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High-transparency diffuse reflection metasurface capable of reducing radar cross section

A radar cross-section, high transparency technology, applied in the direction of electrical components, antennas, etc.

Inactive Publication Date: 2021-05-18
WUHAN SECOND SHIP DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing aircraft stealth coatings are all non-transparent, but transparent glass parts such as aircraft cockpits, ship cockpits, and instrument dials all have stealth requirements, which has become a shortcoming of the current stealth technology

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  • High-transparency diffuse reflection metasurface capable of reducing radar cross section
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  • High-transparency diffuse reflection metasurface capable of reducing radar cross section

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Embodiment Construction

[0026] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0027] The present invention provides a highly transparent diffuse reflection metasurface that reduces the radar scattering cross section, such as Figure 1 ~ Figure 2 As shown, from bottom to top are: bottom substrate 6, ITO 5, middle layer 4, top substrate 3, and wire meshes 1 and 2 whose outer contours are circular Minkowski rings. The structural diagrams of two kinds of wire mesh (basic unit) are as follows: image 3 As shown, the metasurface is composed of two unit structures of quasi-Minkowski rings with radii of 1.7mm ("0" element) and 3.3mm ("1"element) respectively. Figure 4 The phase and amplitude full-wave simulation diagrams of the two unit structures of "0" and "1" show that the reflection amplitudes of the two units remain basically unchanged in the entire simulation frequency band, and the phase difference between the two units remains con...

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Abstract

The invention discloses a high-transparency diffuse reflection metasurface capable of reducing a radar cross section. The diffuse reflection metasurface sequentially comprises a top layer, a middle layer and a bottom layer from top to bottom, wherein the bottom layer is ITO; the middle layer is an optical transparent dielectric layer; the top layer is a metal net with two outer contours which are circular Minkowski rings; and two kinds of circular Minkowski ring metal nets are used as basic units, the amplitudes of the two kinds of basic units are approximately equal in the working frequency band range, and the phase difference is 180 degrees + / -30 degrees. The phase of one basic unit can be classified as 0 degree and is called as a 0 element; and the phase of the other one can be classified as 180 degrees and is called as an element 1. The two basic units have the characteristics of self-similarity and polarization insensitivity. The diffuse reflection metasurface is high in light transmittance and easy to implement, and has the function of obviously reducing backward RCS in a wide frequency range.

Description

technical field [0001] The invention relates to the technical field of artificial electromagnetic materials, in particular to a high-transparency diffuse reflection metasurface that reduces the radar scattering cross section. Background technique [0002] With the continuous development of radar and air defense technology, military detection technology and stealth technology mature rapidly, and the stealth performance of the target has become a key factor to improve its survivability and penetration ability. In recent years, many methods to reduce RCS have been proposed. Electromagnetic metamaterials, as a kind of man-made composite materials, provide many new ideas for electromagnetic stealth technology. By designing different structural units, electromagnetic metamaterials can flexibly adjust the state of electromagnetic waves to achieve specific functions, such as phase gradient metasurfaces (PGM) with unusual reflection and refraction effects, and metamaterials that red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 黄双魏雅琪陈源宝谢刚赵雨桐陈佳陈建忠
Owner WUHAN SECOND SHIP DESIGN & RES INST
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