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A finite-difference time-domain algorithm optimized for arbitrary propagation angles

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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 two-dimensional higher order FDTD algorithm to minimize the numerical dispersion error at arbitrary, preassigned angles. Filtering schemes are further employed to optimize the FDTD frequency response at a given frequency range. A stability analysis of the resulting FDTD algorithms is included. Numerical dispersion properties are compared against Yee's scheme and a higher order (2,4) FDTD scheme. Numerical results demonstrate that the dispersion error around a preassigned angle (and, with filtering, around a frequency band of choice) can be significantly reduced.

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Antennas and Propagation, IEEE Transactions on  (Volume:51 ,  Issue: 9 )