Comparison of random phasing methods for reducing beam pointing errors in phased array

Beamsteering for phased arrays normally causes a pointing deviation of the main beam due to the periodic phase quantization error across the array. This deviation occurs due to the use of digital phase shifters. We modify the random phasing methods into appropriate random phasing methods, in which t...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2003-04, Vol.51 (4), p.782-787
Main Authors: Wei Jiang, Yanchang Guo, Tinghua Liu, Shen, W., Wei Cao
Format: Article
Language:English
Subjects:
Apertures
Arrays
Beams (radiation)
Deviation
Errors
Mutual coupling
Phase shifters
Phased arrays
Phasing
Planar arrays
Probability distribution
Quantization
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Summary:Beamsteering for phased arrays normally causes a pointing deviation of the main beam due to the periodic phase quantization error across the array. This deviation occurs due to the use of digital phase shifters. We modify the random phasing methods into appropriate random phasing methods, in which the accuracy of the pointing direction in phased arrays is improved. The word "appropriate" means that, for the phase quantization error, the rounding to the nearest bit method is not always to be applied, nor is the random phasing method. An appropriate mean phase error equal-to-zero method (AMPEEZ), an appropriate two probable value method (A2PV) and an appropriate phase-added method (APAM) are proposed. These methods are simulated and compared with the nonappropriate ones.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2003.811105