Estimate of photons/electron/cycle for radio antenna?

Should it be straightforward to estimate the number of radio wavelength photons emitted per electron per cycle (or is it number of electron cycles per photon) of a half wavelength radio antenna running at 100MHz and 1000 watts power output? Is it many photons per cycle per electron or is it many cycles per photon per electron? Or how far does the typical electron "travel" up and down the antenna before it emits a photon? Here there are 100,000,000 cycles per second.

Hope I'm clear.

Thanks for any help!