一种超宽带雷达散射截面减缩的超表面设计  

Design of a metasurface with ultra-wideband radar cross section reduction

作　　者：郑秋容[1] 余建辉[2] 李勇军[1] 赵尚弘[1] 赵维维 ZHENG Qiurong;YU Jianhui;LI Yongjun;ZHAO Shanghong;ZHAO Weiwei(School of Information and Navigation,Air Force Engineering University,Xi’an 710077,China;Key Laboratory of Road Construction Technology and Equipment of Ministry of Education,Chang’an University,Xi’an 710064,China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077 [2]长安大学道路施工技术与装备教育部重点实验室,陕西西安710064

出　　处：《现代电子技术》2019年第13期5-8,14,共5页Modern Electronics Technique

基　　金：国家自然科学基金(61571461);国家自然科学基金(61603409);国家自然科学基金(61603412)~~

摘　　要：提出一种具有超宽带雷达散射截面(RCS)减缩特性的超表面(MS)。该MS结构由聚四氟乙烯(Polytef)介质层、空气层和金属地板组成,同时在Polytef介质层的两侧刻蚀金属图案。为了拓展RCS,减缩带宽,设计两种几何结构相似但是工作在不同频段的宽带双频单元,两种单元的有效相位差区域得到极大拓展。采用经典的棋盘方式进行布阵,实现了超宽频带的RCS减缩。仿真和实验结果表明,与等尺寸金属平板相比,该MS在3.0~20.0GHz的频带范围,后向RCS均有减缩,其中在5.3~17.7GHz(107.8%)的范围,后向RCS减缩基本都在10dB以上,证实了MS的超宽带RCS减缩特性。A metasurface (MS) with ultra - wideband radar cross section (RCS) reduction feature is proposed. The MS structure is composed of polytef dielectric layer,air layer and metallic substrate,in which the metal patterns are etched on both sides of the polytef dielectric layer. In order to broaden the RCS reduction bandwidth of MS,two dual-band MS units with similar geometry but working in different bands are designed,which can expand the effective phase difference area of two units. The classical chessboard mode is used for configuration to realize the ultra - wideband RCS reduction. The simulation and experimental results show that,in comparison with the same-size metallic plane,the backward RCSs are reduced while MS is within 3.0~20.0 GHz. The RCS reduction is more than 10 dB while MS is within 5.3~17.7 GHz(107.8%). The ultra-wideband RCS reduction performance of MS is verified with the above results.

关 键 词：超表面设计 雷达散射截面 超宽带RCS减缩 零反射相位 带宽拓展 人工磁导体 布阵方式 

分 类 号：TN95-34[电子电信—信号与信息处理]