Array antennas with independent sum and difference excitations levels
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United States of America Patent
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Apr 18, 2006
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N/A
app pub date -
Dec 16, 2004
filing date -
Dec 16, 2004
priority date (Note) -
Expired
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Abstract
Improved punch-through performance is provided for applications such as sum and difference mode processing for IFF and other applications. With an array including a row of elements, difference sidelobe levels are increased relative to sum sidelobe levels by independently controlling relative signal levels of difference mode signals provided from signals received by central elements of the array. By processing signals from central elements independently from processing of signals from outer elements of the array, difference mode signals derived from the central elements may be employed at higher signal levels in order to raise difference mode sidelobe levels to improve punch-through performance. Antenna systems and methods are described.
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