radiation box dimensions in HFSS for a CPW structure

hi guys

i used to work on printed monopole antenna with microstrip line fed. in such antenna the radiation box dimentions is lamda/4 from each surface of the antenna except the one that port is there.

i want to know if it is the same in CPW fed antenna or not?

Duplicate thread
https://www.edaboard.com/thread236595.html