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Failure diagnosis for time-modulated arrays based on compressed sensing

Author

Listed:
  • Guo Bai
  • Cheng Liao
  • You-Feng Cheng
  • Yuanzhi Liu
  • Ju Feng
  • Xuanming Zhong

Abstract

Time-modulated arrays (TMAs) have a high design degrees of freedom (DoFs) to improve radiation performance, while they are prone to failure due to their hardware characteristics. In this article, we propose a novel technique to diagnose impaired TMAs based on compressed sensing (CS). The TMA diagnosis problem is reformulated as a sparse signal recovery problem at the center frequency and sidebands. Then, a method based on the difference of convex sets theory and sequential convex programming (DCS-SCP) is developed to implement diagnosis for impaired TMAs. Using a small number of far-field measurements at the same position but different frequencies, the joint recovery of the equivalent excitations at the center frequency and sidebands is realized by a mixed $ l_{0} $ l0/ $ l_{2} $ l2-norm minimization method. The numerical simulation and the successful comparison with the state-of-the-art algorithms demonstrate the superiority of the proposed methods in terms of noise robustness and diagnosis accuracy.

Suggested Citation

  • Guo Bai & Cheng Liao & You-Feng Cheng & Yuanzhi Liu & Ju Feng & Xuanming Zhong, 2024. "Failure diagnosis for time-modulated arrays based on compressed sensing," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 38(1), pages 17-33, January.
  • Handle: RePEc:taf:tewaxx:v:38:y:2024:i:1:p:17-33
    DOI: 10.1080/09205071.2023.2270517
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