A new design of cylindrical closed triplate ferrite resonators compared with magnetic wall approximation

Resonant frequencies at strong and weak static magnetic fields of even and odd modes are predicted and observed in a cylindrical metallic cavity containing two ferrite disk resonators separated by a thin circular center conductor. A rigorous electromagnetic analysis, more realistic than a magnetic wall approximation, using low-cost computation, describes the fundamental modes as well as higher order modes. It is therefore a useful tool for the computer-aided design of stripline ferrite disk resonators of the sort used in circulators