A method of obtaining [S] matrix from a microstrip triangular network circuit

With the help of [A] and [Y] matrices, we can quickly obtain the [S] matrix of a T or π type network and its serial or parallel circuit. For a complex circuit configuration, for example, it is a hybrid triangle network circuit that contains lumped components and distributed components, when analyzing the equivalent circuit of n-way n-section Wilkinson power divider. Rare reference presents idea for how to obtain the [S] matrix. This paper will introduce a method of obtaining [S] matrix from triangle network circuits. It is explicit and pragmatic. Furthermore, no matter how complex the circuit is, we can always obtain the correct [S] matrix based on the method.