Simulation of the interaction of an electromagnetic pulse with a cylindrical structure by a current injection technique

A test method which creates a current on a cylinder similar to that produced by coupling with an electromagnetic pulse is outlined. Condensers are discharged at the ends of a cylinder placed above a mass plane. Modeling, based on line theory, enables optimum coupling configurations for generators to be determined, and surface currents at different points to be calculated. A method for analyzing surface currents, which decomposes the signal into a sum of sinusoids representing the resonance frequencies of the structure, is presented. Tests show that the method can be used to test assemblies which have cabling. It gives results comparable to strip line tests, but is much simpler.