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Thanks, both. Your suggestions really helps a lot.
I will try de-embedding of discrete ports follow Johnjoe's suggestion.
Regarding cutting PCB, I can try it and I believe it does't affect antenna gain and radiation pattern. However, I also want to see the current distribution of whole PCB...
Both, can you describe in detail about how to do deembedding from S-parameters to get more accurate results when doing simulation with discrete ports?
BTW: I'm simulating a GCPW feed monopole antenna, and this antenna locates inside of a large PCB, this is why the CPW feedpoint is not at the...
Thanks a lot for all your comments, guys.
After some study, I have below findings, please check them and feedback with your valuable comments.
1. Discrete port for wavegudies such as microstrip and CPW is defined in CST tutorial section 'discrete port overview', as shown in fig4.
I'm not sure...
I changed CPW to Microstrip line, and this problem disappeared. Port mode and impedance calculation is no problem, no matter where I set waveguide port.
Any idea or comment is appreciated.
I'm now try to calculate grounded CPW impedance using CST. I added waveguide port according to tutorial section 'Wveguide Port Overview'.
If the port is in boundary plane (shown in fig1), port mode shows normal QTEM mode and the calculated impedance is accurate.
However, if the port is located...
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