Numerical simulation of scattering from three-dimensional randomly rough surfaces

Fung, A.K.; Shah, M.R.; Tjuatja, S.

doi:10.1109/36.312887

Cited by 85 publications

(34 citation statements)

References 10 publications

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“…Reflection still occurs, but it makes negligible contributions to the scattered field. To solve this problem, Fung et al [20] put forward the Gaussian window function to guard against the truncation effect. And the Gaussian window function is expressed as…”

Section: Connective Boundarymentioning

confidence: 99%

FDTD Investigation on Bistatic Scattering From a Target Above Two-Layered Rough Surfaces Using Upml Absorbing Condition

Li¹,

Guo²,

Zeng³

2008

PIER

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Abstract-This paper presents an investigation for the electromagnetic scattering characteristic of the 2-D infinitely long target located above two-layered 1-D rough surfaces. A finite-difference time-domain (FDTD) approach is used in this study, and the uniaxial perfectly matched layer (UPML) medium is adopted for truncation of FDTD lattices, in which the finite-difference equations can be used for the total computation domain by properly choosing the uniaxial parameters. The upper and lower interfaces are characterized with Gaussian statistics for the height and the autocorrelation function. For the composite scattering of infinitely long cylinder and underlying single-layered rough surfaces as an example, the angular distribution of scattering coefficient with different incident angles is calculated and it shows good agreement with the numerical result by the conventional method of moments. And the influence of some parameters related to the twolayered rough surfaces and target on composite scattering coefficient is investigated and discussed in detail.

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Section: Connective Boundarymentioning

confidence: 99%

FDTD Investigation on Bistatic Scattering From a Target Above Two-Layered Rough Surfaces Using Upml Absorbing Condition

Li¹,

Guo²,

Zeng³

2008

PIER

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“…If we assume H y =H z =E z =0 and only account for the field vector in the Y-Z plane, the FDTD formulation of finitedifference forms is shown in [9]. Following Yee's notation, we denote a mesh point as Actually, in order to reduce lattice boundary reflection, processing of boundary is very important.…”

Section: A Fdtd Algorithm and The Boundary Conditionmentioning

confidence: 99%

“…The electric conductance and permeability in the layer shall be set exponent form. For an example, electric conductance is following as (9) Where, d is thickness of PML layer, and σ max is electric conductance of outside. If n is identified to unit, the variety of conductance is linearity, and two for parabola form.…”

Section: A Fdtd Algorithm and The Boundary Conditionmentioning

confidence: 99%

“…Generally, the experiment is best way to the evaluation of models; however, the numerical simulation is the most convenient as to weighting and evaluating for them. FDTD algorithm using to solve the Maxwell's equations is one of the important methods for the research of analog for the scattering on the rough sea surface [9][23] [22] [18]. And this method is just a viable approach and easy to be understood, and is a high accuracy, moreover an improved algorithm can be chosen to accelerate to compute.…”

Section: Introductionmentioning

confidence: 99%

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Study of non-Gaussian scattering characteristic based on FDTD algorithm for rough sea surface

Gao

Wang

Chen³

et al. 2009

2009 4th IEEE Conference on Industrial Electronics and Applications

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A study of simulation for non-Gaussian sea surface by introducing into the wave profile equation a directional function feasible is presented. A classical finite-difference timedomain (FDTD) algorithm was applied to calculate the scattered field based upon the simulation sea surface data, however, a sample yet effective approach proposed to separate the scattered field from the total field influenced by the incidence wave; the effect is more evident. Then, the far field scattering coefficient is calculated and compared with that of integral equation model (IEM) method.Index Terms-non-Gaussian sea surface, FDTD algorithm, model of scattering sea surface.

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“…Reflection still occurs, but it makes negligible contributions to the scattered field. To solve this problem, Fung et al [19] put forward the Gauss window function to suppress the truncation effect.…”

Section: Computation Of Near Fieldsmentioning

confidence: 99%

FDTD Method Investigation on the Polarimetric Scattering From 2-D Rough Surface

Li¹,

Guo²,

Zeng³

2010

PIER

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Abstract-A polarimetric scattering from two-dimensional (2-D) rough surface is presented by the finite-difference time-domain (FDTD) algorithm.The FDTD calculations with sinusoidal and pulsed plane wave excitations are performed. As the sinusoidal FDTD is concerned, it is convenient to obtain the scattered angular distribution of normalized radar cross section (NRCS) from rough surface for a single frequency. And the advantage of pulsed FDTD is to calculate the frequency distribution of NRCS from rough surface in a scattered direction of interest. A single frequency scattering from rough surface by sinusoidal FDTD is validated by the result of Kirchhoff Approximation (KA). And the frequency response of rough surface by pulsed FDTD is verified by that of sinusoidal FDTD, which requires an individual FDTD run for every frequency. To save computation time, the MPI-based parallel FDTD method is adopted. And the computation time of parallel FDTD algorithm is dramatically reduced compared to a single-process implementation. Finally, the polarimetric scattering of rough surface with the sinusoidal and pulsed FDTD illumination are presented and analyzed for different polarizations.

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Numerical simulation of scattering from three-dimensional randomly rough surfaces

Cited by 85 publications

References 10 publications

FDTD Investigation on Bistatic Scattering From a Target Above Two-Layered Rough Surfaces Using Upml Absorbing Condition

FDTD Investigation on Bistatic Scattering From a Target Above Two-Layered Rough Surfaces Using Upml Absorbing Condition

Study of non-Gaussian scattering characteristic based on FDTD algorithm for rough sea surface

FDTD Method Investigation on the Polarimetric Scattering From 2-D Rough Surface

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