在接地板开U型缝消除微带天线杂谐振点的方法

一种在接地板开U型缝消除微带天线杂谐振点的方法

内容简介：本文提出一种消除微带天线杂谐振点的方法，该微带天线为双层介质板，其谐振频率为2.4 GHz ，共有两个杂谐振点分别在4.4 GHz 附近及5.8 GHz 附近。这两个杂谐振点破坏了微带天线的性能，故本文通过在接地板上合理地开 U 型缝来消除这两个谐振点，U 型缝隙的长度为相应频率谐振点波长的一半；如果在缝隙上有开放端口，则 U 型缝隙长度为相应频率谐振点波长的四分之一。仿真结果表明：该方法可有效消除杂谐振点。

Abstract：A method is proposed to eliminate undesired resonant points of a dual-layer circular polarization microstrip antenna ,the frequency of which is 2 .42 GHz .The simulation results show that there are two undesired resonant points ,the frequencies of which are both greater than the resonant frequency .One is around 4 .4 GHz ,while the other is around 5 .8 GHz .As they would disturb the proper functioning of the antenna ,the paper will eliminate the undesired resonant points by cutting U-shaped slots on the ground .Size of the slot is half of the wavelength of corresponding frequency point if slot is cut on the patch ,while it is a quarter of the wavelength if there is a opening port on the slot .The simulation results show that it’s effective to eliminate the undesired resonant points in this way .

作者：滕飞, 程秀洋,

关键词：谐振点, 微带天线, U 型缝, 仿真,