超宽频带圆极化微带天线阵列的设计  

Design of the Ultra-broad Band Circular Polarization Microstrip Antenna Array

作　　者：李中[1] 王光明[2] 高向军[2] 

机构地区：[1]防空兵指挥学院,郑州450052 [2]空军工程大学导弹学院,陕西三原713800

出　　处：《现代雷达》2009年第1期66-68,共3页Modern Radar

摘　　要：提出了一种多层结构的宽带圆极化辐射单元,该单元采用上下2个贴片切角和空气层的层叠结构,实现了天线的宽带圆极化和宽带匹配特性。在此基础上,利用圆极化天线阵的宽带馈电技术,设计了一种超宽频带四元组合圆极化微带天线阵。经过仿真计算,天线工作于C波段时,阻抗带宽和3 dB轴比带宽分别达到了41%(VSWR<2)和34%,其带宽对一般的圆极化微带天线有大幅度的增加。该超宽频带的圆极化天线在通信、雷达等领域的应用前景相当广阔。One kind of multilayer broadband circular polarized radiation element is suggested in this paper, which adopts a layered structure with two patches of truncated corners with air in-between. Thus the wide-band circular polarization and wide-band match is realized. Based on these, using the broadband feeding technique, an ultra-broad band circular polarization microstrip antenna composed of four elements is designed. Through simulation, the antenna would have 41% （ VSWR 〈 2 ） impedance bandwidth and 34% 3 dB axial ratio bandwidth respectively, which is increased largely in comparison with the conventional circular polarization mierostrip antenna. Such ultra-broad band circular polarization microstrip antenna can be used widely in communication, radar fields.

关 键 词：微带天线 圆极化 超宽频带 

分 类 号：TN821.1[电子电信—信息与通信工程] TN822.8