Deep learning based time-domain inversion for high-contrast scatterers

Hongyu Gao, Yinpeng Wang, Qiang Ren, Zixi Wang, Liangcheng Deng, Chenyu Shi and Jinghe Li

Journal of Electromagnetic Waves and Applications, 2024, vol. 38, issue 16, 1844-1867

Abstract: In this paper, a deep learning based time-domain inversion method is proposed to reconstruct high-contrast scatterers from the measured electromagnetic fields. The scatterers investigated in this study include four kinds of geometry shapes, which cover the arbitrary geometrical shapes, handwritings and lossy medium. After being well trained, the performance of the proposed method is evaluated from the perspective of accuracy, noise interference, and computational acceleration. It can be proven that the proposed framework can realize high-precision inversion in several milliseconds. Compared with typical reconstruction methods, it avoids the iterative calculation by utilizing the parallel computing ability of GPU and thus significantly reduce the computing time. Besides, the proposed method has shown the potential to be applied in practical scenarios with experimental results. Herein, it is confident that the proposed method has the potential to serve as a new path for real-time quantitative microwave imaging for various practical scenarios. In the end, the limitation of the method is also discussed.

Date: 2024
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DOI: 10.1080/09205071.2024.2401002

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