Coaxial feeding in patch antennas using cst v.2016

hi, i am new to CST. Can anyone help me in modeling coaxial feeding in patch antenna.
I can design patch,substrate, ground and after that i need help,
plz someone explain it in detail.
Thanks

You can find coaxial dimensions online like rg402 and such. From that dimensions you can draw a core, insulator and shielding. Be sure that shielding is touching ground plane and the core is touching radiating patch.You can use teflon as an insulating material.only the core needs to go through substrate.