宽带高功率贴片天线优化设计与实验

研制了中心频率为300 MHz的宽带高功率贴片天线,并进行了高功率实验研究。采用Taguchi全局优化算法对双层贴片天线的结构参数进行优化设计,使其驻波比小于3的带宽达到60.2%,最大增益8.1dB。为提高其功率容量,对贴片、介质基底和馈电结构进行了改进和相应的绝缘设计。小信号测试结果与理论计算吻合,实测带宽达到64.2%。高功率实验中,馈入峰值89 kV和-81 kV的双极的脉冲,辐射因子达到75.2 kV,等效峰值辐射功率为188.5 MW,辐射场频谱的3 dB带宽为46%,实测能量方向图与模拟结果相符,半能量角宽约为90°。

Optimal design and experiment on high power wideband patch antenna

A 300 MHz-center frequency wideband patch antenna has been developed for high power wideband electromagnetic (EM) pulse radiation, small signal test and high power experiments were performed. The two-layer-patch antenna structure was optimized by Taguchi global optimization method associated with EM simulation software, 60.2% impedance bandwidth (VSWR<3) and 8.1 dB maximum gain were obtained in the simulation, and then insulation design was performed to enhance the antenna’s power capability. The measured S11 in the small signal experiment matches well with the simulated result, and the measured impedance bandwidth reaches 64.2%. Fed by the 3 ns-long bipolar pulse with -89 kV/+81 kV peaks in high power experiments, the radiation factor reaches 75.2 kV with 46% percent bandwidth of the rad