SCATTERING ANALYSIS OF BURIED OBJECTS BY USING FDTD WITH NONUNIFORM MESHES | Zendy

Min Zhang | Zendy; Cheng Liao | Zendy; Xiang-Zheng Xiong | Zendy; Xiaomin Xu | Zendy

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SCATTERING ANALYSIS OF BURIED OBJECTS BY USING FDTD WITH NONUNIFORM MESHES

Author(s) -

Min Zhang,

Cheng Liao,

Xiang-Zheng Xiong,

Xiaomin Xu

Publication year - 2017

Publication title -

progress in electromagnetics research m

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.216

H-Index - 31

ISSN - 1937-8726

DOI - 10.2528/pierm16112307

Subject(s) - finite difference time domain method , polygon mesh , scattering , computer science , optics , computer graphics (images) , physics

This paper presents a finite-difference time-domain (FDTD) method of the infinite halfspace with nonuniform meshes, aiming to speed up the FDTD calculation of scattering of buried objects. Two 1-D modified FDTD equations are employed to set plane wave excitation of the infinite half-space scattering problems. In order to reduce calculation time and meshes, a method with nonuniform meshes is applied. Fine grids are used for the buried objects and underground while coarse grids are applied for other regions. The 1-D modified FDTD equations with nonuniform meshes are derived, and the settings of total-field/scattering-field (TF-SF) boundary are given. Finally, the proposed method is applied to calculate the transient scattering field of a buried mine. Numerical results demonstrate the validity of the method, and the simulation time is significantly reduced compared to uniform meshes FDTD.

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