Influence of an external radiation on a Josephson oscillator and phase locking effects
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$sub 0$ approximately 9 GHz is irradiated with an external radiation of frequency f$sub 1$ between 8 and 18 GHz. The Josephson oscillation level and linewidth are measured as a function of the power level of the external signal at f$sub 1$ with deltaf = parallel f$sub 0$ - f$sub 1$ parallel as a parameter. With large deltaf values, the variations of the Josephson oscillation and linewidth are the consequence of the V-I characteristic modification. With low deltaf, the operating point in the VIC is in the induced step curvature, and the observed variations show that progressive phase locking occurs. (auth)
- Research Organization:
- Paris Univ., Orsay France
- NSA Number:
- NSA-33-017114
- OSTI ID:
- 4107092
- Journal Information:
- IEEE Trans. Magn., v. MAG-11, no. 2, pp. 825-828, Conference: Applied superconductivity conference, Oakbrook, Illinois, USA, 30 Sep 1974; Other Information: See CONF-740957--. Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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420201* -Engineering-Facilities & Equipment-Cryogenic & Superconducting Equipment & Devices
*JOSEPHSON JUNCTIONS- OSCILLATIONS
*MULTIPLEXERS- JOSEPHSON JUNCTIONS
ELECTRICAL PROPERTIES
FREQUENCY DEPENDENCE
GHZ RANGE 01-100
POWER