基于1/4模基片集成波导的单馈电小型圆极化天线  

Single-fed compact circularly polarized antenna based on quarter-mode substrate integrated waveguide

作　　者：王倪[1] 金城[1] 徐晓文[1] 孙厚军[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《电波科学学报》2015年第4期744-748,共5页Chinese Journal of Radio Science

基　　金：北京理工大学优秀青年教师资助计划-跨学科项目(3050012331524)

摘　　要：1/4模基片集成波导可等效为由两个磁壁和一个电壁组成的等腰直角三角形波导.采用基于等腰直角三角形波导的空腔模式法分析了1/4模基片集成波导,得到了横电波模和横磁波模的表达式.基于1/4模基片集成波导设计了一种单微带馈电的平面小型圆极化天线.仿真结果表明:该天线可以实现右旋圆极化,且具有6.18dBic的高增益和3.44%的3dB轴比带宽.A quarter-mode substrate integrated waveguide(QMSIW)is equivalent to an isosceles right triangular waveguide with two magnetic walls and one electric wall at the hypotenuse of the triangular.The mode solutions of the QMSIW are determined based on the cavity model of an isosceles right triangular waveguide,both transverse electric and transverse magnetic mode shapes are presented in this paper.Single microstrip-fed antenna based on QMSIW with planar compact circular polarization is proposed and designed.The simulation results show that this antenna exhibits right-handed circularly polarized radiation with a high gain of 6.18 dBic and 3dB axial ratio bandwidth of3.44%.

关 键 词：圆极化天线 1/4模基片集成波导 单馈电 

分 类 号：TN821.1[电子电信—信息与通信工程]