Time-Domain Analysis of a Large EMP Simulator

The purpose of this paper is to determine numerically the transient electric-field distribution in an EMP simulator. The simulator is composed of three flat-plate transmission-line sections which are approximated by thin wire structures. The problem is treated in the space-time domain using an integral equation which is solved by numerical techniques. The transient electric field is determined in the conical and working regions. The nonuniformity of the field amplitude, the presence of transversal components with noticeable amplitude, and the rise-time variations are analyzed. The influence of some parameters, e.g., the number of wires, is also studied.