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Journal of Information Science and Engineering, Vol. 32 No. 3, pp. 611-624 (May 2016)


Recovery of Failed Element Signal with a Digitally Beamforming Using Linear Symmetrical Array Antenna


SHAFQAT ULLAH KLHAN1, IJAZ MANSOOR QURESHI2, BILAL SHOAIB3 AND AQDAS NAVEED3
1School of Engineering and Applied Sciences
ISRA University
Islamabad, 44000 Pakistan
2Department of Electrical Engineering
Air University
Islamabad, 44000 Pakistan
3Department of Electronic Engineering
International Islamic University
Islamabad, 44000 Pakistan
E-mail: shafqatphy@yahoo.com; imqureshi@mail.au.edu.pk; {anaveed; bilal.phd42}@iiu.edu.pk

An antenna array element failure problem is one of the practical and challenging issues in the field of adaptive beamforming. The complete radiation pattern of the array is distorted when any one of the elements fails. Sidelobes level increases, nulls are shifted and null depth is also decreased tremendously. In order to mitigate the problem, we have given a new and easy approach coined as conjugate symmetry approach of the array. In this, the failed element is given a conjugate of the output from its symmetrical counterpart element in the array. The Classical Dolph-Chebyshev and Taylor pattern are taken as the test antenna. The simulation results of both patterns show the validity and presentation of the proposed approach.

Keywords: linear symmetrical array, failure correction, array factor, beamforming, sidelobes level

Full Text () Retrieve PDF document (201605_06.pdf)

Received December 24, 2014; revised August 11, 2015; accepted September 29, 2015.
Communicated by Jiann-Liang Chen.