Radio frequency SQUIDs operating at 77 K with 1 GHz lumped-element tank circuits
He, D. F. ; Zeng, X. H. ; Krause, H.-J. ; Soltner, H. ; Rüders, F. ; Zhang, Y.
Woodbury, NY : American Institute of Physics (AIP)
Published 1998
Woodbury, NY : American Institute of Physics (AIP)
Published 1998
| ISSN: |
1077-3118
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
We have developed a matching scheme for the operation of a rf superconducting quantum interference device (SQUID) with a lumped-element tank circuit at pumping frequencies up to 1 GHz. This conventional LC resonant circuit is inductively coupled to a matching coil, which is connected to the 50 Ω transmission line. We characterized the flux noise of high-temperature rf SQUIDs at resonant frequencies between 221 and 950 MHz. At about 900 MHz, we obtained the white flux noise of about 14.6 μφ0/Hz with a SQUID inductance LS=150 pH and 20 μφ0/Hz with LS=260 pH. Several of such tank circuits can be driven in parallel or in series with only one cable. © 1998 American Institute of Physics.
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| Type of Medium: |
Electronic Resource
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| URL: |