Design and experiments on a kind of high-power coplanar-feed impulse radiating antenna
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摘要: 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。Abstract: 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, the rE value could reach 800 kV.
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Key words:
- high power /
- coplanar feed /
- UWB balun /
- paraboloid reflector /
- impulse radiating antenna
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