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
Link To Document :
