need help designing a fractal antenna

I need to design a fractal rectangular dielectric resonator antenna, and even though i got all the "theory" in place, i can't handle the simulation.

I tried cst microwave studio, but i find it rather hard. Any other program i can use ?

I hear people talking about HFSS, but i haven't worked in that either.

Permitivity of dielectric is 6,2
Entry impedance is 50 Ohms
Stationary wave coef. is <=1,5

I could really use some help (a tutorial on the design).

Thanks in advance.