Concept Design of 15m class Light Weight Deployable Antenna Reflector for L-band SAR Application

In recent years, Japan Aerospace Exploration Agency (JAXA) has been researched and developed next generation SAR satellites. For the next generation SAR program, combination of a digital beam forming technique and a large reflector is required to satisfy the performance requests, wide swath and high resolution. For this purpose, 15 meter class L-band large deployable reflector concept design study was conducted. As a result, lighter reflector design concept is established. Deployment analysis and cable network equilibrium analysis by using flexible multi-body dynamics simulation software are conducted to confirm the design feasibility. In addition, assurance method of surface accuracy is studied. The error factors of the surface accuracy measurement due to gravity are identified and guidelines for accuracy assurance in manufacturing phase was obtained.