宽频带吸波/反射状态可电控切换龙伯透镜反射器设计  

Design of a Luneburg lens reflector with adjustable broadband absorption/reflection function

作　　者：吴祯 支迦豪 李荣浩 武亚君 曹群生[2] 王毅[2] WU Zhen;ZHI Jiahao;LI Ronghao;WU Yajun;CAO Qunsheng;WANG Yi(National Key Laboratory of Scattering and Radiation,Shanghai 200438,China;College of Electronic Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]散射辐射全国重点实验室,上海200438 [2]南京航空航天大学电子信息工程学院,南京210016

出　　处：《电波科学学报》2023年第6期1007-1014,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金面上项目(61871219)。

摘　　要：本文对传统的龙伯透镜反射器采用有源频率选择表面(active frequency selective surface,AFSS)技术进行电磁结构的设计,用具有吸波/反射可切换的AFSS龙伯透镜反射器代替金属反射板,达到对入射电磁波的反射强度和雷达散射截面(radar cross section,RCS)大小可调、工作状态可切换的主动型龙伯透镜反射器.仿真结果表明,在X波段内,设计的新型龙伯透镜反射器可实现吸波/反射功能的可切换以及单站RCS可调,大小相差约8 dB.通过对龙伯透镜AFSS反射器进行实物加工与测试,测试结果和仿真结果较为吻合,实现了龙伯透镜反射器在一定频段内工作状态切换和RCS可调.This paper will use active frequency selective surface(AFSS)technology to design the electromagnetic structure of traditional Luneburg lens reflectors.AFSS Luneburg lens reflectors with switchable absorption/reflection will be used instead of metal reflectors to achieve an active Luneburg lens reflector that can adjust the reflection intensity/radar cross section(RCS)size of incident electromagnetic waves and switch the working state.The simulation results show that the designed new Luneburg lens reflector can achieve switchable absorption/reflection functions and adjustable monostatic RCS in the X-band,with a difference of about 8 dB.Finally,the physical processing and testing of the new Luneburg lens are carried out,and the measure results are in good agreement with the simulation results,achieving the switching of the working state of the Luneburg lens reflector within a certain frequency band and the adjustable RCS.

关 键 词：龙伯透镜反射器 有源频率选择表面(AFSS) 电磁波吸收/反射 电磁特性可切换 雷达散射截面(RCS) 

分 类 号：TN820.84[电子电信—信息与通信工程]