NDLI: A Multibeam Cassegrain Antenna

Content Provider	IEEE Xplore Digital Library
Author	Gniss, H. Zocher, E.
Copyright Year	1975
Description	Author affiliation: Forschungsinstitut für Hochfrequenzphysik, D-5307 Wachtberg-Werthhoven, W. Germany (FRG) (Gniss, H.; Zocher, E.)
Abstract	This paper deals with generation of a multibeam pattern for three-dimensional radar surveillance by a stacked feed horn system installed in a Cassegrain antenna. Although its effective f/D-ratio is relatively high compared with the corresponding one of the primarily feed paraboloid, lateral displacement of feed horns in the focal plane results in strong pattern distortion caused by phase errors in the aperture plane. Investigations show that by means of an additional axial defocusing the quadratic term of these phase errors can be compensated improving the pattern distinctly, whereas the so-called Coma side lobe remains nearly unaffected. Basing on these results a feed horn system fulfilling special requirements was optimized and constructed. The obtained multibeam pattern of the Cassegrain antenna for the receiving case and the sectoral pattern for the transmitting case are shown.
Starting Page	466
Ending Page	470
File Size	4597065
Page Count	5
File Format	PDF
DOI	10.1109/EUMA.1975.332115
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1975-09-01
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radar antennas Phase distortion Apertures Horn antennas Antenna feeds Surveillance Receiving antennas Transmitting antennas Spaceborne radar Antenna radiation patterns
Content Type	Text
Resource Type	Article

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