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相控阵天线由于单元间互耦、器件的制造、组装误差、老化、热变形和组件更换的影响而产生幅相误差 ,必须进行校准和补偿。文中提出一种新的校准方法 ,先在相同的频率和环境条件下分别进行 FFT外校准和初次 FFT内校准确定内外场校正系数 ,然后在雷达使用期间只需作天线 FFT内校准就可获得理想的精度。用一 2 4单元实验阵列对此作了实验验证。此方法具有低设备量和高校准精度 ,适用于一维、二维相控阵雷达 ,尤其适合于机载或地面机动型相控阵雷达
Phased array antennas suffer from amplitude and phase errors due to mutual coupling between cells, device fabrication, assembly errors, aging, thermal deformation, and component replacement that must be calibrated and compensated. In this paper, a new calibration method is proposed. First, FFT external calibration and initial FFT internal calibration are used to calibrate the internal and external field calibration coefficients respectively under the same frequency and environmental conditions. Then the ideal The accuracy. This was experimentally validated with a 24-unit experimental array. This method has low equipment capacity and high calibration accuracy, suitable for one-dimensional and two-dimensional phased array radar, especially suitable for airborne or ground mobile phased array radar