Below pictures are my design of a transmission line, for this simulation I set driven terminal. As you can see one side of the transmission line is differential pairs, another is single ended. If I want to see insertion loss of the transmission line how should I set the rectangular plot? Set "Show" to terminal and see St(Tline_T1,Tline_T3) and St(Tline_T2,Tline_T3) respectively? or set "Show" to differential pairs to see St(Diff1,Tline_T3)? or other?
Is it St(Diff1,Diff1) for return loss?
yes S(diff1,diff2) reflection coefficients for differential pair.
you have to make a differential pair for the waveport (for example) and then S(diff1,diff2) will be the reflection cofficients for the differential pair
Muhammad Faisal Bashir
Hi, Thanks for your answer, the problem is there is no "diff2", as one end is single-ended another end is differential (it's a balun network).
ok. I got your point. Then I would suggest not to make a differential pair. S21 and S31 are to be calculated. That will be insertion losses. Port 2 and Port3 will have equal magnitude and 180 degree phase difference.
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