Optimised conversion efficiency of a HTS MMIC Josephson down-converter

J. Du; D. D. Bai; T. Zhang; Y. Jay Guo; Y. S. He; C. M. Pegrum

doi:10.1088/0953-2048/27/10/105002

Optimised conversion efficiency of a HTS MMIC Josephson down-converter

J. Du^*, D. D. Bai, T. Zhang, Y. Jay Guo, Y. S. He, C. M. Pegrum

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

A high-Tc superconducting (HTS) monolithic microwave integrated circuit (MMIC) Josephson down-converter that approaches zero conversion loss is reported. The all-HTS YBa2Cu3O7-x thin-film circuit consists of a step-edge Josephson junction mixer, a 10-12 GHz bandpass filter for the RF input, a lowpass filter for the IF output and a resonant strip line for local oscillator isolation; all are integrated on a single 10 mm × 20 mm MgO substrate. The DC characteristics of the junction and its mixing properties have been experimentally studied and compared to the results of (a) a single Josephson mixer without the on-chip HTS filters, and (b) our previously reported MMIC down-converter which had very different junction characteristics. The Josephson junction parameters are analysed to give insight into their effect on the mixer performance.

Original language	English
Article number	105002
Pages (from-to)	1-8
Number of pages	8
Journal	Superconductor Science and Technology
Volume	27
Issue number	10
DOIs	https://doi.org/10.1088/0953-2048/27/10/105002
Publication status	Published - 1 Oct 2014
Externally published	Yes

Keywords

conversion efficiency
high-temperature superconductor
Josephson junction mixer
monolithic microwave integrated circuit

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10.1088/0953-2048/27/10/105002

Cite this

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abstract = "A high-Tc superconducting (HTS) monolithic microwave integrated circuit (MMIC) Josephson down-converter that approaches zero conversion loss is reported. The all-HTS YBa2Cu3O7-x thin-film circuit consists of a step-edge Josephson junction mixer, a 10-12 GHz bandpass filter for the RF input, a lowpass filter for the IF output and a resonant strip line for local oscillator isolation; all are integrated on a single 10 mm × 20 mm MgO substrate. The DC characteristics of the junction and its mixing properties have been experimentally studied and compared to the results of (a) a single Josephson mixer without the on-chip HTS filters, and (b) our previously reported MMIC down-converter which had very different junction characteristics. The Josephson junction parameters are analysed to give insight into their effect on the mixer performance.",

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AU - Bai, D. D.

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AU - Jay Guo, Y.

AU - He, Y. S.

AU - Pegrum, C. M.

PY - 2014/10/1

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AB - A high-Tc superconducting (HTS) monolithic microwave integrated circuit (MMIC) Josephson down-converter that approaches zero conversion loss is reported. The all-HTS YBa2Cu3O7-x thin-film circuit consists of a step-edge Josephson junction mixer, a 10-12 GHz bandpass filter for the RF input, a lowpass filter for the IF output and a resonant strip line for local oscillator isolation; all are integrated on a single 10 mm × 20 mm MgO substrate. The DC characteristics of the junction and its mixing properties have been experimentally studied and compared to the results of (a) a single Josephson mixer without the on-chip HTS filters, and (b) our previously reported MMIC down-converter which had very different junction characteristics. The Josephson junction parameters are analysed to give insight into their effect on the mixer performance.

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Optimised conversion efficiency of a HTS MMIC Josephson down-converter

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Keywords

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