149 results about "Spherical wave" patented technology

The invention relates to a spherical wave oscillation-slow nuclear high-order decoupling method and device for physical property inversion, and belongs to the field of geophysical detection and acoustic detection. The method comprises the following steps: obtaining and inputting observation data, and initializing seabed elastic parameters; determining an integral interval according to the observation data, decomposing the integral interval into a plurality of sub-intervals, and setting a decoupling order; calculating an oscillation nuclear local integral matrix of each order corresponding to the observation data incident angle; calculating the angle deviation guiding quantity of each order of the slowly-varying kernel; calculating a reflection coefficient vector of each order of spherical wave; calculating a spherical wave reflection coefficient of high-order decoupling; and solving a subsequent inversion problem by using the obtained high-order decoupled spherical wave reflection coefficient. According to the method, the calculation efficiency of the seabed spherical wave reflection coefficient in the inversion process is effectively improved; the decoupling order is improved, the calculation precision is improved, or the number of the subintervals can be reduced by improving the decoupling order under the condition that the calculation precision is certain.

The invention relates to a seabed elastic parameter inversion method, system and device under an earthquake spherical reflection wave oscillation-gradual change nuclear decoupling framework, and belongs to the field of geophysical detection and acoustic detection. The method comprises the following steps: (1) inputting observation data and initializing seabed elastic parameters; (2) determining an integral interval and decomposing the integral interval into a plurality of sub-intervals; (3) calculating an oscillation nuclear local integral matrix corresponding to the incident angle of the observation data; (4) calculating a slowly-varying kernel local mean vector; (5) calculating a spherical wave reflection coefficient of oscillation-gradual change kernel decoupling; and (6) constructing a target function by using the decoupled spherical wave reflection coefficient, and solving the target function. In the objective function solving process, only the steps (4) and (5) need to be repeatedly executed after the seabed elastic parameters are updated, the oscillation nuclear local integral matrix in the step (3) does not need to be repeatedly calculated, redundant calculation about oscillation nuclear integration is avoided, and the calculation efficiency is improved.

The invention provides a near-field electromagnetic source positioning method based on array signal processing, and relates to the technical field of electromagnetic signal detection and positioning, and the method comprises the steps: constructing an array receiving signal model based on the wave-front characteristics of an electromagnetic wave spherical surface, and employing a steering vector for the construction; a sensor array is used for collecting near-field radiation source signals, and amplitude calibration processing is carried out on the near-field radiation source signals to form an array data set. According to the near-field electromagnetic source positioning method based on array signal processing, high-precision three-dimensional positioning of a near-field electromagnetic source is realized by combining amplitude calibration, characteristic decomposition and joint optimization processing through an array receiving signal model based on electromagnetic wave spherical wavefront characteristics. According to the near-field electromagnetic source positioning method based on array signal processing, a multi-dimensional optimization strategy is introduced in the signal subspace extraction and parameter estimation process, the estimation precision of the distance, the pitch angle and the azimuth angle is improved, and the positioning stability and robustness in a complex electromagnetic environment are improved.

The invention relates to the technical field of sensor sensing, and discloses a microspur sensing method and system for an MEMS ultrasonic sensor array, and the method comprises the steps: carrying out the phase calibration of the MEMS ultrasonic sensor array, and obtaining a phase calibration parameter; performing near-field spherical wave phase compensation on the phase calibration parameter based on the macro target distance and the incident angle to obtain a near-field compensation parameter; controlling the MEMS ultrasonic sensor array to execute beam forming of wide beam scanning and narrow beam focusing according to the near-field compensation parameter to obtain a macro focusing sound field; transmitting ultrasonic waves to a rear vehicle target through the micro-distance focusing sound field and receiving a reflection signal, and performing vehicle feature recognition on the reflection signal to obtain a vehicle recognition result; and positioning calculation of the target angle and distance is carried out based on the vehicle identification result to obtain rear vehicle positioning data, and the angle resolution and the distance measurement precision in a microspur range are improved.

A flying-over beam pattern scanning hologram microscope device includes: a scan beam generation unit which converts of a first beam and a second beam to a first spherical wave; a scanning unit, which includes a spatial modulation scanner for controlling the scan beam in the horizontal direction, and a translation stage for moving an object in the vertical direction at the rear end of the projection unit; the projection unit projecting the scan beam onto an object plane; and a light collection unit which detects a beam that has passed through the objective lens again after being reflected or fluoresced from the object.

A seismic energy estimation method based on generalized spherical wave propagation, relating to the field of earthquake engineering. The method comprises: determining initial seismic total energy and seismic power on the basis of seismic source characteristics and a seismic magnitude; determining a generalized spherical wave equation, and calculating an average energy flow density of propagated waves on the basis of the wave equation of spherical waves; using an earth surface spherical crown, which is projected on the zone of a seismic source surface, as a main impact zone of seismic spherical waves on an earth surface, the main impact zone being equivalent to a square and performing grid division, and calculating the hypocentral distance between the center of each grid and the center of a seismic source so as to form a hypocentral distance matrix; and expressing the generalized spherical wave energy flow density of each grid as the sum of the energy flow density of longitudinal waves and the energy flow density of transverse waves, performing grid subdivision, estimating the average amplitude of each subdivided grid mass unit within a seismic action period, and evaluating the seismic action energy of a site. The present invention estimates the action of seismic energy on the earth surface by defining the generalized spherical wave propagation of seismic source energy, thereby more accurately evaluating the distribution condition of seismic energy on the earth surface.

The invention belongs to the field of optical measurement and detection, and particularly relates to a coherence tomography wavefront measurement device and method based on optical fiber interconnection and point diffraction, the measurement device separates a fundamental mode and a high-order mode of test light through a few-mode optical fiber, the fundamental mode generates a reference spherical wave through point diffraction to serve as reference light, and the high-order mode serves as the test light; after the test light and the reference light are subjected to optical fiber coupling interference, an interference pattern is obtained by a detector, and wavefront error measurement and optimization are realized through wavefront calculation and correction. The method has high precision and high stability, and can realize rapid closed-loop feedback correction.

This invention provides a near-field millimeter-wave codebook generation method and related components. The near-field millimeter-wave codebook generation method is applied to a near-field hierarchical communication beamcodebook system. The method includes: obtaining the level number of the codebook at the current level in the near-field hierarchical communication beamcodebook system; determining the codebook level of the current level according to the relationship between the level number and a preset level, wherein the codebook level includes an upper-level codebook and a lower-level codebook; and obtaining a near-field millimeter-wave communication codebook based on the codebook level of the current level. The near-field millimeter-wave codebook generation method provided by this invention considers the characteristics of the spherical wavefront in the near-field region, avoids performance degradation, and achieves coverage of the entire Fresnel region. It designs a lower-level codebook covering polar coordinates and an upper-level codebook designed to reduce beam search overhead.

The application discloses a near-field strong interference suppression method based on spherical wave deconvolution beam forming positioning, which comprises the following steps: performing fine grid division on a near-field scanning area of a linear array; performing spherical wave focusing beam forming on the near-field scanning area and two-dimensional deconvolution beam forming about distance-angle under the condition of unknown sound source position; calculating the distribution entropy characteristics of the deconvolution beam forming result in the angle dimension, and using a preset threshold to correlate the interference positioning of a target; constructing an array flow pattern matrix A of each near-field target l and generating a covariance matrix A; calculating the orthogonal complement space projection matrix of the covariance matrix A, and applying the orthogonal complement space projection matrix to the array element domain covariance matrix C to perform near-field interference suppression; using a far-field plane wave model to perform deconvolution beam forming calculation on the covariance matrix for suppressing near-field interference, so as to obtain passive detection results of the near-field strong interference suppression. The application can realize near-field interference positioning and interference suppression under the condition that the interference position is unknown.

The invention provides a curved surface polarization torsion reflecting surface and an antenna using the same, and belongs to the technical field of antennas. The curved surface polarization torsion reflection surface comprises a curved surface dielectric plate, and a metal bottom plate and an electromagnetic metasurface which are respectively arranged on the outer side and the inner side of the curved surface dielectric plate; the electromagnetic metasurface is formed by periodically arranging a plurality of single-layer electromagnetic metasurface units. The single-layer metasurface unit with the polarization torsion function is conformal on the curved surface, so that the technical problems that a traditional multi-layer planar polarization torsion structure is complex to process, curved surface conformal is difficult, and the performance is deteriorated after conformal are solved. The reflecting surface is preferably a paraboloid, so that the incident wave polarization torsion is realized, and the spherical wave can be converted into the plane wave to improve the antenna gain. The metasurface unit keeps good cross polarization reflection performance within the wide incidence angle range of 0-40 degrees, is suitable for curved surface conformal design, can be integrally formed through 3D printing, and is easy and convenient to machine and stable in performance.

The present application belongs to the field of rail transit wireless communication technology, and discloses a subway Wi-Fi 7 signal coverage system and method based on kneading antenna, the system comprises: a medium waveguide arranged along a subway tunnel, a kneading antenna movably attached to the medium waveguide, a Wi-Fi 7 access point connected to the medium waveguide, and a control unit. The method comprises: obtaining the position of a user terminal and establishing a channel based on a near-field spherical wave model; the control unit executes a joint optimization algorithm to calculate the optimal kneading antenna position and digital beamforming matrix; the kneading antenna is controlled to move to the optimal position, and the access point transmits signals using the optimal beamforming matrix. The present application moves the kneading antenna to a position close to the user, combines the low-loss transmission characteristics of the medium waveguide, shortens the wireless propagation distance of high-frequency signals, and realizes precise coverage of mobile users through perception-driven dynamic position reconstruction and joint beamforming, thereby improving the quality of train-ground communication.

This application discloses a method, apparatus, device, and medium for self-calibration of an ultrasonic sensor for transformers. The method involves obtaining the spatial distance by using the time difference and measured sound velocity of the same partial discharge pulse received by a built-in UHF antenna and an external ultrasonic sensor; constructing a cross-medium model based on the acoustic parameters of the insulating oil and the tank to calculate the sound pressure transmission coefficient at the liquid-solid interface; constructing a spherical wave dissipation equation in viscous oil by combining discharge and fluid parameters, and calculating the theoretical sound pressure of the outer shell using the distance and transmission coefficient; comparing the measured peak output voltage of the external sensor with the in-situ acoustic-electric conversion sensitivity for online self-calibration. This method reconstructs a high-fidelity sound wave propagation attenuation model, which can improve calibration accuracy and diagnostic reliability.

The invention discloses an infrared super lens with a moth eye imitating anti-reflection nano structure. The moth-eye anti-reflection metasurface, the metasurface lens and the substrate are all made of silicon materials, and the moth-eye anti-reflection metasurface and the metasurface lens are micro-nano-scale arrays and are located on the two sides of the same substrate respectively. According to the invention, the metasurface is fully utilized to finely and efficiently modulate the phase, amplitude and other characteristics of light waves, the moth-eye metasurface changes the effective refractive index of the surface and reduces the reflectivity of incident light on the silicon surface, the metasurface lens enables the phase distribution to meet the spherical wavefront contour, efficient focusing of emergent beams is realized, and the light quality is improved. All micro-nano structures have the advantage of good thermal stability based on the same substrate material, and anti-reflection and focusing effects are achieved in an extremely thin scale.

The application discloses a low-profile wave beam regulation millimeter wave antenna loaded with Huygens super surface, which comprises a non-biased substrate integrated waveguide slot array antenna and a near-field Huygens super surface; the non-biased substrate integrated waveguide slot array antenna is composed of a first dielectric substrate, metal structures printed on the top and bottom of the first dielectric substrate, a slot array etched on the metal structures and metal through holes in the first dielectric substrate; the near-field Huygens super surface comprises a second dielectric substrate and metal structures on the top and bottom of the second dielectric substrate; the non-biased substrate integrated waveguide slot array antenna serves as an excitation source to provide a spherical wave, and the near-field Huygens super surface is used for precisely regulating the phase distribution above the slot array antenna. The application has the characteristics of low profile and can realize two-dimensional wave beam regulation based on different super surface distributions.

The application discloses a crimped cylindrical wave tight field device, which mainly comprises a crimped parabolic cylindrical reflector, a feed source, a quiet zone and a virtual line source. The parabolic cylindrical reflector can correct the cylindrical wave formed by the spherical wave emitted by the feed source in the quiet zone. In order to control the diffraction of the edge of the reflector, the edge of the parabolic cylindrical reflector needs to be processed. The crimped edge of the parabolic cylindrical reflector can reduce the low-frequency limit of the cylindrical wave tight field. Compared with the sawtooth cylindrical wave tight field, the electric size of the reflector working at the low-frequency limit is smaller, and the engineering realization of the large cylindrical wave tight field is more favorable.

The invention provides an ISAC near-field channel robust beam forming optimization method and device based on MMSE estimation. The method comprises the following steps: carrying out system modeling and signal configuration on an ISAC system; accurately modeling a near field communication channel by adopting a spherical wave model, calculating to obtain an SINR (Signal to Interference plus Noise Ratio) of a user, and introducing an outage probability constraint; establishing a sensing model under a far-field condition, and estimating a target response matrix by adopting an MMSE criterion to obtain a sensing MSE; introducing an enhanced waveform to improve the perception DoF, and updating the SINR; an enhanced covariance matrix is introduced, the minimum perception MSE is used as an optimization target, the outage probability constraint, the total power constraint and the positive semi-definite constraint updated according to the updated SINR are used as constraint conditions, and an ISAC near-field channel robust beam forming optimization problem is constructed; a non-convex problem is converted into a convex form through combination of semi-definite relaxation SDR and an optimization framework of a spherical boundary and S-lema, and a beam forming optimization matrix is solved and obtained by obeying the constraint of a linear matrix inequality LMI. According to the invention, beam forming can be optimized.

The invention discloses a holographic MIMO near-field channel estimation method based on a spatial correlation matrix, and the method comprises the steps: carrying out the modeling of a 3D H-MIMO channel based on a non-uniform spherical wave model, and building an H-MIMO near-field channel model; calculating a spatial correlation coefficient between antenna units at a base station end, introducing a generalized single-ball scatterer model, and deducing to obtain a near-field spatial correlation matrix; eigenvalue decomposition is carried out, and a low-dimensional signal subspace is constructed; designing a pilot frequency matrix, wherein the pilot frequency time slot number in the pilot frequency matrix is set as the rank of the low-dimensional signal subspace; and estimating the low-dimensional signal subspace coefficient to obtain a channel estimator of the low-dimensional signal subspace. According to the channel estimation method, spatial correlation prior information is effectively utilized, and the pilot frequency overhead and the calculation complexity are remarkably reduced.

The application relates to the field of wireless communication, in particular to a near-field spherical wave ultra-large-scale MIMO uplink signal detection method. In a near-field spherical wave model system, the uplink signal detection specifically comprises the following steps: dividing a receiving antenna array into C non-intersecting subarrays, taking each array as a factor node and the sending signal of each user as a variable node to construct a factor graph model; according to the factor graph model, the approximate posterior distribution of the sending signal of a user on a subarray is calculated; based on a sorting interference cancellation algorithm, the receiving signal and the channel matrix of each subarray are iteratively updated to complete signal detection. In a multi-user near-field scene, the application can obtain better performance, and in the face of a scene where multiple users arrive at the same angle but have different distances to the array center, the application can still maintain relatively optimal detection performance.

The present application belongs to the field of photoelectric precision manufacturing technology, and discloses an intelligent method for detecting and adjusting basic light waves. The whole system structure contains a detection or control unit. The relative positions of various components are obtained by the initial position and the moving distance of the components. The component position is moved by a servo motor. The light intensity or interference fringe information is received by a CCD to judge the light wave condition, and the light wave collimation state is automatically detected. The required diverging spherical wave, converging spherical wave or plane wave is obtained by adjusting the internal optical device position through a computer, and no human intervention is required. The wave surface curvature radius can be reproduced and adjusted to provide the required spherical wave or plane wave. These are all conducive to providing accurate illumination light sources for various optical systems. The analysis of the CCD interference fringes in the system, combined with the detection and control of the positions of various components, is completely analyzed and calculated by a computer program before being controlled, so as to realize the adjustment without human intervention, thereby realizing the intelligence of the instrument.

Disclosed in the present application are an imaging method, an imaging apparatus (300), a head-mounted display (100), and a storage medium. The method comprises: by means of a mask, modulating the phases of spherical waves emitted by point light sources, so as to change propagation parameters of the spherical waves, the propagation parameters comprising at least one of the phases and the amplitudes, the parameters of the spherical waves at different depths modulated by the mask being different from each other, and a photographed scene containing a plurality of point light sources; on the basis of the spherical waves of which the propagation parameters have been changed, generating a grayscale image; and, on the basis of a preset high-dimensional reconstruction model, high-dimensionally reconstructing the grayscale image, so as to generate a high-dimensional image containing depth information.

The invention discloses an aspheric self-adaptive annular sub-aperture splicing measurement method and system, and belongs to the technical field of optical precision measurement. The method comprises the following steps: acquiring an aspheric surface profile parameter and setting an axial displacement delta; constructing a matching criterion function, and ensuring that the interference fringe density accords with the Nyquist sampling limit of the detector; automatically solving a sub-aperture tangency point position and a reference spherical wave parameter based on an inversion model; adaptively dividing the annular sub-aperture and satisfying a 25% overlapping ratio threshold value; performing interference measurement on each sub-aperture and acquiring phase data; and correcting system errors through a global least square splicing model, and reconstructing a full-aperture surface shape. According to the invention, automation and high precision of aspheric surface detection are realized, manual presetting of tangency points is avoided, the measurement efficiency and the splicing quality are significantly improved, and the method is suitable for high-precision measurement of high-gradient and large-aperture aspheric surface elements.

The invention discloses a millimeter wave dual-circular polarization multi-beam antenna based on a polarization grating lens. The millimeter wave dual-circular polarization multi-beam antenna comprises a dielectric polarization grating lens and a millimeter wave + / -45-degree dual-linear polarization antenna array. According to the multi-beam antenna, a + / -45-degree dual-line polarization planar antenna array is used as a feed source and is placed on a horizontal focal plane of a dielectric polarization grating lens, and dual-circular polarization beam scanning is realized by exciting different ports of the feed source array. Each perforated column in each layer of the dielectric polarization grating lens has dielectric constants in radial gradient distribution and anisotropy in horizontal and vertical directions, and can convert + / -45-degree dual-linear polarization into dual-circular polarization while converting spherical waves into plane waves to improve antenna gain. The planar lens and the polarization grid structure are integrated, the system size is effectively reduced, + / -50-degree dual circular polarization beam scanning is achieved, the axial ratio bandwidth reaches 21.8% (24.5-30.5 GHz), and the maximum gain reaches 19.2 dBic.

The invention relates to the technical field of wireless communication, in particular to a multi-user full-duplex communication method based on a multi-layer intelligent omnidirectional metasurface, which realizes self-interference suppression of a reflection side and user signal enhancement of a transmission side by utilizing decoupling regulation and control of a multi-layer structure on the reflection side and the transmission side. Aiming at the problem of large difference of multi-user communication quality, an optimization target is expanded from traditional user rate sum maximization to system utility maximization, a utility function is introduced to improve weak user weight, and communication fairness is improved. According to the method, firstly, system utility maximization is equivalently converted into weighted mean square error minimization, then a penalty term is adopted to be merged into self-interference power constraint, and finally, base station digital beam forming and multi-layer intelligent omnidirectional metasurface simulation beam forming are alternately optimized. And finally, under the condition that the self-interference of the base station is fully suppressed, the degree of freedom of system data transmission is doubled or more by introducing near-field spherical wave transmission characteristics.

This invention relates to the field of wireless communication technology, and provides a shaped antenna reflector and a reflector antenna, having a shaped reflector surface, including a parabolic reflector surface that is at least a portion of a semi-parabolic rotator and a swept reflector surface that is at least a portion of a swept surface; the generatrix of the semi-parabolic rotator is a parabolic segment whose vertex is on the parabola, and the semi-parabolic rotator is formed by rotating the generatrix by 180° about the axis of symmetry of the parabola; the edge of the parabolic reflector has a connecting edge that is located on the same parabola as the generatrix, and the swept surface is formed by sweeping the connecting edge in a direction away from the parabolic reflector surface, and the swept reflector surface is tangent to the parabolic reflector surface at the connecting edge; the shaped reflector surface is used to reflect spherical waves emitted from the feed on the concave side of the parabolic reflector surface, the reflected beam is a deformed cosecant square beam in a first plane direction and a narrow beam in a second plane direction, the first plane direction is consistent with the direction of the central symmetry plane of the semi-parabolic rotator, and the first plane direction and the second plane direction are perpendicular.

The invention relates to the technical field of optical precision detection, in particular to a method and a device for calibrating core parameters of a Shack-Hartmann wavefront sensor, which can obtain the distance between a micro-lens array and a camera target surface and the size of a micro-lens unit which are highly related to detection precision through superposition calibration based on plane waves and spherical waves. The theoretical model has high precision. In the calibration scheme, simple and rapid switching based on plane waves and spherical waves can be realized by removing / adding the microscope objective, and few error sources are introduced. In the calibration scheme, high-precision rotation angle monitoring based on an autocollimator and high-precision displacement monitoring based on a displacement sensor are arranged, so that high-precision calibration is ensured.

This invention discloses a lens focal length measurement method based on vortex light interferometry, comprising the following steps: constructing a measurement system for vortex light and spherical wave interference; acquiring the interferogram I1(x,y) of the vortex light and spherical wave interference, the interferogram I2(x,y) for center positioning, the parallel light spot pattern I3(x,y), and the converging light spot pattern I4(x,y); obtaining the center coordinates (x0,y0) of the effective image of the interferogram I2(x,y), and cropping the effective image region I from the interferogram I1(x,y) based on the center coordinates. R (x,y); Get I R The maximum light intensity point distribution map I5(x,y) is obtained by transforming I5(x,y) to the polar coordinate system, resulting in the maximum light intensity point distribution map I6(θ,r) in the polar coordinate system. Periodic reconstruction of I6(θ,r) yields the maximum light intensity point distribution map I... m (θ,r), and for I m The points in (θ,r) are fitted to obtain the fitting result a; the acquired parallel light spot image I3(x,y) and converging light spot image I4(x,y) are binarized to obtain the binarized images I'3 and I'4, and the ratio β of their spot sizes is calculated; the focal length f = βa of the lens under test is calculated from the fitting result a and the ratio β of the spot sizes. The measurement optical path structure of this invention is simple, the measurement error is small, and the measurement accuracy is high.

This invention discloses a tilted wavefront sub-aperture stitching interferometric detection method based on a spatial light modulator, relating to the field of optical detection. Light emitted from a laser is collimated and expanded before being incident on a polarizing beam splitter; the reflected light serves as a reference beam, and the transmitted light as a test beam; the test beam is incident on a spatial light modulator, and after phase modulation by the spatial light modulator and passing through a lens, it forms standard spherical waves with different tilt angles, allowing for zero-position detection of sub-apertures divided into different regions. Using a spatial light modulator as an ideal point source array generator in conjunction with an imaging lens can generate the required ideal tilted spherical waves for different test parameters, offering strong versatility compared to traditional point source generators. Furthermore, for large-aperture complex curved surfaces, sub-aperture stitching can be achieved without moving the interferometric device, reducing errors introduced by mechanical movement.

The invention relates to the field of diffractive optical element preparation, in particular to a diffractive optical element and a preparation method thereof.The preparation method comprises the steps that a thin glass substrate is provided, and a through hole is formed in the thin glass substrate in a laser processing mode; coating photoresist on the surface of one side, where the through hole is formed, of the thin glass substrate and the inner wall of the through hole, leveling the photoresist, and then curing the photoresist; depositing a metal film on the surface of the other side of the thin glass substrate by adopting a magnetron sputtering mode; coating photoresist on the surface of the metal film, leveling, patterning the photoresist by adopting an electron beam exposure mode, and forming a window for exposing the metal film after developing; performing dry etching on the exposed metal film through the window to form a pinhole penetrating through the metal film; and removing the photoresist remained on the temporary supporting structure and the surface of the metal film to obtain the diffractive optical element. According to the invention, aberration introduced by the thickness of the thin glass substrate can be thoroughly eliminated, nearly ideal spherical waves can be generated, and a foundation is laid for ultrahigh-precision optical detection and imaging application.

This invention provides a double-layer symmetrical cross-shaped metasurface element and a high-gain wide-beam metasurface reflective antenna. The antenna includes a conical horn feed and a reflective array, the reflective array being composed of multiple reflective metasurface elements. The metasurface elements employ a symmetrical double-layer cross-shaped metal patch structure with an air gap between the two patches. Continuous modulation of the reflected phase of the incident electromagnetic wave is achieved through electromagnetic coupling between the multi-layer structure. The reflective array is designed with phase compensation based on the spatial phase distribution of the feed antenna, converting the reflected wave from a spherical wave to a quasi-plane wave, thereby achieving directional radiation and extending the beam coverage. This invention features a compact structure, low loss, and can achieve synergistic optimization of high directional radiation and a wide beam under limited aperture conditions, making it suitable for applications such as emergency communications.

The utility model relates to the technical field of folded antennas, in particular to a metasurface folded antenna with broadband wave beam scanning capability, which comprises a reconfigurable metasurface, a polarization conversion metasurface and a linear polarization feed source antenna, and is characterized in that the reconfigurable metasurface comprises a first dielectric plate, a second dielectric plate, a first metal grating, a second metal grating and a first metasurface; the polarization conversion metasurface comprises a third dielectric plate and two second metasurfaces, the linear polarization feed source antenna comprises a fourth dielectric plate, a fifth dielectric plate, a third metasurface, a fourth metasurface and a metal bottom plate, and the metasurfaces convert spherical waves emitted by an antenna feed source into plane waves through phase compensation. According to the array antenna, a plane wave is converted into a scannable low-SLL pencil-shaped light beam, the contour of the array antenna is reduced by 2 / 3, a simulation experiment test shows that + / -50-degree beam scanning can be realized on an E surface and an H surface within the broadband range of 8.1-11.3 GHz, the peak gain is 17.8 dBi, the aperture efficiency is 14%, and the 3dB gain bandwidth is greater than 30%.