一种高功率共面馈电脉冲辐射天线的设计实验

摘要

A kind of high-power coplanar-feed impulse radiating antenna (IRA)is described in this paper.It is constructed of four electrically large coplanar arms,and a 2.1 m diameter paraboloid reflector.To get higher gain,the point feed was fixed at the reflector focus.To figure out the high power feed problem,a kind of new high power balun was introduced,with conical input to 4 points output.The high-power coplanar-feed IRA was fabricated and the farfield was measured.The results show that:with 450 ps pulse width,142 kV peak voltage short pulse input,therEvalue could reach 800 kV.%设计了一种高功率共面馈电脉冲辐射天线.该天线馈源采用双组电大尺寸共面极板馈臂,将馈电点置于焦点处,与直径2.1 m的抛物反射面相配合,实现超宽谱短脉冲的有效定向辐射.提出了一种由同轴输入到4 端输出的高功率馈电巴伦,解决了高功率情况下同轴线到4 馈臂共面馈电问题.对所设计天线进行测试实验,结果表明:在馈电脉冲宽度为450 ps、峰值电压为142 kV时,辐射因子达到800 kV.