A METHOD OF REDUCING THE FIELD LEVELS AT THE INSTALLATION SITES OF FMRADIO AND TELEVISION BROADCASTING ANTENNAS

The expansion of television (TV) broadcasting networks has required th e construction of new TV stations and the modernization of existing on es. In addition to expanding the reliable reception zone and providing increasing television broadcast coverage to the country, it is necess ary to ensure that public health standards on permissible electromagne tic field exposures for humans are met by establishing safety zones ne ar television broadcast stations, to reduce radiated power levels, to modify the heights and types of antennas used etc. The field levels ne ar a television station can be reduced by changing the geometrical dim ensions and phase distribution of the feed to the transmitter antenna tiers [4, 6]. In this paper the optimization of the radiation characte ristics of the antennas and the efficient use of the radiated power ar e proposed as methods of achieving this goal.