DocumentCode
1031623
Title
Analysis of Umbrella antenna at the Omega navigation station
Author
Egashira, Shigeru ; Taguchi, Mitsuo
Author_Institution
Dept. of Electronics, Saga Univ. Japan
Volume
33
Issue
12
fYear
1985
fDate
12/1/1985 12:00:00 AM
Firstpage
1401
Lastpage
1403
Abstract
The characteristics of the electrically very small umbrella antenna used for the Omega navigation system are examined by the numerical analysis. The transmitting antenna of height about 
with 16 inclined elements at the Tsushima station is analyzed as an example of electrically very small umbrella antenna. In the analysis the ground is assumed to be a perfectly conducting plane and the Hallen-type integral equation is used. The difference between the calculated input resistance and the measured one is estimated as the earthing resistance. The approximate equation of radiation resistance is derived and the relation between the inclined elements and the antenna characteristics is discussed.
with 16 inclined elements at the Tsushima station is analyzed as an example of electrically very small umbrella antenna. In the analysis the ground is assumed to be a perfectly conducting plane and the Hallen-type integral equation is used. The difference between the calculated input resistance and the measured one is estimated as the earthing resistance. The approximate equation of radiation resistance is derived and the relation between the inclined elements and the antenna characteristics is discussed.Keywords
Radio navigation antennas; Umbrella antennas; Antenna measurements; Antenna radiation patterns; Electric resistance; Electrical resistance measurement; Grounding; Integral equations; Navigation; Numerical analysis; Sea measurements; Transmitting antennas;
fLanguage
English
Journal_Title
Antennas and Propagation, IEEE Transactions on
Publisher
ieee
ISSN
0018-926X
Type
jour
DOI
10.1109/TAP.1985.1143535
Filename
1143535
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