Is There Rain Fade on 60GHz Wireless Signals?

Many new wireless wire and wireless wire dish customers who are unfamiliar with 60GHz have been asking about rain fade and if it’s a major problem on 60GHz.  So let’s look at the facts.

At 60GHz the biggest problem is actually attenuation from Oxygen.  The O2 molecules in the air absorb the RF energy very efficiently at this frequency.  Therefore link distances tend to be much shorter than hoped for if purely considering Free Space Path Loss.  The losses at 60GHz equate to around an extra 15dB per Km over and above any FSPL.  So what about rain, fog, sleet, snow, mist etc?
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