If u intend to use vs POLYPHASE filter in order to make SSB u must take care also
I/Q mod.
I did it in ADS vs HB.
general idea in my design was:
Single ended signal was transformed in to the balanced (balun), after that u have PolyPhase Filter and after that u put IQ mod model (i don't have it so i built it also).
These are used at a low enough frequency that any SPICE type simulator can be used. If you want to be more accurate you can put a small inductor in series with the capacitor (in the simulation) to take care of SRF.