Bi-functional metasurface controlling electromagnetic wave scattering of differently polarized wave

2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT) Pub Date : 1900-01-01 DOI:10.1109/IWAT.2017.7915376

Li Cui, Ke Chen, Yijun Feng

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Abstract

We proposed an anisotropic metasurface performing different scattering properties depending on the polarization of the incident electromagnetic wave. The proposed metasurface is composed of orthogonally I-shaped structures with a thickness of only 0.067 working wavelength, and the reflection phase for certain linearly polarized incidence can be independently controlled by tuning the corresponding geometric parameters. Based on this principle we designed a bi-functional metasurface for differently polarized wave. It can behave as a phase-compensation planar reflector to transform the primary out-phase radiation from an x-polarized feeding antenna into a secondary planar wavefront with high directivity reaching 22 dBi. On the other hand, it behaves as a diffuse reflector composed of randomly distributed reflection phases to suppress the backward radar cross section in a broad band (8.2 GHz–12.5 GHz) under the illumination of y-polarized incident wave.

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双功能超表面控制不同极化波的电磁波散射

我们提出了一种各向异性超表面，根据入射电磁波的极化表现出不同的散射特性。该超表面由正交i形结构组成，厚度仅为0.067工作波长，并且可以通过调整相应的几何参数独立控制某些线偏振入射的反射相位。基于这一原理，我们设计了一个双功能的不同极化波超表面。它可以作为相位补偿平面反射器，将x极化馈电天线的一次外相辐射转换为二次平面波前，具有高达22 dBi的高指向性。另一方面，在y偏振入射波的照射下，它作为一个由随机分布的反射相位组成的漫反射器来抑制宽带(8.2 GHz - 12.5 GHz)内的后向雷达横截面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2017 International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT)

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