Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1991-05-13
1992-05-19
Grimm, Siegfried H.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
331 56, 331107S, 357 5, 505702, 505854, H03B 1500
Patent
active
051149125
ABSTRACT:
A two-dimensional array of Josephson junctions is used as a high-frequency oscillator capable of emitting coherent power of predetermined frequencies since the geometry of the two-dimensional array allows the individual Josephson junctions to phase lock at predetermined frequencies. The array is controlled at a given voltage and excited by the application of DC current through the array, in effect providing a rapidly tunable DC-to-AC converter at GHz and THz frequencies. The oscillator operates without the application of external high frequency signals or a connection to a cavity resonator. Load matching and other adjustments can be made by selecting the appropriate number of Josephson junctions in the array, selecting a damping factor which determines non-hysteretic operation, adding resistive shunts or a superconducting ground plane. The two-dimensional array used as an oscillator has advantages over one dimensional arrays in that voltage equalization from junction-to-junction occurs naturally so that phase locking is less likely to be affected by non-identical junctions, greater power output can be realized, an output having a narrower line width is produced and impedance matching is relatively easy.
REFERENCES:
patent: 3628184 (1971-12-01), Thompson
patent: 3822381 (1974-07-01), Scott
patent: 3916340 (1975-10-01), Scott
patent: 3970965 (1976-07-01), Shaprio et al.
patent: 4344052 (1982-08-01), Davidson
patent: 4468635 (1984-08-01), Lukens et al.
patent: 4470023 (1984-09-01), Lukens et al.
Applied Physics Letters publication by Wan et al., entitled "Submillimeter ave Generation Using Josephson Junction Arrays", 54 (18), May 1, 1989, pp. 1805-1807.
Grimm Siegfried H.
Kozlowski Holly D.
The United States of America as represented by the Secretary of
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