105 results about "Electromagnetic metasurface" patented technology

The invention belongs to the technical field of antenna engineering, and particularly relates to an ultra-wide-band low-profile phased-array antenna, which realizes broadband impedance matching characteristics and effectively expands the working bandwidth of the antenna by optimizing a dipole arm structure and introducing a matching branch knot and linear tapered slot composite structure on a radiation unit layer; on the array architecture level, an electromagnetic metasurface technology is adopted, array current distribution is improved through a periodic artificial electromagnetic structure, the active standing-wave ratio is remarkably reduced, the scanning angle of an array is widened, and meanwhile high compression of a system profile is achieved; on the structural design level, a three-dimensional composite structure of a transverse metal floor, a longitudinal radiation layer and a transverse metasurface layer is innovatively constructed, and the overall section height is reduced to 0.137 lambda Low (lambda Low is the lowest working frequency wavelength) through electromagnetic coupling and space folding technologies; in conclusion, the ultra wide band (the relative bandwidth is greater than or equal to 90%) and the low profile (lt; and the method is suitable for a new generation of broadband phased array radar system.

The invention discloses an electromagnetic metasurface sparse signal modeling method and device. The method comprises the steps that S1, sparse electromagnetic signals of an electromagnetic metasurface are acquired; s2, solving through signal sparse prior knowledge under the constraint of an electromagnetic constitutive equation to obtain a sparse signal distribution function; s3, according to the sparse signal distribution function, obtaining the coordinate system representation of the sparse signal in the Riemannian manifold space; and S4, according to the coordinate system representation of the sparse signal in the Riemannian manifold space, establishing a signal electromagnetic field manifold embedding model of the sparse signal mapped in the Riemannian space based on the electromagnetic metasurface. By the adoption of the technical scheme, the problems of an existing electromagnetic metasurface sparse signal modeling method in the aspects of algorithm efficiency, model adaptability and hardware collaboration are solved.

The invention relates to the technical field of dual circularly polarized antennas, and discloses a dual circularly polarized antenna, a sub-array, a one-dimensional phased array and a planar phased array. The antenna comprises a direct dual-circularly-polarized radiation structure layer, a circularly-polarized electromagnetic metasurface coupling layer and a circularly-polarized electromagnetic metasurface parasitic layer which are sequentially stacked from bottom to top. The broadband wide-angle scanning dual-circularly polarized phased array provided by the invention has the advantages of low cost, low profile, high radiation efficiency, broadband, dual-circularly polarized wide-angle beam scanning and the like, and is suitable for advanced satellite internet communication and navigation application.

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 discloses an amplitude-phase decoupling type metasurface, and relates to the technical field of electromagnetic metasurfaces. The invention aims to solve the problem that there is no amplitude-phase decoupling metasurface at present. The graphene composite board sequentially comprises a graphene adjustable structure, a foam board layer, a first metal patch, a second metal patch, a first substrate layer, a metal ground, a bonding layer and a second substrate layer from top to bottom, the graphene adjustable structure sequentially comprises a first lining plate layer, a first graphene layer, an ionic liquid layer, a second graphene layer and a second lining plate layer; the first metal patch and the second metal patch are arranged on the upper surface of the first substrate layer and are connected through the diode; a third square patch is further arranged on the upper surface of the first substrate layer, and the third square patch is connected with the second metal patch through an inductor; one end of the second metal conductive column is connected with the lower surface of the second substrate; the other end of the first metal conductive column is connected with the lower surface of the first metal patch. The invention is used for controlling electromagnetic waves.

The invention particularly relates to a two-dimensional wide-angle scanning phased array based on an electromagnetic metasurface, which comprises a radiation antenna and an electromagnetic band gap structure, the radiation antenna and the electromagnetic band gap structure are in coplanar design, the radiation antenna is positioned in the middle of the electromagnetic band gap structure, the upper layer of the electromagnetic band gap structure is metal with a hexagon and a rectangular branch, and the lower layer of the electromagnetic band gap structure is metal. The lower layer is the bottom of the dielectric substrate and is also made of metal, and the middle is a metalized via hole penetrating through the upper and lower layer metal. Wide beams are realized by utilizing leaky wave characteristics of an electromagnetic band gap structure and a left-right hand mode regulation and control line antenna beam in dispersion analysis, the whole antenna is of a planar structure and is only composed of a layer of dielectric substrate, the antenna array is arranged in a rectangular shape to form a two-dimensional antenna array surface, and the antenna has the characteristics of low profile, wide beam, wide angle scanning and low cost, and is suitable for large-scale popularization and application. And the structure is simple and the debugging difficulty is low.

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 invention relates to the technical field of electromagnetic metasurface polarization, in particular to a wide-incidence-angle metasurface polarization converter with stable bandwidth, which is formed by periodically arranging a plurality of units, each unit comprises two dielectric plate layers and three metal layers, and the two dielectric plate layers are arranged among the three metal layers at intervals. The two metal via holes are formed in the two ends of the central axis of the top-layer metasurface, and each metal via hole penetrates through the upper-layer dielectric plate to be connected with the top-layer metasurface and the middle metasurface; according to the invention, the method of loading the metal via holes is utilized, the unit structure size of the device is greatly reduced, and the problem of poor performance stability of the device under the condition of a large incident angle is solved. Simulation results show that the linear polarization wave can be converted into the orthogonal polarization wave within the broadband range of 7.03-10.91 GHz, the polarization conversion rate (PCR) is larger than 90%, the device can keep high polarization conversion performance within the wide incidence angle of 48 degrees, and the bandwidth compression ratio when the PCR is larger than 90% is controlled within 6%.

The invention discloses a task target-based generative electromagnetic metasurface structure design method and system, relates to the technical field of electromagnetic metasurfaces, establishes a task target, and deduces characteristic frequency response amplitude and phase characteristics required by a metasurface according to different functions of the metasurface. And a conditional variation generation network model KAE network improved by a Kolmogorov-Arnold network is designed by guiding the task to serve as a structure generation network. And using the improved deep neural network model as a forward prediction network to predict frequency response amplitude and phase characteristics. The metasurface structure closest to the task feature is retrieved by quantitatively calculating the distance difference between the target frequency response amplitude and the target phase. The precision of the encoder and decoder network is improved, and the problem of edge oscillation caused by the Fourier low-frequency subspace is relieved. The problem that one-to-many mapping in a traditional neural network is difficult to train accurately is solved, and the method has the advantages of high precision, high design efficiency and the like.

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.

The invention discloses a rectification antenna module and electronic equipment, and belongs to the technical field of communication. The rectification antenna module comprises a communication antenna array, a rectification module, a first dielectric plate, a second dielectric plate, a grounding layer, a feed module and a DC filtering module. The communication antenna array and the rectifier module are arranged on two opposite sides of the first dielectric plate, and the second dielectric plate is clamped between the rectifier module and the grounding layer; the communication antenna array comprises n antenna units, and each antenna unit is electrically connected with the feed module; the rectifier module comprises m first electromagnetic metasurface units, p second electromagnetic metasurface units and x rectifier diodes; the first electromagnetic metasurface units and the second electromagnetic metasurface units are arranged alternately, and any two adjacent first electromagnetic metasurface units and second electromagnetic metasurface units are electrically connected through a rectifier diode; a grounding point on the first electromagnetic metasurface unit is electrically connected with the grounding layer; the DC filtering module is electrically connected with the rectification module.

The present invention provides an absorbing metamaterial, comprising an electromagnetic metasurface material and a first electromagnetic absorbing material and an impedance matching material superimposed on the front and back surfaces of the electromagnetic metasurface material. The electromagnetic metasurface material is a series connection of a capacitor and an inductor in the equivalent circuit of the absorbing metamaterial, and the first electromagnetic absorbing material and the impedance matching material are both resistors in the equivalent circuit of the absorbing metamaterial. One or more metal microstructures are respectively provided in one or more regions of the electromagnetic metasurface material. In addition, the present invention also provides an absorbing structural part and a mobile carrier. The technical solution provided by the present invention can adapt to complex external electromagnetic environments. By combining the electromagnetic metasurface material with a functional absorbing substrate, the present invention changes the absorption frequency of the absorbing functional structure in response to dynamic changes in the electromagnetic interference frequency, thereby effectively improving the electromagnetic compatibility and anti-interference performance in complex electromagnetic environments.

The application discloses a transparent transmission metasurface system based on a game optimization algorithm, and relates to the technical fields of electromagnetic metasurfaces and radar electronic warfare. The application discloses a transparent transmission metasurface system based on a game optimization algorithm, and relates to the technical fields of electromagnetic metasurfaces and radar electronic warfare. The application discloses a transparent transmission metasurface system based on a game optimization algorithm, and relates to the technical fields of electromagnetic metasurfaces and radar electronic warfare. The application discloses a transparent transmission metasurface system based on a game optimization algorithm, and relates to the technical fields of electromagnetic metasurfaces and radar electronic warfare. The application discloses a transparent transmission metasurface system based on a game optimization algorithm, and relates to the technical fields of electromagnetic metasurfaces and radar electronic warfare. The application discloses a transparent transmission metasurface system based on a game optimization algorithm, and relates to the technical fields of electromagnetic metasurfaces and radar electronic warfare.

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 present invention relates to a reconfigurable electromagnetic metasurface with joint amplitude and phase control, which is formed by periodic extension of anisotropic basic units in a two-dimensional plane, and is intended to integrate a variety of near-field and far-field electromagnetic functions. By loading chip resistors and switching diodes along the horizontal and vertical directions of the metasurface units respectively, the metasurface can be made to have polarization-selective joint amplitude and phase control. Under vertically polarized incident waves, by switching the working state of the diodes in each unit, a series of far- and near-field control functions such as dual-beam scanning and reconfigurable focusing can be dynamically and flexibly realized; at the same time, for horizontally polarized incident waves, the metasurface can absorb the incident electromagnetic waves in a broadband and is not affected by the vertically polarized electromagnetic function. The present invention not only integrates dynamic wavefront control and broadband electromagnetic wave absorption functions, but also has the advantages of high integration and high polarization isolation. It is believed that it has important application prospects in the fields of low-scattering antenna arrays, wireless communications, and imaging.

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.