174 results about "Electromagnetic metasurface" patented technology

The invention discloses an interference suppression method for a random phase modulation electromagnetic metasurface. The interference suppression method comprises the following steps: constructing a mathematical model for a modulated radar echo signal; wherein a random phase modulation electromagnetic metasurface is installed on the surface of a target, a radar transmitting signal enters the random phase modulation electromagnetic metasurface, and after random time domain phase modulation, a radar echo signal is generated; discrete sampling processing is carried out after digital down-conversion and dechirping are carried out on radar echo signals, and then additional phase information is estimated after self-mixing processing is carried out. Phase compensation is carried out on the radar echo signal after discrete sampling processing under the condition that noise is considered, and then time domain differential transformation and discrete Fourier transformation are carried out; estimating a phase mutation moment by using a subspace algorithm, and reconstructing an interference modulation sequence based on an estimation result; and demodulating random phase interference by using the reconstructed interference modulation sequence, and performing matched filtering processing to obtain an output signal.

The invention relates to the technical field of electromagnetics, in particular to an ultra-wideband full-polarization large-angle beam scanning theory based on an electromagnetic metasurface, which comprises the following steps of: S1, regulating and controlling a beam far-field phase based on an array global reference phase; s2, adjusting and controlling far-field orthogonal polarization vector field superposition based on array factors to realize full-polarization beam control; and S3, theoretical calculation verification of full-polarization beam regulation and full-wave simulation verification of the full-polarization beam. According to the invention, a novel full-polarization wave beam regulation and control theory based on array factor regulation and control orthogonal polarization vector field superposition is provided, and theoretical calculation and full-wave simulation are carried out on the provided full-polarization wave beam regulation and control theory; according to the theory, the effectiveness and universality of realizing ultra-wideband and large-angle full-polarization beam regulation and control by only using one-bit phase resolution are verified.

The invention belongs to the technical field of electromagnetic metasurfaces, and particularly discloses an RCS (radar cross section) in-band reduction circularly polarized metasurface antenna based on C-band satellite communication, which comprises a first metasurface layer, a first dielectric layer, a second metasurface layer, a second dielectric layer, a slotted metal plate, a third dielectric layer and a feed antenna layer which are stacked from top to bottom, wherein the first metasurface layer is formed by arranging four groups of unit structures in a mirror image mode in the two-dimensional direction, and two kinds of square chamfered patches in each group of unit structures are arranged in a non-contact mode; the second metasurface layer is formed by arranging four groups of unit structures in a mirror image mode in the two-dimensional direction, and the L-shaped resonance rings in each group of unit structures are arranged in an array mode; the total number of the square chamfered patches is the same as that of the L-shaped resonant rings, and one L-shaped resonant ring is arranged below each square chamfered patch. The antenna can be suitable for satellite communication, can realize reduction of a radar cross section at 4-10.5 GHz, and has a huge application value in the aspect of an electromagnetic stealth 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 belongs to the technical field of multifunctional radomes, and particularly relates to a frequency-agile absorption and transmission integrated electromagnetic metasurface and radome, the frequency-agile absorption and transmission integrated electromagnetic metasurface comprises a plurality of basic units in periodic array distribution, and each basic unit comprises a wave transmission layer and a wave absorption layer which are oppositely arranged; the wave-transparent layer comprises a wave-transparent dielectric substrate, a wave-transparent metal foil layer I and a wave-transparent metal foil layer II, wherein the wave-transparent metal foil layer I and the wave-transparent metal foil layer II are arranged on the two sides of the wave-transparent dielectric substrate. The wave-transparent metal foil layer I comprises a plurality of metal spiral lines, the wave-transparent metal foil layer II comprises a metal foil, and the metal foil is provided with an annular gap and rectangular gaps distributed around the annular gap; the wave-absorbing layer comprises a wave-absorbing dielectric substrate, and a wave-absorbing metal foil layer I and a wave-absorbing metal foil layer II which are arranged on two sides of the wave-absorbing dielectric substrate; according to the invention, the wave-transparent communication and wave-absorbing isolation functions are realized at the same time, the wave-absorbing frequency band agility function is realized, and the wave-absorbing effect is better.

The invention relates to the technical field of artificial electromagnetic metasurfaces, in particular to a full-space multifunctional terahertz metasurface. The metasurface is composed of a plurality of metasurface units arranged periodically, and each metasurface unit sequentially comprises a first metal structure layer, a first middle dielectric layer, a grating layer, a second middle dielectric layer and a second metal structure layer from top to bottom. The first metal structure layer and the second metal structure layer are the same in structure and each comprise two C-shaped metal rings, and the two C-shaped metal rings are connected in a staggered mode to form a disconnected and staggered S shape. The first intermediate dielectric layer and the second intermediate dielectric layer are consistent in thickness; the grating layer comprises vanadium dioxide and copper which are alternately arranged, and multifunctional dynamic regulation and control of transmission, reflection and the whole space are achieved by controlling phase change of the vanadium dioxide. The metasurface provided by the invention can respectively realize the functions of polarization conversion, linear-circular polarization wave conversion, circular dichroism, asymmetric transmission and the like in different states.

The invention discloses an ultra-large octave wave absorber based on a photoconductive material, and belongs to the field of electromagnetic metasurfaces and metamaterials. Comprising a light response wave-absorbing metasurface and a light driving module capable of projecting different patterns on the surface of the light response wave-absorbing metasurface, array wave-absorbing units of different sizes are obtained on the light response wave-absorbing metasurface by switching the projected patterns, and impedance of a target frequency band is matched by changing equivalent capacitance / inductance of a wave-absorbing unit structure; the light driving module can project a preset light pattern on the light response wave-absorbing metasurface, so that the equivalent impedance distribution of the light response wave-absorbing metasurface is changed; according to the light response wave-absorbing metasurface, the conductivity distribution of the metasurface units is changed through light control, and the wave-absorbing frequency band is adjusted in real time, that is, dynamic adjustment of the wave-absorbing performance is achieved through non-contact light control. According to the invention, the limitation of narrow bandwidth and passive fixation of a traditional wave absorber is broken through, and electromagnetic wave control with ultra-large octave, high absorptivity and real-time reconfigurability is realized.

The invention relates to the technical field of radar communication, and discloses a detection identification method and system based on frequency modulation and pseudo-random coding, and the method comprises the steps: a detection device sets waveform parameters, and generates and transmits a Chirp signal to a target device through a radar transmitter; the target device performs frequency and phase modulation on the incident Chirp signal through the electromagnetic metasurface, and then reflects the modulated Chirp signal; and the detection equipment adopts a Chirp signal obtained in the same modulation mode as the target equipment as a matched filter, performs matched filtering on the received echo signal, calculates the code and the distance of the target equipment, and realizes radar detection and target identification. According to the invention, the target passively performs frequency and phase modulation on the incident radar signal through the electromagnetic metasurface, and the detection method can solve the target modulation coding information by knowing the target echo modulation mode so as to identify the target.

The invention discloses an intelligent metasurface design method fusing neural architecture search and multi-physics field coupling optimization. According to the method, a systematic process from high-dimensional parameter definition, coupling finite element simulation to multi-level agent model and multi-target genetic optimization is constructed: on one hand, complex coupling response of electromagnetic, mechanical and thermal fields is accurately described by means of a high-fidelity finite element means; and on the other hand, multi-layer neural network fast approximation and physical perception architecture search (Physics-Informed NAS) are combined, so that the dependence on expensive simulation during large-scale optimization is greatly reduced. Through multi-scale decomposition and a multi-target genetic algorithm (in combination with Pareto frontier analysis), balance is found between a global range and local details, and finally an efficient and flexible global optimization scheme is provided for multi-physics field collaborative design of the electromagnetic metasurface.

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 discloses an electromagnetic metasurface unit for realizing high-efficiency generation and focusing of vortex beams, which comprises a dielectric layer in the middle, an upper conductive metal layer and a lower conductive metal layer, the upper conductive metal layer and the lower conductive metal layer are arranged on the upper surface and the lower surface of the dielectric layer, and the thicknesses of the two conductive metal layers are both greater than the skin depth. The line width of the arc is equal to the line width t of the rectangle, the left end of the rectangle is connected with the inner wall of the arc, the arc is vertically symmetrical relative to the rectangle, and the lower conductive metal layer and the upper conductive metal layer have the same structure and parameter and are symmetrical relative to the y axis; meanwhile, the invention also discloses an electromagnetic metasurface for realizing high-efficiency generation and focusing of vortex beams and a generation method of the electromagnetic metasurface. The laser has the advantages of being simple in structure, low in manufacturing cost, small in metal loss, high in transmissivity and good in focusing effect.

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 electromagnetic metasurface unit structure optimization method based on constraint space mapping, and belongs to the technical field of electromagnetic metamaterial design. In order to solve the problems that in the prior art, constraint conditions are difficult to process in the metasurface unit structure optimization process, and optimization efficiency is low, the method mainly adopts the mode that multi-dimensional structure variables are mapped to a convex constraint space formed by inequality constraint conditions, and efficient optimization is carried out in combination with a multi-objective optimization algorithm. A structural variable vector is represented by using a direction vector and a proportionality coefficient, so that an initial solution generation process meeting complex constraints is simplified, and meanwhile, the global search capability of the algorithm and the convergence speed in a constraint space are improved. According to the method, the local optimal solution can be quickly converged under the complex constraint condition, and the Pareto optimal solution is effectively found, so that an efficient and accurate solution is provided for multi-objective optimization of the electromagnetic metasurface unit structure.

The invention belongs to the field of electromagnetic materials, and discloses a four-channel global electromagnetic metasurface and a design method and related device thereof, and the method comprises the steps: obtaining a phase profile map of the four-channel global electromagnetic metasurface in a target frequency band; obtaining an electromagnetic frequency response curve of each unit of the four-channel global electromagnetic metasurface in the target frequency band according to the phase profile map of the four-channel global electromagnetic metasurface in the target frequency band, and converting the electromagnetic frequency response curve of each unit in the target frequency band into a two-dimensional image of each unit in the target frequency band; and generating a unit image of each unit through a pre-trained unit image generator according to the two-dimensional image of each unit in the target frequency band, and obtaining a unit structure of each unit according to the unit image of each unit. A one-dimensional electromagnetic frequency response curve is converted into a two-dimensional image to solve the problem that input and output dimensions of a unit image generator are not matched, enough effective features can be extracted to accurately describe and predict, and the design efficiency and stability are effectively improved.

The invention relates to the field of electromagnetic super technology, in particular to a metasurface structure design method based on a joint discriminant generative adversarial network, which comprises the following steps: designing periodic arrangement of an electromagnetic metasurface unit structure and related parameters, inputting the periodic arrangement into electromagnetic simulation software to obtain electromagnetic response, and constructing a forward prediction data set and a reverse design data set; respectively segmenting the forward prediction data set and the reverse design data set into a training set and a test set; a forward prediction network model is constructed, a forward prediction data set is sent to a simulator network simulator for forward prediction for training, and parameters of the forward prediction network model are fixed after training is completed. According to the method, the pre-trained forward prediction network and the discriminator network for discriminating the spectrum similarity are added into the reverse design network, so that the network can well understand the relationship between the structural design and the overall optical response, more attention is paid to the generation of the absorption spectrum of the structure, a new design can be generated, and the design efficiency is improved. And the method can also be expanded to analysis of other metasurface structures.

The invention relates to a dual-frequency electromagnetic metasurface unit, array and method for enhancing underground signal coverage, and the metasurface unit comprises a dielectric layer which comprises a first dielectric layer and a second dielectric layer; the surface of the first dielectric layer is provided with a metal resonance layer, and a metal isolation layer is arranged between the two dielectric layers; feeder lines are arranged at the bottoms of the two dielectric layers; a first resonance piece of the metal resonance layer is located in the middle of the surface of the first dielectric layer, and a first metal column penetrating through the first resonance piece and the first dielectric layer is arranged in the middle of the first resonance piece; the second resonance piece and the third resonance piece are respectively positioned on two adjacent side parts of the surface of the first dielectric layer and are connected with the first resonance piece through a diode; one end of the second resonance piece and one end of the third resonance piece are respectively provided with metal columns. One end of the feeder line is connected with the metal column. According to the dual-frequency electromagnetic metasurface unit, array and method for enhancing underground signal coverage, energy loss and radiation loss can be reduced, and the dual-frequency electromagnetic metasurface unit, array and method have efficient electromagnetic wave reflection capacity in a low frequency range.

The invention discloses a radar detection method for an active electromagnetic regulation and control target. The method comprises the following steps: modeling a radar receiving echo signal after a radar transmitting signal is reflected by an electromagnetic metasurface arranged on a to-be-detected target; carrying out carrier frequency removal and frequency modulation preprocessing on the echo signal, and then carrying out phase unwrapping processing to obtain an absolute phase; performing windowing segmentation processing on the absolute phase, estimating the slope of each segmented phase, and taking the slope average value of the segmented phases as the slope estimation result of the absolute phase; constructing a phase distribution linear function by using the slope estimation result of the absolute phase, and subtracting the absolute phase from the phase distribution linear function to obtain a jump phase item estimation value of the electromagnetic metasurface; constructing a time domain phase compensation function according to the hopping phase item estimation value, and multiplying the time domain phase compensation function by the radar receiving echo signal to obtain a reconstruction signal; and performing matched filtering processing on the reconstructed signal to obtain an output signal.

The invention provides a metasurface optimization design method based on reinforcement learning, relates to the technical field of electromagnetic metasurfaces, and solves the problems that a metasurface design method based on supervised learning highly depends on a data set and the manufacturing cost of the data set is high. The method comprises the following steps: constructing a reinforcement learning environment model corresponding to a metasurface, and constructing a value network corresponding to a reinforcement learning algorithm; based on the constructed reinforcement learning environment model and the value network, through an intelligent agent and environment interaction mode, an objective function of the reinforcement learning environment model is updated, decision making of an intelligent agent is optimized, after a preset optimization requirement is met, the interaction process is stopped, and a metasurface optimization design result is output; wherein the learning environment model is reinforced to give an agent reward by comparing the difference between a target function value of a new state and a given optimization value; the method provided by the invention has stronger solving capability for nonlinear and uncertain complex environments, has the characteristics of intelligence and rapidness, and reduces data set dependency and manufacturing cost.

The invention relates to an active electromagnetic metasurface for realizing a programmable topological polariton waveguide. The metasurface is formed by periodically extending basic function units and variable capacitance diodes in a two-dimensional plane; the basic function unit comprises two layers of media, four layers of metal and metalized via holes; by changing the applied bias voltage, reconfigurable topology transmission of the magnetic polarization excimer dispersion topology from an ellipse to a straight line and a hyperbolic curve can be realized; by means of wavefront characteristics under different dispersion topologies, adjustable field channelization and reconfigurable plate focusing functions and programmable topology polariton waveguide design can be realized. The device supports flexible propagation and guide control of surface waves, has the advantages of low dimensionality, real-time response, continuous controllability and high stability, provides an effective platform for active optoelectronic integrated circuit research, facilitates design of a plane integrated high-speed communication assembly, high-resolution imaging and a high-sensitivity sensing positioning system, and has wide application prospects. The method has wide application prospects in the fields of near-field information processing, energy collection and the like.

The invention discloses a signal modulation and demodulation method based on an electromagnetic metasurface, and relates to the technical field of wireless communication, and the method comprises the following steps: S1, electromagnetic metasurface design: a programmable electromagnetic metasurface is designed, the electromagnetic metasurface is composed of a plurality of unit structures, and each unit structure is independently controlled; according to the signal modulation and demodulation method based on the electromagnetic metasurface, through a series of complete operation processes of encoding, modulation, transmission, demodulation, recovery and the like on digital information, the requirements for the transmission rate, stability and accuracy of the digital information in different application scenes are met, the signal modulation and demodulation strategy is improved, and the signal modulation and demodulation efficiency is improved. The continuity and accuracy of digital information transmission are ensured, and the situations of jamming, disconnection or data errors are avoided.

A reconfigurable antenna device comprises: a grounded waveguide structure having a metallic base wall and a metallic top wall provided with a periodic pattern of apertures 36, the waveguide structure defining a substantially linear cavity 35 with first and second ends; a first RF feed 34 configured to input a first RF signal into the first end of the linear cavity; and a lower electromagnetic metasurface layer 32 disposed on or adjacent to the base wall. An RF travelling wave is guided along the linear cavity such that RF energy incident on the lower metasurface layer interacts with and is modified by the metasurface elements and reflected towards and through the apertures. The metasurface may comprise passive non-reconfigurable elements or active reconfigurable elements. An upper electromagnetic metasurface layer may also be provided. The metasurface layers may facilitate beam steering and polarisation control.

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.