WO2021135621A1

WO2021135621A1 - Dielectric filter and radio transceiving device comprising same

Info

Publication number: WO2021135621A1
Application number: PCT/CN2020/126106
Authority: WO
Inventors: 朱琦; 倪玉荣
Original assignee: 江苏灿勤科技股份有限公司
Priority date: 2019-12-31
Filing date: 2020-11-03
Publication date: 2021-07-08
Also published as: CN112542666A; CN211629271U; CN111403872A; CN213752979U

Abstract

According to the dielectric filter provided by the present invention, a first negative coupling groove is formed on an upper portion of a dielectric filter body, a second negative coupling groove is formed on a lower portion of the dielectric filter body, and a negative coupling hole that connects the first negative coupling groove and the second negative coupling groove is formed inside the dielectric filter body, so that at least one of the first negative coupling groove, the second negative coupling groove, and the negative coupling hole is located at a position where two dielectric resonators of the dielectric filter are connected, and the capacitive coupling of the dielectric filter can be achieved by means of the combined action of the first negative coupling groove, the second negative coupling groove, and the negative coupling hole. The dielectric filter does not need to be provided with a conductive isolating layer, and is simple in processing process and low in cost. Due to the existence of the first negative coupling groove and the second negative coupling groove, the depth of a blind groove can be greatly reduced, the deformation of a bottom wall of the blind groove is small during sintering, the influence on the depth of the blind groove is small, and the influence on the electrical performance of the dielectric filter is small. The present invention further provides a radio transceiving device comprising the dielectric filter.

Description

Dielectric filter and radio transceiver equipment including the medium filter

Technical field

The present invention relates to the field of electronic communication equipment, and in particular to a dielectric filter and a radio transceiver device including the dielectric filter.

Background technique

With the advent of the "big bang" era of 5G communication, electronic communication equipment has gradually become popular around the world, and filters are an important part of electronic communication equipment, which determines the radiation range and signal strength of electronic base stations and other key factors .

Traditional filters have defects such as large size, high loss, and low dielectric constant, which cannot meet the needs of 5G communications. As a result, the dielectric waveguide filter came into being, it is at the same resonant frequency, the dielectric constant of the dielectric material is higher, and the volume is smaller. With the continuous improvement of base station performance, the performance requirements for filters are getting higher and higher. Traditional dielectric waveguide filters mostly use inductive coupling, which is difficult to meet specific electrical performance requirements such as suppression of the near end of the filter frequency band. To solve this problem, dielectric filters using capacitive coupling have appeared on the market. For example, international patent application WO 2018148905A1 discloses a dielectric filter that realizes capacitive coupling between resonant cavities by arranging through holes and conductive isolation layers on a dielectric block. However, this solution requires an additional conductive isolation layer, the process is complicated, additional equipment is required, and the cost is high; another example is the Chinese invention patent CN104604022B which discloses a method of drilling blind holes on the body made of solid dielectric materials. A dielectric filter with capacitive coupling between the resonators on both sides of the blind hole is realized by the method. However, the blind hole has a deeper hole depth and a smaller aperture, which is difficult to process. In addition, the bottom wall of the blind hole is convex or sintered during sintering. The large deformation caused by the depression seriously affects the accuracy of the blind hole and further affects the electrical performance of the dielectric filter.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a dielectric filter that uses the first negative coupling groove, the second negative coupling groove and the negative coupling hole to work together to achieve capacitive coupling. The dielectric filter does not need to be provided with a conductive partition. Layer, the processing procedure is simple, the cost is low. Due to the existence of the double blind groove, the depth of the blind groove can be greatly reduced. The deformation of the bottom wall of the blind groove during sintering is small, the influence on the depth of the blind groove is small, and the electrical performance of the dielectric filter small.

In order to achieve the above objective, the technical solution adopted by the present invention is:

A dielectric filter includes a dielectric filter body, the dielectric filter includes at least two dielectric resonators, each of the dielectric resonators includes a dielectric resonator body made of ceramic material, and all the dielectrics resonate The body of the dielectric filter together constitutes the body of the dielectric filter, wherein the at least two dielectric resonators include a first dielectric resonator and a second dielectric resonator, and the first resonator includes a first dielectric resonator body, A first debugging hole located on the body of the first dielectric resonator and used to adjust the resonant frequency of the first resonator, the first debugging hole is a blind hole, and the opening of the first debugging hole is located at the The upper surface of the first dielectric resonator body; the second resonator includes a second dielectric resonator body, a second dielectric resonator body located on the second dielectric resonator body and used to adjust the resonant frequency of the second resonator Two debugging holes, the second debugging hole is a blind hole, and the opening of the second debugging hole is located on the upper surface of the second dielectric resonator body;

The dielectric filter further includes:

A first negative coupling groove, the first negative coupling groove is located on the dielectric filter body, and the first negative coupling groove has an opening on the upper surface of the dielectric filter body;

A second negative coupling groove, the second negative coupling groove is located on the dielectric filter body, and the second negative coupling groove has an opening on the lower surface of the dielectric filter body;

A negative coupling hole, the negative coupling hole is located inside the dielectric filter body and communicates with the first negative coupling slot and the second negative coupling slot;

The conductive layer covers the surface of the dielectric filter body, the inner wall surface of the first debugging hole, the inner wall surface of the second debugging hole, the inner wall surface of the first negative coupling groove, and the The inner wall surface of the second negative coupling groove and the inner wall surface of the negative coupling hole;

At least one of the first negative coupling groove, the second negative coupling groove, and the negative coupling hole is located at a position where the first dielectric resonator body and the second dielectric resonator body are connected and connected The first dielectric resonator and the second dielectric resonator, the first negative coupling groove, the second negative coupling groove, and the negative coupling hole are used to realize the connection between the two dielectric resonators Capacitive coupling.

Preferably, the axis of the first debugging hole and the axis of the second debugging hole are parallel to each other and form a virtual plane, and the axis of the negative coupling hole is located in the virtual plane.

Further, the axis of the negative coupling hole, the axis of the first debugging hole, and the axis of the second debugging hole are parallel to each other.

Furthermore, the axis of the first adjusting hole and the axis of the second adjusting hole are symmetrically distributed on both sides of the axis of the negative coupling hole.

Preferably, the first negative coupling groove is intersected with the first debugging hole.

Preferably, the hole depth of the negative coupling hole is greater than or equal to twice the thickness of the conductive layer.

Preferably, most of the first negative coupling groove is located on the first dielectric resonator body, and most of the second negative coupling groove is located on the second dielectric resonator body.

Preferably, the opening of the first negative coupling groove on the upper surface of the dielectric filter body is any one of a circle, an ellipse, and a polygon; the second negative coupling groove is under the dielectric filter body The opening on the surface is any one of a circle, an ellipse, and a polygon.

Preferably, the cross section of the negative coupling hole is any one of a circle, an ellipse, and a polygon.

Preferably, all the dielectric resonator bodies are integrated to form the dielectric filter body.

Preferably, the groove depth of the first negative coupling groove is equal to the groove depth of the second negative coupling groove.

Preferably, the groove depth of the first negative coupling groove is smaller than the hole depth of the first debugging hole/the second debugging hole.

As a preferred embodiment, one side groove wall of the first negative coupling groove and/or one side groove wall of the second negative coupling groove is a circular arc that rotates around the axis of the negative coupling hole surface.

As a preferred embodiment, the opening of the first negative coupling groove on the upper surface of the dielectric filter body and/or the opening of the second negative coupling groove on the lower surface of the dielectric filter body is circular The axis of the first negative coupling slot and/or the axis of the second negative coupling slot are parallel to the axis of the first debugging hole and the axis of the second debugging hole.

As a preferred embodiment, the cross section of the negative coupling hole is circular, and the aperture of the negative coupling hole is smaller than the aperture of the first debugging hole/the second debugging hole.

The present invention also provides a radio transceiver device including the dielectric filter.

In order to achieve the above objective, the technical solution adopted by the present invention further includes a radio transceiver device, and the radio transceiver device includes the dielectric filter described in any one of the foregoing.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

In the dielectric filter provided by the present invention, a first negative coupling groove is arranged on the upper part of the dielectric filter body, a second negative coupling groove is arranged on the lower part of the dielectric filter body, and the first negative coupling groove is arranged inside the dielectric filter body. And the negative coupling hole of the second negative coupling groove, so that at least one of the first negative coupling groove, the second negative coupling groove, and the negative coupling hole is located at the position where the two dielectric resonators of the dielectric filter meet, and can pass through the first negative coupling groove. A negative coupling groove, a second negative coupling groove, and a negative coupling hole realize the capacitive coupling of the dielectric filter. The dielectric filter does not need to be provided with a conductive isolation layer, the processing procedure is simple, and the cost is low. The existence of the second negative coupling groove can greatly reduce the depth of the blind groove, the deformation of the bottom wall of the blind groove during sintering is small, the influence on the depth of the blind groove is small, and the influence on the electrical performance of the dielectric filter is small. The present invention also provides a A radio transceiver device including the dielectric filter.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments described in this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a perspective schematic diagram of Embodiment 1 of a dielectric filter in the present invention.

Fig. 2 is a schematic top view of Fig. 1.

Fig. 3 is a cross-sectional view in the direction of A-A in Fig. 2.

4 is a perspective schematic diagram of Embodiment 2 of the dielectric filter of the present invention.

Fig. 5 is a schematic top view of Fig. 4.

Fig. 6 is a cross-sectional view in the direction of B-B in Fig. 5.

FIG. 7 is a perspective schematic diagram of Embodiment 3 of the dielectric filter of the present invention.

Fig. 8 is a schematic top view of Fig. 7.

Fig. 9 is a cross-sectional view in the direction of C-C in Fig. 8.

FIG. 10 is a perspective schematic diagram of Embodiment 4 of the dielectric filter of the present invention.

FIG. 11 is a schematic top view of FIG. 10.

Fig. 12 is a cross-sectional view in the direction D-D in Fig. 11.

FIG. 13 is a perspective schematic diagram of Embodiment 5 of the dielectric filter of the present invention.

Fig. 14 is a schematic top view of Fig. 13.

Fig. 15 is a cross-sectional view in the direction of E-E in Fig. 14.

FIG. 16 is a perspective schematic diagram of Embodiment 6 of the dielectric filter of the present invention.

FIG. 17 is a schematic top view of FIG. 16.

Fig. 18 is a cross-sectional view in the direction of F-F in Fig. 17.

FIG. 19 is a perspective schematic diagram of Embodiment 7 of the dielectric filter of the present invention.

Fig. 20 is a schematic top view of Fig. 19.

Fig. 21 is a cross-sectional view taken along the G-G direction in Fig. 20;

Fig. 22 is a perspective schematic diagram of Embodiment 8 of the dielectric filter of the present invention.

FIG. 23 is a schematic top view of FIG. 22.

Fig. 24 is a cross-sectional view in the direction of H-H in Fig. 23.

FIG. 25 is a perspective schematic diagram of Embodiment 9 of the dielectric filter of the present invention.

Fig. 26 is a schematic top view of Fig. 25.

Fig. 27 is a cross-sectional view in the direction of I-I in Fig. 26.

FIG. 28 is a perspective schematic diagram of Embodiment 10 of the dielectric filter of the present invention.

Fig. 29 is a schematic top view of Fig. 28.

Fig. 30 is a cross-sectional view taken along the J-J direction in Fig. 29;

FIG. 31 is a perspective schematic diagram of Embodiment 11 of the dielectric filter of the present invention.

Fig. 32 is a schematic top view of Fig. 31.

Fig. 33 is a cross-sectional view taken along the K-K direction in Fig. 32;

FIG. 34 is a perspective schematic diagram of Embodiment 12 of the dielectric filter of the present invention.

FIG. 35 is a schematic top view of FIG. 34.

Fig. 36 is a cross-sectional view taken along the L-L direction in Fig. 35;

Fig. 37 is a three-dimensional perspective schematic diagram of Embodiment 13 of the dielectric filter of the present invention.

Fig. 38 is a schematic top view of Fig. 37.

Fig. 39 is a cross-sectional view in the direction of M-M in Fig. 38;

Fig. 40 is an electrical performance diagram of the dielectric filter embodiment 1 of the present invention.

Among them: 10. Dielectric filter; 101. Dielectric filter body; 20. First dielectric resonator; 201. First dielectric resonator body; 202. First debugging hole; 30. Second dielectric resonator; 301. Section Two dielectric resonator body; 302. The second debugging hole; 41. The first negative coupling slot; 42. The second negative coupling slot; 43. Negative coupling hole; 50. Conductive layer.

Detailed ways

The following describes the technical solutions in the embodiments of the present invention in detail with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in Figure 1 and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or a specific orientation. The azimuth structure and operation cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood in specific situations.

Example 1

As shown in FIGS. 1-3, the dielectric filter 10 provided by the present invention includes two dielectric resonators with the same structure, namely a first dielectric resonator 20 and a second dielectric resonator 30. The first dielectric resonator 20 includes The first dielectric resonator body 201 made of ceramic material and the first debugging hole 202 located on the first dielectric resonator body 201, the first debugging hole 202 is a blind hole, and the opening of the first debugging hole 202 is located in the first On the upper surface of the dielectric resonator body 201, the first debugging hole 202 is used to adjust the resonance frequency of the first dielectric resonator 20; the second dielectric resonator 30 includes a second dielectric resonator body 301 made of ceramic material and a second dielectric resonator body 301. The second debugging hole 302 on the dielectric resonator body 301, the second debugging hole 302 is a blind hole, the opening of the second debugging hole 302 is located on the upper surface of the second dielectric resonator body 301, and the second debugging hole 302 is used for Debug the resonant frequency of the second dielectric resonator 30; the first dielectric resonator body 201 and the second dielectric resonator body 301 are connected to form the dielectric filter body 101, where the first dielectric resonator body 201 and the second dielectric resonator body 201 The dielectric resonator body 301 is integrally arranged.

The dielectric filter 10 further includes a first negative coupling groove 41, a second negative coupling groove 42, a negative coupling hole 43, and a conductive layer 50. The first negative coupling groove 41 is located on the dielectric filter body 101, and the first negative coupling groove 41 Is a blind groove, the first negative coupling groove 41 has an opening on the upper surface of the dielectric filter body 101; the second negative coupling groove 42 is located on the dielectric filter body 101, and the second negative coupling groove 42 is a blind groove. The negative coupling groove 42 has an opening on the lower surface of the dielectric filter body 101; the negative coupling hole 43 is located inside the dielectric filter body 101, and the negative coupling hole 43 is used to connect the first negative coupling groove 41 and the second negative coupling groove 42. Specifically, the negative coupling hole 43 is opened at the bottom of the first negative coupling groove 41 and extends downward until it penetrates the bottom of the second negative coupling groove 42; the conductive layer 50 covers the surface of the dielectric filter body 101, and the first adjustment The inner wall surface of the hole 201, the inner wall surface of the second debugging hole 301, the inner wall surface of the first negative coupling groove 41, the inner wall surface of the negative coupling hole 43 and the inner wall surface of the second negative coupling groove 42, the conductive layer 50 is made of silver .

In this embodiment, the right end of the first negative coupling groove 41, the left end of the second negative coupling groove 42, and the negative coupling hole 43 are all located at the position where the first dielectric resonator 20 and the second dielectric resonator 30 meet, Connected to the first dielectric resonator 20 and the second dielectric resonator 30, the first negative coupling groove 41, the second negative coupling groove 42, and the negative coupling hole 43 are used to realize the first dielectric resonator 20 and the second dielectric resonator 30 Capacitive coupling between.

The axis lines of the first adjustment hole 202 and the second adjustment hole 302 are parallel, the axis lines of the first adjustment hole 202 and the second adjustment hole 302 constitute a virtual plane, and the axis line of the negative coupling hole 43 is located on the virtual plane , And parallel to the axis of the first debugging hole 202 and the second debugging hole 302, the axis of the first debugging hole 202 and the second debugging hole 302 are symmetrically distributed on both sides of the axis of the negative coupling hole 43 , The first negative coupling groove 41 and the second negative coupling groove 42 have the same groove depth, and the groove depth of the first negative coupling groove 41 is smaller than that of the first debugging hole 202 and the second debugging hole 302.

The notch of the first negative coupling groove 41 on the upper surface of the dielectric filter body 101 is rectangular, most of the first negative coupling groove 41 is located on the first dielectric resonator body 201, and the second negative coupling groove 42 is on the dielectric filter 101 The notch on the lower surface is rectangular, most of the second negative coupling groove 42 is located on the second dielectric resonator body 301, and the cross section of the negative coupling hole 43 is any one of a circle, an ellipse, and a polygon. In an example, the cross section of the negative coupling hole 43 is circular, and the diameter of the negative coupling hole 43 is smaller than the diameter of the first debugging hole 202 and the second debugging hole 302.

As shown in FIG. 40, the capacitive coupling between the first dielectric resonator 20 and the second dielectric resonator 30 is realized through the first negative coupling groove 41, the second negative coupling groove 42 and the negative coupling hole 43 to generate a low-end transmission zero point. A; adjust the transmission by adjusting the size of the first negative coupling groove 41 and/or the second negative coupling groove 42, the distance between the first negative coupling groove 41 and the first debugging hole 202, and the diameter and length of the negative coupling hole 43 The strength of the zero point A; the wider the slot width of the first negative coupling slot 41 and/or the second negative coupling slot 42 is, the stronger the strength of the transmission zero point A is, and the enhancement amplitude is similar; the first negative coupling slot 41 and the first debugging hole 202 The closer the distance between them, the stronger the strength of the transmission zero point A, and the enhancement amplitude is similar; the larger the diameter of the negative coupling hole 43, the stronger the strength of the transmission zero point A; the shorter the length of the negative coupling hole 43 in the up and down direction, The stronger the transmission zero point A is.

Example 2

As shown in FIGS. 4-6, the difference between Embodiment 2 and Embodiment 1 is that the cross section of the negative coupling hole 43 in Embodiment 2 is rectangular.

Example 3

As shown in Figures 7-9, the difference between Embodiment 3 and Embodiment 1 is that the right side wall of the first negative coupling groove 41 in Embodiment 3 is an arc surface, and the axis of the arc surface is the same as the negative The axis line of the coupling hole 43 coincides; the left side wall of the second negative coupling groove 42 is an arc surface, and the axis line of the arc surface coincides with the axis line of the negative coupling hole 43.

Example 4

As shown in FIGS. 10-12, the difference between Embodiment 4 and Embodiment 3 is that the cross section of the negative coupling hole 43 in Embodiment 4 is rectangular.

Example 5

As shown in Figures 13-15, the difference between Embodiment 5 and Embodiment 1 is that the opening of the first negative coupling groove 41 on the upper surface of the dielectric filter body 101 in Embodiment 5 is circular, and the first negative coupling groove The axis of 41 is parallel to the axis of the first debugging hole 202 and the second debugging hole 302; the opening of the second negative coupling groove 42 on the lower surface of the dielectric filter body 101 is circular, and the opening of the second negative coupling groove 42 is circular. The axis line is parallel to the axis lines of the first debugging hole 202 and the second debugging hole 302.

Example 6

As shown in FIGS. 16-18, the difference between Embodiment 6 and Embodiment 5 is that the cross section of the negative coupling hole 43 in Embodiment 6 is rectangular.

Example 7

As shown in FIGS. 19-21, the difference between Embodiment 7 and Embodiment 1 is that the side of the first negative coupling groove 41 close to the first debugging hole 202 in the embodiment 7 penetrates the first debugging hole 202. The cavity inside the first debugging hole 202 is communicated with the cavity inside the first negative coupling groove 41.

Example 8

As shown in FIGS. 22-24, the difference between Embodiment 8 and Embodiment 7 is that the cross section of the negative coupling hole 43 in Embodiment 8 is rectangular.

Example 9

As shown in FIGS. 25-27, the difference between the embodiment 9 and the embodiment 3 is that the side of the first negative coupling groove 41 close to the first debugging hole 202 in the embodiment 9 penetrates the first debugging hole 202. The cavity inside the first debugging hole 202 is communicated with the cavity inside the first negative coupling groove 41.

Example 10

As shown in FIGS. 28-30, the difference between Embodiment 10 and Embodiment 9 is that the cross section of the negative coupling hole 43 in Embodiment 10 is rectangular.

Example 11

As shown in Figures 31-33, the difference between Embodiment 11 and Embodiment 5 is that the side of the first negative coupling groove 41 in Embodiment 11 close to the first debugging hole 202 penetrates the first debugging hole 202. The cavity inside the first debugging hole 202 is communicated with the cavity inside the first negative coupling groove 41.

Example 12

As shown in FIGS. 34-36, the difference between Embodiment 12 and Embodiment 11 is that the cross section of the negative coupling hole 43 in Embodiment 12 is rectangular.

Example 13

As shown in FIGS. 37-39, the difference between the embodiment 13 and the embodiment 1 is that the length of the negative coupling hole 43 in the embodiment 13 in the vertical direction is equal to twice the thickness of the conductive layer 50.

In summary, in the dielectric filter provided by the present invention, the first negative coupling groove 41 is provided on the upper part of the dielectric filter body 101, and the second negative coupling groove 42 is provided on the lower part of the dielectric filter body 101. The body 101 is provided with a negative coupling hole 43 connecting the first negative coupling groove 41 and the second negative coupling groove 42 so that at least one of the first negative coupling groove 41, the second negative coupling groove 42, and the negative coupling hole 43 is located in the dielectric filter. At the position where the two dielectric resonators of the filter 10 are connected, the capacitive coupling of the dielectric filter 10 can be realized through the joint action of the first negative coupling groove 41, the second negative coupling groove 42, and the negative coupling hole 43. The device 10 does not need to be provided with a conductive isolation layer, the processing procedure is simple, and the cost is low. Due to the existence of the first negative coupling groove 41 and the second negative coupling groove 42, the depth of the blind groove can be greatly reduced, and the bottom wall of the blind groove is small during sintering. The impact on the depth of the blind groove is small, and the electrical performance of the dielectric filter is small.

The present invention also provides a radio transceiver device. The radio transceiver device includes any one of the dielectric filters in the foregoing embodiments, and the dielectric filter in the radio transceiver device can be used to filter radio frequency signals.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or equipment that includes the element.

The above are only specific implementations of this application. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of this application, several improvements and modifications can be made, and these improvements and modifications are also Should be regarded as the scope of protection of this application.

Claims

A dielectric filter includes a dielectric filter body, characterized in that: the dielectric filter includes at least two dielectric resonators, each of the dielectric resonators includes a dielectric resonator body made of ceramic material, and The dielectric resonator body is integrated to form the dielectric filter body, wherein the at least two dielectric resonators include a first dielectric resonator and a second dielectric resonator,

The first resonator includes a first dielectric resonator body, a first debugging hole located on the first dielectric resonator body and used for debugging the resonant frequency of the first resonator, and the first debugging hole is Blind hole, the opening of the first debugging hole is located on the upper surface of the first dielectric resonator body;

The second resonator includes a second dielectric resonator body, a second debugging hole located on the second dielectric resonator body and used to adjust the resonant frequency of the second resonator, and the second debugging hole is Blind hole, the opening of the second debugging hole is located on the upper surface of the second dielectric resonator body;

The dielectric filter further includes:

The first negative coupling groove, the first negative coupling groove is located on the dielectric filter body, and the first negative coupling groove has an opening on the upper surface of the dielectric filter body, the first negative coupling groove The opening on the upper surface of the dielectric filter body is any one of a circle, an ellipse, and a polygon;

A second negative coupling groove, the second negative coupling groove is located on the dielectric filter body, and the second negative coupling groove has an opening on the lower surface of the dielectric filter body, the second negative coupling groove The opening on the lower surface of the dielectric filter body is any one of a circle, an ellipse, and a polygon;

The negative coupling hole is located inside the dielectric filter body and communicates with the first negative coupling groove and the second negative coupling groove. The axis of the negative coupling hole is connected to the first negative coupling groove. The axis of a debugging hole and the axis of the second debugging hole are parallel to each other, and the axis of the first debugging hole and the axis of the second debugging hole are symmetrically distributed in the negative coupling On both sides of the axis of the hole, the cross section of the negative coupling hole is any one of a circle, an ellipse, and a polygon;

The conductive layer covers the surface of the dielectric filter body, the inner wall surface of the first debugging hole, the inner wall surface of the second debugging hole, the inner wall surface of the first negative coupling groove, and the The inner wall surface of the second negative coupling groove and the inner wall surface of the negative coupling hole;

At least one of the first negative coupling groove, the second negative coupling groove, and the negative coupling hole is located at a position where the first dielectric resonator body and the second dielectric resonator body are connected and connected The first dielectric resonator and the second dielectric resonator, the first negative coupling groove, the second negative coupling groove, and the negative coupling hole are used to realize the connection between the two dielectric resonators Capacitive coupling.
A dielectric filter includes a dielectric filter body, characterized in that: the dielectric filter includes at least two dielectric resonators, each of the dielectric resonators includes a dielectric resonator body made of ceramic material, and The dielectric resonator bodies jointly constitute the dielectric filter body, wherein the at least two dielectric resonators include a first dielectric resonator and a second dielectric resonator,

The first resonator includes a first dielectric resonator body, a first debugging hole located on the first dielectric resonator body and used for debugging the resonant frequency of the first resonator, and the first debugging hole is Blind hole, the opening of the first debugging hole is located on the upper surface of the first dielectric resonator body;

The second resonator includes a second dielectric resonator body, a second debugging hole located on the second dielectric resonator body and used to adjust the resonant frequency of the second resonator, and the second debugging hole is Blind hole, the opening of the second debugging hole is located on the upper surface of the second dielectric resonator body;

The dielectric filter further includes:

A first negative coupling groove, the first negative coupling groove is located on the dielectric filter body, and the first negative coupling groove has an opening on the upper surface of the dielectric filter body;

A second negative coupling groove, the second negative coupling groove is located on the dielectric filter body, and the second negative coupling groove has an opening on the lower surface of the dielectric filter body;

A negative coupling hole, the negative coupling hole is located inside the dielectric filter body and communicates with the first negative coupling slot and the second negative coupling slot;

The conductive layer covers the surface of the dielectric filter body, the inner wall surface of the first debugging hole, the inner wall surface of the second debugging hole, the inner wall surface of the first negative coupling groove, and the The inner wall surface of the second negative coupling groove and the inner wall surface of the negative coupling hole;

At least one of the first negative coupling groove, the second negative coupling groove, and the negative coupling hole is located at a position where the first dielectric resonator body and the second dielectric resonator body are connected and connected The first dielectric resonator and the second dielectric resonator, the first negative coupling groove, the second negative coupling groove, and the negative coupling hole are used to realize the connection between the two dielectric resonators Capacitive coupling.
The dielectric filter according to claim 2, wherein the axis of the first debugging hole and the axis of the second debugging hole are parallel to each other and form a virtual plane, and the negative coupling hole The axis line is located in the virtual plane.
The dielectric filter according to claim 3, wherein the axis of the negative coupling hole, the axis of the first debugging hole, and the axis of the second debugging hole are parallel to each other.
The dielectric filter according to claim 4, wherein the axis of the first debugging hole and the axis of the second debugging hole are symmetrically distributed on two of the axis of the negative coupling hole. side.
The dielectric filter according to claim 2, wherein the first negative coupling groove penetrates the first debugging hole.
The dielectric filter according to claim 2, wherein the depth of the negative coupling hole is greater than or equal to twice the thickness of the conductive layer.
The dielectric filter according to claim 2, wherein most of the first negative coupling groove is located on the body of the first dielectric resonator, and most of the second negative coupling groove is located on the first dielectric resonator body. 2. On the body of the dielectric resonator.
The dielectric filter according to claim 2, wherein the opening of the first negative coupling groove on the upper surface of the dielectric filter body is any one of a circle, an ellipse, and a polygon; The opening of the two negative coupling grooves on the lower surface of the dielectric filter body is any one of a circle, an ellipse and a polygon.
The dielectric filter according to claim 2, wherein the cross section of the negative coupling hole is any one of a circle, an ellipse, and a polygon.
The dielectric filter according to claim 2, wherein all the dielectric resonator bodies are integrally arranged to form the dielectric filter body.
3. The dielectric filter according to claim 2, wherein the groove depth of the first negative coupling groove is equal to the groove depth of the second negative coupling groove.
The dielectric filter according to claim 2, wherein the groove depth of the first negative coupling groove is smaller than the hole depth of the first debugging hole/the second debugging hole.
The dielectric filter according to claim 2, wherein a side wall of the first negative coupling groove and/or a side wall of the second negative coupling groove is formed around the negative coupling hole The arc surface of the axis rotation.
The dielectric filter according to claim 2, wherein the opening of the first negative coupling groove on the upper surface of the dielectric filter body and/or the second negative coupling groove on the dielectric filter body The opening on the lower surface is circular, and the axis of the first negative coupling groove and/or the axis of the second negative coupling groove is parallel to the axis of the first adjusting hole and the second The axis of the debugging hole.
The dielectric filter according to claim 2, wherein the cross section of the negative coupling hole is circular, and the diameter of the negative coupling hole is smaller than that of the first debugging hole/the second debugging hole. Aperture.
A radio transceiver device, characterized in that the radio transceiver device includes the dielectric filter according to any one of claims 1 to 16.