Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Cross Strait Radio Science and Wireless Technology Conference (CSRSWTC)

Testing and analysis of bicrystal Josephson junction mixer's conversion efficiency at THz

Tao Hua, Weiwei Xu, Dachun Li, Jian Chen, Peiheng Wu

Published Jul 1, 2011• 0 citations
Publisher

Abstract

This paper is a research on the conversion efficiency of high-temperature superconductivity bicrystal Josephson junction mixer at THz. Using ion etching, junction integrated with antenna is prepared. Experiment on microwave exposure less than 650GHz has been obtained using miniature pulse tube refrigerator system. Conversion efficiency depended on local oscillation power, microwave signal power, harmonic order, bias electric current, etc., has been tested and analyzed.

DOI
10.1109/csqrwc.2011.6037040

Related papers

Test and analysis of bicrystal Josephson junction mixer’s conversion efficiency

MengYue LI, Jian Chen, Tao Hua +4 more

The research work on the conversion efficiency of high-temperature superconductivity bicrystal Josephson junction mixer is reported. Using ion etching, the junction integrated with antenna is prepared. Experiment on harmonic mixing at 3 mm waveband is carried out. The relationship between conversion efficiency and the parameters of local oscillation power, microwave signal power, harmonic order, bias electric current, etc., is tested and analyzed.

Chinese Science Bulletin (Chinese Version)•Jul 1, 2009•0 citations

RESEARCH ON CONVERSION EFFICIENCY CHARACTERISTIC OF HTS JOSEPHSON JUNCTION HARMONIC MIXERS

Wu Pei-Heng

Mixers with HTS YBCO/MgO,YBCO/YSZ bicrystal Josephson junction are researched on.Harmonic mixing at sub-mm wave band has been studied on two different HTS mixing systems:one is mounted on pulse tube cryocooler,the other is G-M cryocooler.We measured and analyzed the characteristic of Conversion Efficiency and its relationships with coupling coefficient,LO power,bias current,harmonic number and so on.

Diwen wuli xuebao•Jan 1, 2008•0 citations

Terahertz harmonic mixer based on HTS Josephson junction

Mei Yu, Weiwei Xu, Jin Shi +3 more

High temperature superconducting (HTS) Josephson junction (JJ) mixers are attractive candidates in receivers for terahertz (THz) communication due to their high sensitivity, wide bandwidth, low local oscillator (LO) power requirement and high harmonic numbers. The required LO frequencies and the cost can be greatly reduced when harmonic signals can be detected at high orders (more than 100). In this paper, up to 114thharmonic mixings is presented in a HTS bicrystal YBa2Cu3O7-δ(YBCO) JJ harmonic mixer coupled with a bowtie loaded meander antenna at 0.21 THz. HTS JJs will be promising high-order harmonic mixers for THz practical applications on reception or detection at THz bands.

International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)•Aug 29, 2021•0 citations

A wideband terahertz high- T c superconducting Josephson-junction mixer: electromagnetic design, analysis and characterization

Xiang Gao, Ting Zhang, Jia Du +3 more

Abstract This paper presents a wideband terahertz (THz) mixer based on a thin-film antenna-coupled high-temperature superconducting (HTS) YBa 2 Cu 3 O 7−x (YBCO) step-edge Josephson junction. The HTS mixer enables the flexible harmonic mixing operation at multiple THz bands with the same microwave local oscillator (LO) source, and features very wide intermediate-frequency or instantaneous bandwidth. In order to optimize the frequency down-conversion performance of the mixer, systematic electromagnetic design and analysis have been carried out to improve the power coupling of THz radiation as well as wideband transmission of microwave signals. Experimental characterization of a fabricated device prototype has demonstrated that the mixer exhibits good performance at both the 200 GHz and 600 GHz bands. Detailed measurement results including the DC characteristics, LO pumping requirement, frequency response, mixing linearity and conversion gain are presented in this paper.

Superconductor Science and Technology•Jun 30, 2017•42 citations

High-Tc superconducting Josephson mixers for terahertz heterodyne detection

M. Malnou, C. Feuillet-Palma, C. Ulysse +6 more

We report on an experimental and theoretical study of the high-frequency mixing properties of ion-irradiated YBa2Cu3O7 Josephson junctions embedded in THz antennas. We investigated the influence of the local oscillator power and frequency on the device performances. The experimental data are compared with theoretical predictions of the general three-port model for mixers in which the junction is described by the resistively shunted junction model. A good agreement is obtained for the conversion efficiency in different frequency ranges, spanning above and below the characteristic frequencies fc of the junctions.

Journal of Applied Physics•Aug 19, 2014•63 citations

Noise figure measurement of high temperature superconducting bi-crystal josephson junction THz mixers

Deyue An, Weiwei Xu, Tao Hua +4 more

Using the Y-factor measurement method, we estimated the noise figure (NF) of the high temperature superconducting bi-crystal Josephson junction mixer. The experiment was based on small pulse tube refrigerator, working at 60 K. We tested and analysed the dependence of bias voltage and local oscillation signal power with the noise figure.

International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)•Sep 1, 2012•1 citation
This paper is a research on the conversion efficiency of high-temperature superconductivity bicrystal Josephson junction mixer at THz. Using ion etching, junction integrated with antenna is prepared. Experiment on microwave exposure less than 650GHz has been obtained using miniature pulse tube refrigerator system. Conversion efficiency depended on local oscillation power, microwave signal power, harmonic order, bias electric current, etc., has been tested and analyzed.
High temperature superconducting (HTS) Josephson junction (JJ) mixers are attractive candidates in receivers for terahertz (THz) communication due to their high sensitivity, wide bandwidth, low local oscillator (LO) power requirement and high harmonic numbers. The required LO frequencies and the cost can be greatly reduced when harmonic signals can be detected at high orders (more than 100). In this paper, up to 114thharmonic mixings is presented in a HTS bicrystal YBa2Cu3O7-δ(YBCO) JJ harmonic mixer coupled with a bowtie loaded meander antenna at 0.21 THz. HTS JJs will be promising high-order harmonic mixers for THz practical applications on reception or detection at THz bands.
Abstract This paper presents a wideband terahertz (THz) mixer based on a thin-film antenna-coupled high-temperature superconducting (HTS) YBa 2 Cu 3 O 7−x (YBCO) step-edge Josephson junction. The HTS mixer enables the flexible harmonic mixing operation at multiple THz bands with the same microwave local oscillator (LO) source, and features very wide intermediate-frequency or instantaneous bandwidth. In order to optimize the frequency down-conversion performance of the mixer, systematic electromagnetic design and analysis have been carried out to improve the power coupling of THz radiation as well as wideband transmission of microwave signals. Experimental characterization of a fabricated device prototype has demonstrated that the mixer exhibits good performance at both the 200 GHz and 600 GHz bands. Detailed measurement results including the DC characteristics, LO pumping requirement, frequency response, mixing linearity and conversion gain are presented in this paper.
We report on an experimental and theoretical study of the high-frequency mixing properties of ion-irradiated YBa2Cu3O7 Josephson junctions embedded in THz antennas. We investigated the influence of the local oscillator power and frequency on the device performances. The experimental data are compared with theoretical predictions of the general three-port model for mixers in which the junction is described by the resistively shunted junction model. A good agreement is obtained for the conversion efficiency in different frequency ranges, spanning above and below the characteristic frequencies fc of the junctions.