A STUDY OF POWER DISTRIBUTION TO MULTI-BEAM ANTENNA TO COMPENSATE RAIN ATTENUATION FOR BROADCASTING SATELLITE

Abstract

This paper proposes a remedy for the rain attenuation by the use of multi-beam transmitter antenna, and describes how transmitter power is distributed to the individual beam. In order to simulate the rain attenuation, the use of rain data in the meteorological AMeDAS data is made. The rain data are converted to rain attenuation at 21GHz. The transmitter antenna is assumed to have 10 beams of which 3 beams are selected to be supplied additional power. The determination of the selection is made by comparing top 5% of attenuation in each beam, which includes averagely 1300 locations. By the use of this system % time of outage in a year is expected to be reduced to 0.4%, approximately.