The invention provides a composite laminate comprising an outer, an intermediate and an inner section comprising, respectively, first layers of composite material and one or more functional layers having a printed circuit for absorbing the electromagnetic radiation incident on the composite laminate; second layers of composite material; a conducting layer contiguous to the intermediate section and third layers of composite material. The values of the resistivity of the functional layer and the thickness of the intermediate section are comprised in predefined ranges for the attenuation of the reflection of electromagnetic radiation of the composite laminate in the S or X bands up to a peak of 20 dB. The invention also refers to manufacturing methods of the composite laminate (11) and to wind turbine blades including the composite laminate.

A wind turbine blade having at least two blade modules extending in the spanwise direction of the blade and being configured for connection end-to-end at a connection joint An electromagnetic shield is positioned in electrically conductive contact with the blade modules and extending across the connection joint in the spanwise direction.

A wind turbine blade having a Radar Absorbing Material (RAM) and a lightning protection system arranged for guaranteeing the performance of the lightning protection system and the integrity of the RAM. The lightning protection system comprises lightning receptors located at a tip region and one or two down-conductors disposed inside of the wind turbine blade for driving lightning current to ground. The RAM covers the entire wind turbine blade except the tip region and comprises at least a functional layer and a reflector layer connected to the one or two down conductors by way of auxiliary cables.