一种高增益低RCS微带天线设计  

A Novel Low RCS Design for Patch Antenna with High Gain Performance

作　　者：丛丽丽[1] 曹祥玉[1] 李文强[1] 赵一[1] 宋涛[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《空军工程大学学报（自然科学版）》2015年第2期67-72,共6页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61271100;61471389);陕西省自然科学基础研究计划资助项目(2012JM8003)

摘　　要：设计了一种基于人工电磁材料的覆层,并将其应用于微带天线。该覆层由介质板及其两侧的人工周期表面构成,上表面是加载集总电阻的方环贴片,具有宽带吸波特性;下表面是开条带缝和圆环缝的金属贴片,具有部分反射特性。将其加载到微带天线的上方,通过上层的吸波表面吸收入射电磁波并结合下层的部分反射表面与金属地板构成Fabry-Perot（F-P）谐振腔增强天线的定向性,以实现微带天线辐射和散射性能的改善。仿真和实测结果表明加载人工电磁材料覆层后,天线的RCS在2～14GHz宽频带范围内实现了明显的减缩,最大减缩量达到28.3dB而天线的增益在工作频带内都得到了提升,最大提高了4.3dB。A novel design for patch antenna, which can obtain low radar cross section （RCS） and high gain performance simultaneously, is proposed on the basis of metamaterial superstratum. The superstratum consists of two metallic layers with different patterns on both sides of a dielectric substrate. Low reflection and transmission are obtained from the upper surface which can absorb most of the incident wave to reduce the antenna RCS. The bottom surface, which has partial reflectivity, is used to construct a Fabry-Perot resonance cavity with the ground plane of the patch antenna to improve its directivity. Simulated and meas- ured results show that the proposed antenna can achieve an obvious RCS reduction in a broad frequency band ranging from 2 to 14 GHz and the maximum reduction can reach 28.3 dB, and yet the gains of the an- tenna are all enhanced and some are even enhanced maximally by 4.3 dB in the working frequency band compared with the original antenna.

关 键 词：人工电磁材料 覆层 雷达散射截面 吸波 Fabry-Perot谐振腔 

分 类 号：TN82[电子电信—信息与通信工程]