Optically transparent electromagnetic metasurface for broadband and wide-angle RCS reduction

Abstract

The invention discloses an optically transparent electromagnetic metasurface for broadband and wide-angle RCS reduction, which is composed of three indium tin oxide (ITO) thin film layers and two polyethylene glycol terephthalate (PET) dielectric layers, wherein the surface ITO layer and the middle ITO layer are respectively composed of N * N metasurface modules arranged in a chessboard mode; each metasurface module is composed of M * M basic units, every two adjacent metasurface modules are distributed in a clockwise rotating mode along the center, the upper ITO layer is composed of a set of L-shaped patches arranged along the diagonal line, and the middle ITO layer is composed of a set of L-shaped patches arranged along the diagonal line and a set of arched strips. The optically transparent electromagnetic metasurface further comprises a bottom ITO layer reflecting plate. The problem that compatibility of RCS reduction and optical transparency is difficult to achieve in the prior art is solved. The optically transparent electromagnetic metasurface has the advantages of being good in broadband and wide-angle RCS reduction performance, optical transparency and the like and has potential application in scenes needing optical transparency or perspective observation and RCS reduction at the same time.

Description

technical field [0001] The invention belongs to the field of novel artificial electromagnetic materials, and relates to an electromagnetic metasurface, in particular to an optically transparent electromagnetic metasurface for broadband and wide-angle RCS reduction. Background technique [0002] The continuous development of modern radar detection technology poses a serious threat to low-scattering platforms. Existing scattering suppression technologies include shape design and coating of radar absorbing materials. Suppressing scattering through shape technology usually changes the original morphological characteristics of the platform and destroys its aerodynamic performance, and has defects such as narrow scattering bandwidth and poor angular stability. Although the scattering intensity can be effectively reduced by coating radar absorbing materials, its application scenarios are limited due to various factors such as volume and weight. In addition, for scenes that have b...

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Problems solved by technology

[0006] In order to solve the above-mentioned defects existing in the prior art, the object of the present invention is to propose a wide-band and wide-angle RCS reduction technology for the problem that the existing scattering suppression technology cannot satisfy the scene with optical transparency or visual observation and scattering suppression requirements at the same time. The optically transparent electromagnetic metasurface is used to meet the needs of optical transparency or visual observation in special scenarios such as platform windows while achieving broadband and wide-angle RCS reduction in existing technologies

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