Buried-Object Time-Reversal Imaging Using UWB Near-Ground Scattered Fields

Moghadasi, S. Mahdi; Dehmollaian, Mojtaba

doi:10.1109/tgrs.2014.2311131

Cited by 27 publications

(6 citation statements)

References 21 publications

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“…The major use of time reversal in recent research has used this back propagation of electromagnetic waves for radar applications and medical imaging problems. For radar applications, the use of time reversal has been demonstrated for the imaging of targets in cluttered environments [37], as well as for obscured targets [38] such as through-wall [39] or buried [40] targets. Microwave biomedical imaging is an important development due to its use of non-ionizing radiation and thus TR has been investigated for its use in imaging multi-layered breast tissue phantoms [41], [42], [43].…”

Section: B Time Reversal Imagingmentioning

confidence: 99%

A Microwave Tomography System Using Time-Reversal Imaging for Forestry Applications

et al. 2022

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A healthy urban forest is important to improve both human health and overall environmental quality. There is currently a lack in technology that has the ability to evaluate living trees in their natural environment without invasive destructive sampling. This work presents a cost-effective, real-time microwave tomography system for practical forestry applications. The scattering measurement system is designed using wide band microstrip monopole antennas (1-5 GHz) and coupled to a switching matrix and a controlling software for automated real-time data collection. A time reversal signal processing algorithm is developed for performing imaging, based on the measurements. The imaging system is initially validated by imaging simple cylindrical targets and finally utilized for imaging defects in different tree trunk samples. Preliminary experimental results demonstrate the practicality, novelty and benefits of this approach for forestry imaging applications. INDEX TERMS.

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Section: B Time Reversal Imagingmentioning

confidence: 99%

A Microwave Tomography System Using Time-Reversal Imaging for Forestry Applications

et al. 2022

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“…In terms of signal processing, the UWB Time-Reversal (TR) imaging is a method for remote sensing and imaging applicable for electromagnetics (Moghadasi and Dehmollaian, 2014; Yavuz and Teixeira, 2006). It explores the TR invariance of wave equation in lossless and stationary media, and provides high resolution and statistical reliability.…”

Section: The Limitations and Potential Techniquesmentioning

confidence: 99%

Microwave sensor technologies for food evaluation and analysis: Methods, challenges and solutions

Meng

Gray

2017

Transactions of the Institute of Measurement and Control

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Microwave sensor technology is widely accepted as a non-destructive and hygienic means for food evaluation and analysis. However, its applications concentrate on in-lab investigations, which are not widely applied for on-line measurement in food industry. Motivated by the rapid progress of microwave technologies and the lack of on-line measurement systems in industry, this paper aims to provide a comprehensive overview of microwave sensors for food measurement, define the technological gap, and suggest the potential solutions. With a brief introduction to the fundamentals, classification and analysis of the traditional methods and technologies are presented, followed by a discussion of calibration and decision-making methods. Based on the analysis of the cutting-edge microwave sensing technologies, the limitations and challenges facing the present studies are identified. Then, focusing on some new emerging technologies including Monolithic Microwave Integrated Circuits (MMIC), antenna array, and System on Chip (SoC) Ultra-Wide Band (UWB) pulse-based time domain systems, the feasibility and prospective of potential solutions in this particular area are suggested. In addition, integration of emerging Information and Communication Technologies (ICT) and new design concepts of the sensor system concerning the practical use for smart manufacturing are also illustrated. The potentiality of the suggested new emerging technologies and integration of ICT to satisfy future digitised industry will be inspirational and of interest to researchers of both microwave engineering and food sectors.

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“…To apply the TRI, an exact or approximate dyadic Green's function (DGF) of the medium is required [33]. In [34][35][36][37][38][39], only the transmission part of Green's function was considered to locate the target in the multilayered media. However, it is not sufficient to take into account the presence of metal plates or reflecting surfaces below the foam.…”

Section: Introductionmentioning

confidence: 99%

An Electromagnetic Time-Reversal Imaging Algorithm for Moisture Detection in Polymer Foam in an Industrial Microwave Drying System

Omrani

Yadav

Link

et al. 2021

Sensors

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Microwave tomography (MWT) based control is a novel idea in industrial heating systems for drying polymer foam. In this work, an X-band MWT module is designed and developed using a fixed antenna array configuration and integrated with the HEPHAISTOS industrial heating system. A decomposition of the time-reversal operator (DORT) algorithm with a proper Green’s function of multilayered media is utilized to localize the moisture location. The derived Green’s function can be applied to the media with low or high contrast layers. It is shown that the time-reversal imaging (TRI) with the proposed Green’s function can be applied to the multilayered media with a moderately rough surface. Moreover, a single frequency TRI is proposed to decrease the measurement time. Numerical results for different moisture scenarios are presented to demonstrate the efficacy of the proposed method. The developed method is then tested on the experimental data for different moisture scenarios from our developed MWT experimental prototype. Image reconstruction results show promising capabilities of the TRI algorithm in estimating the moisture location in the polymer foam.

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Buried-Object Time-Reversal Imaging Using UWB Near-Ground Scattered Fields

Cited by 27 publications

References 21 publications

A Microwave Tomography System Using Time-Reversal Imaging for Forestry Applications

A Microwave Tomography System Using Time-Reversal Imaging for Forestry Applications

Microwave sensor technologies for food evaluation and analysis: Methods, challenges and solutions

An Electromagnetic Time-Reversal Imaging Algorithm for Moisture Detection in Polymer Foam in an Industrial Microwave Drying System

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