Superconducting devices having a variable conductivity device fo

Details Superconducting devices having a variable conductivity device fo Superconducting devices having a variable conductivity device fo

1991-06-24

1994-07-12

Lee, Benny T.

Superconductor technology: apparatus, material, process

High temperature devices, systems, apparatus, com- ponents,...

High frequency waveguides, resonators, electrical networks,...

505700, 505701, 505866, 333 99S, 333202, 333204, H01L 3900, H01P 1201

Patent

active

053288939

ABSTRACT:
Active superconductive devices are formed having a variable conductive element in electromagnetic contact with a superconductor. In one embodiment, a variable ohmic conductive device, such as a photoconductor, is placed adjacent a superconductor. By varying the optical radiation on the photoconductor, the electromagnetic environment adjacent the superconductor is changed, resulting in changed electrical properties. The superconductor may be patterned as a reject filter, with a photoconductor forming a microwave switch. Alternatively, a delay line plus variable ohmic element forms a phase shifter.

REFERENCES:
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patent: 4990487 (1991-02-01), Masumi
patent: 5097128 (1997-03-01), Jack
patent: 5116807 (1992-05-01), Romanofsky et al.
Neikirk et al; "Optically-controlled Coplanar Waveguide Phase Shifters" Microwave Journal; Dec. 1989; pp. 77-88.
Glass, N. E., and Rogovin D.; "Optically Control of Microwave Propagation in Superconducting Devices"; Appl. Phys. Lett.; No. 54; 9 Jan. 1988, pp. 182-184.

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