摘要
首先分析了低噪声放大电路的稳定性,功率增益及噪声系数的影响因素及改进方法;然后设计了一个中心频率为2.45 GHz,工作带宽为100 MHz的S波段低噪声放大器。仿真结果表明,该放大器的噪声系数小于1 dB,功率增益大于28 dB,增益平坦度小于1 dB,输入/输出驻波比小于2∶1。通过传统的电路板制作工艺实际制作了放大器电路,测试结果和仿真结果较一致。
The stability,power gain,noise figure of low noise amplifier,as well as the influent factors and improved methods are analyzed in this paper.An S-band low noise amplifier with 2.45 GHz central frequency,100 MHz operation bandwidth is designed.The simulation results show that the noise figure1 dB,the power gain28 dB,the flatness of gain1 dB and the input/output VSWR 2∶1.An experimental LNA circuit is realized through traditional PCB process,the measured results are in good agreements with the simulation ones.
出处
《压电与声光》
CSCD
北大核心
2011年第3期505-508,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(51078369)
