Use the ideal electrically short <Hertzian dipole>, $d\ll\lambda$, with negligible ohmic loss. Far-field statements additionally require an observation distance large compared with the <wavelength> and source dimensions. These assumptions distinguish its radiation from near-field coupling and from scattering by a general extended antenna structure.

Solution

Past exam of the optics and electrodynamics course of the University of Cambridge / 2018 / Section B / B3 / Solution

 Solution (source code)