Electromagnetic scattering from a PEC object above a dielectric rough sea surface by a hybrid PO–PO method

Li, Juan; Guo, Lixin; Chai, Shui-Rong; Jiao, Yong‐Chang

doi:10.1080/17455030.2014.961587

Cited by 16 publications

(7 citation statements)

References 27 publications

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“…For the conditions that meet > and = √ 2 / < 0.25, KA is applicable [20]. For the PM spectrum, both the root mean square (rms) height and correlation length are related to wind speed [13]. Therefore, is the rms slope of the rough surface that is commonly used to describe the roughness of a surface.…”

Section: Resultsmentioning

confidence: 99%

“…total (r) and total (r) are related to J total and M total on target or sea surface. J total = −(ŷ/ ) ⋅ total (r), M total = (ŷ ×n) ⋅ total (r), and their specific form can be found in our previous study [13].k is the scattering wave vector, and represents the electromagnetic wavenumber in free space. n is unit normal vector on the surface.…”

Section: Reduction Of Coupling Areasmentioning

confidence: 99%

“…In our previous works, the hybrid PO-PO method [12][13][14][15] was proposed to simulate the composite scattering of a perfectly conducting (PEC) cylinder above the random rough surface. The PO-PO method uses an iterative process, in which both the scattering of a target and the underlying rough surface are calculated by the PO method, and the interactions between them are solved by the Huygens equivalence principle and multipath scattering strategy.…”

Section: Introductionmentioning

confidence: 99%

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Scattering and Doppler Spectral Analysis for a Fast-Moving Target above Time-Varying Lossy Dielectric Sea Surface

Guo

2016

International Journal of Antennas and Propagation

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A numerical electromagnetic method based on the physical optics with physical optics method (PO-PO) is employed to calculate backscattered returns from a missile-like target above sea surface. Surfaces are time-varying Monte Carlo simulations initialized as realizations of a Pierson–Moskowitz spectrum. The monostatic normalized radar cross section of composite model by the hybrid PO-PO method is calculated and compared with those by the conventional method of moments, as well as the runtime and memory requirements. The results are found to be in good agreement. The runtime shows that the hybrid PO-PO method enables large-scale time-varying Monte Carlo simulations. The numerical simulations of the Doppler spectrum from the fast-moving target above time-varying lossy dielectric sea surface are obtained, and the Doppler spectra of backscattered signals from this model are discussed for different incident angles, speed of flying target, wind speeds, incident frequencies, and target altitudes in detail. Finally, the coupling effects on Doppler spectra are analyzed. All the results are obtained at the incidence of horizontal polarization wave in this study.

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Section: Resultsmentioning

confidence: 99%

Section: Reduction Of Coupling Areasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scattering and Doppler Spectral Analysis for a Fast-Moving Target above Time-Varying Lossy Dielectric Sea Surface

Guo

2016

International Journal of Antennas and Propagation

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“…In this study, a POA algorithm is developed for predicting the EM scattering of 3D two-layer rough surfaces. The POA is an extension of our previous work of physical optics with physical optics (PO-PO) [27,28], and it is initially used to predict the scattering of a composite model which includes an object and a single rough surface. The aim of this work is to extend the PO-PO to the case of a two-layer rough surface.…”

Section: Introductionmentioning

confidence: 99%

Three Dimensional Electromagnetic Scattering of Two-Layer Rough Surfaces Using Physical Optics Approximation Algorithm

Li¹,

Guo²,

Li³

2018

PIER M

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In this study, the physical optics approximation (POA) algorithm is described for predicting the electromagnetic (EM) scattering of three dimensional (3D) two-layer rough surfaces. The POA is initially used to calculate the composite scattering of an object and single layer rough surface under two dimensional (2D) situations. We extend this method to the case of a rough layer with two rough interfaces. The multiple coupling interactions between the upper and lower layer are considered based on an iterative strategy. Because the coupling effect is considered, the 3D model is quite time-consuming. In order to obtain numerical results rapidly, a parallel technique based on the OpenMP is adopted to accelerate the coupling iterative calculation. The model is applicable for moderate to large surface roughness. However, the rough surface should have small to moderate slopes so as to meet the conditions of POA. In numerical results, the normalized radar cross section of two-layer rough surfaces model under different polarizations is calculated, and the model is validated by comparison with a numerical reference method based on the method of moment. In addition, the influence of roughness on the scattering model is analyzed and discussed.

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“…The methods of solving scattering problems are plenty, such as the Kirchhoff approximation (KA) [8], small perturbation method (SPM) [9], small slope approximation (SSA) [10], the Method of Moment (MoM) [11], the Finite-Difference TimeDomain (FDTD) [12], and finite element method (FEM) [13]. In previous studies, the composite scattering from the rough sea surface and single target under harmonic wave irradiation have been reported and various methods are used in these studies [14][15][16][17][18][19][20]. However, the scattering from rough land surface such as soil surface, sand surface, and periodic distributed target under pulse wave irradiation was considered rarely [21,22].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Scattering by Multiple Columns Partially Buried in a Ground Plane

Ren

Zhao

Zhu

2017

International Journal of Antennas and Propagation

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Wideband electromagnetic scattering from multiple objects partially buried beneath rough earth soil surfaces is an important topic during recent years due to its extensive applications in several fields, such as ground remote sensing, ground penetrating radar applications, and target identification. Due to the advantages of finite-difference time-domain (FDTD) method in calculating the wideband electromagnetic scattering from rough surface in the presence of multiple objects, the FDTD method under ultrawideband (UWB) Gaussian pulse wave incidence is utilized in the present study for analyzing the frequency response of rough soil surfaces with periodically distributed multiple rectangular cross-section columns buried partially. In this paper, the dielectric property of the actual land surface is expressed using the four-component model, and the actual rough land surface is simulated utilizing Monte Carlo method with exponential correlation function. The emphasis of the present study is on analyzing the wideband response signatures of composite backscattering coefficient varying with frequency on the basis of extensive numerical simulations, in particular for calculating and discussing in detail the influence of the root-mean-square height and the correlation length of rough soil surface, soil moisture, the length and the width of the rectangular cross-section column, separation distance, burial depth, and tilt angle on the composite backscattering coefficient.

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Electromagnetic scattering from a PEC object above a dielectric rough sea surface by a hybrid PO–PO method

Cited by 16 publications

References 27 publications

Scattering and Doppler Spectral Analysis for a Fast-Moving Target above Time-Varying Lossy Dielectric Sea Surface

Scattering and Doppler Spectral Analysis for a Fast-Moving Target above Time-Varying Lossy Dielectric Sea Surface

Three Dimensional Electromagnetic Scattering of Two-Layer Rough Surfaces Using Physical Optics Approximation Algorithm

Electromagnetic Scattering by Multiple Columns Partially Buried in a Ground Plane

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