Incorporation of oxides into ferrite material for improved radio radiofrequency properties
Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material and methods of manufacturing. The hexagonal ferrite material can be Y-phase hexagonal ferrite material, such as those including strontium. In some embodiments, oxides consistent with the stoichiometry of Sr 3 Co 2 Fe 24 O 41 , SrFe 12 O 19 or CoFe 2 O 4 can be used form an enhanced hexagonal ferrite material.
1. A hexagonal ferrite material, the material comprising:
a Y-phase hexagonal ferrite having a composition Sr 1.6 Na 0.4 Co 1.6 Sc 0.4 Fe 11 O 22 ; and
an oxide having a composition Sr 3 Co 2 Fe 24 O 41 .
2. The material of claim 1 wherein the material includes about 2 wt. % Sr 3 Co 2 Fe 24 O 41 .
3. The material of claim 2 wherein the material includes 2 wt. % Sr 3 Co 2 Fe 24 O 41 .
4. The material of claim 1 wherein the Sr 1.6 Na 0.4 Co 1.6 Sc 0.4 Fe 11 O 22 is a first phase and the Sr 3 Co 2 Fe 24 O 41 is a second phase.
5. The material of claim 1 wherein the Sr 3 Co 2 Fe 24 O 41 is dissolved into the Sr 1.6 Na 0.4 Co 1.6 Sc 0.4 Fe 11 O 22 .
6. The material of claim 1 wherein the material has a Q value of greater than about 15 at 1 GHz.
7. The material of claim 1 wherein the material has a dielectric constant of about 10 to about 11.
8. A radiofrequency device incorporating the material of claim 1 .
9. The radiofrequency device of claim 8 wherein the radiofrequency device is an antenna.
10. The radiofrequency device of claim 8 wherein the radiofrequency device is a circulator.
11. A power amplifier module comprising:
a radio frequency device including a hexagonal material, the hexagonal material including a Y-phase hexagonal ferrite having a composition Sr 1.6 Na 0.4 Co 1.6 Sc 0.4 Fe 11 O 22 and an oxide having a composition Sr 3 Co 2 Fe 24 O 41 .
12. The power amplifier module of claim 11 wherein the material includes about 2 wt. % Sr 3 Co 2 Fe 24 O 41 .
13. The power amplifier module of claim 11 wherein the material includes 2 wt. % Sr 3 Co 2 Fe 24 O 41 .
14. The power amplifier module of claim 11 wherein the Sr 1.6 Na 0.4 Co 1.6 Sc 0.4 Fe 11 O 22 is a first phase and the Sr 3 Co 2 Fe 24 O 41 is a second phase.
15. The power amplifier module of claim 11 wherein the Sr 3 Co 2 Fe 24 O 41 is dissolved into the Sr 1.6 Na 0.4 Co 1.6 Sc 0.4 Fe 11 O 22 .
16. The power amplifier module of claim 11 wherein the material has a Q value of greater than about 15 at 1 GHz.
17. The power amplifier module of claim 11 wherein the radio frequency device is a circulator.
18. A mobile device comprising:
a radiofrequency device, the radiofrequency device including a hexagonal material, the hexagonal material including a Y-phase hexagonal ferrite having a composition Sr 1.6 Na 0.4 Co 1.6 Sc 0.4 Fe 11 O 22 and an oxide having a composition Sr 3 Co 2 Fe 24 O 41 .
19. The mobile device of claim 18 wherein the material includes about 2 wt. % Sr 3 Co 2 Fe 24 O 41 .
20. The mobile device of claim 18 wherein the material includes 2 wt. % Sr 3 Co 2 Fe 24 O 41 .
21. The mobile device of claim 18 wherein the radiofrequency device is an antenna.
22. The mobile device of claim 18 wherein the radiofrequency device is a circulator.