Medium Frequency Reradiation from a Steel Tower Power Line with and without a Detuner

Measurements and computations of field strengths and tower base currents are presented for a power line section consisting of 5 towers strung with skywires and illuminated by a nearby monopole antenna. This is done first without detuning stubs, and then with detuning stubs on one tower to reduce the re-radiation. Good agreement is obtained between moment-method computations and full-scale measurements. Computational modelling techniques to represent the power line, the detuning stubs and ground effects are given and validated. The beneficial effect of increased stub spacing from the tower leg is identified.