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Perturbation Approach to Shape Reconstruction in a Rectangular Waveguide using Experimental Data
KTH Royal Institute of Technology.
KTH Royal Instute of Technology.
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
2018 (English)In: 2018 International Applied Computational Electromagnetics Society Symposium (ACES), IEEE, 2018Conference paper, Published paper (Refereed)
Abstract [en]

We consider the inverse problem of reconstructing the shape of a deformation in one of the broad walls of a rectangular waveguide. Assuming a small deformation, resulting in weak scattering, the direct problem is solved using a first order perturbation approach. Hence, the inverse problem becomes linear and is formulated as an equation system for a set of expansion coefficients. The illposedness of the inverse problem is handled with regularization, by adding a penalty term which weight is determined by the L-curve method. The theory is tested on experimental reflection data, using the dominant mode of the waveguide. The reconstructed shape is in qualitative agreement with the true shape, but a detailed resolution cannot be obtained due to insufficient quality of the experimental data. Extensions and improvements of the method are discussed.

Place, publisher, year, edition, pages
IEEE, 2018.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Physics, Electrotechnology
Identifiers
URN: urn:nbn:se:lnu:diva-76902DOI: 10.23919/ROPACES.2018.8364172ISI: 000435263000085Scopus ID: 2-s2.0-85048342443ISBN: 978-0-9960-0787-0 (print)OAI: oai:DiVA.org:lnu-76902DiVA, id: diva2:1233264
Conference
International Applied Computational Electromagnetics Society Symposium (ACES), Denver, CO, March 25-29, 2018
Available from: 2018-07-17 Created: 2018-07-17 Last updated: 2019-05-27Bibliographically approved

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Dalarsson, Mariana

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf