DocumentCode :
1033155
Title :
Reducing grating lobes due to subarray amplitude tapering
Author :
Haupt, Randy L.
Author_Institution :
Univ. Michigan, Ann Arbor, MI, USA
Volume :
33
Issue :
8
fYear :
1985
fDate :
8/1/1985 12:00:00 AM
Firstpage :
846
Lastpage :
850
Abstract :
Subarray amplitude tapering is a simple, lower cost method to generate low sidelobes in an antenna´s far-field pattern. Unfortunately, this simple technique also generates unwanted grating lobes. Placing the exact amplitude taper at the element outputs produces the desired far-field pattern, but the feed architecture is complicated and expensive. An alternative to these two techniques is described. A trade-off exists between sidelobe performance and simplicity of design. This trade-off consists of amplitude tapering the subarray outputs and the element outputs in such a way that the element amplitude tapers are identical for every subarray. In this way, the amplitude taper approximates the desired taper much better than subarray tapering alone, yet all the subarrays are identical. Thus, the feed design remains very simple.
Keywords :
Phased arrays; Antenna feeds; Aperture antennas; Bandwidth; Chebyshev approximation; Costs; Gratings; Manufacturing; Phased arrays; Radar antennas; Reflector antennas;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1985.1143682
Filename :
1143682
Link To Document :
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