HFSS and induced currents

Hello experts,

I want to simulate the radiation of a loop excitated by an induced current. I mean, there is current around the loop with a given frequency, and the loop should radiate consecuently.

I tried to simulate this problem with a "driven modal" solution, but I got no logical results.

Any idea? I think this is a classic radiation problem and quite easy to solve by hand, but It′s really difficult to simulate.