初级馈源位置对Fabry-Perot谐振天线性能的影响  

Effect of Location of Primary Source on Fabry-Perot Resonator Antenna

作　　者：刘震国[1] 

机构地区：[1]东南大学毫米波国家重点实验室,南京210096

出　　处：《现代雷达》2011年第1期59-62,共4页Modern Radar

基　　金：国家自然科学基金资助项目(60921063)

摘　　要：通过平面波叠加法,分析了初级馈源位置对PEC和PMC作为接地板的2类Fabry-Perot谐振天线的最大方向性系数及其带宽的影响。分析表明初级馈源位置在满足特定条件取值时,Fabry-Perot谐振天线将获得最大的定向性,但其定向性带宽并不随馈源位置有明显改变。同时,首先指出定向性与其带宽的乘积仅是Fabry-Perot谐振天线的反射盖板其反射系数模的函数,并随着反射系数模的增加而趋于某一定值。最后进行了仿真验证,仿真结果与理论计算具有很好的一致性,对Fabry-Perot谐振天线的设计具有很好的理论指导意义。The directivity and its bandwidth properties of Fabry-Perot resonator antennas made of two different ground plate covered with a partially-reflecting surface are studied theoretically, respectively. The relationship between the directivity and the primary source location is also obtained. It is shown that the dlrectivity of Fabry-Perot resonator will obtain its maximum when primary source is located at certain of position for different type of ground plate. But the directivity bandwidth will not very obviously with the source location. At the same time the normalized product of maxium of directivity and its bandwidth is a function of reflection coefficient of partially reflective surface, which trends to certain constant with increase of reflection coefficient. Finally the simulated results of planar Fabry-Perot resonator antenna are validated to have good agreement with the calculated theoretically.

关 键 词：Fabry-Perot谐振天线 带宽 部分反射表面 

分 类 号：TN821[电子电信—信息与通信工程]