是在搞不懂了
仿真信息输出：
Simulation / Synthesis Messages
Warning detected by hpeesofsim during SP analysis `SP1'.
While evaluating `SNP2.X1.CMP1.All':
Extrapolation on independent variable `freq' was detected.
Warning detected by hpeesofsim during SP analysis `SP1'.
While evaluating `SNP2.X1.CMP1.Z[1]':
Extrapolation on independent variable `freq' was detected.
Warning detected by hpeesofsim during SP analysis `SP1'.
While evaluating `SNP3.X1.CMP1.All':
Extrapolation on independent variable `freq' was detected.
Warning detected by hpeesofsim during SP analysis `SP1'.
While evaluating `SNP3.X1.CMP1.Z[1]':
Extrapolation on independent variable `freq' was detected.
Status / Summary
已经超出S参数模型的频率范围了，在超出时软件会采用外插的方法绘出超出部分的曲线， 外插往往会不准。这就造成了你看到的现象。仿真信息中的警告也说明了这一点。
就是说模型里面只有特定频率范围的S参数了？
原来是这样，多谢多谢啦！
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