天线相位中心的精确测量方法研究

Research on the accurate measurement method for the antenna phase center

以天线相位方向图实测数据为基础,通过改变参考点,建立相位偏差与相位中心位置偏差的关系式,并利用最小二乘法估算天线相位中心偏差.研制了一套实际测试系统,通过实际测试和理论误差分析表明,该方法能够精确测量天线相位中心,测量精度小于1 mm.

Based on the measured radiation pattern data of the antenna, a ralationship between phase offset and positional deviation of the phase center is founded by means of changing the reference point. Using the least square method, we can compute the phase center deviation for the antenna. Finally, a suit of test system is developed. The measured result and the error analysis indicate that the proposed method can accurately measure the phase center of the antenna,with the measuring accuracy less than lmm.