WO1994013028B1 - Tunable microwave devices incorporating high temperature superconducting and ferroelectric films - Google Patents

Tunable microwave devices incorporating high temperature superconducting and ferroelectric films

Info

Publication number
WO1994013028B1
WO1994013028B1 PCT/US1993/011780 US9311780W WO9413028B1 WO 1994013028 B1 WO1994013028 B1 WO 1994013028B1 US 9311780 W US9311780 W US 9311780W WO 9413028 B1 WO9413028 B1 WO 9413028B1
Authority
WO
WIPO (PCT)
Prior art keywords
thin film
ferroelectric
superconductive
tuneable
ferroelectric thin
Prior art date
Application number
PCT/US1993/011780
Other languages
French (fr)
Other versions
WO1994013028A1 (en
Filing date
Publication date
Priority claimed from US07/983,632 external-priority patent/US5472935A/en
Application filed filed Critical
Priority to EP94905332A priority Critical patent/EP0672308A4/en
Priority to JP6513506A priority patent/JPH08509103A/en
Priority to KR1019950702249A priority patent/KR960700533A/en
Priority to AU58973/94A priority patent/AU680866B2/en
Publication of WO1994013028A1 publication Critical patent/WO1994013028A1/en
Publication of WO1994013028B1 publication Critical patent/WO1994013028B1/en
Priority to FI953834A priority patent/FI953834A/en

Links

Abstract

The disclosure relates to ferroelectric and superconducting thin films used in combination to produce low-loss frequency tunable microwave and mm-wave devices. Various metal oxide superconducting and ferroelectric films can be arranged in numerous multilayered geometries (figs. 14-19) which can effect microwave and mm-wave signals through the application of a voltage (V) across the ferroelectric film. A preferred embodiment of the invention (figs 1, 2) is the use of the inventive device as a phase shifter or delay line (20) utilizing voltage tunable capacitor structures (21, 23) fabricated from ferroelectric thin films (22) which are responsive to a voltage bias (25). Additional microwave and mm-wave embodiments include resonators (figs 10, 11), filters, coplanar waveguides, phase array antennas (fig. 6), radiative gratings (fig. 7), electrically small antennas (fig. 8), half loop antennas (figs. 23, 24), fringe effect capacitors (figs. 12, 13, 21, 30, 31), artificial transmission lines (fig. 29), etc.

Claims

rece ved y t e nternat ona ureau on une . . ; original claims 1-10 amended; new claim 85 added; remaining claims unchanged (4 pages)]The advantages of the present invention, as well as certain changes and modifications of the disclosed embodiments thereof, will be readily apparent to those skilled in the art. It is the applicants' intention to cover in their claims all those changes and modifications which could be made to the embodiments of the invention herein chosen for the purpose of the disclosure without departing from the spirit and scope of the invention. WHAT IS CLAIMED IS:
1. A tuneable electrical component comprising a thin film of ferroelectric material, the dielectric constant of the ferroelectric thin film being a function of a voltage applied to the ferroelectric thin film, the ferroelectric thin film enabling a circuit to be tuned in response to the dielectric constant of the thin film of ferroelectric thin film when the thin film is connected to the circuit, and a thin film of superconductive material contiguous with the surface of the ferroelectric thin film, the superconductive thin film enabling a voltage to the ferroelectric thin film to determine the dielectric constant thereof.
2. A tuneable electrical component in accordance with claim 1 in which the thin film of ferroelectric material is contiguous with a surface of the thin film of superconductive material which is a high temperature superconductive material.
3. A tuneable electrical component in accordance with claim 1 and further comprising a substrate contiguous with one of the ferroelectric thin film and the superconductive thin film to support the same.
4. A tuneable electrical component in accordance with claim 3 in which the substrate comprises crystalline material.
5. A tuneable electrical component in accordance with claim 1 and
5 5 further comprising means connected to the superconductive thin film for applying a predetermined voltage to the superconductive thin film.
6. A tuneable electrical component in accordance with claim 1 and
further comprising means connected to the superconductive thin film for
applying a variable voltage to the ferroelectric thin film to vary the dielectric
constant of the ferroelectric thin film.
7. A tuneable electrical component in accordane with claim 1 and further comprising an additional thin film of superconductive material
contiguous with the surface of the ferroelectric thin film disposed opposite to
the surface thereof to which the superconductive thin film is contiguous.
8. A tuneable electrical phase shifter comprising a thin film of ferroelectric material, the dielectric constant of the ferroelectric thin film being a function of a voltage applied to the ferroelectric thin film, the ferroelectric thin film when connected to an external biasing circuit enabling the phase shifter to generate a phase shifter in response to the variation of the dielectric constant of the thin film of ferroelectric material, and a thin film of superconductive
material contiguous with a surface of the ferroelectric thin film, the superconductive thin film enabling a voltage to be applied to the ferroelectric
thin film to determine the dielectric constant and thereby the phase shift thereof.
9. A tuneable electrical phase shifter in accordance with claim 8 and
further comprising means for applying a predetermined voltage to the superconductive thin film and thereby to the ferroelectric thin film to determine
the dielectric property of the ferroelectric thin film.
10. A tuneable electrical phase shifter in accordane with claim 9 and
further comprising means for applying a variable voltage to the superconductive
5 6 t n m an t ere y to t e erroe ectr c t n m to vary t e e ec r c constant of the ferroelectric thin film.
11. A tuneable electric antenna component for passing radio frequency energy comprising an elongated base portion of ferroelectric material, the
dielectric property of the ferroelectric material being a function of a voltage
applied to the ferroelectric material, a pluariity of elements extending from the
base portion and spaced apart from one another at a predetermined interval along the length of the base portion, the predetermined interval between each
of the plurality of elements providing a predetermined time delya for radio
frequency engerfy as a fuctionof the dielctric property of the base portion, the
predetermined time delay between each of the plurality of elements causing the radion frequency energy to be passed at a common predetermined angle with respect to each of the plurality of elements.
12. A tuneable electric antenna component for passing radio frequency energy in accordance with claim 11 in which the height of each of the plurality of elements being a fraction of the width of the base portion in the direction in which the plurality of elements extend.
13. A tuneable electric antenna component for passing radio frequency
energy in accordance with claim 1 in which the radio frequency energy is
microwave energy.
14. A tuneable electric antenna component for passing radio frequency
energy in accordance with claim 11 in which the dielectric property of the
ferroelectric material of the base portion which is a function of a voltage applied to the ferroelectric material is the dielectric constant of the ferroelectric material
of the base portion.
57 8 A tuneable electrical component in accordance with claim 1 n which the film of superconductive material is contiguous with a surface of the ferroelectric thin film and is a thin film of high temeprature superconductive
material and further comprising a substrate contiguous with one of the
ferroelectric thin film and the superconductive thin film to support one of the
ferroelectric thin film and the superconductive thin film.
58
PCT/US1993/011780 1992-12-01 1993-12-01 Tunable microwave devices incorporating high temperature superconducting and ferroelectric films WO1994013028A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP94905332A EP0672308A4 (en) 1992-12-01 1993-12-01 Tunable microwave devices incorporating high temperature superconducting and ferroelectric films.
JP6513506A JPH08509103A (en) 1992-12-01 1993-12-01 Tunable microwave device containing high temperature superconducting and ferroelectric films
KR1019950702249A KR960700533A (en) 1992-12-01 1993-12-01 Tunable MICROWAVE DEVICES INCORPORATING HIFH RWMPWEruew SUPERCONDUCTING AND FERROELECTRIC FILMS
AU58973/94A AU680866B2 (en) 1992-12-01 1993-12-01 Tunable microwave devices incorporating high temperature superconducting and ferroelectric films
FI953834A FI953834A (en) 1992-12-01 1995-08-14 Tunable microwave devices containing high temperature superconducting and ferroelectric films

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US07/983,632 1992-12-01
US07/983,632 US5472935A (en) 1992-12-01 1992-12-01 Tuneable microwave devices incorporating high temperature superconducting and ferroelectric films
US14077093A 1993-10-21 1993-10-21
US08/140,770 1993-10-21

Publications (2)

Publication Number Publication Date
WO1994013028A1 WO1994013028A1 (en) 1994-06-09
WO1994013028B1 true WO1994013028B1 (en) 1994-08-04

Family

ID=26838471

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/011780 WO1994013028A1 (en) 1992-12-01 1993-12-01 Tunable microwave devices incorporating high temperature superconducting and ferroelectric films

Country Status (8)

Country Link
US (1) US5694134A (en)
EP (1) EP0672308A4 (en)
JP (1) JPH08509103A (en)
KR (1) KR960700533A (en)
AU (1) AU680866B2 (en)
CA (1) CA2150690A1 (en)
FI (1) FI953834A (en)
WO (1) WO1994013028A1 (en)

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