一种带有透波窗口的宽带RCS缩减超表面设计  

A Novel Design of a Wideband RCS Meta-Surface Reduced with Transmission Window

作　　者：富新民 韩亚娟[1] 王甲富[1] 赵然 贾宇翔 庞永强 屈绍波[1] 徐卓[3] FU Xinmin;HAN Yajuan;WANG Jiafu;ZHAO Ran;JIA Yuxiang;PANG Yongqiang;QU Shaobo;XU Zhuo(Department of Basic Science,Air Force Engineering University,Xi’an 710051,China;Unit 93128,Beijing 100843,China;School of Electronic and Information Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]空军工程大学基础部,西安710051 [2]93128部队,北京100843 [3]西安交通大学电信工程学院,西安710049

出　　处：《空军工程大学学报（自然科学版）》2022年第1期23-29,共7页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：国家自然科学基金(61971435);空军工程大学基础部科研基金(JK2021206)。

摘　　要：超表面在调控电磁波的极化、幅值和相位等方面具有极大的优势。针对天线带外低散射的现实需求,通过复合极化旋转超表面和频率选择表面,调节极化旋转单元的响应厚度,实现了兼具高效极化旋转反射和同极化透波窗口的超表面设计。利用几何相位仅对交叉极化波有响应的特性,进一步通过棋盘阵列排布,在透波窗口的两侧实现低散射特性,其中透波带10.0~11.0GHz插损低于1dB;在4.5~7.5GHz和12.0~17.0GHz频带内实现低散射特性,RCS缩减接近10dB。仿真和实验结果表明:文中所提出的超表面设计方法和架构具有宽带的RCS缩减特性和低插损透波特性,在隐身天线罩中具有潜在的应用价值。In view of the practical needs of low out-of-band scattering of antenna,through adjusting the response thickness of polarized conversion meta-surface by combining the frequency selective surface,a meta-surface is designed to utilize both efficient cross-polarized reflection and co-polarized wave transmission window.Furthermore,this paper utilizes the geometric phase in response only to cross-polarized waves,through the checkerboard array configuration,for realizing the low scattering characteristics on both sides of the translucent window,in which the penetration loss of 10.0~11.0 GHz insertion loss is less than 1 dB and up to 0.8 dB.Besides,and the Low scattering characteristics are achieved in the 4.5~7.5 GHz and 12.0~17.0 GHz bands with RCS reduction of nearly 10 dB.The simulation and experimental results show that the proposed meta-surface design method and architecture are characterized by the broadband RCS reduction and low penetration loss,and have potential application value in stealth radome.

关 键 词：超表面 极化旋转 频率选择表面 天线罩 RCS缩减 透波窗口 

分 类 号：TN820[电子电信—信息与通信工程]