摘要
设计了一种柔性非定向低散射2 bit编码超表面。将4种具有不同反射相位的基本单元随机排列构成整个相位梯度超表面,其对入射电磁波形成无规则散射,实现RCS缩减特性。实验结果表明：在频点8.40 GHz处,编码超表面的垂直入射反射率为-13.5 dB,偏离法线-30°～30°范围RCS平均缩减为10.0 dB。进一步的研究结果表明,编码超表面弯曲在直径为7 cm的圆柱面上,RCS平均缩减可达7.8 dB。该超表面可实现曲面的RCS有效缩减。该柔性编码超表面在天线、电磁隐身等领域具有潜在的应用价值。
In this paper, we propose a non-directional lowing scattering and flexible 2 bit coding metasurface. The four basic units with different reflection phase constituted the whole phase gradient surface by random arrangement; this coding metasurface can achieve reduction of RCS by the diffuse reflection of incident electromagnetic wave. The experimental results show that the reflectivity is -13.5 dB for coding metasurface can be achieved at 8.40 GHz, and the RCS reduction as compared with a bare metallic plate with the same size is average 10.0 dB when deviating -30° -30° from the normal incidence. The further studied results indicate that the characteristic of RCS reduction can be kept up as the coding metasurface is wrapped around a cylinder with a diameter of 7 cm, and the RCS reduction is average 7.8 dB. This flexible coding metasurface is expected to have potential application value in the field of antenna and stealth.
作者
杨家稷
程用志
裴小军
聂彦
龚荣洲
YANG Jia-ji;CHENG Yong-zhi;PEI Xiao-jun;NIE Yan;GONG Rong-zhou(School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China;School of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan 430081, China)
出处
《微波学报》
CSCD
北大核心
2018年第3期26-30,36,共6页
Journal of Microwaves
基金
国家自然科学基金联合基金项目(U1435209,61605147)
湖北省科技厅自然科学基金项目(2017CFB588)
关键词
编码超表面
非定向散射
RCS缩减
coding metasurface
non-direction scattering
RCS reduction
