Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/11

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Publication Index: search.filters.publicationIndex.ScopusSubject: search.filters.subject.Inverse problems

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  • Article
    Citation - WoS: 2
    Citation - Scopus: 2
    A Non-Resonant Approach for Dielectric Constant Reconstructions Via Newton Iterations
    (Elsevier, 2023) Özkal, Ceren; Yaman, Fatih
    In this study, a Newton–Raphson-based iterative method has been proposed to obtain dielectric constants accurately from measurements. The originalities of the approach lie in its applicability at non-resonant frequencies, which brings a significant experimental simplicity by avoiding critical coupling, expansion of available frequencies in different bands with the same cost-efficient low-Q (?60) cavity. The direct problem involves either measuring power values inside a cavity (14.6 × 5 × 20.6) cm via a spectrum analyzer or simulating the complete setup via CST-MWS software at one of the non-resonant modes, 1.5 GHz. The solution to the inverse problem provides fastly converging results with an error rate of 1% for the unknown permittivities. The experiments were carried out using five different liquid samples even though the proposed technique does not have a limitation on solid materials. Applicability and the effectiveness of the introduced method is illustrated in detail and comparisons with the perturbation method is provided. © 2023 Elsevier GmbH
  • Editorial
    Recent Theory and Applications on Inverse Problems 2014
    (Hindawi Publishing Corporation, 2015) Yaman, Fatih; Yakhno, Valery G.; Özdemir, Caner; Yu, Tzu-Yang; Potthast, Roland
    This special issue presents some very interesting recent developments in the area of inverse problems.The scope of the issue covers wide range of disciplines, for example, electromagnetics, acoustics, heat conduction, and image processing, from theory and application point of view. In the following, we give very brief descriptions of the published papers.