Design and experiment of portable Blumlein line

A layer-wound mylar dielectric parallel-plates Blumlein line has been developed, which adopts S-type layer winding and is 50 cm18 cm12 cm in size. Its characteristics of high voltage insulation and output pulse were studied. The results simulated using equivalent circuit by PSpice software, consist with the results of experiment. It is found that the increase in switch inductance reduces the rise time of output pulses and distorts the output pulse shape, introducing reflections as well. The parasitic impedance causes some power loss in the line as the output pulse amplitude is lower than expected. The Blumlein line can deliver a maximum output of 50 kV to a matched load with duration of 180 ns and rise time better than 50 ns.