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Wideband MgB2 Hot-Electron Bolometer Mixers: IF Impedance Characterisation and Modeling

Stella Bevilacqua (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Evgenii Novoselov (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Sergey Cherednichenko (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Hiroyuki Shibata ; Yasuhiro Tokura
IEEE transactions on applied superconductivity (1051-8223). Vol. 26 (2016), 3, p. 99.
[Artikel, refereegranskad vetenskaplig]

In this paper we present a method for low signal S11 parameter vector measurements of a cryogenic device in the microwave frequency range. In particular, the intermediate frequency (IF) impedance of MgB2 Hot-electron Bolometer (HEB) mixers was investigated over a frequency range of 100 MHz to 10 GHz. A new cryogenic calibration technique, which employs the HEB as a calibration kitandrequires two consecutive thermal cycles, was developed for this purpose.The real part of measured IF impedance showed a strong correlationwith the differential resistance (dV/dI) obtained from the dc I-V curves while the imaginary partwas capacitive for almost the entire frequency range.

Nyckelord: Heterodyne receiver, Hot-electron bolometers (HEBs),IF impedance, MgB2 thin film , THz detectors.



Denna post skapades 2016-03-24. Senast ändrad 2016-06-17.
CPL Pubid: 233702

 

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