DocumentCode :
991553
Title :
A high-performance line source feed for the AIO spherical reflector
Author :
Lalonde, L. Merle ; Harris, Daniel E.
Author_Institution :
Cornell Univ., Ithaca, NY, USA
Volume :
18
Issue :
1
fYear :
1970
fDate :
1/1/1970 12:00:00 AM
Firstpage :
41
Lastpage :
48
Abstract :
An aberration-correcting line source feed has been designed, modeled, constructed, and tested in the Arecibo reflector. The feed is a linearly polarized flat wavegnide 40-foot-long array illuminating 700 feet of the 1000-foot-diameter spherical reflector at 318 MHz. The antenna, illuminated by the new feed, yields an aperture efficiency of 70 percent with a peak gain near 56 dB, half-power beamwidth of 16.2 minutes of arc, and sidelobe levels below 4 percent of the on-axis gain. Vignetting losses are approximately 30 percent at the highest zenith angle.
Keywords :
Reflector antenna feeds; Reflector antennas, spherical; Spherical reflector antennas; Waveguide arrays; Antenna feeds; Aperture antennas; Ducts; Frequency; Gain; Helium; Linear antenna arrays; Polarization; Subcontracting; Testing;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1970.1139608
Filename :
1139608
Link To Document :
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