Simulating Large Electrical Systems for Wideband Pulse Interactions Using the Topological Modular Junction Concept

Experiment and electromagnetic-topology (EMT)-based simulation are performed to study the effects of wideband EM pulses on large electrical systems. The EMT simulation relies on the topological modular junction concept with the simultaneous use of a number of analytical and computational methods, including the transmission-line-matrix compaction method, the finite-difference time-domain method, and the reciprocity theorem, to come up with a final result. The EMT simulation approach that uses the topological modular concept is an effective way to perform tradeoff analysis of different wideband pulse excitations without having to repeat the simulations of the entire system. As part of validating the EMT simulation approach, we performed the experiment to measure the current induced by a wideband EM pulse on a cable behind a slot aperture. The simulated current and the measured current resulted in good agreement with each other, thus demonstrating the validity of the proposed simulation scheme.