大型相控阵天线唯幅度测量快速标校法

针对目前大型相控阵天线校准时效不佳问题,研究了一种唯幅度测量快速标校方法。对于N元相控阵天线,该方法将阵面分为N种不同组合,通过测量每种组合在不同相态和开关态下的总辐射场幅度,由测量值解算出各个天线单元幅相值。该标校方法仅需幅度测量,并且所需的测量次数只有(3N+1)次,因此,设备可大大提高大型相控阵天线的校准速度以及简化校准设备;另外,在求解天线单元幅相值过程中,该标校方法可避免方程二义性问题,从而简化计算过程。768元相控阵天线仿真实例验证了该标校方法的正确性。

Fast Calibration Method for Large-scale Phased Array Antennas with Only Amplitude Measurements

A fast calibration method based on only amplitude measurements was proposed for speeding up large-scale phased array antennas calibration.For an N -element phased array antenna,it is divided into N groups.And then the radiation field amplitude of each group can be measured under different phase and switch conditions.Finally,the phase and amplitude distribution can be calculated using those amplitude measurements.The proposed method only needs the amplitude measurements and the measurement amount is (3 N +1) times,which reduces the calibration time and simplifies the required devices remarkably for a large-scale phased antenna.Additionally,for the element phase and amplitude calculation,the proposed method can avoid the equation ambiguity,simplifying the calculation process.A 768-element phased array antenna example illustrates the validity of the proposed method.