Scattering From Perfectly Magnetic Conducting Surfaces: The Extended Theory of Boundary Diffraction Wave Approach

Yalçin, Uğur

doi:10.2528/pierm09042210

Cited by 9 publications

(9 citation statements)

References 19 publications

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“…The Helmholtz-Kirchhoff integral is often used in the calculation of diffraction fields. The Helmholtz-Kirchhoff integral can give the field distribution at any point P in volume v bounded by a closed surface S, as shown by equation (1) (Yalçın, 2009a(Yalçın, , 2009b(Yalçın, , 2009c:…”

Section: The Theory Of Boundary Diffraction Wavementioning

confidence: 99%

“…For this purpose, the extended theory of BDW (ETBDW) has been obtained (Umul, 2009). It is necessary to use ETBDW to provide realistic and clear solutions to a problem, such as perfectly conductive surfaces [perfect electric conductive (PEC) or perfectly magnetic conductive (PMC)] or impedance surfaces where there is a reflection (Yalçın, 2009a(Yalçın, , 2009b(Yalçın, , 2009c. The difference between the ETBDW approach from the BDW theory approach is that it allows the calculation of the contribution of reflection to diffraction in problems such as perfect conductors or impedance surfaces (Umul and Yalçın, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Uniform diffracted fields of the extended theory of BDW from the circular aperture on a perfectly magnetic conductive surface

Altınel,

Yalçın

2024

COMPEL

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Purpose This paper aims to examine the uniform diffracted fields from a perfectly magnetic conductive (PMC) surface with the extended theory of boundary diffraction wave (BDW) approach. Design/methodology/approach Miyamoto and Wolf’s symbolic expression of the vector potential was used in the extended theory of BDW integral. This vector potential is applied to the problem, and the nonuniform field expression found was made uniform. Here, the expression is made uniform, using the detour parameter with the help of the asymptotic correlation of the Fresnel function. The BDW theory for the PMC surface extended the diffracted fields, and the uniform diffracted fields were calculated. Findings The field expressions obtained were interpreted with the graphs numerically for different aperture radii and observation distances. It has been shown that the BDW is continuous behind the diffracting aperture. There does not exist any discontinuity at the geometrically light-to-shadow transition boundary, as is required by the theory. Originality/value The results were graphically compared with diffracted fields for other surfaces. As far as we know, the uniform diffracted fields from the circular aperture on a PMC surface were calculated for the first time with the extended theory of the BDW approach.

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Section: The Theory Of Boundary Diffraction Wavementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Uniform diffracted fields of the extended theory of BDW from the circular aperture on a perfectly magnetic conductive surface

Altınel,

Yalçın

2024

COMPEL

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“…The polarization state of a beam of light is traditionally described by a vector I = (I, Q, U, V ) T composed of four Stokes parameters (T means transpose) [14][15][16][17][18][19][20][21][22][23]. The first Stokes parameter, I, is the intensity, while the other three parameters describe the polarization state of the beam.…”

Section: Theory and Definitionsmentioning

confidence: 99%

Depolarization and Polarization of Light Scattering by Dustlike Tropospheric Aerosols

Sun

Wang

Shen

et al. 2010

Journal of Electromagnetic Waves and Applications

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Measurement of the polarization and depolarization characteristics of light scattering by aerosols is a powerful remote sensing technique for retrieving the microphysics of aerosol particles. In this paper, we model dust-like aerosols using mixtures polydisperse, randomly oriented spheroids with varying aspect ratios from 0.6 µm to 2.0 µm at the wavelength of 0.443 µm and 0.865 µm. The Stokes scattering matrix elements averaged over wide shape distributions of spheroids are compared with those computed for polydisperse randomly oriented single scattering spheroids. The shape-averaged phase function for a mixture of spheroids is smooth, featureless, and nearly flat at side-scattering angles and closely resembles those typically measured for natural sand and dust particles. The linear and circular depolarization ratios were computed using the rigorous T -matrix method. We also show that there is no simple relationships between the depolarization ratio and aspect ratio, and an single spheroidal shape particles cannot be used to model natural dust aerosols.

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“…These equations, (19) and (20), are numerically compared with the corresponding analytic solutions in references [10,11]. It is seen from the comparisons given in [10,11], the series solutions approximate the analytic solutions successfully. Hence, the scattered waves by the resistive plane can be expressed by the equations of…”

Section: Theorymentioning

confidence: 99%

Diffraction Theory of Waves by Resistive Surfaces

Umul¹,

Yalçin²

2010

PIER B

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Abstract-Diffraction of scalar plane waves by resistive surfaces are investigated by defining a new boundary condition in terms of the Dirichlet and Neumann conditions. The scattering problems of waves by a resistive half-plane and the interface between resistive and perfectly magnetic conducting half-planes are examined with the developed method. The resulting fields are plotted numerically. The numerical results show that the evaluated field expressions are in harmony with the theory.

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Scattering From Perfectly Magnetic Conducting Surfaces: The Extended Theory of Boundary Diffraction Wave Approach

Cited by 9 publications

References 19 publications

Uniform diffracted fields of the extended theory of BDW from the circular aperture on a perfectly magnetic conductive surface

Uniform diffracted fields of the extended theory of BDW from the circular aperture on a perfectly magnetic conductive surface

Depolarization and Polarization of Light Scattering by Dustlike Tropospheric Aerosols

Diffraction Theory of Waves by Resistive Surfaces

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