A coating can be applied to wires or to both sides of a conducting face.
A coating can be applied to a face under the following conditions:
One side must have free space.
The other side must have free space or PEC.
Figure 1. Coatings are applied to both sides of conducting surfaces.
The following coating thickness requirements apply when using the MoM / MLFMM, PO or RL-GO solution
methods:
Solution Method
Coating Thickness Requirement
CO Card Equivalent
MoM / MLFMM
Both electrically thin and geometrically thin
Electrically thin surface coating
MoM / MLFMM
Electrically thick, but geometrically thin (single layer).
Note:
Only for closed structures with a PEC surface and the
normal vector pointing towards the source(s).
Coating is applied to both sides of the PEC surface,
since fields will be zero where there is no
sources.
Dielectric / magnetic surface coating (single layer)
PO
Electrically thick, but geometrically thin
Dielectric / magnetic surface coating
RL-GO
Both electrically thick and geometrically thick
Dielectric / magnetic surface coating
Note: A geometrically thin coating must be thin relative to the triangle size
(and as a result also to the free space wavelength) as well as the curvature radius
of the surface.