Method of Moments (MoM), Only For Shielded Cables

An arbitrary shielded cable can be solved using the combined method of moments and multiconductor transmission line (MoM / MTL) solution method.

Any arbitrary cable path can be defined, and there is no restriction on the cable path’s proximity to a ground plane.

For the combined MoM MTL method, the outer shield is replaced by physical MoM segments.

If a cable is not connected directly to MoM geometry, additional segments are added from the shield to ground. The inner cable cross-section geometry is solved with the MTL. The shield inner current is transformed via the shield transfer impedance, resulting in distributed voltage sources that are applied to the shield segments that are included internally in the MoM part of the solution.

Figure 1. A generic car with a cable harness.