hfss for modelling antennas
 

Hi, I'm using Ansoft HFSS for modelling
a half wave dipole, Signal will be 5v 433 Mhz sine
each half is 2.5" long i.e. than lambda/2
I'm just not able to figure out how to get the radiation pattern
Is a radiation boundary necessary?
Do I have to put in insulation between the two halves as well as on the ends?
I've modelled the signal as a current excitation in each end face, is that the right way to do it?
from the above, how do you model a 5v 433Mhz sine wave in HFSS?
Thanks for all your answers