Numerical Simulations Wave Scattering From Two-Layered Rough Interface

Wang, Rui; Guo, Lixin

doi:10.2528/pierb08082903

Cited by 10 publications

(8 citation statements)

References 17 publications

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“…Nevertheless, under the tangent plane approximation (usually called Kirchhoff Approximation [18][19][20]) which assumes large surface curvature radius and gentle surface slopes, it allows one to calculate the coherent scattered intensity attenuation owing to the surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Degree of Roughness of Rough Layers: Extensions of the Rayleigh Roughness Criterion and Some Applications

Pinel

Bourlier

Saillard

2010

PIER B

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Abstract-In the domain of electromagnetic wave propagation in the presence of rough surfaces, the Rayleigh roughness criterion is a widelyused means to estimate the degree of roughness of considered surface. In this paper, this Rayleigh roughness criterion is extended to the case of rough layers. Thus, it provides an interesting qualitative tool for estimating the degree of electromagnetic roughness of rough layers.

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Section: Introductionmentioning

confidence: 99%

Degree of Roughness of Rough Layers: Extensions of the Rayleigh Roughness Criterion and Some Applications

Pinel

Bourlier

Saillard

2010

PIER B

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“…The integrand of the four edge sub-patches S 1 ∼ S 4 can be treated similar to the non-singular case of (20). It is necessary to note thatũ n andṽ n is different from those in (23), and has the following form Figure 6.…”

Section: Treatment Of the Singular Integralsmentioning

confidence: 99%

“…In this study, the rough surface has been modeled by the NURBS surface. Namely, the elements ofZ are given by (20) and,…”

Section: Generating the Impedance Matrixmentioning

confidence: 99%

“…The purpose of this paper is efficiency and accuracy in calculating the bistatic scattering from 2D PEC rough surface by the HMOM based on the previous work [13,[19][20][21][22] of our research teams. To our knowledge, this is the first time that the HMOM is introduced to calculate the BSC of rough surface, and the BSC is obtained and compared to that of LMOM with RWG or rooftop basis function to verify the validity.…”

Section: Introductionmentioning

confidence: 99%

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Higher Order Method of Moments for Bistatic Scattering From 2d Pec Rough Surface With Geometric Modeling by Nurbs Surface

Wang¹,

Guo²,

Wei³

et al. 2012

PIER

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Abstract-The higher order method of moments (HMOM) has been proposed to calculate the bistatic scattering from two-dimensional (2D) perfectly electric conducting (PEC) rough surface in this paper. The electric field integral equation (EFIE) is solved through the HMOM with the hierarchical higher order basis functions which are the modified Legendre polynomials. The non-uniform rational B-spline (NURBS) surface is applied to model the plane surface related to the rough surface. Validity of this approach is shown by comparing the bistatic scattering coefficient (BSC) to that of lower order MOM (LMOM) with the Rao-Wilton-Glisson (RWG) or rooftop basis function. This approach has fewer segments in the parametric directions than the LMOM with rooftop basis, and is more efficient for the fewer unknowns and requires less memory than the LMOM with RWG basis. Properties of bistatic scattering from a 2D Gaussian rough surface are also exhibited and analyzed.

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“…Electromagnetic scattering from randomly rough surfaces is an important research topic in remote sensing (e.g., [1][2][3][4][5][6]). Several fast numerical techniques have been proposed in the literature for both onedimensional and two-dimensional rough surfaces.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Method for Electromagnetic Scattering From Dielectric Rough Surfaces Based on the Stochastic Second Degree Method

Liu²

2009

PIER

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Abstract-In this paper, we propose an iterative numerical approach based on the stochastic second degree (SSD) algorithm in combination with a new splitting of the impedance matrix to analyze electromagnetic scattering from 1-D dielectric rough surfaces. The embedded matrix-vector product is computed using the banded matrix iterative approach/canonical grid (BMIA/CAG) and the spectral acceleration (SA) technique. For Gaussian surface with Gaussian spectrum, through extensive numerical simulation, it is observed that for HH polarization, the proposed method requires roughly one half number of iterations as needed by the forward-backward method with spectral acceleration (FBM-SA). When the rms height is small, the proposed method takes more run time; when the rms slope is no less than 0.33 and rms height is no less than 1.0λ, where λ is the wavelength, the proposed method is more efficient. More importantly, it obviously improves the convergence properties over FBM-SA by changing cases from divergent to convergent when rms height is no less than 2.0λ and rms slope is no less than 0.55 except for one extreme case. For VV polarization, the proposed method is less computationally efficient in terms of run time and number of iterations than FBM-SA. However, as far as convergence properties are considered, similar to HH polarization, the proposed method improves over FBM-SA when the rms height and rms slope are large. Hence for both polarizations, the proposed method demonstrates its suitability when dealing with truly rough surfaces.Corresponding author: Y. Du (zjuydu03@zju.edu.cn). 328Du and Liu

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Numerical Simulations Wave Scattering From Two-Layered Rough Interface

Cited by 10 publications

References 17 publications

Degree of Roughness of Rough Layers: Extensions of the Rayleigh Roughness Criterion and Some Applications

Degree of Roughness of Rough Layers: Extensions of the Rayleigh Roughness Criterion and Some Applications

Higher Order Method of Moments for Bistatic Scattering From 2d Pec Rough Surface With Geometric Modeling by Nurbs Surface

A Numerical Method for Electromagnetic Scattering From Dielectric Rough Surfaces Based on the Stochastic Second Degree Method

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