DETERMINATION OF RESONANT FREQUENCIES OF SHIELDED CIRCULAR RING RESONATORS WITH THICK STRIP CONDUCTORS

In this paper, boundary integral equations are derived from the Green' s identity of the second kind in circular cylindrical coordinates, and are applied to determine the resonant frequencies of shielded circula r ring and disk resonators. The integral equations are numerically sol ved by discretizating the integration path representing the air-dielec tric interface and the surface of thick strip conductor. Because of th e choice of the eigen-functions as weighted functions instead of Green 's functions, the overall integral path length is shortened and comput ational time is reduced. Computational results on thick circular disk and ring resonators are compared with other available numerical result s and experimental data.