级联型高阻抗表面减缩双频天线雷达截面方法  

Application of cascaded HIS for RCS reduction of dual-band antenna

作　　者：龚琦[1] 焦永昌[1] 龚书喜[1] 张帅[1] 刘英[1] 

机构地区：[1]西安电子科技大学天线与微波技术国防科技重点实验室,陕西西安710071

出　　处：《电波科学学报》2014年第1期99-105,134,共8页Chinese Journal of Radio Science

基　　金：教育部"新世纪优秀人才"支持计划(NCET-11-0690);高等学校博士学科点专项科研基金资助课题(20120203120011);国家自然科学基金资助(No.61201018)

摘　　要：针对双频天线的带内雷达散射截面(Radar Cross Section,RCS)减缩难题,提出一种高阻抗表面(High Impedance Surface,HIS)加载技术的隐身新途径:对应天线的两个工作频段,基于同相反射相位带隙,设计两种HIS结构,进行级联后加载到双频天线结构中,通过二者散射场的对消,实现入射波垂直照射下、天线两个工作频带内RCS的减缩.结果表明:加载级联HIS结构后,双频天线基本保持其原有辐射特性,同时,在两个工作频带内分别实现了5dB和15dB以上的减缩效果.The in-band radar cross section（RCS）of antenna can be reduced by high impedance surface（HIS）due to the reflection phase band-gap.For the basic square HIS, one size has only one reflection phase band-gap.Dual reflection phase band-gap HIS structure is realized by the method of different parameters cascading in this paper,and the cascaded HIS structure is fabricated on the dual-band antenna to reduce the RCS. The simulation and measured results show that compared with the original antenna the in-band RCS of the U-shape dual-band antenna is reduced by at least 15dB at lower frequency and 5dB at higher frequency.

关 键 词：高阻抗表面 同相反射相位带隙 级联 雷达散射截面 双频 

分 类 号：TN82[电子电信—信息与通信工程]