Quasi-optical feed network system and error testing method

The application provides a quasi-optical feed network system. The system includes a common reference framework, a quasi-optical feed network subsystem and a calibration subsystem. The common referenceframework is assembly reference of the quasi-optical feed network subsystem and the calibration subsystem. The quasi-optical feed network subsystem is integrated inside a quasi-optical framework. Thequasi-optical framework is fixedly connected with the common reference framework. The calibration subsystem is integrated inside a calibration framework. The calibration framework is fixedly connected with the common reference framework. According to assembly accuracy detection of the quasi-optical feed network system, a laser tracker is used to measure three orthogonal reference planes on the common reference framework to establish a measurement coordinate system, a quasi-optical framework coordinate system and a calibration framework coordinate system are sequentially established through respectively measuring three