High Q modified barium magnesium tantalate for high frequency applications

Patent metadata

Field	Value
Publication number	US-10308522-B2
Application number	US-201715608170-A
Country	US
Kind code	B2
Filing date	May 30, 2017
Priority date	May 31, 2016
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

Disclosed are embodiments of a barium magnesium tantalate including additional components to increase the Q value of the material. In some embodiments, complex tungsten oxides and/or hexagonal perovskite crystal structures can be added into the barium magnesium tantalate to provide for advantageous properties. In some embodiments, no tin is used in the formation of the material.

First claim

What is claimed is:

1. A dielectric resonator or isolator for applications above 10 GHz, the dielectric resonator comprising:
barium magnesium tantalate; and
one of Ba 2 MgWO 6 , Ba 8 LiTa 5 WO 24 , Ba 8 LiTa 5 WO 24 , Ba 2 MgWO 6 , Ba 3 LaTa 3 O 12 , Ba 8 LiTa 5 WO 24 , BaLaLiWO 6 , Ba 4 Ta 2 WO 12 , Ba 2 La 2 MgW 2 O 12 , BaLaLiWO 6 , Sr 3 LaTa 3 O 12 , and SrLaTaO 12 incorporated into the barium magnesium tantalate to form a composite material having a high Q value of greater than 12000 at 10 GHz.

2. The dielectric resonator or isolator of claim 1 wherein the dielectric resonator is configured to be used at frequencies of about 10 GHz and above.

3. A high Q ceramic material comprising:
barium magnesium tantalate;
about 5 wt. % of a hexagonal perovskite crystal structure; and
MgTa 2 O 6 , the hexagonal perovskite crystal structure and MgTa 2 O 6 incorporated into the barium magnesium tantalate to form a composite material having a high Q value of greater than 12000 at about 10 GHz.

4. The high Q ceramic material of claim 3 wherein the high Q ceramic material does not include tin.

5. A cellular base station including the high Q ceramic material of claim 3 .

6. A millimeter wave filter including the high Q ceramic material of claim claim 3 .

7. A collision avoidance system including the high Q ceramic material of claim 3 .

8. The dielectric resonator or isolator of claim 1 wherein the dielectric resonator or isolator does not include tin.

9. A cellular base station including the dielectric resonator or isolator of claim 1 .

10. A millimeter wave filter including the dielectric resonator or isolator of claim 1 .

11. A collision avoidance system including the dielectric resonator or isolator of claim 1 .

12. A high Q ceramic material comprising:
barium magnesium tantalate; and
one of Ba 2 MgWO 6 , Ba 8 LiTa 5 WO 24 , Ba 8 LiTa 5 WO 24 , Ba 2 MgWO 6 , Ba 3 LaTa 3 O 12 , Ba 8 LiTa 5 WO 24 , BaLaLiWO 6 , Ba 4 Ta 2 WO 12 , Ba 2 La 2 MgW 2 O 12 , BaLaLiWO 6 , Sr 3 LaTa 3 O 12 , and SrLaTaO 12 incorporated into the barium magnesium tantalate to form a composite material having a high Q value of greater than 12000 at 10 GHz.

13. The high Q ceramic material of claim 12 wherein the high Q ceramic material does not include tin.

14. The high Q ceramic material of claim 12 wherein the composite material contains at least 95% barium magnesium tantalate.

15. The high Q ceramic material of claim 12 wherein the composite material contains at least 97% barium magnesium tantalate.

16. The high Q ceramic material of claim 12 wherein the composite material has a dielectric constant of at least 25.

17. The high Q ceramic material of claim 12 wherein the composite material has a Q value of greater than 17000 at about 10 GHz.

18. A cellular base station including the high Q ceramic material of claim 12 .

19. A millimeter wave filter including the high Q ceramic material of claim claim 12 .

20. A collision avoidance system including the high Q ceramic material of claim 12 .

Assignees

• Skyworks Solutions Inc

Inventors

• Hill Michael David

Classifications

• C04B35/495

  based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates · CPC title

• C04B2235/768

  Perovskite structure ABO3 · CPC title

• C04B2235/3255

  Niobates or tantalates, e.g. silver niobate · CPC title

• C04B2235/3206

  Magnesium oxides or oxide-forming salts thereof · CPC title

• C04B2235/80

  Phases present in the sintered or melt-cast ceramic products other than the main phase · CPC title