Bi-functional meta-material for vortex beam generating with low RCS characteristics

3rd International Conference on New Material and Chemical Industry

材料科学;化学工业

Guo, W.L.^1 ; Wang, G.M.^1 ; Liu, K.Y.^1 ; Zhuang, Y.Q.^1 ; Ran, Y.Z.^1

Air and Missile Defence College, Air Force Engineering University, Xi'an, China^1

关键词: Broad bandwidths;    Dependent functions;    Different sizes;    ITS applications;    Rcs reductions;    Reflection phasis;    Simulated results;    X polarizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/479/1/012028/pdf
DOI  :  10.1088/1757-899X/479/1/012028

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Meta-material has been proved to be an effective method to manipulate wave ranging from microwave to optic spectrum. Here, we employ a metasurface, namely two-dimensional equivalent of meta-material, to design a vortex beam generator with low radar cross section (RCS) characteristic. An anisotropic meta-atom is firstly optimized to control reflection phases independently for orthogonally polarized waves in a broad bandwidth. Then various meta-atoms with different sizes are assembled into a whole prototype, which is not only capable of reducing the backward RCS for x-polarization but also generating vortex beam for y-polarization. Simulated results further verify the theoretical prediction, indicating polarization-dependent functions for orthogonally polarized waves. This bi-functional metasurface and its application for vortex beam generating and RCS reduction may promote the application of artificial electromagnetic meta-material.