论文部分内容阅读
极化合成可以利用已获得的极化散射矩阵重新生成任意极化方式下的雷达接收功率图像,并能通过选取收发天线极化状态相同或正交,分别得到描述目标散射特性的共极化特征图和交叉极化特征图。基于极化合成理论和极化特征图的概念,可以分析定标精度对目标极化散射特性的影响。根据栅格三面角反射器的理论计算和实际测量的极化散射矩阵,通过极化特征图对其进行定标精度的应用需求分析。实验结果表明,当幅度定标精度在1dB,相位定标精度在10°范围内时,极化数据所反映的目标散射特性是准确真实的,即在此定标精度范围内可以满足后续的极化特征提取、目标参数反演等应用需求。
Polarization synthesis can use the obtained polarization scattering matrix to regenerate the radar receiving power image under any polarization mode and obtain the same polarization characteristics as the polarization state of the receiving and transmitting antennas respectively to obtain the co-polarization characteristics describing the target scattering characteristics Figure and Cross Polarization Feature Diagram. Based on the concept of polarization synthesis theory and polarization feature map, the influence of calibration accuracy on the polarization characteristics of the target can be analyzed. According to the theoretical calculation of the grating trigonometric reflector and the polarization scattering matrix actually measured, the application needs analysis of the polarization characteristic map is carried out. The experimental results show that when the amplitude calibration accuracy is 1dB and the phase calibration accuracy is within 10 °, the target scattering characteristics reflected by the polarization data are accurate and real, that is, within this calibration accuracy, the following poles can be satisfied Feature extraction, target parameter inversion and other application requirements.