摘要
An ultra-wideband 2-bit coding metasurface is designed for radar cross-section(RCS) reduction. The design process is presented in detail, in which a polarization conversion metasurface(PCM) is first proposed. The proposed PCM can realize ultra-wideband circular polarization(CP) maintaining reflection. Moreover, Pancharatnam–Berry(PB) phase will be generated in the co-polarized reflection coefficient by rotating the metallic patches in its unit cells. Thus, based on the PCM, the four coding elements of a 2-bit coding metasurface are constructed using PB phase, and an ultra-wideband PB 2-bit coding metasurface is proposed according to an appropriate coding sequence. The simulated and experimental results show that the coding metasurface has obvious advantages of wideband and polarization-insensitivity. Compared to a metallic plate of the same size, it can achieve more than 10 dB RCS reduction in the frequency band from 9.8 GHz to 42.6 GHz with a relative bandwidth of 125.2% under normal incidence with arbitrary polarizations.
作者
林宝勤
黄文准
吕林涛
郭建新
王衍文
叶红军
Bao-Qin Lin;Wen-Zhun Huang;Lin-Tao Lv;Jian-Xin Guo;Yan-Wen Wang;Hong-Jun Ye(School of Information Engineering,Xijing University,Xi'an 710123,China)
基金
Project supported by the National Natural Science Foundation of China (Grant No. 62072378)
the Natural Science Foundation of Shaanxi Province, China (Grant No. 2019JM077)
the Xi’an Science and Technology Plan Project, China (Grant No. GXYD20.4)。