Mode charts for magnetized ferrite cylinders

Waveguide junction circulators using the E- and H-plane technique usually employ height-dependence ferrite modes. The most crucial parameter is the frequency splitting between two angle-dependent modes. It rises with the magnetic bias field until there is a maximum at about saturation. Mode charts are given to help the designer look up the resonance frequencies of the most important modes as a function of the external, measurable field. The unsaturated state of the ferrite material is also covered. These diagrams are in good accordance with experimental experience and have been helpful in interpreting circulator performance, especially for the identification of spurious resonances