January 1997
Beginner
435 pages
18h 29m
English
Content preview from Microwave and Wireless Communications Technology
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I I I I I I t I J Figure 20-9
5 10 22 50 64 100
Atmospheric absorption of
FFIEQUENCY (GHz) microwave energy.
tion of microwave energy, respectively. Operation of any microwave frequency re-
quires consideration of atmospheric losses, but operation at the two spike frequen-
cies poses special problems. At 22 GHz, for example, about I dB of loss must be
calculated for the system.
Microwave systems are limited in range principally because of the line-of-
sight propagation phenomena. As a result, distances beyond 50 km (approximately ...
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