EBG对圆波导介质棒相控阵扫描特性的改善  

Improvement of performance for circular waveguide dielectric-rod phased arrays with EBG

作　　者：梁乐[1] 李龙[1] 梁昌洪[1] 

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

出　　处：《电波科学学报》2007年第6期1038-1041,共4页Chinese Journal of Radio Science

基　　金：973重大项目基金资助(No:00300113)

摘　　要：将电磁带隙(EBG)结构应用到圆波导介质棒相控阵列中,利用EBG结构所具有的表面波带隙特性有效消除了相控阵中的扫描盲区。比较了无限阵列的扫描特性和有限阵列中心单元方向图在EBG加载前后的变化。仿真分析表明,以EBG结构作为圆波导介质棒相控阵的地平面,能有效消除扫描盲区,扩展扫描范围。A electromagnetic band-gap （EBG） structure is designed for the application in circular waveguide dielectric-rod phased arrays. The scan blind spot is eliminated using the surface wave band-gap characteristics of EBG structure. A comparion between the scan characteristics in infinite arrays and the radiation pattern of central unit in finite arrays integrated with or without EBG is presented. The simulations show that the EBG high-impedance surface structure utilized as the ground plane for dielectric-rod phased arrays will eliminate scan blind spot and widen the scan angular sectors.

关 键 词：圆波导介质棒相控阵 扫描盲区 EBG结构 

分 类 号：TN806[电子电信—信息与通信工程]