一种S波段低噪声放大器的设计  

Design of a S-Band Low Noise Amplifier

作　　者：程骏[1] 李海华[2] 

机构地区：[1]广东技术师范学院电子信息学院,广州510665 [2]华南农业大学图书馆,广州510640

出　　处：《电子器件》2013年第2期206-210,共5页Chinese Journal of Electron Devices

摘　　要：基于Siemens的NPN射频晶体管BFP420,设计出一款适合于S波段的低噪声放大器,本设计使用了宽带匹配技术,结合微带线和集总元件设计出宽带的匹配网络。放大器适用频率范围:1.8 GHz～3.2 GHz,可用带宽1.4 GHz,相对带宽56%,属超宽带低噪声放大器。测试结果表明,在可用频段范围内,放大器增益波动3.7 dB,输入驻波比VSWR<1.8 dB,输出驻波比VSWR<1.295 dB;1.8 GHz增益G=12.53 dB、噪声系数NF=1.128 dB;3.2 GHz增益G=8.79 dB、噪声系数NF=1.414dB。本设计可满足无线蓝牙、WIFI,Zigbee等多种2.4 GHz主流ISM无线设备的应用要求。A low-noise amplifier for the S-band frequency is described by using the Siemens RF transistor BF420.In order to get a wider bandwidth,a broadband matching network is presented,which is composed by both microstrip lines and lumped elements.For this LNA,the operating frequency range is 1.4 GHz-3.2 GHz,with a 56% relative bandwidth,which is an ultra wide passband.The test results show that,in the available frequency range,the value of the amplifier gain fluctuations is 3.7 dB,input VSWR1.8 dB,output VSWR1.295 dB;1.8 GHz gain G=12.53 dB,noise figure NF=1.128 dB;3.2 GHz gain G=8.79 dB,noise figure NF=1.414 dB.This LNA can be widely used in many 2.4 GHz ISM devices and products,such as Bluetooth,WIFI,Zigbee,and so on.

关 键 词：放大器 低噪声 宽带匹配 BFP420 S波段 

分 类 号：TN722.3[电子电信—电路与系统]