79 results about "Electromagnetic metasurface" patented technology

The invention relates to the technical field of electromagnetic metasurfaces and bionic computing, and discloses a bionic information processing method and system based on an electromagnetic metasurface. The method comprises the following steps: S1, mapping DNA sequence information into a multi-dimensional coding state of the bionic metasurface information processing unit in an electromagnetic adjustable parameter space; s2, realizing co-evolution of the multi-dimensional coding state in space, frequency, phase and amplitude dimensions by dynamically regulating and controlling electromagnetic response parameters of the bionic metasurface information processing unit; and S3, using propagation and interference of electromagnetic waves in the diffraction neural network and a near-field coupling effect between the bionic metasurface information processing units to complete copying, logical operation and information read-write operation of the DNA sequence information. The functions of DNA coding, copying, logic calculation, information reading and writing and the like are uniformly mapped into the programmable electromagnetic metasurface platform, and cooperative processing of information in the aspects of space, electromagnetism and algorithm is achieved.

The invention relates to the vehicle diagnosis technology, and discloses a vehicle chassis diagnosis method, device and system and a storage medium, and the method comprises the steps: obtaining vehicle working condition data and fault code data through a diagnosis connector; wherein the vehicle working condition data comprises the engine rotating speed; based on the rotating speed of the engine, the electromagnetic metasurface sensor is controlled to be switched to the corresponding electromagnetic scanning frequency band so as to conduct electromagnetic scanning on the vehicle chassis; receiving electromagnetic scanning data sent by the electromagnetic metasurface sensor, and positioning an abnormal area based on the electromagnetic scanning data; matching the electromagnetic characteristics of the abnormal region with a preset defect information template to determine defect information; and determining fault information of the vehicle chassis based on the vehicle working condition data, the fault code data and the defect information. According to the invention, non-contact high-precision detection of chassis structure abnormity can be realized.

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 invention discloses a transparent transmission type metasurface array antenna which comprises a feed source oscillator and a transparent metasurface structure. The feed source oscillator is arranged below the transparent metasurface structure and is used for transmitting or receiving electromagnetic waves; the transparent metasurface structure comprises six layers of artificial electromagnetic metasurfaces stacked in parallel, each artificial electromagnetic metasurface comprises a transparent medium substrate and a metasurface array arranged on the upper surface of the transparent medium substrate, and the metasurface array comprises a plurality of conductive pattern units arranged periodically and is used for regulating and controlling the phase of transmission electromagnetic waves. According to the embodiment of the invention, phase regulation and control alignment can be carried out on electromagnetic waves without shielding light, and the method has efficient regulation and control capability on the wavefront of the electromagnetic waves, so that the indoor wireless signal intensity is enhanced, the cost and power consumption of large-scale antenna configuration are reduced, and the economical efficiency and practicability of an antenna system are improved.

Disclosed in the present application are a Huygens-metasurface-based transparent transmission unit and a manufacturing method therefor, and a Huygens-metasurface-based transparent transmission array. The unit comprises intermediate dielectric layers, a first metal layer, and a second metal layer. The array comprises a plurality of Huygens-metasurface-based transparent transmission units that are arranged in a rectangular layout. The method comprises: on the basis of the generalized Snell's Law, determining the phase distribution of a Huygens metasurface unit, and adjusting parameters of a double-arc structure, so as to obtain double-arc structure parameters; on the basis of the structure parameters, manufacturing metal layers and performing etching to make the metal layers form on surfaces of PET layers; and positioning a target on each PET layer, and by means of an optically clear adhesive, bonding onto glass the PET layers with the metal layers, so as to manufacture a transparent transmission unit. The embodiments of the present application can achieve high transmittance of electromagnetic waves and achieve easy deployment on existing windows, and extend the wireless-signal reception range in specific areas. The Huygens-metasurface-based transparent transmission unit and the manufacturing method therefor, and the Huygens-metasurface-based transparent transmission array, as provided in the present application, can be widely applied in the technical field of electromagnetic metasurfaces.

The application discloses a kind of phase electromagnetic metasurface design methods based on two-phase method, mainly solve the problem of electromagnetic metasurface structure complexity when existing technology electromagnetic metasurface is simultaneously regulated in amplitude phase.It is implementation scheme: initialization electromagnetic metasurface parameter;Electromagnetic metasurface unit required by two-phase method is calculated phase matrix;Design the electromagnetic metasurface unit including metal grating layer, two layers of dielectric layer and metal patch, and draw the phase table of the electromagnetic metasurface unit;According to the required phase of each unit of electromagnetic metasurface and the phase table of electromagnetic metasurface unit, the state of each unit of electromagnetic metasurface is adjusted to obtain adjusted electromagnetic metasurface;Feed horn is placed above adjusted electromagnetic metasurface, and radio frequency signal is added to feed horn, to generate required beam, complete phase electromagnetic metasurface design.The application can reduce the complexity of electromagnetic metasurface structure, improve the beam design capability of electromagnetic metasurface, and can be used for wireless transmission, communication system.

The application discloses a kind of reflection type mechanical drive intelligent electromagnetic super surface.The intelligent surface combines electromagnetic super surface and mechanical drive structure, breaks the limitation that traditional passive super surface is not reconfigurable and cannot be real-time regulated, compared with active super surface, no loss is introduced, with higher reflection efficiency.Based on the above advantages, the intelligent surface can realize beamforming and coverage enhancement of two orthogonal linearly polarized electromagnetic waves when electromagnetic wave is incident in free space.The intelligent surface responds to electromagnetic wave of specified frequency band through optimized square patch structure, and its dynamic adjustable property is realized by real-time control of three step motors driven adjustable metal backboard bidirectional movement through computer and control board output pulse signal.This polarization multiplexing reflection type mechanical drive intelligent surface has the characteristics of high efficiency, easy to process, real-time dynamic continuous adjustment, etc., and has application prospect in widening channel capacity and improving communication efficiency.

The application relates to an active electromagnetic metasurface for realizing programmable topology polariton waveguide, which is composed of basic functional units combined with varactor diodes and periodically extended in a two-dimensional plane; the basic functional unit comprises two layers of dielectric, four layers of metal and a metallized via; by changing the applied bias voltage, reconfigurable topology transmission of magnetic polariton dispersion topology from ellipse to straight line and hyperbola can be realized; by means of wavefront characteristics under different dispersion topologies, adjustable field channeling and reconfigurable flat panel focusing functions and programmable topology polariton waveguide design can be realized. The application supports flexible propagation and guiding manipulation of surface waves, has the advantages of low dimension, real-time response, continuous controllability and high stability, provides an effective platform for active optoelectronic integrated circuit research, is beneficial to the design of planar integrated high-speed communication components, high-resolution imaging and high-sensitivity sensing and positioning systems, and has wide application prospects in the fields of near-field information processing and energy collection.

The application provides a device and method of fusing radar radio frequency induction and heterogeneous interface coupling technology, through an electromagnetic super surface pattern array antenna with metal characteristics on the inner surface of the heterogeneous interface, a fixed module is bonded around the electromagnetic super surface pattern array antenna, the fixed module and the electromagnetic super surface pattern array antenna jointly form a closed electromagnetic wave resonance cavity region, a high polymer medium material for radiating and conducting electromagnetic waves is built-in, and a radar radio frequency induction control system; electromagnetic waves emitted by a radar microstrip antenna are repeatedly reflected, superimposed and enhanced in the electromagnetic wave resonance cavity region through the high polymer medium material, and then radiated to an external space induction area of the heterogeneous interface through the electromagnetic super surface pattern array antenna, so that activities or micro-motion targets in the induction area range are detected, and a double threshold control logic output control instruction is adopted to improve the induction and control precision of the radar induction system.

The invention belongs to the technical field of microwave antennas, and particularly provides a tight coupling phased-array antenna based on a broadband efficient electromagnetic structure. The antenna comprises a broadband matching structure (I) which is an electromagnetic metasurface structure loaded on a broadband efficient electromagnetic structure; the radiation structure (II) is a broadband efficient electromagnetic structure; the feed structure (III) comprises a coaxial line, a gradient microstrip feeder line and a double-Y balun; and a floor (III). According to the invention, the broadband efficient electromagnetic structure is applied to the tightly-coupled antenna, which is equivalent to introduction of three currents in one unit aperture, so that the defect electromagnetic environment that only one current exists in one aperture when a traditional dipole antenna is cut off as an array element is made up, an infinite continuous current sheet model can be better simulated, and the antenna performance is improved. And therefore, a larger bandwidth and a lower profile can be realized. And meanwhile, the wide-angle scanning capability of the array is further improved by introducing the metasurface wide-angle matching.

The invention discloses a radiation and reflection integrated electromagnetic metasurface unit and an array thereof. The metasurface unit comprises a first dielectric substrate, a second dielectric substrate and a base structure formed by a PP layer located between the first dielectric substrate and the second dielectric substrate. A first metal layer is arranged on the upper surface of the first dielectric substrate, a metal floor layer is arranged between the first dielectric substrate and the PP layer, a second metal layer is arranged between the PP layer and the second dielectric substrate, and a third metal layer is arranged on the lower surface of the second dielectric substrate; by controlling the level of the direct-current bias line, the on-off state of the third PIN diode is further controlled to change the impedance matching state of the microstrip line and the gap, switching of the radiation reflection mode of the unit is achieved, and 2-bit reflection phase control is achieved in the reflection mode. The array comprises radiation and reflection integrated electromagnetic metasurface units which are arranged in an array mode, and each electromagnetic metasurface unit in the array can perform radiation and reflection mode switching by controlling the level of a corresponding direct current bias line so as to realize flexible regulation and control of electromagnetic waves; and the electromagnetic wave control capability can be well realized at 3.5 GHz, and the reflection efficiency is high.

The application relates to the field of electromagnetic super technology, in particular to a metasurface structure design method based on a joint discriminant generative adversarial network, a periodic arrangement of a metasurface unit structure and related parameters is designed, and is input into electromagnetic simulation software to obtain electromagnetic response, a forward prediction data set and a reverse design data set are constructed; the forward prediction data set and the reverse design data set are respectively divided into a training set and a test set; a forward prediction network model is constructed, the forward prediction data set is sent into a simulator network Simulator used for forward prediction to perform training, and the forward prediction network model parameters are fixed after the training is completed. The application adds a pre-trained forward prediction network and a discriminator network for discriminating spectral similarity into a reverse design network, so that the network can well understand the relationship between structure design and overall optical response, more attention is paid to the absorption spectrum of the generated structure, new design can be generated, and the application can be extended to analyze other metasurface structures.

Systems, components, and methods for promoting the penetration of radiowaves between the exterior and the interior of a building are provided. An electromagnetic metasurface is mounted with respect to a surface of a building and a radiofrequency waveguide is mounted within the building. The electromagnetic metasurface is configured to focus incident radiowaves onto an entry to the radiofrequency waveguide and the radiofrequency waveguide comprises at least one radiating opening for causing radiowaves that have been guided along the radiofrequency waveguide to radiate into an interior of the building.

This invention discloses a reconfigurable electromagnetic metasurface unit integrating transmission, reflection, and absorption functions. The metasurface unit includes two identical polarized resonant patches connected by a central metal via. Four positive intrinsic negative PIN diodes are integrated into the tunable patch layer, and the state of the four PIN diodes is dynamically controlled by a DC bias voltage. This invention can flexibly switch the operating mode of the metasurface by a DC bias voltage, and control the electromagnetic wavefront in real time in absorption mode (low RCS), transmission mode, and reflection mode. Through array coding, it can realize functions such as high-gain beamforming, beam scanning, beam focusing, RCS reduction, beamforming, and vortex beam generation. It has the advantages of simple design, low cost, and excellent performance, and has great potential in fields such as smart skin, electronic countermeasures, and wireless communication systems.

We utilize high-quality-factor (high-Q) metasurfaces patterned either in or adjacent to electro-optical or thermo-optical materials such as lithium niobate, barium titanate, or thermally-sensitive polymers. The metasurface includes nanoantennas that act as dipole emitters; the particular structure and arrangement of nanoantennas can steer light to particular directions or focus light, The electromagnetic metasurface supports one or more guided mode resonances. The metasurface also includes a perturbation superposed on the metasurface features and configured to couple free-space radiation to the guided mode resonances.

The energy distribution regulation method of the quasi-Bessel beam based on the vortex feed source comprises the following steps: step 1, setting the beam parameters of the quasi-Bessel beam generated by the electromagnetic super surface, for calculating the array scale of the electromagnetic super surface and designing the vortex feed source; step 2, designing the parameters of the vortex feed source, obtaining the vortex feed source; step 3, calculating the array scale of the electromagnetic super surface, for the design of the electromagnetic super surface; step 4, according to the phase compensation design of the set beam parameters of the quasi-Bessel beam and the parameters of the vortex feed source, constructing the super surface; step 5, exciting the vortex feed source with radio frequency, realizing the feed of the vortex wave to the electromagnetic super surface, and generating the quasi-Bessel beam with controllable energy distribution. The application controls the electric field intensity distribution of the vortex wave generated by the vortex feed source, and uses the electromagnetic super surface to compensate the phase of the generated vortex electromagnetic wave, so that the energy distribution regulation of the quasi-Bessel beam is realized.

The application discloses a low-scattering large-angle wave-transparent electromagnetic metasurface based on angle multiplexing, which comprises an angle selection layer and a phase control layer; the phase control layer is used for controlling the reflection phase of an angle incident electromagnetic wave in a first range; the angle selection layer is used for selectively transmitting an angle incident electromagnetic wave in a second range and selectively reflecting an angle incident electromagnetic wave in the first range, and comprises a second dielectric substrate and metal grounds on the upper and lower surfaces of the second dielectric substrate, the upper metal ground is etched with first and second slot structures, and the lower metal ground is etched with third and fourth slot structures; the two layers of slot structures are arranged in a staggered mode in a unit arrangement direction of a plane, and the first, second, third and fourth slot structures extend to the edges of the unit structures along another unit arrangement direction of the plane and are in communication with the slot structures of adjacent units. The application realizes the integration of scattering suppression and large-angle wave-transparent functions, and effectively improves the function multiplexing capability and system integration degree of the electromagnetic metasurface device.

The application discloses a kind of multi-channel controllable nonlinear electromagnetic super-structure construction methods for B5G communication, for breaking symmetry to realize the case of directly exciting continuous domain bound state, determine the physical parameters including symmetry breaking degree, incident polarization state and material conductivity that affect nonlinear response;Based on the above physical parameters, on high resistance silicon substrate, set up symmetrical metal structure with broken section, obtain nonlinear electromagnetic super-structure that can produce several passbands;Based on the above nonlinear electromagnetic super-structure, using temperature-sensitive material to complete the broken section of metal structure, obtain adjustable nonlinear electromagnetic super-structure that can realize material conductivity change and affect symmetry breaking degree by temperature regulation, realize nonlinear response regulation based on super-structure continuous domain bound state.

This invention discloses an intelligent protection method and system for low-voltage switchgear in power plants based on multi-dimensional safety monitoring, relating to the field of electrical equipment condition monitoring. The method includes: real-time acquisition of multi-physics field data inside the low-voltage switchgear using an electromagnetic metasurface array; extraction of spatiotemporal features characterizing the switchgear's operating state; inputting these spatiotemporal features into a pre-constructed digital twin model of the field for state determination and abnormal pattern identification, and generating a corresponding field reconstruction strategy. This field reconstruction strategy defines the target electromagnetic parameters and spatial interaction modes of the electromagnetic metasurface array; and, according to the field reconstruction strategy, sending control commands to the electromagnetic metasurface array to reconstruct the local electromagnetic field environment of the corresponding area inside the low-voltage switchgear. This application solves the technical problems of insufficient monitoring accuracy and passive, lagging protection methods in existing low-voltage switchgear protection systems for power plants, achieving improved monitoring accuracy and enabling proactive intervention and precise protection against fault precursors.

The application relates to the technical field of electromagnetic super surface, in particular to a broadband linear polarization conversion super surface, which is formed by periodically arranging polarization units in the same plane, and is provided with a multilayer structure of three metal layers and two dielectric layers in the polarization unit structure; the metal and the dielectric are reasonably designed; polarization conversion is realized through the rhombus-shaped metal patch located in the middle layer; the square patch located on the top side is relied on to expand the bandwidth and improve the polarization conversion rate; the efficient polarization conversion of electromagnetic waves in a wide frequency band is realized; the broadband linear polarization conversion super surface has the characteristics of super wide band and high polarization conversion rate; further, compared with the prior art, the structure of the broadband linear polarization conversion super surface is smaller, easy to integrate, and has the advantages of easy processing.

This invention relates to the field of artificial electromagnetic materials, and more particularly to a metasurface unit and a reconfigurable electromagnetic metasurface. The metasurface unit includes a metal reflective layer, a dielectric layer, flexible actuators, a metal response layer, and a drive control unit. Multiple flexible actuators are fixed in a two-dimensional array on the side of the dielectric layer away from the metal reflective layer. The flexible actuators have both spreading and contracting forms; two adjacent flexible actuators are interconnected when in the spreading form. The drive control unit is electrically connected to each flexible actuator and controls each flexible actuator to switch between spreading and contracting forms. This invention, by incorporating flexible actuators within the metasurface unit and controlling each actuator to switch between spreading and contracting forms, allows the metasurface unit to independently realize multiple structural forms. Therefore, the metasurface unit possesses higher degrees of freedom, a wider reconfigurable bandwidth, and more flexible and controllable electromagnetic wave manipulation capabilities.

The invention discloses a pure metal double-frequency double-rotation-direction-line circular polarization converter and a design method thereof, and belongs to the technical field of antennas and electromagnetic metasurfaces. The atomic unit array is of a reflective structure and is composed of a plurality of atomic unit periodic arrays, and adjacent atomic units are tightly connected. The atomic unit comprises an upper-layer metal structure and a lower-layer metal structure which are separated by air. The upper-layer metal structure is a square pixel metal plate structure and is formed by performing material reduction slotting on a square slotting structure and a strip-shaped slotting structure on a pure metal plate; the lower layer metal structure is a pure metal plate structure. External incident electromagnetic waves are incident to the upper-layer metal structure along the normal direction, and are reflected and returned at the lower-layer metal structure to form target circularly polarized waves after combined action with air. According to the converter, under the condition of not depending on dielectric substrate printing, reflection circular polarization output of incident ray polarization waves in two different frequency bands is achieved through a manufacturable pure metal laminated structure, the output rotation directions of the two frequency bands are opposite, and the structure realizability and the design reproducibility are improved.

The application discloses a kind of based on task target's generative electromagnetic super surface structure design method and system, it is related to electromagnetic super surface technical field, establishes task target, deduces the characteristic frequency response amplitude and phase characteristic that super surface needs to have for different functions of super surface.The KAE network of condition variation generative network model KAE network improved by this task-oriented design Kolmogorov-Arnold network is used as structure generation network.Improved deep neural network model is used as forward prediction network to predict frequency response amplitude and phase characteristic.The distance difference between quantitative calculation and target frequency response amplitude, target phase is retrieved to the super surface structure closest to task characteristic.Improves the precision of encoder and decoder network, alleviates the edge oscillation problem caused by fourier low frequency subspace.Solves the problem that one-to-many mapping in traditional neural network is difficult to accurately train, and has the advantages of high precision, high design efficiency.

The invention discloses a programmable electromagnetic metasurface based on a tantalum disulfide phase change gel unit, and belongs to the technical field of intelligent electromagnetic functional materials. The structure comprises a flexible substrate and an independently addressable functional unit array integrated on the flexible substrate, each unit is of a three-dimensional microstructure formed by temperature-sensitive hydrogel, and 1T'phase tantalum disulfide nanosheets and carbon nanotubes are uniformly dispersed in the three-dimensional microstructure. Local thermal stimulation is applied to the unit through a microelectrode or a photothermal effect, deformation of hydrogel and insulator-metal phase change of MoS are synchronously triggered, and the electromagnetic response characteristic of the unit is dynamically regulated and controlled. According to the design, the limitation of a traditional layered structure is broken through, reversible switching among an absorption state, a reflection state and a scattering state can be achieved, space programmable electromagnetic regulation and control are supported, and dynamic drawing of a pixel-level electromagnetic pattern is achieved. The method has the advantages of fast response, multiple regulation and control dimensions, flexible integration and the like, and provides an innovative solution for intelligent stealth, dynamic electromagnetic camouflage and reconfigurable microwave devices.

The application discloses a kind of electromagnetic super surface unit structure optimization method based on constraint space mapping, belong to electromagnetic super material design technical field.The application is to solve the problem of low optimization efficiency and difficult to handle constraint condition in the process of super surface unit structure optimization in prior art, mainly using mapping multidimensional structure variable to the convex constraint space formed by inequality constraint condition, and combining multi-objective optimization algorithm for efficient optimization.By using direction vector, scale factor to represent structure variable vector, the initial solution generation process that satisfies complex constraints is simplified, and the global search ability and convergence speed in the constraint space are improved.The method can quickly converge to local optimal solution under complex constraint conditions, and effectively find the Pareto optimal solution, thereby providing an efficient and accurate solution for multi-objective optimization of electromagnetic super surface unit structure.

The invention discloses a self-sensing electromagnetic reflection scattering response regulation and control device and method, and the device comprises a reconfigurable electromagnetic metasurface which comprises a plurality of metasurface units which are arranged at intervals, and each metasurface unit achieves the reflection phase adjustment of the metasurface unit through the flowing position of liquid metal in a micro-channel; the reconfigurable planar antenna comprises a plurality of antenna units, and the antenna units realize the frequency and directional diagram reconstruction of the antenna through the flowing position of the liquid metal in the micro-channel; and the driving control unit is used for generating a coding sequence of the reconfigurable electromagnetic metasurface according to the incident wave electromagnetic parameters sensed by the reconfigurable planar antenna and driving liquid metal in the reconfigurable electromagnetic metasurface to flow according to a position state corresponding to the coding sequence. According to the invention, the frequency and direction of incident electromagnetic waves are sensed by the reconfigurable planar antenna, real-time coding adjustment of the metasurface array is realized, and then adaptive electromagnetic reflection and scattering adjustment is realized.

The application provides a structure pattern generation model training method and device for an electromagnetic metasurface, applied to a server in a structure pattern generation model training system. The method comprises the following steps: taking one of a plurality of initial regions in a to-be-designed pattern of the electromagnetic metasurface as a to-be-generated region; determining a basic structure pattern of the electromagnetic metasurface based on a resonator pattern selected from a plurality of resonator patterns; determining a target size of the basic structure pattern based on a size selected from a preset size range; determining a structure pattern in the to-be-generated region according to the basic structure pattern and the target size; mapping the structure pattern in the to-be-generated region to each initial region to obtain a target structure pattern of the electromagnetic metasurface; simulating the target structure pattern to obtain electromagnetic response data and combining the target structure pattern to obtain a training data set, and training a structure pattern generation model by using the training data set. The accuracy of the electromagnetic metasurface structure pattern design can be improved.

This invention discloses an interference suppression method for a random phase-modulated electromagnetic metasurface, comprising: constructing a mathematical model for the modulated radar echo signal; wherein, a random phase-modulated electromagnetic metasurface is installed on the target surface, the radar transmitted signal is incident on the random phase-modulated electromagnetic metasurface, and the radar echo signal is generated after random time-domain phase modulation; the radar echo signal is subjected to digital down-conversion and delinear frequency modulation, followed by discrete sampling processing, and then self-mixing processing to estimate additional phase information; the radar echo signal after discrete sampling processing is phase-compensated considering noise, and then subjected to time-domain differential transformation and discrete Fourier transform; the phase change time is estimated using a subspace algorithm, and the interference modulation sequence is reconstructed based on the estimation result; the random phase interference is demodulated using the reconstructed interference modulation sequence, and matched filtering processing is performed to obtain the output signal.

The application relates to a 2-bit electromagnetic metasurface unit design method based on a 1-bit design idea, which comprises the following steps: step 1, a 1-bit metasurface unit 10 is designed by using an electromagnetic resonance method, the on-off of an electric control device is controlled, and the 1-bit metasurface unit 10 has a 270-degree reflection phase difference at a required frequency point; step 2, a phase-shifting layer 20 is added below the 1-bit unit 10 obtained in step 1, and a transmission metal via is introduced into the unit 10, so that electromagnetic energy on the unit 10 is transmitted to the phase-shifting layer 20; and step 3, a phase-shifting microstrip line on the phase-shifting layer 20 in step 2 is designed by using a guided wave method, the on-off of an electric control device is controlled, electromagnetic waves transmitted back to the 1-bit unit 10 through the phase-shifting layer 20 are phase-shifted by 90 degrees and 180 degrees, and finally a 2-bit electromagnetic metasurface unit with 0-degree, 90-degree, 180-degree and 270-degree phase control capabilities is formed. The method provided by the application combines the electromagnetic resonance method and the guided wave method, improves the defects of the electromagnetic resonance method, such as complex design process and the guided wave method, such as too many electric control devices, the design idea is clear, the method is simple, and a 2-bit unit with good performance can be quickly and efficiently designed.

The application discloses an active reconfigurable electromagnetic super surface supporting full-space multi-user asymmetric wireless communication, expands the super surface wireless communication technology to the full space, and can simultaneously perform independent information transmission on four users in the full space in a two-by-two group; by partitioning the chiral super surface and independently controlling the switch state of the switch diode in the row feeding unit of each channel, the amplitude of the electromagnetic wave in the transmission and reflection channel of the electromagnetic wave incident in the opposite direction can be independently controlled, so that the independent wireless information transmission of four users involved in the bidirectional transmission and reflection channel can be simultaneously realized; according to the difference of the propagation direction of the incident electromagnetic wave, two groups of independent transmission and reflection channels can be constructed in the same working frequency by means of the active super surface, and the application has the advantages of simple structure, easy control and low cost.