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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2017-02-09
Scattering Analysis of Buried Objects by Using FDTD with Nonuniform Meshes
By
Min Zhang,

    Dr. Min Zhang

    Institute of Electromagnetics

    Southwest Jiaotong University

    China

    Homepage

Cheng Liao,

    Dr. Cheng Liao

    Southwest Jiaotong University

    China

    Homepage

Xiang-Zheng Xiong,

    Dr. Xiang-Zheng Xiong

    Institute of Electromagnetics

    Southwest Jiaotong University

    China

    Homepage

Xiaomin Xu

    Dr. Xiaomin Xu

    Institute of Electromagnetics

    Southwest Jiaotong University

    China

    Homepage

Progress In Electromagnetics Research M, Vol. 54, 83-90, 2017
doi:10.2528/PIERM16112307 | Google Scholar

Abstract
This paper presents a finite-difference time-domain (FDTD) method of the infinite half-space 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 nouniform 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 when compared with uniform meshes FDTD.
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Citation
Min Zhang, Cheng Liao, Xiang-Zheng Xiong, and Xiaomin Xu, "Scattering Analysis of Buried Objects by Using FDTD with Nonuniform Meshes," Progress In Electromagnetics Research M, Vol. 54, 83-90, 2017.
doi:10.2528/PIERM16112307
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