1. Random Combinatorial Gradient Metasurface for Broadband, Wide-Angle and Polarization-Independent Diffusion Scattering
- Author
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Xiao-Lan Tang, Tongfeng Guo, Yaqiang Zhuang, Guang-Ming Wang, Qingfeng Zhang, Tong Cai, and Jiangang Liang
- Subjects
Physics ,Radar cross-section ,Multidisciplinary ,business.industry ,Scattering ,lcsh:R ,lcsh:Medicine ,020206 networking & telecommunications ,02 engineering and technology ,Phase bandwidth ,021001 nanoscience & nanotechnology ,Polarization (waves) ,Article ,Optics ,Broadband ,0202 electrical engineering, electronic engineering, information engineering ,lcsh:Q ,Specular reflection ,0210 nano-technology ,business ,lcsh:Science - Abstract
This paper proposes an easy, efficient strategy for designing broadband, wide-angle and polarization-independent diffusion metasurface for radar cross section (RCS) reduction. A dual-resonance unit cell, composed of a cross wire and cross loop (CWCL), is employed to enhance the phase bandwidth covering the 2π range. Both oblique-gradient and horizontal-gradient phase supercells are designed for illustration. The numerical results agree well with the theoretical ones. To significantly reduce backward scattering, the random combinatorial gradient metasurface (RCGM) is subsequently constructed by collecting eight supercells with randomly distributed gradient directions. The proposed metasurface features an enhanced specular RCS reduction performance and less design complexity compared to other candidates. Both simulated and measured results show that the proposed RCGM can significantly suppress RCS and exhibits broadband, wide-angle and polarization independence features.
- Published
- 2017