modelling reflection in Cadence Virtuoso

Hello Sir,

I have been trying to design a UHF passive RFID  tag in 130nm on Cadence Virtuoso IC 5.4.1. As for the design of a matching network between Antenna and Rectifier of RFID please tell me how reflections, if not matched, been modelled in Cadence Virtuoso. So whether I have to use any specifice ports or libraries  for modelling the net to a transmission line for seeing the reflection due to mismatch.

Thanking you.

Regards,

Jithin