Ultra-thin ultra-wideband checkerboard structure RCS reduction metasurface

Abstract

The invention belongs to the field of novel artificial electromagnetic materials, and particularly relates to an ultra-thin ultra-wideband checkerboard structure RCS reduction metasurface. Based on anartificial magnetic conductor AMC structure, through the design of top layer metal patterns of two super-surface basic unit composite structures and further selection of materials and sizes, basic units 0 and 1 are arranged in an array to form super units 0 and 1, and then the two super units are designed and obtained according to a chessboard structure. In the 8-12GHz wave band, the phase difference can meet the RCS reduction requirement in a wide frequency band, and the ultra-wideband antenna is suitable for a high-temperature environment. The metasurface thickness is small, the medium thickness is 2.3 mm, and the overall metasurface thickness is 2.37 mm and is reduced by 0.7 mm compared with the prior art; the ultra-wideband band-pass filter has the advantages that the ultra-wideband band-pass filter is wide in frequency band and good in reduction effect, the bandwidth of more than 10dB can reach 3GHz, the relative bandwidth can reach 26.9%, and the maximum RCS reduction value is 25dB when the ultra-wideband band-pass filter works at 8-12GHz; the technical problems that the thickness of the metasurface is reduced while the bandwidth of the metasurface is guaranteed and the metasurface can be applied to a high-temperature environment are solved.

Description

technical field [0001] The invention belongs to the field of novel artificial electromagnetic materials, in particular to an ultra-thin and ultra-broadband checkerboard structure RCS (Radar Cross Section, Radar Cross Section) reduced metasurface. Background technique [0002] A metasurface is an artificial composite structure formed according to a certain arrangement. Different from traditional materials that exist in nature, metasurfaces can regulate the electromagnetic parameters of the material itself by adjusting the parameters of the structure. The main principle is to change the propagation properties of electromagnetic waves by introducing phase mutations. [0003] Since the metasurface only considers two dimensions, the metasurface has the characteristics of thin thickness and light weight. In addition, the design of the metasurface is relatively flexible and can adjust the frequency band of action. By adjusting the metasurface material and size structure, the worki...

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Problems solved by technology

[0006] In view of the above-mentioned problems or deficiencies, in order to solve the technical problems that the existing metasurface can reduce the thickness of the metasurface while ensuring the bandwidth and can be applied to high-temperature environments; the present invention provides an ultra-thin and ultra-broadband checkerboard structure RCS reduced metasurface , based on ZrO 2 Consider designing two kinds of AMC structures for compounding, so as to broaden the effective bandwidth. According to the principle of phase cancellation, design a new metasurface pattern, so that the phase difference of the basic units of the two metasurfaces satisfies 180°±37° at 8-12GHz, so that Achieve RCS reduction of more than 10dB with a relative bandwidth of 26.9%, and is suitable for high temperature environments

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