Bi-functional meta-material for vortex beam generating with low RCS characteristics. (February 2019)

• Record Type: Journal Article
• Authors: Guo, W L; Wang, G M; Liu, K Y; Zhuang, Y Q; Ran, Y Z
• Is Part Of: IOP conference series. Volume 479(2019)
• Publication Date: 2019-02
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/479/1/012028
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: 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.