Microwave impedance matching refers to the condition that , the reflection at the system terminal or at the joints which are connected by transmission line with different characteristic impedance , is zero all the time in the process of microwave signal transmitting . the matching mentioned relates to the system transmission efficiency , power capacity and stability , and it also relates to the fixed error and measuring accuracy in the process of microwave measurement 微波阻抗匹配是指微波信号传输过程中,在系统的终端或不同特性阻抗传输线的连接处不产生反射;它关系到系统的传输效率、功率容量与工作稳定性,关系到微波测量的系统误差和测量精度,以及微波元器件的质量等一系列问题。