Duplexer and communications system having duplexer

Patent metadata

Field	Value
Publication number	US-9929713-B2
Application number	US-201615183300-A
Country	US
Kind code	B2
Filing date	Jun 15, 2016
Priority date	Dec 16, 2013
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

The present disclosure is applicable to the field of communications device technologies is directed to a duplexer and a communications system having the duplexer. The duplexer includes a body, where an input port and an output port are disposed on the body, a cavity is disposed on the body, a dielectric resonator is disposed in the cavity, the input port is connected to an input-end coupling plate disposed opposite to the dielectric resonator, the output port is connected to an output-end coupling plate disposed opposite to the dielectric resonator, a tuning screw is connected to the body, and a central axis of the dielectric resonator misaligns with a central axis of the cavity. The communications system includes the duplexer.

First claim

What is claimed is:

1. A duplexer, comprising:
a body; and
a tuning screw connected to the body,
wherein an input port, an output port, and a cavity are disposed on the body,
wherein a dielectric resonator is disposed in the cavity,
wherein the input port is connected to an input-end coupling plate disposed opposite to the dielectric resonator,
wherein the output port is connected to an output-end coupling plate disposed opposite to the dielectric resonator,
wherein a central axis of the dielectric resonator misaligns with a central axis of the cavity, and
wherein the dielectric resonator is disposed and shifted toward a position of at least one of the input port and the output port relative to the central axis of the cavity.

2. The duplexer according to claim 1 , wherein a dielectric tuner is further disposed in the cavity, and wherein the dielectric tuner is located over the dielectric resonator and is connected to the body using a first connecting member.

3. The duplexer according to claim 2 , wherein a central axis of the dielectric tuner coincides with the central axis of the dielectric resonator.

4. The duplexer according to claim 1 , wherein a supporting dielectric is further disposed in the cavity, and wherein the supporting dielectric is located under the dielectric resonator and is connected to the body using a second connecting member.

5. The duplexer according to claim 4 , wherein a central axis of the supporting dielectric coincides with the central axis of the dielectric resonator.

6. The duplexer according to claim 1 , wherein the input port comprises:
an input-end interior conductor; and
an input-end exterior conductor,
wherein the input-end interior conductor is covered by the input-end exterior conductor with a spacing,
wherein the output port comprises:
an output-end interior conductor; and
an output-end exterior conductor,
wherein the output-end interior conductor is covered by the output-end exterior conductor with a spacing,
wherein the input-end coupling plate is connected to the input-end interior conductor, and
wherein the output-end coupling plate is connected to the output-end interior conductor.

7. The duplexer according to claim 6 , wherein the input-end exterior conductor and the output-end exterior conductor are both formed on the body in an integrated manner.

8. The duplexer according to claim 1 , wherein a cross-section of the cavity takes on a circular or rectangular shape, and wherein a cross-section of the dielectric resonator takes on a circular or rectangular shape.

9. The duplexer according to claim 1 , wherein the body comprises:
a first body; and
a second body,
wherein the first body and the second body are butted and disposed up and down,
wherein an upper half cavity is disposed at a lower end of the first body, and
wherein a lower half cavity is disposed at an upper end of the second body.

10. The duplexer according to claim 9 , wherein pin holes are disposed on the first body and an end face opposite to the first body, wherein positioning pins are inserted in the pin holes, and wherein the first body and the second body are fixedly connected using a locking member.

11. The duplexer according to claim 1 , wherein at least two cavities are disposed, wherein the dielectric resonator is disposed in each cavity, wherein the input port is connected to at least one of the two cavities, wherein the output port is disposed on the other of the two cavities, wherein the at least two cavities are connected using a coaxial connecting bar, wherein end parts that are of the coaxial connecting bar and that stretch into the cavities are each connected to a coupling plate disposed opposite to the dielectric resonator, and wherein the coaxial connecting bar comprises:
an input end;
an output end;
a short-circuited end; and
a connecting port,
wherein the input end and the output end are connected to the at least two cavities.

12. The duplexer according to claim 11 , wherein the coaxial connecting bar is at least one of a T-shaped coaxial connecting bar and a cross-shaped coaxial connecting bar.

13. The duplexer according to claim 12 , wherein two adjacent cavities are connected using two cross-shaped coaxial connecting bars, or connected using two T-shaped coaxial connecting bars, or connected using one T-shaped coaxial connecting bar and one cross-shaped coaxial connecting bar.

14. The duplexer according to claim 1 , wherein two cavities are disposed, wherein the two cavities are respectively a first cavity and a second cavity that are disposed adjacently, wherein two dielectric resonators are disposed, wherein the two dielectric resonators are respectively a first dielectric resonator and a second dielectric resonator, wherein the first dielectric resonator is disposed in the first cavity, wherein the second dielectric resonator is disposed in the second cavity, wherein the input port is connected to the first cavity, wherein the output port is connected to the second cavity, wherein the first cavity and the second cavity are connected using a coaxial connecting bar, and wherein two ends of the coaxial connecting bar are respectively connected to a coupling plate opposite to the first dielectric resonator and a coupling plate opposite to the second dielectric resonator.

15. The duplexer according to claim 14 , wherein: the input port on the first cavity and the output port on the second cavity are both perpendicular to a connecting line that connects a central axis of the first cavity and a central axis of the second cavity, wherein the input port on the first cavity and the output port on the second cavity are disposed in opposite directions, wherein the first dielectric resonator in the first cavity is shifted in a direction of the input port and the coaxial connecting bar to misalign with the central axis of the first cavity, and wherein the second dielectric resonator in the second cavity is shifted in a direction of the output port and the coaxial connecting bar to misalign with the central axis of the second cavity.

16. The duplexer according to claim 15 , wherein the coaxial connecting bar is a T-shaped coaxial connecting bar, wherein the T-shaped coaxial connecting bar comprises:
a short-circuited end;
an input end connected to the first cavity; and
an output end connected to the second cavity, and wherein the input end and the output end are disposed in opposite directions.

17. The duplexer according to claim 15 , wherein the coaxial connecting bar is a cross-shaped coaxial connecting bar, wherein the cross-shaped coaxial connecting bar comprises:
a short-circuited end;
a connecting end;
an input end connected to the first cavity; and
an output end connected to the second cavity, wherein the input end and the output end are disposed in opposite directions.

18. The duplexer according to claim 1 , wherein four cavities are disposed, wherein the four cavities are respectively a first cavity, a second cavity, a third cavity, and a fourth cavity that are disposed in two rows and two columns, wherein four dielectric resonators are disposed, wherein the four dielectric resonators are respectively a first dielectric resonator, a second dielectric resonator, a third dielectric resonator, and a fourth dielectric resonator, wherein the first dielectric resonator is disposed in the first cavity, wherein the second dielectric resonator is disposed in the second cavity, wherein the third dielectric resonator is disposed in the third cavity, wherein the fourth dielectric resonator is disposed

Assignees

• Huawei Tech Co Ltd

Inventors

• Wong Sai-Wai
• Chu Qingxin
• Zhou Yanzhao

Classifications

• H01P5/12

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

• H01P1/2084 Primary

  with dielectric resonators · CPC title

• H01P7/105

  Multimode resonators · CPC title

• H01P1/2138

  using hollow waveguide filters (H01P1/2131 takes precedence) · CPC title

• H03H7/465 Primary

  having variable circuit topology, e.g. including switches · CPC title