I have a model in CST2006 feed by the lamped port. When mesh become more complex and dense the solution is wrong, stucture reflect all energy, i.e. output and input signals are equal!
When the grid is small (~20000 cells) the solotion is normal...
With the same grid options in CST 5.1.3 the solution was good, at least it was quite reasonable.
Where is the problem?
Can you guys be more specific in your setup? I have just recently started to use CST, and have not yet encountered this problem (although I have tried).
Are you running a transient or frequency simulation when this occurs?
What kind of problem are you simulating? Is it just a microstrip line or something more complex?
Please explain more detail of your project... from my experien first thing port must be put in a global coordinate, grid should be specify at boundary between two material(manual set up).
Just such a project:
a 50 Ohm stripline with high b=1mm , t=0.017mm ,width=0.6155 mm,
use transient solver ,adaptive mesh refinement.
the error will appear,
s11=1 s21=0 , but port calculation is correct.
I met this kind of problem when I simulated a simple half wavelength of dipole. When the mesh is about several 10K, the results is correct. When mesh reached several 100K, the S11 become 0dB.