Partial treatment of wind turbine blades with radar absorbing materials (RAM) for RCS reduction

The application of radar absorbing materials (RAM) in order to reduce the interference of wind farms with radar systems is considered as a possible mitigation solution. This paper will address the key challenges when trying to efficiently apply RAM to certain parts of the wind turbine blades to significantly reduce the scattering of radar signals. Modeling of the radar cross-section (RCS) is presented for a generic 40 meter blade wind turbine before and after applying RAM to different parts of the blade. The results of modeling possible solutions of partially RAM treated blades are compared.