Dipolar resonances in the plane-wave scattering by an axially magnetized ferrite column with a perfectly conducting core

The scattering of E-polarized plane waves by an infinitely long, axially magnetized ferrite cylinder with a perfectly conducting cylindrical core at its center is investigated for the case in which the radius of the ferrite column is small in comparison with the wavelength of the incident wave. The total scattering cross section is found to have maxima at two resonant frequencies whose approximate expressions in terms of the physical parameters are deduced. The dependence of the sharpness of the resonances on the radius of the ferrite column is also examined.