DocumentCode
932217
Title
Large Reductions of VHF Transmission Loss and Fading by the Presence of a Mountain Obstacle in Beyond-Line-of-Sight Paths
Author
Dickson, F.H. ; Egli, J.J. ; Herbstreit, J.W. ; Wickizer, G.S.
Author_Institution
Office of the Chief Signal Officer, Washington, D.C.
Volume
41
Issue
8
fYear
1953
Firstpage
967
Lastpage
969
Abstract
A detailed investigation of the probable mode of propagation in vhf operation over mountain obstacles has been made. Theory indicates that tremendous gains in received signal strength-above those obtained over a smooth spherical earth-may be expected from diffraction over an appropriate knife edge located in the path. Experimental verification of the principles involved is reported. In addition, the fading was found to be small and even essentially nonexistent on certain very long obstructed paths.
Keywords
Antennas and propagation; Diffraction; Fading; Laboratories; NIST; Propagation losses; Receiving antennas; Senior members; Telephony; Transmitting antennas;
fLanguage
English
Journal_Title
Proceedings of the IRE
Publisher
ieee
ISSN
0096-8390
Type
jour
DOI
10.1109/JRPROC.1953.274283
Filename
4051423
Link To Document