科研之友
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摘要
In this article, a three-dimensional (3-D) Crank-Nicolson finite-difference time-domain (CN-FDTD) method combined with conformal mapping method is used to analyze the cavities with curved surface. The improved formalism in the CN-FDTD is described and both time-domain waveforms and resonant frequencies are presented. The numerical simulations of the typical examples show that the time step with this CN-FDTD method is 10 times larger than the Courant-Friedrich-Levy condition without the large loss of accuracy.
