Wind turbine blade comprising a lightning protection system equipped with radar absorbing material

A wind turbine blade (10) comprising a lightning protection system and shells (13,15) made of a composite material including Radar Absorbing Material;

• the lightning protection system comprising one or more lightning receptors (21, 21′, 21″) and one or two down-conductors (23, 23′) disposed inside of the wind turbine blade (10) for driving lightning current to ground;
• the Radar Absorbing Material comprising at least a functional layer (31) and a reflector layer (33) in a laminate of the shells (13, 15);
• characterized in that:
• the Radar Absorbing Material covers the entire wind turbine blade (10) except a tip region (12) located between an end of the blade and a cross section at a radius R having a length ranging from 80-90% of a length of the wind turbine blade;
• the lightning receptors (21, 21′, 21″) are located at the tip region (12);
• the reflector layer (33) of each of the shell (13, 15) is connected to the one or two down conductors (23, 23′) in at least two cross sections at radiuses R1, R2 having a length ranging, respectively, from 0-20% and 80-90% of the length of the blade by means of auxiliary cables (29, 29′).