Altair Feko: What are the restrictions when using the planar multilayer substrate

Esti
Esti
Altair Employee
edited July 2023 in Altair HyperWorks

This article lists the restrictions and limitations when using the planar multilayer substrate (infinite or finite).

 

image  Tip: A finite planar multilayer substrate is when a planar multilayer substrate is confined to a region.

 

Solution methods and planar multilayer substrates

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

ACA

Yes

Yes

Low-frequency stabilisation for MoM

No

No

DGFM

No

No

Periodic boundary conditions

No

No

CBFM

No

No

Cable

No

No

MFIE, CFIE

No

No

 

The following media are not supported in conjunction with the planar multilayer substrate:

  • Dielectric and magnetic cuboids
  • Windscreen and layered dielectrics

 

The following ports and sources are not supported in conjunction with the planar multilayer substrate:

  • Waveguide port
  • Spherical mode source
  • Solution coefficient source

 

The following restrictions apply when using planar multilayer substrate:

  • A reflective ground plane in the model is not supported in conjunction with a planar multilayer substrate.

image Note: 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.
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