Enhanced Q high dielectric constant material for microwave applications
US-9755293-B2 · Sep 5, 2017 · US
Temperature compensated dielectric material
US10315959B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10315959-B2 |
| Application number | US-201715714934-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 25, 2017 |
| Priority date | Sep 29, 2016 |
| Publication date | Jun 11, 2019 |
| Grant date | Jun 11, 2019 |
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Abstract
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Disclosed are embodiments of tungsten bronze crystal structures that can have both a high dielectric constant and low temperature coefficient, making them advantageous for applications that experience temperature changes and gradients. In particular, tantalum can be substituted into the crystal structure to improve properties. Embodiments of the material can be useful for radiofrequency applications such as resonators and antennas.
First claim
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What is claimed is: 1. A ceramic material comprising: Ba, Sm, Ti, Ta, and O having a tungsten bronze crystal structure, the ceramic material having a dielectric constant of at least 60, and temperature coefficient of resonant frequency of less than 15, and a Qf at 1 GHz of at least 7000. 2. The ceramic material of claim 1 wherein the ceramic material contains no aluminum. 3. The ceramic material of claim 1 wherein the ceramic material has a dielectric consent of at least 80. 4. The ceramic material of claim 1 wherein the temperature coefficient of resonant frequency of the ceramic material is less than 5. 5. The ceramic material of claim 1 wherein the ceramic material has a Qf at 1 GHz of at least 8000. 6. A ceramic material having a high dielectric constant while maintaining a low temperature coefficient of resonant frequency, the ceramic material comprising: a chemical formula Ba 12+3x Sm 28−3x Ti 54−3x Ta 3x O 162 , x being between 0 and having a tungsten bronze crystal structure. 7. The ceramic material of claim 6 wherein the ceramic material has a chemical formula of Ba 12.6 Sm 27.4 Ti 53.4 Ta 0.6 O 162 . 8. The ceramic material of claim 6 wherein the ceramic material has a dielectric constant of at least 60 and a temperature coefficient of resonant frequency of less than 15. 9. The ceramic material of claim 8 wherein the temperature coefficient of resonant frequency is less than 5. 10. The ceramic material of claim 6 wherein the ceramic material has no rutile or perovskite phase. 11. The ceramic material of claim 6 wherein the ceramic material has a Qf at 1 GHz of at least 7000. 12. The ceramic material of claim 6 wherein the ceramic material has a Qf at 1 GHz of at least 8000. 13. The ceramic material of claim 1 wherein the ceramic material has no rutile or perovskite phase. 14. The ceramic material of claim 1 wherein the ceramic material has a Qf at 1 GHz of at least 7000. 15. A ceramic material having a high dielectric constant while maintaining a low temperature coefficient of resonant frequency, the ceramic material comprising a chemical formula of Ba 12.6 Sm 27.4 Ti 53.4 Ta 0.6 O 162 . 16. The ceramic material of claim 15 wherein the ceramic material has a tungsten bronze crystal structure. 17. The ceramic material of claim 15 wherein the ceramic material has a dielectric constant of at least 60 and a temperature coefficient of resonant frequency of less than 15. 18. The ceramic material of claim 17 wherein the temperature coefficient of resonant frequency is less than 5. 19. The ceramic material of claim 15 wherein the ceramic material has no rutile or perovskite phase. 20. The ceramic material of claim 15 wherein the ceramic material has a Qf at 1 GHz of at least 8000.
Assignees
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Classifications
ceramics · CPC title
Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide · CPC title
- C04B35/62675Primary
characterised by the treatment temperature · CPC title
Crystal structural characteristics, e.g. symmetry · CPC title
Titanates (C01G23/001 takes precedence) · CPC title
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Frequently asked questions
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- What does patent US10315959B2 cover?
- Disclosed are embodiments of tungsten bronze crystal structures that can have both a high dielectric constant and low temperature coefficient, making them advantageous for applications that experience temperature changes and gradients. In particular, tantalum can be substituted into the crystal structure to improve properties. Embodiments of the material can be useful for radiofrequency applica…
- Who is the assignee on this patent?
- Skyworks Solutions Inc
- What technology area does this patent fall under?
- Primary CPC classification C04B35/62675. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 11 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).