Electromagnetic Scattering by Multiple Columns Partially Buried in a Ground Plane

Ren, Xingang; Zhao, Ye; Zhu, X. D.

doi:10.1155/2017/8101509

Cited by 10 publications

(2 citation statements)

References 27 publications

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“…Xu R W [3] adopted FEM/BIM to compute the electromagnetic scattering from multiple objects above a 1D rough surface. Ren, X C [4] analyzed the electromagnetic scattering characteristic from multiple columns partially buried in a 1D ground plan by FDTD. Tian W [5] and Li B [6] computed the composite electromagnetic scattering from multiple columns above a 1D conducting rough surface based on the coupling MoM-PO.…”

Section: Introductionmentioning

confidence: 99%

Accelerated Hybrid Method for Electromagnetic Scattering From Multiple Complex Targets Above a Rough Surface

et al. 2021

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A hybrid scheme that combines the pre-corrected fast Fourier transform (p-FFT) and iterative Kirchhoff approximation (IKA) is developed to solve the electromagnetic scattering from multiple complex targets above a three-dimensional (3D) rough surface. Based on the domain distribution method (DDM), multiple targets are divided into an FFT region, and the rough surface is divided into an IKA region. Scattering on the FFT region and IKA region is calculated by p-FFT and IKA, respectively. In addition, iterative strategies are considered in both solving interaction between facets in the IKA region and interactions between FFT region and IKA region. However, interactions between FFT region and IKA region are the most time-consuming in the entire computational process. To overcome this computational bottleneck, the combined multilevel fast multipole algorithm (MLFMA), ray-propagation fast multipole algorithm (RPFMA) and fast far-field approximation (FAFFA) are incorporated into interactions between FFT region and IKA region. They accelerate the matrix vector multiplication by "interpolation -translation -anterpolation", while their translators are different, which result in their different computation efficiencies and application conditions. To effectively combine these three algorithms, the IKA region is divided into MLFMA area, RPFMA area and FAFFA area according to the distance, where interactions between these areas and the targets are accelerated by MLFMA, RPFMA and FAFFA, and the surface outside these areas is discarded. Compared with MLFMA, the accuracy and efficiency of this hybrid method are verified.INDEX TERMS composite electromagnetic scattering, multiple targets above surface, accelerated technique.

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Section: Introductionmentioning

confidence: 99%

Accelerated Hybrid Method for Electromagnetic Scattering From Multiple Complex Targets Above a Rough Surface

et al. 2021

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“…With the extensive application of the wide-band radar, the transient electromagnetic (EM) scattering from the rough surface has gained increasing attention, which plays important role in the field of radar surveillance, EM imagining, target identification, and stealth, etc. [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

A Novel Hybrid Algorithm for Transient Near-Field Scattering from Rough Surface in 2-D Case

Tian

Wei

Yang

2021

International Journal of Antennas and Propagation

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A novel hybrid algorithm is proposed to reduce the computation cost of the finite-difference time-domain (FDTD) method in calculating the transient near-field scattering from rough surface. The scattering problem is split into the FDTD calculation of equivalent sources on the contour enclosing rough surface and the calculation of the near-field radiation with the two-dimensional (2-D) time-domain Huygens’ principle. The radiation fields are found from a surface integral of the temporal convolution for which the direct numerical integration of the convolution is computationally expensive. In this paper, the 2-D time-domain Green’s function as the convolution kernel is approximated with a sum of exponential terms by using the Prony’s method. Then, the semianalytical recursive convolution (SARC) approach is applied to complete the update of the near-field radiation. Compared with the traditional FDTD, this hybrid algorithm can significantly reduce the memory usage and run time, especially for the large distance between the rough surface and observation point.

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An efficient method for analysis of electromagnetic scattering from a 3-D coated object half-buried in PEC rough surface

Zhang

2023

Electromagnetics

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Electromagnetic Scattering by Multiple Columns Partially Buried in a Ground Plane

Cited by 10 publications

References 27 publications

Accelerated Hybrid Method for Electromagnetic Scattering From Multiple Complex Targets Above a Rough Surface

Accelerated Hybrid Method for Electromagnetic Scattering From Multiple Complex Targets Above a Rough Surface

A Novel Hybrid Algorithm for Transient Near-Field Scattering from Rough Surface in 2-D Case

An efficient method for analysis of electromagnetic scattering from a 3-D coated object half-buried in PEC rough surface

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