IP Library › Granted Patent US 11,373,788
Granted Patent B2
US 11,373,788 · App. 15/972,617 · Granted Jun 28, 2022

Indium containing magnetic garnet materials

Inventors: Michael David Hill (Frederick, MD); David Bowie Cruickshank (Rockville, MD)
Assignee: Skyworks Solutions, Inc.
H01F1/10C01G49/0018C01G49/0036C01G49/0054C01G49/0063H01F1/346H01F41/0266C01P2002/30C01P2002/34C01P2002/52C01P2002/77C01P2006/40C01P2006/42H01P1/36H01P1/38
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 11,373,788
App. No.
15/972,617
Granted
Jun 28, 2022
Kind
B2
Abstract

Disclosed are embodiments of synthetic garnet materials for use in radiofrequency applications. In some embodiments, increased amounts of gadolinium can be added into specific sites in the crystal structure of the synthetic garnet by incorporating indium, a trivalent element. By including both indium and increased amounts of gadolinium, the dielectric constant can be improved. Thus, embodiments of the disclosed material can be advantageous in both above and below resonance applications, such as for isolators and circulators.

Claims (23)

1. A synthetic garnet material comprising a structure including bismuth, gadolinium, iron, and indium, the synthetic garnet material having a dielectric constant value of at least 35, the synthetic garnet material having the chemical composition Bi 1.68 Gd 1.29 Ca 0.03 In 0.57 Hf 0.03 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.26 Ca 0.06 In 0.54 Hf 0.06 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.23 Ca 0.09 In 0.51 Hf 0.09 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.20 Ca 0.12 In 0.48 Hf 0.12 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.17 Ca 0.15 In 0.45 Hf 0.15 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.14 Ca 0.18 In 0.42 Hf 0.18 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.11 Ca 0.21 In 0.39 Hf 0.21 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.08 Ca 0.24 In 0.36 Hf 0.24 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.05 Ca 0.27 In 0.33 Hf 0.27 Fe 4.38 O 11.97 , or Bi 1.68 Gd 1.02 Ca 0.3 In 0.3 Hf 0.3 Fe 4.38 O 11.97 .

2. The synthetic garnet material of claim 1 wherein the synthetic garnet material has a dielectric loss below 0.00250.

3. A method of manufacturing a synthetic garnet material having a dielectric constant of at least 35, the method comprising:

blending a raw material including oxides and/or carbonites; and

calcining the blended materials to form a synthetic garnet material having a crystal structure including bismuth, gadolinium, iron, and indium and having a dielectric constant of at least 35, the synthetic garnet material having the chemical composition Bi 1.68 Gd 1.29 Ca 0.03 In 0.57 Hf 0.03 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.26 Ca 0.06 In 0.54 Hf 0.06 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.23 Ca 0.09 In 0.51 Hf 0.09 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.20 Ca 0.12 In 0.48 Hf 0.12 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.17 Ca 0.15 In 0.45 Hf 0.15 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.14 Ca 0.18 In 0.42 Hf 0.18 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.11 Ca 0.21 In 0.39 Hf 0.21 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.08 Ca 0.24 In 0.36 Hf 0.24 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.05 Ca 0.27 In 0.33 Hf 0.27 Fe 4.38 O 11.97 , or Bi 1.68 Gd 1.02 Ca 0.3 In 0.3 Hf 0.3 Fe 4.38 O 11.97 .

4. The method of claim 3 further comprising forming an isolator or circulator from the synthetic garnet material.

5. A radiofrequency device comprising:

a synthetic garnet material including a structure including bismuth, gadolinium, iron, and indium, the synthetic garnet material having a dielectric constant value of at least 35, the synthetic garnet material having the chemical composition Bi 1.68 Gd 1.29 Ca 0.03 In 0.57 Hf 0.03 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.26 Ca 0.06 In 0.54 Hf 0.06 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.23 Ca 0.09 In 0.51 Hf 0.09 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.20 Ca 0.12 In 0.48 Hf 0.12 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.17 Ca 0.15 In 0.45 Hf 0.15 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.14 Ca 0.18 In 0.42 Hf 0.18 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.11 Ca 0.21 In 0.39 Hf 0.21 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.08 Ca 0.24 In 0.36 Hf 0.24 Fe 4.38 O 11.97 , Bi 1.68 Gd 1.05 Ca 0.27 In 0.33 Hf 0.27 Fe 4.38 O 11.97 , or Bi 1.68 Gd 1.02 Ca 0.3 In 0.3 Hf 0.3 Fe 4.38 O 11.97 .

6. The radiofrequency device of claim 5 wherein the radiofrequency device is incorporated into an antenna.

7. The radiofrequency device of claim 5 wherein the radiofrequency device is an isolator or circulator.

8. The method of claim 3 , wherein the synthetic garnet material has a dielectric loss below 0.00250.

9. The method of claim 3 , further comprising incorporating the synthetic garnet material into a radio frequency device.

10. The method of claim 9 , further comprising incorporating the radio frequency device into an antenna.

11. The radiofrequency device of claim 5 wherein the synthetic garnet material has a dielectric loss below 0.00250.

12. The synthetic garnet material of claim 1 wherein the Ca charge balances the Hf.

13. The synthetic garnet material of claim 1 wherein the Hf sits on an octahedral site.

14. The synthetic garnet material of claim 1 wherein the synthetic garnet material has a dielectric constant of at least 37.

15. The method of claim 3 wherein the Ca charge balances the Hf.

16. The method of claim 3 wherein the Hf sits on an octahedral site.

17. The method of claim 3 wherein the synthetic garnet material has a dielectric constant of at least 37.

18. The radiofrequency device of claim 5 wherein the Ca charge balances the Hf.

19. The radiofrequency device of claim 5 wherein the Hf sits on an octahedral site.

20. The radiofrequency device of claim 5 wherein the synthetic garnet material has a dielectric constant of at least 37.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 8, 2018
From: HILL, MICHAEL DAVID; CRUICKSHANK, DAVID BOWIE
To: SKYWORKS SOLUTIONS, INC.
Reel/Frame 047203/0283 →
Continuity (2)
Provisional Application 62504240 · May 10, 2017
Related Publication 20180330854A1 · Nov 15, 2018
Cited By (2)
US 12,387,861 US 12,590,034