Broadband wide-angle polarization-independent diffusion using parabolic-phase metasurface
| Autor: | He-Xiu Xu, Shaojie Ma, Xiaohui Ling, Lei Zhou, Xiao-Kuan Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Scattering business.industry Bandwidth (signal processing) Electromagnetic compatibility Regular polygon 020206 networking & telecommunications 02 engineering and technology Polarization (waves) 01 natural sciences Azimuth Bistatic radar Optics 0103 physical sciences Broadband 0202 electrical engineering electronic engineering information engineering 010306 general physics business |
| Zdroj: | 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (EMC/APEMC). |
| Popis: | Parabolic-phased profile was commonly utilized for concave or convex metalens. Here, we report for the first time using such approach for determinant and polarization-independent diffusion of scattering waves in broadband and wide incident angles by engineering parabolic-phased subarrays in coding sequences. For verification, a 1-bit metasurface is designed, across C, X, and Ku bands. Theoretical, numerical and experimental results demonstrate that our approach is very powerful in distributing the scattering energy more uniformly than available approach using non-gradient subarrays. The −7.5 dB fractional bandwidth is obtained as 88% and the diffuse scattering behavior can be preserved up to 60o off normal incidence irrespective of polarizations. Our approach, simple and free of time-consuming optimizations, paves the way for electromagnetic compatibility and stealth applications under bistatic detection. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|