Resonant frequency calculation for inhomogeneous dielectric resonators using volume integral equations and face-centered node points

摘要

The face-centered node-point technique, developed earlier for scattering applications, is applied to the calculation of resonance frequencies of inhomogeneous dielectric resonators. The described method leads to a well-conditioned matrix system suitable for numerical solution, which is not the case when the permittivity is high and conventional solution techniques (e.g., pulse functions with cell-centered point matching) are employed. In this work, we concentrate on resonators baring the shape of a parallelepiped. for which there are relatively few computational results in the literature, although the method can accommodate arbitrarily shaped structures.