Microstrip superconducting quantum interference device radio-frequency amplifier:: Tuning and cascading

被引：0
|
作者：
Mück, M [1 ]
André, MO
Clarke, J
Gail, J
Heiden, C
机构：
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] Univ Giessen, Inst Angew Phys, D-35392 Giessen, Germany
来源：
APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 22期
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暂无
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The resonant frequency of an amplifier based on a low-temperature dc superconducting quantum interference device (SQUID) is tuned by varying the capacitance across the end of the input microstrip by means of a varactor diode. The resonant frequency can be reduced substantially, for example, from 190 to 110 MHz, while maintaining an on-resonance gain of 27-28 dB. Two microstrip SQUID amplifiers with the same resonant frequency are cascaded to achieve a gain of 33.5 +/- 1 dB at 386 MHz; with the SQUIDs tuned to different frequencies, the gain is 22 dB or higher from about 260 to 420 MHz. (C) 1999 American Institute of Physics. [S0003-6951(99)02648-0].
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页码：3545 / 3547
页数：3
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