Analysis of the differential phase shift in the circular ferrite-dielectric waveguide with azimuthal magnetization

Employing an iterative approach, the differential phase shift provided by the circular waveguide, containing an azimuthally magnetized coaxial ferrite cylinder, surrounded by a dielectric toroid, is computed in normalized form for normal TE₀₁ mode. The method uses the positive purely imaginary roots of the complex characteristic equation of the structure, derived in terms of the complex Kummer and the real cylindrical functions, determined, varying the imaginary part of the first complex parameter of the Kummer function. The results are presented in tabular and numerical form and discussed.