IP Library › Granted Patent US 10,026,530
Granted Patent B2
US 10,026,530 · App. 14/887,679 · Granted Jul 17, 2018

Increased resonant frequency potassium-doped hexagonal ferrite

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Quick Facts
Patent No.
US 10,026,530
App. No.
14/887,679
Granted
Jul 17, 2018
Kind
B2
Abstract

Disclosed herein are embodiments of an enhanced resonant frequency hexagonal ferrite material and methods of manufacturing. The hexagonal ferrite material can be Y-phase strontium hexagonal ferrite material. In some embodiments, strontium can be substituted out for a trivalent or tetravalent ion composition including potassium, thereby providing for advantageous properties.

Claims (23)

1. A method for doping a Y-phase hexagonal ferrite material with potassium, the method comprising:

substituting in a trivalent ion composition including potassium and a trivalent ion or a tetravalent ion composition including potassium and a tetravalent ion to form a high resonant frequency hexagonal ferrite having a Y-phase strontium hexagonal ferrite structure, the high resonant frequency hexagonal ferrite composition being Sr 2-x K x Co 2-x M x Fe 12 O 22 when a trivalent ion is used for the substitution, M being any trivalent ion, and the high resonant frequency hexagonal ferrite composition being Sr 2-2x K 2x Co 2-x N x Fe 12 O 22 when a tetravalent ion is used for the substitution, N being any tetravalent ion, x being 0<x≤'1.5 in the trivalent substitution and 0<x≤0.75 in the tetravalent substitution.

2. The method of claim 1 wherein M is selected from the group consisting of Sc, Mn, In, Cr, Ga, Co, Ni, Fe, Yb, or any of the lanthanide ions.

3. The method of claim 1 wherein N is selected from the group consisting of Si, Ge, Ti, Zr, Sn, Ce, Pr, Hf, or Tb.

4. The method of claim 1 wherein the potassium ion comes from potassium carbonate.

5. The method of claim 1 where the high resonant frequency hexagonal ferrite has a loss factor below 1 at 1 GHz.

6. The method of claim 1 wherein the high resonant frequency hexagonal ferrite has a composition of Sr 1.75 K 0.25 Co 1.75 Sc 0.25 Fe 12 O 22 or Sr 1.75 K 0.25 Co 1.75 In 0.25 Fe 12 O 22 .

7. The method of claim 1 wherein the high resonant frequency hexagonal ferrite has a composition of Sr 1.5 K 0.5 Co 1.5 In 0.5 Fe 12 O 22 or Sr 1.5 K 0.5 Co 1.5 In 0.5 Fe 12 O 22 .

8. A antenna for use in radiofrequency operations comprising:

a Y-phase strontium hexagonal ferrite material including a trivalent ion composition including potassium and a trivalent ion or a tetravalent ion composition including potassium and a tetravalent ion substituted in to form a high resonant frequency hexagonal ferrite, the high resonant frequency hexagonal ferrite composition being Sr 2-x K x Co 2-x M x Fe 12 O 22 when a trivalent ion is used for the substitution, M being any trivalent ion, and the high resonant frequency hexagonal ferrite composition being Sr 2-2x K 2x Co 2-x N x Fe 12 O 22 when a tetravalent ion is used for the substitution, N being any tetravalent ion, x being 0<x≤1.5 in the trivalent substitution and 0<x≤0.75 in the tetravalent substitution.

9. The antenna of claim 8 where the high resonant frequency hexagonal ferrite has a loss factor below 1 at 1 GHz.

10. The antenna of claim 8 wherein the high resonant frequency hexagonal ferrite has a composition of Sr 1.75 K 0.25 Co 1.75 Sc 0.25 Fe 12 O 22 or Sr 1.75 K 0.25 Co 1.75 In 0.25 Fe 12 O 22 or Sr 1.5 K 0.5 Co 1.5 In 0.5 Fe 12 O 22 or Sr 15 K 0.5 Co 1.5 In 0.5 Fe 12 O 22 .

11. A potassium doped Y-phase hexagonal ferrite material comprising:

a Y-phase strontium hexagonal ferrite material including a trivalent ion composition including potassium and a trivalent ion or a tetravalent ion composition including potassium and a tetravalent ion substituted in to form a high resonant frequency hexagonal ferrite, the high resonant frequency hexagonal ferrite composition being Sr 2-x K x Co 2-x M x Fe 12 O 22 when a trivalent ion is used for the substitution, M being any trivalent ion, and the high resonant frequency hexagonal ferrite composition being Sr 2-2x K 2x Co 2-x N x Fe 12 O 22 when a tetravalent ion is used for the substitution, N being any tetravalent ion, x being 0<x≤1.5 in the trivalent substation and 0<x≤0.75 in the tetravalent substitution.

12. The doped Y-phase hexagonal ferrite material of claim 11 where the high resonant frequency hexagonal ferrite has a loss factor below 1 at 1 GHz.

13. The doped Y-phase hexagonal ferrite material of claim 11 wherein the high resonant frequency hexagonal ferrite has a composition of Sr 1.75 K 0.25 Co 1.75 Sc 0.25 Fe 12 O 22 or Sr 1.75 K 0.25 Co 1.75 In 0.25 Fe 12 O 22 .

14. The doped Y-phase hexagonal ferrite material of claim 11 wherein the material is substituted with the trivalent ion.

15. The doped Y-phase hexagonal ferrite material of claim 11 wherein the material is substituted with the tetravalent ion.

16. The doped Y-phase hexagonal ferrite material of claim 11 wherein M is selected from the group consisting of Sc, Mn, In, Cr, Ga, Co, Ni, Fe, Yb, or any of the lanthanide ions.

17. The doped Y-phase hexagonal ferrite material of claim 11 wherein N is selected from the group consisting of Si, Ge, Ti, Zr, Sn, Ce, Pr, Hf, or Tb.

18. The doped Y-phase hexagonal ferrite material of claim 11 wherein the high resonant frequency hexagonal ferrite has a composition of Sr 1.5 K 0.5 Co 1.5 In 0.5 Fe 12 O 22 or Sr 1.5 K 0.5 Co 1.5 In 0.5 Fe 12 O 22 .

19. The antenna of claim 8 wherein the material is substituted with the trivalent ion.

20. The antenna of claim 8 wherein the material is substituted with the tetravalent ion.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 11, 2016
From: HILL, MICHAEL DAVID
To: SKYWORKS SOLUTIONS, INC.
Reel/Frame 037719/0541 →