Experimental investigation of a broadband high-temperature superconducting terahertz mixer operating at temperatures between 40 and 77 K

Xiang Gao*, Jia Du, Ting Zhang, Y. Jay Guo, Cathy P. Foley

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper presents a systematic investigation of a broadband thin-film antenna-coupled high-temperature superconducting (HTS) terahertz (THz) harmonic mixer at relatively high operating temperature from 40 to 77 K. The mixer device chip was fabricated using the CSIRO established step-edge YBa2Cu3O7-x (YBCO) Josephson junction technology, packaged in a well-designed module and cooled in a temperature adjustable cryocooler. Detailed experimental characterizations were carried out for the broadband HTS mixer at both the 200 and 600 GHz bands in harmonic mixing mode. The DC current-voltage characteristics (IVCs), bias current condition, local oscillator (LO) power requirement, frequency response, as well as conversion efficiency under different bath temperatures were thoroughly investigated for demonstrating the frequency down-conversion performance.

Original languageEnglish
Pages (from-to)1357–1367
Number of pages11
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Volume38
Issue number11
Early online date2017
DOIs
Publication statusPublished - Nov 2017
Externally publishedYes

Keywords

  • Terahertz
  • Harmonic mixer
  • High-temperature superconducting Josephson junction
  • Broadband mixer

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