基于1/4模基片集成波导的单馈电小型圆极化天线

王倪金城徐晓文孙厚军

(北京理工大学信息与电子学院,北京 100081)

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6.18 dBic的高增益和3.44%的3 dB轴比带宽．

关键词圆极化天线;1/4模基片集成波导;单馈电

中图分类号TN821`+.1

文献标志码A

文章编号1005-0388(2015)04-0744-05

AbstractA 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 3 dB axial ratio bandwidth of 3.44%.

收稿日期：2014-09-07

作者简介

Single-fed compact circularly polarized antenna based on

quarter-mode substrate integrated waveguide

WANG NiJIN ChengXU XiaowenSUN Houjun

(SchoolofInformationandElectronics,BeijingInstituteofTechnology,Beijing100081,China)

Key words circularly polarized antenna; quarter-mode substrate integrated waveguide; single-fed

引言

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

联系人： 金 城 E-mail: jincheng@ieee.org

圆极化天线不但可以抑制雨雾干扰和抗多径反射,而且可以接收任意极化的来波,另外其辐射波也可由任意极化的天线接收[1],因此被广泛应用于雷达、无线通信系统和电子对抗等领域．随着通信技术的发展,通信系统设备的不断减小,对天线小型化的需求逐渐增多．同时在许多特殊应用的场合,特别是车辆、船舶、舰艇和飞机在内的卫星移动通信业务系统中,物理空间的限制提高了对天线小型化的需求．平面小型圆极化天线既能满足天线圆极化特性的要求,且体积小、又易与其他器件相集成,应用广泛．圆极化天线的主要实现方式有微带圆极化天线和波导圆极化天线．微带圆极化天线的……