Stripline simulation by ADS

Hi all

Have anyone ever simulate asymmetric stripline (offset stripline) by ADS?
I have found SSUB and SSUBO functions from ADS and simulate the impedance.
but the simulation result is different to Polar (offse strip 1B1A).

If you have simulation experience or file, please help to provide it for me.

thanks

i think its better to use HFSS .