Telegraph equations, can be looked as cascade connection of two-portnetwork of lumped circuit of transmission line, is a hyperbolic partial differential equations.
传输线可以看作集中参数二端口网络的级联,其数学模型—电报方程是一阶双曲型偏微分方程组。
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On this basis, a frequency response equation of the TLT was deduced from a two-portnetwork model of the transmission line.
Traditional loop gain simulation method is based on two-portnetwork models, which is complex to analysis and it is not suitable to get quantitative analysis of the loop gain fast.