Self-pumped HTS Josephson heterodyne tunable mixer

J. Du*, J. C. MacFarlane, T. Zhang, Y. Cai, Y. J. Guo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Experimental evaluation of a high-temperature superconducting Josephson heterodyne mixer based on a resistive-SQUID configuration is reported. The device consists of two YBa 2Cu 3O 7-x step-edge Josephson junctions connected via a small resistor in an otherwise superconducting loop. It has been previously shown to generate a heterodyne oscillation, which is frequency-tunable by a control current through the resistor. Under certain conditions, this device can operate as a frequency-tunable heterodyne mixer (down-converter) in the presence of an RF signal. In this paper, we describe the operation of the autonomous Josephson mixerlocal oscillator device and present the experimental results on the mixer performances in terms of the junction currentvoltage characteristics, the frequency tunability, linearity, and dynamic range as well as their temperature dependence for signal frequencies from 1 to 5GHz.

Original languageEnglish
Article number025019
Pages (from-to)1-6
Number of pages6
JournalSuperconductor Science and Technology
Volume25
Issue number2
DOIs
Publication statusPublished - Feb 2012
Externally publishedYes

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