Group delay vs frequency plot in HFSS

This is a standard report in HFSS. in project manager window, right click results->create modal solution data report -> rectangle plot. category group delay primary sweep frequency. done

thank you for your reply. can you explain how to plot group dealy vs frequency for a two antenna system sepated by few cm :)

If you are talking about a model with a Tx and Rx antenna with both in same design then as before and select port1 to port2.