It looks like the space datacenters will be the next competition area for the space industry. I would like to make my proposal for a novel datacenter satellite design.
Data centers need processing power and energy. The highest efficiency electronics can be manufactured on Gallium nitride (GaN) wafers due to their high electron mobility compared to Silicon. Additionally, highest efficiency solar cells are built on GaN for the same reason. Finally, Gallium nitride technology is more resilience to radiation than silicon. My proposition is to combine the solar cells and the processors (including memory and other supporting chips) into one wafer. Some parts of the wafer would produce electricity from sunlight; the other regions would do the calculations. There is no need to cut the wafers into smaller pieces. The chips would be distributed around the wafer for a higher production yield rate. Like in the modern processors, if a section of the chip is faulty that part would be disabled in operation. GaN is also used to manufacture lasers. The communication within the wafer can be conducted by wires but inter wafer communication can be done using lasers which would be a part of the wafer as well.
The datacenter satellite would have a design similar to Starlink satellites, folded flat panels mainly. The bottom section would be responsible for the navigation and communication of the satellite and would be made of standard electronics and solar panels. The satellite would be deployed to the sun synchronous orbit to receive continuous sunlight, negating the need for bulky batteries.
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