存在互易性与对称性时二端口网络的参数特征

二端口网络的４个电压、电流之间的关系，可用６种不同参数描述，而每种参数又有４个元素。对于线性非时变的无源二端口网络，在零初始条件下，若存在互易性及对称性，则其电路参数具有一定的特殊性。本文将对这些特征进行详尽的分析和讨论，并由定义给出简化后的参数计算方法。

Parameter Characteristic of Two-poreNetworks Existing Reciprocity and Symmetry

The relationship of the four voltages and currents in two pore networks can be described using six different kinds of parameters,and every parameter has four elements respectively.If reciprocity and symmetry exist for passive two port networks of linear time invariant under zero intial condition,the circuit parameters will have some important characters.In this paper,these characters are analyzed and discussed particularly,then the simplified method of parameters calculation is presented.