Composite hexagonal ferrite materials
US-10604450-B2 · Mar 31, 2020 · US
Composite hexagonal ferrite materials
US10995034B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10995034-B2 |
| Application number | US-202016795943-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 20, 2020 |
| Priority date | Aug 26, 2016 |
| Publication date | May 4, 2021 |
| Grant date | May 4, 2021 |
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Abstract
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Disclosed herein are embodiments of composite hexagonal ferrite materials formed from a combination of Y phase and Z phase hexagonal ferrite materials. Advantageously, embodiments of the material can have a high resonant frequency as well as a high permeability. In some embodiments, the materials can be useful for magnetodielectric antennas.
First claim
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What is claimed is: 1. A composite hexagonal ferrite material, the material comprising: a base y-phase hexagonal ferrite composition; and a doped-in z phase hexagonal ferrite material having a formula Sr 3-x-y Ba x Na y Co 2-y Sc y Fe 24 O 41 , 0<x<3, 0<y<1.5, forming a composite hexagonal ferrite material having a Q value of greater than 15 at 1 GHz. 2. The composite hexagonal ferrite material of claim 1 wherein the composite hexagonal ferrite material includes two phases. 3. The composite hexagonal ferrite material of claim 1 wherein the composite hexagonal ferrite material has a Q value of greater than 20 at 1 GHz. 4. The composite hexagonal ferrite material of claim 1 wherein the composite hexagonal ferrite material has a real permeability of between 3 and 7 at 1 GHz. 5. The composite hexagonal ferrite material of claim 1 wherein the composite hexagonal ferrite material has a real permeability of greater than 6 at 1 GHz. 6. The composite hexagonal ferrite material of claim 1 wherein the composite hexagonal ferrite material has an imaginary permeability of less than 1 at 1 GHz. 7. The composite hexagonal ferrite material of claim 1 wherein the composite hexagonal ferrite material has a quality factor of greater than 15 at 1 GHz. 8. The composite hexagonal ferrite material of claim 1 wherein the y-phase hexagonal ferrite composition includes Sr 1.6 Na 0.4 Sc 0.4 Co 1.6 Fe 12 O 22 . 9. A method of forming a composite hexagonal ferrite material, the method comprising combining a y-phase hexagonal composition at least partially with a z phase hexagonal ferrite material having a formula Sr 3-x-y Ba x Na y Co 2-y Sc y Fe 24 O 41 , 0<x<3, 0<y<1.5, thereby forming a composite hexagonal ferrite material having a Q value of greater than 15 at 1 GHz. 10. The method of claim 9 further including doping the composite hexagonal ferrite material with indium or zirconium to reduce strontium. 11. The method of claim 9 wherein the composite hexagonal ferrite material has a Q value of greater than about 20 at 1 GHz. 12. The method of claim 9 wherein the composite hexagonal ferrite material has a real permeability of between 3 and 7 at 1 GHz. 13. The method of claim 9 wherein the y-phase hexagonal ferrite composition includes Sr 1.6 Na 0.4 Sc 0.4 Co 1.6 Fe 12 O 22 . 14. An antenna formed from a composite hexagonal ferrite material, the antenna comprising: a base y-phase hexagonal ferrite composition; and a doped-in z phase hexagonal ferrite material having a formula Sr 3-x-y Ba x Na y Co 2-y Sc y Fe 24 O 41 , 0<x<3, 0<y<1.5, forming a composite hexagonal ferrite material having a Q value of greater than 15 at 1 GHz. 15. The antenna of claim 14 wherein the antenna is part of a wireless device. 16. The antenna of claim 14 wherein the antenna is part of a tablet. 17. The antenna of claim 14 wherein the antenna is usable at frequencies of 1 GHz and above. 18. The antenna of claim 14 wherein the composite hexagonal ferrite material has a Q value of greater than about 20 at 1 GHz. 19. The antenna of claim 14 wherein the composite hexagonal ferrite material has a real permeability of between 3 and 7 at 1 GHz. 20. The antenna of claim 14 wherein the y-phase hexagonal ferrite composition includes Sr 1.6 Na 0.4 Sc 0.4 Co 1.6 Fe 12 O 22 .
Assignees
Inventors
Classifications
- H01F1/11Primary
in the form of particles {(for magnetic record carriers G11B5/70626)} · CPC title
containing barium, strontium or calcium · CPC title
Magnetic properties · CPC title
containing rare earths, e.g. (La0.3Sr0.7)CoO3 · CPC title
Hexagonal symmetry, e.g. beta-Si3N4, beta-Sialon, alpha-SiC or hexa-ferrites · CPC title
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Frequently asked questions
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- What does patent US10995034B2 cover?
- Disclosed herein are embodiments of composite hexagonal ferrite materials formed from a combination of Y phase and Z phase hexagonal ferrite materials. Advantageously, embodiments of the material can have a high resonant frequency as well as a high permeability. In some embodiments, the materials can be useful for magnetodielectric antennas.
- Who is the assignee on this patent?
- Skyworks Solutions Inc
- What technology area does this patent fall under?
- Primary CPC classification H01F1/11. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 04 2021 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).