Field and Wave Electromagnetics 2nd Edition by David Cheng

Exercise 25

A composite antenna consists of an elemental Hertzian electric dipole of length L along the z -axis and an elemental magnetic dipole of area S lying in the xy -plane. Equal time-harmonic currents of amplitude I 0 and angular frequency flow in the dipoles.
a) Verify that the far field of the composite antenna is elliptically polarized.
b) Determine the condition for circular polarization.