S波段低噪声放大器的设计

摘要

为了加快低噪声放大器的设计过程,采用全微带匹配技术,使用ADS软件设计了一款应用于2.2～2.3GHz频段的低噪声放大器.该放大器选用Agilent公司的高电子迁移率晶体管ATF-34143,根据噪声系数和高增益的要求进行两级放大器电路的设计,为提高设计效率,将偏置电路与稳定性设计相结合.仿真结果表明,在设计频段内,增益大于23dB,噪声系数小于0.6dB,输入输出驻波比小于1.2.%In order to speed up the design process of the low noise amplifier.Basing on the microstrip impedance matching technique, a low noise amplifier used in 2.2～2.3 GHz is designed by using ADS software.HEMT ATF-34143 of Agilent Company was used in this amplifier system.A two-stage topology was used to reach the requirement of the noise coefficient and high gain.In order to improve efficiency of the design, combing the bias circuit design with stability design is proposed.The simulated results show that the gain of the amplifier is more than 23 dB, the noise figure is less than 0.6 dB, input and output VSWR of the amplifier is less than 1.2.