US5604375A
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US
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Superconducting active lumped component for microwave device application
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1994-02-28
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Granted: 1997-02-18
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Expires: 2014-02-28
Abstract
Abstract A superconducting active lumped component for microwave device application including a dielectric substrate, a first superconducting portion of an oxide superconductor provided on said dielectric substrate, an insulator layer formed on the first superconducting portion and a second conductive portion arranged on the insulator layer in which the conductivity of the first superconducting electrode and the dielectric property of the insulator layer can be changed by a dc bias voltage applied between the first and the second conductive portion so that capacitance and/or inductance and/or microwave resistance can be changed.
Inventors
- 👤 Alp T. Findikoglu
- 👤 Michitomo Iiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; Y; Y10; Y10S; Y10S505/00; Y10S505/70; Y10S505/701; Y10S505/703; Y10S505/825; Y10S505/866
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
124 words
A superconducting active lumped component for a microwave device comprising: a substrate; a first superconducting portion of an oxide superconductor provided on said substrate; an insulator layer formed on the first superconducting portion; a second conductive portion arranged on the insulator layer, wherein said substrate, said first superconducting portion, said insulator layer, and said second conductive portion form a superconducting active lumped component; and means for applying a dc bias voltage between the first superconducting portion and the second conductive portion, wherein one of a conductivity of the first superconducting portion and a dielectric property of the insulator layer is changed by said dc bias voltage such that one of a microwave reactance and a microwave resistance of the active lumped component is changed.
Claim 2
Dependent Claim
124 words
A superconducting active lumped component for a microwave device comprising: a substrate; a first superconducting portion of an oxide superconductor provided on said substrate; an insulator layer formed on the first superconducting portion; a second conductive portion arranged on the insulator layer, wherein said substrate, said first superconducting portion, said insulator layer, and said second conductive portion form a superconducting active lumped component; and means for applying a dc bias voltage between the first superconducting portion and the second conductive portion, wherein one of a conductivity of the first superconducting portion and a dielectric property of the insulator layer is changed by said dc bias voltage such that one of a microwave reactance and a microwave resistance of the active lumped component is changed.
Claim 3
Dependent Claim
29 words
A superconducting active lumped component as recited in claim 1, wherein the second conductive portion is a superconducting portion of the same oxide superconductor as the first superconducting portion.
Claim 4
Dependent Claim
30 words
A superconducting active lumped component as recited in claim 1, wherein the second conductive portion is a superconducting portion of a different type oxide superconductor from the first superconducting portion.
Claim 5
Dependent Claim
59 words
A superconducting active lumped component as recited in claim 1, wherein said said substrate is a dielectric substrate formed of a material selected from the group consisting of MgO, SrTiO 3 , NdGaO 3 , Y 2 O 3 , LaAlO 3 , LaGaO 3 , Al 2 O 3 , ZrO 2 , Si, GaAs, sapphire and fluorides.
Claim 6
Dependent Claim
110 words
A superconducting inductor, comprising: a dielectric substrate; a superconducting groundplane of an oxide superconductor provided on said dielectric substrate; an insulator layer formed on the superconducting groundplane; a patterned superconducting transmission line of an oxide superconductor arranged on the insulator layer; and means for applying a dc bias voltage between the superconducting groundplane and the patterned superconducting transmission line, wherein a conductivity of the superconducting groundplane, a dielectric property of the insulator layer, and a conductivity of the patterned superconducting transmission line are changed by said dc bias voltage such that one of a microwave inductance of the inductor is shifted and a microwave resistance of the inductor is changed.
Claim 7
Dependent Claim
110 words
A superconducting inductor, comprising: a dielectric substrate; a superconducting groundplane of an oxide superconductor provided on said dielectric substrate; an insulator layer formed on the superconducting groundplane; a patterned superconducting transmission line of an oxide superconductor arranged on the insulator layer; and means for applying a dc bias voltage between the superconducting groundplane and the patterned superconducting transmission line, wherein a conductivity of the superconducting groundplane, a dielectric property of the insulator layer, and a conductivity of the patterned superconducting transmission line are changed by said dc bias voltage such that one of a microwave inductance of the inductor is shifted and a microwave resistance of the inductor is changed.
Claim 8
Dependent Claim
22 words
A superconducting inductor as recited in claim 5, wherein the oxide superconductor is a high critical temperature copper-oxide type oxide superconductor material.
Claim 9
Dependent Claim
58 words
A superconducting inductor as recited in claim 6, wherein the oxide superconductor is a material selected from the group consisting of a Y--Ba--Cu--O type compound oxide superconductor material, a Bi--Sr--Ca--Cu--O type compound oxide superconductor material, and a Tl--Ba--Ca--Cu--O type compound oxide superconductor material, a Hg--Ba--Sr--Ca--Cu--O type compound oxide superconductor material and a Nd--Ce--Cu--O type compound oxide superconductor material.
Claim 10
Dependent Claim
102 words
A superconducting capacitor comprising: a dielectric substrate; a patterned pair of superconducting electrodes of an oxide superconductor provided on said dielectric substrate; an insulator layer formed on the superconducting groundplane; a bias electrode arranged on the insulator layer; and means for applying a dc bias voltage between the pair of superconducting electrodes and the bias electrode, wherein a conductivity of the patterned pair of superconducting electrodes and a dielectric property of the insulator layer are changed by said dc bias voltage such that one of a microwave capacitance of the capacitor is shifted and a microwave resistance of the capacitor is changed.
Claim 11
Dependent Claim
102 words
A superconducting capacitor comprising: a dielectric substrate; a patterned pair of superconducting electrodes of an oxide superconductor provided on said dielectric substrate; an insulator layer formed on the superconducting groundplane; a bias electrode arranged on the insulator layer; and means for applying a dc bias voltage between the pair of superconducting electrodes and the bias electrode, wherein a conductivity of the patterned pair of superconducting electrodes and a dielectric property of the insulator layer are changed by said dc bias voltage such that one of a microwave capacitance of the capacitor is shifted and a microwave resistance of the capacitor is changed.
Claim 12
Dependent Claim
22 words
A superconducting capacitor as recited in claim 8, wherein the oxide superconductor is a high critical temperature copper-oxide type oxide superconductor material.
Claim 13
Dependent Claim
57 words
A superconducting capacitor as recited in claim 9, the oxide superconductor is a material selected from the group consisting of a Y--Ba--Cu--O type compound oxide superconductor material, a Bi--Sr--Ca--Cu--O type compound oxide superconductor material, and a Tl--Ba--Ca--Cu--O type compound oxide superconductor material, a Hg--Ba--Sr--Ca--Cu--O type compound oxide superconductor material and a Nd--Ce--Cu--O type compound oxide superconductor material.
Claim 14
Dependent Claim
30 words
A superconducting inductor as recited in claim 5, wherein said dielectric substrate, said superconducting groundplane, said insulator layer, and said patterned superconducting transmission line form a superconducting active lumped component.
Claim 15
Dependent Claim
31 words
A superconducting capacitor as recited in claim 8, wherein said dielectric substrate, said patterned pair of superconducting electrodes, said insulator layer, and said bias electrode form a superconducting active lumped component.
Claim 16
Dependent Claim
24 words
A superconducting active lumped component as recited in claim 1, wherein said applying means applies said dc bias voltage separately from a microwave signal.
Claim 17
Dependent Claim
30 words
A superconducting active lumped component as recited in claim 1, wherein said dc bias voltage is applied in a direction perpendicular to a direction in which a microwave signal transmits.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-18 | 2000-08-19 | 2001-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-18 | 2004-08-19 | 2005-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-18 | 2008-08-19 | 2009-02-18 | $7700.00 | Window Closed / Lapsed |