Ideally, you'd mandate wireless usage at 60 GHz. 60 GHz is strongly attenuated by oxygen in the air[0]. In fact some military satellites use it for secure commu

Ideally, you'd mandate wireless usage at 60 GHz. 60 GHz is strongly attenuated by oxygen in the air[0]. In fact some military satellites use it for secure communication between satellites because it's strongly attenuated by the atmosphere[0]. And while you would think that a band that is the most attenuated by oxygen in the air would be the absolute worst for wireless communication, there's oddly a wifi standard that uses it[2] for communication at speeds up to 7 Gbit/s. While the speed is high the range is only up to 10 meters and it doesn't penetrate walls. [0]https://cdn.everythingrf.com/live/atomspheric-absorption_636385398576768972.PNG https://cdn.everythingrf.com/live/atomspheric-absorption_636... [1]https://en.wikipedia.org/wiki/V_band#Uses https://en.wikipedia.org/wiki/V_band#Uses [2]https://en.wikipedia.org/wiki/WiGig https://en.wikipedia.org/wiki/WiGig