广义散射参数在阻抗匹配中的应用  

Application of General Scattering Parameters to Impedance Matching

作　　者：李刚[1] 胡旭[2] 

机构地区：[1]湖北文理学院物理与电子工程学院,湖北襄阳441053 [2]湖北文理学院经济与政法学院,湖北襄阳441053

出　　处：《湖北文理学院学报》2016年第2期15-18,共4页Journal of Hubei University of Arts and Science

基　　金：湖北省教育厅科学技术研究项目(Q20152605);湖北文理学院博士科研基金项目(2013B006)

摘　　要：在射频电路系统中,需要对负载阻抗进行阻抗匹配才能够保证资用功率最大化地传送给负载阻抗.传统的阻抗匹配理论对应的散射参数中参考阻抗是一个实数阻抗,只能够适应等阻抗匹配条件.实际射频电路系统中参考阻抗一般为复阻抗,传统的散射参数匹配理论已经无法适用.针对上述问题,文章引入共轭匹配条件下的广义散射参数概念,对比研究传统的散射参数与广义散射参数的物理含义,通过一个二端口网络匹配网络算例解释广义散射参数的应用.In the radio frequency circuit system, impedance matching is required to ensure that the available power is maximumly transmitted to the load impedance. The traditional impedance matching theory assumes that the source impedance is a real impedance and the load can get the available power under the condition of equal source impedance and load impedance. In the actual system, the source impedance is usually a complex impedance and the matching conditions is conjugate matching. The traditional scattering parameters describe the nature of the matching network, the physical meaning is not intuitive and the theoretical formula is complicated. For the above problems, the paper introduces the concept of general scattering parameters and compares the difference between the two scattering parameters. The application of general scattering parameters is explained through a two port network matching network and the results have practical engineering value.

关 键 词：散射参数 功率波 广义散射参数 阻抗匹配 电压波 

分 类 号：TN713.5[电子电信—电路与系统]