On-board IF switch and controller for multi-beam communications satellite

This paper describes satellite switch control schemes and hardware implementations of a large-capacity satellite switch applicable to the 1000-kg-class domestic multibeam satellite communications system. Specifically discussed are the newly designed 'cross-point redundancy structure' for IF switch matrices and their control schemes for the controller. Additionally, an outline is presented of CMOS LSI implementation of the controller as well as methods for solving cosmic-ray-induced problems. Finally, it is confirmed that the developed prototype model has enough reliability for a 7-year space operation.