Bounding Signal Levels at Terminations of a Multiconductor Transmission Line behind an Aperture

This report develops a technique for bounding the maximum voltages and currents at terminations of a multiconductor transmission line (MTL) located behind an aperture-perforated conducting screen excited by an electromagnetic pulse. The electromagnetic field is coupled through a small aperture to provide the excitation of a multiconductor transmission line behind the aperture. A model is presented in terms of external and internal sources which in turn creates traveling waves on the multiconductor transmission line. The latter transfer energy to the terminations. The energy at a termination is translated to voltages and currents from which the upper bounds are determined. These upper bounds are obtained using vector norms and associated matrix norms. The formulation is presented in the frequency domain and transformed to the time domain to obtain useful upper bounds for transient analysis of multiconductor transmission line geometries with aperture excitation. (Author)