Abstract:Phased array calibration is crucial to ensure accurate array beam direction and radiation pattern. The calibration method can be divided into far-field calibration and near-field calibration according to the measurement distance. With the development trend of large-scale array antennas, it is increasingly difficult for the anechoic chambers to meet the far-field requirements of array antennas. The applicability of far-field calibration methods gradually weakens, while the demand for near-field calibration methods gradually increases. This article combs traditional near-field calibration methods and discusses the latest near-field calibration methods. The principles and features of different calibration methods are analyzed and compared, and finally an outlook for future development directions is proposed.