An Ultra-light Large Antenna Reflector for Communication Satellites

Abstract

To lower the cost and increase the performance of commercial satellite systems, we are developing larger and lighter antenna reflectors than are currently available. To realize this new breed of reflector antennas, we propose a geodesic cable network system whose backbone is a tendon reinforced deployable frame structure. Two issues are fundamental to realizing a successful structure. One is to design a cable network system that keeps its shape even if the support structure is strongly deformed by in-orbit thermal and vibration disturbances. The other is to design an extremely light weight support structure whose structural behavior is non-linear and that can accept high levels of deformation. The results of a preliminary design consideration demonstrate the feasibility of a large deployable mesh antenna reflector whose aperture is 20m and weight is less than 80 kg.