A Measurement of RF Field Intensities in the Immediate Vicinity of an FM Broadcast Station Antenna.

摘要

An FM broadcast tower was surveyed to determine the radiofrequency exposure levels to which personnel working on such towers would be exposed during such tasks as painting,beacon replacement,repairs to de-icing equipment,antenna adjustment,and tower rigging and replacement. High intensity radiofrequency fields in excess of 180mW/sq cm were found on the tower. To prevent a worker's exposure from exceeding OSHA standards,he would be allowed to work in this field only 20seconds in each 6minute period. Since this is impractical,it was suggested that tower work be performed only when the transmitter is turned off.