航空科学技术2024，Vol.35Issue(4)：60-66,7.DOI:10.19452/j.issn1007-5453.2024.04.008
一种基于相位梯度原理的反射型电磁超表面及RCS缩减应用
A Reflective Electromagnetic Metasurface Based on Phase Gradient Principle and RCS Reduction Application
摘要
Abstract
For electromagnetic beamforming and electromagnetic stealth issues,a reflective phase gradient metasurface in the form of cross slits on a circular patch is designed,and the differential reflective phase coverage is achieved by adjusting the cell size.Metasurface acts in the X-band and arranges the metasurface units in a linear,equal-phase difference format to deflect the maximum scattering direction of the reflected wave out of the angular field of interest.By adjusting the value of the phase gradient,the maximum scattering direction can be precisely controlled to reduce monostatic backscattering while taking into account the reduction of bistatic scattering in the angle of interest domain.The unit structure is symmetrically designed with polarization-insensitive characteristics.Based on this phase gradient metasurface,the 1D and 2D phase gradient metasurface arrays are designed.The peak RCS of the 1D array structure is reduced by 41.13dB,the mean value is reduced by 8.7dB,and the maximum scattering direction is deflected by 16.5°;the peak RCS of the 2D array structure is reduced by 16.29dB,the mean value is reduced by 9.04dB,and the maximum scattering direction is phi=135°,theta=23°.1D and 2D arrangement forms achieve monostatic and bistatic radar stealth effect.关键词
左手材料/电磁超表面/相位梯度超表面/雷达截面积/斯涅尔定理Key words
left-hand material/metasurface/phase gradient metasurface/RCS/Snell's law分类
信息技术与安全科学引用本文复制引用
赵浥彤,张文琦,周健,相倩..一种基于相位梯度原理的反射型电磁超表面及RCS缩减应用[J].航空科学技术,2024,35(4):60-66,7.
