基于Marx发生器的紧凑型宽谱辐射源

A compact wide-band source based on Marx generator

摘要:

采用Marx发生器作为脉冲功率源，用螺旋天线作为辐射系统，设计了一种紧凑型宽谱辐射源，用于宽带天线技术研究。充电系统采用24 V锂电池逆变倍压产生几十kV的交流高压，给脉冲功率系统供电。10级Marx发生器设计为同轴结构，最大输出电压200 kV，整个Marx发生器尺寸为ф150 mm×550 mm。Marx发生器产生的脉冲经过辐射系统，最后通过螺旋天线辐射出去。实验结果为：辐射场中心频率为171 MHz，2 m处最大辐射场为10.5 kV/m。

Abstract:

A compact wide-band source based on Marx generator is designed，which is powered by a pair of 24 V,15AH(Ampere-Hour) lead acid batteries, inverted and multiplied to generate high-voltage alternating current(10s of kV). Marx generator is a compact ten-stage coaxial high voltage pulse generator with a total size of ф150 mm×550 mm. With a maximum of 20 kV charge voltage, this generator has an open circuit voltage of 200 kV. The fast voltage pulse generated by Marx source is applied directly to drive a spiral antenna. The experimental results show that the peak E field is 10.5 kV at a distance of 2 m from the radiation antenna, with a center frequency of 171 MHz.