Absorption-deflection integrated multilayer electromagnetic metasurface

Abstract

The invention discloses an absorption-deflection integrated multilayer electromagnetic metasurface which comprises a first dielectric layer, a loss dielectric pattern layer, a second dielectric layer and a reflecting layer which are sequentially arranged from top to bottom, the loss dielectric layer is loss dielectric patterns arranged periodically, and each period is composed of 4-16 basic unit patterns. And each basic unit pattern comprises 1-6 sub-array units. The metasurface can achieve abnormal deflection of electromagnetic waves towards any expected direction under incidence of TE or TM polarized plane waves, energy coupling of the electromagnetic waves towards the expected direction is achieved, meanwhile, the effect of restraining energy of other orders of sidelobes is achieved, and the absorption and deflection efficiency of the metasurface exceeds 80%. Single-station radar stealth is achieved, and meanwhile the probability of being detected by double-station radars is reduced. The stealth metasurface is simple in structure and mature in processing technology, has complete theoretical support and stealth performance, and has important application significance in the field of stealth metasurfaces.

Description

Technical Field

[0001] The present invention belongs to the field of novel artificial electromagnetic supersurfaces, and relates to an absorption-deflection integrated multilayer electromagnetic supersurface, and in particular to an electromagnetic wave absorption-deflection integrated multilayer electromagnetic supersurface based on a lossy medium. Background Art

[0002] Metasurfaces have tremendous beam steering capabilities, including reflecting and refracting plane waves into unusual directions. This requires carefully designed subwavelength metacells in each period of the metasurface, which guarantee a single coupling to the desired Floquet-Bloch mode, or equivalently, suppress coupling to other modes. In more complex application environments, such as flat plate structures, large cone structures, cover structures, wing leading edges, etc., there is a wide range of application requirements for radar cross section (RCS) reduction. Therefore, new electromagnetic materials and design strategies need to be developed to achieve more efficient and covert electromagnetic wave control, thereby gaining tactical advantages in modern warfare.

[0003] In order to improve the efficiency of abnormal beam deflection and obtain greater freedom of structural design, the concept of evanescent wave is introduced. Evanescent wave is a special electromagnetic wave generated at the interface of medium. When light wave is incident from optically dense medium to optically sparse medium, if the incident angle is greater than the critical angle, total reflection will occur. At this time, although the light wave cannot penetrate the critical surface of the two media, a light wave will be generated along the direction parallel to the critical surface, and the complex amplitude of its electric field and magnetic field decreases exponentially with the distance away from the critical surface. This part of the light wave is the evanescent wave. The characteristic of evanescent wave is that the amplitude decays exponentially with the depth perpendicular to the interface, and the phase changes along the tangent direction, so it is also a surface wave. Evanescent wave is near-field, its intensity decays exponentially with the increase of distance, it is not absorbed, and its solution is a function of the distance from the boundary. Evanescent wave can be generated in many situations such as optics, electromagnetic radiation, acoustics, mechanical waves, etc.

[0004] Electromagnetic metasurfaces are artificial microstructures composed of periodically arranged unit structures, each of which can perform local phase and amplitude modulation on the incident light wave, thereby achieving regulation of the incident electromagnetic wave. By introducing abrupt phase changes in the unit structure of the metasurface, the propagation direction and wavefront shape of the light wave can be effectively changed, achieving abnormal reflection and refraction of the light wave. In order to improve the efficiency of abnormal reflection, the introduction of evanescent waves adds more degrees of freedom. By changing the physical size and material properties of the unit structure, the metasurface can adjust the impedance of the structure, thereby affecting the reflection and transmission characteristics of the light wave at the interface. Under certain conditions, the metasurface can use the principle of total internal reflection to confine the energy of the light wave near the interface, excite surface waves or evanescent waves, which can propagate along the interface without radiating into free space. This design can achieve high diffraction efficiency, which means that more incident light energy can be effectively modulated to the required diffraction order, thereby achieving large-angle light field regulation. The present invention proposes a multilayer electromagnetic metasurface with integrated electromagnetic wave absorption and deflection based on lossy dielectrics. By utilizing the impedance characteristics of the multilayer structure and obtaining the required impedance regular arrangement through rigorous theoretical analysis, the integrated electromagnetic wave absorption and deflection under the incidence of TE or TM polarized plane waves can be realized, and the efficiency of absorption and deflection exceeds 80%. In addition, the introduction of lossy dielectric materials not only reduces the energy of reflected electromagnetic waves, but also increases the possibility of its application in the field of metasurfaces. The present invention provides a new idea for the design of radar stealth metasurfaces and has potential application value in the field of integrated absorption-deflection electromagnetic metasurfaces. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and to provide a multi-layer electromagnetic metasurface with integrated electromagnetic wave absorption and deflection based on a lossy medium, which can realize integrated electromagnetic wave absorption and deflection and can be used in the fields of radar stealth, stealth radar antenna cover, digital imaging, etc.

[0006] The present invention adopts the following technical solution:

[0007] A multi-layer electromagnetic metasurface with integrated absorption and deflection, the overall structure includes four layers, from top to bottom, respectively, a first dielectric layer, a lossy dielectric pattern layer, a second dielectric layer, and a reflective layer. The lossy dielectric pattern layer is a periodically arranged lossy dielectric pattern, each period is formed by 4 to 16 basic unit patterns arranged in sequence along the x direction, each basic unit pattern contains 1 to 6 sub-array units arranged uniformly along the x direction, the basic unit pattern is an axisymmetric pattern about the x and y axes, each sub-array unit can be an I-shaped, rectangular, cross-shaped, H-shaped, or any other axisymmetric pattern about the x and y axes, the 4 to 16 basic unit patterns are arranged according to the required impedance rules to excite the evanescent wave mode to absorb sidelobe electromagnetic waves and clutter, the metasurface can couple the reflected electromagnetic wave energy in the desired abnormal deflection direction, realize the absorption and deflection reflection of the electromagnetic wave, and the absorption and deflection efficiency exceeds 80%.

[0008] Furthermore, each basic unit pattern in the period has the same length and width and is connected in sequence along the x direction, the sub-array units in each basic unit pattern are evenly arranged, and the lossy dielectric pattern layer forms a plane or a curved surface; the impedance rule is specifically to obtain a transfer matrix of each layer based on the transmission line theory, obtain a transfer matrix of each layer of the four-layer structure based on the transmission line theory, and then calculate the corresponding scattering matrix according to predetermined expected conditions. Based on the electromagnetic boundary conditions, the transfer matrix of the lossy dielectric pattern layer is composed of a multi-channel admittance matrix, so that the basic unit pattern satisfies the impedance rule arrangement based on the admittance conversion, and the appropriate evanescent wave mode can be excited to achieve efficient absorption and deflection reflection of electromagnetic waves.

[0009] Furthermore, the lossy dielectric pattern layer is a lossy material, and the material may be one or more of carbon black resistor film, carbon nanotube resistor film, graphene resistor film, graphite resistor film, silver nanowire resistor film, indium tin oxide and resistor film of its dopants, and its square resistance is 0.5 to 200Ω·sq -1 ; The reflective layer is a conductive material, and the material can be one or more of gold, silver, copper, aluminum, zinc oxide aluminum, nano silver wire, and indium tin oxide.

[0010] Furthermore, the thickness of the first dielectric layer and the second dielectric layer is 1 to 8 mm, and the dielectric constant thereof is 2 to 5. The material thereof may be one or more of silicon dioxide, epoxy resin, cyanate resin, phenolic resin, polymethyl methacrylate, polyethylene terephthalate, quartz glass, polyvinyl chloride, polydimethylsiloxane, polycarbonate, or a composite material of these materials and glass fiber, quartz fiber, or Kevlar fiber.

[0011] The beneficial effects of the present invention are: The present invention provides a multi-layer electromagnetic metasurface with integrated electromagnetic wave absorption and deflection based on lossy media. Compared with other electromagnetic metamaterials, it has the advantages of simple structure, mature processing technology and stealth performance. Both theory and experiment confirm that the metasurface generates appropriate evanescent wave modes, which greatly improves the efficiency of electromagnetic wave regulation. The good wave absorption performance comes from the impedance matching between different media constituting the multi-layer metasurface. Due to its electrical and magnetic properties and absorption capacity for electromagnetic waves of specific frequencies, it absorbs most of the electromagnetic waves, thereby greatly increasing the efficiency. Combined with the impedance arrangement, the metasurface produces a sudden phase change, thereby achieving the effect of abnormal deflection, which reduces specular reflection and backscattering and reduces the dual-station RCS. The metasurface of the present invention can realize the integration of electromagnetic wave absorption and deflection, and the efficiency of absorption and deflection exceeds 80%. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1(a)-(c) are the orthographic triaxial view, top view and local enlarged view of the absorption-deflection integrated electromagnetic metasurface of Example 1 of the present invention when the TE polarized electromagnetic wave is obliquely incident at 15° and deflected by 62°.

[0013] Figure 2 It is a model diagram of the arrangement of periodic units and sub-array units in Example 1. One period is composed of six basic unit patterns, each basic unit pattern is arranged with four sub-array units, and the lossy medium pattern layers are all rectangular patches (the first medium layer and the reflective layer are not shown in the figure).

[0014] Figure 3(a)-(b) are the real part (Figure 3(a)) and imaginary part curves (Figure 3(b)) of the surface impedance defined based on the generalized Snell's law and the electromagnetic boundary conditions under different reflection amplitudes.

[0015] Figures 4(a)-(b) are the far-field scattering diagram (Figure 4(a)) and radiation pattern (Figure 4(b)) of the fully reflective gradient metasurface under 15° oblique incidence of a TE polarized plane wave at a frequency of 10 GHz.

[0016] Figures 5(a)-(b) are the far-field scattering diagram (Figure 5(a)) and radiation pattern (Figure 5(b)) of the loss gradient metasurface under 15° oblique incidence of TE polarized plane wave at a frequency of 10 GHz.

[0017] Figures 6(a)-(b) are respectively the far-field scattering diagram (Figure 6(a)) and radiation pattern (Figure 6(b)) of the absorption-deflection integrated electromagnetic metasurface (Example 1) under the design of the present invention, where the lossy medium is a carbon nanotube resistor film and the frequency is 10 GHz, under the oblique incidence of a TE polarized plane wave at 15°.

[0018] Figure 7 yes Figure 4(b) , 5(b)and 6(b) for the radiation direction comparison.

[0019] Figure 8 (a)-(c) are respectively the orthographic triaxial view, top view and local enlarged view of the absorption-deflection integrated electromagnetic metasurface of Example 2 of the present invention when the TE polarized electromagnetic wave is incident at 0° and deflected at 40°.

[0020] Figures 9(a)-(b) are respectively the far-field scattering diagram (Figure 9(a)) and radiation pattern (Figure 9(b)) of the absorption-deflection integrated electromagnetic metasurface whose lossy medium is a graphite resistor film at a frequency of 8 GHz under 0° incidence of a TE polarized plane wave in Example 2 of the present invention.

[0021] Figure 10 (a)-(b) are respectively the orthographic triaxial view and top view of the absorption-deflection integrated electromagnetic metasurface of Example 3 of the present invention when the TE polarized electromagnetic wave is incident at 60° and deflected at 70°.

[0022] Figures 11(a)-(b) are respectively the far-field scattering diagram (Figure 11(a)) and radiation pattern (Figure 11(b)) of the absorption-deflection integrated electromagnetic metasurface in Example 3 of the present invention, whose lossy medium is a graphene resistor film, at a frequency of 5 GHz and under the incidence of a TE polarized plane wave at 60°. DETAILED DESCRIPTION

[0023] The specific technical solution implementation is described in detail below in conjunction with the accompanying drawings. It is obvious that the specific embodiments described below are only some embodiments of the present invention, and the present invention can also make similar changes and deformations. Other technicians in the field can make changes to the present invention without paying creative work to achieve similar beneficial effects, which are all within the protection scope of the present invention application.

[0024] Embodiment 1: A multilayer electromagnetic metasurface with integrated absorption and deflection, as shown in FIG1(a), the overall structure includes four layers, from top to bottom, respectively, a first dielectric layer 1, a lossy dielectric pattern layer 2, a second dielectric layer 3, and a reflective layer 4. In this example, the lossy dielectric is a carbon nanotube resistor film, as shown in FIG1(b). In this example, the lossy dielectric pattern layer 2 is composed of six basic unit patterns forming a periodic arrangement, each basic unit pattern is composed of four sub-array units, and the sub-array units are all rectangular figures. The sub-array unit sizes of different basic unit patterns may be different, but the length and width of each basic unit pattern are the same; all patterns are on the same plane of the second layer, and are all symmetrical about the x and y axes. In this example, the impedance distribution of the multilayer structure is adjusted by further adjusting the unit structure parameters through the impedance rule combined with the transmission line theory, so that the absorption and deflection efficiency are further increased.

[0025] As shown in Figure 1(a)-(c) and Figure 2As shown, let the period of each basic unit pattern structure along the x-axis be Px, and the period along the y-axis be Py; the thickness of the first dielectric layer is d1, and the thickness of the second dielectric layer is d2; in this example, one period is composed of six basic unit patterns, each basic unit pattern arranges four sub-array units, all of which are rectangular patches, and there are six types of rectangular patches in total, L1, L2, L3, L4, L5, L6 and W1, W2, W3, W4, W5, W6 are the length and width of the six rectangular patches respectively, and the thickness of the reflective layer is t. After optimization according to the impedance rule, the parameter values ​​of the supersurface in this example are as follows: Px=8mm, Py=20mm, d1=5.4mm, d2=6.6mm, L1=9.8mm, L2=14.3mm, L3=3.3mm, L4=7.0mm, L5=3.3mm, L6=18.4mm, W1=1.8mm, W2=1.8mm, W3=1.3mm, W4=1.9mm, W5=1.7mm, W6=1.8mm, t=0.035mm.

[0026] In addition, as shown in Figure 3(a)-(b), the surface impedance distribution under different reflection amplitudes defined based on the generalized Snell's law and electromagnetic boundary conditions, two abnormal reflection gradient metasurfaces are designed respectively: (1) total reflection (model 1); (2) reflection amplitude is 0.5 (model 2). It can be clearly seen that when the real part of the impedance is positive, it indicates that all areas of the metasurface have a loss effect on electromagnetic waves; if the imaginary part of the input impedance is positive, it can be regarded as a series connection of resistance and inductance, indicating that the circuit is inductive. If the imaginary part of the impedance is negative, or the impedance angle is negative, it can be regarded as a parallel connection of resistance and capacitive reactance, indicating that the circuit is capacitive. Therefore, the appropriate arrangement of the six units with inductance and capacitance can achieve impedance matching in high-frequency circuit design to optimize the efficiency of energy transmission and reduce the reflected signal of the side lobe.

[0027] The far-field scattering diagrams and radiation patterns of the full reflection gradient metasurface and the loss gradient metasurface at 10 GHz are shown in Figure 4(a)-(b) and Figure 5(a)-(b), respectively. It can be clearly seen that when the electromagnetic wave is incident at an oblique angle of 15°, compared with the electromagnetic wave beam abnormally reflected by the full reflection gradient metasurface, the absorption efficiency A=42.8% and the reflection efficiency η=18.2% of the loss gradient metasurface in the desired direction, while the reflection efficiency η of the full reflection gradient metasurface in the desired direction is only 14%. The loss gradient metasurface achieves the effect of absorbing electromagnetic waves and improving the abnormal reflection efficiency.

[0028] Figure 6 (a)-(b) are respectively the far-field scattering diagram and radiation pattern of the absorption-deflection integrated electromagnetic metasurface based on the carbon nanotube resistor film at 10GHz under Example 1 of the present invention (model 3). It can be seen more clearly from the figure that the intensity of electromagnetic waves reflected by other channels is significantly suppressed, most of the energy of the electromagnetic waves is absorbed and the remaining reflected wave energy is coupled to the desired reflection direction, which significantly reduces the probability of being detected by single-station and dual-station radars. The schematic diagram of the optimized metasurface in this example is shown in Figure 1. The overall structure of the metasurface is a first dielectric layer 1, a lossy dielectric pattern layer 2, a second dielectric layer 3, and a reflective layer 4. The dielectric constant of the first dielectric layer 1 is 2.65, the material of the lossy dielectric pattern layer 2 is a carbon nanotube resistor film, the dielectric constant of the second dielectric layer 3 is 2.65, and the material of the reflective layer 4 is copper.

[0029] like Figure 7 As shown, the metasurface designed by the present invention can achieve an absorption efficiency of A=57% and a desired direction reflection efficiency η=40% at 10GHz. Compared with the traditional gradient metasurface, it achieves the effect of abnormal reflection by coupling the energy of the incident electromagnetic wave to the desired direction while absorbing the electromagnetic wave, realizing the stealth of the single-station radar while reducing the probability of being detected by the dual-station radar. The metasurface has a simple structure, mature processing technology, stealth performance, and has important application significance in the field of stealth metasurfaces.

[0030] Embodiment 2: An absorption-deflection integrated multilayer electromagnetic metasurface, as shown in FIG8(a), the overall structure includes four layers, from top to bottom, respectively, a first dielectric layer 1, a lossy dielectric pattern layer 2, a second dielectric layer 3, and a reflective layer 4. The lossy dielectric material is a graphite resistor film, as shown in FIG8(b). In this embodiment, the dielectric constant of the first dielectric layer 1 is 2; the lossy dielectric pattern layer 2 is composed of 4 basic unit patterns forming a period, which are arranged in a periodic manner, and each basic unit pattern is composed of 6 sub-array units, and the sub-array units are all I-shaped patterns. All patterns are on the same plane of the second layer and are symmetrical about the x and y axes; the dielectric constant of the second dielectric layer 3 is 2, and the impedance distribution of the multilayer structure is adjusted by optimizing and adjusting the unit structure parameters to meet the required impedance rules.

[0031] Furthermore, let the period of the unit structure along the x-axis be Px and along the y-axis be Py; the thickness of the first dielectric layer is d1 and the thickness of the second dielectric layer is d2; in this example, one period is composed of four basic unit patterns, and each basic unit pattern arranges six sub-array units, all of which are I-shaped patches. There are four types of I-shaped patches in total. L1, L2, L3, L4 and W1, W2, W3, W4 are respectively the length (i.e., the vertical length of the middle vertical stroke of the "I") and width (i.e., the width of the middle vertical stroke of the "I") of the rectangle in the middle of the 4 I-shaped patches. C1, C2, C3, C4 and W1, W2, W3, W4 are respectively the length (i.e., the horizontal length of the horizontal stroke of the "I") and width (i.e., the width of the horizontal stroke of the "I") of the rectangles at both ends of the I-shaped patch; the thickness of the reflective layer is t. After optimization, the values of the parameters of this metasurface are as follows: Px = 4mm, Py = 10mm, d1 = 1mm, d2 = 11mm, L1 = 6.8mm, L2 = 4.3mm, L3 = 6.3mm, L4 = 2.0mm, C1 = 1.8mm, C2 = 2.8mm, C3 = 3.3mm, C4 = 4.9mm, W1 = 0.8mm, W2 = 0.8mm, W3 = 0.3mm, W4 = 0.9mm, t = 0.035mm. This metasurface can achieve an efficiency of more than 80% for electromagnetic wave absorption and deflection. Its far-field scattering pattern and radiation pattern at 8 GHz under the incidence of a TE-polarized plane wave at 0° are shown in Figure 9.

[0032] Example 3: A multi-layer electromagnetic metasurface for integrated absorption and deflection, as shown in Figure 10(a), the overall structure includes four layers, from top to bottom are the first dielectric layer 1, the lossy dielectric pattern layer 2, the second dielectric layer 3, and the reflective layer 4. In this example, the lossy dielectric is a graphene resistive film, as shown in Figure 10(b). In this example, the relative permittivity of the first dielectric layer 1 is 5; the lossy dielectric pattern layer 2 is composed of 16 basic unit patterns arranged in a periodic pattern. Each basic unit pattern is composed of 1 sub-array unit, and the sub-array units are all cross-shaped patterns. All the patterns are on the same plane of the second layer and are all symmetric about the x and y axes; the relative permittivity of the second dielectric layer 3 is 5, and the impedance distribution of the multi-layer structure is further adjusted by adjusting the unit structure parameters.

[0033] Furthermore, let the period of the unit structure along the x-axis be Px, and the period along the y-axis be Py; the thickness of the first dielectric layer is d1, and the thickness of the second dielectric layer is d2; in this example, one period is composed of sixteen basic unit patterns, each basic unit pattern arranges a subarray unit, all of which are cross-shaped patches (composed of two identical rectangles crossed vertically), with a total of sixteen types of cross-shaped patches, L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11, L12, L13, L14, L15, L16 and W1, W2, W3, W4, W5, W6, W7, W8, W9, W10, W11, W12, W13, W14, W15, W16 are the lengths and widths of the 16 cross-shaped patch rectangles respectively; the thickness of the reflective layer is t. After optimization, the values ​​of the parameters of the super surface in this example are as follows: Px = 10 mm, Py = 10 mm, d1 = 4 mm, d2 = 8 mm, L1 = 1.8 mm, L2 = 2.3 mm, L3 = 6.3 mm, L4 = 7.0 mm, L5 = 8.8 mm, L6 = 9.0 mm, L7 = 9.3 mm, L8 = 9.8 mm, L9 = 6.8 mm, L10 = 8.3 mm, L11 = 6.3 mm, L12 = 5.0 mm, L13 = 4.8 mm, L14 = 4.3 mm, L15 = 3.3mm, L16 = 2.0mm, W1 = 1.8mm, W2 = 1.3mm, W3 = 1.3mm, W4 = 2.0mm, W5 = 1.8mm, W6 = 1.3mm, W7 = 1.3mm, W8 = 2.0mm, W9 = 1.8mm, W10 = 1.3mm, W11 = 1.3mm, W12 = 2.0mm, W13 = 1.8mm, W14 = 1.3mm, W15 = 1.3mm, W16 = 2.0mm, t = 0.035mm. The metasurface can achieve an efficiency of more than 80% in absorbing and deflecting electromagnetic waves. Its far-field scattering diagram and radiation pattern at 5GHz under 60° incidence of TE polarized plane wave are shown in Figure 11.

[0034] The above-described embodiments are only some of the preferred solutions of the present invention, but they are not intended to limit the present invention. A person skilled in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A multi-layer electromagnetic metasurface with integrated absorption and deflection, characterized in that: The invention comprises a first dielectric layer, a lossy dielectric pattern layer, a second dielectric layer and a reflective layer which are arranged in sequence from top to bottom. The lossy dielectric pattern layer is a periodically arranged lossy dielectric pattern. Each period is formed by 4 to 16 basic unit patterns arranged in sequence along the x direction. Each basic unit pattern contains 1 to 6 sub-array units arranged uniformly along the x direction. The basic unit pattern is an axisymmetric figure about the x and y axes. The 4 to 16 basic unit patterns are arranged according to the required impedance rules to excite the evanescent wave mode to absorb sidelobe electromagnetic waves and clutter, and at the same time realize the absorption and deflection reflection of electromagnetic waves. The absorption and deflection efficiency exceeds 80%.

2. The absorption-deflection integrated multi-layer electromagnetic metasurface according to claim 1, characterized in that: The impedance rule is specifically as follows: under the conditions of determining the first dielectric layer, the lossy dielectric pattern layer, the second dielectric layer, and the reflective layer, the transfer matrix of each layer of the four-layer structure is obtained based on the transmission line theory, and then the corresponding scattering matrix is ​​calculated according to the predetermined expected conditions. Based on the electromagnetic boundary conditions, the transfer matrix of the lossy dielectric pattern layer is composed of a multi-channel admittance matrix, so that the basic unit pattern satisfies the impedance rule arrangement based on admittance conversion, stimulates the appropriate evanescent wave mode, and realizes efficient absorption and deflection reflection of electromagnetic waves.

3. The absorption-deflection integrated multi-layer electromagnetic metasurface according to claim 1, characterized in that: The basic unit patterns in the period have the same length and width and are connected in sequence along the x direction, and the sub-array units in each basic unit pattern are evenly distributed.

4. The absorption-deflection integrated multi-layer electromagnetic metasurface according to claim 1, characterized in that: The lossy dielectric pattern layer is a plane or a curved surface.

5. The absorption-deflection integrated multi-layer electromagnetic metasurface according to claim 1, characterized in that: The sub-array unit is an arbitrary figure that is axisymmetric about the x-axis and the y-axis.

6. The absorption-deflection integrated multi-layer electromagnetic metasurface according to claim 1, characterized in that: The materials of the first dielectric layer and the second dielectric layer have a dielectric constant of 2 to 5; the materials are one or more of silicon dioxide, epoxy resin, cyanate resin, phenolic resin, polymethyl methacrylate, polyethylene terephthalate, quartz glass, polyvinyl chloride, polydimethylsiloxane, polycarbonate, or a composite material made of one or more of these materials and one or more of glass fiber, quartz fiber, and Kevlar fiber.

7. The absorption-deflection integrated multi-layer electromagnetic metasurface according to claim 1, characterized in that: The material of the lossy dielectric pattern layer is one or more of carbon black resistor film, carbon nanotube resistor film, graphene resistor film, graphite resistor film, silver nanowire resistor film, indium tin oxide and resistor film of its dopants, and its square resistance is 0.5-200Ω·sq -1 .

8. The absorption-deflection integrated multi-layer electromagnetic metasurface according to claim 1, characterized in that: The thickness of the first dielectric layer and the second dielectric layer is 1-8 mm, and the dielectric constant thereof is 2-5.

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