CN111370817A

CN111370817A - Dielectric filter

Info

Publication number: CN111370817A
Application number: CN202010150928.3A
Authority: CN
Inventors: 龙志勇; 肖利蒙; 何钟鑫; 黄伟杰; 黄万强
Original assignee: Guangdong Gova Advanced Material Technology Co ltd
Current assignee: Guangdong Gova Advanced Material Technology Co ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-07-03
Anticipated expiration: 2040-03-06
Also published as: CN111370817B

Abstract

The application discloses dielectric filter includes: the device comprises a plurality of dielectric resonators and non-metal through grooves; a medium resonant cavity formed by blind holes is arranged in the medium resonator; the nonmetal through groove is arranged between two adjacent medium resonant cavities, so that the technical problem that the existing medium filter is complex in processing in a coupling mode is solved.

Description

Dielectric filter

Technical Field

The present application relates to the field of communications technologies, and in particular, to a dielectric filter.

Background

With the development of communication technology, especially the coming of the 5G era, higher requirements are put forward on a communication system architecture, a system module needs to be highly integrated, miniaturized and the like, and a dielectric filter has wide application prospects in 5G communication equipment due to the characteristics of low loss, large peak power, miniaturization and the like.

In order to improve the performance of the dielectric filter, coupling is generally adopted, the existing coupling mode is a pattern coupling mode, a pattern is added between two dielectric resonant cavities for windowing, and coupling is adjusted by changing the size of the pattern, namely the size of a window between the two cavities.

Disclosure of Invention

In view of this, the present application provides a dielectric filter, which solves the technical problem that the coupling mode of the existing dielectric filter is complex to process.

The application provides a dielectric filter, including: the device comprises a plurality of dielectric resonators and non-metal through grooves;

a medium resonant cavity formed by blind holes is arranged in the medium resonator;

the nonmetal through groove is arranged between two adjacent medium resonant cavities.

Alternatively,

the shape of the nonmetal through groove is polygonal.

Alternatively,

the shape of the nonmetal through groove is rectangular.

Alternatively,

the number of the dielectric resonators is 4, and the 4 dielectric resonators are distributed at four vertexes of a rectangle.

Alternatively,

the non-metallic through slot comprises: the first nonmetal through groove, the second nonmetal through groove and the third nonmetal through groove;

the plane where the first nonmetal through groove and the second nonmetal through groove are located is a first plane;

the second plane where the third nonmetal through groove is located is perpendicular to the first plane.

Alternatively,

the dielectric filter further includes: a metal through slot located in the second plane.

Alternatively,

the metal through groove is rectangular.

Alternatively,

the metal through groove extends from the middle part to the edge of the dielectric filter.

Alternatively,

a metal layer is disposed on the dielectric resonator.

Alternatively,

the metal layer is a silver layer.

According to the technical scheme, the method has the following advantages:

the dielectric filter in the present application includes: the device comprises a plurality of dielectric resonators and non-metal through grooves; a medium resonant cavity formed by blind holes is arranged in the medium resonator; the nonmetal through groove is arranged between two adjacent medium resonant cavities. The mode is the coupling between the different blocks of dielectric resonator, the combination that product or pattern windowing need be carried out in the in-process of processing etc., the course of working is complicated, and the dielectric filter in this application, set up nonmetal logical groove between two adjacent dielectric resonator, compare in the mode of current pattern windowing, it can directly to set up nonmetal logical groove between two adjacent dielectric resonator, no longer need the combination between product or the pattern windowing, the course of working is simple, and the setting of nonmetal logical groove, replace the material medium between two adjacent dielectric resonator for the air medium, make the dielectric resonator can couple, thereby the complicated technical problem of coupling mode processing of current dielectric filter has been solved.

Drawings

Fig. 1 is a schematic structural diagram of a dielectric filter according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a dielectric filter in an application example of the present application;

FIG. 3 is a first waveform diagram in an application example of the present application;

FIG. 4 is a second waveform diagram in an application example of the present application;

wherein the reference numbers are as follows:

201. a first dielectric resonant cavity; 202. a second dielectric resonator; 203. a third dielectric resonator; 204. a fourth dielectric resonator; 205. a first non-metallic through slot; 206. a second non-metallic channel; 207. a third non-metallic through slot; 208. and a metal through groove.

Detailed Description

The embodiment of the application provides a dielectric filter, and solves the technical problem that the coupling mode of the existing dielectric filter is complex to process.

The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The present embodiment provides a first embodiment of a dielectric filter, and please refer to fig. 1 specifically.

The dielectric filter in this embodiment includes: the device comprises a plurality of dielectric resonators and non-metal through grooves; a medium resonant cavity formed by blind holes is arranged in the medium resonator; the nonmetal through groove is arranged between two adjacent medium resonant cavities.

When carrying out pattern windowing or when trompil is handled among the prior art, taking into account product property can carry out metallization processing with windowing or hole, however if with the nonmetal logical groove transposition metal of this embodiment leads to the groove, then can cause silver thick liquid extravagant, cost increase, when adopting the metal to lead to the groove, the logical groove of metal mostly adopts to be handled by silver, by silver in-process, the logical groove of seting up can leak silver, causes the extravagant of silver thick liquid, cost increase.

In addition, the non-metal through groove formed in the embodiment replaces the material medium between two adjacent dielectric resonant cavities with the air medium, so that the frequency sensitivity of the dielectric filter can be improved, the loading depth of the dielectric resonant cavities can be reduced, and the resonant frequency position of the dielectric material at the coupling position of the dielectric resonant cavities can be changed.

The mode is the coupling between the different blocks of dielectric resonator, the combination that product or pattern windowing need be carried out in the in-process of processing etc., the course of working is complicated, and the dielectric filter in this application, set up nonmetal logical groove between two adjacent dielectric resonator, compare in the mode of current pattern windowing, it can directly to set up nonmetal logical groove between two adjacent dielectric resonator, no longer need the combination between product or the pattern windowing, the course of working is simple, and the setting of nonmetal logical groove, replace the material medium between two adjacent dielectric resonator for the air medium, make the dielectric resonator can couple, thereby the complicated technical problem of coupling mode processing of current dielectric filter has been solved.

The above is a first embodiment of a dielectric filter provided in the present application, and the following is a second embodiment of a dielectric filter provided in the present application, specifically referring to fig. 1.

The dielectric filter in this embodiment includes: the dielectric filter in this embodiment includes: the device comprises a plurality of dielectric resonators and non-metal through grooves; a medium resonant cavity formed by blind holes is arranged in the medium resonator; the nonmetal through groove is arranged between two adjacent medium resonant cavities.

Specifically, the shape of the non-metal through groove may be various, for example, it may be a polygon, or may be an irregular shape. It can be understood that the non-metal through slots in the present embodiment are rectangular.

Specifically, the number of the plurality of dielectric resonators may be 2, 4, or the like, the number of the dielectric resonators in the present embodiment is 4, and the 4 dielectric resonators are distributed in a rectangular shape with four vertices. Namely a first dielectric resonator 201, a second dielectric resonator 202, a third dielectric resonator 203 and a fourth dielectric resonator 204.

The non-metallic channels include a first non-metallic channel 205, a second non-metallic channel 206, and a third non-metallic channel 207; the plane in which the first non-metallic through slot 205 and the second non-metallic through slot 206 are located is a first plane; the second plane of the third non-metallic channel 207 is perpendicular to the first plane, i.e. a T-shaped mechanism is formed.

Specifically, in this embodiment, after the non-metal through groove is provided, in order to further improve the performance of the dielectric filter, the metal through groove 208 is provided between two dielectric resonators that are not provided with the non-metal through groove, the metal through groove 208 is used to isolate two adjacent dielectric resonators, and the metal through groove 208 and the third non-metal groove are located on the same plane.

It is understood that the shape of the metal through-groove 208 may be various, and the metal through-groove in the present embodiment is rectangular.

Specifically, the metal through-groove in the present embodiment extends from the middle to the edge of the dielectric filter.

The dielectric resonator in this embodiment is provided with a metal layer, which may be a silver layer, a lead layer, a copper layer, or the like.

The above is an embodiment of a dielectric filter provided in the present application, and the following is an application example of a dielectric filter provided in the present application, specifically please refer to fig. 1 to 4.

In this application example, as shown in fig. 1, the structure of the dielectric filter provided in the embodiment of the present application is shown, as shown in fig. 2, the structure of the dielectric filter coupled by the metalized through-slots is shown, the parameters of the two filters are as follows in table 1, the waveform diagram of the structure of fig. 1 corresponds to fig. 3, and the waveform diagram of the structure of fig. 2 corresponds to fig. 4.

TABLE 1

By comparing fig. 3 and fig. 4, it is found that the non-metal through-groove coupling structure can effectively reduce the loading depth of the resonant cavity, and also reduce the external dimension structure, and the insertion loss and harmonic conditions are slightly better than those of the metallized through-groove coupling structure, i.e. it is demonstrated that the metal through-groove can also obtain better coupling performance.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A dielectric filter, comprising: the device comprises a plurality of dielectric resonators and non-metal through grooves;

2. The dielectric filter of claim 1, wherein the non-metallic through slots are polygonal in shape.

3. The dielectric filter of claim 2, wherein the non-metallic through slots are rectangular in shape.

4. The dielectric filter according to claim 1, wherein the number of the dielectric resonators is 4, and the 4 dielectric resonators are arranged at four vertices of a rectangle.

5. The dielectric filter of claim 4, wherein the non-metallic through slots comprise: the first nonmetal through groove, the second nonmetal through groove and the third nonmetal through groove;

6. The dielectric filter of claim 5, further comprising: a metal through slot located in the second plane.

7. A dielectric filter as recited in claim 6, wherein the metal through slots are rectangular in shape.

8. The dielectric filter of claim 7, wherein the metal through-slots extend from a middle to an edge of the dielectric filter.

9. A dielectric filter as recited in claim 1, wherein a metal layer is disposed on the dielectric resonator.

10. A dielectric filter according to claim 9, wherein the metal layer is a silver layer.