Commercial GaAs pHEMT transistors, Agilent ATF-35143, were used in this 2-stage amplifier. At a physical temperature 15K the amplifier achieves noise temperature between 3.2K and 3.8K over 1600MHz to 1740MHz band.

• 该放大器采用了Agilent 公司ATF-35143 假晶高电子迁移率场效应管(pHEMT),为两级级联结构,频率范围1600MHz~1740MHz。