为了便于时域卷积，对不同模量上的特征阻抗和延时函数在复频域采用矢量匹配法进行拟合。
For the convenience of time -domain convolution, the vector fitting method is adopted to approach the characteristic impedance and delay function in complex frequency-domain.
由于噪声存在下矢量匹配法的收敛情况并不理想，需要对基本的矢量匹配法进行适当的改进。
The fitting result of Vector Fitting is not ideal when noise exists, and there is a need to improve Vector Fitting.
基于矢量匹配法的传输线宏模型与PCB的传输线等效电路模型均可以应用于传输线emc分析中。
The macro model of transmission line based on Vector Fitting and the equivalent circuit model of the transmission line in PCB can be used in EMC analysis.
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