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一款用于超宽带接收系统的3GHz-5GHz低噪声放大器

DOI: 10.13190/j.jbupt.2015.02.020, PP. 108-112

Keywords: 共源级联,输入匹配,低噪声放大器,噪声系数

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Abstract:

设计了一种基于共源结构的两级级联超宽带低噪声放大器.该低噪声放大器采用了源端电感和四分之一阻抗变换器,在不恶化电路噪声系数的情况下具有较好的输入匹配.通过使用GaAs赝调制掺杂异质结场效应晶体管(pHEMT)器件,在PCB板上实现了低噪声放大器的加工,加工测试结果与原理图仿真结果基本符合.测试结果表明,该低噪声放大器的增益达到12±1.5dB,最小噪声系数为1.8dB,输入输出匹配结果良好.

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