一种新的天线空域极化特性远场测量法

摘要

提出一种天线空域极化特性的外场测量方法.该方法引入金属球和二面角两种定标体作为雷达目标进行观测,建立雷达天线波束扫掠目标的回波信号模型.推导了天线空域极化特性的测量方程,通过对同波电压样本的处理和求解获得天线的极化特性,并给出了完整的解析表达式和可用于工程实际的测量步骤.实测数据和仿真实验表明,该方法能有效降低设备量和测量成奉,提高雷达远场预报的逼真度.%Measurement of far-field of antenna is studied in this paper. The proposed method introduces a metallic ball and a dihedral calibrator as radar target for observation. A model is built for the signal received from the antenna that scans the target. A measurement equation for the antenna polarization characteristic is derived. By processing and solving the echo-voltage samples, the polarization characteristics of the antenna are obtained. The analytical expression and practical procedure are presented. Validity of the method is shown by processing of the observation data and simulation. The method can greatly reduce the development complexity and production cost of the field test, and increase fidelity of the predicted far field.