Time-domain upper bounds for signals on a multiconductor transmission line behind an aperture

A technique for bounding the maximum voltages at terminations of a multiconductor transmission line (MTL) located behind an aperture-perforated conducting screen excited by an electromagnetic field in the time domain is developed. The electromagnetic field is coupled through a small aperture as the excitation of a multiconduetor transmission line behind the aperture. A model is presented in terms of traveling waves and multiple refleetion phenomenon. These traveling waves transfer energy to the terminations. The energy at a terminatian is translated into voltages from which the upper bounds are determined. The upper bounds are obtained using vector norms and associated matrix norms.