Because radar systems and TV reception are affected by wind turbines, the important development of hybrid-powered BTS (fuel, solar and wind energy) raises questions about possible radio impact between cellular radio signals and the small wind turbines (SWTs) that contribute to BTS supply. SWTs come in a wider variety of designs than bigger wind turbines. In the context of the OPERA-Net2 European project, a new generic parameterized model is developed to support electromagnetic interaction studies. It is notably scalable depending on the SWT nominal power to be considered. Monostatic Radar Cross Section (RCS) calculation in the wind turbine principal planes is done to select among different possible shapes and dimensions. Then an original study of the near field coupling between SWT and BTS panel antenna is carried out.