Analysis of wind turbines radar cross section for analyzing the potential impact on weather radars

A comprehensive characterization of the radar cross section (RCS) patterns of wind turbines is conducted, by applying Physical Optics approximation and considering specific conditions applicable to the potential impact on weather radars. Results show that monostatic RCS patterns of wind turbines present a significant main lobe generated by the mast of the turbine, perpendicular to the mast surface, extremely directive in the vertical plane, with symmetry with respect to the vertical axis of the mast. Secondary lobes caused by other parts of the turbine are identified, all of them of lower amplitude (at least 10 dB lower). Outcomes of the analysis allow the development of simplified calculation methods of the scattered signals and the potential impact of wind turbines.