小型宽带宽波束圆极化微带天线设计

一种小型宽带宽波束圆极化微带天线设计

内容简介：介绍了一种小型宽带宽波束圆极化微带天线设计。该天线采用双层短路贴片,通过旋转结构设计结合多点馈电技术,实现了微带天线的宽带宽波束圆极化辐射。仿真与测试结果表明：VSWR〈2的阻抗带宽为15.9%（1.45～1.7 GHz）,半功率波束宽度和3 dB轴比波束宽度在8.6%（1.45～1.58 GHz）的频带内均大于100°,天线尺寸仅为0.43λ×0.43λ×0.035λ。

Abstract：A new type of miniaturized wide-bandwidth and wide beamwidth circularly polarized microstrip antenna is designed.The antenna is composed of dual-resonant stacked shorted patches.A sequentially rotated structure with four feeding point is selected to acquire wide-bandwidth and wide beamwidth circularly polarized radiation.Simulated and measured results show that its impedance bandwidth(VSWR2) is 15.9%(1.45-1.7 GHz),the half-power and the 3 dB axial ratio beamwidth are more than 100°within the bandwidth of 8.6%(1.45-1.58 GHz).The antenna size is only 0.43λ×0.43λ×0.035λ(λis the free space wavelength ofthecenter frequency).

作者：郭倩, 梁仙灵, 叶声, 金荣洪, 耿军平,

关键词：微带天线, 圆极化, 小型化, 宽波束,