一种新型小型圆极化GPS微带天线的设计与实现  

Design and implementation of a novel miniaturized circularly polarized GPS microstrip antenna

作　　者：宋小弟[1,2] 冯恩信[1] 傅君眉[1] 

机构地区：[1]西安交通大学微波与光通信研究所,陕西西安710049 [2]华东电子工程研究所天馈部,安徽合肥230031

出　　处：《西安电子科技大学学报》2009年第6期1108-1113,共6页Journal of Xidian University

基　　金：国家部委预研重点基金项目资助(9140A07011307DZ4801)

摘　　要：设计制作了一种新颖的宽带EBG(Electromagnetic Bandgap)结构小型圆极化GPS微带贴片天线单元.采用Koch矩形分形设计圆极化GPS微带贴片天线和特定尺寸的EBG结构,一方面有效减小了天线单元的尺寸,另一方面有效抑制其工作时产生的表面波,改善了其工作性能.仿真和实测结果表明,相对于普通矩形结构的微带贴片天线单元,该分形天线单元尺寸减小了约27%.同时,采用EBG结构使工作频率上的3 dB轴比带宽增加了约30%,增益增加约0.2 dB.A novel miniaturized circularly polarized microstrip antenna with the EBG structure for GPS applications is designed and constructed. The size of the circularly polarized GPS microstrip antenna desiged by the Koch rectangle fractal is reduced considerably. And the properties of bandwidth and gain are improved effectively due to the introduction of given size EGB designed by the Koch rectangle fractal. Simulation and experimental results show that, compared with the conventional rectangle structure, the proposed antenna has reduced the size by 27%, and increased the axial-ratio bandwidth by about 30% as well as the gain by 0.2 dB due to the application of the EBG structure.

关 键 词：分形天线 圆极化 EBG结构 GPS天线 

分 类 号：TN822[电子电信—信息与通信工程]