CN114335935A - Dielectric filter - Google Patents

Abstract

The utility model provides a dielectric filter, dielectric filter includes dielectric cavity and antenna panel subassembly, and the surface of dielectric cavity is electrically conductive surface, and the antenna panel subassembly has first surface and the second surface relative with the first surface, and dielectric filter still includes the casing, and the casing is including having the first shell body that holds the chamber and forming a plurality of connecting pieces on the shell body, and the dielectric cavity sets up in the first intracavity that holds of shell body, and the first surface of antenna panel subassembly is towards the dielectric cavity, is formed with a plurality of connecting holes on the antenna panel subassembly, and every connecting hole corresponds at least one connecting piece, and the connecting hole runs through the antenna panel subassembly along the thickness direction of antenna panel subassembly, and the connecting piece includes connecting portion and buckle portion, and the one end of connecting portion links to each other with the shell body, and the other end of connecting portion links to each other with the buckle portion, and connecting portion pass corresponding connecting hole to contact with the second surface of antenna panel subassembly. The dielectric cavity does not fail due to expansion stresses.

Description

Dielectric filter

Technical Field

The invention relates to the field of communication equipment, in particular to a dielectric filter.

Background

With the development of communication technology, the competitiveness of communication equipment is mainly embodied in terms of small volume, light weight and low cost. Dielectric filters have also evolved to take ceramic dielectric filters as a primary form as an important component of antenna feed systems.

Shown in fig. 1 is a dielectric filter, which includes a dielectric cavity 110, a metal pin 120, a filter liner 130, and an antenna plate 140, wherein the dielectric cavity 110 is made of a ceramic material, an outer surface of the dielectric cavity 110 is metallized, and the metal pin 120 realizes electromagnetic signal conduction between the antenna plate 140 and the dielectric cavity 110. The dielectric cavity 110 is integrally welded on the antenna liner 130, the antenna liner 130 and the antenna plate 140 are pasted by soldering tin, and the metal pin 120 is welded with the microstrip line on the antenna plate 140 to realize signal conduction.

However, in the process of using the dielectric filter shown in fig. 1, there occurs a problem that the dielectric filter is damaged, resulting in a failure of product performance.

Disclosure of Invention

The invention provides a dielectric filter, which comprises a dielectric cavity and an antenna board assembly, wherein the outer surface of the dielectric cavity is a conductive surface, the antenna board assembly is provided with a first surface and a second surface opposite to the first surface, the dielectric filter further comprises a shell, the shell comprises a shell body with a first accommodating cavity and a plurality of connecting pieces formed on the shell body, the dielectric cavity is arranged in the first accommodating cavity of the shell body, the first surface of the antenna board assembly faces the dielectric cavity, a plurality of connecting holes are formed on the antenna board assembly, each connecting hole corresponds to at least one connecting piece, the connecting hole penetrates through the antenna board assembly along the thickness direction of the antenna board assembly, the connecting piece comprises a connecting part and a buckling part, one end of the connecting part is connected with the shell body, the other end of the connecting part is connected with the buckling part, and the connecting part penetrates through the corresponding connecting hole and is in contact with the second surface of the antenna board assembly.

Optionally, the dielectric filter further includes a plurality of conductive pins, where each conductive pin includes a conductive cap, an elastic element, and a conductive pillar, a second accommodating cavity is formed in the conductive cap, the elastic element is disposed in the second accommodating cavity, one end of the conductive pillar is connected to the elastic element, the other end of the conductive pillar is electrically connected to the antenna board assembly, and the conductive pillar is electrically connected to the conductive cap;

the input port and the output port of the dielectric cavity are both provided with the conductive pins, the conductive caps are electrically connected with the conductive surfaces, and the conductive columns are electrically connected with the signal strip lines of the antenna board assembly.

Optionally, the dielectric filter further includes a plurality of shielding conductive members, each of the conductive pins corresponds to the shielding conductive member, the shielding conductive members are disposed on the periphery of the corresponding conductive pin, the shielding conductive members are disposed between the first surface of the antenna board assembly and the dielectric cavity, so as to electrically connect the conductive surface of the dielectric cavity to the ground area of the antenna board assembly, and the shielding conductive members are spaced apart from the signal strip lines on the antenna board assembly in an insulating manner.

Optionally, the shielding conductive member has elasticity.

Optionally, the shielding conductive member is made of conductive adhesive; or the shielding conductive member is made of an elastic metal sheet.

Optionally, the housing includes a housing bottom plate and a housing side wall, the housing side wall is disposed around the housing bottom plate to enclose the first accommodating cavity, the connecting portion is formed on a surface of the housing side wall facing away from the housing bottom plate, and the housing bottom plate is opposite to the bottom surface of the medium cavity.

Optionally, the housing further comprises a positioning column disposed on a surface of the housing sidewall facing away from the housing bottom plate,

the antenna board assembly further comprises a positioning hole corresponding to the positioning column, and the positioning column is inserted into the positioning hole.

Optionally, the housing side wall includes a side wall body and a rib formed on an inner surface of the side wall body, and the rib is attached to a side surface of the medium cavity.

Optionally, at least one notched groove pair is further disposed on the side wall of the housing, at least one of the connectors corresponds to the notched groove pair,

the pair of notch grooves includes two notch grooves, one of which is located at one side of the corresponding connector and the other of which is located at the other side of the corresponding connector.

Optionally, the antenna plate assembly includes an antenna plate and an antenna reflection plate, which are stacked, and the antenna plate is disposed toward the dielectric cavity.

In the dielectric filter provided by the present disclosure, the dielectric cavity is connected to the antenna board assembly through the connecting member disposed on the housing, and the dielectric cavity is not connected to the antenna board assembly by welding. When the dielectric filter assembly is used in an environment temperature varying between-40 ℃ and 120 ℃, even if the expansion coefficients of the dielectric cavity and the antenna board assembly 300 are different, expansion stress cannot be formed between the dielectric cavity and the antenna board assembly, the dielectric cavity or the antenna board assembly cannot be damaged, and signal conduction between the dielectric cavity and the antenna board assembly cannot be damaged.

Drawings

Fig. 1 is a schematic structural view of a dielectric filter in the related art;

figure 2 is a schematic main section view of a first embodiment of a dielectric filter provided by the present disclosure;

figure 3 is a schematic main cross-sectional view of a second embodiment of a dielectric filter provided by the present disclosure;

FIG. 4 is a schematic perspective view of one embodiment of a media chamber;

FIG. 5 is a schematic main cross-sectional view of one embodiment of a conductive pin;

FIG. 6 is a perspective view of one embodiment of a housing;

fig. 7 is a schematic perspective exploded view of a second embodiment of a dielectric filter provided by the present disclosure.

Description of the reference numerals

110: the dielectric cavity 120: metal needle

130: filter lining plate 140: antenna plate

200: the housing 210: shell body

211: housing bottom plate 212: side wall of the shell

211 a: weight-reduction holes 212 a: side wall body

212b, and (3 b): ribs 222: fastening part

220: the connecting member 221: connecting part

300: antenna board assembly 310: antenna plate

320: antenna reflection plate 300 a: connecting hole

310 a: first connection hole 320 a: second connecting hole

310 b: first positioning hole 320 b: second positioning hole

230: positioning column 400: conductive needle

410: the conductive cap 420: elastic piece

430: conductive post 500: shielding conductive piece

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present disclosure, the dielectric filter provided in the present disclosure is described in detail below with reference to the accompanying drawings.

Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but which may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For a dielectric filter, a dielectric cavity is usually made of a ceramic material, the temperature of the use environment of the dielectric filter changes from-40 ℃ to 120 ℃, the expansion coefficient of the ceramic material is relatively small (4-10 PPM), and the expansion coefficient of an antenna plate is relatively large (greater than 12PPM), so that a large expansion stress exists between the antenna plate and the dielectric cavity, and the dielectric filter made of the ceramic cracks or the soldering tin between an antenna lining plate and the antenna plate cracks, so that the dielectric filter fails.

In view of this, the present disclosure provides a dielectric filter, as shown in fig. 2 and 3, including a dielectric cavity 110 and an antenna board assembly 300. The outer surface of the dielectric cavity 110 is a conductive surface, and the antenna board assembly 300 has a first surface and a second surface opposite to the first surface. The dielectric filter further includes a case 200, the case 200 including a case body 210 having a first receiving cavity, in which the dielectric chamber 110 is disposed, and a plurality of connection pieces 220 formed on the case body 210. The first surface of the antenna board assembly 300 faces the dielectric cavity 110, and a plurality of connection holes 300a are formed on the antenna board assembly 300, each connection hole 300a corresponds to at least one connection member 220, and the connection hole 300a penetrates through the antenna board assembly 300 along the thickness direction of the antenna board assembly 300. The connection member 220 includes a connection portion 221 and a hooking portion 222, one end of the connection portion 221 is connected to the case body 210, the other end of the connection portion 221 is connected to the hooking portion 222, and the connection portion 221 passes through the corresponding connection hole 300a and contacts the second surface of the antenna board assembly 300.

It is noted that there is signal conduction between the dielectric cavity 110 and the antenna board assembly 300. In the dielectric filter provided by the present disclosure, the dielectric cavity 110 is connected to the antenna board assembly 300 through the connecting member 220 provided on the housing, and the dielectric cavity 110 is not connected to the antenna board assembly 300 by welding. When the dielectric filter assembly is used in an ambient temperature varying between-40 ℃ and 120 ℃, even if the expansion coefficients of the dielectric cavity 110 and the antenna board assembly 300 are different, expansion stress is not formed between the dielectric cavity 110 and the antenna board assembly 300, and the dielectric cavity 110 or the antenna board assembly is not damaged, and signal conduction between the dielectric cavity 110 and the antenna board assembly 300 is not damaged.

When the dielectric filter is assembled, the dielectric cavity 110 is only required to be disposed in the first accommodating cavity of the housing 200, and then the connecting member 220 is aligned to the corresponding connecting hole 300a to realize the clamping connection between the housing 200 and the antenna board assembly 300. Compared with the related art, the dielectric filter provided by the present disclosure is easier to assemble than the dielectric cavity 110 and the antenna board connected by soldering.

Because there is not the solder joint between the dielectric cavity 110 and the antenna plate assembly 300 in the use process, when the dielectric filter is maintained, the housing can be removed only by withdrawing the connecting piece 220 from the connecting hole 300a, so that the dielectric filter is disassembled, the solder joint does not need to be melted at high temperature, and the maintenance efficiency can be improved and the maintenance cost can be reduced.

For ease of installation, the material of the housing 200 should have elasticity, and likewise, for the function of a dielectric filter, the housing 200 should be insulative. Accordingly, the housing 200 may be made of plastic.

In the present disclosure, the specific structure of the dielectric chamber 110 is not particularly limited. As an alternative embodiment, the dielectric chamber 110 includes a ceramic body and a conductive layer disposed on an outer surface of the ceramic body, that is, the outer surface of the dielectric chamber 110 is a conductive surface. In the present disclosure, how to form the conductive layer on the outer surface of the ceramic body is not particularly limited, and for example, the outer surface of the ceramic body may be metallized by way of plating to obtain the conductive layer.

"at least one connecting member 220 per each connecting hole 300 a" includes the following two cases: in the first case, one connection hole 300 corresponds to one connection member 220; in the second case, one connecting hole 300 corresponds to a plurality of connecting members 220. In any case, the connection portion 221 of the connection member 220 passes through the connection hole 300a corresponding to the connection member, so as to fixedly connect the housing 200 and the antenna board assembly 300 by the clip portion 222, and finally, to connect the dielectric cavity 110 and the antenna board assembly 300.

In the present disclosure, it is necessary to achieve signal conduction between the dielectric cavity 110 and the antenna board assembly 300. Specifically, the input port and the output port of the dielectric cavity 110 need to be electrically connected to the signal strip line of the antenna board assembly.

It should be noted that the input port and the output port of the dielectric cavity 110 are blind holes formed on the dielectric cavity 110, and the surfaces of the input port and the output port are conductive surfaces.

Shown in fig. 5 is an embodiment of a media chamber 110, and as shown in the figure, the media chamber 110 has an input port 111 and an output port 112 formed thereon. In addition, a coupling tuning slot, a tuning frequency hole, and other structures are formed on the dielectric cavity 110.

In order to realize signal conduction between the input port and the output port of the dielectric cavity 110 and the antenna board, optionally, the dielectric filter further includes a plurality of conductive pins 400, as shown in fig. 4, each conductive pin 400 includes a conductive cap 410, an elastic member 420, and a conductive pillar 430, a second accommodating cavity is formed in the conductive cap 410, the elastic member 420 is disposed in the second accommodating cavity, one end of the conductive pillar 430 is connected to the elastic member 420, the other end of the conductive pillar 430 is electrically connected to the antenna board assembly, and the conductive pillar 430 is electrically connected to the conductive cap 410.

In the present disclosure, there is no particular limitation on how the electrical connection is formed between the conductive pillars 430 and the conductive caps 410. For example, the outer surfaces of the conductive posts 430 can contact the surfaces of the second receiving cavity to form an electrical connection between the conductive posts 430 and the conductive cap 410. In order to ensure that the conductive pillars 430 and the conductive caps 410 can be electrically connected, the elastic members 420 may be made of a conductive material, and one end of the elastic members 420 is fixedly connected to the conductive caps 410 and the other end is fixedly connected to the conductive pillars 430. Also, the elastic member 420 should be in a compressed state to ensure close contact between the conductive post 430 and the signal strip line. In the present disclosure, the outer surface of the conductive pin 400 may be plated with copper or silver to better achieve signal transmission.

The conductive pins 400 are disposed in the input port and the output port of the dielectric cavity 110, the conductive cap 410 is electrically connected to the conductive surface, and the conductive column 410 is electrically connected to the signal strip line on the antenna board assembly 300, so as to realize signal conduction between the input port and the output port of the dielectric cavity 110 and the signal strip line on the antenna board assembly 300.

In the present disclosure, the specific structure of the elastic member 420 is not particularly limited, and for example, the elastic member 420 may be a metal spring or a metal elastic sheet.

The signal conduction between the input port and the output port of the dielectric cavity 110 and the antenna board can be realized by arranging the conductive pin 400 with the elastic member 420, and a filter lining plate and welding are not needed, so that the antenna board assembly is further prevented from being out of work due to welding.

In the related art, the dielectric cavity of the finished dielectric filter and the antenna board assembly are welded together by the filter lining plate. When assembling the dielectric filter, it is necessary to debug the dielectric filter performance of the dielectric cavity in a state where the dielectric cavity and the antenna board assembly are not welded, so as to change the structure of the dielectric cavity. When the dielectric cavity achieves the required performance, the dielectric cavity meeting the performance and the antenna board assembly are welded together through the filter lining plate. This results in a difference between the debugging environment (the dielectric cavity is not welded to the antenna board assembly) for debugging the dielectric filter and the usage environment (the dielectric cavity is welded to the antenna board assembly via the filter lining board) of the dielectric filter. That is, a dielectric filter that satisfies the performance requirements of the debugging environment does not necessarily satisfy the actual usage environment of the dielectric filter.

In the dielectric filter provided by the present disclosure, since the conductive pin 400 has elasticity, when debugging the filter, signal conduction between the antenna board assembly 300 and the dielectric cavity 110 can be realized without welding, a debugging environment when debugging the filter is aligned with a use environment of an actually used filter, an index difference between a debugging index and a real use environment can be eliminated, and the dielectric filter meeting performance requirements in the debugging environment can also meet performance requirements in the use environment, so compared with the dielectric filter in the related art, the dielectric filter provided by the present disclosure has better performance.

In order to shield signals, the dielectric filter further includes a plurality of shielding conductive members 500 corresponding to each conductive pin 400, the shielding conductive members 500 are disposed at the periphery of the corresponding conductive pin 400, and the shielding conductive members 500 are disposed between the first surface of the antenna board assembly 300 and the dielectric cavity 110 to electrically connect the conductive surface of the dielectric cavity 110 with the ground region of the antenna board assembly 300, it is noted that the shielding conductive members 500 are spaced apart from the signal strip lines on the antenna board assembly 300 in an insulating manner.

In order to achieve close contact between the shielding conductive member 500 and the conductive surface of the dielectric cavity 110 and the grounding region of the antenna board assembly 300, optionally, the shielding conductive member 500 has elasticity and is in a compressed state.

For convenience of installation, as an alternative embodiment, the shielding conductive member 500 may be made of conductive paste. For example, the shielding conductive member 500 may be made of a conductive paste in a strip shape or a sheet shape. The conductive paste mainly includes a resin matrix and conductive particles dispersed in the resin matrix. The resin matrix mainly comprises epoxy resin, acrylate resin, polyvinyl chloride and the like. The conductive adhesive requires that the conductive particles have good conductive performance and have a particle size within a proper range, and can be added into a resin matrix to form a conductive path. The conductive particles may be made of any one of powders of gold, silver, copper, aluminum, zinc, iron, nickel, and graphite and some conductive compounds.

Of course, the present disclosure is not limited thereto, and the shielding conductive member 500 may also be made of a conductive elastic metal sheet.

In the present disclosure, specific structure of the housing 200 is not particularly limited, as shown in fig. 2, 3, and 6, the housing 200 includes a housing bottom plate 211 and a housing side wall 212, the housing side wall 212 is disposed around the housing bottom plate 211 to enclose the first receiving cavity, the connection portion 220 is formed on a surface of the housing side wall 212 facing away from the housing bottom plate 211, and the housing bottom plate 211 is disposed opposite to a bottom surface of the medium cavity 110.

As described above, the housing 200 may be made of plastic, and thus, the housing 200 may be formed through an injection molding process.

For convenience of installation, optionally, the housing further includes positioning pillars 230, the positioning pillars 230 are disposed on the surface of the side wall of the housing facing away from the housing bottom plate 211, and correspondingly, the antenna board assembly 300 further includes positioning holes corresponding to the positioning pillars 230, and the positioning pillars 230 are inserted into the corresponding positioning holes 230. When the housing 200, the dielectric chamber 110 and the antenna board assembly 300 are assembled, the positioning posts 230 are aligned with the corresponding positioning holes and then inserted to connect the housing and the antenna board assembly 300. In addition, the positioning column 230 can also play a role in auxiliary connection, so that the transverse external force applied to the connecting piece 220 in a vibration environment is reduced, and the opening part of the connecting piece 220 is prevented from being separated from the connecting hole.

In the embodiment shown in fig. 6, the housing 200 includes two positioning pillars 230, but the present disclosure is not limited thereto, and more positioning pillars 230 may be provided.

In order to improve the strength of the case 200 and facilitate the insertion of the media chamber 110 into the first receiving cavity of the case 200, the case sidewall 212 may optionally include a sidewall body 212a and a rib 212b formed on an inner surface of the sidewall body 212a, the rib 212b being attached to a side surface of the media chamber 110.

In the case 200, only the rib 212b is fitted to the side surface of the media chamber 110, and therefore, the contact area between the case 200 and the media chamber 100 is small, thereby facilitating the taking out of the media chamber 110 from the first receiving chamber. Also, the provision of the ribs 212b can also improve the strength of the housing 200.

To facilitate manufacturing of the housing 200, at least one of the housing sidewall 212 and the housing bottom plate 211 is optionally formed with at least one lightening hole.

For example, in the embodiment shown in fig. 6, the housing bottom plate 211 is formed with lightening holes 211a, and the housing side walls are also formed with lightening holes.

When the housing 200 is assembled with the antenna board assembly 300, a force is applied to the connection member 220, so that the connection member 220 is elastically deformed, so that the hooking portion 222 can pass through the connection hole 300a, and after the hooking portion 222 passes through the connection hole 300a, it can return to an original state and be hooked on the second surface of the antenna board assembly 300. In order to facilitate the elastic deformation of the connection member 220 for the assembly, optionally, the connection portion of the connection member 220 has a thickness smaller than that of the sidewall body 212 a.

As shown in fig. 6, the thickness of the connection portion 221 is approximately one-half of the thickness of the sidewall body 212 a.

In order to further increase the elastic deformation of the connection portion 221, optionally, at least one notched groove pair is further disposed on the housing sidewall 212, and at least one connection member 220 corresponds to the notched groove pair, and the notched groove pair includes two notched grooves, one of the notched grooves is located on one side of the corresponding connection member 220, and the other notched groove is located on the other side of the corresponding connection member.

After the notch groove is provided, the rigidity of the link 220 may be reduced so that the link 220 is elastically deformed.

In the embodiment shown in fig. 6, four connectors 220 are disposed on the housing 200, wherein two connectors 220 are correspondingly disposed with a pair of notched grooves, and the connectors 220 correspondingly disposed with a pair of notched grooves are disposed on the opposite side walls of the housing, so that the two are deformed simultaneously when the dielectric filter is assembled. In order to improve the strength of the housing 200, optionally, the other two housing sidewalls are not provided with a pair of notched grooves.

In the present disclosure, the antenna board assembly 300 is not particularly limited. As an alternative embodiment, the antenna board assembly 300 may be a single-layer structure, as shown in fig. 2, the connection hole 300a directly penetrates through the single-layer antenna board assembly, and the fastening portion 222 is fastened to the antenna board assembly.

As another alternative embodiment of the present disclosure, as shown in fig. 3, the antenna board assembly 300 may include an antenna board 310 and an antenna reflection board 320 which are stacked, and the antenna board 310 is disposed toward the dielectric cavity. The connection hole 300a penetrates the antenna board 310 and the antenna reflection board 320, and the opening 222 is engaged with the antenna reflection board 320.

Specifically, as shown in fig. 7, a first connection hole 310a is formed on the antenna plate 310, a second connection hole 320a is formed on the antenna reflection plate 320, and the first connection hole 310a and the second connection hole 320b are communicated to form a connection hole 300 a.

Accordingly, as shown in fig. 7, the positioning holes may also include a first positioning hole 310b penetrating the antenna board 310 and a second positioning hole 320b penetrating the antenna radiation board 320.

The dielectric filter may be assembled in the manner shown in fig. 7: the dielectric cavity 110 is clamped in the housing 200, the dielectric cavity 110 is clamped in a connecting hole of an antenna assembly comprising the antenna board 310 and the antenna reflection board 320 through a connecting part on the housing 200, the conductive pin 400 is in close contact with a signal strip line on the antenna board 310 to realize signal conduction, and the shielding conductive member 500 around the conductive pin 400 is in close contact with a grounding area on the antenna board 310 to realize grounding shielding.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purposes of limitation. In some instances, features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics and/or elements described in connection with other embodiments, unless expressly stated otherwise, as would be apparent to one skilled in the art. Accordingly, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the disclosure as set forth in the appended claims.

Claims (10)

1. A dielectric filter comprises a dielectric cavity and an antenna board assembly, wherein the outer surface of the dielectric cavity is a conductive surface, the antenna board assembly is provided with a first surface and a second surface opposite to the first surface, the dielectric filter is characterized by further comprising a shell, the shell comprises a shell body with a first accommodating cavity and a plurality of connecting pieces formed on the shell body, the dielectric cavity is arranged in the first accommodating cavity of the shell body, the first surface of the antenna board assembly faces the dielectric cavity, a plurality of connecting holes are formed in the antenna board assembly, each connecting hole corresponds to at least one connecting piece, the connecting holes penetrate through the antenna board assembly along the thickness direction of the antenna board assembly, each connecting piece comprises a connecting part and a buckling part, and one end of each connecting part is connected with the shell body, the other end of the connecting part is connected with the buckling part, and the connecting part penetrates through the corresponding connecting hole and is in contact with the second surface of the antenna board assembly.

2. The dielectric filter of claim 1, further comprising a plurality of conductive pins, wherein the conductive pins comprise a conductive cap, an elastic member, and a conductive pillar, a second receiving cavity is formed in the conductive cap, the elastic member is disposed in the second receiving cavity, one end of the conductive pillar is connected to the elastic member, the other end of the conductive pillar is electrically connected to the antenna board assembly, and the conductive pillar is electrically connected to the conductive cap;

the input port and the output port of the dielectric cavity are both provided with the conductive pins, the conductive caps are electrically connected with the conductive surfaces, and the conductive columns are electrically connected with the signal strip lines of the antenna board assembly.

3. The dielectric filter of claim 1, further comprising a plurality of shielding conductive members, each of the conductive pins corresponding to the shielding conductive member, the shielding conductive members being disposed around the corresponding conductive pin, the shielding conductive members being disposed between the first surface of the antenna board assembly and the dielectric cavity to electrically connect the conductive surface of the dielectric cavity to the ground region of the antenna board assembly, and the shielding conductive members being spaced apart from the signal strip lines on the antenna board assembly.

4. A dielectric filter as recited in claim 3, wherein said shielding conductive member is resilient.

5. A dielectric filter according to claim 4, characterized in that said shielding conductive member is made of conductive paste; or the shielding conductive member is made of an elastic metal sheet.

6. The dielectric filter according to any one of claims 1 to 5, wherein the housing includes a housing bottom plate and a housing side wall, the housing side wall is disposed around the housing bottom plate to enclose the first accommodation cavity, the connection portion is formed on a surface of the housing side wall facing away from the housing bottom plate, and the housing bottom plate is opposite to a bottom surface of the dielectric cavity.

7. The dielectric filter of claim 6, wherein the housing further comprises positioning posts disposed on a surface of the housing sidewall facing away from the housing floor,

the antenna board assembly further comprises a positioning hole corresponding to the positioning column, and the positioning column is inserted into the positioning hole.

8. The dielectric filter of claim 6, wherein the housing sidewall includes a sidewall body and a rib formed on an inner surface of the sidewall body, the rib abutting a side surface of the dielectric cavity.

9. The dielectric filter of claim 6, wherein the housing sidewall is further provided with at least one pair of notched grooves, at least one of the connectors corresponds to the pair of notched grooves,

the pair of notch grooves includes two notch grooves, one of which is located at one side of the corresponding connector and the other of which is located at the other side of the corresponding connector.

10. A dielectric filter according to any of claims 1 to 5, wherein the antenna board assembly comprises an antenna board and an antenna reflection board arranged in a stack, the antenna board being arranged towards the dielectric cavity.

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