FDTD Computer Program

Summary

This chapter discusses that the computer program “EMPSIM.F' is full‐wave three‐dimension in space and one dimension in time. The computer code utilizes the finite‐difference time‐domain numerical method for the implementation of Maxwell's equations for simulating an electromagnetic pulse (EMP) environment. The simulation space is truncated by a perfectly matched layer boundary condition. The simulation setup starts with the charging of an uncharged capacitor bank, which upon switch‐closure drives a transverse electromagnetic (TEM)‐cell consisting of a conical TEM section followed by a test‐volume terminated through a resistive sheet. For the purpose of illustration, the simulation data obtained by running the computer program “EMP Simulator'. The users can change the EMP environment by changing the charging and discharging time of the capacitor bank, switch closure time, and the device under test.