基于十字形缝隙耦合的宽带圆极化微带天线设计  

Design of wideband circularly polarized microstrip antennas based on crossed aperture-couple

作　　者：何越[1] 余志勇[2] 路宏敏[1] 杨晔[1] 吉陈力[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071 [2]第二炮兵工程大学,陕西西安710025

出　　处：《现代电子技术》2013年第19期77-79,共3页Modern Electronics Technique

摘　　要：为了改善微带天线的带宽性能,提出了一种采用十字形缝隙作为馈电方式,利用三个Wilkinson功分器组成馈电网络的宽带圆极化微带天线的设计方法。讨论了构建这种微带天线的基本技术,借助HFSS仿真软件进行设计和验证。依据设计结果委托专业研究所制作了实物天线,测试结果表明,该天线的阻抗带宽和3 dB轴比带宽分别达到40.38%和20.7%,中心频率为2.6 GHz,测量结果与仿真结果吻合良好,为低后瓣和宽带圆极化微带天线设计提供了一种新的工程设计方法。In order to improve the performance of the bandwidth, a method to design a wideband circularly polarized mi- crostrip antenna is presented, which uses three Wilkinson power dividers as the feed network, and a crossed slot as the feeding way. The basic techniques of modeling this antenna are discussed and it is designed and verified by HFSS. A prototype is fabricated according to the design and measured by a professional research institute. The experiment results show that the impedance band- width achieves 40.38% and the 3 dB axial-ratio bandwidth is about 20.7%, the center frequency is 2.6 GHz, the measured results fit well with the simulated results. A new method of engineering design for low back lobe and wideband circular polarized microstrip antenna is provided.

关 键 词：微带天线 圆极化 缝隙耦合 WILKINSON功分器 

分 类 号：TN821-34[电子电信—信息与通信工程]