A Wideband and Polarization-Independent Metasurface Based on Phase Optimization for Monostatic and Bistatic Radar Cross Section Reduction

Authors

Jianxun Su, Communication University of China
Yao Lu, Communication University of China
Zengrui Li, Communication University of ChinaFollow
Rongrong Zhang, CommScope Telecommunications China Co. Ltd.
Yaoqing (Lamar) Yang, University of Nebraska - LincolnFollow

Date of this Version

2016

Citation

International Journal of Antennas and Propagation Volume 2016, Article ID 7595921, 9 pages

Comments

Copyright © 2016 Jianxun Su et al.

Open access

http://dx.doi.org/10.1155/2016/7595921

Abstract

A broadband and polarization-independent metasurface is analyzed and designed for both monostatic and bistatic radar cross section (RCS) reduction in this paper. Metasurfaces are composed of two types of electromagnetic band-gap (EBG) lattice, which is a subarray with “0” or “𝜋” phase responses, arranged in periodic and aperiodic fashions. A new mechanism is proposed for manipulating electromagnetic (EM) scattering and realizing the best reduction of monostatic and bistatic RCS by redirecting EM energy to more directions through controlling the wavefront of EMwave reflected from the metasurface. Scattering characteristics of two kinds of metasurfaces, periodic arrangement and optimized phase layout, are studied in detail. Optimizing phase layout through particle swarm optimization (PSO) together with far field pattern prediction can produce a lot of scattering lobes, leading to a great reduction of bistatic RCS. For the designed metasurface based on optimal phase layout, a bandwidth of more than 80% is achieved at the normal incidence for the −9.5 dB RCS reduction for both monostatic and bistatic. Bistatic RCS reduction at frequency points with exactly 180∘ phase difference reaches 17.6 dB. Both TE and TM polarizations for oblique incidence are considered. The measured results are in good agreement with the corresponding simulations.