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2017-02-09

Scattering Analysis of Buried Objects by Using FDTD with Nonuniform Meshes

By Min Zhang, Cheng Liao, Xiang-Zheng Xiong, and Xiaomin Xu
Progress In Electromagnetics Research M, Vol. 54, 83-90, 2017
doi:10.2528/PIERM16112307

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.

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
http://jpier.org/PIERM/pier.php?paper=16112307

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