Failure diagnosis for time-modulated arrays based on compressed sensing

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 $l_0$/$l_2$-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.

Keywords:

• Array failure
• compressed sensing
• convex programming
• time-modulated arrays

Disclosure statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been corrected with minor changes. These changes do not impact the academic content of the article.

Additional information

Notes on contributors

Guo Bai

Guo Bai received the B.E. degree in electronic information science and technology from the Chengdu University of Information and Technology, China, in 2019. He is currently pursuing the Ph.D. degree in philosophy with the School of Physical Science and Technology, Southwest Jiaotong University, China., His research interests include antenna array diagnosis algorithms, array synthesis algorithms, computational electromagnetic and electromagnetic optimization algorithms.

Cheng Liao

Cheng Liao received the Ph.D. degree in electromagnetic fields and microwave techniques from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 1995. From 1997 to 1998, he was a Visiting Scholar at the City University of Hong Kong, Kowloon Tong, Hong Kong. He became a Professor with Southwest Jiaotong University, Chengdu, China, in 1998. His research interests include high-power microwave technology, computational electromagnetic, and antenna.

You-Feng Cheng

You-Feng Cheng received the Ph.D. degree in radio physics from the University of Electronic Science and Technology of China, Chengdu, China, in 2018. In 2017, he joined the Mechanical Engineering Department, University of Houston, Houston, TX, USA, as a Visiting Scholar. In 2018, he joined Southwest Jiaotong University (SWJTU), Chengdu, China. He is currently an Associate Professor with the Institute of Electromagnetics, SWJTU. He has authored or coauthored more than 40 peer reviewed papers. His research interests include phased arrays, reconfigurable antennas, low-RCS antennas, array analysis and synthesis, and evolutionary algorithms.

Yuanzhi Liu

Yuanzhi Liu Yuanzhi Liu received the B.Eng. degree in electronics from the Chengdu University of Information Technology, Chengdu, China, in 2019, and the M.A.Sc. degree in electrical and computer engineering from the University of Ottawa, Ottawa, ON, Canada. He is currently pursuing the Ph.D. degree in electrical and computer engineering with the University of Toronto, Toronto, ON, Canada. His research interests include antennas, computational electromagnetics, and RF/microwave circuits.

Ju Feng

Ju Feng received the Ph.D. degree in electromagnetic field and microwave technology from Southwest Jiaotong University, Chengdu, China, in 2014.,She is currently an Associate Professor with the Institute of Electromagnetic Field and Microwave Technology, Southwest Jiaotong University. Her major research interests include antenna theory and design, computational electromagnetics, and electromagnetic wave propagation.

Xuanming Zhong

Xuanming Zhong received the Bachelor's and Master's degrees from Southwest Jiaotong University, Chengdu, China, in 2003. Since 2012, he has been an Associate Professor with Southwest Jiaotong University. His research interests include high-power microwave technology, computational electromagnetic, and antenna.