Resonator, filter, dynamic antenna element, and remote radio unit

Patent metadata

Field	Value
Publication number	US-2025293423-A1
Application number	US-202519222061-A
Country	US
Kind code	A1
Filing date	May 29, 2025
Priority date	Nov 30, 2022
Publication date	Sep 18, 2025
Grant date	—

Abstract

A resonator includes a dielectric body including a top and bottom surface, and side walls between the top and bottom surface. The resonator further includes at least two first blind vias within the dielectric body, a through groove between at least two first blind vias, and at least one second blind via is on a side wall of the side walls between the at least two first blind vias. The at least two first blind vias extend toward the bottom surface. The at least two first blind vias are arranged in a first direction. The at least one second blind via extends from a surface of the side wall of the side walls to the through groove. An extension direction of the at least one second blind via is perpendicular to the first direction. The at least one second blind via and the through groove are separated from each other.

First claim

1 . A resonator, comprising:
a dielectric body comprising:
a top surface;
a bottom surface opposite from the top surface; and
side walls between the top surface and the bottom surface;
at least two first blind vias within the dielectric body, the at least two first blind vias extend from the top surface toward the bottom surface, and the at least two first blind vias are arranged in a first direction; a through groove between at least two first blind vias; and at least one second blind via is on a side wall of the side walls between the at least two first blind vias, the at least one second blind via extends from a surface of the side wall of the side walls to the through groove, an extension direction of the at least one second blind via is perpendicular to the first direction, and the at least one second blind via and the through groove are separated from each other.

2 . The resonator according to claim 1 , the at least one second blind via comprises:
two second blind vias between the at least two first blind vias, and the two second blind vias are symmetrically opposite of two opposite sides of the through groove in the extension direction.

3 . The resonator according to claim 2 , wherein
the side walls comprise:
a first side wall; and
a second side wall opposite from the first side wall, and the first side wall and the second side wall are arranged in the extension direction;
wherein one of the second blind vias of the two second blind vias is on the first side wall, and the other of the second blind vias of the two second blind vias is on the second side wall.

4 . The resonator according to claim 1 , wherein the at least two first blind vias are symmetrically opposite of two opposite sides of the through groove in the first direction.

5 . The resonator according to claim 1 , wherein in the first direction, the at least one second blind via is located at a central position between the at least two first blind vias.

6 . The resonator according to claim 1 , further comprising:
a third blind via within the dielectric body, and extending from the top surface to the bottom surface, and on a plane parallel to the top surface, the third blind via and the at least one second blind via are separately located on two opposite sides of the through groove.

7 . The resonator according to claim 6 , wherein in a direction from the top surface to the bottom surface, a depth of the third blind via is greater than a depth of the first blind via.

8 . The resonator according to claim 6 , wherein in the first direction, the third blind via is located at a central position between the at least two first blind vias.

9 . A filter, comprising:
a resonator, comprising:
a dielectric body, comprising:
a top surface;
a bottom surface opposite from the top surface; and
side walls between the top surface and the bottom surface;

at least two first blind vias within the dielectric body, the at least two first blind vias extend from the top surface toward the bottom surface, and the at least two first blind vias are arranged in a first direction;
a through groove between at least two first blind vias; and
at least one second blind via is on a side wall of the side walls between the at least two first blind vias, the at least one second blind via extends from a surface of the side wall of the side walls to the through groove, an extension direction of the at least one second blind via is perpendicular to the first direction, and the at least one second blind via and the through groove are separated from each other.

10 . The filter according to claim 9 , the at least one second blind via comprises:
two second blind vias between the at least two first blind vias, and the two second blind vias are symmetrically opposite of two opposite sides of the through groove in the extension direction.

11 . The filter according to claim 10 , wherein
the side walls comprise:
a first side wall; and
a second side wall opposite from the first side wall, and the first side wall and the second side wall are arranged in the extension direction;
wherein one of the second blind vias of the two second blind vias is on the first side wall, and the other of the second blind vias of the two second blind vias is on the second side wall.

12 . The filter according to claim 9 , wherein the at least two first blind vias are symmetrically opposite of two opposite sides of the through groove in the first direction.

13 . The filter according to claim 9 , wherein in the first direction, the at least one second blind via is located at a central position between the at least two first blind vias.

14 . The filter according to claim 9 , further comprising:
a third blind via within the dielectric body, and extending from the top surface to the bottom surface, and on a plane parallel to the top surface, the third blind via and the at least one second blind via are separately located on two opposite sides of the through groove.

15 . A dynamic antenna element, comprising:
a filter, comprising:
a resonator, comprising:
a dielectric body comprising:
a top surface;
a bottom surface opposite from the top surface; and
side walls between the top surface and the bottom surface;

at least two first blind vias within the dielectric body, the at least two first blind vias extend from the top surface toward the bottom surface, and the at least two first blind vias are arranged in a first direction;
a through groove between at least two first blind vias; and
at least one second blind via is on a side wall of the side walls between the at least two first blind vias, the at least one second blind via extends from a surface of the side wall of the side walls to the through groove, an extension direction of the at least one second blind via is perpendicular to the first direction, and the at least one second blind via and the through groove are separated from each other.

16 . The dynamic antenna element according to claim 15 , wherein the at least one second blind via comprises:
two second blind vias between the at least two first blind vias, and the two second blind vias are symmetrically opposite of two opposite sides of the through groove in the extension direction.

17 . The dynamic antenna element according to claim 16 , wherein
the side walls comprise:
a first side wall; and
a second side wall opposite from the first side wall, and the first side wall and the second side wall are arranged in the extension direction;
wherein one of the second blind vias of the two second blind vias is on the first side wall, and the other of the second blind vias of the two second blind vias is on the second side wall.

18 . The dynamic antenna element according to claim 15 , wherein the at least two first blind vias are symmetrically opposite of two opposite sides of the through groove in the first direction.

19 . The dynamic antenna element according to claim 15 , wherein in the first direction, the at least one second blind via is located at a central position between the at least two first blind vias.

20 . The dynamic antenna element according to claim 15 , further comprising:
a third blind via within the dielectric body, and extending from the top surface to the bottom surface, and on a plane parallel to the top surface, the third blind via and the at least one second blind via are separately located on two opposite sides of the through groove.

Assignees

• Huawei Tech Co Ltd

Inventors

• Qiao Dongchun
• Liu Yi
• Song Yanlin
• Pu Guosheng

Classifications

• H01P1/2088 Primary

  Integrated in a substrate · CPC title

• H01P7/06

  Cavity resonators · CPC title

• H01P1/2002

  Dielectric waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) · CPC title

• H01P1/2082

  with multimode resonators (H01P1/2086 takes precedence) · CPC title

• H01P7/105 Primary

  Multimode resonators · CPC title