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Yes, a good check is to see what the electric field is doing at the port. Does the electric field vectors/or 2D plot look sensible? Another check is to increase the dimensions of the port and compare the results/impedance to what you got before, is the error small, if so the first port size is...
polar simulation impedance
Thanks for the advice. TXline is good for coupled lines on the same plane, however, I did use CST with a short length of line (performing a port mode calculation only)and a very fine mesh to obtain good results.
simulating even mode impedance in ads
Can anyone advise me if they have had luck in simulating the odd and even mode impedances of parallel coupled stripline ( with a top and bottom ground plane as per stripline). CST gives values that I dont completely trust.
Are there any open source...
8.34db broadband coupler
The following paper discusses a coupler that I would like to make but doesnt seem to give clear instructions form a designers point of view.
"Improvements in ultra broadband TEM coupler design" IEE proceedings vol.139 No2 April 1992
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