A Novel Design Method of Redundancy Ring for High throughput Satellite

High throughput satellites have some gateway stations to manage beams. In traditional high throughput satellite forward link and backward link, there are both two-cascade redundancy rings using microwave switches to switch gateway stations and on-board equipments separately. This traditional method will use many switches and have high input and output insertion loss, so, the output power will decline and noise figure is a bit high. In this paper, we propose a novel design method for switch redundancy ring which can overcome the defects. This method which has been applied in some Ka band high throughput satellite can enhance forward link G/T by 0. 72dB and backward link EIRP by 0. 55dB, can also enhance forward link throughput by 4.27%. It can also promote satellite competitive.