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Differential Ultra-Wideband Microwave Imaging: Principle Application Challenges

Wideband microwave imaging is of interest wherever optical opaque scenarios need to be analyzed, as these waves can penetrate biological tissues, many building materials, or industrial materials. One of the challenges of microwave imaging is the computation of the image from the measurement data bec...

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Autores principales: Sachs, Jürgen, Ley, Sebastian, Just, Thomas, Chamaani, Somayyeh, Helbig, Marko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6068498/
https://www.ncbi.nlm.nih.gov/pubmed/29970835
http://dx.doi.org/10.3390/s18072136
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author Sachs, Jürgen
Ley, Sebastian
Just, Thomas
Chamaani, Somayyeh
Helbig, Marko
author_facet Sachs, Jürgen
Ley, Sebastian
Just, Thomas
Chamaani, Somayyeh
Helbig, Marko
author_sort Sachs, Jürgen
collection PubMed
description Wideband microwave imaging is of interest wherever optical opaque scenarios need to be analyzed, as these waves can penetrate biological tissues, many building materials, or industrial materials. One of the challenges of microwave imaging is the computation of the image from the measurement data because of the need to solve extensive inverse scattering problems due to the sometimes complicated wave propagation. The inversion problem simplifies if only spatially limited objects—point objects, in the simplest case—with temporally variable scattering properties are of interest. Differential imaging uses this time variance by observing the scenario under test over a certain time interval. Such problems exist in medical diagnostics, in the search for surviving earthquake victims, monitoring of the vitality of persons, detection of wood pests, control of industrial processes, and much more. This paper gives an overview of imaging methods for point-like targets and discusses the impact of target variations onto the radar data. Because the target variations are very weak in many applications, a major issue of differential imaging concerns the suppression of random effects by appropriate data processing and concepts of radar hardware. The paper introduces related methods and approaches, and some applications illustrate their performance.
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spelling pubmed-60684982018-08-07 Differential Ultra-Wideband Microwave Imaging: Principle Application Challenges Sachs, Jürgen Ley, Sebastian Just, Thomas Chamaani, Somayyeh Helbig, Marko Sensors (Basel) Article Wideband microwave imaging is of interest wherever optical opaque scenarios need to be analyzed, as these waves can penetrate biological tissues, many building materials, or industrial materials. One of the challenges of microwave imaging is the computation of the image from the measurement data because of the need to solve extensive inverse scattering problems due to the sometimes complicated wave propagation. The inversion problem simplifies if only spatially limited objects—point objects, in the simplest case—with temporally variable scattering properties are of interest. Differential imaging uses this time variance by observing the scenario under test over a certain time interval. Such problems exist in medical diagnostics, in the search for surviving earthquake victims, monitoring of the vitality of persons, detection of wood pests, control of industrial processes, and much more. This paper gives an overview of imaging methods for point-like targets and discusses the impact of target variations onto the radar data. Because the target variations are very weak in many applications, a major issue of differential imaging concerns the suppression of random effects by appropriate data processing and concepts of radar hardware. The paper introduces related methods and approaches, and some applications illustrate their performance. MDPI 2018-07-03 /pmc/articles/PMC6068498/ /pubmed/29970835 http://dx.doi.org/10.3390/s18072136 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sachs, Jürgen
Ley, Sebastian
Just, Thomas
Chamaani, Somayyeh
Helbig, Marko
Differential Ultra-Wideband Microwave Imaging: Principle Application Challenges
title Differential Ultra-Wideband Microwave Imaging: Principle Application Challenges
title_full Differential Ultra-Wideband Microwave Imaging: Principle Application Challenges
title_fullStr Differential Ultra-Wideband Microwave Imaging: Principle Application Challenges
title_full_unstemmed Differential Ultra-Wideband Microwave Imaging: Principle Application Challenges
title_short Differential Ultra-Wideband Microwave Imaging: Principle Application Challenges
title_sort differential ultra-wideband microwave imaging: principle application challenges
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6068498/
https://www.ncbi.nlm.nih.gov/pubmed/29970835
http://dx.doi.org/10.3390/s18072136
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