Keeping antennas at peak performance

Detection of partial faults in antenna array systems could prevent inconspicuous performance degradation in wireless networks.
© Alamy stock photo, Violeta Chalakova

Advanced statistical techniques developed by KAUST researchers have enabled an efficient method for detecting the partial antenna failures that can inconspicuously degrade mobile communications.

Modern antenna systems in mobile devices and transmission towers are increasingly being set up as arrays of antenna elements to increase performance, directionality, bandwidth and safety. For example, by adjusting the phase of individual antenna elements, the radiation pattern from an antenna array in a mobile phone can be directed away from the user for safety, while the radiation pattern from a transmission tower can be concentrated on a specific area for improved coverage.

Major faults in such systems are easily identified due to the sudden loss of wireless connection, but a fault in one element of an array system can be much more difficult to detect. Such partial failures, however, can significantly change the radiation pattern from the array, potentially seriously degrading network performance.

Assistant Professor of Applied Mathematics and Computational Science Ying Sun and her postdoc Fouzi Harrou from the University’s Computer, Electrical and Mathematical Sciences and Engineering Division have now developed an efficient statistical technique to detect individual faults in antenna arrays.

“There is a demand for high-performance antenna array systems in numerous applications, such as radar surveillance, biomedical imaging, remote sensing, radio astronomy and satellite communications,” said Sun. “However, individual antenna elements can develop faults due to the settling of dust particles, poor design, electronic failure, improper use or a shift in the position of the array element during installation. We want to be able to monitor arrays efficiently to identify anomalies that could degrade the performance and reliability of the antenna system.”

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