antenna design using IE3D

I want to design an antenna element in IE3D.The antenna consists of a pair of folded dipoles.The dipoles are coupling fed by an L-shaped microstrip line.The dipoles are printed on backside of the substrate while the L-shaped microstrip line is etched on the front side of the same substrate and it is fed using a 50ohm coaxial cable.
Can anybody help me with this design..plz..?