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A.W.Glisson,D.Kajfez and J.James,"Evaluation of modes in dielectric resonators
using a surface integral equation formulation," IEEE Trans.Microwave Theory Tech.,Vol.MTT-31,pp.1023-1029,December 1983.

Evaluation of Modes in Dielectric Resonators Using a Surface Integral Equation Formulation
Glisson, A.W.; Kajfez, D.; James, J.;
Microwave Theory and Techniques, IEEE Transactions on , Volume: 83 , Issue: 12 , Dec 1983
pp. 1023 - 1029

Abstract:
A moment method solution procedure for rotationally symmetric dielectric bodies has been applied to isolated cylindrical dielectric resonators, and the frequencies, as well as Q factors due to radiation, have been determined for several of the lowest modes, including those of hybrid type.