DocumentCode :
1026968
Title :
Directivity of planar array feeds for satellite reflector applications
Author :
Rahmat-samii, Yahya ; Lee, Shung-wu
Author_Institution :
California Institute of Technology, Pasadena, CA, USA
Volume :
31
Issue :
3
fYear :
1983
fDate :
5/1/1983 12:00:00 AM
Firstpage :
463
Lastpage :
470
Abstract :
Array-fed reflector antennas are used extensively in today\´s contour and multiple beam satellite antennas. To determine the directivity of these antennas theoretically, the total radiated power of the array feed must be accurately computed. In this paper, a closed-form expression for the radiated power is obtained for arrays with the well-known (\\cos \\theta)q -type element patterns. The formulation is general, and takes into account polarization, nonsymmetric E - and H -plane element patterns, nonuniform element spacings and arbitrary complex excitation coefficients. Selective numerical data are presented to demonstrate the usefulness of this result. Comparisons are made with the available results obtained using direct numerical integration techniques, and with other available data based on less general formulations. Excellent agreement is observed for all cases. In particular, data are presented on the directivity of seven-element cluster feeds used in multiple beam designs, and an array feed for producing a contour beam covering the United States Eastern Time Zone (ETZ).
Keywords :
Planar arrays; Reflector antenna feeds; Satellite antennas; Antenna arrays; Antenna feeds; Antenna theory; Geometry; Pattern matching; Planar arrays; Polarization; Reflector antennas; Satellite antennas; Shape control;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1983.1143061
Filename :
1143061
Link To Document :
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