Simulation of BALUN in HFSS

For the purpose of training and education, I am looking for
an example of using HFSS to visualize the effect of an
antenna connected directly to a coaxial cable. How to
visualize the external current in the coaxial and see the
difference when connected to a BALUN.
Anyone has a model like this?...Or any ideas?

Anyone?

Hello,

I know this an old post, but do you have such an example?