On the study of comparative analysis of dielectric loaded effects for rectangular cavity resonators

In this paper, a comparison study of dielectric loaded effects of rectangular resonant cavity in terms of resonance frequency, dielectric loading rate and various dielectric constant for different TE^y and TM^y modes is presented. This study includes two stage analysis procedures. Firstly, field expressions and resonance frequency of the dielectric loaded rectangular resonant cavity with respect to dielectric loading rate are obtained for different TE^y and TM^y modes by using semi-analytical approach. Secondly, perturbation method is applied for acquiring resonance frequency of each chosen different mode and dielectric constant with respect to dielectric loading rate. Comparison of two different method in terms of variation of resonant frequency with respect to relative dielectric thickness is performed for different dielectric loading case for the same mode and different modes for the same dielectric loading. The results show that perturbation approach can be good alternative to semi-analytical method to calculate the variation of the resonant frequency with respect to relative dielectric thickness.