Superconducting devices having a variable conductivity device for introducing energy loss
AssigneeSuperconductor Technologies, Inc.
InventorsJonathan Z. Sun, Robert B. Hammond, Douglas J. Scalapino
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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.
Claims11
An active superconducting device comprising:
- a passive superconductive device for receiving a current from a current source which generates an electromagnetic field adjacent the passive superconductive device, and
- a variable conductivity device said variable conductivity device being separate from the passive superconductive device, the variable conductivity device being located within the electromagnetic field of the passive superconductive device, said variable conductivity device introducing a variable energy loss to the electromagnetic field from the superconductive device.
A superconductive filter comprising:
- a superconductive resonator disposed on a substrate,
- an input and an output electromagnetically coupled to said superconductive resonator, the input receiving a signal energy to be filtered and the output providing a filtered signal energy and
- a photoconductor disposed adjacent the superconductive resonator whereby when said photoconductor is illuminated signal energy is lost from the resonator.
Dependencies are inferred from the claim text.