Hi,
I am not interested to generate specific mode in GCPW except a quasi TEM mode. I am planning to use the GCPW as a broadband transmission line (5GHz to 40GHz)
Second: should I define any mesh operations?
Also, if the rectangle that defines the Wave ports are such that they are connecting the central line, the 2 ground planes on top of the substrate and the ground plane on the bottom, then I obtained the follwoing:
[error] Port refinement, process abc3d died unexpectedly.
My question: WHY?
If I adjust the ports so they are only connected to the top metallic layers, then it "works": no error message.
However, the direction of H field lines and the amplitude do not make sense?
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About the ports setting of CPW, you can find a lot of introductory materials in this forum. For GCPW, the rectangular port need touch the lower-layer ground metal plane. You are using waveport, and some errors occured, I think the problem may come from the width of the port is too big, and also I strongly recommend that you can define the integration line which is parallel with the lower-layer ground plane at the gap.
About the mesh refine, since you are interested in the quasi-TEM mode only, no consideration of the higher mode, and you treat it as general transimission line, so your interest is just the characteristic impedance Z0, am I correct? In this case, you dont need a huge ground plane and huge computational domain, so no need to do mesh refinement.
I didnt read ur model yet, about just the general information.
Best Regards,