Array combined type wave absorber based on broadband electromagnetic metamaterial

Abstract

The utility model discloses an array combined type wave absorber based on a broadband electromagnetic metamaterial, which comprises a metal substrate, suckers are distributed at the bottom of the metal substrate at equal intervals, the inner side of the metal substrate is of a hollow structure, and a flow channel is formed in the inner side of the metal substrate; the upper end of the metal substrate is connected with a high-refractive-index dielectric layer, the upper end of the high-refractive-index dielectric layer is connected with an absorption layer, the upper end of the absorption layer is connected with a reflection layer, the upper end of the reflection layer is connected with a thin film layer, and the upper end of the thin film layer is connected with a metasurface array structure. According to the array combined type wave absorber based on the broadband electromagnetic metamaterial, a multi-order hybrid waveguide mode is formed between the array combined type #-shaped conductive gold blocks and the mixed dielectric layer, light absorption is inhibited, the array combined type #-shaped conductive gold blocks can absorb electromagnetic waves in a broadband range, the reflectivity of the electromagnetic waves is reduced, and the wave absorption efficiency is improved. And the material is combined with a metasurface array structure material, so that a very good absorption effect can be achieved at low frequency.

Description

Technical Field

[0001] The utility model relates to the technical field of wave absorbers, in particular to an array-combined wave absorber based on broadband electromagnetic metamaterials. Background Art

[0002] An absorber is a physical device with isolation, suppression, and buffering functions. Its core principle is to use the "gaps" with weaker conductivity in the material to polarize electromagnetic waves, so that the energy of the waves is weakened through selective reflection or transmission, thereby absorbing incoming waves and reducing reflected outgoing waves and their corresponding interference. The array-combined absorber based on broadband electromagnetic metamaterials is an advanced electromagnetic wave absorption device that combines the characteristics of metamaterials with the design of array combinations to achieve efficient electromagnetic wave absorption within a wide frequency range.

[0003] The application number is CN201711121388.0, which is a terahertz dual-band absorber based on a cross-shaped graphene material, comprising a metal reflection layer, a dielectric layer and a pattern layer arranged in sequence from bottom to top, wherein the pattern layer is composed of periodically arranged cross-shaped material structural units, each of which is composed of mutually perpendicular horizontal bands and vertical bands connected, and the horizontal bands and vertical bands are both made of graphene, and the lattice period d of the cross-shaped material structural unit is 3-5μm, and the width a of each horizontal band and vertical band is 0.6-1μm and the length b is 1.2-2μm. At the same time, its application is provided. The absorber graphic structure of the present invention is simple, does not require multi-layer material stacking and multiple resonators, is easy to integrate, has good stability, has a special electromagnetic response, and has the characteristics of high absorptivity, high sensitivity and flexible regulation.

[0004] The absorber of the device has a simple graphic structure, does not require multi-layer material stacking and multiple resonators, is easy to integrate, has good stability, has a special electromagnetic response, and has the characteristics of high absorption rate, high sensitivity and flexible regulation. By adjusting different graphene Fermi energies, the position of the absorption peak can be controlled, and the position and absorption intensity of the absorption peak do not change with the change of the polarization direction of the incident light. However, the device uses a "cross" mechanism, and the gap is too large when in use. The terahertz wave absorption center frequency is not easy to control, and the material used for the cross-shaped material structure is graphene material, which is more troublesome to process and will increase the production cost of the enterprise.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original absorber structure. Utility Model Content

[0006] The purpose of the utility model is to provide an array combined absorber based on broadband electromagnetic metamaterials, so as to solve the problem proposed in the above background technology that the device adopts a "cross" mechanism, the gap is too large when in use, and the terahertz wave absorption center frequency is difficult to control, and the material selected for the cross material structure is graphene material, which is more troublesome to process and will increase the production cost of the enterprise.

[0007] To achieve the above object, the utility model provides the following technical solution: an array combined absorber based on broadband electromagnetic metamaterials, comprising a metal substrate, and suction cups are evenly distributed at the bottom of the metal substrate, the inner side of the metal substrate is a hollow structure, and a flow channel is opened on the inner side of the metal substrate;

[0008] It also includes: the upper end of the metal substrate is connected to a high refractive index medium layer, and the upper end of the high refractive index medium layer is connected to an absorption layer, the upper end of the absorption layer is connected to a reflection layer, and the upper end of the reflection layer is connected to a thin film layer, the upper end of the thin film layer is connected to a super surface array structure, and a conductive gold block is installed on the outside of the super surface array structure.

[0009] Preferably, the material used for the metal substrate is a noble metal substrate.

[0010] Preferably, the reflective layer is a carbon fiber cloth layer.

[0011] Preferably, the supersurface array structure is arranged in an array on the upper surface of the thin film layer, and the supersurface array structure and the thin film layer realize an irreversible bonding structure through silicon-oxygen bonds; this structure can prevent the supersurface array structure from detaching from the upper end of the thin film layer.

[0012] Preferably, the conductive gold block is a "well"-shaped structure when viewed from above, and a mixed medium layer is sprayed on the outer side of the conductive gold block.

[0013] Preferably, a servo motor is fixedly installed on the outside of the metal substrate, and a threaded rod is fixedly installed on the output end of the servo motor. A threaded connector is threadedly connected to the outside of the threaded rod, and a connecting frame is fixedly connected to the outside of the threaded connector, and an anti-static brush is fixedly installed on the inside of the connecting frame, and the anti-static brush and the metasurface array structure are distributed in correspondence with each other up and down; this structure can drive the threaded connector to move left and right through the rotation of the threaded rod, and the left and right movement of the threaded connector can drive the anti-static brush to clean the upper end of the thin film layer.

[0014] Preferably, a sliding block is fixedly installed on the outside of the threaded connector, and the sliding block is nested inside the sliding track, and the sliding track is fixedly installed on the outer surface of the metal substrate; this structure can limit the angle of the threaded connector by sliding the sliding block inside the sliding track.

[0015] Compared with the prior art, the beneficial effect of the utility model is that the array combined absorber based on broadband electromagnetic metamaterial is provided with:

[0016] 1. Wave-absorbing structure. This structure forms a multi-order hybrid waveguide mode between the array-combined tic-tac-toe conductive gold blocks and the mixed dielectric layer to suppress the absorption of light. The array-combined tic-tac-toe conductive gold blocks can absorb electromagnetic waves in a wide frequency range and reduce the reflectivity of electromagnetic waves. Combining it with the metasurface array structure material can play a good absorption role at low frequencies (0.5-2GHz);

[0017] Furthermore, the metasurface array structure and the thin film layer realize an irreversible bonding structure through a silicon-oxygen bond, which can prevent the metasurface array structure from detaching from the upper end of the thin film layer, and the thin film layer can provide waterproof protection for the inner reflective layer, absorption layer, and high refractive index medium layer;

[0018] Furthermore, the incident electromagnetic wave enters the absorption layer after being filtered by the high refractive index medium layer, a part of the incident electromagnetic wave is absorbed by the absorption layer, and the other part of the electromagnetic wave that is not absorbed enters the reflection layer, is reflected by the reflection layer, and the reflected electromagnetic wave is absorbed by the absorption layer, so that the incoming filter is repeatedly absorbed by the cooperation between the absorption layer and the reflection layer, thereby improving the filtering effect;

[0019] 2. Cleaning structure: This structure drives the threaded rod to rotate through the operation of the servo motor. The rotation of the threaded rod drives the threaded connector connected to the outer thread to move left and right. The left and right movement of the threaded connector drives the anti-static brush on the inner side of the connecting frame to move left and right to clean the upper end of the film layer, thereby improving the filtering effect of the absorber;

[0020] Furthermore, when the threaded connector moves left and right, the sliding block on the outside thereof will also slide along the inside of the sliding track, and the sliding block sliding on the inside of the sliding track can limit the angle of the threaded connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the utility model when viewed from above;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the metal substrate of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the thin film layer of the utility model;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the threaded rod of the utility model;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the sliding track of the utility model;

[0027] Figure 7 The figure is a schematic diagram of the three-dimensional structure of the anti-static brush of the utility model.

[0028] In the figure: 1. Metal substrate; 2. Suction cup; 3. Flow channel; 4. High refractive index medium layer; 5. Absorption layer; 6. Reflection layer; 7. Thin film layer; 8. Metasurface array structure; 9. Conductive gold block; 10. Servo motor; 11. Threaded rod; 12. Threaded connector; 13. Sliding block; 14. Sliding track; 15. Connecting frame; 16. Anti-static brush. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The utility model provides the following technical solutions:

[0031] Embodiment 1: Figure 1-Figure 4 The technical solution shown: an array combined absorber based on broadband electromagnetic metamaterials, discloses: a metal substrate 1, and suction cups 2 are evenly distributed at the bottom of the metal substrate 1, the inner side of the metal substrate 1 is a hollow structure, and a flow channel 3 is opened inside the metal substrate 1;

[0032] It also includes: a high refractive index medium layer 4 is connected to the upper end of the metal substrate 1, and an absorption layer 5 is connected to the upper end of the high refractive index medium layer 4, a reflection layer 6 is connected to the upper end of the absorption layer 5, and a thin film layer 7 is connected to the upper end of the reflection layer 6, a super surface array structure 8 is connected to the upper end of the thin film layer 7, and a conductive gold block 9 is installed on the outer side of the super surface array structure 8;

[0033] The material used for the metal substrate 1 is a noble metal substrate; the reflective layer 6 is a carbon fiber cloth layer; the super surface array structure 8 is arranged in an array on the upper surface of the thin film layer 7, and the super surface array structure 8 and the thin film layer 7 realize an irreversible bonding structure through a silicon-oxygen bond; the conductive gold block 9 is a "well"-shaped structure when viewed from above, and a mixed medium layer is sprayed on the outer side of the conductive gold block 9;

[0034] This structure forms a multi-order hybrid waveguide mode between the array-combined tic-tac-toe conductive gold blocks 9 and the mixed dielectric layer to suppress the absorption of light. The array-combined tic-tac-toe conductive gold blocks 9 can absorb electromagnetic waves in a wide frequency range and reduce the reflectivity of electromagnetic waves. Combining it with the metasurface array structure 8 material can play a good absorption role at low frequencies (0.5-2GHz), and the metasurface array structure 8 and the thin film layer 7 realize an irreversible bonding structure through silicon-oxygen bonds, which can prevent the metasurface array structure 8 from detaching from the upper end of the thin film layer 7, and the thin film layer 7 can provide waterproof protection for the inner reflection layer 6, the absorption layer 5, and the high refractive index dielectric layer 4. The incident electromagnetic wave enters the absorption layer 5 after being filtered by the high refractive index dielectric layer 4, and a part of the incident electromagnetic wave is absorbed by the absorption layer 5, and the other part of the electromagnetic wave that is not absorbed enters the reflection layer 6, and is reflected by the reflection layer 6. The reflected electromagnetic wave is absorbed by the absorption layer 5, so that the incoming filter is repeatedly absorbed by the mutual cooperation of the absorption layer 5 and the reflection layer 6, thereby improving the filtering effect.

[0035] Embodiment 2 is different from Embodiment 1 in that a cleaning structure is added on the basis of filtering, such as Figure 1-Figure 2 , Figure 5 , Figure 7 The figure discloses: a servo motor 10 is fixedly mounted on the outer side of the metal substrate 1, a threaded rod 11 is fixedly mounted on the output end of the servo motor 10, a threaded connector 12 is threadedly connected to the outer side of the threaded rod 11, and a connecting frame 15 is fixedly connected to the outer side of the threaded connector 12, a static-eliminating brush 16 is fixedly mounted on the inner side of the connecting frame 15, and the static-eliminating brush 16 is distributed correspondingly to the metasurface array structure 8 up and down;

[0036] This structure drives the threaded rod 11 to rotate through the operation of the servo motor 10. The rotation of the threaded rod 11 drives the threaded connector 12 connected to the outer thread to move left and right. The left and right movement of the threaded connector 12 drives the anti-static brush 16 on the inner side of the connecting frame 15 to move left and right to clean the upper end of the thin film layer 7, thereby improving the filtering effect of the absorber.

[0037] Embodiment 3 is different from Embodiment 2 in that an angle limiting structure is added on the basis of cleaning, such as Figure 1-Figure 2 , Figure 5-Figure 6 It is disclosed as follows: a sliding block 13 is fixedly installed on the outer side of the threaded connector 12, and the sliding block 13 is nested inside the sliding track 14, and the sliding track 14 is fixedly installed on the outer surface of the metal substrate 1;

[0038] When the threaded connector 12 of this structure moves left and right, the sliding block 13 on the outside thereof will also slide along the inside of the sliding track 14 , and the threaded connector 12 is angle-limited by the sliding of the sliding block 13 on the inside of the sliding track 14 .

[0039] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An array-combined absorber based on broadband electromagnetic metamaterials, comprising a metal substrate (1), wherein suction cups (2) are evenly distributed at the bottom of the metal substrate (1), the inner side of the metal substrate (1) is a hollow structure, and a flow channel (3) is opened on the inner side of the metal substrate (1); Features: Also includes: The upper end of the metal substrate (1) is connected to a high refractive index medium layer (4), and the upper end of the high refractive index medium layer (4) is connected to an absorption layer (5), the upper end of the absorption layer (5) is connected to a reflection layer (6), and the upper end of the reflection layer (6) is connected to a thin film layer (7), the upper end of the thin film layer (7) is connected to a super surface array structure (8), and a conductive gold block (9) is installed outside the super surface array structure (8).

2. The array-combined absorber based on broadband electromagnetic metamaterials according to claim 1, characterized in that: The material used for the metal substrate (1) is a noble metal substrate.

3. The array-combined absorber based on broadband electromagnetic metamaterials according to claim 1, characterized in that: The reflective layer (6) is a carbon fiber cloth layer.

4. The array-combined absorber based on broadband electromagnetic metamaterials according to claim 1, characterized in that: The super surface array structure (8) is arranged in an array on the upper surface of the thin film layer (7), and the super surface array structure (8) and the thin film layer (7) realize an irreversible bonding structure through silicon-oxygen bonds.

5. The array-combined absorber based on broadband electromagnetic metamaterials according to claim 1, characterized in that: The conductive gold block (9) has a "well"-shaped structure when viewed from above, and a mixed medium layer is sprayed on the outer side of the conductive gold block (9).

6. The array-combined absorber based on broadband electromagnetic metamaterials according to claim 1, characterized in that: A servo motor (10) is fixedly mounted on the outside of the metal substrate (1), a threaded rod (11) is fixedly mounted on the output end of the servo motor (10), a threaded connector (12) is threadedly connected to the outside of the threaded rod (11), and a connecting frame (15) is fixedly connected to the outside of the threaded connector (12), and a static-eliminating brush (16) is fixedly mounted on the inside of the connecting frame (15), and the static-eliminating brush (16) and the metasurface array structure (8) are distributed in a corresponding manner up and down.

7. The array-combined absorber based on broadband electromagnetic metamaterials according to claim 6, characterized in that: A sliding block (13) is fixedly mounted on the outside of the threaded connector (12), and the sliding block (13) is nested inside a sliding track (14), and the sliding track (14) is fixedly mounted on the outer surface of the metal substrate (1).

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