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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/8410
Title: Limits of compensation in a failed antenna array
Authors: Acharya O.P.
Patnaik, Amalendu
Sinha S.N.
Published in: International Journal of RF and Microwave Computer-Aided Engineering
Abstract: In large antenna arrays, the possibility of occurrence of faults in some of the radiating elements cannot be precluded at all times. In such situations, the radiation pattern of the array gets distorted, mostly with an increase in sidelobe level and decrease in gain. Although it is not possible to restore the pattern fully by rearranging the excitations of the functioning elements, compensation methods have been reported in the literature for restoring one performance parameter of the array and making a trade-off on some other parameter. In this article, we have made a study on the tolerance level of this compensation process. One part of the study deals with the thinning in the failed array, that is, to find a limit on the minimum number of functioning elements of the array that can restore the digital beamforming of the failed array. The second part of study deals with finding the maximum number of element failures that can be compensated. The study was carried out by optimizing the amplitude excitations of the failed array. Instead of classical optimization techniques, particle swarm optimization was used for the compensation process. © 2014 Wiley Periodicals, Inc.
Citation: International Journal of RF and Microwave Computer-Aided Engineering (2014), 24(6): 635-645
URI: https://doi.org/10.1002/mmce.20807
http://repository.iitr.ac.in/handle/123456789/8410
Issue Date: 2014
Publisher: John Wiley and Sons Inc.
Keywords: antenna arrays
failed antenna arrays
particle swarm optimization
sidelobe level
ISSN: 10964290
Author Scopus IDs: 35752951000
7102813204
7403739821
Author Affiliations: Acharya, O.P., Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttrakhand, 247667, India
Patnaik, A., Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttrakhand, 247667, India
Sinha, S.N., Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttrakhand, 247667, India
Corresponding Author: Patnaik, A.; Department of Electronics and Communication Engineering, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [ECE]

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