Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control
Patent
1993-05-25
1995-01-03
Sikes, William L.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Frequency or repetition rate conversion or control
327527, H03B 1900
Patent
active
053789490
ABSTRACT:
The present invention is a superconducting flux flow mixer which has two control lines. Preferably, the mixer comprises a grounded superconducting signal line wherein portions of the superconducting signal line are etched away to form superconducting weak links within the superconducting signal line, a local oscillator and RF control line disposed on either side of the superconducting weak links, and a substrate upon which the control lines and superconducting signal line are disposed. When cooled to a temperature close to the critical temperature of the superconducting weak links, the resistance of the weak links can be manipulated by a magnetic field created by current flowing through the local oscillator and RF control lines. By using two control lines, better control of frequency is attained while at the same time providing better stability and a decrease in size of prior art mixers.
REFERENCES:
patent: 5229655 (1994-07-01), Martens et al.
J. S. Martens, "The Models and Applications of a High Frequency Three Teral Device Made of High Temperature Superconductors," Ph.D. Thesis, University of Wisconsin, Madison, 1990, pp. 254-259.
J. S. Martens et al, "S-Parameter Measurements and Applications of Superconducting Flux Flow Transistors", IEEE MTT-S Digest, pp. 1231-1234, 1991.
R. S. Pengelly, "Microwave Field Effect Transistors--Theory, Design and Applications", Research Studies Press, pp. 233-236, 1982.
J. H. Hinken, Superconductor Electronics, Springer-Verlag, 1989, pp. 4-12.
Babbitt Richard W.
Cadotte, Jr. Roland
Cummings Michael
Rachlin Adam
Anderson William H.
Dudek James
Sikes William L.
The United States of America as represented by the Secretary of
Zelenka Michael
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