Phase center far-field calibration method of satellite navigation array antenna

The invention discloses a phase center far-field calibration method of a satellite navigation array antenna. The invention provides an engineering implementation scheme for defining, testing and correcting the phase center of the array antenna. Meanwhile, the far-field accurate calibration of the electric phase center of the array antenna based on the real satellite navigation signal is realized through an original five-degree-of-freedom test turntable based on a microwave darkroom. Finally, the phase center offset and the phase center stability of the array antenna are obtained according to the calibration result of the electric phase center in the form of least square algorithm fitting, and the two parameters are used as parameter input of array antenna beam forming for correction, so that calibration of the phase center of the satellite navigation array antenna is realized. The method is simple and feasible, and has popularization and application values in the field of satellite navigation high-precision m