A Hybrid Finite Difference Frequency Domain and Particle Swarm Optimization Techniques for Forward and Inverse Electromagnetic Scattering Problems

Zainud-Deen, S.H.; Ibrahim, Mourad S.; El-Deen, Emad

doi:10.1109/nrsc.2007.371350

Cited by 8 publications

(8 citation statements)

References 13 publications

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“…Figure 4 shows the RCS of two layer dielectric (ε 2 = 9.8ε o , and µ 2 = µ o ) and metamaterial (ε 2 = −9.8ε o , and µ 2 = −µ o ) circular cylinder (a 1 = 0.05 m, a 2 = 0.10 m) illuminated by a TM plane wave at f = 300 MHz and θ = π compared with Matteo [15] and good agreement between those two results. Dielectric TM FDFD [9] Metamaterial TM FDFD Dielectric TE FDFD [9] metamaterial TE FDFD cylinder with a 1 = 0.3λ, a 2 = 0.25λ, a 3 = 0.2λ, a 4 = 0.15λ, b i = a i /2, (i = 1 : 4), γ = 2, ε r1 = 8, ε r2 = 6, ε r3 = 4, and ε r4 = 2 for either TM z or TE z incident plane wave and for metamaterial [9]. …”

Section: Numerical Resultsmentioning

confidence: 99%

“…The Finite-Difference Frequency-Domain (FDFD) method is formulated for the objects coated with metamaterial and used to calculate the scattering from different objects and compared with the available published results. The FDFD is simplest in formulation and most flexible in modeling arbitrarily shaped inhomogeneously filled and anisotropic scatterers [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Scattering From Bodies Coated With Metamaterial Using FDFD Method

Zainud-Deen¹,

Botros²,

Ibrahim³

2008

PIER B

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Abstract-The electromagnetic scattering from a conducting object coated with metamaterials, which have both negative permittivity and permeability is derived rigorously by using finite difference frequency domain (FDFD). A formulation for the FDFD method is presented. The scattering from circular and multilayers elliptic cylinder coated by metamaterial are investigated. Also, the scattering from dielectric and metamaterial sphere is depicted. Numerical results are compared with the available data in the literature.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scattering From Bodies Coated With Metamaterial Using FDFD Method

Zainud-Deen¹,

Botros²,

Ibrahim³

2008

PIER B

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“…The finite difference frequency domain is simple in formulation and most flexible in modeling arbitrarily shaped inhomogeneously filled and anisotropic scatterers [20][21][22].…”

Section: Problem Formulationmentioning

confidence: 99%

“…The outer boundary of the cell space is designed to absorb any energy incident upon it, by imposing the PML layers [23]. More details about the FDFD can be found in [20][21][22]. A general MATLAB code based upon the above analysis were developed by the authors.…”

Section: Problem Formulationmentioning

confidence: 99%

Breast Cancer Detection Using a Hybrid Finite Difference Frequency Domain and Particle Swarm Optimization Techniques

Zainud-Deen¹,

Hassen²,

Ali³

et al. 2008

PIER B

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Abstract-A hybrid technique based on Finite-difference frequency domain and particle swarm optimization techniques is proposed to reconstruct the breast cancer cell dimension and determines its position. Finite-difference frequency domain is formulated to calculate the scattered field after illuminating the breast by a microwave transmitter. Two-dimensional and three-dimensional models for the breast are used. The models include randomly distributed fatty breast tissue, glandular tissue, 2-mm thick skin, as well as chest wall tissue. The models are characterized by the dielectric properties of the normal breast tissue and malignant tissue at 800 MHz. Computer simulations have been performed by means of a numerical program; results show the capabilities of the proposed approach.

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“…Inverse scattering problems have attracted attention in the past few years [2][3][4]. The detection of the crack represents a complex inverse scattering problem that needs to be solved iteratively.…”

Section: Introductionmentioning

confidence: 99%

Crack Detection Using a Hybrid Finite Difference Frequency Domain and Particle Swarm Optimization Techniques

Zainud-Deen

Hassen

Ali

et al. 2009

PIER M

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Abstract-A hybrid technique based on finite-difference frequency domain (FDFD) and particle swarm optimization (PSO) techniques is proposed to reconstruct the angular crack width and its position in the conductor and ability to detect the crack width, position, and its depth in single and multilayer dielectric objects. FDFD is formulated to calculate the scattered field after illuminating the object by a microwave transmitter. Two-dimensional model for the object is used. Computer simulations have been performed by means of a numerical program; results show the capabilities of the proposed approach. This paper presents a computational approach to the two dimensional inverse scattering problem based on FDFD method and PSO technique to determine the crack position, width and depth. By using the scattered field, the specifications of the crack are reconstructed.

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A Hybrid Finite Difference Frequency Domain and Particle Swarm Optimization Techniques for Forward and Inverse Electromagnetic Scattering Problems

Cited by 8 publications

References 13 publications

Scattering From Bodies Coated With Metamaterial Using FDFD Method

Scattering From Bodies Coated With Metamaterial Using FDFD Method

Breast Cancer Detection Using a Hybrid Finite Difference Frequency Domain and Particle Swarm Optimization Techniques

Crack Detection Using a Hybrid Finite Difference Frequency Domain and Particle Swarm Optimization Techniques

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