Planar Multilayer Substrate Limitations
A number of limitations apply when using the planar multilayer substrate (infinite or finite).
Tip: A finite planar multilayer substrate is a multilayer substrate confined
to a region.
| Solution Method | Planar Multilayer Substrate | |
|---|---|---|
| Infinite | Finite | |
| MoM (SEP) | Yes | Yes |
| MoM (VEP) | No | No |
| MLFMM | No | Yes |
| FEM | Yes | Yes |
| FDTD | No | No |
| PO | No | No |
| LE-PO | No | No |
| RL-GO | Yes (if confined to the uppermost layer of the substrate) | No |
| UTD & faceted UTD | No | No |
| ACA1 | Yes | Yes |
| Low-frequency stabilisation for MoM | No | No |
| DGFM2 | No | No |
| Periodic boundary conditions | No | No |
| CBFM3 | No | No |
| Cable modelling | No | No |
| MFIE, CFIE | No | No |
Media
The following media types are not supported in conjunction with the planar multilayer substrate:
- Dielectric and magnetic cuboids
- Windscreen and layered dielectrics
Ports and Sources
The following ports and sources are not supported in conjunction with the planar
multilayer substrate:
- Waveguide port
- Spherical mode source
- Solution coefficient source
General Restrictions
The following restrictions apply when using a planar multilayer substrate:
- A reflective ground plane in the model is not supported in conjunction with
a planar multilayer substrateNote: A ground plane may be defined in the layers of the planar multilayer substrate.
- A mesh element must be located within a single layer of the planar multilayer.
- A mesh element may not intersect a ground plane in the planar multilayer.
- A dielectric triangle may not lie on the interface (boundary) between substrate layers.
- An aperture triangle must coincide with a planar multilayer substrate PEC ground plane.
1 adaptive cross-approximation method
2 domain Green's function method
3 characteristic basis function method