Electromagnetic field radiated from broadband signal transmission on power line carrier channels

A rigorous procedure is presented for the evaluation of the rectangular components of the electromagnetic field radiated by excited carrier channels on multiconductor overhead power lines above a lossy ground. The proposed full wave approach, based on the use of Hertz potentials, allows the high-frequency analysis of a spread spectrum transmission system. Field sources are the current traveling along the line, which are evaluated by means of an accurate line simulation model including the ground return parameters, obtained by removing the Carson quasi-static hypotheses. The frequency-spectra and the lateral profiles of the field components radiated from wire-to-ground and wire-to-wire channels on a three-conductor distribution line are computed in a frequency-range up to 20 MHz