SPICE模型提取

讲得不清不楚，没有建议。

spice模型和原始模型分别仿真对比S参数来验证提取模型是否准确，在进行s参数对比时 对比结果里有passivated error 和aprox error ，通过他们来判断spice模型对原始模型的接近程度

请善用软件的帮助文件。
CST MWS帮助文件《Network Parameter Extraction Overview》：
Approx. Error of S: Shows the relative approximation error over the frequency.
Passivated Error of S: The error of the passivated S-parameters over the frequency.
PS: Furthermore, the passivity requirements are met which means that the equivalent SPICE circuit is stable and passive and therefore ideally suited for embedding in larger systems or circuit simulations.

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