Influence of an external radiation on a Josephson oscillator and phase locking effects

Author

Vernet, G. ; Adde, R.

Author_Institution

IEEE TMAG

Volume

11

Issue

2

fYear

1975

fDate

3/1/1975 12:00:00 AM

Firstpage

825

Lastpage

828

Abstract

The frequency conversion signal of a Josephson junction operating as an oscillator mixer is not observable when the intermediate frequency is too low. To test experimentally the possibility of phase-locking effects a superconducting point contact oscillating at $f_{0} \\sim 9$ GHz is irradiated with an external radiation of frequency f1between 8 and 18 GHz. The Josephson oscillation level and linewidth are measured as a function of the power level P1of the external signal at f1with $\\delta f = |f_{0}-f_{1}|$ as a parameter. With large $\\delta f$ values, the variations of the Josephson oscillation and linewidth are the consequence of the V-I characteristic modification. With low δf, the operating point in the VIC is in the induced step curvature and the observed variations show that progressive phase looking occurs.

Keywords

Josephson device mixers/frequency converters; Josephson device oscillators; Microwave mixers; Phase-locked oscillators; Bandwidth; Frequency conversion; Frequency measurement; Josephson junctions; Mixers; Oscillators; Phase detection; Power measurement; Radiation detectors; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1975.1058604

Filename

1058604