3G基站射频前端LNA阻抗匹配优化设计  

Impedance Matching Optimal Design of 3G Base RF LNA

作　　者：宋燕辉[1,2] 李丽[2] 苏钢[1] 余文奇[3] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074 [2]长沙通信职业技术学院移动通信系,湖南长沙410015 [3]河南工程学院计算机科学与工程系,河南郑州451191

出　　处：《微电子学与计算机》2012年第12期180-183,188,共5页Microelectronics & Computer

基　　金：国家科技重大专项项目(2010ZX03005-001-03;2012ZX03001-036-002);湖南省教育厅科技项目(11C0100)

摘　　要：针对1.9GHz的3G基站射频前端LNA电路中的阻抗匹配问题,把厂家提供的小信号S参数制成S2P文件,然后将其导入EDA软件中搭建LNA电路的输入、输出端口匹配电路,并结合噪声系数和最大增益进行了阻抗匹配优化设计,并对优化后的LNA电路进行了仿真分析.仿真结果表明:在LNA电路的增益得到提高的同时,反射系数得到了显著的改善,达到了阻抗匹配优化设计的目的.该设计方法是解决3G基站射频前端LNA阻抗匹配问题的有效途径之一.Aiming at the impedance matching problem of 3G base RF LNA circuit, an impedance matching optical design based on EDA software has been given in this paper. Firstly, the small signal S parameters of the LNA are utilized to make the file of S2P, which provided by manufacturers modeling. Secondly, the model of input and output matched circuits in Ansoft designer is built to optimize the input and the output circuits according to the maxinization gain and noise. The simulation results show that the Gain of optimized LNA is improved, at the same time reflectance have been improved significantly. This method is one of the efficient ways to solve the impendence matching problem of 3G Base RF LNA.

关 键 词：3G基站 LNA 阻抗匹配 S参数 噪声系数 最大增益 

分 类 号：TN722[电子电信—电路与系统]