A cryogenically-cooled wide-band HEMT MMIC low-noise amplifier
A cryogenically-cooled wide-band HEMT MMIC low-noise amplifier
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低温冷却宽带 HEMT MMIC 低噪声放大器
DOI：
10.1109/75.122409
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
B. Allen
中科院分区：
文献类型：
--
作者：
C. C. Yang;B. Nelson;W. Jones;B. Allen
设计、制作了一种平衡单级宽带HEMT MMIC低噪声放大器（LNA），并在8-18 GHz范围内进行了测试。MMIC LNA在所有测试温度下均无损坏。放大器增益平坦度在8-18-GHz频带内保持在室温和低温下，表明宽带设计拓扑结构对工作温度相对不敏感。增益平均增加了2 dB，而噪声温度表现出多达8倍的减少，从160 K到20 K在19 K的工作温度。这是第一个低温冷却HEMT MMIC LNA性能的结果。>
A balanced single-stage wideband HEMT MMIC low-noise amplifier (LNA) was designed, fabricated, cooled to a temperature of 19 K, and evaluated from 8-18 GHz. The MMIC LNA performed without damage at all test temperatures. The amplifier gain flatness over the 8-18-GHz frequency band was maintained at both room and cryogenic temperature, indicating that the broadband design topology is relatively insensitive to operation temperature. Gain increased an average of 2 dB, while the noise temperature exhibited as much as an eightfold reduction from 160 K to 20 K at 19 K operation temperature. This is the first result on performance of a cryogenically cooled HEMT MMIC LNA. >