正交缝隙耦合馈电宽带圆极化微带天线设计
Journal of Air Force Engineering University（2014）
Abstract
为了实现圆极化微带天线的频带拓宽和增益提高,在缝隙耦合天线的基础上,设计了一种Ku频段正交缝隙耦合馈电的宽带圆极化微带天线.该天线以双层方形贴片为辐射单元,在拓展天线阻抗带宽的同时提高了增益;采用微带线结合正交左旋缝隙结构实现耦合馈电,通过优化缝隙结构改善了天线轴比特性.测量结果表明:阻抗带宽(VSWR＜2)和轴比带宽(AR＜3 dB)分别达到22.5％和16.2％,轴比带宽内天线增益均大于9 dBi.该结构天线以其简单的馈电设计为宽带圆极化微带天线设计提供了一定的参考价值.
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