The finite difference time-domain (FDTD) method applied to the computation of resonant frequencies and quality factors of open dielectric resonators

Abstract

This paper analyzes dielectric resonators using the FDTD method. Resonant frequencies and quality factors are calculated using Prony's method instead of the classical FFT method; in this way, reductions of up to two orders of magnitude are achieved in computation time. The results obtained for both open and shielded resonators are in good agrement with those reported by other authors, and the results for shielded resonators also agree with those obtained with the mode matching method