Array antenna and a method of determining an antenna beam attribute
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United States of America Patent
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Nov 9, 2010
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N/A
app pub date -
Apr 13, 2007
filing date -
Apr 13, 2007
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Abstract
A method of determining one or more attributes of an antenna beam based on measuring phase and/or amplitude differences at different points in a feed network. Amplitude and/or phase are measured by a probe (13) at an input to a differential variable element (7, 8, 9) and by a probe (14) at fewer than all of the outputs of the differential variable element. By using lookup tables based on actual measurements of antenna beam attributes for phase and/or amplitude differences at different points in a feed network computation may be simplified. The method enables a relatively inexpensive control circuit to be employed while providing accurate measurement of antenna beam attributes.
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