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Search: WFRF:(Acharya Narendra 1982) > (2019)

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  • Acharya, Narendra, 1982, et al. (author)
  • Analysis of the broad IF-band performance of MgB2 HEB mixers
  • 2019
  • In: IEEE Transactions on Terahertz Science and Technology. - 2156-342X .- 2156-3446. ; 9:6, s. 565-571
  • Journal article (peer-reviewed)abstract
    • We present an experimental study of gain and noise bandwidths in superconducting MgB2 hot-electron bolometer (HEB) terahertz mixers in a 0.1-20 GHz intermediate frequency (IF) range. At an elevated temperature and with a 90-GHz local oscillator (LO), we measure a gain bandwidth of 13-14 GHz, which is the first accurate data for ultrathin MgB2 films. The output noise spectrum has its maximum in the 100-200 K range, depending on the temperature (or the LO power) and the bias point, and its spectrum also confirms the gain bandwidth data obtained with the mixing experiment. Using both the gain and the output noise spectra, we obtain the mixer input noise temperature, which is nearly constant up to 20 GHz. Using the measured data and the HEB mixer theory, we argue that noise bandwidth in the current MgB2 HEB mixers is ∼30 GHz.
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  • Result 1-3 of 3
Type of publication
conference paper (2)
journal article (1)
Type of content
peer-reviewed (3)
Author/Editor
Cherednichenko, Serg ... (3)
Acharya, Narendra, 1 ... (3)
Novoselov, Evgenii, ... (1)
Lara Avila, Samuel, ... (1)
University
Chalmers University of Technology (3)
Language
English (3)
Research subject (UKÄ/SCB)
Natural sciences (3)
Engineering and Technology (3)
Year
2019 (3)Undo refine

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