Blackbody emissivity measuring system of microwave radiometer

The utility model discloses a microwave radiometer blackbody emissivity measuring system, which comprises a reflector antenna driven by a servo system to rotate, a calibration box arranged at the top of the reflector antenna, a blackbody installed in the calibration box, a calibration blackbody arranged at the bottom of the reflector antenna, and a blackbody temperature measuring sensor installed on the calibration blackbody. The K/V feed source receives signals of the reflector antenna, and the K/V receiver comprises a noise source, a switch, a coupler and a signal processing circuit. According to the measuring system and the measuring method disclosed by the utility model, the problems that the accuracy of the blackbody emissivity of the existing ground microwave radiometer is poor, the blackbody emissivity cannot be measured during normal operation, and the brightness temperature is inaccurate due to the change of the blackbody emissivity along with time during real-time calibration are solved. 本实用新型公开了一种微