Mode characteristics in a circular chiral ferrite dielectric waveguide

A circular dielectric waveguide with magnetically biased chiral ferrite materials in both the core and the cladding is introduced. The relations between the transverse electromagnetic field components and the longitudinal ones are derived in circular cylindrical coordinates. The coupled wave equations for the longitudinal field components are solved analytically and the eigenequation for general circular chiral ferrite dielectric waveguide is established. Mode characteristics including the cutoff, dispersion, and field distributions are investigated. The numerical results show that not only the cutoff frequencies but also the dispersion curves of HE and EH modes with the same mode number separate, and the ferrites and chiralities in the core and the cladding have different effects on the propagation characteristics