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PUBLICATIONS

Microwave SQUID multiplexer

Published

Author(s)

Kent D. Irwin, Konrad Lehnert

Abstract

We describe a superconducting quantum interference device (SQUID) multiplexer operated at microwave frequencies. The outputs of multiple SQUIDs are simultaneously modulated at different frequencies, frequency-division multiplexed, and amplified using a high electron mobility transistor (HEMT). The large bandwidth and dynamic range provided by HEMT amplifiers should make it possible to multiplex a large number of SQUIDs in one output coaxial cable. We measure good SQUID noise performance and demonstrate the multiplexed readout of two dc SQUIDs at different resonant frequencies. In this work dc SQUIDs are used, but this approach is equally applicable to rf SQUIDs.
Citation
Applied Physics Letters
Volume
85
Issue
11
Pub Type
Journals

Keywords

HEMT, multiplexer, SQUID

Citation

Irwin, K. and Lehnert, K. (2004), Microwave SQUID multiplexer, Applied Physics Letters (Accessed October 8, 2025)

Issues

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Created September 12, 2004, Updated October 12, 2021
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