Dielectric duplexer

Patent metadata

Field	Value
Publication number	US-11978940-B2
Application number	US-202117357696-A
Country	US
Kind code	B2
Filing date	Jun 24, 2021
Priority date	Dec 26, 2018
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

The present disclosure relates to dielectric duplexers. One example dielectric duplexer includes a dielectric body, where an input/output structure, a tap, a first resonance structure, and a second resonance structure are provided on surfaces of the dielectric body. The tap and the input/output structure are provided on different surfaces of the dielectric body. The tap and the input/output structure are located between the first resonance structure and the second resonance structure. A first resonator consists of the first resonance structure and the dielectric body around the first resonance structure, and a second resonator consists of the second resonance structure and the dielectric body around the second resonance structure. A conducting layer covers a surface of the input/output structure, the tap, the first resonance structure, and the second resonance structure, and the conducting layer covers the surface of the dielectric body except a region around the input/output structure.

First claim

What is claimed is:

1. A dielectric duplexer, comprising:
a dielectric body, wherein an input/output structure, a tap, a first resonance structure, and a second resonance structure are provided on the dielectric body, wherein the tap, the input/output structure, the first resonance structure, and the second resonance structure are all cavities provided on surfaces of the dielectric body, wherein the tap and the input/output structure are provided on different surfaces of the dielectric body, wherein the tap and the input/output structure are located between the first resonance structure and the second resonance structure, wherein a first resonator consists of the first resonance structure and the dielectric body around the first resonance structure, wherein a second resonator consists of the second resonance structure and the dielectric body around the second resonance structure, and wherein:
a conducting layer covers surfaces the surfaces of the dielectric body, including the input/output structure, the tap, the first resonance structure, and the second resonance structure, wherein the conducting layer does not cover a region around the input/output structure;
the input/output structure is configured to input a signal or output a signal;
the tap is configured to couple a signal from the input/output structure to the first resonator and the second resonator, or the tap is configured to couple a signal from the first resonator and a signal from the second resonator to the input/output structure; and
the first resonator and the second resonator are configured to filter a signal.

2. The dielectric duplexer according to claim 1 , wherein resonance frequencies of the first resonator and the second resonator are different.

3. The dielectric duplexer according to claim 1 , wherein:
the tap is configured to couple an input signal of the input/output structure to the first resonator and the second resonator;
the first resonator is configured to filter the input signal to obtain a first signal; and
the second resonator is configured to filter the input signal to obtain a second signal, wherein frequencies of the second signal and the first signal are different.

4. The dielectric duplexer according to claim 1 , wherein:
the first resonator is configured to obtain a third signal;
the second resonator is configured to obtain a fourth signal, wherein frequencies of the fourth signal and the third signal are different;
the tap is configured to couple the third signal and the fourth signal to the input/output structure; and
the input/output structure is configured to output the third signal and the fourth signal.

5. The dielectric duplexer according to claim 1 , wherein the input/output structure is provided on a first surface of the dielectric body, wherein the tap is provided on a second surface of the dielectric body, wherein the first resonance structure is provided on the first surface or the second surface, wherein the second resonance structure is provided on the first surface or the second surface, and wherein the first surface is parallel to the second surface.

6. The dielectric duplexer according to claim 5 , wherein the tap is in communication with a third surface or a fourth surface of the dielectric body, and wherein the third surface and the fourth surface are perpendicular to the first surface.

7. The dielectric duplexer according to claim 1 , wherein at least one adjusting structure is further provided on the dielectric body, and the at least one adjusting structure is configured to adjust at least one of signal coupling between the tap and the first resonator or signal coupling between the tap and the second resonator.

8. The dielectric duplexer according to claim 7 , wherein at least one of:
the at least one adjusting structure comprises a first adjusting structure, the first adjusting structure is located between the tap and the first resonance structure, and the first adjusting structure is configured to adjust the signal coupling between the tap and the first resonator; or
the at least one adjusting structure comprises a second adjusting structure, the second adjusting structure is located between the tap and the second resonance structure, and the second adjusting structure is configured to adjust the signal coupling between the tap and the second resonator.

9. The dielectric duplexer according to claim 8 , wherein:
the first adjusting structure is a through hole provided on the dielectric body;
the first adjusting structure is a cavity provided on the dielectric body, and the first adjusting structure is provided on a surface different from the surfaces on which the input/output structure, the first resonance structure, and the second resonance structure are provided; or
the first adjusting structure is a first through groove provided on the dielectric body, wherein the first through groove is in communication with the tap and the first resonance structure.

10. The dielectric duplexer according to claim 8 , wherein:
the second adjusting structure is a through hole provided on the dielectric body;
the second adjusting structure is a cavity provided on the dielectric body, and the second adjusting structure is provided on a surface different from the surfaces on which the input/output structure, the first resonance structure, and the second resonance structure are provided; or
the second adjusting structure is a second through groove provided on the dielectric body, wherein the second through groove is in communication with the tap and the second resonance structure.

11. The dielectric duplexer according to claim 1 , wherein the tap is in communication with the input/output structure.

12. The dielectric duplexer according to claim 1 , wherein:
the first resonator is further configured to suppress a signal outside a signal passband of the second resonator; and
the second resonator is further configured to suppress a signal outside a signal passband of the first resonator.

13. A communications apparatus, wherein the communications apparatus comprises a dielectric duplexer, and wherein the dielectric duplexer comprises:
a dielectric body, wherein an input/output structure, a tap, a first resonance structure, and a second resonance structure are provided on the dielectric body, wherein the tap, the input/output structure, the first resonance structure, and the second resonance structure are all cavities provided on surfaces of the dielectric body, wherein the tap and the input/output structure are provided on different surfaces of the dielectric body, wherein the tap and the input/output structure are located between the first resonance structure and the second resonance structure, wherein a first resonator consists of the first resonance structure and the dielectric body around the first resonance structure, wherein a second resonator consists of the second resonance structure and the dielectric body around the second resonance structure, and wherein:
a conducting layer covers surfaces the surfaces of the dielectric body, including the input/output structure, the tap, the first resonance structure, and the second resonance structure, wherein the conducting layer does not cover a region around the input/output structure;
the input/output structure is configured to input a signal or output a signal;
the tap is configured to couple a signal from the input/output structure to the first resonator and the second resonator, or the tap is configured to couple a signal from the first resonator and a signal from the second resonator to the input/output structure; and
the first resonator and the second resonator are configured to filter a

Assignees

• Huawei Tech Co Ltd

Inventors

• Liang Dan
• Zhang Xiaofeng
• Zhao Guoshuai

Classifications

• H01P1/20 Primary

  Frequency-selective devices, e.g. filters · CPC title

• H01P5/12

  Coupling devices having more than two ports (H01P5/04 takes precedence) · CPC title

• H04B1/40

  Circuits · CPC title

• H01P1/2136 Primary

  using comb or interdigital filters; using cascaded coaxial cavities (H01P1/2131, H01P1/2135 take precedence) · CPC title