloses a radiation-receiving type low-profile dual-beam array antenna and a folding decoupling design method. The low-profile dual-beam array antenna is composed of a transmission metasurface, a polarization conversion metasurface and a horn feed source. The transmission metasurface is formed by periodically extending and arranging m * m radiation-receiving units in a plane at equal intervals, and efficient transmission and spin decoupling focusing phase regulation and control of electromagnetic waves of a specific frequency band are achieved. The radiation-receiving unit is composed of three layers of metal and two layers of dielectric plates. The polarization conversion metasurface is formed by periodically extending and arranging n * n polarization conversion units in a plane at equal intervals, and efficient reflection, polarization conversion and wave beam non-mirror image deflection phase regulation and control of electromagnetic waves of a specific frequency band are achieved. The polarization conversion unit is composed of two layers of metal and a layer of dielectric plate. The low-profile dual-beam array antenna provided by the invention can generate two independently regulated orthogonal circularly polarized waves through spin decoupling under the excitation of a circularly polarized wave feed source, and has the remarkable advantages of high aperture efficiency, low profile and the like.

The invention discloses a directional diagram reconfigurable antenna capable of switching feed through an MEMS switch, and belongs to the field of radio frequency front-end devices. The directional diagram reconfigurable antenna is composed of a micro-strip radiation unit, a guide parasitic unit, a composite beam ohmic contact type MEMS switch, a one-to-four feed network, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradual change micro-strip line, a dielectric substrate and a metal ground backboard. The two-stage MEMS switches are erected on the one-to-four feed network, when the two-stage switches on a certain feeder line are turned on, radio frequency current can flow to the corresponding basic radiation unit through the feeder line to generate an inclined beam facing the quadrant, and the two basic radiation units on the front side can be enabled by simultaneously turning on the four switches on the front side to generate an inclined beam facing the quadrant. And generating an inclined beam in the front side positive direction. The antenna adopts a single-layer board design, the dielectric substrate does not need to be punched, the structure is simple, manufacturing is convenient, the adopted MEMS switch is small in loss and high in isolation degree, and rapid printing and manufacturing can be achieved through the surface etching process.

The invention provides a K-band broadband dual circularly polarized antenna applied to the satellite internet, and belongs to the field of circularly polarized antennae, the K-band broadband dual circularly polarized antenna comprises a radiation unit, a first dielectric layer, a metal ground layer, a bonding layer, a second dielectric layer and a feed network which are stacked from top to bottom, the radiation unit comprises two first radiation patches and two second radiation patches, the first radiation patch is provided with two long rectangular grooves which are vertically intersected, the second radiation patch is provided with two short rectangular grooves which are vertically not intersected, the first radiation patch and the second radiation patch are respectively connected to the metal ground layer through metal columns, and the metal ground layer is provided with a first coupling gap and a second coupling gap. A first rectangular groove, a second rectangular groove, a third rectangular groove and a fourth rectangular groove are formed in the metal ground layer, and the feeder network comprises a first microstrip feeder and a second microstrip feeder; the antenna structure is low in profile, wide impedance bandwidth can be achieved, and the two feed ports can work in the same frequency range.

The invention discloses an attitude synchronization method for landing of a ship-borne rotor unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicle landing regulation and control, and the method comprises the following steps: 1, firstly, respectively collecting data of a ship-borne AHRS system and an airborne sensor, and after the data collection is completed, carrying out attitude synchronization on the ship-borne AHRS system and the airborne sensor; the data of the ship-descending AHRS system and the data collected by the airborne sensor are fused, and the relative attitude deviation and the position deviation of the ship are estimated after fusion. According to the method, the requirement of the ship-based unmanned aerial vehicle for a landing window in the landing stage is lowered, the computing power requirement for an airborne computer of a mobile platform is lowered, cost, weight and energy consumption are saved, higher safety is achieved, the collision risk caused by ship attitude changes in the landing process is reduced, the automation degree of landing is improved, and the probability that manual catching is needed is lowered.

The invention discloses a terahertz wave band circularly polarized antenna based on sequential rotation feeding, and belongs to the field of radio frequency front-end devices. The circularly polarized antenna is composed of four microstrip patches, chamfers located on a radiation patch, a microstrip line, a microstrip line feed port, a sequential rotation feed network, a dielectric substrate, a metal ground backboard and a microstrip line matching structure. A 90-degree phase difference is generated by strictly designing the electrical length from each port to the feed network to realize circular polarization performance, right-handed circularly polarized waves are radiated, the radiation gain is 10.47 dB, the 3dB axial ratio bandwidth is greater than 8GHZ, the 3dB axial ratio range exceeds 90 degrees, and the complete half-power beam width is covered. The antenna adopts the microstrip line for feeding, the loss of the microstrip line is small, the microwave transmission characteristic is good, and the antenna radiation efficiency is high. The antenna adopts a single-layer board design, has no complex feed network, and is simple in structure and convenient to manufacture.

The invention discloses a narrow pulse ns-level time delay compensation type plane reflection array antenna, and belongs to the technical field of antennas. The array antenna comprises a reflective array antenna and a feed source, and each array element in the reflective array antenna performs corresponding time delay compensation on electromagnetic waves emitted by the feed source according to the distance between the array element and the feed source so as to improve the gain of a reflective wave beam in an expected direction. According to the invention, a time delay type compensation method is adopted to enable the pulse signals fed into the plane reflection antenna array to realize simultaneous, equal-amplitude and same-phase superposition in a far field, so that the time domain pulse distortion phenomenon is avoided, the time delay compensation of electromagnetic waves fed into the plane reflection antenna array can be effectively realized, and the antenna gain and the fidelity of received signals are improved.

The invention discloses a millimeter wave polarization and directional diagram reconfigurable antenna, and belongs to the field of radio frequency front-end devices. The antenna is composed of symmetrical rectangular radiation patches, and a semicircular defect, a quarter circle defect, a rectangular branch load, an orthogonal bidirectional feed network, a T-shaped power dividing feed network, a composite beam ohmic contact type MEMS switch, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradient matching structure, a dielectric substrate and a metal ground backboard which are located on the radiation patches. When the single-side MEMS switch on the T-shaped power dividing feed network is switched on, energy flows to the radiation unit on the side, and the leftward or rightward wave beam inclination effect can be achieved. When the MEMS on the two sides are both switched on, the radiation pattern points to the Z positive axis, no beam deflection exists, and therefore the pattern reconfigurable function in the left direction, the middle direction and the right direction can be achieved. When a switch on the orthogonal bidirectional feed network is closed, the size of the long line can realize 90-degree phase delay, and two orthogonal degenerate modes are synthesized into a circularly polarized wave to cover a complete half-power beam width.

The invention discloses a polarization conversion wave-absorbing ultra-wideband stealth metasurface structure which comprises a polarization conversion layer, a first filling layer, a frequency selection surface layer, a second filling layer and a wave-absorbing layer which are sequentially arranged from top to bottom. The polarization conversion layer comprises a polarization conversion patch, the polarization conversion patch comprises a plurality of 2 * 2 subarrays, and the angle arrangement difference between adjacent 2 * 2 units is 90 degrees. The frequency selective surface layer comprises a first patch, a second patch and a third patch which are sequentially arranged from top to bottom. The wave absorbing layer comprises a resistive film patch, and the impedance of the wave absorbing layer is matched with that of the second filling layer.

The invention discloses an integrated low-profile broadband programmable metasurface antenna which comprises an antenna cover, an integrated low-profile programmable metasurface and a structural frame. The integrated low-profile programmable metasurface comprises an integrated low-profile programmable metasurface array surface; the integrated low-profile programmable metasurface array surface comprises a plurality of integrated low-profile programmable metasurface units; the integrated low-profile programmable metasurface unit is sequentially provided with a metal radiation patch, an upper dielectric substrate, a bias control line layer, a semi-cured bonding sheet layer and a strip line feed network layer; the metal radiation patch is printed on the front side of the upper dielectric substrate, the bias control line layer is printed on the rear side of the upper dielectric substrate, and the upper dielectric substrate is bonded with the strip line feed network layer through the semi-cured bonding sheet layer. The invention has the advantages of low profile, low power consumption and light weight; the antenna is high in radiation efficiency, and is suitable for the military fields of satellite communication, navigation, unmanned aerial vehicle data link terminals and the like with beam scanning and tracking capabilities.

The invention provides a low-profile indoor distribution antenna, and relates to the technical field of antennae, the low-profile indoor distribution antenna comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate and a fourth dielectric substrate which are connected in sequence, each structure is compact, and a low-profile effect is realized. Moreover, the plurality of first short-circuit columns, the plurality of second short-circuit columns and the plurality of third short-circuit columns are all distributed in a semicircular manner, so that the roundness of a directional diagram of a radiation signal can be improved. Due to the existence of the second resonant cavity, the function of frequency selection and filtering is realized, so that the low-profile indoor distribution antenna is integrated with the pilot frequency decoupling capability. Compared with the existing quasi-omnidirectional antenna, the low-profile indoor distribution antenna has the advantages of high performance, low profile and simple structure in addition to realizing the out-of-band harmonic suppression function, and realizes the integration and function fusion of the antenna and the filter.

The invention discloses a waveguide power dividing device with a ridge on an H surface and a waveguide antenna, and belongs to the technical field of antennae, the waveguide power dividing device comprises a waveguide power divider, the waveguide power divider adopts a T-shaped structure, the waveguide power divider is provided with a waveguide transmission line, a branch waveguide A and a branch waveguide B, and the ridge is arranged on the H surface of the waveguide power divider; the feed end of the waveguide transmission line is used for feeding, the radiation end of the branch waveguide A and the radiation end of the branch waveguide B are used for radiation, and the electric fields of the radiation end of the branch waveguide A and the radiation end of the branch waveguide B are in the same phase. According to the invention, the problem that the directions of electric fields are opposite when H-plane waveguide feed passes through a one-to-two power divider is solved. According to the waveguide antenna, the waveguide power divider with the H face and the ridge is adopted, the complex structure of waveguide E-to-H is simplified, and meanwhile the profile of the antenna can be further reduced; the waveguide antenna provided by the invention has the characteristics of ultra wide band, wide beam, low side lobe and the like.

The invention discloses a low-profile dual-circularly-polarized Ka-band phased-array antenna which mainly solves the problems that a traditional circularly-polarized phased-array antenna is high in profile, complex in structure and incapable of polarization multiplexing. The antenna feed structure and the metal patch structure are symmetrical, the left-hand and right-hand circular polarization feed ports are directly connected with the radiation patch to excite the patch to generate left-hand circular polarization and right-hand circular polarization respectively, regulation and control from single circular polarization to dual circular polarization are achieved, the left-hand and right-hand circular polarization feed ports are directly connected with the radiation patch, and the radiation patch is directly connected with the left-hand and right-hand circular polarization feed ports. The patches are excited to generate left-hand circular polarization and right-hand circular polarization respectively, other extra structures are not introduced, the antenna design process is simplified, and polarization multiplexing of the circularly polarized antenna is achieved. The antenna is composed of the two layers of dielectric plates, a complex middle feed network is omitted, and the antenna has the advantages of being simple in structure and low in profile.

The invention relates to an ultra-wideband flexible transparent ultra-thin metamaterial wave absorber, which solves the problems of low profile, wide bandwidth and insensitive polarization and angle of the wave absorber, and belongs to the field of electromagnetic metamaterials. The antenna comprises a first dielectric layer, a second dielectric layer and a third dielectric layer which are sequentially arranged from bottom to top, the first dielectric layer and the third dielectric layer are PET substrates; the second dielectric layer is a PVC layer; the upper surface of the third dielectric layer is provided with conductive film units which are arranged periodically, and the lower surface of the first dielectric layer is covered with a conductive film. The upper surface of the third dielectric layer is provided with four conductive thin film units which are periodically arranged, and each conductive thin film unit is an ITO resistive thin film with a cross-shaped pattern. According to the invention, the flexible PVC is used as the dielectric substrate, the PET is used as the reflection bottom plate and the resonance layer, and the conductive film pattern of the resonance layer is optimally designed, so that the absorption performance of which the absorption rate is greater than 90% is realized within the frequency range of 12.02-102.91 GHz, and the relative absorption bandwidth can reach 158.1%.

The invention relates to the technical field of wireless communication, and discloses a low-orbit satellite communication Ku frequency band antenna, which is characterized by comprising a primary radiation patch, a secondary coupling radiation patch, a radiation aperture surface, a first broadband feed network layer, a coupling matching cavity layer, a second broadband feed network layer and a standard waveguide assembly, the working bandwidth of the antenna is improved based on a new form of combining the broadband feed network and the coupling metal cavity; the antenna can work normally in a Ku frequency band range; through the design of loading, stacking and the like, the antenna radiation layer, the coupling layer and the feed layer are located on the same plane, and the profile of the antenna is reduced; when the design is connected and integrated with other circuit systems, the overall profile of the antenna can be reduced; the antenna is compact in structure, convenient to assemble, excellent in electrical performance, high in antenna gain, wide in bandwidth, high in polarization purity, simple in structure and light in weight.

This invention belongs to the field of microwave communication technology, specifically relating to a PIFA antenna for 5G dual-band coverage. The invention includes a rectangular metal patch on a top surface, a substrate, and a metal ground plane stacked from top to bottom. A row of grounding vias is disposed through the substrate, and this array of grounding vias is located at the lower end of one side of the rectangular metal patch on the top surface. A coaxial feeding structure is disposed below the rectangular metal patch on the top surface. The antenna excites its fundamental mode TM through the coaxial feeding structure. 0.5,0 Mode and three higher-order modes TM 0.5,1 Pattern, TM 0.5,2 Pattern, and TM 0.5,3 The pattern includes a rectangular metal patch on the upper surface with a first slot along its vertical center line; the first slot has an opening on the side furthest from the grounding via for adjusting the TM. 0.5,1 Pattern and TM 0.5,3 The resonant frequency of the mode; a pair of second slits are orthogonally arranged on both sides of the first slit; the second slits are used to modulate the TM. 0.5,0 Pattern and TM 0.5,2 The resonant frequency of the mode. The antenna design proposed in this invention has advantages such as simple structure, relatively wide dual-band coverage, small size, and low profile.

The invention discloses a low-profile ultra-wideband time-domain antenna, and the antenna comprises an installation platform which is provided with a rectangular metal cavity at a top opening position, and the rectangular metal cavity is used for transmitting or receiving electromagnetic waves; the antenna is arranged in the rectangular metal cavity, and the antenna is used for receiving or transmitting horizontally polarized electromagnetic waves; the antenna comprises an SSMA connector, a radiation metal sheet and a chip resistor, the SSMA connector is assembled on the radiation metal sheet, and the radiation metal sheet is provided with the chip resistor; a radiation main body of the radiation metal sheet is an asymmetric heterogeneous metal sheet, a feed matching groove, a structure transition groove and a radiation groove are arranged in the radiation main body, and the radiation main body is bent. The antenna is novel in structural form, simple and reliable, achieves the performances of ultra wide band, low profile, miniaturization, specific wave beam coverage range and the like, and has a wide popularization prospect.

The invention provides a flush toilet capable of suppressing water leakage outside a machine and reliably reducing the risk that a water supply part is submerged by overflow washing water while achieving low profile. Specifically, the flush toilet according to the present invention is provided with a toilet main body and a flush water supply device for supplying flush water to the toilet main body, the flush water supply device being provided with: a water supply unit for supplying flush water supplied from a water supply source; a water storage tank which is provided to the rear or lower part of the toilet main body and which stores the washing water supplied from the water supply unit; a pump which sucks the washing water in the water storage tank and enables the washing water to flow to the toilet main body; and a plurality of overflow flow paths for overflowing the washing water exceeding the predetermined water level in the water storage tank to different positions, at least one flow path among the plurality of overflow flow paths being disposed below the upper surface of the inner edge portion of the toilet body.

The application discloses a medium strip MIMO filtering antenna with self-decoupling characteristics, and a 1*2 antenna unit array structure comprises two high dielectric constant medium strip resonators of a top layer, an upper layer low dielectric constant substrate layer, two metal strip structures of a middle layer, a lower layer low dielectric constant substrate layer, a metal ground layer and a bottom layer feeding structure. The two high dielectric constant medium strip resonators are arranged above the upper layer low dielectric constant substrate layer and arranged in an E plane; the two metal strip structures of the middle layer are respectively opposite to the two high dielectric constant medium strip resonators. A half-wave length mode of a signal is fed into the middle layer metal strip to excite a TM 10 mode of the top layer medium strip through coupling, so as to form a radiation band with two resonance points, and the two medium strip resonators are respectively arranged in a weak field area of each other, so that the designed antenna has filtering and decoupling functions at the same time, and a low profile and high efficiency effect are achieved.

This invention discloses a broadband circularly polarized integrated feed transmission array antenna covering the entire Ka-band, comprising an array surface and an integrated feed. The phase center of the integrated feed coincides with the focal point of the array surface, illuminating the array surface perpendicularly and forming a 45-degree angle with the array surface in the horizontal direction. The array surface comprises multiple array elements of different sizes arranged linearly. Each array element includes two orthogonally arranged first and second dielectric substrates, which have the same height but different thicknesses. The integrated feed comprises a stacked first and second PCB board. A substrate integrated waveguide is disposed on the first PCB board with coupling slots, and a substrate integrated waveguide cavity and annular metal patches surrounding the substrate integrated waveguide cavity are disposed on the second PCB board. This invention achieves a wide axial ratio bandwidth and gain bandwidth, and has the advantages of low profile, light weight, easy fabrication, and low cost.

The present invention provides a satellite-borne dual-band common-surface antenna array based on a metal structure. The antenna array is a metal structure and is divided into two parts. One part is a hollow frame structure, which adopts a Vivaldi structure antenna form. Through the design of structural folding, structural hollowing, coupling between units, etc., the antenna has good electrical performance in the P band; the other part is embedded between the P-band antenna units and is located at the bottom of the overall structure. It serves as a metal floor of the P band and can also realize the slot radiation waveguide of the X-band electrical performance. The present invention also designs the dual-band antenna arrays into a dual-polarization form, in order to avoid polarization rotation caused by multipath reflection when electromagnetic waves penetrate dense plants, thereby generating polarization mismatch.

The invention discloses a power-consumption-free magnetic control programmable metasurface which comprises a magnetic switch and a metasurface parasitic matching structure on the upper layer, a dielectric layer on the middle layer and a metal ground on the lower layer. Through the metasurface parasitic matching structure, the on-off of the magnetic switch is matched to a 1-bit phase regulation state when a space wave is incident. The reconfigurable metasurface is programmed through a static magnetic field, the functions of wave beam regulation and control and the like in a power-consumption-free scene are achieved, the magnetic control metasurface is simple in structure and low in cost, tail bias circuit design is not needed, and meanwhile the problem of power consumption during large-scale layout of the programmable intelligent metasurface is solved.

The application discloses a compact planar Van Atta array loaded with cross structure, comprising 2N 2 antenna pairs, each of which is composed of two antenna units as receiving unit and transmitting unit respectively, wherein at least two antenna pairs are connected by a cross structure, each cross structure connects two antenna pairs, the cross structure is formed by cascading two branch line couplers, has the characteristic that signals are transmitted only along diagonal ports, and the connection line length of the cross structure and the antenna units is adjusted, so that the two antenna pairs connected by the cross structure have equal phase. The application connects the antenna pairs by the cross structure, so that the structure of the planar Van Atta array is more compact and is easy to integrate; the direction backtracking function can be realized by only using a single-layer structure, the antenna profile is lower, the antenna does not need to be perforated, the cost is lower, and the application can be applied to a two-dimensional array, so that the application prospect is wider.

The present invention discloses a millimeter-wave differentially fed dual-polarized wide-beam magnetoelectric dipole antenna. The antenna comprises four square metal patches, a differential coaxial feeding structure, four groups of metal vias, a dielectric substrate, a metal floor and a vertical metal fence; the differential coaxial feeding structure comprises a cross-shaped metal patch and four feeding coaxial lines under the metal floor. The present invention adopts the form of differential dual-polarized coaxial feeding, and has the characteristics of low cross-polarization and good polarization diversity capability. By adding vertical metal column fences around the magnetoelectric dipole antenna, it has the characteristics of a wide beam. The present invention can be applied to linear phased arrays, and the bandwidth can cover the 5G millimeter-wave frequency band.

The application discloses a millimeter wave flat plate slot array antenna with a filtering function, and relates to the technical field of radio frequency communication. The copper-based micro coaxial line-quasi-planar waveguide transition structure is connected with the staggered vertical layout cross-coupled millimeter wave filter, and is integrated with the quasi-planar waveguide feed power division network to realize a three-dimensional quasi-planar low-loss integrated feed circuit, and the feed circuit excites the high-mode flat plate slot antenna array through a coupling slot. The application utilizes the multi-layer metal plane and vertical design capability of electrochemical additive technology, breaks through the key problems of low-process-complexity low-loss interconnection integrated transition interface, low-loss miniaturized filtering structure and array antenna remaining limited special-shaped physical space integrated, and meets the actual application requirements of miniaturization and integration of the millimeter wave radio frequency communication system.

The invention relates to a low-scattering array based on integration of a absorption and transmission integrated metasurface and a Vivaldi antenna, the low-scattering array is composed of N * N units, and each unit comprises a loss layer, an antenna radiator, an air layer between the antenna radiator and the loss layer, and a floor. The loss layer takes a dielectric plate as a substrate, resonators are printed on the upper surface and the lower surface of the dielectric plate, and each resonator is formed by sequentially rotating 90 degrees, 180 degrees and 270 degrees along the anticlockwise or clockwise direction by taking the center of the square dielectric plate as a rotating center and positioning. The antenna radiator takes a dielectric plate as a substrate, a first surface of the dielectric plate is printed with a metal patch of a radiation structure, a second surface of the dielectric plate is printed with a feed network composed of an impedance conversion microstrip line and a fan-shaped microstrip line which are connected in sequence, and the floor is a metal plate with a rectangular gap. According to the metasurface and antenna integrated structure, the bandwidth of the metasurface and antenna integrated structure is greatly widened while out-of-band scattering reduction is achieved, the low-profile characteristic is shown, and the actual application requirement of a broadband antenna system is met.

The present invention belongs to the technical field of transmission array antennas, and specifically relates to a broadband circularly polarized folded transmission array antenna based on an adjustable phase polarization conversion surface. The present invention includes an adjustable phase polarization converter and a circularly polarized twisted reflection surface arranged up and down; the adjustable phase polarization converter includes a plurality of adjustable phase polarization conversion surface units arranged periodically; the adjustable phase polarization conversion surface unit proposed in the present invention has a polarization selection characteristic, which can reflect the incident left-handed circularly polarized electromagnetic wave and twist the incident right-handed circularly polarized electromagnetic wave to transmit it into a left-handed circularly polarized electromagnetic wave, and can be applied to a folded transmission array to reduce the overall cross-section of the array. The broadband circularly polarized folded transmission array antenna based on an adjustable phase polarization conversion surface proposed in the present invention can reduce the cross-section by one third due to its polarization selection characteristic by introducing a polarization converter. The antenna of the present invention has a small number of layers, a simple structure, is easy to process, and has a low cost.

The invention relates to a three-frequency microstrip antenna applied to 5G communication terminal equipment, which belongs to the technical field of antennas and mainly comprises an upper surface radiation unit layer, a lower surface grounding plate layer, an intermediate dielectric substrate layer and a feed structure, the radiation unit layer comprises two internally and externally nested circular patches, symmetrical resonance arms on a circular ring at the outer side of the upper part and an internal and external circular ring connecting patch at the lower part, a circular ring is formed on the two internally and externally nested circular patches of the radiation unit, the circular ring is a circular ring with an opening at the lower end, a rectangular block is connected between the two end parts of the circular ring, and the rectangular block is connected with the circular ring. And all structures of the antenna are conducted. The antenna is simple in structure, the overall area is only 23 mm * 29 mm * 1 mm, the antenna has good radiation characteristics, the stability of a multi-band radiation pattern is kept, the structure is simple, the profile is low, and the antenna has great potential in terminal equipment.

The invention relates to the field of antennas, and particularly discloses a dual-polarized antenna, which comprises a slot antenna layer for radiating a first polarized wave and a microstrip antenna layer for radiating a second polarized wave, wherein the slot antenna layer comprises a waveguide structure, the waveguide structure comprises a plurality of radiation units arranged along a first direction, and each radiation unit comprises a plurality of radiation slots extending along a second direction; the micro-strip antenna layer comprises a plurality of micro-strip oscillator units arranged along a first direction, and each micro-strip oscillator unit comprises a plurality of micro-strip oscillators arranged along a second direction; the microstrip antenna layer is arranged on the slot antenna layer, at least one microstrip array unit is arranged between the radiation units, and projections of the microstrip arrays and the radiation slots on the waveguide structure are not overlapped; the antenna is simple in structure, has the characteristics of low profile, miniaturization and light weight, can obtain the electromagnetic scattering characteristics of a target in different polarization directions, and is suitable for a high-frequency dual-polarized antenna.

A millimeter-wave dual-frequency dual-polarization laminated patch antenna array, the antenna array is formed by a plurality of millimeter-wave dual-frequency dual-polarization laminated patch antenna units of the same structure arranged at equal intervals on the surface of a metal floor. The antenna unit includes a low-frequency annular metal patch, a high-frequency butterfly-shaped metal patch, a metal floor, an upper and lower dielectric substrate, and two feeding structures. The annular metal patch is located on the upper surface of the upper substrate, and is used to generate low-frequency resonance; the butterfly-shaped metal patch is located on the upper surface of the lower substrate, and is used to generate high-frequency resonance; the lower substrate is placed on the metal floor. The two feeding structures penetrate the metal floor and the two layers of dielectric substrates respectively. After installation, the two feeding units are coaxial with the preset through holes in each layer, and do not contact the inner wall of the through hole. The two layers of metal patches provided by the present invention are both fed by capacitive coupling. Capacitive coupling feeding can offset the additional inductance introduced by orthogonal coaxial feeding, and can achieve dual-frequency and dual-polarization operation.

The utility model discloses a frequency reconfigurable liquid crystal phase shift antenna unit suitable for a phased array system. The frequency reconfigurable liquid crystal phase shift antenna unit comprises a first-layer dielectric substrate; the second-layer dielectric substrate and the first-layer dielectric substrate are oppositely arranged in parallel in the vertical direction; the third-layer dielectric substrate and the second-layer dielectric substrate are relatively arranged in parallel in the vertical direction; the first liquid crystal layer is filled between the first dielectric substrate and the second dielectric substrate; the second liquid crystal layer is filled between the second dielectric substrate and the third dielectric substrate; the first supporting structure is vertically arranged between the first dielectric substrate and the second dielectric substrate; the second supporting structure is vertically arranged between the second dielectric substrate and the third dielectric substrate; the first grounding electrode layer is printed on the upper surface of the first dielectric substrate layer; the strip line phase shifter is printed on the lower surface of the second dielectric substrate; the second grounding electrode layer is printed on the upper surface of the second dielectric substrate; and the radiation patch is printed on the lower surface of the third-layer dielectric substrate. According to the utility model, the wide-angle phase shift and frequency reconfigurable characteristics can be realized, and the antenna is suitable for a phased array system.