Abstract
Carbon fiber reinforced unidirectional composite (CFRC) structures were developed by impregnating various dielectric and magnetic nanofillers at a 2% loading concentration of the weight of the matrix. Microwave absorption properties were studied in a broad frequency range of 0.1–13.6 GHz covering the L, S, C, and X frequency ranges. The variation of radar absorption properties with frequency were studied in detail. The effect of dielectric and magnetic materials on microwave absorption properties was also investigated. The results shows that the microwave absorption properties increases with increasing the measuring frequency and maximum absorption was at X frequency range (8.2–12.4 GHz). The Dielectric nanoparticles showed better absorption properties compared with magnetic nanoparticles. Among dielectric nanoparticles, silicon carbide showed maximum reflection loss properties of −15.32 dB with an absorptance value of 97.06%. Among magnetic nanoparticles, ferric oxide showed a maximum reflection loss of −9.14 dB with an absorptance value of 87.81%. The addition of nanoparticles significantly improved the complex permittivity, permeability, and loss tangent properties.
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