DUAL S- AND KU-BAND TRACKING FEED FOR A TDRS REFLECTOR ANTENNA

摘要

This report presents the results of a trade study designed to identify a synchronous satellite antenna system suitable for receiving and transmitting data from lower orbiting satellites at both S- and Ku-bands simul¬taneously as part of the Tracking and Data Relay Satellite System (TDRSS). The study addresses all related problems associated with maintaining a data link between two satellites with a Ku-band half-power beam-width of 0.4 dB. Specifically, the study addresses data link maintenance techniques, beam pointing accuracies, gimbal and servo errors, solar heating, angle tracking schemes, acquisition problems and aids, tracking accuracies versus SNR, antenna feed designs, equipment designs, weight and power budgets, and detailed candidate antenna system designs.