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Z-transform theory and FDTD stability

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2 Author(s)
Abdijalilov, K. ; New Jersey Inst. of Technol., Newark, NJ, USA ; Grebel, Haim

In this paper we analyze the stability and the accuracy of finite-difference time-domain (FDTD) algorithms using Z-transform technique. Conventional time-staggered approximation of the time-derivative is replaced by a rational transfer function discrete-time filter. Then a generalized formulation of the FDTD time-stepping is presented. Finally, we show that it is possible significantly reduce the time-sampling error of FDTD algorithm by properly choosing the transfer function coefficients.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:52 ,  Issue: 11 )

Date of Publication:

Nov. 2004

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