Simulation of carbon nanotubes

Hello Guys

Can any one help me to simulate and modelling the CNTs on CST or HFSS?
Really, i would like to design patch antenna using CNTs, but i don't know how to model the CNTS using either CST or HFSS.
Can any one help me?

what would be the geometry? tubes forming some sort of patch?

Dear biff44

I want to to design an antenna at any frequency but the problem here; how can i model the CNTs on CST or HFSS. In the case of copper patch, we choose a specific parameters and the model of Copper is included in CST library. Therefore, i want to model the CNTs instead of copper.