DocumentCode :
1038053
Title :
Performance of offset prime focus reflectors as a function of feed orientation
Author :
Prasad, K.M. ; Shafai, Lotfollah
Author_Institution :
Dept. of Electrical Eng., Univ. of Manitoba, Winnipeg, Man. Canada
Volume :
35
Issue :
6
fYear :
1987
fDate :
6/1/1987 12:00:00 AM
Firstpage :
736
Lastpage :
739
Abstract :
Radiation characteristics of the offset paraboloidal reflectors illunminated by a tilted prime-focus feed are studied employing the physical optics current method. A family of curves is generated which indicates the optimum orientation of the axis Of the feed for maximum antenna efficiency as a function of the offset angle 
and the half-angle 
subtended by the rim of the reflector at its focus. A comparative study on efficiency and sidelobe levels is presented for different excitation angles of the feed axis.
and the half-angle subtended by the rim of the reflector at its focus. A comparative study on efficiency and sidelobe levels is presented for different excitation angles of the feed axis.Keywords :
Offset reflector antennas; Reflector antenna feeds; Reflector antennas, offset; Antennas and propagation; Apertures; Dielectrics; Dipole antennas; Electromagnetic propagation; Electromagnetic scattering; Feeds; Microstrip antenna arrays; Microstrip antennas; Phased arrays;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1987.1144168
Filename :
1144168
Link To Document :
