91 results about "Reflective array antenna" patented technology

The invention discloses a folding mark layout parameter optimization method of a deployable thin film microstrip reflective array antenna, which comprises the following steps: determining an optimization target of the thin film microstrip reflective array antenna, the optimization target comprising an inter-plate distance PD and a folding-unfolding ratio, and giving a value range of folding mark structure characteristic parameters of the reflective array antenna; establishing a thin film microstrip reflective array antenna optimization model according to a Flasher model; solving and screening the optimization model by adopting a dung beetle optimization algorithm to obtain an optimal value of the characteristic parameter; and thus, an optimal crease layout scheme is obtained. According to the invention, a film is taken as a flexible hinge of an antenna dielectric substrate, and a gap needs to be considered when the plates are folded, that is, under the condition of a determined optimization model, the distribution area of each plate is limited to be smaller than that of the original plate, so that the patch antenna is enabled to avoid a crease area.

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 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 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.

An antenna includes a supporting layer and a reflection element disposed on the supporting layer configured to reflect an incident wave with a respective reflection phase, the reflection element extending perpendicularly from the supporting layer at a height configured to achieve the respective reflection phase, and both the supporting layer and the reflection element being formed with an all-dielectric material. The antenna is not susceptible to metallic corrosion and has flexible design freedom. It is in a simple and compact structure for providing complete reflection and phase adjustment simultaneously. The simple structure of the antenna enables it to be manufactured in an efficient and cost-effective manner.

The invention discloses a paper folding reflective array antenna block layout method. The problem that in the prior art, periodic, symmetric and regular distribution characteristics of reflective array units are not matched with non-periodicity, asymmetry and irregularity of paper folding structures is solved. The method comprises the following steps: completing preparation work before layout, and sequentially carrying out independent layout design on each panel in a paper folding reflective array; the independent layout design of the panel comprises the following steps: generating an initial layout, determining a unit type according to the initial layout, deleting an out-board unit, and retaining an in-board unit; for the intersection units, a layout design model is established, the optimization variable is the center position offset of the intersection units, the constraint condition is that the offset intersection units do not intersect with the creases and the adjacent units, and minimization of the sum of squares of the offset of all the intersection units is taken as an optimization target; the method compensates the phase of the electromagnetic wave reaching the edge of the panel while avoiding the crease, and reduces the negative influence of the crease on the electromagnetic performance of the antenna.

The invention discloses an optical transparent reflective array antenna and a preparation method thereof. The optical transparent reflective array antenna comprises a conductive unit array, a dielectric substrate and a conductive grounding plate from top to bottom, the conductive unit array comprises a plurality of reflective array units, each reflective array unit comprises three concentric circular metal thin wires which are respectively a first circle, a second circle and a third circle from outside to inside, and the second circle and the third circle are connected through four centrosymmetric metal thin wires to form a circular ring structure; the length of the metal thin wire is fixed, and the reflection phase is regulated and controlled by adjusting the radius of the first circle and the radius of the second circle. And finally, the antenna array of the array is excited by the feed source horn, so that good performance of high gain, high efficiency and large bandwidth is realized, good visible light transparency is kept, and the technical problems of small phase shift range, large loss, narrow antenna working bandwidth and low efficiency of a traditional optical transparent reflective array antenna unit are solved.

The invention discloses a dual-linear polarization independent control low-profile reflective array antenna with a gain filtering characteristic. The antenna comprises a plane reflection array formed by a plurality of reflection units, and a horn antenna. The reflection unit comprises a magnetoelectric dipole loaded with a split ring resonator, an x polarization feed part and a y polarization feed part, each feed part comprises an independent feed arm and an open-circuit metal microstrip line patch, and the feed arm and the open-circuit metal microstrip line patch are connected through a metalized via hole; energy received by the magnetoelectric dipole in a working band can be coupled to the feed arm, transmitted to the open-circuit metal microstrip line patch from the feed arm through the metalized via hole, and reflected on the open-circuit metal microstrip line patch, so that the reflection phase can be changed by adjusting the length of the open-circuit metal microstrip line patch. A radiation zero point is introduced at a low frequency by utilizing the characteristics of the magnetoelectric dipole, and a radiation zero point is introduced at a high frequency by utilizing the half-wavelength resonance characteristics of the split ring resonator, so that the filtering characteristic is realized.

The invention belongs to the technical field of antennas, and particularly relates to a low-profile single-layer dual-polarization structure composite array antenna for a C / K wave band. Comprising a dielectric substrate, the lower surface of the dielectric substrate is a metal floor, and m * m composite array elements are integrated on the upper surface; each composite array element comprises a square ring structure and a Jerusalem cross structure arranged in the square ring structure, and the Jerusalem cross structure and the square ring structure are not in contact and coincide in center; all the square ring structures form a C-band array antenna, super units are divided according to n * n, and each super unit is fed through an SMA coaxial line; all the Jerusalem cross structures form a k-band reflective array antenna, super units are divided according to z * z, and each super unit is connected with a horn antenna through a waveguide for coupling radiation; wherein: nlt; zlt, zlt; m, z and n are positive numbers. According to the invention, multiplexing of a C / K wave band antenna structure is realized by using the single-layer dielectric substrate, the height is reduced, the process is simplified, the cost is reduced, the antenna is suitable for a multi-frequency satellite communication system, and large-scale array arrangement can provide high-gain radiation.

Provided in the present disclosure are a reflective array antenna and a manufacturing method therefor, and an electronic device. The reflective array antenna comprises a reflective metasurface, wherein the reflective metasurface comprises a plurality of reflective units, each of the reflective units comprises a patch layer, a phase-change material layer, a substrate layer and a metal ground plate layer, and the reflective unit is configured to adjust the phase of an electromagnetic wave of the phase-change material layer by means of changing the state-of-matter of the phase-change material layer when the electromagnetic wave is incident, so as to realize the regulation of a radiation direction of the electromagnetic wave. The present technical solution can solve the problems in the prior art of circuit loss being large, costs being high, the flexibility being poor and industrialization difficulty being relatively large in the design of an adjustable beam antenna in a terahertz band, and the present technical solution involves low manufacturing costs and has an extremely high commercial value and industrial value.

The invention relates to the technical field of wireless communication, and discloses a transmission and reflection array antenna which comprises a feed source, a dielectric substrate, M * N transmission units and m * n reflection units, the transmission unit comprises two transmission layers and two metal through holes, each transmission layer comprises a first metal sheet and second metal sheets on the two sides of the first metal sheet, and the two ends of each metal through hole are connected to the two first metal sheets; the reflection unit comprises a first reflection layer and a second reflection layer, the first reflection layer comprises a third metal sheet and fourth metal sheets on the two sides of the third metal sheet, and the second reflection layer is a fifth metal sheet; the feed source can radiate a first polarized signal and a second polarized signal which are orthogonal to each other to the dielectric substrate side; by adjusting the size of each metal sheet, the transmission unit can generate a preset phase shift value for transmitted electromagnetic waves, and the reflection unit can generate a preset phase shift value for reflected electromagnetic waves, so that the antenna can realize two-way communication, the signal coverage range is expanded, and meanwhile, radiation beams in required shapes are formed.

The invention provides a reflective array antenna and a manufacturing method thereof, and an electronic device, the array reflective antenna comprises a reflective metasurface, the reflective metasurface comprises a plurality of reflective units, each reflective unit comprises a patch layer, a phase change material layer, a substrate layer and a metal floor layer, and the reflective units are used for changing the phase state of the phase change material layer when electromagnetic waves are incident. And the electromagnetic wave phase of the phase-change material layer is adjusted, so that the electromagnetic wave radiation direction is regulated and controlled. According to the technical scheme, the problems of large circuit loss, high cost, poor flexibility and large industrialization difficulty in the design of the terahertz-band adjustable beam antenna in the prior art can be solved, and the terahertz-band adjustable beam antenna is low in manufacturing cost and has extremely high commercial value and industrial value.

The present invention discloses a single-layer broadband reflectarray antenna with independent control of dual-linear polarization. The present invention realizes the x-polarization working state and the y-polarization working state of the reflectarray antenna by rotating the horn antenna 0° and 90° relative to the planar reflectarray; the planar reflectarray includes a plurality of reflective units, each of which includes a dielectric layer, a metal reflective layer and a metal backplane layer; the metal reflective layer includes a metal ring and a cross-shaped metal patch. The present invention realizes independent reflection responses in two directions of the reflective unit through a single degree of freedom, and relies on rotating the feed horn antenna to change the polarization working state of the array antenna. The present invention adopts a single-layer structure without air gaps, achieving low profile, lightweight, simple manufacturing and low cost, and adopts a continuous phase adjustable method. It is the first time to propose a single-layer broadband reflectarray antenna with independent dual-linear polarization and continuous phase adjustment, realizing a lightweight single-layer design while ensuring high aperture efficiency and broadband.

Examples disclosed herein relate to a reflectarray antenna system with two-dimensional beam scanning that includes a first reflectarray having a polarizing grid that operates as a reflective surface in a first polarization and operates as a transparent surface in a second polarization. The reflectarray antenna system includes a second reflectarray comprising an array of reflectarray cells and arranged parallel to the first reflectarray. The second reflectarray includes a first set of feed elements arranged along a first axis and a second set of feed elements arranged along a second axis orthogonal to the first axis to scan a field of view along the first and second axes. The second reflectarray can radiate radio frequency (RE) beams in the first polarization with the first and second sets of feed elements for reflection at the polarizing grid and radiate reflected RE beams in the second polarization for transmission through the polarizing grid.

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.

The present invention relates to the field of wireless communication technologies, and discloses a transmissive and reflective array antenna, which includes a feed source, a dielectric substrate, M×N transmissive units and m×n reflective units thereon; the transmissive unit includes two transmissive layers and two metal vias, the transmissive layer includes a first metal sheet and second metal sheets on both sides thereof, and two ends of the metal via are connected to two first metal sheets; the reflective unit includes a first reflective layer and a second reflective layer, the first reflective layer includes a third metal sheet and fourth metal sheets on both sides thereof, and the second reflective layer is a fifth metal sheet; the feed source can radiate orthogonal first polarization signals and second polarization signals to the side of the dielectric substrate; by adjusting the sizes of the respective metal sheets, the transmissive unit can generate a preset phase shift value for the transmitted electromagnetic wave, and the reflective unit can generate a preset phase shift value for the reflected electromagnetic wave, so that the antenna can achieve two-way communication to expand the signal coverage range and simultaneously form a radiation beam with a desired shape.

The application discloses a shared-aperture metasurface antenna with high isolation, which comprises a horn feed source and a shared-aperture metasurface patch antenna assembly, and the shared-aperture metasurface patch antenna assembly comprises at least one microwave metasurface patch unit, and each microwave metasurface patch unit comprises at least two reflective array units. The shared-aperture metasurface antenna forms the effect of microwave metasurface antenna and millimeter wave reflective array antenna multiplexing on the side close to the horn feed source, the required compensation phase can be obtained by adjusting the size of the reflective array unit, the independent design of the shared-aperture antenna is realized, the high isolation and stable radiation pattern in the microwave and millimeter wave working frequency bands are realized, the antenna has a large frequency ratio of 1:8.57, the ultra-high isolation of more than 100 dB and 40 dB is realized in the low frequency band and the high frequency band respectively, the microwave metasurface and the millimeter wave reflective array effect of the antenna can be integrated on the same layer of the antenna, the antenna structure is compact, and the antenna profile and cost are effectively reduced.

[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 present invention discloses a broadband high-aperture efficiency planar reflection array. The present invention includes a horn feed and a planar reflection array. The horn feed is located directly above the center of the planar reflection array, and the emission center axis of the horn feed is perpendicular to the plane where the planar reflection array is located; the reflection array performs phase compensation on the electromagnetic signal radiated by the horn feed; the phase center of the horn feed coincides with the focus of the planar reflection array antenna. The planar reflection array includes a plurality of reflection units, and the horn feed generates an irradiation wave. Before and after the horn feed irradiates, the phase distribution of the plurality of reflection units on the planar reflection array remains unchanged. When the horn feed irradiates, the planar reflection array can generate a beam with a higher gain in a wide frequency band, achieving a broadband high-aperture efficiency effect. The planar reflection array of the present invention is a single-layer planar structure with a low profile, a wide bandwidth, a high aperture efficiency, and simple manufacture. It has broad application prospects in the fields of long-distance wireless communications such as radars and satellites.

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.

An antenna includes a supporting layer and a reflection element disposed on the supporting layer configured to reflect an incident wave with a respective reflection phase, the reflection element extending perpendicularly from the supporting layer at a height configured to achieve the respective reflection phase, and both the supporting layer and the reflection element being formed with an all-dielectric material. The antenna is not susceptible to metallic corrosion and has flexible design freedom. It is in a simple and compact structure for providing complete reflection and phase adjustment simultaneously. The simple structure of the antenna enables it to be manufactured in an efficient and cost-effective manner.

The invention discloses a method for obtaining phase distribution of a plane reflection array antenna based on a multi-target algorithm. The method comprises the following steps: designing a plane reflection array; establishing a near-field electric field calculation model through the parameters of the plane reflection array, and defining a forming target area and a limiting target area; respectively establishing a first target loss function and a second target loss function according to the forming target and the limiting target; an NSGA-III multi-objective optimization algorithm is adopted to carry out optimization solution, a contradictory relation between a forming objective and a limiting objective in a solution set is analyzed based on a Pareto graph, the range of a limiting area is adjusted, and an optimized second objective loss function is obtained; and solving the optimized second target loss function, selecting a Pareto optimal phase distribution scheme in an optimal solution set, designing a reflective array antenna, and verifying a near-field rectangular focal spot generation effect. According to the method, the target is adjusted through a method of improving the loss function, so that a better shaping effect is obtained.

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.

The invention provides a wide-area wave beam scanning reflective array antenna based on mechanical control. The reflective array antenna is composed of a reflection aperture and a horn antenna feed source. The reflection aperture is formed by arranging reflection units on a plane, and each reflection unit structurally comprises an upper layer dielectric plate, an air gap, a lower layer dielectric plate, a metal ground, an elastic clamping piece and a control rod. The reflection coefficient phase of the reflection unit is regulated and controlled by mechanically controlling the height of the air gap between the upper dielectric plate and the lower dielectric plate, so that beam scanning is realized. The reflection unit has four reconfigurable states, and the position of the upper dielectric plate is fixed, and the position of the lower dielectric plate is controlled by pushing and pulling the control rod, so that the reconfiguration of the reflection unit is realized. By using a 20 * 20 array formed by the reflection units, wide-area beam scanning of + / -60 degrees with the gain greater than 18dBi can be realized, and the gain bandwidth, the directional diagram stability and the like all meet the requirements of super-large-scale MIMO wireless communication.