宽带高增益环形圆极化微带天线  

Wideband high-gain ring circularly polarized microstrip antenna

作　　者：陈青青 李建瀛[1] 丁宇昕 张凌凯 冯耀 谢静 CHEN Qingqing;LI Jianying;DING Yuxin;ZHANG Lingkai;FENG Yao;XIE Jing(School of Electronics and Information,Northwestern Polytechnical University,Xi'an 710129,China)

机构地区：[1]西北工业大学电子信息学院

出　　处：《西安电子科技大学学报》2019年第6期46-51,共6页Journal of Xidian University

基　　金：国家自然科学基金（61601372,61771404,61871324）

摘　　要：为了展宽环形切缝微带天线的轴比带宽,设计了两款新型具有宽频带特性的单馈环形圆极化微带天线。通过在环形辐射贴片上开横向槽扰动贴片上的表面电流分布,激励两个幅度相等、相位相差90°的工作模式,实现圆极化波辐射。实验结果表明,圆形环和方形环圆极化天线的工作频段分别在3.74~3.98GHz(轴比带宽约为6.2%)和3.80~4.04GHz(轴比带宽约为6.1%)频段具有良好的圆极化特性,其轴比小于3dB,且电压驻波比小于2。另外,在工作频段内,两款天线测试的峰值增益均大于10.0dB。Two novel single-fed ring circularly polarized microstrip antenna with an enhancing bandwidth are designed to broaden the axial ratio bandwidth of the cut ring patch antenna.Since the lateral slot perturbs the surface current of the ring patch,two equal-amplitude radiation modes with a phase difference of 90°are excited to radiate circular polarization.The measured results show that good circularly polarized characteristics of the annular-ring and the square-ring antennas have been obtained respectively from 3.74 to3.98 GHz and from 3.80 to 4.04 GHz.The axial ratios(ARs)are less than 3 dB and the voltage standing wave ratios(VSWR)are less than 2.In addition,the antenna peak gains are higher than 10.0 dB for annular-ring and square-ring microstrip antennas over the operating bandwidth.

关 键 词：单馈 宽带 高增益 圆极化 微带天线 

分 类 号：TN823[电子电信—信息与通信工程]