基于史密斯圆图分析射频放大器的设计

基于史密斯圆图分析射频放大器的设计 Analysis Radio Frequency Amplifier Design Based on Smith Chart 罗建国 LUO Jian-guo~1 1 2 3 first-author 游治 YOU Zhi~2 1 2 3 江西财经大学电子学院 江西财经大学电子学院 Jiangxi Finance and Economics University Electron Institute Jiangxi Finance and Economics University Electron Institute 武汉大学电子信息学院,江西,南昌,330013 武汉大学电子信息学院,江西,南昌,330013 College of Electronic Information, Wuhan University College of Electronic Information, Wuhan University ,湖北,武汉,430072 ,湖北,武汉,430072 分析了史密斯圆图与射频放大器的基本理论,研究了将史密斯圆图应用于射频放大器电路的设计.着重对提高电路稳定度和线性度、降低噪声系数和改善输入输出特性进行了分析研究.通过实例分析可得该放大器的增益为20 dB,噪声系数最小为2 dB,电压驻波比为1.7∶1.仿真结果表明该放大器的设计方法具有良好的可行性和实用性. The basic theories of Smith’s chart and the radio frequency amplifier is analysed, studied the design of the radio frequency amplifier circuit of applying Smith’s chart. Emphatically Improving circuit steady degree and linear degree、 reducing noise coefficient and improving characteristic of input and output is analysed and researched. The example analysis of amplifier: the gain is 20 dB, the noise is 2 dB, the VSWR is 1.7∶1. Emulation indicates that the amplifier design method has good feasibility and practicability. 电路分析 史密斯圆图 S参数 射频放大器 circuit analysis smith chart S parameter radio frequency amplifier TN722 国家自然科学基金资助项目（50099620）;国家863计划资助项目（2001AA132050 03） 2005-01-01 2021-04-01 1