本文利用多口网络参数矩阵，讨论了多口网络参数矩阵转换的系统方法。
In this pape, a new transform method of parameter matrix of multi input and out put network is found.
在对多端口网络参数的等效变换中，得到了几个有趣的分块矩阵求逆公式。
Four interesting formulas for the block matrix inversion are derived from equivalent transformations of multi-port network parameters in this paper.
理论结果不仅能计算谐振频率，而且还给出散射矩阵等网络参数。
As a result, the network parameters and the resonant frequency are obtained.
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