Advertisement

Journal of Low Temperature Physics

, Volume 193, Issue 3–4, pp 402–407 | Cite as

Accurate Measurement of Gain Saturation of Superconductor–Insulator–Superconductor Mixers with Logarithmic Power Detectors

  • Wenlei Shan
Article

Abstract

Correct measurement of the power of a continuous wave signal superimposed on a broadband noise is a presupposition for the accuracy of the gain saturation measurement of a superconductor–insulator–superconductor mixer. In practice, the response of a logarithmic power detector to a mixture of broadband noise and continuous wave signal can be unexpectedly nonlinear. This nonlinearity can cause significant error if correction is not applied.

Keywords

Gain saturation Superconductor–insulator–superconductor Logarithmic power detector 

Notes

Funding

Funding was provided by National Natural Science Foundation of China (Grant No. U1331203).

References

  1. 1.
    G. Engargiola, R.L. Plambeck, Proc. SPIE 3357, 508–518 (1998).  https://doi.org/10.1117/12.317384 ADSCrossRefGoogle Scholar
  2. 2.
    A.R. Kerr, Proc. ISSTT 2002, 11–22 (2002)Google Scholar
  3. 3.
    C.E. Tong, A. Hedden, R. Blundell, IEEE. Trans. Appl. Supercond. 19, 309–312 (2009).  https://doi.org/10.1109/TASC.2009.2019102 ADSCrossRefGoogle Scholar
  4. 4.
    R.L. Plambeck, ALMA Memo 321 (2000). http://www.alma.nrao.edu/memos/
  5. 5.
    A.R. Kerr, Proc. ISSTT 2003, 257–264 (2003)Google Scholar
  6. 6.
    A. Estin, W. Daywitt, IEEE. Trans. Inf. Theory 27, 663–664 (1981).  https://doi.org/10.1109/TIT.1981.1056388 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.National Astronomical Observatory of JapanMitakaJapan
  2. 2.Purple Mountain ObservatoryNanjingChina

Personalised recommendations