Radio-frequency amplifiers based on dc SQUIDs

被引：40

作者：

Mueck, Michael ^{[1
]}

McDermott, Robert ^{[2
]}

机构：

[1] Univ Giessen, Inst Angew Phys, D-35392 Giessen, Germany

[2] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2010年 / 23卷 / 09期

关键词：

QUANTUM INTERFERENCE DEVICE; RF AMPLIFIER; PARAMETRIC AMPLIFICATION; NOISE; OPTIMIZATION; SEARCHES; SIGNAL;

D O I：

10.1088/0953-2048/23/9/093001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

SQUIDs are an attractive candidate for the amplification of low-level rf and microwave signals. Compared to semiconductor amplifiers, they offer lower noise and much lower power dissipation. Especially at frequencies below 1 GHz, the improvement in noise temperature compared to the best cold semiconductor amplifiers can be as high as 50; noise temperatures only slightly above the quantum limit have been achieved in this frequency range. This article will review the current status of radio-frequency amplifiers based on dc SQUIDs and provide detailed discussions of amplifier noise temperature, input and output impedance, and nonlinearities.

引用

页数：11

共 50 条

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