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Piecewise linear recursive convolution for dispersive media using FDTD

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2 Author(s)
Kelley, D.F. ; Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA ; Luebbers, R.J.

Electromagnetic propagation through linear dispersive media can be analyzed using the finite-difference time-domain (FDTD) method by employing the recursive convolution (RC) approach to evaluate the discrete time convolution of the electric field and the dielectric susceptibility function. The RC approach results in a fast and computationally efficient algorithm; however, the accuracy achieved is not generally as good as that obtained with other methods. A new piecewise linear recursive convolution (PLRC) method is described here that has greatly improved accuracy over the original RC approach but retains its speed and efficiency advantages

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Antennas and Propagation, IEEE Transactions on  (Volume:44 ,  Issue: 6 )