A model for ferrite-loaded transversely biased coaxial resonators

This work describes a simple model for shortened coaxial cavity resonators with transversely biased ferrite elements. The ferrite allows the resonance frequency to be tuned, and the presented model provides a method of approximately calculating these frequencies to generate the tuning curve in short computation times. A test case resonator is specified, processed by the method, and constructed. Model predictions are compared to the measurement data as well as HFSS simulations. The model is also used for deducing maximum tuneability conditions on resonator parameters.