Property Improvement for Microwave Absorbing Slabs by Adding Conductive Grains

Abstract

The possibility of improving microwave absorption ability for magnetic slabs by adding conductive grains was analyzed within the theory of effective medium. It was found that pure magnetic slabs cannot mediate the contradiction between high absorption ability and high reflection property. Gradient magnetic structure cannot improve the absorption either. Adding conductive grains, however, can simultaneously improve the matching effect and absorption ability of slabs. This result means some methods for fabricating high absorption slabs.