Abstract
On-orbit beam reconfiguration and beam scanning are the two most important features for future satellite antenna payloads. There are several ways of achieving the desired flexibility using different types of antennas and different scanning methods. This article presents single- and dual-reflector antenna systems where reconfiguration is achieved using high-gain multiple beams (HGMBs) employing imaging reflector configurations. Beam scanning over the global coverage is achieved using a combination of precise electronic scanning over a small coverage region and a coarse mechanical scanning over a wide global coverage. This method results in significant improvement in gain relative to conventional methods that employ element beams and can simultaneously provide both HGMBs and wide-area coverage beams with low-cost payloads.
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