Design of layer-wound spiral strip dielectric film pulse forming line

A modularized layer-wound spiral stripline was designed using polypropylene as insulation material. The performance of the insulation film and the electrode foil was analyzed. A four-stage stacked Blumlein line based on the stripline operating with four gas switches and a resistance load delivers a quasi-rectangular output waveform at the repetitive frequency of 10 Hz. The stages are stacked in series at one end， and charged in parallel and synchronously commuted with the switches at the other end. In this way， relatively low charging voltages are multiplied to give a high discharge voltage across an arbitrary load. The Blumlein line can output 220 kV pulses with durations of 182 ns， and rising times of 50 ns at the repetitive frequency of 10 Hz.