X-band microwave characterisation and analysis of carbon fibre-reinforced polymer composites

In this paper, a detailed investigation of the electromagnetic (EM) properties of carbon fibre-reinforced polymer composites (CFRP) is presented. The electric permittivity, electrical conductivity, signal penetration and microwave absorption are discussed. Unidirectional composite laminate samples were characterised over X band (8–12 GHz) using the microwave transmission line technique. It is shown that the real part of the permittivity of the...