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An FDTD combined with semi-analytical recursive convolution algorithm for the analysis of general dispersive media

Ge De-Biao Zhang Yu-Qiang

An FDTD combined with semi-analytical recursive convolution algorithm for the analysis of general dispersive media

Ge De-Biao, Zhang Yu-Qiang
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  • Received Date:  28 November 2008
  • Accepted Date:  09 December 2008
  • Published Online:  20 July 2009

An FDTD combined with semi-analytical recursive convolution algorithm for the analysis of general dispersive media

  • 1. (1)西安电子科技大学理学院物理系,西安 710071; (2)西安电子科技大学理学院物理系,西安 710071;延安大学物理与电子信息学院,延安 716000

Abstract: A novel finite-difference time-domain (FDTD) method combined with the semi-analytical recursive convolution (SARC) algorithm in DSP techniques for the analysis of electromagnetic characteristics in dispersive media is presented. In this method, the flexibility of FDTD in dealing with complicated objects is retained, while the advantages of absolute stability, high accuracy, low storage and high effectiveness of SARC in treating the linear system problem is introduced. The proposed SARC FDTD approach can therefore be applied to the analysis of general dispersive media provided the poles and corresponding coefficients in the dispersive medium model of interest are given. Three typical kinds of dispersive model, i.e. Debye, Drude and Lorentz medium are tested to demonstrate the feasibility of the present scheme.

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