一种高增益强定向波导缝隙天线

一种高增益强定向波导缝隙天线

内容简介：设计并制备了一种在5.42~5.80 GHz 频带内反射系数相位曲线斜率为正(一般为负)、幅度模值均在0.83以上、具有部分反射特性的双屏频率选择表面,并将该FSS以覆层的形式加载到波导缝隙天线辐射方向上,使其具有更宽的带宽,更高的增益,更强的定向性。采用射线理论和 Fabry-Perot 谐振腔模型分析了新波导缝隙天线辐射改善机理,并进行仿真和实验验证。仿真和实测结果表明：相比原始天线,加载覆层后,天线带宽增加了34.6%,鼻锥方向增益提高了6.94 dB,E、H 面半功率主瓣宽度分别减小了24°和128°。

Abstract：A double screen FSS with positive reflection phase gradient(the general with negative slope),a-bove 0.83 reflection magnitude value and partially reflection features at 5.42~5.80GHz is designed and fab-ricated,the new waveguide antenan bandwidth is broadened,gain is improved and directivity is enhanced by applying the double screen FSS as a radome on the radiation orientation.The FSS radiation enhanced and scattering reduced mechanism are analyzed by adopting ray theory and Fabry-Perot resonator model,and the capabilities of new antenna are validated by simulation and experimentation.The results show that:the bandwidth of the antenna is increased by 34.6% and the gain of the antenna is enhanced by 6.94 dB,and the half-power beam width of E-plane and H-plane are reduced by 240 and by1280 respectively.

作者：郑月军, 高军, 曹祥玉, 袁子东, 李文强,

关键词：频率选择表面, 反射系数, 高增益, 波导缝隙天线,