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A Microwave Propagation Test

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2 Author(s)
Millar, J.Z. ; Western Union Telegraph Company, New York, N.Y. ; Byam, L.A., Jr.

A description is given of a microwave propagation test which was conducted over a period of a year with simultaneous transmission on wavelengths of 16.2, 7.2, 4.7, and 3.1 cm over an unobstructed 42-mile overland path. Comparative charts depict variations in daily fading range, illustrate diurnal and seasonal characteristics of fading, and reveal the marked disparagement between winter and summer fading. Curves are presented showing relative field-strength distribution for both winter and summer periods, and also the distribution of hourly minima. These curves may be useful in considerations bearing on continuity of service that may be expected with relation to wavelength and to time of day, winter or summer.

Published in:

Proceedings of the IRE  (Volume:38 ,  Issue: 6 )