Ground Plane， formula， CST simulation

is there any formula for ground plane that could help me with my design"koch dipole antenna"
I looked everywhere.. through books and articles and i can't find it. it is my first design which relates to antenna.
AND how can i design a koch curve in CST.!

To desing a koch curve in CST you can take advantage of CST macros.
Macros -> Construct -> Curves
You can edit the macro and code the coordinates of the Koch curve points.

dude if u dont mind can u send mr the cst file on koch please my mail id is chandalurisurendra@gmail.com
awaiting for u r response