级联滤波模块驻波比的规律探讨  

Discussion on VSWR law of cascaded filtering module

作　　者：鲁统庭[1] 占腊民[1] 

机构地区：[1]华中科技大学光学与电子信息学院微波技术与应用研究所,湖北武汉430074

出　　处：《现代电子技术》2013年第7期72-75,79,共5页Modern Electronics Technique

基　　金：国家自然青年科学基金项目(61001012);华中科技大学自主创新基金2012

摘　　要：级联滤波器模块在短波通信中起到至关重要的作用,而驻波比是其重要的性能指标。以带通滤波器和低噪声放大器组成的级联滤波模块为例,分析了级联网络中影响驻波比的因素,重点研究了低噪声放大器的S参量与整体驻波比的关系。通过矩阵变换推导得出公式,进而从三个方面分析出定性的规律表达式,对实践工作有积极的指导意义。Cascade filtering module plays an important role in short-wave communication, and VSWR is a key performance index. Taking a cascade filtering module composed of band-pass filter and low noise amplifier （LNA） as an example, the main factor that impacts the VSWR in the cascade network is analyzed, and the relationship of S parameter and VSWR of low noise amplifieris studied. The formula is derived through the methods of matrix transformation. The qualitative regular expression was obtained by the analysis of three aspects.

关 键 词：驻波比 低噪声放大器 级联网络 S参量 

分 类 号：TN713.34[电子电信—电路与系统]