Wideband low-scattering metasurface with an in-band reconfigurable transparent window  

作　　者：朱瑛 杨维旭 段坤 姜田 赵俊明 陈克 冯一军 Ying Zhu;Weixu Yang;Kun Duan;Tian Jiang;Junming Zhao;Ke Chen;Yijun Feng(School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China)

机构地区：[1]School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China

出　　处：《Chinese Physics B》2024年第2期334-341,共8页中国物理B（英文版）

基　　金：Project supported by the Joint Fund of Ministry of Education for Equipment Pre-research (Grant No. 8091B032112);the National Natural Science Foundation of China (Grant Nos. 62271243 and 62071215);the Priority Academic Program Development of Jiangsu Higher Education Institutions;the Fundamental Research Funds for the Central Universities;Jiangsu Provincial Key Laboratory of Advanced Manipulating Technique of Electromagnetic Wave

摘　　要：Active metasurfaces with dynamically reconfigurable functionalities are highly demanded in various practical applications.Here,we propose a wideband low-scattering metasurface that can realize an in-band reconfigurable transparent window by altering the operation states of the PIN diodes loaded on the structures.The metasurface is composed of a band-pass frequency selective surface(FSS)sandwiched between two polarization conversion metasurfaces(PCMs).PIN diodes are integrated into the FSS to switch the transparent window,while a checkerboard configuration is applied in PCMs for the diffusive-reflective function.A sample with 20×20 elements is designed,fabricated,and experimentally verified.Both simulated and measured results show that the in-band functions can be dynamically switched between beam-splitting scattering and high transmission by controlling the biasing states of the diodes,while low backscattering can be attained outside the passband.Furthermore,the resonant structures of FSS also play the role of feeding lines,thus significantly eliminating extra interference compared with conventional feeding networks.We envision that the proposed metasurface may provide new possibilities for the development of an intelligent stealth platform and its antenna applications.

关 键 词：metasurface reconfigurable transparent window radar cross section(RCS)reduction 

分 类 号：TN957.51[电子电信—信号与信息处理]