A transparent, reconfigurable multifunctional metasurface

Abstract

The present invention discloses a transparent reconfigurable multifunctional metasurface, which includes N×N basic units arranged periodically to form a unit array, where N is a natural number; each basic unit is controlled by the same signal, and the control signal of the entire unit array is controlled by an external circuit; the present invention introduces a PIN tube as an adjustable device to perform multifunctional regulation on the amplitude of the transmitted wave and the reflected wave, and the control is precise and can be switched quickly; the present invention can achieve transmission enhancement and electromagnetic shielding for TE and TM polarized incident waves with an incident angle within 0‑80°, thereby improving the electromagnetic properties of the original glass. The present invention introduces the design of metal folding lines to maintain high optical transparency while maintaining the reconfigurable electromagnetic properties. In summary, compared with traditional designs, the present invention has stronger electromagnetic wave regulation capabilities, better incident wave adaptability and higher optical transparency.

Description

Technical Field

[0001] The present invention relates to the technical field of reconfigurable multifunctional supersurfaces, and in particular to a transparent reconfigurable multifunctional supersurface. Background Art

[0002] Reconfigurable metasurfaces have received extensive attention in the field of improving wireless electromagnetic communication channels due to their great potential in improving channels and enhancing communication quality. The practical application capabilities of reconfigurable metasurfaces have always attracted much attention, so designing a reconfigurable metasurface with strong control capabilities and wide application scenarios is a continuous pursuit of the engineering and academic communities. Traditional reconfigurable metasurfaces can improve the quality of communication channels by being deployed on indoor and outdoor walls, in vehicles, or near communication equipment. However, traditional reconfigurable metasurfaces are all processed using printed circuit board (PCB) technology, and their structures are not light-transmissive, which makes it impossible for metasurfaces to be deployed in some specific scenarios, such as glass curtain walls, automotive glass, high-speed rail glass, etc., thereby limiting the application of metasurfaces.

[0003] As a natural material, traditional glass media passively affects wireless communication channels. Its electromagnetic properties are determined by relative dielectric constant, relative magnetic permeability and thickness. Once processed, its electromagnetic properties cannot be adjusted. Although transparent conductive materials such as ITO, metal grids, and nanosilver wires have been introduced into the design of previous transparent metasurfaces, most of these transparent metasurfaces are passive metasurfaces. Once the structural design is completed, their functions will be fixed and multifunctional reconfiguration cannot be achieved. A small number of transparent metasurfaces can achieve functional switching by loading active devices and mechanical regulation, but their regulation capabilities are limited:

[0004] The transparent metasurface proposed in "Transparent dynamic metasurface for a visually unaffectedreconfigurable intelligent surface: controlling transmission / reflection andmaking a window into an RF lens" achieves function switching by mechanically adjusting the distance from the dielectric plate to the metasurface. This design has a slow function switching speed, a high profile and is only applicable to normal incidence.

[0005] The transparent metasurface proposed in "Optical-transparent metasurface for flexible manipulation and analoginformation modulation" achieves function switching by changing the voltage of the varactor diode, but it can only control the amplitude of the reflected wave and is only applicable to normal incidence.

[0006] Therefore, a transparent reconfigurable multifunctional metasurface with stronger controllability and wider application scenarios is urgently needed. The transparent reconfigurable multifunctional metasurface is expected to achieve the following functions: 1. Applicable to dual-polarized incident waves 2. Applicable to wide incident angles 3. Able to control electromagnetic waves in the entire space 4. Multifunctional and fast function switching 5. Low profile 6. High light transmittance Summary of the invention

[0007] Technical problem: In view of this, the purpose of the present invention is to provide a transparent reconfigurable multifunctional metasurface to solve the technical problem mentioned in the background technology. Thus, within a preset frequency band, the amplitude of electromagnetic waves in the entire space can be flexibly controlled.

[0008] Technical solution: To achieve the above-mentioned purpose, the present invention adopts a transparent reconfigurable multifunctional metasurface, wherein the transparent reconfigurable multifunctional metasurface comprises N×N basic units arranged periodically to form a unit array, where N is a natural number; each basic unit is controlled by the same signal, and the control signal of the entire unit array is controlled by an external circuit;

[0009] The layered structure of each basic unit includes, from top to bottom:

[0010] The first layer is the upper metal pattern layer;

[0011] The second layer is the upper PET layer;

[0012] The third layer is the upper bonding layer;

[0013] The fourth layer is a glass dielectric layer;

[0014] The fifth layer is the lower bonding layer;

[0015] The sixth layer is the lower PET layer;

[0016] The seventh layer is the lower metal pattern layer.

[0017] Among them, the upper metal pattern layer and the upper PET layer together constitute the upper reconfigurable transparent film; the lower PET layer and the lower metal pattern layer together constitute the lower reconfigurable transparent film; the upper reconfigurable transparent film and the lower reconfigurable transparent film are connected to the glass medium layer through an adhesive layer.

[0018] The upper metal pattern layer includes two upper metal folding lines perpendicular to each other, and the four external ports of the two upper metal folding lines perpendicular to each other are respectively located in the middle of the four sides of the upper metal pattern layer, and PIN tube A and PIN tube B are loaded in series on the upper metal folding lines along the x direction.

[0019] The lower metal pattern layer includes two mutually perpendicular lower metal folding lines, and the four external ports of the two mutually perpendicular lower metal folding lines are respectively located in the middle of the four sides of the lower metal pattern, and PIN tube C and PIN tube D are loaded in series on the lower metal folding lines along the y direction.

[0020] The PIN tube A, PIN tube B, PIN tube C and PIN tube D are in a conducting state when the bias current is 1mA, in a non-conducting state when the bias voltage is 0mA, and in an intermediate state when the bias voltage is between 0mA and 1mA; the internal equivalent circuits of the PIN tubes in the conducting, non-conducting and intermediate states are different, thereby generating different electromagnetic responses to electromagnetic waves incident on the reconfigurable multifunctional metasurface, thereby realizing multifunctional spatial electromagnetic wave regulation.

[0021] When the bias current of the PIN tube A, PIN tube B, PIN tube C and PIN tube D is 0mA, they are in a transmission enhancement state; when the bias current is 10mA, they are in an electromagnetic shielding state; when the bias current is between 0mA and 1mA, they are in a dual-channel amplitude modulation communication state.

[0022] The dual-channel amplitude modulation communication state is that the metasurface controls the amplitude of the reflected wave and the transmitted wave generated by the incident wave. This control method is called full-space control.

[0023] The metasurface is suitable for wide incident angle and dual polarization application scenarios; wherein the incident angle of the incident wave is applicable in the range of 0-80°; wherein both TE polarization and TM polarization incident waves are applicable.

[0024] The transparent reconfigurable multifunctional metasurface maintains optical transparency in addition to having electromagnetically reconfigurable properties.

[0025] Among them, the first upper metal pattern layer and the seventh lower metal pattern layer jointly regulate the incident electromagnetic waves.

[0026] The upper and lower metal pattern layers are loaded with a total of 4 PIN tubes. By controlling the direct current on both sides of the PIN tubes, the incident electromagnetic waves can be regulated in real time and quickly.

[0027] The basic unit does not introduce an additional DC feeder layer to control the DC voltage on both sides of the PIN tube, and the metal folding line in the metal pattern layer that does not load the PIN tube in series not only responds to the incident electromagnetic wave, but also acts as a DC feeder to control the voltage of the PIN tube. This simple structural design is conducive to the design and processing of transparent metasurfaces.

[0028] Beneficial effects: Compared with the prior art, the technical solution of the present invention has the following advantages:

[0029] 1. The present invention can flexibly adjust the amplitude of electromagnetic waves in the entire space within a preset frequency band by simply pasting reconfigurable transparent films on both sides of the glass surface.

[0030] 2. The transparent reconfigurable multifunctional metasurface of the present invention is applicable to dual-polarized incident waves: vertically polarized waves (TE) and horizontally polarized waves (TM); and the transparent reconfigurable multifunctional metasurface has good amplitude control capability for incident waves with incident angles of 0°-80°. This dual-polarized, wide-incident-angle reconfigurable multifunctional metasurface greatly increases its adaptability to various incident wave scenarios and has high robustness.

[0031] 3. Compared with traditional flat glass, a natural material that has a fixed response to incident electromagnetic waves, the transparent reconfigurable multifunctional metasurface can achieve full-space, multifunctional electromagnetic wave regulation by changing the feeding voltage:

[0032] When the bias current of the PIN tube is 1 mA, the transparent reconfigurable multifunctional metasurface has high electromagnetic transmittance for TE and TM polarized incident waves with incident angles within 0-80°. Compared with traditional flat glass, it has a transmission enhancement effect, which is beneficial to the transmission rate of wireless electromagnetic communication signals from indoors to outdoors.

[0033] When the bias current of the PIN tube is 0mA, the transparent reconfigurable multifunctional metasurface has a high electromagnetic reflectivity for TE and TM polarized incident waves with an incident angle of 0-80°. Compared with traditional flat glass, it has an electromagnetic shielding effect, which can shield the interference of outdoor electromagnetic waves on indoor electromagnetic communications, and is beneficial to the transmission rate of wireless electromagnetic communication signals from indoor to indoor.

[0034] When the bias current of the PIN tube is an intermediate value between 0mA and 1mA, the transparent reconfigurable multifunctional metasurface can adjust the transmission amplitude and reflection amplitude of the incident electromagnetic wave. By changing the magnitude of the bias current, the electromagnetic wave in the whole space can be continuously modulated, so dual-channel amplitude modulation communication can be achieved through the control signal.

[0035] 4. The transparent reconfigurable multifunctional metasurface has good electromagnetic control capabilities and a high visible light transmittance, maintaining the light transmittance of the original transparent flat glass to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of the transparent reconfigurable multifunctional metasurface provided in Example 1;

[0037] Figure 2 A front view of the transparent reconfigurable multifunctional metasurface provided in Example 1;

[0038] Figure 3 The upper metal pattern layer of the transparent reconfigurable multifunctional metasurface provided in Example 1, wherein the portion in the dotted line frame is a metal pattern in a basic unit;

[0039] Figure 4 A metal pattern in a basic unit of the transparent reconfigurable multifunctional metasurface provided in Example 1 and a local enlarged view thereof;

[0040] Figure 5 It is a schematic diagram of the transmission enhancement state under a DC bias of 1 mA;

[0041] (a) shows the relationship between the electromagnetic transmission coefficient and the frequency of the TE polarized wave at the incident angles of 0°, 40°, and 80° for the ordinary flat glass without the reconfigurable transparent film and the ordinary flat glass with the reconfigurable transparent film (transparent reconfigurable multifunctional metasurface) pasted on both sides in the transmission enhanced state. The transmission is enhanced under a DC bias of 1 mA.

[0042] (b) is the relationship between the electromagnetic transmission coefficient and frequency of TM polarized wave at incident angles of 0°, 40°, and 80°.

[0043] Figure 6 The curves show the relationship between the transmission coefficient and the incident angle at a frequency of 5.2 GHz under the transmission enhanced state for an ordinary flat glass without a reconfigurable transparent film and an ordinary flat glass with a reconfigurable transparent film (transparent reconfigurable multifunctional metasurface) pasted on both sides in Example 1, as well as the relationship between the transmittance enhancement performance of the transparent reconfigurable multifunctional metasurface and the incident angle.

[0044] (a) is the relationship between the transmission coefficient and antireflection performance of TE polarized waves and the incident angle,

[0045] (b) is the relationship between the transmission coefficient and antireflection performance of TM polarized wave and the incident angle.

[0046] Figure 7 It is a schematic diagram of electromagnetic shielding state under a DC bias of 0mA;

[0047] (a) is the electromagnetic transmission coefficient of the transparent reconfigurable multifunctional metasurface provided in Example 1 under the electromagnetic shielding state, when the TE polarized wave is at incident angles of 0°, 40°, and 80°,

[0048] (b) is the electromagnetic transmission coefficient of TM polarized wave at incident angles of 0°, 40°, and 80°, in the electromagnetic shielding state under a DC bias of 0 mA.

[0049] Figure 8 The curves show the relationship between the transmission coefficient and the incident angle at a frequency of 5.2 GHz under electromagnetic shielding state for an ordinary flat glass without a reconfigurable transparent film and an ordinary flat glass with a reconfigurable transparent film (transparent reconfigurable multifunctional metasurface) pasted on both sides in Example 1, as well as the relationship between the shielding performance of the transparent reconfigurable multifunctional metasurface and the incident angle.

[0050] (a) is the relationship between the transmission coefficient and shielding performance of TE polarized waves and the incident angle,

[0051] (b) is the relationship between the transmission coefficient and shielding performance of TM polarized waves and the incident angle.

[0052] Fig. 9 The transparent reconfigurable multifunctional metasurface in Example 1 is in the dual-channel amplitude modulation communication state when the DC bias is 0-1mA, and the normal incidence transmission and reflection coefficients under different bias currents.

[0053] (a) is the transmission coefficient under different bias currents.

[0054] (b) is the reflection coefficient under different bias currents.

[0055] The attached pictures include:

[0056] Upper metal pattern layer 1, PIN tube A1.1, PIN tube B1.2, upper metal folding line A1.3;

[0057] Upper PET layer 2;

[0058] Upper adhesive layer 3

[0059] Glass dielectric layer 4;

[0060] Lower adhesive layer 5;

[0061] Lower PET layer 6;

[0062] Lower metal pattern layer 7, PIN tube C7.1, PIN tube D7.2, lower metal folding line B7.3. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] Example 1

[0065] See also Figure 1-Figure 4 This embodiment provides a transparent reconfigurable multifunctional metasurface, wherein the transparent reconfigurable multifunctional metasurface includes: N×N basic units are periodically arranged to form a unit array, wherein each basic unit is controlled by the same signal, and the control signal of the entire unit array is controlled by an external circuit.

[0066] Specifically, in this embodiment, the basic unit includes, from top to bottom:

[0067] The first layer is an upper metal pattern layer 1, wherein the upper metal pattern layer comprises a PIN tube A1.1, a PIN tube B1.2 and two mutually perpendicular metal folding lines A1.3; wherein the two PIN tubes are loaded in series on the metal folding lines along the x direction through pads.

[0068] The second layer is the upper PET layer 2;

[0069] The third layer is the upper bonding layer 3;

[0070] The fourth layer is a glass medium layer 4;

[0071] The fifth layer is the lower adhesive layer 5;

[0072] The sixth layer is the lower PET layer 6;

[0073] The first layer is the lower metal pattern layer 7, wherein the lower metal pattern layer comprises a PIN tube C7.1, a PIN tube D7.2 and two mutually perpendicular metal folding lines B7.3; wherein the two PIN tubes are loaded in series on the metal folding line along the y direction.

[0074] Among them, the first upper metal pattern layer 1 and the seventh lower metal pattern layer 7 together play a role in regulating the incident electromagnetic wave;

[0075] Among them, the upper metal pattern layer 1 and the upper PET layer 2 together constitute the upper reconfigurable transparent film, and the lower PET layer 6 and the lower metal pattern layer 7 together constitute the lower reconfigurable transparent film; wherein, the upper reconfigurable transparent film and the lower reconfigurable transparent film are connected to the glass medium layer through the upper adhesive layer 3 and the lower adhesive layer 5.

[0076] Specifically, the reconfigurable transparent film provided in this embodiment can be easily prepared using flexible circuit board (FPC) technology, more specifically:

[0077] 0.188mm thick single-sided copper-clad PET film (ε r =3.2, tanδ=0.006) is used as the substrate of the upper metal pattern layer 1. Two mutually perpendicular metal folding lines are etched on the single-sided copper-clad PET film through the FPC process, and the metal folding lines loaded with the PIN tube are reserved for pads; the design of the lower metal pattern layer 7 is similar to that of the upper metal pattern layer 1.

[0078] The surface copper layer of the metal pattern layer is 0.035 mm thick and consists of two mutually perpendicular metal folding lines. This symmetrical structure makes the designed transparent reconfigurable multifunctional metasurface polarization insensitive. The folding bending angle α of the metal folding line is 60°.

[0079] The glass dielectric layer is 2 mm thick ordinary flat glass, model Borofloat 33, with a relative dielectric constant of 4.6 and an electric loss angle of 0.0085.

[0080] The model of the PIN tube described in this example is SMP1321-040LF. This model of PIN tube has a small package, low loss, and low cost, and can be well applied to the design of a transparent reconfigurable multifunctional metasurface. The PIN tube is loaded on the metasurface unit by welding on the pads on the folded metal wire.

[0081] The line width w of the metal folding line in this embodiment is 0.15mm. This thin metal pattern structure greatly reduces the metal pattern's blocking of visible light; the area occupied by the metal folding line of the basic unit in this embodiment only accounts for 7.8% of the entire unit area. The area of ​​the PIN tube in the SOD-882 package is only 0.6mm 2 , the blocking of visible light by the PIN tube is almost negligible; therefore, the theoretical maximum transmittance of a transparent reconfigurable multifunctional metasurface in this embodiment is 92%.

[0082] Specifically, Figure 1-Figure 4 As shown, in this embodiment, the specific dimensions of the metal pattern layer, PET layer, and glass medium layer of the basic unit are:

[0083] The size of the basic unit is P = 8.5 mm, the bending angle of the metal folding line is α = 60°, the line width of the metal folding line is W = 0.15 mm, and the thickness of the glass dielectric layer is h glass =2mm, the layer thickness of the upper PET layer and the lower PET layer h pet= 0.188mm, the distance between two PIN tubes of the same metal pattern layer l = 3.7mm. The length of the pad l pad =0.6mm, width w pad =0.4mm, pad spacing l pad =0.3mm.

[0084] This embodiment provides a transparent reconfigurable multifunctional metasurface, which can multifunctionally control the amplitude of electromagnetic waves in the entire space by changing the bias current passing through the PIN tube:

[0085] 1) When the bias current of the PIN tube is 1 mA, this embodiment provides a transparent reconfigurable multifunctional metasurface in a transmission-enhanced state, which has high transmittance for TE and TM polarized incident waves with an incident angle within 0-80°.

[0086] 2) When the bias current of the PIN tube is 0 mA, this embodiment provides a transparent reconfigurable multifunctional metasurface in an electromagnetic shielding state, which has high reflectivity for TE and TM polarized incident waves with an incident angle within 0-80°.

[0087] 3) When the bias current of the PIN tube is between 0mA-1mA, this embodiment provides a transparent reconfigurable multifunctional metasurface in a dual-channel amplitude modulation communication state; the dual-channel amplitude modulation communication means that by loading a spatial carrier signal on one side of the transparent reconfigurable multifunctional metasurface, amplitude modulation communication can be performed on two receivers located in the incident half-space and the reflection half-space.

[0088] Figure 5 The embodiment shows the relationship between the transmission coefficient and frequency of a transparent reconfigurable multifunctional metasurface and a 2 mm thick ordinary flat glass at incident angles of 0°, 40°, and 80° when the bias current of the PIN tube is 1 mA. Figure 5 (a) is the case where the incident wave is a TE polarized wave. Figure 5 (b) is the case where the incident wave is TM polarized wave.

[0089] In order to measure the anti-reflection performance of a transparent reconfigurable multifunctional metasurface provided in this embodiment in a transmission-enhanced state (the bias current of the PIN tube is 1 mA), the anti-reflection performance is defined as:

[0090] Anti-reflection performance (dB) = transmittance coefficient (dB) of a 2 mm thick flat glass with a reconfigurable transparent film attached to the surface - transmittance coefficient (dB) of a 2 mm thick flat glass without a reconfigurable transparent film attached to the surface;

[0091] Figure 6The relationship between the anti-reflection performance and the incident angle of a transparent reconfigurable multifunctional metasurface provided by this embodiment at 5.25 GHz under the state of enhanced transmission is shown, as well as the relationship between the transmission coefficient and the incident angle of a 2 mm thick flat glass with a reconfigurable transparent film attached to the surface and a 2 mm thick flat glass without a reconfigurable transparent film attached to the surface at 5.25 GHz. Figure 6 (a) is the case where the incident wave is a TE polarized wave. Figure 6 (b) is the case where the incident wave is TM polarized wave.

[0092] Figure 7 The embodiment shows the relationship between the transmission coefficient and frequency of a transparent reconfigurable multifunctional metasurface and a 2 mm thick ordinary flat glass at incident angles of 0°, 40°, and 80° when the bias current of the PIN tube is 0 mA. Figure 7 (a) is the case where the incident wave is a TE polarized wave. Figure 7 (b) is the case where the incident wave is TM polarized wave.

[0093] In order to measure the shielding performance of a transparent reconfigurable multifunctional metasurface provided in this embodiment under the electromagnetic shielding state (the bias current of the PIN tube is 0 mA), the shielding performance is defined as:

[0094] Shielding performance (dB) = transmittance coefficient (dB) of a 2 mm thick flat glass without a reconfigurable transparent film attached to the surface - transmittance coefficient (dB) of a 2 mm thick flat glass with a reconfigurable transparent film attached to the surface;

[0095] Figure 8 The relationship between the shielding performance and the incident angle of a transparent reconfigurable multifunctional metasurface provided by this embodiment at 5.25 GHz under electromagnetic shielding conditions is shown, as well as the relationship between the transmission coefficient and the incident angle of a 2 mm thick flat glass with a reconfigurable transparent film attached to the surface and a 2 mm thick flat glass without a reconfigurable transparent film attached to the surface at 5.25 GHz. Figure 8 (a) is the case where the incident wave is a TE polarized wave. Figure 8 (b) is the case where the incident wave is TM polarized wave.

[0096] Fig. 9 The relationship between the transmittance and reflection coefficient and frequency of a transparent reconfigurable multifunctional metasurface provided by this embodiment under DC bias of 0mA, 1uA, 5uA, 10uA, 20uA, 50uA, 100uA, and 1mA is demonstrated under normal incidence. Fig. 9 (a) is the transmission coefficient, Fig. 9 (b) is the reflection coefficient. The transmission and reflection amplitude curves in various states can realize good dual-channel amplitude modulation communication.

[0097] It should be further noted that the unit operating frequency band provided in this embodiment is 4-6 GHz, and the center frequency is 5.25 GHz. The overall operating frequency band is in the sub-6G band. If the unit size is adjusted, its operating frequency band can be flexibly adjusted and meet the performance of good multi-functional electromagnetic control.

[0098] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0099] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A transparent reconfigurable multifunctional metasurface, characterized in that The transparent reconfigurable multifunctional metasurface comprises N×N basic units arranged periodically to form a unit array, where N is a natural number; each basic unit is controlled by the same signal, and the control signal of the entire unit array is controlled by an external circuit; The layered structure of each basic unit includes, from top to bottom: The first layer is an upper metal pattern layer (1); The second layer is an upper PET layer (2); The third layer is an upper adhesive layer (3); The fourth layer is a glass dielectric layer (4); The fifth layer is a lower adhesive layer (5); The sixth layer is a lower PET layer (6); The seventh layer is a lower metal pattern layer (7), The upper metal pattern layer (1) and the upper PET layer (2) together constitute an upper reconfigurable transparent film; the lower PET layer (6) and the lower metal pattern layer (7) together constitute a lower reconfigurable transparent film; the upper reconfigurable transparent film and the lower reconfigurable transparent film are connected to the glass medium layer (4) via an adhesive layer; The upper metal pattern layer (1) comprises two upper metal folding lines (1.3) perpendicular to each other, the four external ports of the two upper metal folding lines (1.3) being respectively located in the middle of the four sides of the upper metal pattern layer (1), and the PIN tube A (1.1) and the PIN tube B (1.2) are loaded in series on the upper metal folding lines (1.3) along the x direction; The lower metal pattern (7) layer comprises two mutually perpendicular lower metal folding lines (7.3), the four external ports of the two mutually perpendicular lower metal folding lines (7.3) are respectively located in the middle of the four sides of the lower metal pattern (7), and a PIN tube C (7.1) and a PIN tube D (7.2) are loaded in series on the lower metal folding line (7.3) along the y direction; The PIN tube A (1.1), PIN tube B (1.2), PIN tube C (7.1) and PIN tube D (7.2) are in a conducting state when the bias current is 1 mA, in a non-conducting state when the bias voltage is 0 mA, and in an intermediate state when the bias voltage is between 0 mA and 1 mA; the internal equivalent circuits of the PIN tubes in the conducting, non-conducting and intermediate states are different, thereby generating different electromagnetic responses to electromagnetic waves incident on the reconfigurable multifunctional metasurface, thereby realizing multifunctional spatial electromagnetic wave control; When the bias current of the PIN tube A (1.1), the PIN tube B (1.2), the PIN tube C (7.1) and the PIN tube D (7.2) is 0 mA, they are in a transmission enhancement state; when the bias current is 10 mA, they are in an electromagnetic shielding state; when the bias current is between 0 mA and 1 mA, they are in a dual-channel amplitude modulation communication state.

2. A transparent reconfigurable multifunctional metasurface according to claim 1, characterized in that: The dual-channel amplitude modulation communication state is that the metasurface controls the amplitude of the reflected wave and the transmitted wave generated by the incident wave. This control method is called full-space control.

3. A transparent reconfigurable multifunctional metasurface according to claim 2, characterized in that: The metasurface is suitable for wide incident angle and dual polarization application scenarios; wherein the incident angle of the incident wave is applicable in the range of 0-80°; wherein both TE polarization and TM polarization incident waves are applicable.

4. A transparent reconfigurable multifunctional metasurface according to claim 3, characterized in that: The transparent reconfigurable multifunctional metasurface maintains optical transparency in addition to having electromagnetically reconfigurable properties.

5. A transparent reconfigurable multifunctional metasurface according to claim 4, characterized in that: The first upper metal pattern layer (1) and the seventh lower metal pattern layer (7) jointly regulate the incident electromagnetic wave.

6. The transparent reconfigurable multifunctional metasurface according to claim 1, characterized in that: The folding bending angle α of the upper metal folding line or the lower metal folding line is 60°.

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