Design Monopole antenna with CST MWS

I have project: Design monopole antenna for Cubesat (UHF and VHF).
I had designed patch antenna, microstrip antenna in CST but I dont design monopole before.
Therefore, I don't know how to fed and matching impedance?
I need some example and document about monopole in CST.
Please help me
Thanks

check here https://www.edaboard.com/thread295107.html#post1262906 post #9

Thanks your help. I have a question. How to calculate matching impedance if my monopole antenna isn't cylinder or other frequency?

To me, analytical formulation is only available for certain shapes of the monopole, you might have to go with a 3D EM simulator in order to obtain input impedance of a arbitrary shape.