Dielectric resonator and filter

Patent metadata

Field	Value
Publication number	US-11171397-B2
Application number	US-202016861795-A
Country	US
Kind code	B2
Filing date	Apr 29, 2020
Priority date	Nov 14, 2017
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

This application provides a dielectric resonator, including a dielectric body disposed in a hollow conductive housing, where the dielectric body includes a first end face and a second end face that are disposed opposite to each other and a circumferential surface connected between the first end face and the second end face. The first end face is provided with a first groove, the second end face is provided with a second groove, the first end face and the second end face are in contact with an inner wall of the conductive housing, and extension directions of the first groove and the second groove are different. This application further provides a filter. This application can implement single-sided installation of the dielectric resonator, so that an objective of miniaturization is achieved and assembly becomes easy. In addition, coupling between resonance modes can be enhanced because the extension directions of the first groove and the second groove are different.

First claim

What is claimed is:

1. A dielectric resonator, comprising a dielectric body disposed in a hollow conductive housing, wherein the dielectric body comprises a first end face and a second end face that are opposite to each other and a circumferential surface connected between the first end face and the second end face, the first end face is provided with a first groove, the second end face is provided with a second groove, the first end face and the second end face are in contact with an inner wall of the conductive housing, and extension directions of the first groove and the second groove are different.

2. The dielectric resonator according to claim 1 , wherein when the first groove and the second groove are perpendicularly projected on a same plane, a projection of the first groove intersects a projection of the second groove.

3. The dielectric resonator according to claim 1 , wherein the first end face further comprises a conducting layer disposed on a surface on which the first end face is in contact with the conductive housing and the second end face further comprises a conducting layer disposed on a surface on which the second end face is in contact with the conductive housing.

4. The dielectric resonator according to claim 1 , wherein the extension directions of the first groove and the second groove are perpendicular to each other.

5. The dielectric resonator according to claim 1 , wherein the dielectric body has a central axis, the central axis is in line with a connection line between a center of the first end face and a center of the second end face, and the central axis passes through the first groove and the second groove.

6. The dielectric resonator according to claim 1 , wherein the first groove and the second groove form notches on the circumferential surface.

7. The dielectric resonator according to claim 6 , wherein the notches comprise a first notch, a second notch, a third notch, and a fourth notch, the first notch and the second notch are two ends of the first groove, and the third notch and the fourth notch are two ends of the second groove.

8. The dielectric resonator according to claim 1 , wherein the dielectric body comprises a first side wall and a second side wall that are located in the first groove and a first bottom wall connected between the first side wall and the second side wall, and wherein the first side wall, the second side wall, and the first bottom wall are all of a planar shape.

9. The dielectric resonator according to claim 1 , wherein the dielectric body comprises a first side wall and a second side wall that are located in the first groove, and a first bottom wall connected between the first side wall and the second side wall, and wherein the first side wall, the first bottom wall, and the second side wall are sequentially connected to form a smooth and continuously extending arc surface.

10. The dielectric resonator according to claim 1 , wherein the circumferential surface of the dielectric body is a cylindrical surface.

11. The dielectric resonator according to claim 1 , wherein the dielectric body is of a cubic shape.

12. The dielectric resonator according to claim 1 , wherein both the first end face and the second end face are of a planar shape, and both are in surface contact with the inner wall of the conductive housing.

13. A filter comprising a dielectric resonator, the dielectric resonator comprising a dielectric body disposed in a hollow conductive housing, wherein the dielectric body comprises a first end face and a second end face that are opposite to each other and a circumferential surface connected between the first end face and the second end face, the first end face is provided with a first groove, the second end face is provided with a second groove, the first end face and the second end face are in contact with an inner wall of the conductive housing, and extension directions of the first groove and the second groove are different.

14. The filter according to claim 13 , wherein when the first groove and the second groove are perpendicularly projected on a same plane, a projection of the first groove intersects a projection of the second groove.

15. The filter according to claim 13 , wherein the first end face further comprises a conducting layer disposed on a surface on which the first end face is in contact with the conductive housing and the second end face further comprises a conducting layer disposed on a surface on which the second end face is in contact with the conductive housing.

16. The filter according to claim 13 , wherein the extension directions of the first groove and the second groove are perpendicular to each other.

17. The filter according to claim 13 , wherein the dielectric body has a central axis, the central axis is in line with a connection line between a center of the first end face and a center of the second end face, and the central axis passes through the first groove and the second groove.

18. The filter according to claim 13 , wherein the first groove and the second groove form notches on the circumferential surface.

19. The filter according to claim 18 , wherein the notches comprise a first notch, a second notch, a third notch, and a fourth notch, the first notch and the second notch are two ends of the first groove, and the third notch and the fourth notch are two ends of the second groove.

Assignees

• Huawei Tech Co Ltd

Inventors

• Shi Jing
• Pu Guosheng

Classifications

• H01P7/10

  Dielectric resonators · CPC title

• H01P7/105 Primary

  Multimode resonators · CPC title

• H01P1/2084 Primary

  with dielectric resonators · CPC title

• H01P1/20309

  with dielectric resonator · CPC title