A Self-Calibration Methodology for Phased Array Antenna

This article proposes a self-calibration methodology for phased array antenna, which constructs a calibration base group of three units: a reference unit, an auxiliary unit, and a unit to be calibrated. Then, this work uses the practical electromagnetic parameters, introduces the concept of state, and utilizes reverse phase detection to enable faster calibration speeds and higher calibration accuracy. Furthermore, in the calibration process, this work carries out the cascade path optimization, which establishes the adjacency matrix between the antenna units and uses Dijkstra’s algorithm to compute the shortest cascade path between the reference antenna unit and the antenna unit to be calibrated so that greatly reduces the cascade error and improves the calibration accuracy. Using this methodology, there is a standard deviation error of about $1.4^{\circ}-1.8^{\circ}$ in the absence of Gaussian noise interference, and there is a standard deviation error of about $2.5^{\circ}-4.5^{\circ}$ in the averaging of multiple calculations in the presence of Gaussian noise interference.