双脉冲高功率脉冲调制器的设计

Compact high power double-long-pulse modulator

采用螺旋线和折叠线技术相结合的方法,设计了一种基于水介质高功率脉冲调制器。该调制器采用了两个开关,通过控制两个开关的导通时刻,可以在两个负载上得到脉冲长度相等的两个脉冲。对该种折叠型传输线的波过程进行了详细分析,给出了过渡段部分阻抗等参数对负载电压的影响;用Pspice电路软件对脉冲形成线的充电电压和二极管电压、电流进行了模拟;最后利用高压同轴电缆,对该种类型调制器进行了低压情况下的验证实验,实验结果与理论分析、模拟研究一致。此种类型的调制器具有结构紧凑、可同时输出两个脉冲的优点。

A high power water dielectric double-pulse compact modulator has been designed using the folded coaxial transmission line method combined with the spiral line method. With two spiral transmission lines,an air core transformer and two trigger switches,double long pulses could be obtained at each end of the pulse forming line（PFL）. The wave process of the pulse modulator was analyzed. The influences of the transition part of the modulator on the load voltage were also discussed. Pspice circuit was used to calculate the voltage and current at the dummy loads,and the charging voltage of the PFL. Experiments were done using high power coaxial line at 20 kV,and the results are in good agreement with the theoretical analysis and simulation results.