Microwave switch having magnetically biased superconductive cond

Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k

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333246, 333258, 333262, 333 99S, 505866, H01P 110

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active

048762393

ABSTRACT:
A microwave switch comprises a transmission line section which separates into two arms, at least one of which can go from a normal state to a superconductive state at a critical temperature, a junction rejoining the two arms in a second microwave transmission line section, and means to control the normal or superconductive state of one arm or of the two arms. The difference in length between the two arms is chosen to be substantially equal to an odd of half wavelengths of operation of the switch in such a way that the switch is off or on when the two arms are respectively in the same state, namely normal or superconductive, or in a different state. The state of the arms can be controlled by a magnetic field which causes the critical temperature to vary.

REFERENCES:
patent: 3522492 (1970-08-01), Pierce
patent: 3769618 (1973-10-01), Freedman
patent: 4695811 (1987-09-01), Grellmann et al.
patent: 4754384 (1988-06-01), Levy et al.
D. M. Kitching. P.I.E.E. (GB) vol. 115, No. 4, Apr. 1968-pp. 479-486, "Narrowband Microwave Suppression Filters".

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