圆图是长线理论的图解法 ，圆图的构成是基于把描述传输线工作状态的归一化输入阻抗和反射系数两个参量图解在一张复平面上-Chart of the diagram are the theoretical long-term law, constitute a circular map is based on the transmission line descr iption of the job status of the normalized input impedance and reflect