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International Journal of Antennas and Propagation
Volume 2014, Article ID 386315, 9 pages
Research Article

A Numerical Method for Analyzing Electromagnetic Scattering Properties of a Moving Conducting Object

School of Information Science and Technology, East China Normal University, Shanghai 200241, China

Received 19 October 2013; Revised 1 January 2014; Accepted 15 January 2014; Published 23 February 2014

Academic Editor: Gaobiao Xiao

Copyright © 2014 Lei Kuang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A novel numerical approach is developed to analyze electromagnetic scattering properties of a moving conducting object based on the finite-difference time-domain (FDTD) algorithm. Relativistic boundary conditions are implemented into the FDTD algorithm to calculate the electromagnetic field on the moving boundary. An improved technique is proposed to solve the scattered field in order to improve the computational efficiency and stability of solutions. The time-harmonic scattered field from a one-dimensional moving conducting surface is first simulated by the proposed approach. Numerical results show that the amplitude and frequency of the scattered field suffer a modulation shift. Then the transient scattered field is calculated, and broadband electromagnetic scattering properties of the moving conducting surface are obtained by the fast Fourier transform (FFT). Finally, the scattered field from a two-dimensional moving square cylinder is analyzed. The numerical results demonstrate the Doppler effect of a moving conducting object. The simulated results agree well with analytical results.