Nb–Te–Nb Josephson mm-Wave Mixer Characteristics and Analysis

An mm-wave mixing integrated circuit with a Josephson junction has been fabricated. An Nb–Te–Nb sandwich-type Josephson junction with no hysteresis on its I - V curve was used as the active element. Both RF and IF circuits were constructed in the form of superconducting microstriplines using an Si w...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 21; no. 6R; p. 848
Main Authors Takayanagi, Hideaki, Nagata, Koichi, Uehara, Shingo
Format Journal Article
LanguageEnglish
Published 01.01.1982
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Summary:An mm-wave mixing integrated circuit with a Josephson junction has been fabricated. An Nb–Te–Nb sandwich-type Josephson junction with no hysteresis on its I - V curve was used as the active element. Both RF and IF circuits were constructed in the form of superconducting microstriplines using an Si wafer as the dielectric layer. The circuit was tested at a signal frequency of 50 GHz, and the conversion efficiency η was measured at -7.44 dB, for a junction with a 0.42 mV I C R N product. The measured efficiency showed good ageement with the theoretical one calculated using the RSJ model and taking the impedance of the RF source into account.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.21.848