An Amplitude-phase Measurement Method of Phased Array Antenna Based on Self-Calibration RF Channel

Caused by the amplitude-phase error of phased array antenna, the pattern performance unable to meet the optimum design results. Thus, the phase and amplitude of phased array antenna should be measured and calibrated. An measurement method of phased array antenna based on self-calibration RF channel is presented in this paper. First of all, the initial amplitude-phase is measured by self-calibration RF channel. Secondly, the modified value related to self-calibration RF channel is achieved by use of Mid-field receiving power calculation method. Finally, the actual amplitude and phase weighting factor of phased array antenna is obtained, based on calibration of the initial amplitude-phase with the modified value. The comparison of planar near-field measured results show that the proposed method is feasible and efficient.