Noise and conversion performance of a high- T c superconducting Josephson junction mixer at 0.6 THz

Xiang Gao; Jia Du; Ting Zhang; Yingjie Jay Guo

doi:10.1063/1.5004733

Noise and conversion performance of a high- T _c superconducting Josephson junction mixer at 0.6 THz

Xiang Gao, Jia Du, Ting Zhang, Yingjie Jay Guo

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

20 Citations (Scopus)

Abstract

This letter presents both theoretical and experimental investigations on the noise and conversion performance of a high-T_c superconducting (HTS) step-edge Josephson-junction mixer at the frequency of 0.6 THz and operating temperatures of 20-40 K. Based on the Y-factor and U-factor methods, a double-sideband noise temperature of around 1000 K and a conversion gain of -3.5 dB were experimentally obtained at 20 K. At the temperature of 40 K, the measured mixer noise and conversion efficiency are around 2100 K and -10 dB, respectively. The experimental data are in good agreement with the numerical analysis results using the three-port model. A detailed performance comparison with other reported HTS terahertz mixers has confirmed the superior performance of our presented mixer device.

Original language	English
Article number	192603
Journal	Applied Physics Letters
Volume	111
Issue number	19
DOIs	https://doi.org/10.1063/1.5004733
Publication status	Published - 6 Nov 2017
Externally published	Yes

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abstract = "This letter presents both theoretical and experimental investigations on the noise and conversion performance of a high-Tc superconducting (HTS) step-edge Josephson-junction mixer at the frequency of 0.6 THz and operating temperatures of 20-40 K. Based on the Y-factor and U-factor methods, a double-sideband noise temperature of around 1000 K and a conversion gain of -3.5 dB were experimentally obtained at 20 K. At the temperature of 40 K, the measured mixer noise and conversion efficiency are around 2100 K and -10 dB, respectively. The experimental data are in good agreement with the numerical analysis results using the three-port model. A detailed performance comparison with other reported HTS terahertz mixers has confirmed the superior performance of our presented mixer device.",

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AU - Du, Jia

AU - Zhang, Ting

AU - Guo, Yingjie Jay

PY - 2017/11/6

Y1 - 2017/11/6

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AB - This letter presents both theoretical and experimental investigations on the noise and conversion performance of a high-Tc superconducting (HTS) step-edge Josephson-junction mixer at the frequency of 0.6 THz and operating temperatures of 20-40 K. Based on the Y-factor and U-factor methods, a double-sideband noise temperature of around 1000 K and a conversion gain of -3.5 dB were experimentally obtained at 20 K. At the temperature of 40 K, the measured mixer noise and conversion efficiency are around 2100 K and -10 dB, respectively. The experimental data are in good agreement with the numerical analysis results using the three-port model. A detailed performance comparison with other reported HTS terahertz mixers has confirmed the superior performance of our presented mixer device.

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Noise and conversion performance of a high- T _c superconducting Josephson junction mixer at 0.6 THz

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