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The tallest of the tall poles for space communications like AMZN's Kuiper is ironically on the ground. The antennas need to (1) track moving satellites; (2) be capable of dealing with millimeter wave frequencies and (3) be affordable to enough customers. cnbc.com/2019/04/05/jef…
Remember your geometry. The antenna's aperture looks smaller when viewed at the angle created when a satellite is first available to communicate and when about to leave. Look at the jobs posted on the Kuiper web site and you prominently see: senior and junior antenna engineers.
There are good reasons why communications systems started out at lower radio frequencies. But easy to use spectrum is occupied and more hertz are needed anyway. Millimeter wave frequencies involve tradeoffs that require new technological approaches.
