Fast-transient coupling through a shielded cable penetration

Abstract

Fast-transient electromagnetic (EM) coupling to the interior of a shielded region through a shielded cable penetration is considered. A transient EM field couples through the shield of a coaxial cable into the cable interior and then propagates into the region beyond the shield termination. We calculate the total current and charge per unit length induced on the shield by the incident field, and the resulting current and voltage induced in the interior of the cable. We then evaluate the electromagnetic field and the current carried by the center conductor into the region beyond the shield termination. Representative numerical results are presented to illustrate the analysis.