Integration equation analysis on resonant frequencies and quality factors of rectangular dielectric resonators

In this paper, the resonance problem of rectangular dielectric resonators ( DRs) is analyzed by using the spectral dyadic Green's function and volume i ntegral-equation formulation. The rectangular dielectric body is replaced b y a set of entire-domain polarized volume current basis, and Galerkin's mom ent method is used to solve the resonant frequency and quality factor of th e rectangular DR. The effects of electrical and geometrical parameters on t he resonance of the TE111 mode of isolated DRs are also presented. Addition ally, the case of a rectangular DR with a ground plane is also discussed. R esults are found to be in good agreement with the published experimental da ta.