The Cable Shield is used on interior boundaries to model a braided shield layer that is geometrically thin but does not have to be electrically thin. It represents a discontinuity in the tangential electric field. Mathematically it is described by a relation between the electric field discontinuity and the induced surface current density:

Select an Cable shield type — Tube (the default), Perforated tube, or User defined. By default, the Electric conductivity σ (SI unit: S/m) uses values From material.

Enter a Cable shield radius Rcable (SI unit: m). The default is 2 mm.

Enter a Thickness d (SI unit: m). The default is 0.2 mm.

Enter a Thickness d (SI unit: m), a Number of holes per meter υ (dimensionless), and enter also a Hole radius Rh (SI unit: m). Rh must be greater than d. The default is 0.2 mm, 10, and 0.5 mm, respectively.

Enter a Transfer impedance per meter Ztpm (SI unit: Ω/m). The default is 0.01 Ω/m.

See the Transition Boundary Condition node, Resonance Constraint section, for all settings.

See the Transition Boundary Condition node, Skin Depth Calculator section, for all settings.