单馈电双模方形微带天线及圆极化实现  

Single-feed dual-mode square microstrip antenna and realization of circular polarization

作　　者：董玉良[1] 郑会利[1] 张士选[1] 

机构地区：[1]西安电子科技大学,陕西西安710071

出　　处：《电波科学学报》2002年第2期179-181,共3页Chinese Journal of Radio Science

摘　　要：基于展开理论 ,给出了沿贴片对角线馈电时方形微带天线的内场分布和输入阻抗公式。通过在贴片四周切割缝隙 ,有效地降低了天线双主模的谐振频率并实现了圆极化辐射 ,讨论了缝隙长度与天线极化之间的关系。为实现微带天线的小型化提供了一种新途径 ,给出了The field distribution inside antenna and the input impedance for square microstrip antenna excited along diagonal are presented by using mode expansion theory. The resonant frequencies of two dominant modes can efficently be reduced and circularly polarized radiation can easily be achieved by cutting silits in outer boundary of square patch.The relation between slit length and antenna polarization charactersistics is presented. A new approach to miniaturization of microstrip antenna is presented, and a UHF microstrip antenna is designed.

关 键 词：双模 方形 微带天线 单点馈电 圆极化 

分 类 号：TN821[电子电信—信息与通信工程]