双线极化天线极化误差分析

天线的极化纯度是雷达或通信系统中非常重要的技术指标。在实际工程中，双线极化天线的非理想正交，导致天线具有较低的交叉极化水平，从而使得系统性能较差。针对该问题，对双线极化天线的极化误差进行分析，通过理论推导，给出空间合成电磁波的极化角与双线极化天线两正交通道的移相值、相位误差之间的量化关系。最后通过实验验证，证明了该极化误差分析的正确性。

Polarization error analysis of dual-line polarized antenna

Polarization purity of antenna is an essential technical indicator in radar or communication system.However, the poor cross-polarization level caused by non-ideal orthogonality of dual-line polarized antenna makes the imperfect performance of system. In response of this problem, the quantitative relationships among the polarization angle of electromagnetic waves synthesized in space, the phase value and the phase error of orthogonal channel are given by theoretical deduction. Finally, the experimental results verifies the correctness of the analysis.