A number of optional parameters are available when using the finite element method (FEM) to solve a region or
regions.
On the Solve/Run tab, in the
Solution settings group, click the Solver settings icon.
On the Solver settings dialog, click the FEM tab.
Figure 1. The Solver settings dialog (FEM tab).
Decouple from MoM (use FEM absorbing boundary condition)
This option removes the influence of the FEM region (the tetrahedral elements and any
conducting surfaces on their boundaries) on the MoM solution. Closed FEM problems (for example,
completely confined by PEC and / or modal port boundaries) are automatically detected and the
MoM solver will be deactivated.
Tip: The decoupling reduces run-time, but is only
valid if the MoM and FEM regions are electrically far apart.
Element order
This option allows you to specify the element order. Use First order only
(reduced accuracy) to reduce the required memory, run-time and accuracy.
Note: It
is recommended to only use First order only if the mesh is already very
fine. For example, to account for highly inhomogeneous media or very complex
geometry.
Solver settings icon.
On the Solver settings dialog, click the FEM tab.