3.8 Article

Computation of resonant frequencies and quality factors of cavities by FDTD technique and Pade approximation

Journal

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume 11, Issue 5, Pages 223-225

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/7260.923035

Keywords

cavity; fast Fourier transform; finite-difference time-domain technique; Pade approximation; quality factor; resonant frequency

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The finite-difference time domain (FDTD) technique and the Pade approximation with Baker's algorithm are used to calculate the mode frequencies and quality factors of cavities. Comparing with the fast Fourier transformation/Pade method, we find that the Fade approximation and the Baker's algorithm can obtain exact resonant frequencies and quality factors based on a much shorter time record of the FDTD output.

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