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A checkerboard metasurface for ultra-wideband radar cross section reduction

机译：减少超宽带雷达横截面的棋盘超表面

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摘要

In this paper, a checkerboard metasurface is designed and characterized for ultra-wideband radar cross section (RCS) reduction. The metasurface is formed of two kinds of elements with different configuration. By appropriately selecting the sizes of basic unit cells which based on minkowski ring patch and square ring patch respectively, a 180°±37° reflection phase difference between two unit cells is obtained over 8.1-22.7 GHz (94.8% bandwidth). The metasurface based on the two unit cells is capable of altering the direction of the fields scattered by a target to four main directions deviating from normal direction, resulting in an ultra-wide frequency band RCS reduction. The 7.5 dB RCS reduction is obtained over 8.6 GHz-22.9 GHz (94.5% bandwidth) by comparing to an equal-sized perfect electric conductor (PEC) surface. Full-wave simulations of monostatic RCSs of the metasurface and the equal-sized PEC surface verify the characteristic.
机译：本文针对超宽带雷达横截面（RCS）的减少而设计了棋盘超表面，并对其进行了表征。超表面由具有不同构型的两种元素形成。通过适当地选择分别基于minkowski环形补丁和方形环形补丁的基本单位单元的大小，可以在8.1-22.7 GHz（94.8％的带宽）上获得两个单位单元之间的180°±37°反射相位差。基于两个单位晶胞的超颖表面能够将目标散射的场的方向更改为偏离法线方向的四个主要方向，从而降低了超宽频带的RCS。与同等大小的完美电导体（PEC）表面相比，在8.6 GHz至22.9 GHz（94.5％的带宽）上可获得7.5 dB的RCS降低。对超表面和等尺寸PEC表面的单静态RCS进行全波仿真，验证了这一特性。

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