摘要
提出一种由不同厚度和不同面积的多层介质板叠加制作多层介质覆盖层,代替传统单层介质覆盖层,提高Fabry-Perot(F–P)谐振腔天线增益和口径效率的设计方法。以工作频点5.8 GHz的F–P谐振腔天线设计为例,采用微带贴片天线作为馈源,由多层厚度分别为1 mm,1 mm和1.5 mm,直径分别为160 mm,130 mm和120 mm,相对介电常数为16的聚四氟乙烯介质板叠加制作该天线覆盖层。天线样品的测试结果与设计仿真结果吻合良好。与传统单层介质覆盖层相比,该多层介质覆盖层将工作频率5.8 GHz处天线增益由18.2 d Bi提高到19.1 d Bi,相应口径效率由70.02%增加到86.14%,天线|S_(11)|<-10 d B阻抗带宽和3 d B增益带宽略有提高,分别达到8.19%和11.90%。
A novel Fabry-Perot Resonant Antenna（FPRA） is proposed,which utilizes a multi-layer dielectric superstrate to enhance its gain and aperture efficiency. This multilayer superstrate is fabricated by assembling several dielectric plates with different thicknesses and areas. This FPRA works at 5.8 GHz,employs a patch antenna as its feed,and assembles three Teflon plates with different thicknesses（1 mm,1 mm and 1.5 mm） and diameters（160 mm,130 mm and 120 mm） but a same relative permittivity of 16 to be its superstrate. A prototype is fabricated and measured. The measurement results agree well with the simulation ones, and show,in comparison with the commonly adopted single-layer superstrate,the proposed multi-layer superstrate improves the F–P resonant antenna＇s gain from 18.2 d Bi to 19.1 d Bi at 5.8 GHz,correspondingly enhances the aperture efficiency from 70.02% to 86.14%, additionally,slightly increases the antenna＇s ｜S（11）｜-10 d B impedance bandwidth and 3 d B gain bandwidth,which are 8.19% and 11.90% respectively.
作者
刘士杰
陈星
LIU Shijie;CHEN Xing(School of Electronics and Information Engineering,Sichuan University,Chengdu Sichuan 610064,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2018年第3期486-489,共4页
Journal of Terahertz Science and Electronic Information Technology
关键词
介质覆盖层
F–P谐振腔天线
增益
口径效率
dielectric superstrate
Fabry Perot Resonant Antenna
gain
aperture efficiency
