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

Li, Juan; Guo, Lixin; Zeng, Hao

doi:10.2528/pier08110102

Cited by 39 publications

(21 citation statements)

References 22 publications

(23 reference statements)

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“…It is obvious that the two methods are in fairly good agreement, which indicates the validity of MOM for composite scattering. It should be pointed out that the numerical results of BSC for a PEC cylinder above a PEC rough surface by MOM have been compared and verified with those by FDTD in our previous published paper [3]. The comparison of calculating time and acceleration ratio for one surface realization with σ = 0.1λ, l = 0.3λ, L = 409.6λ, θ i = 30 • , with a cylinder of which the radius r = 5λ, the height h = 10λ, 10 sampling points per λ experimented by different number of the processes are illustrated in Fig.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…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%

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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: Numerical Results and Discussionmentioning

confidence: 99%

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

Self Cite

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“…We assume the network occupies one FDTD cell. Gedney's PML is used to truncate all of the radiation boundaries [17]. The relationship between the port voltage V 0 and port current I 0 can be deduced and expressed as…”

Section: Matrix Methods For Complex Hybrid Network Including Nonlinearmentioning

confidence: 99%

Application of the Improved Matrix Type FDTD Method for Active Antenna Analysis

Xiao¹,

Shao

Wang³

2010

PIER

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Abstract-An improved finite-difference time-domain (FDTD) method has been extended to analyze the antennas with complicated lumped/active networks in this paper. The improved FDTD method is based on a novel integral transform and the matrix theory. Combining the novel integral transform with Kirchhoff's circuit laws, the hybrid networks comprised of high order linear and nonlinear elements with arbitrary connection can be modeled by a stable matrix equation. An effective model is built for linear lumped networks including internal independent sources. A wire antenna loaded with wideband match network and a two-element active patch antenna loaded with Gunn diodes are analyzed by the developed techniques. The analysis results indicate that the improved matrix-type FDTD method is not only stable and accurate, but also time-saving in simulating the complicated hybrid networks.

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

Cited by 39 publications

References 22 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

Application of the Improved Matrix Type FDTD Method for Active Antenna Analysis

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

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