新型的低RCS圆极化微带天线设计  

Design of Novel Low RCS Circularly Polarized Microstrip Antenna

作　　者：张磊[1,2] 董涛 尹建勇[3] 

机构地区：[1]北京卫星信息工程研究所,北京100086 [2]天地一体化信息技术国家重点实验室,北京100086 [3]北京理工大学,北京100081

出　　处：《现代防御技术》2017年第6期145-150,共6页Modern Defence Technology

摘　　要：针对圆极化微带天线的宽频带雷达散射截面(RCS)减缩问题,提出了一种新颖的超材料覆盖层结构,该结构同时具有部分反射特性和宽频带的极化旋转特性,可以在提高天线增益的同时实现RCS的宽频带减缩。仿真结果表明:与普通的圆极化微带天线相比,加载了超材料结构的天线,其增益在中心频率处提高了1.4 dB;同时,在9.7~21 GHz频带范围内,加载超材料的圆极化微带天线具有更低的RCS电平,整个频段内,平均减缩幅度达9.06 dB(X极化)和9.21 dB(Y极化)。仿真结果验证了设计的正确性,表明该方法可以有效的实现圆极化微带天线的宽频带RCS减缩,对圆极化微带天线的隐身技术有重要的借鉴作用。For wideband radar cross section（ RCS） reduction of circular polarized（ CP） microstrip antennas,a novel metasurface with the partially reflecting characteristics and the polarization conversion characteristics is proposed to enhance the gain and broaden the RCS reduction bandwidth of CP microstrip antennas simultaneously. The simulated results indicate that the gain of the proposed antenna is enhanced about 1. 4 dB around the operating frequency compared with the reference microstrip antenna. The proposed antenna has a lower RCS value than the reference antenna in the frequency range from 9. 7 GHz to 21 GHz,in which the average RCS reduction is 9. 06 dB for xpolarized incident wave and 9. 21 dB for ypolarized incident wav erespectively. The simulated results demonstrate the validity of the design and show that the proposed method helps to realize the wideband RCS reduction of CP microstrip antennas and is useful for the stealth technology of CP microstrip antennas.

关 键 词：雷达散射截面减缩 微带天线 圆极化 超材料 极化旋转 部分反射表面 宽频带 增益提升 

分 类 号：TN822.4[电子电信—信息与通信工程]