Efficient hybrid method for electromagnetic scattering from a coated object above a two-layered rough surface

He, Hong-Jie; Guo, Lixin

doi:10.1364/ao.57.007102

Cited by 4 publications

(2 citation statements)

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“…Yan simulated the imaging of a ship above the sea with single-frequency and single-view using the bouncing ray method [ 12 ]. He used the physical optics and iterative physical optics (PO-IPO) hybrid method to calculate the electromagnetic scattering characteristics of a random rough sea and objects above it [ 13 ]. Li analyzed the electromagnetic scattering from electrically large ship targets in a marine environment via the combining of the fact-based asymptotic method (FBAM) and the geometrical optics and physical optics (GO/PO) hybrid method [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Composite Backscatter Characteristics of Conductive/Dielectric Ships and Sea Surfaces with Breaking Waves under High Sea Conditions

Zhang

2023

Sensors

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When a radar detects marine targets, the radar echo is influenced by the shape, size and dielectric properties of the targets, as well as the sea surface under different sea conditions and the coupling scattering between them. This paper presents a composite backscattering model of the sea surface and conductive and dielectric ships under different sea conditions. The ship scattering is calculated using the equivalent edge electromagnetic current (EEC) theory. The scattering of the sea surface with wedge-like breaking waves is calculated using the capillary wave phase perturbation method combined with the multi-path scattering method. The coupling scattering between ship and sea surface is obtained using the modified four-path model. The results reveal that the backscattering RCS of the dielectric target is significantly reduced compared with the conducting target. Furthermore, the composite backscattering of the sea surface and ship increases significantly in both HH and VV polarizations when considering the effect of breaking waves under high sea conditions at low grazing angles in the upwind direction, especially for HH polarization. This research offers valuable insights into optimizing radar detection of marine targets in varying sea conditions.

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Section: Introductionmentioning

confidence: 99%

Composite Backscatter Characteristics of Conductive/Dielectric Ships and Sea Surfaces with Breaking Waves under High Sea Conditions

Zhang

2023

Sensors

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“…Another example is that Xu et al [31] conducted a full-wave simulation of bistatic scattering from the wind-sculpted sastrugi surface, which resembles a ridge and corrugated structure and can be modeled as a spatially anisotropic surface. More recently, an efficient hybrid method combining the finite-element boundary-integral method with a fast multipole method (FE-BI-FMM) was proposed to study the EM scattering characteristics from a coated object above a two-layered dielectric rough surface at both vertical and horizontal incidences [32]. In addition, the monostatic and bistatic models of the anisotropic rough soil were recently proposed in [33].…”

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confidence: 99%

Depolarized Scattering of Rough Surface With Dielectric Inhomogeneity and Spatial Anisotropy

Yang

Chen

Yang

et al. 2021

IEEE Trans. Geosci. Remote Sensing

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This article presents a new index, polarizationconversion ratio (PCR) to characterize depolarized bistatic scattering from rough surfaces with dielectric inhomogeneity and spatial anisotropy. We then investigate the dependence of PCR on both surface and radar parameters. Numerical results show that the distribution of PCR on the scattering plane varies with the polarization state of the incident wave and incident angle. The PCR clusters more in the cross-plane for horizontally polarized incidence. However, for vertically polarized incidence, the PCR disperses as "triangular shape" on the whole scattering plane with a sharp valley occurring in the incident plane. The following points can be drawn: 1) the inhomogeneity effectively enhances the PCR in the cross-plane; 2) the effect of anisotropy on the PCR is relatively weak, because the scattering is less affected by correlation length; 3) the impacts of surface rms height on the PCR are negative on the whole scattering plane; and 4) as the background permittivity increases, at the horizontally polarized incidence, the PCR is enhanced in the backward and forward regions, while at vertically polarized incidence, it is enhanced in the incident plane and the forward region. As is demonstrated, the PCR is an effective measure of the sensitivity of depolarization, making it potentially useful as a new reliable index for surface parameter inversion.

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Interpreting the radiative properties of advanced high strength steel strip using a hybrid thin film/geometric optics model

Lin

Pourmajidian

Suleiman

et al. 2022

Journal of Quantitative Spectroscopy and Radiative Transfer

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Efficient hybrid method for electromagnetic scattering from a coated object above a two-layered rough surface

Cited by 4 publications

References 0 publications

Composite Backscatter Characteristics of Conductive/Dielectric Ships and Sea Surfaces with Breaking Waves under High Sea Conditions

Composite Backscatter Characteristics of Conductive/Dielectric Ships and Sea Surfaces with Breaking Waves under High Sea Conditions

Depolarized Scattering of Rough Surface With Dielectric Inhomogeneity and Spatial Anisotropy

Interpreting the radiative properties of advanced high strength steel strip using a hybrid thin film/geometric optics model

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