基于H形缝隙耦合的宽带圆极化微带天线  

Broadband Circularly Polarized H-Shaped Aperture-Coupled Microstrip Patch Antenna

作　　者：张辉[1] 张晓发[1] 闫敦豹[1] 袁乃昌[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2007年第4期991-993,共3页Journal of Electronics & Information Technology

基　　金：国家973重大安全基础研究项目(51307);国家自然科学基金(60401011)资助课题

摘　　要：制作并测量了一种基于H形缝隙耦合的宽带圆极化微带天线,并讨论了天线的各结构参数对天线性能的影响。测量结果表明:通过Wilkinson功分器馈电,可使天线驻波带宽达47.5%,轴比带宽达50%,方向图前后比达-21dB,实现了低后瓣宽带圆极化微带天线的设计。Design of broadband circularly polarized microstrip patch antenna which is coupled by two H-shaped apertures is presented in this paper. Based upon the proximity coupling feed by the Wilkinson power divider, the proposed antenna can have a standing wave bandwidth of about 47.5% and the axial-ratio value within 3dB is about 50%. The front-to-back ratio of the antenna radiation pattern is better than -21dB, which indicate the realization of the good circularly polarized and low backward radiation level characteristics.

关 键 词：微带天线 宽带圆极化天线 H形缝隙耦合 

分 类 号：TN822.8[电子电信—信息与通信工程]