展宽星载圆形微带天线阻抗带宽的方法探究  

Study for Widing Impendance Band of Spacebome Circular Microstrip Antenna

作　　者：张群[1] 刘波[1] 

机构地区：[1]西安空间无线电技术研究所,西安710000

出　　处：《空间电子技术》2009年第4期88-90,98,共4页Space Electronic Technology

摘　　要：迄今为止,多数文献只着眼于通过采用多层贴片结构来展宽微带天线的阻抗带宽,这使天线的可调参数多、结构安装复杂,对于带宽要求比较苛刻的情况可以通过多层贴片叠带来实现;对于带宽要求不太苛刻的情况,可以采用泪珠状探针来展宽微带天线的带宽。文章着重强调的是泪珠状探针可以减弱探针带来的电感效应,实现阻抗匹配,使得微带天线在满足VSWR≤1.3的条件下,带宽可以达到5%以上;满足VSWR≤1.5的条件下,带宽可以达到8%以上;满足VSWR≤2的条件下,带宽可以达到15%以上。o far,With the narrow bandwidth of microstrip antenna, most studies are applied to widen the impedance band of microstrip antenna by applying multi-layer microstrip antenna, normally, an impedance mating circuit is needed which introduces complexity and addition loss to the hybrid circuit, this way is applicable to exigent impedance bandwidth, contrarily,if bandwidth is not so rigid, a teardrop shaped probe can be used to widen band- width of microstrip antenna. In feeding a microstrip antenna with a relatively thick substrate, generally a large in- ductance occurs around the feed probe, especially a teardrop shaped probe, has be presented to effectively tune out the inductance and provide 5 percent bandwidth for 1.3 ; 1 VSWR impedance match ; provide 8 percent bandwidth for 1.5 ; 1 VSWR impedance match ; provide 15 percent bandwidth or more for2 ; 1 VSWR impedance match.

关 键 词：泪珠状探针 微带天线 带宽 阻抗匹配 

分 类 号：TN823.15[电子电信—信息与通信工程] TN82