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

Document Type

Article

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.