Microwave absorption by conductor-loaded dielectrics

A theoretical model to predict the microwave absorption by a conductor-loaded dielectric is developed. The microwave power transmission coefficient of the test material is derived in terms of the effective conductivity and permittivity parameters (of the composite material) as a function of volume fraction of the conductor loading. The absorption/transmission characteristics of the test material versus volume fraction of metal loading are described by three distinct regimes having low-loss, lossy and metal-like characteristics. Theoretical predictions are comparable with the measured data pertinent to an iron-plus-dielectric material.<
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