Radio noise fields generated by corona streamers on a power line

A theory of the radio noise field generated by corona on a single conductor transmission line with an earth return is presented. Each corona streamer is modeled as an electric dipole driven by a current pulse. The electromagnetic fields generated both directly by the corona streamers and by the currents induced on the transmission line by the streamers are calculated. The equivalent vertical electric field (after averaging over the ‘random’ properties of the corona and assuming a perfectly conducting earth) is then calculated and compared to the commonly used quasi‐static approximation to this field. For points electrically close to the conductor, the equivalent vertical electric field decays more rapidly than predicted by the quasi‐static theory. In the far field the opposite is true.