DocumentCode
1240674
Title
Transmitting Antenna with Cosecant-Shaped Vertical Pattern for the 12-GHz Television System
Author
Koch, Gerhard F. ; Thielen, Herbert
Author_Institution
Deutsche Bundespost, Darmstadt, Germany
Volume
22
Issue
9
fYear
1974
fDate
9/1/1974 12:00:00 AM
Firstpage
1391
Lastpage
1393
Abstract
A broadcasting antenna has an optimum performance if a constant electric field distribution within the coverage area is obtained. A constant field strength requires a cosecant-shaped vertical and omnidirectional azimuthal pattern. For this purpose the German Federal Post Office has developed the so-called polygonreflector antenna, consisting of six specially shaped reflectors with horn feeds. Using this device the field strength at the edge of the coverage area is increased by 4.5 dB in comparison with a conventional antenna.
Keywords
Microwave antennas; Reflector antennas; TV broadcast antennas; Antenna feeds; Antenna radiation patterns; Aperture antennas; Horn antennas; Laser radar; Machine vision; Reflector antennas; Shape; TV broadcasting; Transmitting antennas;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1974.1092378
Filename
1092378
Link To Document