Theoretical and measured power density in front of VHF/UHF broadcasting antennas.
A simple and easy-to-use model based on more rigorous computations was formulated for the prediction of power density levels in front of dipole array-type VHF (very high frequency) and UHF (ultra high frequency) broadcasting antennas. Measurements on site verified the usefulness of the model. The distance at which the power density begins to exceed 10 W.m-2--the value established by standards as a limit--is roughly 40 m for UHF-TV antennas, 30 m for FM (frequency modulated) radio antennas and 15 m for VHF-TV antennas. Typical average input powers of antennas are 20 kW, 4 kW and 10 kW for FM radio, VHF-TV and UHF transmissions, respectively.
Jokela
K
K
Finnish Centre for Radiation and Nuclear Safety, Helsinki, Finland.
D004781:Environmental Exposure; D005387:Finland; D008962:Models, Theoretical; D011845:Radio / Q000295:instrumentation; D011846:Radio Waves; D013690:Television / Q000295:instrumentation