SPICE-Based Lumped Circuit Model of Shielded Cables for EMC Analyses

This paper presents a SPICE-based network model for a coaxial cable with braided shielding over a ground plane. The model can calculate the voltage response at the loads due to the coupling of plane waves or due to lumped interference sources. The cable is represented as cascaded cells with lumped elements and controlled sources. The cells in the inner and outer system are individually coupled by voltage-controlled sources and the mutual inductance. The model can be used in the frequency domain or in the time domain with non-linear elements. The results agree very well with those that were carried out with field simulations.