基于高阻抗表面的螺旋天线设计

基于高阻抗表面的螺旋天线设计

内容简介：利用高阻抗表面的同相反射特性，将其加载到阿基米德螺旋天线背腔的边缘区域，从而改善了天线增益，实现低剖面设计。仿真结果显示，与传统背腔式螺旋天线相比，增益稳定性显著提高。在3~12 GHz的工作频段内，驻波比小于2，阻抗匹配良好，辐射方向图保持稳定。在约7.8 GHz的频带宽度内轴比小于3 dB，实现了较好的圆极化性能。

Abstract：Based on the in-phase reflection characteristic,the high impedance surfaces are placed on the edge region of Ar-chimedean spiral antenna backed cavity to improve the antenna gain and realize low-profile design. The results of simulation show that the stability of gain is enhanced significantly compared with traditional cavity-backed spiral antenna. The VSWR is smaller than 2 in the work frequency from 3 GHz to 12 GHz,so the impedance matching is proper,and the radiation pattern re-mains stable. The axial ratio is less than 3 dB when in the bandwidth of 7.8 GHz,so that circularly polarized wave can be achieved.

作者：韩曹政, 唐晋生, 李睿,

关键词：高阻抗表面, 阿基米德螺旋天线, 宽带, 低剖面, 圆极化,