Resonant frequencies of lossy dielectric spheres excited by delta function electric and magnetic sources

Abstract

The problem of a lossy sphere excited in symmetric TM and TE modes by appropriate delta function sources is considered. The resonant frequencies and the amplitude constants involved in the field components have been computed as functions of both permeability and permittivity of the sphere.

The results have been utilised to verify the frequencies of maximum absorption of biological spheres obtained experimentally.