Hi Dan.

Thank you for your Wcalc developpment which help my differencial line(couplied microstrip) impedance calcuration lots. It is good tool.
I have question about insertion loss display as Odd mode loss for the couplied microstrip line.
Wcalc calcurate and display the Odd mode loss. I think it would be same with differencial line loss Sdd21. Is my understanding correct?
(Before I guessed Root (Even loss * Odd loss) calcuration may be the Sdd21. But I tried to input very wide S which wouldn't make diffarencial impedance for couplied microstrip lines and it will have Even mode impedace with GND only. But Wcalc Odd mode loss display same with Even mode loss data. So I think the wcalc display Odd mode loss as Sdd21, Bcs Sdd21 include odd and evan mode loss... )

Regards.
Moto