coupling coeficient with hfss

hi friends,
i am using hfss to simulate cavity filter, but don't known how to simulate the cross coupling ,namely M13 M14 etc. anyone who knows please give me a help
best regards

You may export the S21 parameter to express the coupling coefficient .

add your own function like CC=re(mode1)^2-re(mode2)^2/re(mode1)^2-re(mode2)^2. you can variable the widown width in the simluation. the result should be very linear.

should be
CC=(re(mode1)^2-re(mode2)^2) / (re(mode1)^2
+re(mode2)^2).

Hi, James,

I want to know which mode should i use in order to get the coupling coefficient?

Can I get the coupling coefficients using the eigenmode simulation? If so, does it mean I need to set the number of modes to be 2 in eigenmode?

It costs me much time when I scan s21 curves.

Thanks.

If you incease the number of modes on the wave port, you can easily obtain S21 profiles between different modes.