Ultra-wideband, Wide Angle and Polarization-insensitive Specular Reflection Reduction by Metasurface based on Parameter-adjustable Meta-Atoms.
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.
College of Information Engineering, Communication University of China, Beijing 100024, China.
Jianxun
J
Su
College of Information Engineering, Communication University of China, Beijing 100024, China.
Yao
Y
Lu
College of Information Engineering, Communication University of China, Beijing 100024, China.
Hui
H
Zhang
College of Information Engineering, Communication University of China, Beijing 100024, China.
Zengrui
Z
Li
Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, NE, 68182, USA.
Yaoqing
Y
Lamar Yang
Science and Technology on Electromagnetic Scattering Laboratory, Beijing, 100854, China.
Yongxing
Y
Che
Science and Technology on Electromagnetic Scattering Laboratory, Beijing, 100854, China.
Kainan
K
Qi