42 results about "Reflective array antenna" patented technology

The invention discloses a low-profile dual-circularly polarized wave beam scanning folding reflection array antenna. The low-profile dual-circularly polarized wave beam scanning folding reflective array antenna comprises a lower reflective array antenna and an upper circularly polarized selection metasurface. A circular polarization plane feed source is integrated in the middle of the reflective array antenna, and beam deflection is achieved. The circular polarization selection metasurface introduces opposite phase gradients to a left-hand circular polarization wave beam and a right-hand circular polarization wave beam through spin decoupling, and then introduces opposite wave beam deflection angles. Meanwhile, due to the polarization selection function of the circular polarization selection metasurface, the profile height of the antenna is half of the focal length of a traditional reflective array. By rotating the lower-layer reflective array antenna and the upper-layer circular polarization selection metasurface, the antenna can realize simultaneous + / -42-degree pitch angle scanning and 360-degree azimuth angle scanning of left-hand circular polarization and right-hand circular polarization dual beams, and the aperture efficiency, the axial ratio, the scanning loss and other performances are good. The low-profile dual-circularly-polarized wave beam scanning folding reflection array antenna provided by the invention can realize simultaneous scanning of two circularly-polarized wave beams, and is low in profile, compact in structure, low in cost and novel in function.

The invention relates to the technical field of antennas, and discloses a reconfigurable transflective array antenna applied to non-line-of-sight microwave propagation, which comprises a control circuit, and a first polarization grid layer, a first dielectric layer, M * N resonant sheets, a second dielectric layer and a second polarization grid layer which are sequentially arranged, the resonance piece comprises a radiation part, a grounding wire, four extension parts and two PIN diodes, the four extension parts are symmetrically arranged on the periphery of the radiation part and are connected with the radiation part, and the two PIN diodes are respectively arranged on two adjacent extension parts and are respectively connected with the upper polarization grid layer and the lower polarization grid layer through bending wires on the extension parts and metal columns in the dielectric layer; one end of the grounding wire is connected with the radiation part, and the other end is connected with direct-current ground; and the control circuit controls the connection and disconnection of the PIN diode through the polarization gate layer to realize a transmission mode or a reflection mode. The reconfigurable transflective array antenna applied to non-line-of-sight microwave propagation is relatively simple in structure, and loss can be reduced.

The invention discloses a reflective array antenna control method and system based on a broadband dual-polarization unit, and the method comprises the steps: obtaining a target wave beam pointing instruction, and carrying out the orthogonal decomposition of the target wave beam pointing instruction into a first polarization control vector and a second polarization control vector; calculating a theoretical phase frequency spectrum of each unit according to the polarization control vector; calling a preset database to extract a basic phase spectrum; quantitative mapping is carried out by calculating a matching error between a theory and a basic phase frequency spectrum, a phase control code containing the first polarization and the second polarization is obtained and loaded to a corresponding broadband dual-polarization unit to drive the switching of a physical state of the broadband dual-polarization unit, and real-time reconstruction of a wave beam is realized. Compared with the prior art, the antenna can overcome the defects that a traditional reflective array antenna is serious in polarization component coupling, low in phase matching degree in a broadband range and inaccurate in phase control code acquisition, and remarkably enhances the independent pointing precision and the full-band gain stability of dual-polarization beams. Therefore, flexible reconstruction of the wave beam in polarization and frequency dimensions is realized.

The invention discloses a broadband and high-efficiency true time delay reflective array antenna, and belongs to the technical field of antenna engineering. Through the design of the broadband horn feed antenna, the broadband butterfly-shaped dipole antenna and the real-time-delay coaxial transmission line, high-efficiency directional radiation is realized. The gain bandwidth of the multi-layer patch type reflective array antenna is much larger than that of a traditional multi-layer patch type reflective array antenna; compared with a traditional transmission line phase modulation type reflective array antenna, due to stable time delay and shielding and no resonant structure, the antenna has better gain stability, and an in-band gain curve is increased approximately linearly. Finally, the antenna is simple in structure and can be realized only by a single-layer patch structure and a common coaxial transmission cable, and high-cost laminated patch processing is not needed.

The invention belongs to the technical field of antenna design, and discloses a broadband reflective array antenna unit, which comprises a metal layer, a dielectric layer and a metal back plate which are sequentially stacked, the metal layer comprises eight arc-shaped metal wires of which the centers are communicated, every two of the eight arc-shaped metal wires form a group, two groups are arranged along a first direction, the other two groups are arranged along a second direction, the two directions are orthogonal, and the two groups of arc-shaped metal wires in each direction are rotationally symmetrical about the communication center; any two metal wires which are rotationally symmetrical about the communication center have equal central angles; and in the eight arc-shaped metal wires, any two adjacent arc-shaped metal wires are staggered by a certain distance along the radius direction and extend in opposite rotating directions. The staggered structure not only avoids overlapping of the metal wires and improves the reflection phase range, but also forms a double-resonance mode, so that broadband linear phase response can be provided, and the designed reflective array antenna unit is simple in structure and easy to process, and can also realize linear-circular polarization conversion.

[Problem] The present invention addresses the problem of providing a lightweight and flexible electromagnetic wave reflecting sheet that has folding parts that are highly resistant to deterioration even when repeatedly folded and unfolded, that can be stowed compactly, and that is suitable for use in a deployable reflectarray antenna to be mounted on an artificial satellite. [Solution] In this electromagnetic wave reflecting sheet, a first layer consisting of a fiber base material having a metal pattern formed directly on at least one surface thereof and a second layer consisting of a fiber base material having a metal film formed directly over at least one entire surface thereof are arranged such that the first layer and the second layer face one another, and, furthermore, a reflecting element row is formed from elements comprising the metal pattern in the first layer, and the second layer is used as a ground layer, thereby forming a reflectarray for a deployable antenna.

This invention discloses a dual-band common-aperture conformal transflective array antenna with a high frequency division ratio, belonging to the field of emergency communication. It comprises, from top to bottom, a common-aperture, coplanar integrated dielectric substrate, three shared frequency selective surfaces, and a reflection-transmission coordinated control layer. Each of the three shared frequency selective surfaces includes a central cascaded frequency selective surface and surrounding extended frequency selective surfaces. The reflection-transmission coordinated control layer includes a double-opening ring located at the bottom of the central cascaded frequency selective surface, with its diameter limited by the period of the central cascaded frequency selective surface, and surrounding extended frequency selective control surfaces. Using this dual-band common-aperture conformal transflective array antenna with a high frequency division ratio, independent amplitude and phase control of the two frequency bands at 35GHz and 140GHz, with a 4:1 frequency division ratio, is achieved without mutual interference.

The invention relates to the technical field of wireless communication, and discloses a transmission and reflection unit of an antenna and a transmission and reflection array antenna, the unit comprises a reflection patch, a first substrate, a first gate layer, a second substrate, a transmission patch, a third substrate and a second gate layer which are arranged in sequence; the reflection patch comprises a first I-shaped patch and C-shaped patches which are symmetrically arranged on two sides of the middle part of the first I-shaped patch; the first gate layer and the second gate layer are a plurality of metal strips which are orthogonally arranged; the transmission patch comprises a second I-shaped patch, a square patch and two rectangular patches, the two ends of the second I-shaped patch are arc-shaped, the included angle between the length direction of the second I-shaped patch and the length direction of the first grid layer is 45 degrees, the square patch is arranged in the middle of the second I-shaped patch, and the two rectangular patches are symmetrically arranged on the two sides of the square patch. The reflection phase shift value and the transmission phase shift value of the unit can be adjusted by adjusting the size parameters of the reflection patch and the transmission patch, and the array antenna composed of the unit has the characteristics of wide bandwidth, high gain and multiple modes.

The invention relates to the technical field of antennas, in particular to a design method of a reflective array antenna for realizing multi-beam circular polarization and the reflective array antenna, and the design method comprises the following steps: step 1, extracting irradiation electric field distribution of a feed source antenna (3) on an aperture of the reflective array antenna; 2, based on irradiation electric field distribution and reflection phase distribution of the reflective array antenna, low-sidelobe elliptical beam synthesis is carried out by adopting an adaptive iterative Fourier algorithm, in the iteration process, a beam area of each beam is automatically identified according to an obtained directional diagram, and the beam areas and sidelobe areas are respectively corrected according to constraint conditions; step 3, according to a phase synthesis result, a circular polarization reflection unit (1) corresponding to the synthesized reflection phase distribution is arranged on the reflection array antenna aperture; and step 4, arranging a wave absorbing unit (2) surrounding the circularly polarized reflection unit (1) in the edge area of the aperture of the reflective array antenna.

The application discloses a low-profile full-metal circularly polarized reflective array. The reflective array antenna comprises a circularly polarized horn antenna for feeding, a full-metal circularly polarized reflective array, and a support for fixing the circularly polarized horn antenna and the full-metal circularly polarized reflective array. The circularly polarized reflective array is composed of units with different reflection phases, and the units are adjusted by rotation to form a required radiation beam. The antenna has a full-metal structure, and has certain advantages over a reflective array realized by using a dielectric substrate in application scenarios such as high power and conformal. The antenna has the characteristics of simple structure, low profile, low cost and short design period, and is suitable for satellite communication and radar fields.

The application relates to the technical field of wireless communication, and discloses a transmission-reflection unit of an antenna and a transmission-reflection array antenna, the unit comprising a reflection patch, a first substrate, a first grid layer, a second substrate, a transmission patch, a third substrate and a second grid layer arranged in sequence; the reflection patch comprises a first W-shaped patch and C-shaped patches symmetrically arranged on both sides of the middle part of the first W-shaped patch; the first grid layer and the second grid layer are a plurality of metal strips arranged in an orthogonal mode; the transmission patch comprises a second W-shaped patch, a square patch and two rectangular patches, the two ends of the second W-shaped patch are arc-shaped patches, the length direction of the second W-shaped patch and the length direction of the first grid layer form an included angle of 45 degrees, the square patch is arranged in the middle of the second W-shaped patch, and the two rectangular patches are symmetrically arranged on both sides of the square patch. The size parameters of the reflection patch and the transmission patch can be adjusted to adjust the reflection phase shift value and the transmission phase shift value of the unit, and the array antenna composed of the unit has the characteristics of wide bandwidth, high gain and multiple modes.

The invention discloses a reconfigurable unit of a paper folding reflective array antenna and an array bias circuit wiring method thereof. The reconfigurable unit sequentially comprises a metal ground, a foam air layer, a polyimide film layer and a metal patch layer from bottom to top, wherein the metal patch layer comprises a first metal patch layer and a second metal patch layer which are distributed at an interval, and a PIN diode is arranged between the first metal patch layer and the second metal patch layer; the first metal patch layer and the second metal patch layer are respectively provided with direct current bias via holes. The reflective array antenna unit based on the polyimide film has the advantages of being simple in structure, low in cost, light in weight, high in folding-unfolding ratio and high in performance, can be well suitable for a satellite-borne paper folding reflective array antenna, and meanwhile brings good wave beam regulation and control performance to the satellite-borne paper folding reflective array antenna.

This invention relates to the field of antenna technology and discloses a method for correcting assembly errors in planar reflective array antennas. It aims to address the problems of existing assembly processes failing to maintain subwavelength-level accuracy, traditional compensation methods being unable to dynamically detect non-uniform deformation and local misalignment, and lacking the ability to jointly model multi-dimensional coupling errors. The method includes: constructing a digital twin model containing the theoretical positions and phase configurations of the reflective elements; acquiring spatial coordinates and radiation field data under the actual assembly state through 3D scanning and near-field measurement; establishing the mapping relationship between element position deviation, angle deflection, beam pointing error, and gain loss; identifying key error patterns and distribution regions using principal component analysis and spatial clustering; calculating the required phase correction for each element and generating a compensation distribution map. This application enables accurate perception, adaptive compensation, and online correction of assembly errors, significantly improving antenna gain, sidelobe suppression capability, and beam pointing accuracy.

The application discloses a reconfigurable transreflective unit, a reconfigurable transreflective array antenna and a vehicle, and relates to the technical field of antennas. The second dielectric substrate in the unit is oppositely arranged with the first dielectric substrate along the X direction. The side, away from the first dielectric substrate, of the second dielectric substrate is provided with a transmissive patch. The side, away from the second dielectric substrate, of the first dielectric substrate is provided with a reflective patch electrically connected with the transmissive patch. Two diodes are arranged on the reflective patch. By controlling the conduction and the cut-off of the two diodes, the reconfigurable transreflective unit can be switched between the reflection mode and the transmission mode. In the reflection mode, the reflective patch is used for reflecting the incident X-polarized electromagnetic wave to the space where the feed source is located. In the transmission mode, the transmissive patch is used for converting the incident X-polarized electromagnetic wave into Y-polarized electromagnetic wave and transmitting the Y-polarized electromagnetic wave to the space opposite to the feed source. The application can solve the problem of high isolation and large-angle low-loss scanning under the severe vehicle environment.

The invention discloses a high-power circularly polarized reflective array antenna applied to hard rock crushing, and belongs to the technical field of microwave antennas. The antenna comprises a circular polarization horn feed source and a plane reflection array composed of a plurality of basic units capable of independently rotating. The basic unit adopts a structure that a quincunx metal patch, a supporting metal wall and a metal base are integrally wrapped by an insulating injection molding medium, and continuous regulation and control of a reflection phase are realized through the rotating unit. The device has extremely high power capacity, can realize high-precision energy focusing in a near-field region, and effectively improves the coupling efficiency of microwave energy to rock mass through a circular polarization working mode. The antenna is firm in structure, flexible in regulation and control and suitable for microwave-assisted rock breaking and other industrial scenes.

The invention provides a high-selectivity gain filtering type folding reflective array antenna and a working method thereof. The high-selectivity gain filtering type folding reflective array antenna comprises an auxiliary reflecting surface and a main reflecting surface, the auxiliary reflecting surface comprises a first dielectric substrate and a first metal layer located on the surface of the first dielectric substrate; the main reflecting surface comprises second to fourth dielectric substrate layers which are stacked in sequence, and second to fifth metal layers which are arranged among the dielectric substrates; the main reflecting surface forms a feed source unit at the central position and a plurality of basic units arranged at the periphery of the feed source unit in an array manner through the second to fifth metal layers; the auxiliary reflecting surface and the main reflecting surface are parallel to each other, and the surface of the first dielectric substrate, far away from the first metal layer, of the auxiliary reflecting surface is opposite to the surface of the second metal layer of the main reflecting surface; an air gap exists between the auxiliary reflecting surface and the main reflecting surface; according to the invention, high gain and direction stability are ensured, and performance characteristics of passband gain flatness, out-of-band gain rapid attenuation, high frequency selectivity and the like are realized at the same time.

The application discloses a high-efficiency light-transparent reflective array antenna and a preparation method thereof. The reflective array antenna comprises a light-transparent conductive unit array, a light-transparent dielectric substrate and a light-transparent frequency selective surface ground. The light-transparent conductive unit array comprises a combined structure of an external folded square ring and an internal square ring made of metal fine wires, forms a multi-resonant structure, ensures high parallelism of a phase shift curve and consistency of reflection loss at different frequencies, and reduces the influence on the reflection loss under the condition of oblique incidence. The light-transparent frequency selective surface ground comprises a nine-grid square ring structure made of metal fine wires, realizes full reflection of a band-stop type, obtains higher light transmittance performance, and effectively realizes reduction of a radar scattering cross section outside a working frequency band. The application realizes electromagnetic performance comparable to that of a traditional microwave device, and has effects of a wide frequency band, low reflection loss, high gain, high aperture efficiency, high light transmittance and the like.

The invention discloses an air-layer-free optical transparent transmission and reflection integrated reflection array antenna with independent bidirectional beam control and a preparation method thereof. The antenna comprises a top conductive polarization grid, a first dielectric substrate, a conductive unit array, a second dielectric substrate and a bottom conductive polarization grid which are sequentially arranged from top to bottom, the conductive unit array comprises a plurality of transmission and reflection integrated array units, and each transmission and reflection integrated array unit is a reflection array unit or a transmission array unit and is determined according to an arrangement mode; the conductor structure of each reflective array unit adopts two concentric square metal thin wire rings which are respectively a first square ring and a second square ring from inside to outside, and the inner square ring, namely the interior of the first square ring, is connected with a cross-shaped crossed metal thin wire; the conductor structure of each transmission unit adopts a double-square-shaped netted right-angle arrow structure formed by a plurality of metal thin wires; and the conductor structures of the top conductive polarization grid and the bottom conductive polarization grid are a plurality of rectangular metal thin wires which are arranged at equal intervals and are in an orthogonal relationship.

The application discloses an optically transparent reflective array antenna and a preparation method thereof. The optically transparent reflective array antenna comprises, from top to bottom, a conductive unit array, a dielectric substrate and a conductive ground plate. The conductive unit array comprises a plurality of reflective array units. Each reflective array unit comprises three concentric circular metal thin wires, namely a first circle, a second circle and a third circle from outside to inside. The second circle and the third circle are connected by four center-symmetrical metal thin wires to form a circular ring structure. The length of the metal thin wire is fixed, and the radius of the first circle and the second circle is adjusted to realize the adjustment of the reflection phase. The finally assembled antenna array is excited by a feed horn to realize good performance of high gain, high efficiency and large bandwidth, while good visible light transparency is maintained. The technical problems of small phase shift range, large loss, narrow antenna operating bandwidth and low efficiency of the traditional optically transparent reflective array antenna unit are solved.

The application discloses a transparent dual-frequency reflective array antenna and a phase compensation method thereof, and belongs to the technical field of wireless communication.The antenna comprises a transparent medium, dual-frequency reflective array antenna units arranged on the transparent medium in an array, and a floor made of a transparent metal wire screen resistance film and laid on the bottom surface of the transparent medium.The dual-frequency reflective array antenna units are arranged in an interlaced manner by low-frequency and high-frequency reflective array antenna units, the low-frequency units are located in the center, adopt a first cross-dipole structure formed by fine metal wires, and can be extended into a Jerusalem cross structure; the high-frequency units are distributed around the low-frequency units, are composed of an outer ring, an inner ring and a second cross-dipole, and the phase is adjusted by changing the size of the inner ring and the second cross-dipole; and low-frequency and high-frequency feed sources are arranged above the array surface.The application realizes the transparentization of the dual-frequency reflective array, widens the phase compensation range by using a two-degree-of-freedom design, has the communication performance, optical transparency and multi-frequency band compatibility, and meets the multi-frequency band and transparent communication requirements of a smart city.

The application discloses a thin film microstrip reflective array unit, which is sequentially and closely arranged and comprises a metal patch layer, a polyimide film layer, an air layer and a metal ground plate supporting layer; the application designs the microstrip reflective array antenna unit by taking the thin film as a medium, and has the advantages of simple structure, easy folding, light weight and the like, and can meet the folding and unfolding requirements of a large-aperture spaceborne antenna; considering that the thin film reflective array antenna is formed, there is a folding mark in the folding process, the application further discloses a microstrip reflective array layout method for avoiding the folding mark, analyzes layout conditions under square, triangular and circular grids, then calculates the number of units intersected with the folding mark under different layouts according to the folding mark position, and the folding mark is avoided by rotating or removing the units, and by adjusting the antenna units, the application first proposes a thin film microstrip reflective array unit layout scheme for avoiding the influence of the folding mark.

The invention provides an ultra-wide-band dual-polarization reflective array antenna and an arbitrary linear polarization synthesis method thereof, and belongs to the field of microwave antennae, the ultra-wide-band dual-polarization reflective array antenna comprises a plurality of reflective units arranged in an array, and each reflective unit comprises a first dielectric layer, a second dielectric layer, a third dielectric layer and a fourth dielectric layer which are sequentially stacked; the coupling metal layer is arranged on one side, deviating from the second dielectric layer, of the first dielectric layer; the coupling metal layer comprises a plurality of first coupling patches arranged in an array; the metal patch layer is arranged on one side, deviating from the third dielectric layer, of the second dielectric layer; the metal patch layer comprises a first long-strip patch and a second long-strip patch, and a second coupling patch is arranged at the intersection of extension lines of the first long-strip patch and the second long-strip patch; the isolation layer is clamped between the second dielectric layer and the third dielectric layer; the metal ground layer is clamped between the third dielectric layer and the fourth dielectric layer; the direct-current feed layer is arranged on one side, deviating from the third dielectric layer, of the fourth dielectric layer; the beam phase can be decoupled from the polarization phase.

This invention belongs to the field of antenna engineering technology, specifically providing a 1-bit encoded wide-bandwidth angle-scanning reflective array antenna to achieve high-speed, low-cost beam scanning with wide-bandwidth angle-scanning characteristics. This invention employs a wide-bandwidth horn feed and dipole antenna elements. The element structure uses a phase delay line with short-circuited terminations to control the phase, which not only provides wide-bandwidth characteristics but also minimizes inter-element coupling and mutual influence, suppressing resonance. Furthermore, the DC control structure is simple, significantly reducing the number of electronic control components and lowering the complexity of the electronic control method. In summary, this invention utilizes a stripline transmission line to achieve wide-bandwidth, low-loss linear phase shift and employs 1-bit encoding for high-speed, low-cost array phase electrical modulation to achieve wide-bandwidth angle-scanning, offering advantages such as simple structure and convenient electronic control.

The application provides a large-frequency-ratio three-frequency antenna for Wi-Fi / WiGig application, which comprises a first dielectric plate and a second dielectric plate; one side of the first dielectric plate is defined as a front side, and the other side is a back side; the front side of the first dielectric plate is provided with a reflective array surface and a rectangular patch; the back side is provided with a grid patch and a dipole array arranged in a blank area of the grid patch; the grid patch and the dipole array are multiplexed as a floor in the reflective array antenna; one side of the second dielectric plate and opposite to the back side of the first dielectric plate is a metal floor, and the metal floor is provided with a first through hole and a second through hole for feeding the grid patch antenna and the dipole array antenna respectively; the other side of the second dielectric plate is provided with a differential feeding network, a power divider and a band-pass filter; the grid patch antenna, the dipole array and the reflective array antenna in the application have a multiplexing relationship in structure, three-frequency operation can be realized without increasing additional space, and the integration of the antenna structure is improved.

A 1-bit reconfigurable low-power reflection array antenna applied to B5G communication, characterized in that it comprises a reflection array and a feed source, the reflection array comprises a plurality of periodically arranged reflection units, the reflection unit comprises a patch, an upper ground plate and a lower ground plate arranged from top to bottom; the upper ground plate is etched with a short-circuit groove, a pad is arranged in the short-circuit groove, a PIN diode is arranged between one side of the pad and one side of the short-circuit groove, and a capacitor is arranged between the other side of the pad and the other side of the short-circuit groove; the pad is connected with a direct current bias line, by controlling the conduction and disconnection of the PIN diode, two compensation phase states of 0° and 180° are obtained, and the 1-bit reconfigurable performance is realized. The antenna structure is simple, the current flowing through the active device is reduced to reduce the system power consumption, at the same time, the antenna realizes high aperture efficiency and relatively accurate beam scanning angle.

The invention discloses a reconfigurable transmission and reflection unit, a reconfigurable transmission and reflection array antenna and a vehicle, and relates to the technical field of antennae, a second dielectric substrate in the unit is arranged opposite to a first dielectric substrate in the X direction, and a transmission patch is arranged on the side, away from the first dielectric substrate, of the second dielectric substrate; a reflection patch electrically connected with the transmission patch is arranged on one side, deviating from the second dielectric substrate, of the first dielectric substrate, and two diodes are arranged on the reflection patch; the reconfigurable transflective unit can be switched between a reflection mode and a transmission mode by controlling the conduction and cut-off of the two diodes; in the reflection mode, the reflection patch is used for reflecting incident X-polarized electromagnetic waves to the space where the feed source is located; in the transmission mode, the transmission patch is used for converting incident X-polarized electromagnetic waves into Y-polarized electromagnetic waves and transmitting the Y-polarized electromagnetic waves to a space opposite to the feed source; according to the invention, the problems of dual-mode high isolation and large-angle low-loss scanning in a vehicle-mounted harsh environment can be solved.

The invention discloses a transparent folding reflective array antenna and a beam transmission method. The transparent folding reflective array antenna comprises a polarization selection layer and a polarization conversion phase modulation layer which are sequentially arranged from top to bottom, wherein the polarization selection layer is used for reflecting a linear polarization wave and transmitting a cross polarization wave vertical to the polarization direction of the polarization selection layer; the polarization conversion phase modulation layer is used for converting a linear polarization wave into a cross polarization wave vertical to the polarization direction of the polarization conversion phase modulation layer and performing phase regulation and control at the same time; and the feed source is arranged at the center of the polarization conversion phase modulation layer. The wave beam transmission method comprises the following steps: after the feed source emits a y polarized wave, the y polarized wave is reflected by the polarization selection layer to the polarization conversion phase modulation layer and is converted into an x polarized wave at the polarization conversion phase modulation layer, phase regulation is carried out to enable the wave beam to point to a designed direction, and then the wave beam is transmitted through the polarization selection layer. According to the method, the requirements of communication, radar detection and the like can be met while the naked eye observability is ensured.

The utility model discloses a folded reflective array antenna using a novel planar feed source, which comprises a polarization torsion reflective array, a polarization grid, a plurality of nylon columns and the novel planar feed source used for transmitting linearly polarized waves, and the novel planar feed source is coplanar with the polarization torsion reflective array. The polarized torsional reflection array comprises a plurality of polarized torsional reflection units arranged in a square array, each unit comprises a metal layer, a first dielectric substrate and a first metal floor which are sequentially arranged from top to bottom, the metal layer is etched on the upper surface of the first dielectric substrate and is of a double-crack square ring stacked structure, and the first metal floor is of a double-crack square ring stacked structure. The double-crack square ring superposition type metal patch comprises a first crack square ring metal patch and a second crack square ring metal patch, openings of the first crack square ring metal patch and the second crack square ring metal patch are oppositely superposed to form a square closed structure in the center, and meanwhile, right-angle W-shaped structures symmetrically extend out of opposite angles of the square closed structure. Compared with the existing pyramid horn feed folding reflective array antenna, the folding reflective array antenna has the advantages that the compactness of the antenna is greatly improved, the profile of the antenna is reduced, and the folding reflective array antenna has the characteristics of wide band and high aperture efficiency and shows good application prospect.

The invention discloses a broadband circularly polarized millimeter wave reflective array antenna adopting a single-layer single patch unit, and mainly solves the problems that the existing broadband reflective array antenna is complex in structure, high in cost and high in millimeter wave frequency band processing precision requirement. The invention relates to a three-dimensional (3D) printed antenna, which comprises a circularly polarized horn feed source, a planar microstrip reflective array, a 3D printed resin support and an acrylic support. The planar microstrip reflective array is composed of N circularly polarized reflective array antenna units, each circularly polarized reflective array antenna unit comprises a circular metal radiation patch, a single-layer dielectric substrate and a metal reflection ground, wherein a fan-shaped cross gap is etched in the center of the circular metal radiation patch, and the circularly polarized reflective array antenna unit is used for regulating and controlling a circularly polarized reflective phase. The circularly polarized reflective array antenna unit provided by the invention realizes multi-resonance broadband reflection by using a single-layer single-patch structure, and compared with a broadband reflective array antenna applying a multi-layer stacking unit and a single-layer multi-patch unit, the circularly polarized reflective array antenna unit provided by the invention is simpler in structure, lower in processing cost, fewer in error source and more suitable for large-scale popularization and application. The low-cost and high-performance targets of the reflective array antenna are achieved in the millimeter wave frequency band, and the antenna can be applied to 5G / 6G millimeter wave wireless communication.