US4866017A
Expired / Lapsed
US
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Dielectric ceramic composition of matter
Assignee: Kyocera Corp
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Filing: 1988-02-12
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Granted: 1989-09-12
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Expires: 2008-02-12
Abstract
Abstract A dielectric ceramic composition of matter consisting essentially of a range of composition wherein the composition formula represents xBaO.yNd2O3.zTiO2.wBi2O3 wherein 0.110</=x</=0.170, 0.120</=y</=0.180, 0.630</=z</=0.685, 0.020</=w</=0.090, and x+y+z+w=1. The composition of matter provides the advantage that it is high in dielectric constant, small in dielectric loss in high frequency and small in change with respect to temperature of resonance frequency.
Inventors
- 👤 Takashi Okawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:58
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A dielectric resonator for microwaves comprising a dielectric ceramic composition of matter consisting essentially of xBaO yNd.sub.2 O.sub.3 zTiO.sub.2 wBi.sub.2 O.sub.3 wherein 0.141<x<0.157, 0.141<y<0.157, 0.656<z<0.663 and 0.025<w<0.060, and x+y+z+w equals 1, such that in the band of resonance frequency of 500-600 MHz by a re-entrant resonator method, the resonator has a temperature coefficient of resonance frequency within the range from -4.7 to +4.9, dielectric constant greater than 86.8 and dielectric loss less than 5.97×10 -4 .
Claim 2
Dependent Claim
76 words
A dielectric resonator for microwaves comprising a dielectric ceramic composition of matter consisting essentially of xBaO yNd.sub.2 O.sub.3 zTiO.sub.2 wBi.sub.2 O.sub.3 wherein 0.141<x<0.157, 0.141<y<0.157, 0.656<z<0.663 and 0.025<w<0.060, and x+y+z+w equals 1, such that in the band of resonance frequency of 500-600 MHz by a re-entrant resonator method, the resonator has a temperature coefficient of resonance frequency within the range from -4.7 to +4.9, dielectric constant greater than 86.8 and dielectric loss less than 5.97×10 -4 .
Claim 3
Dependent Claim
79 words
A dielectric substrate for microwave circuit elements comprising a dielectric ceramic composition of matter consisting essentially of xBaO yNd.sub.2 O.sub.3 2TiO.sub.2 wBi.sub.2 O.sub.3 wherein 0.141<x<0.157, 0.141<y<0.157, 0.656<Z<0.663 and 0.025<w<0.060, and x+y+z+w equals 1, such that in the band of reasonance frequency of 500-600 MHZ by a re-entrant resonator method, the resonator has a temperature coefficient of resonance frequency within the range from -4.7 to +4.9, dielectric constant greater than 86.8 and a dielectric loss less than 5.97×10 -4 .
Claim 4
Dependent Claim
79 words
A dielectric substrate for microwave circuit elements comprising a dielectric ceramic composition of matter consisting essentially of xBaO yNd.sub.2 O.sub.3 2TiO.sub.2 wBi.sub.2 O.sub.3 wherein 0.141<x<0.157, 0.141<y<0.157, 0.656<Z<0.663 and 0.025<w<0.060, and x+y+z+w equals 1, such that in the band of reasonance frequency of 500-600 MHZ by a re-entrant resonator method, the resonator has a temperature coefficient of resonance frequency within the range from -4.7 to +4.9, dielectric constant greater than 86.8 and a dielectric loss less than 5.97×10 -4 .
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |