Scattering by Multilayered Structures Using the Extended Method of Auxiliary Sources Emas

Hichem, Naamen; Aguili, Taoufik

doi:10.2528/pierb09042307

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…The problem of electromagnetic scattering from inhomogeneous media has been investigated for several decades [1][2][3][4]. The scattering models are applied to remote sensing, geoscience and optics.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Model of Electromagnetic Scattering From 3d Multi-Layer Dielectric Media With Slightly Rough Surfaces

Lin¹,

Zhang²,

Fang³

2009

PIER

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Abstract-A theoretical model of scattering from three-dimensional arbitrary layered media with 3D infinite rough surfaces based on the small perturbation method (SPM) is derived in the present paper. The scattering field and bistatic scattering coefficient for linear polarized waves are derived respectively. Firstly, the electric and magnetic fields in each region of the layered structure are expanded into perturbation series in spectral domain. Secondly, the expansion coefficients of each order are obtained by applying the boundary conditions. As a result, the expressions of the zeroth-, first-and second-order solutions of the scattering problem based on the SPM are obtained, in which the second-order solution is the primary contribution of this work. The theoretical model is helpful to understand the dependence between the scattering field and physical properties of the layered structure (such as surface roughness and dielectric constants at different depths). The result can be applied to modeling of the received radar signal from nature targets such as layered soil and ice with full polarizations.

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Section: Introductionmentioning

confidence: 99%

“…In the application of remote sensing, the scattering models are helpful for understanding the forward problem of scattering from natural targets such as layered soil, sea ice, ionosphere, lunar surface, etc. [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Model of Electromagnetic Scattering From 3d Multi-Layer Dielectric Media With Slightly Rough Surfaces

Lin¹,

Zhang²,

Fang³

2009

PIER

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“…The standard placement of the auxiliary sources is based on empirical conventions and on the caustic hypothesis. As a result, the optimal distribution of the auxiliary sources, for a predefined accuracy is achieved by try-anderror processes or by determining the corresponding caustic surfaces [8,[21][22][23][24]. These approaches are analytically feasible only when treating problems with canonical geometries (sphere, ellipsoid or infinite plan .…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Method of Auxiliary Sources for 3d Scattering Problems by Using Generalized Impedance Boundary Conditions and Level Set Technique

Bouzidi¹,

Aguili²

2014

PIER B

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Abstract-The method of auxiliary sources (MAS) presents a promising alternative to methods based on discretization, currently used for solving scattering problems. The optimal choice of the auxiliary surface and the proper allocation of radiation centers play a crucial role in ensuring accuracy and stability of the MAS. This approach is considered an open issue and can be investigated numerically. In this paper, we propose a systematic and fully automated technique leading to determine the optimal parameters of the MAS for arbitrary shaped obstacles (partially or fully penetrable) for scattering problems.

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“…The foremost contribution here is to subdivide the inhomogeneous structure in finite, homogeneous, recovered and strongly coupled mediums [11][12][13]. For each inclusion boundary, the sum of the radiated electromagnetic fields by the overall inner different auxiliary sources bases inclusions and the outer host cylinder ones satisfies the tangential continuity condition leading to a linear system.…”

Section: Introductionmentioning

confidence: 99%

Scattering by Jacket Structures Analysis via the Extended Method of Auxiliary Sources Emas

Hichem¹,

Aguili²

2009

PIER M

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Abstract-This paper establishes the extension of the method of auxiliary sources EMAS for the purpose of modeling the electromagnetic scattering response by jacket cylindrical structures constituted by a finite number of dielectric eccentric cylindrical inclusions embedded in a host dielectric one. Appropriate boundary conditions mixed with judicious decomposed domains leads to the prediction of the backscattering cross section. The algorithm also integrates the global electromagnetic coupling between the inclusions. The EMAS is validated by varying the inner cylinders repartitions and fine-tuning the electric permittivity according to different geometries. The EMAS level of accuracy compared with the indirect matching mode method IMM reveals a good agreement between the numerical computation results.

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Scattering by Multilayered Structures Using the Extended Method of Auxiliary Sources Emas

Cited by 7 publications

References 16 publications

Theoretical Model of Electromagnetic Scattering From 3d Multi-Layer Dielectric Media With Slightly Rough Surfaces

Theoretical Model of Electromagnetic Scattering From 3d Multi-Layer Dielectric Media With Slightly Rough Surfaces

Optimization of the Method of Auxiliary Sources for 3d Scattering Problems by Using Generalized Impedance Boundary Conditions and Level Set Technique

Scattering by Jacket Structures Analysis via the Extended Method of Auxiliary Sources Emas

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