Design of a Wide-Angle and Polarization-Free 1-Bit Programmable Metasurface

被引:1
作者
Liu, Lu [1 ]
Huang, Yi Fei [2 ]
Zhang, Hao Chi [2 ]
机构
[1] Jimei Univ, Sch Ocean Informat Engn, Xiamen, Peoples R China
[2] Southeast Univ, State Key Lab Millimeter Waves, Nanjing, Peoples R China
基金
中国国家自然科学基金;
关键词
wide-angle; polarization-free; programmable metasurface; receiving antenna; 1-bit;
D O I
10.3389/fmats.2022.933163
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Programmable metasurfaces have the powerful capability of controlling electromagnetic (EM) waves by coding the digital state of each meta-atom. However, conventional programmable metasurface units are difficult to maintain stable controllability under wide-angle incidence conditions, which limits the application of 1-bit programmable metasurfaces in single-beam scanning. A 1-bit dual-polarized programmable metasurface that allows oblique incidence at large angles is presented in this article. Inspired by the principle of reciprocity in the antenna theory, a wide-angle patch antenna which operates in the receiving mode and is loaded by a PIN-diode-based load circuit is designed as the basic structure of the meta-atom. Numerical simulations show that the 1-bit coding state maintains good angular stability within +/- 70 degrees of the incident angle for both orthogonally polarized EM waves, and single-beam scanning can be achieved at large oblique incident angles for any polarization.
引用
收藏
页数:6
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