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A three-dimensional angle-optimized finite-difference time-domain algorithm

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2 Author(s)
Shumin Wang ; Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA ; Teixeira, F.L.

We present a three-dimensional finite-difference time-domain (FDTD) algorithm to minimize the numerical dispersion error at preassigned angles. Filtering schemes are used to further optimize its frequency response for broad-band simulations. A stability analysis of the resulting FDTD algorithm is also provided. Numerical results show that the dispersion error around any preassigned angle can be reduced significantly in a broad range of frequencies with small computational overhead.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:51 ,  Issue: 3 )