对一部待测、待评估的天线,其交叉极化特性实际上是依赖于极化基的,极化基匹配或失配情况下,得到的交叉极化性能评估结果也不一样。文中首先建立了天线极化特性测量模型,推导了交叉极化测量校准约束模型,给出了该约束下的最佳收发极化基。并针对实际的雷达天线进行了外场测量实验,实测处理结果验证了上述结论。利用约束模型可对实测的极化方向图实现有效的校准。 For an antenna under test to be evaluated, the cross-polarization characteristics are actually dependent on the polarizations, and the polarization cross-polarization performance evaluation results are different for polarization-based matching or mismatch. Firstly, the measurement model of antenna polarization was established, and the calibration constraint model of cross-polarization measurement was deduced. The best receiving and transmitting polarizations under this constraint were given. And the actual radar antenna for field measurement experiments, measured results verify the above conclusion. An effective calibration of the measured polarization pattern can be achieved using the constraint model.