高功率双层径向线螺旋阵列天线实验研究

 介绍了高功率双层径向线螺旋阵列天线的模拟优化结果，对按照优化结构尺寸加工的阵列天线进行了实验研究。在实验中，设计了用于连接标准接口和天线输入口的阻抗变换器，对阵列天线辐射特性的测量采用了标准线极化天线比较法。实验结果表明：在3.8～4.2 GHz的频率范围内天线增益大于19.7 dB，口径效率大于42%，天线轴比小于4 dB，驻波系数小于1.6；实验结果与数值计算结果基本一致。

Experiment research of high power helical array antenna fed from double-layered radial waveguide

The helical array antenna fed from radial waveguide is a kind of new antenna to realize the directional radiation of high power microwave.In this paper,the optimized simulation result of a helical array antenna fed from double-layered radial waveguide is presented and some experiment researches are developed for an antenna fabricated according to simulated structure.During experiment researches,an impedance converter is designed to connect the standard port with the antenna input port,and the method of comparing with standard linear polarized antenna is used to measure array antenna circular polarized gain.The experiment result shows that,in the range of 3.8 GHz to 4.2 GHz,the antenna gain is over 19.7 dB,the antenna aperture efficiency is over 42%,the antenna axial ratio is below 4 dB and the antenna VSWR is below 1.6.This result shows a good agreement with simulation result.