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Abstract
An improved shift operator finite-difference time-domain （SO-FDTD） method for general dispersive medium based on the implementation of infinite impulse response filter in digital signal processing technique is presented. Compared with the commonly used SO-FDTD, the storage variables in the improved SO-FDTD are reduced by 33% and computational efficiency is also increased. Finally, the generality and the feasibility of the presented scheme are validated by calculations of scattering by first order and second order dispersive objects.

Keywords:
finite-difference time-domain/

dispersive media/

shift operator
Authors and contacts
Zhang Yu-Qiang²,

Ge De-Biao¹
References

Cited By

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Vol. 58, Issue 12 - 2009-06-20

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