Dielectric resonator/filter including a metallized dielectric body having a blind hole therein with a demetallized notch that is sealed by a metallized sealing part

Patent metadata

Field	Value
Publication number	US-9780428-B2
Application number	US-201514884532-A
Country	US
Kind code	B2
Filing date	Oct 15, 2015
Priority date	Apr 16, 2013
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

The present application provides a dielectric resonator, a dielectric filter, a base station and a method for fabricating the dielectric resonator or the dielectric filter. The dielectric resonator includes: a solid dielectric resonator body, a blind hole located on one side of the solid dielectric resonator body, a metalized layer covering both a surface of the solid dielectric resonator body and a surface of the blind hole, and a demetallized notch located at the metalized layer on the surface of the blind hole. The dielectric resonator provided in the present application can implement tuning of the dielectric resonator, and reduce impact on the resonance frequency of the dielectric resonator after the dielectric resonator is tuned, where the impact caused by that the demetallized notch is covered by a metal material in an assembly process of the dielectric resonator, and signal energy that is leaked from the notch is reduced.

First claim

What is claimed is:

1. A dielectric resonator comprising:
a solid dielectric resonator body;
a blind hole located on one side of the solid dielectric resonator body;
a metalized layer covering both a surface of the solid dielectric resonator body and a surface of the blind hole;
a demetallized notch located at the metalized layer on the surface of the blind hole; and
a metalized sealing part that is configured to seal the demetallized notch and that is located a determined spacing away from the demetallized notch.

2. The dielectric resonator according to claim 1 , wherein a depth of the blind hole is determined according to a dielectric constant of a dielectric of the dielectric resonator and a resonance frequency of the dielectric resonator.

3. The dielectric resonator according to claim 1 , wherein:
the metalized sealing part is located inside the blind hole and connected to the surface of the blind hole; and
a surface, oriented in a same direction as an opening of the blind hole, of the metalized sealing part is a metalized surface.

4. The dielectric resonator according to claim 1 , wherein:
the metalized sealing part is located outside the blind hole and connected to the metalized layer surrounding an opening side of the blind hole; and
a surface, connecting to the metalized layer surrounding the opening side of the blind hole, of the metalized sealing part is a metalized surface.

5. The dielectric resonator according to claim 1 , wherein the determined spacing is used to reduce impact of the metalized sealing part on a resonance frequency of the dielectric resonator.

6. The dielectric resonator according to claim 5 , wherein a width of the determined spacing is related to a dielectric constant of a dielectric of the dielectric resonator and the resonance frequency of the dielectric resonator.

7. The dielectric resonator according to claim 1 , wherein the demetallized notch is related to a resonance frequency of the dielectric resonator.

8. The dielectric resonator according to claim 7 , wherein an area of the demetallized notch is related to the resonance frequency of the dielectric resonator.

9. The dielectric resonator according to claim 1 , wherein the demetallized notch is located at an inner bottom of the blind hole.

10. A base station, comprising a dielectric filter, the dielectric filter comprising a dielectric resonator, wherein the dielectric resonator comprises:
a solid dielectric resonator body;
a blind hole located on one side of the solid dielectric resonator body;
a metalized layer covering both a surface of the solid dielectric resonator body and a surface of the blind hole;
a demetallized notch located at the metalized layer on the surface of the blind hole; and
a metalized sealing part that is configured to seal the demetallized notch and that is located a determined spacing away from the demetallized notch.

11. The base station according to claim 10 , wherein:
the metalized sealing part is located inside the blind hole and connected to the surface of the blind hole; and
a surface, oriented in a same direction as an opening of the blind hole, of the metalized sealing part is a metalized surface.

12. The base station according to claim 10 , wherein:
the metalized sealing part is located outside the blind hole and connected to the metalized layer surrounding an opening side of the blind hole; and
a surface, connecting to the metalized layer surrounding the opening side of the blind hole, of the metalized sealing part is a metalized surface.

13. A dielectric filter comprising a dielectric resonator, wherein the dielectric resonator comprises:
a solid dielectric resonator body;
a blind hole located on one side of the solid dielectric resonator body;
a metalized layer covering both a surface of the solid dielectric resonator body and a surface of the blind hole;
a demetallized notch located at the metalized layer on the surface of the blind hole; and
a metalized sealing part that is configured to seal the demetallized notch and that is located a determined spacing away from the demetallized notch.

14. The dielectric filter according to claim 13 , wherein:
the metalized sealing part is located inside the blind hole and connected to the surface of the blind hole; and
a surface, oriented in a same direction as an opening of the blind hole, of the metalized sealing part is a metalized surface.

15. The dielectric filter according to claim 13 , wherein:
the metalized sealing part is located outside the blind hole and connected to the metalized layer surrounding an opening side of the blind hole; and
a surface, connecting to the metalized layer surrounding the opening side of the blind hole, of the metalized sealing part is a metalized surface.

Assignees

• Huawei Tech Co Ltd

Inventors

• Yuan Bengui
• Wang Qiang

Classifications

• H01P7/04

  Coaxial resonators · CPC title

• H01P1/2084

  with dielectric resonators · CPC title

• H01P7/10

  Dielectric resonators · CPC title

• H01P1/2056 Primary

  Comb filters or interdigital filters with metallised resonator holes in a dielectric block · CPC title

• H01P7/06 Primary

  Cavity resonators · CPC title