Characterization of electromagnetic parameters through inversion using metaheuristic technique

Elkattan, Mohamed; Kamel, A.

doi:10.1080/17415977.2020.1797718

Cited by 2 publications

(5 citation statements)

References 38 publications

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“…In this paper, a complete orthonormal set is introduced to be used to solve the volume integral equation. While another complete set in Elkattan and Kamel (2021) was derivable from an integral eigenvalue equation, the novel complete set in this work is derived by solving a differential eigenvalue equation. Furthermore, the proposed complete set in the current analysis is of radiating/nonradiating polarization currents type.…”

Section: Forward Formulationmentioning

confidence: 99%

“…This forms an integral equation in z for each k x with Q ( z ) defined as (Elkattan and Kamel, 2021): …”

Section: Forward Formulationmentioning

confidence: 99%

“…Thus, these even and odd complete sets together form a complete orthonormal radiating/nonradiating set. The simpler eigenvalues formulations of this complete set's elements result in a less computational overhead compared to the complete set presented in Elkattan and Kamel (2021), which are based on complex eigenvalues elements. Moving forward, we can now expand the polarization current J y (k x , z) in terms of the complete orthonormal set as:…”

Section: Electromagnetic Field Interactionmentioning

confidence: 99%

“…ζ and ζ u are the observation point and source point location, respectively. Additionally (Elkattan and Kamel, 2021): …”

Section: Forward Formulationmentioning

confidence: 99%

“…Thus, these even and odd complete sets together form a complete orthonormal radiating/nonradiating set. The simpler eigenvalues formulations of this complete set’s elements result in a less computational overhead compared to the complete set presented in Elkattan and Kamel (2021), which are based on complex eigenvalues elements. Moving forward, we can now expand the polarization current J y ( k x , z ) in terms of the complete orthonormal set as: where aimgotrue(kztrue)≠0 for L/2>tan⁡true(kzL/2true)kz>0, And aimgetrue(kztrue)≠0 for cot⁡true(kzL/2true)kz<0, aimgotrue(kztrue) and aimgetrue(kztrue) are the current expansion coefficients of the imaginary roots at the odd and even components of the radiating/nonradiating set, respectively.…”

Section: Forward Formulationmentioning

confidence: 99%

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A novel representation of electromagnetic field interaction with vertically stratified structures

Elkattan

Kamel

2023

COMPEL

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Purpose The purpose of this study is to develop an efficient model to solve the electromagnetic forward problem using a novel semi-analytical approach to compute the electromagnetic fields because of the presence of a scatterer. Design/methodology/approach The proposed model involves a novel formulation of a complete orthonormal set of radiating/nonradiating polarization currents. Furthermore, an integral equation-based representation is derived, and the appropriate boundary conditions are imposed to get the scattered electromagnetic field. An error term is introduced to evaluate the obtained results. Findings The proposed model was tested using several examples at different frequencies. The results of this study show that the novel representation exhibits fast convergence behavior and achieves highly accurate results, when compared to the results provided by the transmission line method. Originality/value The derived formulations presented in this study are significant in the electromagnetic forward modelling field because of the meaningful physical representation they provide. This is an important aspect that leads to precise calculation of electromagnetic fields for various applications.

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Section: Forward Formulationmentioning

confidence: 99%

“…This forms an integral equation in z for each k x with Q ( z ) defined as (Elkattan and Kamel, 2021): …”

Section: Forward Formulationmentioning

confidence: 99%

Section: Electromagnetic Field Interactionmentioning

confidence: 99%

“…ζ and ζ u are the observation point and source point location, respectively. Additionally (Elkattan and Kamel, 2021): …”

Section: Forward Formulationmentioning

confidence: 99%

Section: Forward Formulationmentioning

confidence: 99%

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A novel representation of electromagnetic field interaction with vertically stratified structures

Elkattan

Kamel

2023

COMPEL

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Characterization of Induced Polarization Parameters from Electromagnetic Data using Evolutionary Approach

Elkattan¹,

Kamel²

2023

J. Electromagn. Eng. Sci

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Electromagnetic methods are one of the most important tools for exploring the physical properties of scatterers. When the scattering object is polarizable, more information can be gained from electromagnetic measurements to determine the scatterer’s electrical properties. In this paper, an inversion scheme is introduced to extract induced polarization information from electromagnetic measurements. The inverse scattering problem is reformulated as an optimization problem that utilizes an efficient forward model solver to compute the scattered field. Furthermore, a simulated annealing approach is considered in the presented scheme, wherein different cooling schedules are evaluated to solve the inverse problem. The results of applying the proposed scheme to various case studies are reported.

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Characterization of electromagnetic parameters through inversion using metaheuristic technique

Cited by 2 publications

References 38 publications

A novel representation of electromagnetic field interaction with vertically stratified structures

A novel representation of electromagnetic field interaction with vertically stratified structures

Characterization of Induced Polarization Parameters from Electromagnetic Data using Evolutionary Approach

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