US5830591A
Expired / Lapsed
US
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Multilayered ferroelectric composite waveguides
Assignee: United States Department of the Army
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Filing: 1996-04-29
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Granted: 1998-11-03
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Expires: 2016-04-29
Abstract
Abstract A multi-layer Ferroelectric composite wave guide in which the effective dielectric constant of the waveguide can be reduced while maintaining tunability. The waveguide is constructed of high and low dielectric constant layers. The multi-layer waveguide is comprised of bias plates which are perpendicular to the laminate direction on direction of film deposition to maintain tunability in the structure.
Inventors
- 👤 Louise Sengupta
- 👤 Michael S. Klushens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; B; B32; B32B; B32B18/00; C04B35/622; C04B35/64; C04B35/645; C04B37/00; C04B37/001; H; H01; H01P; H01P1/00; H01P1/18; H01P1/181; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/345; C04B2237/346; C04B2237/348; C04B2237/50; C04B2237/68; C04B2237/70; C04B2237/704; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24174
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
A multi-layer ferroelectric composite wave-guide comprising: a biased, tape cast laminated layers of Barium-Strontium-Titanate represented by the formula Ba 1-x Sr x TiO 3 , wherein x is greater than 0.0, but less than or equal to 0.75, and a binary compound selected from the group consisting of ZrO 2 , Al 2 O 3 , MgO, MgZrO 3 , MgZrTiO 3 , MgAl 2 O 4 , and MgTiO 3 , in an amount sufficient to provide a composite having a dielectric constant in the range of approximately 5 to 200, a low loss tangent of approximately 0.001, and tunability of approximately 10.41% to about 15.03% at an electric field of 2 V/micron.
Claim 2
Dependent Claim
114 words
A multi-layer ferroelectric composite wave-guide comprising: a biased, tape cast laminated layers of Barium-Strontium-Titanate represented by the formula Ba 1-x Sr x TiO 3 , wherein x is greater than 0.0, but less than or equal to 0.75, and a binary compound selected from the group consisting of ZrO 2 , Al 2 O 3 , MgO, MgZrO 3 , MgZrTiO 3 , MgAl 2 O 4 , and MgTiO 3 , in an amount sufficient to provide a composite having a dielectric constant in the range of approximately 5 to 200, a low loss tangent of approximately 0.001, and tunability of approximately 10.41% to about 15.03% at an electric field of 2 V/micron.
Claim 3
Dependent Claim
17 words
The multi-layer ferroelectric composite wave-guide of claim 1, comprising biased plates positioned perpendicular to the laminate direction.
Claim 4
Dependent Claim
33 words
The multi-layer ferroelectric composite wave-guide of claim 1, wherein the weight ratio of said Barium-Strontium-Titanate to the binary compound is in the range of from approximately 99%-40% Barium-Strontium-Titanate to approximately 1%-40% binary compound.
Claim 5
Dependent Claim
30 words
The multi-layer ferroelectric composite wave-guide of claim 1, wherein the weight of said Barium-Strontium-Titanate to said binary compound is in the ranges of approximately 70% Barium-Strontium-Titanate to 30% binary compound.
Claim 6
Dependent Claim
30 words
The multi-layer ferroelectric composite wave-guide of claim 1 comprising alternating layers of high dielectric constant and low dielectric constant materials sufficient to produce a tunability of >5% with 2.0 V/micron.
Claim 7
Dependent Claim
37 words
The multi-layer ferroelectric composite wave-guide of claim 5 wherein the alternating layers of the high dielectric constant material are 400 <ε r <1500, and the alternating layer of the low dielectric constant material are 11<ε r <100.
Claim 8
Dependent Claim
37 words
The multi-layer ferroelectric composite wave-guide of claim 6, wherein the alternating layer of the high dielectric constant is a screen printed layer of high constant material deposited onto a alternating layer of a low dielectric constant substrate.
Claim 9
Dependent Claim
36 words
The multi-layer ferroelectric composite wave-guide of claim 7, further comprising bias means wherein the bias means is a plate positioned perpendicular to the printed screen and to the alternating layer of a low dielectric constant substrate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-11-02 | 2002-05-04 | 2002-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-02 | 2006-05-04 | 2006-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-02 | 2010-05-04 | 2010-11-03 | $7700.00 | Window Closed / Lapsed |