Identification and localization of defects in shielded cables by a numerical/experimental procedure

A procedure to detect and localize defects in shielded cables is presented. Common defects in cables and shields (short circuit between shield and inner core, crack in the shield, hole in the shield, cross section discontinuities,...) are modeled by equivalent lumped circuit models, which are introduced in a numerical procedure based on the solution of the transmission line (TL) equations. A sensitive analysis is carried out to establish the type of the cable defects that can be detected and localized. The numerical results are then compared by those measured in frequency domain (FD).