Design and setup of a short pulse simulator for susceptibility investigations

Summary form only given, as follows. The design and first measurements of a half IRA system for susceptibility investigations are presented. The application of interest is the generation of a ultra short pulse with a high electromagnetic field strength. The electromagnetic field needed is radiated by a reflector type impulse radiating antenna driven by a high voltage pulser with risetime less than 500 ps and an output voltage greater than 100 kV. The half IRA was used in order to minimize the field disturbance by the source system.In order to achieve the electric strength of the feed structure and to estimate the radiated impulse, the field distribution was calculated via a TEM-mode model. Due to the required impulse form the necessary transformation of the plane wave inside the coaxial system into a spherical wave was done with the help of a dielectric lens. Based on the calculation field distribution and an estimation of the transfer losses of the lens the radiated field was computed and compared with measured data. We present the computed and first measured field values and discuss the optimization potential of the design.