Electric Field Distributions Inside a Large Wire-Array NEMP Simulator by the Time-Domain Moment Method

Abstract

The time-domain moment method (TDMM) is used to calculate the transient electric fields and field distributions inside a large wire-array NEMP simulator. The TEM-mode transmission-line theory and the quasi-static theory are applied in the analysis of electric field distributions inside the simulator. Results of transient electric fields and field distributions for well-matched and mismatched conditions are presented, respectively. In the study of the quasi-static field, it is found that the electric field in the working volume appears without any distortion. In an analysis of the TEM-mode condition, it is found that the distortion wave form of the electric field is greatly affected by the refection coefficients at both the source side and terminating end. But it is also found that the electric field is almost homogeneously distributed inside the working volume of the simulator for both well-matched and mismatched conditions. Outside the working volume, electric field increases as the field point approaches the rims of the simulator.