I chuckled at this, because 6 GHz was until recently widely used by the satellite industry (C-band) for ground to spacecraft uplinks. They've had to vacate it a

I chuckled at this, because 6 GHz was until recently widely used by the satellite industry (C-band) for ground to spacecraft uplinks. They've had to vacate it as the spectrum has been re-allocated for terrestrial use (LTE-A, WiFi 6E, etc.). This is a great thing, too - 4-6 GHz is pretty much ideal for terrestrial use. C-band was wasted in space. Ka-band (18-30 GHz) used to be the new frontier for satcom - it was what everyone was excited about the last time I worked in the industry (2014). The advances in mm-wave devices over the last decade are mind boggling.