I am in the process of designing an OMT at lower Ka band (18.1-21.7 GHz).
I'd like to validate the scattering parameters of my design by simulating the OMT with at least two different methods within the CST Suite. I used the transient solver which is based on the FIT method and the TLM solver which is based on the TLM method.
I understand that each solver uses different meshing technique, but that should not have a significant effect on the scatttering parameters (which I am observing), should it?
I appreciate your responses.
Thanks
Hello
You should check the mesh and refine it until you have a stable response.
Both solver should give the same result, especially at such frequency !
Salam
All solvers should in principle agree (wont be exactly the same though). If they are far from each other there is a sign something is not alright. Id recommend increasing the mesh, for both cases, and seeing whether by doing so both curves start to get closer. If they do it was a convergence problem, if they dont there is some other issue.
Play around also with the F solver, to add a third solver. In general both Fit and F (which is FEM) agree.
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