Abstract
The interference of Doppler echoes caused by rotating wind turbines is a major concern for meteorological institutes in the proper operation of weather radar stations. While research is ongoing to characterise this interference by means of simulation or measured data of pulsed radar system, this paper addresses measurements with FMCW signals. Most weather radar stations are operated in the C-Band (5.6 GHz). For the characterisation of wind turbines, a portable, flexible and economic design of an bi-static FMCW radar is presented. Initial measurements show adequate spatial resolution and sensitivity. The architecture is using IQ-mixing allowing complex signal processing of the baseband signal.