Circularly Polarized Spin‐Selectivity Absorbing Coding Phase Gradient Metasurface for RCS Reduction,Advanced Theory and Simulations

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Circularly Polarized Spin‐Selectivity Absorbing Coding Phase Gradient Metasurface for RCS Reduction
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2020-01-27 , DOI: 10.1002/adts.201900217
Maochang Feng ₁ , Xiaoli Chen ₁ , Yongfeng Li ₁ , Qiqi Zheng ₁ , Yajuan Han _{1,

2} , Jieqiu Zhang ₁ , Jiafu Wang ₁ , Yi Hou ₃ , Zhewei Liu ₄ , Xuojian Li ₄ , Chao Wang ₁ , Jao Jing ₁ , Hua Ma ₁ , Shaobo Qu ₁

Affiliation

A novel spin‐selectivity absorbing coding phase gradient metasurface (SACPGM) is proposed and demonstrated. The coding element consists of spin‐selectivity absorbing unit cells, which exhibit different absorption characteristics for left‐handed circularly polarized and right‐handed circularly polarized incidence wave due to their spin‐selectivity absorbing properties. The scattering patterns of the SACPGM can be synthetically manipulated by the reflection of the spin‐selectivity absorbing unit cells, the phase gradient of the coding elements, and the coding sequences. As an example, a two‐bit SACPGM with random coding sequence is designed to reduce radar cross section (RCS) by a combination of absorption, beam deflection, surface wave coupling, and diffusion scattering. Both simulated and measured results agree well and demonstrate that the SACPGMs possess excellent performance for RCS reduction. This strategy can help realize stealth applications under bi‐static detections.

中文翻译：

圆极化自旋选择性吸收编码相梯度超颖表面，用于RCS还原

提出并证明了一种新型的自旋选择性吸收编码相梯度超表面（SACPGM）。编码元件由自旋选择性吸收单位细胞组成，由于其自旋选择性吸收特性，它们对左旋圆偏振和右旋圆偏振入射波表现出不同的吸收特性。SACPGM的散射模式可以通过自旋选择性吸收晶胞的反射，编码元素的相位梯度和编码序列进行综合控制。例如，具有随机编码序列的两位SACPGM被设计为通过吸收，束偏转，表面波耦合和扩散散射的组合来减小雷达截面（RCS）。模拟和测量结果均吻合良好，并表明SACPGM具有降低RCS的出色性能。该策略可以帮助在双静态检测下实现隐身应用。

更新日期：2020-03-04

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