Dispersion diagram of microstrip transmission line in CST MWS

Hi All,
Long time I am trying to get dispersion diagram (alpha/k0 and beta/k0) of microstrip transmission line (MTL) using Eigenmode solver in CST MWS, but I could not find it. Is there any way to get the dispersion diagram from CST Eigenmode solver directly? Specially for half-width MTL or CRLH transmission line. I went through the tutorial of CST and I simulate one CRLH unit cell of a published paper got only the right handed characteristics (phi vs beta). Would you please help me for finding both of them (RH and LH)? Which frequency mode should I use (1 or 2)? I dont have any idea how to plot the alpha/k0 curve. If you know please help me for this as well.

Thank you in advance.