DocumentCode :
1017820
Title :
Radiation from quarter-wavelength monopoles on finite cylindrical, conical, and rocket-shaped conducting bodies
Author :
Fahmy, Mostafa N I ; Botros, Adel Z.
Author_Institution :
Cairo Univ., Cairo, Egypt and Univ. of Riyadh, Saudi Arabia
Volume :
27
Issue :
5
fYear :
1979
fDate :
9/1/1979 12:00:00 AM
Firstpage :
615
Lastpage :
623
Abstract :
A theoretical-numerical technique, based on Maue´s integral equation, is applied for the determination of radiation patterns of airborne antennas comprising one or more quarter-wavelength monopoles, straight or bent, on finite cylindrical, conical, and rocket-shaped conducting airframes. The induced surface currents on the conducting body are first determined whence the total radiation fields are obtained. In the cases of a single monopole on a conducting body, the surface currents and radiation patterns are studied in view of varying the geometrical parameters of the body as well as the position and relative orientation of the monopole. For the case of two diametrically opposite monopoles on a finite cylinder, the effect of varying the relative phasing is studied. A physical interpretation of the variation with various parameters of the surface currents and the radiation fields is endeavored wherever feasible, and important results are concluded. Experimental investigation of radiation from one of the theoretically treated models, namely that of a bent monopole on a finite frustum of a cone, showed excellent agreement with computed results. This establishes the validity of the theoretical-numerical technique as well as the computed radiation patterns for various cases.
Keywords :
Aircraft antennas; Cones; Cylinders; Monopole antennas; Rockets; Space-vehicle antennas; Antenna radiation patterns; Antenna theory; Conductors; Frequency; Impedance matching; Integral equations; Shape; Solid modeling; Surface treatment; UHF antennas;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1979.1142145
Filename :
1142145
Link To Document :
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