WO2021135644A1

WO2021135644A1 - Dielectric filter, radio transceiver device and base station

Info

Publication number: WO2021135644A1
Application number: PCT/CN2020/126979
Authority: WO
Inventors: 朱琦; 周鑫童
Original assignee: 江苏灿勤科技股份有限公司
Priority date: 2019-12-31
Filing date: 2020-11-06
Publication date: 2021-07-08
Also published as: CN111211386A; CN211062834U

Abstract

Disclosed are a dielectric filter, a radio transceiver device and a base station. In the dielectric filter, a blind-hole-type debugging hole is formed facing downwards in an upper surface of a dielectric resonator body, and a blind-hole-type negative coupling hole is provided in a lower surface of the dielectric resonator body, such that the negative coupling hole is located at a connection position of two dielectric resonator bodies, the position of the negative coupling hole is connected to two dielectric resonators, a non-closed partition groove is provided in the position of a surface of a dielectric filter body that surrounds the opening of the negative coupling hole, so that capacitive coupling of the dielectric filter can be achieved by means of the combined action of the negative coupling hole and the partition groove, the depth of the negative coupling hole is set to be smaller than or equal to that of the debugging hole, when a ceramic material is sintered at a high temperature, changes of the shape and precision of the negative coupling hole are small, the electrical performance of the dielectric filter is stable, an error in the hole depth of the negative coupling hole can be compensated for by adjusting the shape and size of the partition groove, and machining is convenient.

Description

A dielectric filter, radio transceiver equipment and base station

Priority statement

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office with the application number 201911410162.1 on December 31, 2019, and the Chinese patent application filed with the Chinese Patent Office with the application number 202010134457.7 and the title of the invention on March 02, 2020. The priority of the Chinese patent application of "A dielectric filter and radio transceiver equipment", the entire content of which is incorporated into this application by reference.

Technical field

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

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, the international patent application WO 2018148905 A1 discloses a dielectric that realizes capacitive coupling between resonant cavities by arranging through holes and conductive barriers on a dielectric block. For example, the Chinese invention patent CN104604022B discloses a dielectric filter that realizes capacitive coupling between the resonators on both sides of the blind hole by punching a blind hole on the body made of solid dielectric material, but the international patent application The negative coupling hole in WO 2018148905 A1 is a through hole. The depth of the negative coupling hole in the Chinese invention patent CN104604022B is at least twice the depth of the debugging hole, because the depth of the negative coupling hole in the above two technical solutions is larger , When the ceramic material is sintered at high temperature, it will shrink or collapse, which will make the shape and accuracy of the negative coupling hole greatly change, which will affect 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 with a negative coupling hole whose hole depth is smaller than that of a debugging hole. The shape and accuracy of the negative coupling hole are small when the ceramic material is sintered at a high temperature, and the electrical performance is small. Stable, the present invention also provides a radio transceiver device, which includes the dielectric filter.

In order to achieve the above objectives, the technical solutions provided by the present invention are as follows:

In one aspect, a dielectric filter is provided, including at least two dielectric resonators, each dielectric resonator includes a dielectric resonator body made of ceramic material and a debugging hole with an aperture on the upper surface of the dielectric resonator body, so The debugging hole is a blind hole, and the blind hole is used to adjust the resonance frequency of the dielectric resonator in which it is located; all the dielectric resonator bodies constitute the dielectric filter body, and the dielectric filter further includes:

At least one negative coupling hole, the negative coupling hole is located on the lower surface of the dielectric resonator body, and is located at the connection position of the two dielectric resonator bodies, and the position of the negative coupling hole is relative to the two dielectric resonators Then, the negative coupling hole is a blind hole, and the depth of the negative coupling hole is less than or equal to the depth of the debugging holes of the two dielectric resonators connected at the position;

A conductive layer covering the surface of the dielectric filter body, the inner wall surface of the debugging hole and the inner wall surface of the negative coupling hole;

On the surface of the dielectric filter body, a partition groove is provided around the aperture of the negative coupling hole, and the partition groove has an inner edge close to the aperture of the negative coupling hole and away from the aperture of the negative coupling hole. The outer edge of the part, the end edge for connecting the inner edge and the end of the outer edge, the end edge has at least a pair, and the gap of the partition groove is formed between the adjacent end edges. The surface of the dielectric filter body at the gap is covered with the conductive layer, the area enclosed by the outer edge, the inner edge, and the end edge exposes the body of the dielectric filter, and the negative coupling hole And the isolation groove are used to realize the capacitive coupling between the two dielectric resonators.

Preferably, the depth of the negative coupling hole is smaller than the depth of the debugging holes of the two dielectric resonators that are in contact with each other.

Preferably, the arc of the partition groove is greater than or equal to 240°.

Preferably, the upper surface of the dielectric resonator body is further provided with an auxiliary negative coupling hole, the axis of the auxiliary negative coupling hole coincides with the axis of the negative coupling hole, and the The inner wall is covered by the conductive layer.

Preferably, there are at least two pairs of the end edges, so that the partition groove is composed of at least two sections.

Preferably, the inner edge of the partition groove is spaced apart from the edge of the negative coupling hole opening.

Preferably, the axis of the partition groove coincides with the axis of the negative coupling hole.

Preferably, the depth of the partition groove is greater than or equal to the thickness of the conductive layer and less than twice the thickness of the conductive layer.

On the other hand, a second type of dielectric filter is provided, which includes a dielectric resonator body made of ceramic material and at least two debugging holes with orifices located on the upper surface of the dielectric resonator body. The debugging holes are blind holes. The debugging hole is used to adjust the resonance frequency of the dielectric resonator in which it is located;

At least one negative coupling hole is provided between every two adjacent adjustment holes. The negative coupling hole is a blind hole arranged on the lower surface of the dielectric resonator body. The depth of the negative coupling hole is less than or equal to the The depth of the two debugging holes;

A partition groove surrounding the negative coupling hole is provided on the lower surface of the dielectric resonator body, and the two groove ends of the partition groove are partitioned, and the negative coupling hole and the partition groove are used to realize the The capacitive coupling between the dielectric resonators on both sides of the negative coupling hole;

The surface of the area of the dielectric resonator body excluding the partition groove, the inner wall surface of the debugging hole and the inner wall surface of the negative coupling hole are all covered with a conductive layer.

Optionally, the number of the partition grooves is one or more, there is a distance between the partition groove and the aperture of the negative coupling hole, and all the partition grooves surround more than half of the negative coupling hole.

Further, the upper surface of the dielectric resonator body is further provided with an auxiliary negative coupling hole, the auxiliary negative coupling hole is located above the negative coupling hole, and the negative coupling hole and the auxiliary negative coupling hole are separated, so The inner wall surface of the auxiliary negative coupling hole is covered with the conductive layer.

Preferably, the axis of the auxiliary negative coupling hole is coaxially arranged with the negative coupling hole.

Preferably, the depth of the isolation groove is greater than or equal to the thickness of the conductive layer, and the depth of the isolation groove is less than twice the thickness of the conductive layer.

Optionally, the partition groove is an arc-shaped groove, and the arc of the arc-shaped groove is greater than or equal to 240°.

Optionally, the partition groove is formed by connecting and connecting two or more linear grooves.

Optionally, the partition groove includes an arc-shaped groove and a linear groove that are connected and spliced with each other, and the two linear grooves respectively extend outward from the two groove ends of the arc-shaped groove.

Optionally, the partition groove includes more than two arc-shaped grooves, and the sum of the arcs of all the arc-shaped grooves is greater than or equal to 300°.

Preferably, the center point of the pattern formed by the partition groove is on the axis of the negative coupling hole.

Preferably, the depth of the negative coupling hole is smaller than the depth of the debugging hole. To achieve the foregoing objective, the technical solution provided by the present invention further includes a radio transceiver device, and the transceiver device includes the dielectric filter described in any one of the foregoing.

To achieve the foregoing objective, the technical solution provided by the present invention further includes a base station, and the base station includes the foregoing radio transceiver equipment.

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 blind hole type debugging hole is opened downward on the upper surface of the dielectric resonator body, and a blind hole type negative coupling hole is arranged on the lower surface of the dielectric resonator body, so that the negative coupling hole Located at the connection position of the two dielectric resonator bodies, so that the position of the negative coupling hole is connected to the two dielectric resonators, and an unclosed partition is provided on the body surface of the dielectric filter around the opening of the negative coupling hole The groove can realize the capacitive coupling of the dielectric filter through the joint action of the negative coupling hole and the isolation groove. By setting the depth of the negative coupling hole to be less than or equal to the depth of the debugging hole, the shape and shape of the negative coupling hole during high-temperature sintering of ceramic materials The accuracy change is small, the electrical performance of the dielectric filter is stable, and the error of the negative coupling hole depth can be compensated by adjusting the shape and size of the partition groove, which is convenient for processing. The present invention also provides a radio transceiver device including the above 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 a dielectric filter in Embodiment 1 of the present invention;

FIG. 2 is a schematic top view of the dielectric filter in FIG. 1;

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

Fig. 4 is a partial enlarged view of the dielectric filter at B in Fig. 3;

Fig. 5 is a schematic bottom view of the dielectric filter in Fig. 1;

6 is a perspective schematic diagram of a dielectric filter in Embodiment 2 of the present invention;

FIG. 7 is a schematic bottom view of the dielectric filter in FIG. 6;

Fig. 8 is a cross-sectional view of the dielectric filter in Fig. 7 in the direction C-C;

9 is a perspective schematic diagram of a dielectric filter in Embodiment 3 of the present invention;

FIG. 10 is a schematic bottom view of the dielectric filter in FIG. 9;

FIG. 11 is a schematic top view of the dielectric filter in FIG. 9;

Fig. 12 is a cross-sectional view of the dielectric filter in Fig. 11 in the direction D-D;

13 is a perspective schematic diagram of a dielectric filter in Embodiment 4 of the present invention;

Fig. 14 is a cross-sectional view of the dielectric filter in Fig. 13 in the direction of E-E;

FIG. 15 is a schematic bottom view of the dielectric filter in FIG. 13;

16 is a perspective schematic diagram of a dielectric filter in Embodiment 5 of the present invention;

FIG. 17 is a schematic bottom view of the dielectric filter in FIG. 16;

18 is a perspective schematic diagram of a dielectric filter in Embodiment 6 of the present invention;

Fig. 19 is a schematic bottom view of the dielectric filter in Fig. 18;

20 is a perspective schematic diagram of a dielectric filter in Embodiment 7 of the present invention;

FIG. 21 is a schematic bottom view of the dielectric filter in FIG. 20;

Fig. 22 is a graph of electrical performance of the dielectric filter in Example 1 of the present invention.

The reference signs include: 10-dielectric filter, 101-dielectric resonator body, 20-first dielectric resonator, 201-first body, 202-first debugging hole, 30-second dielectric resonator, 301 -Second body, 302-Second debugging hole, 40-Negative coupling hole, 401-Aperture part, 402-Auxiliary negative coupling hole, 50-Conductive layer, 60-Partition groove, 601-Notch, 602-Inner edge, 603-outer edge, 604-end edge, 605-extended section, 61-first partition groove section, 62-second partition groove section, 63-third partition groove section, 64-interval.

Detailed ways

The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with 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" and "second" 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. 1-5, the dielectric filter provided by the embodiment of the present invention includes a dielectric resonator body 101 made of ceramic material and at least two debugging holes with orifices located on the upper surface of the dielectric resonator body 101. The debugging hole is a blind hole, and the debugging hole is used to adjust the resonance frequency of the dielectric resonator where it is located;

At least one negative coupling hole 40 is provided between every two adjacent debugging holes, that is, if there are four debugging holes arranged in a row, three negative coupling holes 40 are required; if there are three debugging holes distributed in a triangle , Then three negative coupling holes 40 are required. The negative coupling hole 40 is a blind hole provided on the lower surface of the dielectric resonator body 101, and the depth of the negative coupling hole 40 is less than or equal to (preferably less than) the depth of the two debugging holes; Take a debugging hole as an example to illustrate:

The dielectric filter with two debugging holes can be regarded as opening two debugging holes on one dielectric resonator body 101, or it can be regarded as being spliced by the first dielectric resonator 20 and the second dielectric resonator 30 with the same structure. Correspondingly, the two debugging holes are the first debugging hole 202 for debugging the resonant frequency of the first dielectric resonator 20 and the second debugging hole for debugging the resonant frequency of the second dielectric resonator 30 respectively. Hole 302, the first body 201 made of ceramic material of the first dielectric resonator 20 and the second body 301 made of ceramic material of the second dielectric resonator 30 constitute the dielectric resonator body 101, namely The body of the dielectric filter, the negative coupling hole 40 is located at the connection position of the first body 201 of the first dielectric resonator 20 and the second body 301 of the second dielectric resonator 30, that is, the negative coupling hole 40 Is connected to the first dielectric resonator 20 and the second dielectric resonator 30. In this embodiment, the axis lines of the first debugging hole 202 and the second debugging hole 302 are both perpendicular to the dielectric resonance On the upper surface of the device body 101, the axis of the negative coupling hole 40 is parallel to the axis of the first debugging hole 202 and the second debugging hole 302, and is parallel to the first debugging hole 202 and the second debugging hole 302 The axis line of is in the same plane.

A partition groove 60 surrounding the negative coupling hole 40 is provided on the lower surface of the dielectric resonator body 101, and the two groove ends of the partition groove 60 are partitioned (not connected), as shown in FIG. 5 , The partition groove 60 has a gap 601. The negative coupling hole 40 and the isolation groove 60 are used to realize capacitive coupling between the dielectric resonators on both sides of the negative coupling hole 40 (that is, the first dielectric resonator 20 and the second dielectric resonator 30);

The surface of the dielectric resonator body 101 other than the partition groove 60, the inner wall surface of the debugging hole, and the inner wall surface of the negative coupling hole 40 are all covered with a conductive layer 50, and the partition groove 60 has a shape close to the negative The inner edge 602 (inner edge side wall) of the orifice portion 401 of the coupling hole 40, the outer edge 603 (outer edge side wall) away from the orifice portion 401 of the negative coupling hole 40, and the ends for connecting the inner edge 602 and the outer edge 603 The area enclosed by the end edge 604 (end edge side wall) of the outer edge 603, the inner edge side wall of the inner edge 602, and the end edge side wall of the end edge 604 expose the dielectric filter 10 body made of ceramic material.

In the embodiment of the present invention, the partition groove 60 is C-shaped, the partition groove 60 is a circular ring with a notch 601, the arc of the partition groove 60 is greater than 240°, and the arc refers to the center of the circular ring and The included angle of the line between the two end edges 604 of the partition groove 60. There is a distance between the partition groove 60 and the orifice of the negative coupling hole 40, that is, the inner edge 602 of the partition groove 60 and the negative The edges of the opening of the coupling hole 40 are spaced apart. In a preferred embodiment, the axis of the partition groove 60 coincides with the axis of the negative coupling hole 40, that is, the center of the arc-shaped partition groove 60 falls on the The axis of the negative coupling hole 40 is described.

The partition groove 60 in the embodiment of the present invention has a shallow groove structure, the depth of the partition groove 60 is greater than or equal to the thickness of the conductive layer 50, and the depth of the partition groove 60 is less than twice the thickness of the conductive layer 50 Preferably, the depth of the partition groove 60 is equal to the thickness of the conductive layer 50.

Example 2

As shown in Figures 6-8, embodiment 2 is basically the same as embodiment 1, except that the number of partition grooves 60 of the dielectric filter in embodiment 2 is three: the first partition groove section 61, the second partition The groove section 62 and the third partition groove section 63 have a gap 64 between adjacent partition groove sections, and the surface of the gap 64 is covered with a conductive layer 50. The first partition groove section 61, the second partition groove section 62, and the third partition groove section 63 surround more than half of the negative coupling hole (40). Preferably, the first partition groove section 61 and the second partition groove section 62. The third partition groove sections 63 are all arc-shaped, and the sum of the arcs of the three partition groove sections is preferably greater than 300°. The same content as in Example 1 is introduced in Example 2 by reference.

Example 3

As shown in Figures 9-12, embodiment 3 is basically the same as embodiment 1, except that: the upper surface of the dielectric resonator body 101 of the dielectric filter 10 of the dielectric filter in the embodiment 3 is also provided with auxiliary negative coupling Hole 402, the auxiliary negative coupling hole 402 is located above the negative coupling hole 40, the auxiliary negative coupling hole 402 is a blind hole, that is, the negative coupling hole 40 and the auxiliary negative coupling hole 402 are separated (not connected), so The inner wall surface of the auxiliary negative coupling hole 402 is covered with the conductive layer 50. In this embodiment, the axis line of the auxiliary negative coupling hole 402 coincides with the axis line of the negative coupling hole 40. In this embodiment The aperture of the auxiliary negative coupling hole 402 is greater than or equal to the aperture of the negative coupling hole 40. The same content as in Example 1 is introduced in Example 3 by reference. In this embodiment, by providing the auxiliary negative coupling hole 402, the depth of the negative coupling hole 40 is made shallower than the depth of the negative coupling hole 40 in other embodiments, and it is not easy to shrink when the ceramic material is sintered at a high temperature. Or collapse to ensure the stability of the shape and accuracy of the negative coupling hole.

Example 4

As shown in Figures 13-15, embodiment 4 is basically the same as embodiment 1, except that the partition groove 60 of the dielectric filter in embodiment 4 includes arc-shaped grooves and linear grooves that are connected and spliced with each other. The end edge 604 of the end portion 60 extends in parallel outward to form an extension section 605. Preferably, the linear groove of the extension section 605 is perpendicular to the long side of the dielectric resonator body 101. The same content as in Example 1 is introduced in Example 4 by reference.

Example 5

As shown in Figures 16-17, Embodiment 5 is basically the same as Embodiment 2, except that the number of partition grooves 60 of the dielectric filter in Embodiment 5 is two: the first partition groove section 61 and the second partition槽段62。 Slot section 62. Preferably, the first partition groove section 61 and the second partition groove section 62 are both arc-shaped, and the sum of the arcs of the two partition groove sections is preferably greater than 300°. The same content as in Example 2 is introduced in Example 5 by reference.

Example 6

As shown in Figures 18-19, embodiment 6 is basically the same as embodiment 1, except that: the partition groove 60 of the dielectric filter in the embodiment 6 is formed by splicing and connecting five linear grooves, and the partition groove 60 is formed The pattern of is a rectangle with a gap, and the gap exists on one of the sides of the rectangle (preferably a square). The side of the rectangle with the gap is preferably parallel to the long side of the dielectric resonator body 101. The same content as in Example 1 is introduced in Example 6 by reference.

Example 7

As shown in Figures 20-21, Embodiment 7 is basically the same as Embodiment 1, except that: the partition groove 60 of the dielectric filter in Example 6 is formed by splicing and connecting seven linear grooves, and the partition groove 60 is formed The pattern of is a hexagon with a gap, and the gap exists on one of the sides of the hexagon (preferably a regular hexagon), and the side with the gap is preferably parallel to the long side of the dielectric resonator body 101. The same content as in Example 1 is introduced in Example 7 by reference.

Some of the technical solutions of the above embodiments can be combined to obtain new embodiments. For example, the extension section 605 in embodiment 4 can be combined with embodiments 2, 3, 5, 6, and 7, to obtain new embodiments, which will not be repeated here. .

According to the above-mentioned embodiment, the dielectric filter 10 in which three or more dielectric resonators are spliced to form an integrated structure is a simple modification or structure superposition, which also falls within the protection scope of the present invention.

In the dielectric filter provided by the embodiment of the present invention, a blind hole type debugging hole is provided on the upper surface of the dielectric resonator body, that is, the opening of the debugging hole is provided on the upper surface of the dielectric resonator body, and the The debugging hole has a certain depth downward from the upper surface of the dielectric resonator body (but does not penetrate), and a blind hole-type negative coupling hole is provided on the lower surface of the dielectric resonator body, that is, the aperture of the negative coupling hole is set On the lower surface of the dielectric resonator body, the negative coupling hole is positioned at the connection position of the two dielectric resonator bodies, and the position where the negative coupling hole is located is connected to the two dielectric resonators, and the dielectric filter An unclosed isolation groove is provided on the surface of the body around the opening of the negative coupling hole, and the capacitive coupling of the dielectric filter can be realized through the joint action of the negative coupling hole and the isolation groove, and the depth of the negative coupling hole is set to be less than or equal to debugging The depth of the hole, the shape and accuracy of the negative coupling hole during high-temperature sintering of ceramic materials are small, the electrical performance of the dielectric filter is stable, and the error of the hole depth of the negative coupling hole can be compensated by adjusting the shape and size of the partition groove, which is convenient for processing.

As shown in FIG. 22, the dielectric filter 10 in all the above embodiments generates a transmission zero point A at the low frequency end of the filter passband B through the negative coupling hole 40 and the partition groove 60; by adjusting the depth, diameter, and diameter of the negative coupling hole 40 The radian of the partition groove 60 and the distance between the inner edge 602 and the outer edge 603 of the partition groove 60 adjust the strength of the transmission zero point A; the larger the diameter of the negative coupling hole 40, the stronger the transmission zero point A; the deeper the negative coupling hole 40, The stronger the transmission zero point A; the greater the distance between the inner edge 602 and the outer edge 603 of the partition groove 60, the stronger the transmission zero point A; the greater the arc of the partition groove 60, the stronger the transmission zero point A.

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

The embodiment of the present invention also provides a base station, including the radio transceiver equipment in the above-mentioned embodiment.

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, characterized in that it includes at least two dielectric resonators, each dielectric resonator includes a dielectric resonator body (101) made of ceramic material and an orifice is located on the upper surface of the dielectric resonator body (101) The debugging hole is a blind hole, and the blind hole is used to adjust the resonance frequency of the dielectric resonator in which it is located; all the dielectric resonator bodies (101) constitute the dielectric filter body, and the dielectric filter The device also includes:

At least one negative coupling hole (40), the negative coupling hole (40) is located on the lower surface of the dielectric resonator body (101) and at the connection position of the two dielectric resonator bodies (101), the negative coupling hole (40) 40) is connected to the two dielectric resonators, the negative coupling hole (40) is a blind hole, and the depth of the negative coupling hole (40) is less than or equal to the two The depth of the debugging hole of the dielectric resonator;

A conductive layer (50) covering the surface of the dielectric filter body, the inner wall surface of the debugging hole and the inner wall surface of the negative coupling hole (40);

On the surface of the dielectric filter body, a partition groove (60) is provided around the aperture portion of the negative coupling hole (40), and the partition groove (60) has an aperture portion close to the negative coupling hole (40) The inner edge (602), the outer edge (603) away from the aperture of the negative coupling hole (40), and the end edge for connecting the inner edge (602) and the outer edge (603) end (604), there is at least one pair of the end edges (604), a gap (601) of the partition groove (60) is formed between the adjacent end edges (604), and the dielectric resonator body ( 101) The surface is covered with the conductive layer (50), and the area enclosed by the outer edge (603), the inner edge (602), and the end edge (604) exposes the dielectric filter The body, the negative coupling hole (40) and the isolation groove (60) are used to realize the capacitive coupling between the two dielectric resonators.
A dielectric filter (10), characterized in that it comprises a dielectric resonator body (101) made of ceramic material, at least two debugging holes are opened on the upper surface of the dielectric resonator body (101), and the debugging The hole is a blind hole, and the debugging hole is used to adjust the resonance frequency of the dielectric resonator where it is located;

At least one negative coupling hole (40) is provided between every two adjacent adjustment holes. The negative coupling hole (40) is a blind hole arranged on the lower surface of the dielectric resonator body (101). The depth of the coupling hole (40) is less than or equal to the depth of the two debugging holes;

A partition groove (60) surrounding the negative coupling hole (40) is provided on the lower surface of the dielectric resonator body (101), and the two groove ends of the partition groove (60) are partitioned, and the The negative coupling hole (40) and the partition groove (60) are used to realize capacitive coupling between the dielectric resonators on both sides of the negative coupling hole (40);

The surface of the dielectric resonator body (101) other than the partition groove (60), the inner wall surface of the debugging hole and the inner wall surface of the negative coupling hole (40) are all covered with a conductive layer (50).
The dielectric filter according to claim 1 or 2, characterized in that, the number of the partition groove (60) is one or more, and the partition groove (60) and the hole of the negative coupling hole (40) There is a gap between the ports, and all the partition grooves (60) surround more than half of the negative coupling hole (40).
The dielectric filter according to claim 1 or 2, wherein the upper surface of the dielectric resonator body (101) is further provided with an auxiliary negative coupling hole (402), and the auxiliary negative coupling hole (402) is located at Above the negative coupling hole (40), and the negative coupling hole (40) and the auxiliary negative coupling hole (402) are separated, and the inner wall surface of the auxiliary negative coupling hole (402) is covered with the conductive layer (50).
The dielectric filter according to claim 4, wherein the axis of the auxiliary negative coupling hole (402) is coaxially arranged with the negative coupling hole (40).
The dielectric filter according to claim 1 or 2, wherein the depth of the partition groove (60) is greater than or equal to the thickness of the conductive layer (50), and the depth of the partition groove (60) is less than The conductive layer (50) is twice the thickness.
The dielectric filter according to claim 1 or 2, wherein the partition groove (60) is an arc-shaped groove, and the arc of the arc-shaped groove is greater than or equal to 240°.
The dielectric filter according to claim 1 or 2, wherein the partition groove (60) is formed by connecting and connecting two or more linear grooves.
The dielectric filter according to claim 1 or 2, wherein the partition groove (60) comprises an arc-shaped groove and a linear groove that are connected and spliced with each other, and the two linear grooves are separated from two of the arc-shaped grooves. The groove ends extend outward.
The dielectric filter according to claim 1 or 2, wherein the partition groove (60) includes more than two arc-shaped grooves, and the sum of the arcs of all the arc-shaped grooves is greater than or equal to 300°.
The dielectric filter according to claim 1 or 2, wherein the center point of the pattern formed by the partition groove is on the axis of the negative coupling hole (40).
The dielectric filter according to claim 1 or 2, characterized in that the depth of the negative coupling hole (40) is smaller than the depth of the debugging hole.
The dielectric filter according to claim 1, wherein the inner edge of the partition groove (60) is spaced apart from the edge of the opening of the negative coupling hole (40).
A radio transceiver device, characterized by comprising the dielectric filter according to any one of claims 1-12.
A base station, characterized by comprising the radio transceiver equipment according to claim 13.