A systemized parameter set applicable to microwave absorption for ferrite based materials

When electromagnetic waves are absorbed by materials, the most significant factor is the resistance to the induced current and the induced oscillations of electric and magnetic dipoles in the material. In this paper, a set of related parameters has been integrated into a theoretical system to characterize electromagnetic wave absorption from materials and to reveal the connection of the different physical processes for wave absorption. The parameters used are all associated with imaginary numbers. The system is general and can be applied to the important ferrite based materials. The system characterizes absorption that is common to a variety of physical processes. A problem found in the literature concerning the measurement of reflection loss has been corrected.