[MLB-WIRELESS] IEEE Victorian TALK: Gigabit Wireless Systems

Tony Langdon, VK3JED vk3jed at optushome.com.au
Sat May 19 22:30:03 EST 2007

At 09:54 PM 5/19/2007, David Smith wrote:
>Yes, I stand corrected.  My * is obviously not as smart as I thought ;-)
>My only experience is with 24GHz, where water vapour loss dominates.
>The difference in path loss between dry and moist air is quite dramatic
>(e.g. as night falls).

24 GHz is very close to a resonant frequency for water, if I recall, 
hence water vapour being the dominant cause of attenuation on 24 
GHz.  60 GHz is close to resonance for oxygen molecules.

I did look into 60 GHz for a commercial venture a while back, and 
noted the severe attenuation on that band.

73 de VK3JED

More information about the Melbwireless mailing list