Extended Resistance Matrix Formulation for Radiation Coupling of a Multi-Conductor Transmission Line

This paper proposes a method to extend the resistance matrices of multi-conductor transmission lines (MTL) to model shields. The imperfect shielding effectiveness is modeled with transfer impedance. The radiated emission and susceptibility of quite general MTLs are found to require a full non-diagonal matrix. The full equations with radiation resistance terms, ohmic resistance terms, and shield transfer impedance are derived. The resulting model is validated against published test data.