Ultra-wideband, Wide Angle and Polarization-insensitive Specular Reflection Reduction by Metasurface based on Parameteradjustable Meta-Atoms

Authors

Jianxun Su, Communication University of China
Yao Lu, Communication University of China
Hui Zhang, Communication University of China
Zengrui Li, Communication University of China
Yaoqing Lamar Yang, University of Nebraska-LincolnFollow
Yongxing Che, Science and Technology on Electromagnetic Scattering Laboratory
Kainan Qi, Science and Technology on Electromagnetic Scattering Laboratory

Date of this Version

2017

Citation

Scientific Reports, 7:42283, DOI: 10.1038/srep42283

Comments

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

In this paper, an ultra-wideband, wide angle and polarization-insensitive metasurface is designed, fabricated, and characterized for suppressing the specular electromagnetic wave reflection or backward radar cross section (RCS). Square ring structure is chosen as the basic meta-atoms. A new physical mechanism based on size adjustment of the basic meta-atoms is proposed for ultra-wideband manipulation of electromagnetic (EM) waves. Based on hybrid array pattern synthesis (APS) and particle swarm optimization (PSO) algorithm, the selection and distribution of the basic meta-atoms are optimized simultaneously to obtain the ultra-wideband diffusion scattering patterns. The metasurface can achieve an excellent RCS reduction in an ultra-wide frequency range under x- and y-polarized normal incidences. The new proposed mechanism greatly extends the bandwidth of RCS reduction. The simulation and experiment results show the metasurface can achieve ultra-wideband and polarization insensitive specular reflection reduction for both normal and wide-angle incidences. The proposed methodology opens up a new route for realizing ultra-wideband diffusion scattering of EM wave, which is important for stealth and other microwave applications in the future.