摘要
为了提高接收机接收灵敏度及通信距离,设计了一种433 MHz频段两级低噪声放大器。使用了一种在集电极串联感性反馈,使放大管处于绝对稳定状态的方法,采用等噪声圆及等功率圆进行了低噪声放大器的仿真设计,分析了放大管的稳定性、噪声系数、增益等参数。仿真及测试结果表明低噪声放大器在433 MHz频段,噪声系数<0.6 dB,输入输出驻波比<1.5,增益>26 dB,将设计的低噪声放大器应用在433 MHz通信模块中,通信距离有显著提高。
A 2-stage and 433-band low noise amplifier is designed for improving the receiving sensitivity and communication distance of the receiver. A method that series the feedback inductive at the collector is used in this paper to ensure the amplifier tube in the stable state absolutely. Combined with the noise figure circles and the power gain circles,the design of the low noise amplifier is completed and the stability, noise figures and the transmitted power are analyzed. The simulation results show that the low noise amplifier achieves a power gain of 26 dB, the noise figures 〈 0.6 dB,input and output VSWR 〈 1.5. The communication distance is improved when the low noise amplifier is used in communication module.
出处
《电视技术》
北大核心
2014年第5期81-84,88,共5页
Video Engineering
基金
河北省高等学校科学技术研究项目(Z2012126
Z2011252)
