This is all ridiculous, there's still a 200 MHz band guard between the FAA band and the 5G proposed band.

Here is what a $1 ESP wifi dongle has to follow:

https://en.wikipedia.org/wiki/IEEE_802.11

"The mask requires the signal to be attenuated a minimum of 20 dB from its peak amplitude at ±11 MHz from the center frequency"

So 2 dB/MHz filter.

I let you do the math.

FAA is just ridiculous here if they let old junk radio hardware handle safety landings for airplanes, but well after 737 max what do you expect...