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Determination of electromagnetic source localization with factorization method

Published online by Cambridge University Press:  23 August 2021

Nuri Gokmen Karakiraz Open the ORCID record for Nuri Gokmen Karakiraz [Opens in a new window] ,
Agah Oktay Ertay Open the ORCID record for Agah Oktay Ertay [Opens in a new window]  and
Ersin Göse
Nuri Gokmen Karakiraz*
Affiliation:
Electronics Engineering Department, National Defence University Hezârfen Aviation and Space Technologies Institute, 34149 Istanbul, Turkey
Agah Oktay Ertay
Affiliation:
Electrical Electronics Engineering Department, Erzincan Binali Yildirim University, 24002 Erzincan, Turkey
Ersin Göse
Affiliation:
Electronics Engineering Department, National Defence University Hezârfen Aviation and Space Technologies Institute, 34149 Istanbul, Turkey
*
Author for correspondence: Nuri Gokmen Karakiraz, E-mail: [email protected]
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Abstract

The factorization method (FM) is an attractive qualitative inverse scattering technique for the detection of geometrical features of unknown objects. This method depends on the selection of regularization parameters slightingly and has low calculation necessities. The aim of this work is to present a near-field FM for inverse source problems that have many applications. A modified test equation is obtained by converting the far-field term to Hankel's function. A different method has been proposed by manipulating the asymptotic approximation of Hankel's function in order to obtain near-field equations with incident angle and distance parameters. The novelty of this study is an integral equation based on the FM, which consists of multifrequency sparse near-field electric field measurements. We proved that the solution of the proposed integral equation gives information about the location of scatterers. The proposed algorithm is validated with simulation results and the capabilities of the presented method are assessed with several frequency regions and sources. Additionally, the presented method is compared with the direct sampling method in order to understand the performance of the proposed approach over a given scenario. The developed FM provides accurate results for electromagnetic source problems.

Keywords

Factorization methodinverse source problemmultifrequency
Type
Microwave Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 7 , September 2022 , pp. 839 - 848
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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