摘要
本文给出一种频带覆盖达１０－１６００ＭＨｚ的微波ＢＪＴ超宽带低噪声放大器的设计方法。从微波ＢＪＴ的噪声模型出发，通过拟合５０Ω源阻抗下微波ＢＪＴ的噪声系数ＮＦ５０和Ｓ参数来提取其噪声参数，然后根据增益、噪声及驻波比要求优化设计放大器，使放大器在超宽带范围内获得平坦增益和低噪声。本文所给出的微波ＢＪＴ噪声参数提取及放大器优化设计方法已由实验结果所验证。
A design method of microwave BJT ultra-wideband low-noise amplifier with bandwidth of 10-1600MHz is given in this paper. Based on microwave BJT noise model,the BJT noise parameters are extracted through fitting its noise figure NF50 and S-parameters under 50Ω source impedance,and according to the need of gain, noise and VSWR,the amplifier is designed with flat-gain and low-noise within the ultrawide bandwidth. This method has been verified by the experiment results.
出处
《通信学报》
EI
CSCD
北大核心
1994年第4期48-52,共5页
Journal on Communications
关键词
宽带放大器
低噪声放大器
BJT
low noise, wideband amplifier, circuit simulation
