Beamsteering technique to minimize sidelobes due to phase quantization in a phased array antenna
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United States of America Patent
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Mar 20, 2018
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app pub date -
Dec 8, 2014
filing date -
Sep 10, 2014
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Abstract
The Active Electronically Scanned Lens Array design for a phased array reduces the cost of the phased array with minimal sacrifice to array performance. The design replaces transmit/receive (T/R) modules at the front end of the array with low cost and low lost phase shifters. A tradeoff in this design is a periodic phase quantization error that leads to quantization lobes. To reduce quantization lobes, a phase addition approach is presented to break up with the periodicity. In the presented approach, a phase offset is added at a T/R module and then corrected for at each radiating element in the array. The applied phase offset can be either deterministic or random.
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