Ferrites in microwave applications

Since Hogan's* exposition of the extreme usefulness of the microwave Faraday effect numerous other laboratories have begun investigating propagation through ferrites and have made significant contributions to the art. In view of the tremendous interest which is being accorded this work this paper has been prepared to summarize some of the observations and developments to date. The plane wave theory is reviewed briefly with special attention being given to the mechanisms by which power is absorbed by the ferrite. The plane wave theory is then modified to describe various waveguide effects. Finally experimental procedures and results are presented to illustrate the theory and to provide general information regarding the design of devices employing these effects.