HI everybody and leader HFSS

I have tryed a simulation of HIS, for preparing to insert a patch antenna.
But I don't know how to calculer the ρ, (in 0,9 --> 1 may be)
so in my ex, attached here please see and tell me, thanks a lot!

HFSS ver10.1 !pls

hi and here is another one only diffirent the dimension; is it better or not ?
Thanks

so i am waiting ....