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Finite difference time domain analysis on electromagnetic scattering characteristic of plasma thin layer based on surface impedance boundary condition method

Yang Li-Xia Ma Hui Shi Wei-Dong Shi Li-Juan Yu Ping-Ping

Finite difference time domain analysis on electromagnetic scattering characteristic of plasma thin layer based on surface impedance boundary condition method

Yang Li-Xia, Ma Hui, Shi Wei-Dong, Shi Li-Juan, Yu Ping-Ping
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  • Received Date:  14 June 2012
  • Accepted Date:  11 July 2012
  • Published Online:  05 February 2013

Finite difference time domain analysis on electromagnetic scattering characteristic of plasma thin layer based on surface impedance boundary condition method

  • 1. Department of Communication Enginerring, Jiangsu University, Zhenjiang 212013, China;
  • 2. Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China;
  • 3. Department of Physics, Jiangsu University, Zhenjiang 212013, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant No. 61072002), the Ph.D. Programs Foundation of Ministry of Education of China (Grant No. 20093227120018), Elitist of Liu-Da Summit Project in Jiangsu Province at 2011 (Grant No. 2011-DZXX-031), and Postdoctoral Science Foundation in Jiangsu (Grant No. 1201001A).

Abstract: Using the surface impedance boundary condition (SIBC)-finite difference time domain (FDTD) method, the electromagnetic scattering characteristic of non-magnetized plasma coating on metal material is obtained, under the one-dimensional (1D) oblique incident wave condition. The SIBC method can greatly reduce computational memory by ignoring the mesh division of the background material. Firstly, the expression of frequency domain surface impedance is derived, and substituted into boundary condition equation. Then the equation is transformed to time domain via Fourier inverse transformation method, and the formula is quantized to obtain the update equation by piecewise linear recursive convolution (PLRC) method. The algorithm is used to calculate the reflection coefficients of parallel and vertical polarization waves at oblique incident angels. The comparison of the SIBC-FDTD results with analytic solutions shows the validation and effectiveness of proposed method. Finally, the effect of incident angle on reflection coefficient is analyzed by this method.

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