Microwave absorbing composite for turbine blade applications

A composite laminate (11) comprising:

• an outer section (15) comprising a plurality of first layers (21) of composite material and at least one functional layer (31) having a printed circuit for absorbing the electromagnetic radiation incident on the composite laminate (11);
• an intermediate section (17) comprising a plurality of second layers (23) of composite material;
• an inner section (19) comprising a conducting layer (41) contiguous to and in contact with the intermediate section (17) and a plurality of third layers (25) of composite material;
• wherein each of the plurality of first, second and third layers comprises fibers and a resin, and wherein the values of the resistivity of the at least one functional layer (31) and the thickness of the intermediate section (17) are comprised in predefined ranges to achieve a desired attenuation of the reflection of electromagnetic radiation of the composite laminate (11) in an S or X band up to a peak of −20 dB.