MAST ROTATIONS AND THEIR EFFECT ON ANTENNA PERFORMANCE

摘要

Digital television (DTV) antennas are often mounted on tall guyed masts; these are relatively flexible structures and will deflect and rotate under wind loading. Rotation of a DTV antenna will alter the population coverage and time availability of the broadcast signal. This paper presents a methodology for the assessment of the effect of guyed mast rotations under along-wind loading on the performance of broadcast antennas. The method is illustrated by application to Winter Hill Mast (north of Manchester) which, at the time of the study, has the greatest population coverage of any TV broadcast structure in the Arqiva portfolio.