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Steady-state response by finite-difference time-domain method and lanczos algorithm

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2 Author(s)
Huang, Ting-Yi ; Dept. of Electr. Eng. & Graduate Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Wu, Ruey-Beei

A hybrid method combining the finite-difference time-domain (FDTD) method and Lanczos algorithm is proposed for efficiently obtaining the steady-state response for closed systems. With the Lanczos algorithm, modes of the FDTD operator can be easily extracted to reconstruct the steady-state response at any time by an analytic formula. With the aid of the time-reversal technique, existing FDTD codes are preserved. Numerical results show that with only very few Lanczos iterations, results of good agreement can be achieved between the proposed method and brute-force FDTD.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:54 ,  Issue: 7 )