A map displaying the matching characteristics and absorption performance for the metallic carbonyl iron composite in microwave frequency band is developed based on the origin of absorption peaks. In this map, the dependence of matching frequency fm on absorber thickness, input impendence, and absorption peak value is achieved simultaneously from the complex permeability and permittivity spectra without any approximation. From this map, the perfect matching frequency fpm and perfect matching thickness tpm at input impendence Z = 1 can be directly searched. Moreover, the required absorber thickness and the reflection loss value at any expected frequency where the absorption peak locates can be directly observed.
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Wang et al. (2014) studied this question.
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