Phase characteristics of the circular waveguide with an azimuthally magnetized ferrite cylinder and a dielectric toroid

It is supposed that the circular waveguide, containing a co-axially positioned ferrite cylinder of azimuthal magnetization, surrounded by an isotropic dielectric toroid that supports normal TE0n modes, might provide an increased value of the differential phase shift, compared to the one, entirely filled with ferrite, if the size of the anisotropic area is suitably chosen. Due to the great number of parameters involved, the study of the phase characteristics of this geometry is a cumbersome task. To facilitate it, the discussion has been confined to the case in that the relative permittivities of both media are equal (G.N. Georgiev and M.N. Georgieva-Grosse, Proc. 2010 IEEE AP-S Int. Symp. Antennas Propagat. & CNC-USNC/URSI Radio Science Meeting, Toronto, ON, Canada, ID 330.9, 2010; G.N. Georgiev and M.N. Georgieva-Grosse, Proc. 6th Europ. Conf. Antennas Propagat. EuCAP, Prague, Czech Republic, 1141–1145, 2012; M.N. Georgieva-Grosse and G.N. Georgiev, Proc. Sixteenth Int. Conf. Electromagn. Adv. Applicat. ICEAA′14, Palm Beach, Aruba, 1290–1293, 2014; G.N. Georgiev and M.N. Georgieva-Grosse, In: L. Rocha and G. Mateus (Eds.), Wave Propagation: Academy Publish, Cheyenne, Wyoming, USA, 161–196, 2014).