通道不平衡和天线串扰对瞬态极化测量的影响

雷达目标的极化散射矩阵包含了目标的结构、材料和形状等特征信息，在目标识别、分类以及抗干扰等领域 可发挥重要作用。准确获取目标的极化回波信息是进一步利用极化特征进行目标识别分类的前提。本文依据瞬时极化 测量体制，针对实际的双通道瞬时极化雷达系统，推导了包含通道不平衡和天线串扰等系统误差的数学模型。通过仿 真分析，获得了通道不平衡和天线串扰对提取目标极化散射矩阵的影响，为瞬时极化雷达系统设计和系统校准工作提 供依据。

Impact of Channel Imbalance and Antenna Crosstalk on the Instantaneous Polarization Measurement

Polarization scattering matrix (PSM) of radar target contains target characteristic such as structure, materials and shape, which can play an important role in target identification, classification and anti-jamming. It is a basic premise that to acquiring the polarization scattering matrix of radar target accurately before target identification and classification by utilizing polarization information. According to instantaneous polarization measurement (IPM) method, this paper analyses an actual dual-channel IPM radar system, and derives its mathematical model including channel imbalance and antenna crosstalk. According to the simulation results, the impact of channel imbalance and antenna crosstalk on the acquiring of PSM of target can be obtained. This work provides valuable conclusions for radar system design and calibration.