A Novel Checkerboard Metasurface Based on Optimized Multielement Phase Cancellation for Superwideband RCS Reduction
A Novel Checkerboard Metasurface Based on Optimized Multielement Phase Cancellation for Superwideband RCS Reduction
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DOI：
10.1109/tap.2018.2870372
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发表时间：
2018-12-01
影响因子：
5.7
通讯作者：
Song, Jiming
中科院分区：
文献类型：
--
作者：
Su, Jianxun;Lu, Yao;Song, Jiming
本文提出了一种基于优化多元相位相消的棋盘形超元表面，以极大地扩展雷达散射截面（RCS）减缩的带宽。更基本的元器件，特别是它们之间的可变相位差，大大增加了控制电磁波的能力。在超宽频带中采样的多个频率下由基本元粒子产生的多个局部波之间的相互作用被同时操纵和优化以实现相位抵消。在5.5 ~ 32.3GHz的超宽带范围内，该超颖表面在两种极化方向垂直入射时的带宽比（f（H）/f（L））为5.87：1，RCS降低了10 dB。此外，RCS的减少是大于8分贝从5.4到40 GHz的7.4：1的比带宽。该超颖表面在大角度斜入射下也具有良好的性能。找到了最佳元粒子分布以实现超宽带双站RCS减缩。理论分析、仿真和实验结果吻合良好，验证了所提出的机制的能力和性能。
In this paper, a checkerboard metasurface based on a novel physical mechanism, optimized multielement phase cancellation, is proposed for greatly expanding the bandwidth of radar cross section (RCS) reduction. More basic metaparticles and, in particular, the variable phase difference between them, greatly increase the ability to control electromagnetic waves. Interactions between multiple local waves produced by the basic metaparticles at multiple frequencies sampled in a superwide frequency band are manipulated and optimized simultaneously to achieve phase cancellation. The proposed metasurface can achieve a 10 dB RCS reduction in a superwide frequency band from 5.5 to 32.3 GHz with a ratio bandwidth (f(H)/f(L)) of 5.87:1 under normal incidence for both polarizations. Furthermore, the RCS reduction is larger than 8 dB from 5.4 to 40 GHz with a ratio bandwidth of 7.4:1. The metasurface also has a good performance under wide-angle oblique incidences. The optimal metaparticle distribution is found to obtain the superwideband bistatic RCS reduction. The theoretical analysis, simulation, and experimental results are in good agreement and verify the ability and capability of the proposed mechanism.