DocumentCode
1173742
Title
A Radio Range Beacon Free from Night Effects
Author
Chinn, Howard Allan
Author_Institution
Formerly, Round Hill Research Division, Massachusetts Institute of Technology, South Dartmouth, Mass.; At Present, Columbia Broadcasting System, New York City
Volume
21
Issue
6
fYear
1933
fDate
6/1/1933 12:00:00 AM
Firstpage
802
Lastpage
807
Abstract
A radio range beacon, suitable for the guidance of aircraft along established airways, which is entirely free from atmospheric variations or "night effects", is described. Advantage is taken of the phenomenon that waves of frequencies higher than 30 megacycles per second, or thereabouts, are not usually refracted back to the earth by the Kennelly-Heaviside layer. Multiple path transmission, variation in signal intensity and in polarization are thus avoided. A four-course aural beacon operating on 34.6 megacycles per second was employed for the experimental work. Results and applications are discussed.
Keywords
Aircraft; Atmosphere; Atmospheric waves; Broadcast technology; Cities and towns; Earth; Frequency; Polarization; Radio broadcasting; Radio transmitters;
fLanguage
English
Journal_Title
Radio Engineers, Proceedings of the Institute of
Publisher
ieee
ISSN
0731-5996
Type
jour
DOI
10.1109/JRPROC.1933.227790
Filename
1685391
Link To Document