Analysis of Dielectric Resonators Using the FDTD Method Combined with the Pade Interpolation Technique

Zhewang MA  Yoshio KOBAYASHI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E84-C   No.7   pp.973-976
Publication Date: 2001/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on Techniques for Constructing Microwave Simulators--Design and Analysis Tools for Electromagnetic Fields, Circuits, and Antennas--)
Category: 
Keyword: 
dielectric resonator,  FDTD method,  Pade approximation,  interpolation method,  

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Summary: 
The finite-difference time-domain (FDTD) method incorporating Berenger's PML absorbing boundary condition is developed to model three-dimensional dielectric resonators. The fast Fourier transform (FFT) coupled with the Pade interpolation technique is employed to obtain frequency domain results with satisfactory resolution and accuracy, and to reduce the computation time significantly compared with that needed when the conventional FFT algorithm is used. Computed resonant frequencies of two types of cylindrical dielectric resonators are compared with theoretical and measured results. A good agreement is observed.