in 1D report section CST always calculate input impedance.
when simulation run finished. it will appears in navigation tree.
I suppose you are wrong.
go to post-processing section and check s-parameter calculation>>always calculate z and y matrices.
then look at z folder in 1d result an navigation tree.
z matrices never change with reference impedance
yes I know that but it differ slightly when i change reference impedance from 10K to 35K, but now i have another problem
when i saw the real part of input impedance in Z-Matrix i observed that in some frequencies the real part is negative, i can't understand it?
if my result is correct then do this:
go to solver setting windows click on special>>choose waveguide tab
then change port mode solver to Generalized and check broadband for inhomogeneous port option
then in solver setting windows check adaptive mesh refinement option.
after all of this you will see my results.