>>9655611https://pdfs.semanticscholar.org/dabc/21fe75eae774644098cf5919cebf8edee0b0.pdf"The radio coverage strongly
depends on frequency and is essentially determined by the
water vapor and molecular oxygen-induced atmospheric
absorptions. For instance, shifting the frequency from 70/80
to 60 GHz decreases the operating range from 3 km to
400 m [1]. This decrease is related to the 16 dB/km peak of
oxygen-induced absorption around 60 GHz"
