FDTD investigation on the electromagnetic scattering from a target above a randomly rough sea surface

Li, Jie; Guo, Lixin; Zeng, Hao

doi:10.1080/17455030802302134

Cited by 43 publications

(18 citation statements)

References 14 publications

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“…Over the past decades, several researchers have been investigated the electromagnetic scattering from a rough surface with/without a target above it, and explored the electromagnetic scattering to the area of low-attitude/long-range radar surveillance, target tracking, navigation systems operation, and communication at low grazing conditions above the sea surface [1][2][3][4][5][6][7][8]. Many kinds of method, including analytical methods and numerical approach, have been used to calculate the electromagnetic scattering of this composite model.…”

Section: Introductionmentioning

confidence: 99%

Study on Em Scattering From 2-D Target Above 1-D Large Scale Rough Surface With Low Grazing Incidence by Parallel Mom Based on Pc Clusters

Guo

Wang²,

Ma³

2009

PIER

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Abstract-Based on message passing interface (MPI) of the PC Clusters, the parallel method of moment (MOM) is applied to the electromagnetic (EM) scattering from one dimensional (1-D) large scale PEC Gaussian rough surface with two dimensional (2-D) PEC cylinder above it with low grazing incidence. The conjugate gradient method (CGM) for solving MOM matrix equation is parallelized according to the property of MPI in this work.The parallel computational efficiency and validity are shown by several numerical simulations, in which it is proved that the proposed method supplies a novel technique for solving the problem of the composite EM scattering for a 2-D target above 1-D large scale rough surface. Finally, the influences of root mean square (rms) height, the correlation length of the Gaussian surface, the size and the altitude of the cylinder, the polarization on the bistatic scattering coefficient (BSC) for low grazing incidence are also discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Study on Em Scattering From 2-D Target Above 1-D Large Scale Rough Surface With Low Grazing Incidence by Parallel Mom Based on Pc Clusters

Guo

Wang²,

Ma³

2009

PIER

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“…The finite-element method with domain decomposition and generalized forward-backward method [7,8] were analyzed for the electromagnetic scattering from target located above an ocean-like rough surface. We have also studied the light scattering from a spherical particle above a slightly rough surface [9] and the electromagnetic scattering from a target above the rough sea surface [10].…”

Section: Introductionmentioning

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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“…It is convenient for the sinusoidal FDTD to obtain the RCS versus the scattered angle at a certain frequency by a FDTD run. In our previous work, this method has been utilized to solve the scattering from a randomly rough surface [9,10] and the composite scattering from a target above a rough surface [11][12][13]. And the latter is achieved by the FDTD method with a pulsed plane wave excitation (pulsed FDTD).…”

Section: Introductionmentioning

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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FDTD investigation on the electromagnetic scattering from a target above a randomly rough sea surface

Cited by 43 publications

References 14 publications

Study on Em Scattering From 2-D Target Above 1-D Large Scale Rough Surface With Low Grazing Incidence by Parallel Mom Based on Pc Clusters

Study on Em Scattering From 2-D Target Above 1-D Large Scale Rough Surface With Low Grazing Incidence by Parallel Mom Based on Pc Clusters

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

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

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