Topics in Guided-Wave Propagation in Magnetized Ferrites

Contributions of various authors to the linear theory of propagation in magnetized ferrites are briefly reviewed. Modes of propagation are discussed for the cases where a static magnetic field is applied to a ferrite in directions parallel and perpendicular respectively to the direction of propagation of the microwave field. Various properties of propagation are described for waveguides of rectangular or circular cross section which are either partially or completely filled with ferrites. Emphasis is placed on those characteristics of propagation in ferrite media which are in contrast with those obtained in conventional media. Unusual types of mode "cutoffs" are described, as well as various nonreciprocal propagation properties resulting from the particular type of anisotropy which is present in a magnetized ferrite. The review closes with a brief discussion of some results obtained by perturbation methods.