Subarray pattern control and null steering for subarray antenna systems
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United States of America Patent
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-
Jan 20, 1981
Grant Date -
N/A
app pub date -
Sep 7, 1979
filing date -
Sep 7, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Improved performance of an electronically scanned subarray antenna system is realized by tailoring the subarray pattern in a manner that reduces the undesirable effects of illumination truncation at the edge of the main array. This is accomplished by introducing variable attenuators into individual feed elements to effect an illumination intensity taper of the feed element array output. The improvement permits effective utilization of deterministic and adaptive nulling at both the main array and the subarray levels and further provides a system ability to scan over wide spatial angles with wide bandwidths and low sidelobes. The technique is adaptable to both space fed and constrained subarray antenna systems.
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