低剖面RCS可控的龙伯透镜反射器  

Low⁃profile RCS controllable Luneburg lens reflector

作　　者：赵瑞鹏 曾昭锋 王伟东 穆磊 莫锦军 ZHAO Ruipeng;ZENG Zhaofeng;WANG Weidong;MU Lei;MO Jinjun(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;National Key Laboratory of Science Technology on Test Physics and Numerical Mathematics,Beijing 100076,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]试验物理与计算数学国家级重点实验室,北京100076

出　　处：《现代电子技术》2023年第15期167-171,共5页Modern Electronics Technique

基　　金：广西无线宽带通信与信号处理重点实验室主任基金(GXKL06200111)。

摘　　要：传统龙伯透镜反射器用金属做反射面,可在全频段内实现对电磁波能量的全反射,其雷达散射截面(RCS)特性不可变。采用半球龙伯透镜代替龙伯透镜反射器中的全球龙伯透镜来减轻重量、降低剖面。为了达到对半球龙伯透镜反射器散射特性可控的目的,使用有源频率选择表面(AFSS)吸波器代替半球龙伯透镜反射器金属地面,通过AFSS吸波器的吸波/反射功能,使半球龙伯透镜反射器实现对能量的吸波/反射。仿真结果表明,低剖面龙伯透镜反射器在俯仰方向θ=20°~90°时吸波/反射状态下RCS之间的差值在8 dB以上;在方位方向ϕ=-90°~90°具有130°宽角响应,且吸波/反射状态下RCS之间的差值在8 dB以上。研究结果表明,该龙伯透镜反射器在吸波与反射状态下具有较好的切换效果,实现了RCS的调控。Metal is used as the reflecting surface of the traditional Luneburg lens reflector,which can realize the total reflection of electromagnetic wave energy in the full frequency range,and its radar cross section(RCS)characteristics are unchangeable.The hemispherical Luneburg lens is used to replace the spherical Luneburg lens in the Luneburg lens reflector,so as to reduce the weight and lower the profile.In order to control the scattering characteristics of the hemispherical Lambert lens reflector,the active frequency selective surface(AFSS)absorber is used to replace the metal ground of the hemispherical Lambert lens reflector,so that the hemispherical Luneburg lens reflector can achieve the absorption/reflection of energy by the absorption/reflection function of the AFSS absorber.The simulation results show that the difference between RCS in the absorbing/reflecting state is above 8 dB when the low⁃profile Luneburg lens reflector is in the pitching direction ofθ=20°~90°;it has a wide angular response of 130°in the azimuth directionϕ=-90°~90°,and the difference between RCS in the absorbing/reflecting state is above 8 dB.The research results show that the Luneburg lens reflector has a good switching effect in the absorbing and reflecting states,and can realize the control of RCS.

关 键 词：龙伯透镜反射器 半球龙伯透镜 雷达散射截面调控 有源频率选择表面吸波器 吸波 反射 

分 类 号：TN820.84-34[电子电信—信息与通信工程]