Dielectric filter and communication equipment

Abstract

The utility model is suitable for the technical field of communication equipment, and provides a dielectric filter and communication equipment, and the dielectric filter comprises a housing, a dielectric resonance member, and a metal connecting block. A first wall and a second wall which are oppositely arranged are arranged in the shell, a metal bottom table is arranged on the second wall of the shell, the metal connecting block is connected to the end, away from the second wall, of the metal bottom table in a split mode, the first end of the dielectric resonance piece is connected with the first wall, and an installation groove is formed in the second end of the dielectric resonance piece. And at least part of the metal connecting block is inserted into the mounting groove. The contact area of the metal connecting block and the inner wall of the mounting groove is large, and the groove bottom wall and the groove side wall of the mounting groove limit the axial end face and the circumferential side face of the metal connecting block, so that the dielectric resonant piece is more stably fixed between the first wall and the metal bottom table.

Description

Technical Field

[0001] The utility model belongs to the technical field of communication equipment, and in particular relates to a dielectric filter and communication equipment. Background Art

[0002] The dielectric filter includes a housing, a dielectric resonant rod disposed in the housing, and a cover plate covering the housing. Figure 1 In the existing dielectric filter, a support platform 20 is usually set between the dielectric resonance rod 10 and the bottom wall of the shell, and a fixing member 30 is set between the support platform 20 and the dielectric resonance rod 10 for installing and fixing the dielectric resonance rod 10. However, this fixing method has insufficient structural stability, resulting in unstable performance of the dielectric filter. Utility Model Content

[0003] The utility model aims to provide a dielectric filter and a communication device, aiming to solve the technical problem of unstable fixing structure of dielectric resonant components in the existing dielectric filter.

[0004] The utility model is implemented as follows: in a first aspect, a dielectric filter is provided, comprising a shell, a dielectric resonator and a metal connecting block; the interior of the shell is provided with a first wall and a second wall arranged opposite to each other, a metal base is arranged on the second wall of the shell, the metal connecting block is separately connected to an end of the metal base away from the second wall, the first end of the dielectric resonator is connected to the first wall, the second end of the dielectric resonator is provided with a mounting groove, and at least a part of the metal connecting block is inserted into the mounting groove.

[0005] In some embodiments, in a radial direction perpendicular to a depth direction of the mounting groove, a peripheral edge of the metal connection block protrudes from a side wall of the metal base.

[0006] In some embodiments, the metal connection block is fixed to the inner wall of the mounting groove by an adhesive layer.

[0007] In some embodiments, the thickness of the adhesive layer is 0.02-0.2 mm.

[0008] In some embodiments, along the depth direction of the mounting groove, the height of the metal connection block is equal to or less than the height of the side wall of the mounting groove.

[0009] In some embodiments, a tuning hole is provided at the first end of the dielectric resonator, and the tuning hole is isolated from the mounting groove by a groove bottom of the mounting groove.

[0010] In some embodiments, a tuning hole is disposed at the first end of the dielectric resonator, and the tuning hole is communicated with the mounting groove.

[0011] In some embodiments, a sink groove is provided on a side of the metal connection block facing away from the metal base, and the aperture of the sink groove is smaller than or equal to the aperture of the tuning hole.

[0012] In some embodiments, the metal connection block is provided with a mounting through hole, the mounting through hole is connected to the tuning hole, the metal base is provided with a threaded hole, and the metal connection block and the metal base are connected by fasteners passing through the mounting through hole and the threaded hole.

[0013] In a second aspect, a communication device is provided, comprising any one of the above-mentioned dielectric filters.

[0014] The dielectric filter provided by the embodiment of the utility model has the following effects:

[0015] The two opposite ends of the dielectric resonator contact the first wall and the metal connection block respectively. The metal connection block is stably supported by the metal base and connected to one end of the metal base, and is at least partially inserted into the installation groove. Since the metal connection block has a large contact area with the inner wall of the installation groove, and the groove bottom wall and groove side wall of the installation groove limit the axial end face and circumferential side face of the metal connection block, the dielectric resonator is more firmly fixed between the first wall and the metal base. The dielectric resonator rod of the prior art is assembled on the support platform through a fixing part, and the lower end face of the dielectric resonator rod is fixed in contact with the upper end face of the fixing part, with a small contact area, and cannot be fixed circumferentially, and has poor stability.

[0016] Furthermore, the metal connecting block and the metal base are connected separately, which is easy to install. During assembly, the metal connecting block can be first assembled into the installation groove so that the dielectric resonator and the metal connecting block form a whole, and then the whole composed of the dielectric resonator and the metal connecting block is connected to the metal base.

[0017] Furthermore, different metal connecting blocks can be replaced according to different filter indicators to adapt to different models of filter products.

[0018] Furthermore, in the prior art, the support platform is used to accommodate the fixings, which results in a relatively small relative area between the end of the support platform and the first wall. Since the metal connection block of the present application is a block structure, the relative area between the metal connection block and the first wall is relatively large, which is conducive to increasing the capacitance between the two and reducing the frequency, thereby reducing the frequency under the condition of unchanged volume, and reducing the volume under the condition of unchanged frequency, which is conducive to the miniaturization of the filter. In addition, the circumferential side of the metal connection block is wrapped by a dielectric resonator, which increases the dielectric constant between the circumferential side of the metal connection block and the side wall of the shell, that is, the capacitance is increased, and the frequency can also be reduced, which is conducive to the miniaturization of the filter.

[0019] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a partial structural schematic diagram of a dielectric filter in the prior art; wherein, it includes a dielectric resonance rod, a support platform, and a fixing member;

[0022] Figure 2 It is a schematic cross-sectional structural diagram of a dielectric filter provided by an embodiment of the utility model;

[0023] Figure 3 It is a schematic cross-sectional structural diagram of a dielectric resonator in a dielectric filter provided by an embodiment of the utility model;

[0024] Figure 4 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Description of reference numerals:

[0026] 10. dielectric resonant rod; 20. support platform; 30. fixing member;

[0027] 1. Shell; 11. First wall; 12. Second wall; 13. Metal base; 2. Dielectric resonator; 21. Mounting groove; 211. First notch; 212. Second notch; 213. Slot bottom wall; 214. Slot side wall; 22. Tuning hole; 3. Metal connecting block; 31. Mounting via; 32. Countersunk groove; 4. Tuning component; 5. Fastener. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] Please refer to Figure 2 and Figure 3 As shown, in an embodiment of the utility model, a dielectric filter is provided, the dielectric filter comprising a housing 1, a dielectric resonator 2 and a metal connecting block 3; the interior of the housing 1 comprises a first wall 11 and a second wall 12 arranged opposite to each other, a metal base 13 is arranged on the second wall 12 of the housing 1, the metal connecting block 3 is separately connected to an end of the metal base 13 away from the second wall 12, the first end of the dielectric resonator 2 is in contact with the first wall 11, and a mounting groove 21 is arranged on the second end of the dielectric resonator 2, and at least a part of the metal connecting block 3 is inserted into the mounting groove 21.

[0034] The shell 1 refers to a component with a certain internal space, wherein the first wall 11 and the second wall 12 refer to two inner walls arranged opposite to each other in the shell 1 , for example, the first wall 11 and the second wall 12 can be the inner bottom surface and the inner top surface of the shell 1 respectively.

[0035] The second end of the dielectric resonator 2 is provided with a mounting groove 21, which refers to a groove structure with a certain depth recessed toward the first end of the dielectric resonator 2 on the end surface of the dielectric resonator 2 facing the metal base 13, and the groove structure has a first notch 211 facing the metal base 13. It is not excluded that the mounting groove 21 can also be opened toward the direction of the first wall, that is, the second notch 212. The inner wall of the mounting groove 21 includes a groove bottom wall 213 and a groove side wall 214. Optionally, the groove bottom wall 213 is an annular plane, and the groove side wall 214 is a cylindrical surface.

[0036] The metal connecting block 3 is separately connected to the end of the metal base 13 away from the second wall 12, which means that the metal connecting block 3 and the metal base 13 are not an integral structure. The two are manufactured independently and then assembled. The assembly method can be fastener connection, threaded connection, clamping, plug-in, crimping, welding, bonding and the like.

[0037] At least part of the metal connection block 3 is inserted into the installation groove 21, which means that the entire metal connection block 3 is hidden in the installation groove 21. Figure 2 As shown, each part of the metal connection block 3 does not protrude from the first notch 211, and when it is provided with a second notch 212, it does not protrude from the second notch 212. Alternatively, it also means that a part of the metal connection block 3 is hidden in the installation groove 21, a part protrudes from the notch 211, or another part protrudes from the second notch 212.

[0038] It can be understood that the shape of the part of the metal connecting block 3 inserted into the mounting groove 21 is adapted to the shape of the mounting groove 21, so that the part of the metal connecting block 3 inserted into the mounting groove 21 can be completely fitted with the inner wall of the mounting groove 21 to fully utilize the internal space and contact area of ​​the mounting groove 21.

[0039] The dielectric filter provided by the embodiment of the utility model has the following effects:

[0040] First, the two opposite ends of the dielectric resonator 2 contact the first wall 11 and the metal connection block 3 respectively. The metal connection block 3 is stably supported by the metal base 13 and connected to one end of the metal base 13, and is at least partially inserted into the mounting groove 21. Since the metal connection block 3 has a large contact area with the inner wall of the mounting groove 21, and the groove bottom wall 213 and the groove side wall 214 of the mounting groove 21 limit the axial end face and circumferential side face of the metal connection block 3, the dielectric resonator 2 is more firmly fixed between the first wall 11 and the metal base 13. Figure 1 In the prior art shown, the dielectric resonance rod 10 is assembled to the support platform 20 through the fixing member 30, and the lower end surface of the dielectric resonance rod 10 is fixed in contact with the upper end surface of the fixing member 30, the contact area is small, and circumferential fixation is impossible, resulting in poor stability.

[0041] Second, the metal connection block 3 and the metal base 13 are connected separately, which has a simple structure and is easy to install. During assembly, the metal connection block 2 can be first assembled into the installation groove 21, so that the dielectric resonator 2 and the metal connection block 3 form a whole, and then the whole formed by the dielectric resonator 2 and the metal connection block 3 is connected to the metal base 13. Figure 1 Compared with the connection method between the dielectric resonance rod 10 and the support platform 20 shown, there is no need to set a groove on the support platform 20 for installing and accommodating the fixing member 30, nor is there a protruding structure on the fixing member 30 to adapt to the resonance hole of the dielectric resonance rod 10. The dielectric resonance member 2 and the metal connecting block 3 are connected to the metal base 13 as a whole. Compared with first installing the fixing member 30 on the support platform 20 and then aligning the resonance hole of the dielectric resonance rod 10 with the protruding structure of the fixing member 30, it is easier to operate.

[0042] Third, different metal connection blocks 3 can be replaced according to different filter indicators. For example, metal connection blocks 3 of different sizes can be replaced to adapt to filter products of different models.

[0043] Fourth, in the prior art, in order to accommodate the fixing member 30, the support platform 20 has a relatively small area between the end of the support platform 20 and the inner wall of the cover plate. Since the metal connection block 3 of the present application is a block structure, the relative area between the metal connection block 3 and the first wall 11 is large, which is conducive to increasing the capacitance between the two and reducing the frequency, thereby reducing the frequency under the condition of unchanged volume, and reducing the volume under the condition of unchanged frequency, which is conducive to the miniaturization of the filter. In addition, the circumferential side of the metal connection block 3 is wrapped by the dielectric resonator 2, so that the dielectric constant between the circumferential side of the metal connection block 3 and the side wall of the housing 1 is increased, that is, the capacitance is increased, and the frequency can also be reduced, which is conducive to the miniaturization of the filter.

[0044] In some embodiments, Figure 2 As shown, the metal connecting block 3 is coaxially arranged with the metal base 13, and the metal base 13 is coaxially arranged with the dielectric resonator 2, which is convenient for installation. At the same time, all three can be arranged in the central area of ​​the corresponding resonant cavity, which makes it easier to achieve the required indicators and facilitates tuning.

[0045] In one embodiment, Figure 2 and Figure 4As shown, in the radial direction Y perpendicular to the depth direction X of the mounting groove 21 (which is also the axial direction of the mounting groove), the peripheral edge of the metal connection block 3 protrudes from the side wall of the metal base 13. In other words, the radial dimension of the metal connection block 3 is larger than the radial dimension of the metal base 13. In this way, the radial dimension of the metal connection block 3 can be set as large as possible while ensuring the stable support of the metal connection block 3 and the metal base 13, so as to increase the contact area between the metal connection block 3 and the dielectric resonator 2, improve the stability of the dielectric resonator 2, and form a larger capacitance between the metal connection block 3 and the first wall 11. And, as Figure 1 As shown, the prior art needs to increase the outer diameter of the end of the support platform 20 to form a cylindrical metal resonance rod. In order to achieve the frequency index, the cylindrical metal resonance rod needs to be made larger in size, which occupies a large space. However, in this embodiment, the metal connecting block 3 can play the role of the metal resonance rod. It does not need to be made into a larger cylindrical shape as in the prior art to meet the frequency index required by the filter. It occupies less space and is conducive to the miniaturization of the filter.

[0046] In one embodiment, Figure 2 and Figure 4 As shown, along the depth direction X of the mounting groove 21, the height of the metal connection block 3 is equal to or less than the height of the groove side wall 214 of the mounting groove 21. That is, the circumferential side of the metal connection block 3 is completely wrapped by the groove side wall 214 of the mounting groove 21. On the one hand, the contact area between the metal connection block 3 and the dielectric resonator 2 is maximized, and on the other hand, the dielectric constant between the circumferential side of the metal connection block 3 and the side wall of the housing 1 is made as high as possible, so as to reduce the frequency more significantly and reduce the volume of the filter.

[0047] refer to Figure 2 Optionally, the height of the metal connection block 3 is equal to the height of the groove side wall 214 of the installation groove 21, that is, the surface of the metal connection block 3 facing the metal base 13 is flush with the surface of the dielectric resonator 2 facing the metal base 13, and the bottom surface of the metal connection block 3 is flush with the first notch 211 of the installation groove 21. In this way, while reducing the frequency, the overall appearance of the metal connection block 3 and the dielectric resonator 2 is made more regular and beautiful.

[0048] In some embodiments, the metal connection block 3 is fixed to the inner wall of the mounting groove 21 by an adhesive layer (not shown in the figure). Specifically, the bottom wall 213 of the mounting groove 21 and the end face of the metal connection block 3 can be connected by an adhesive layer; the groove side wall 214 of the mounting groove 21 and the circumferential side of the metal connection block 3 can also be connected by an adhesive layer; or all the inner walls of the mounting groove 21 can be connected to the metal connection block 3 by an adhesive layer. During assembly, the metal connection block 3 can be first bonded to the mounting groove 21 to form a whole, and then the whole can be connected to the metal base 13; of course, the metal connection block 3 can also be first installed on the top surface of the metal base 13, and then the dielectric resonator 2 and the metal connection block 3 can be aligned and bonded together through the mounting groove 21 and the metal connection block 3.

[0049] The adhesive connection can make it more convenient and quick to fix the metal connecting block 3 in the installation groove 21. In addition, the adhesive layer can play a buffering role when the temperature changes, thereby reducing to a certain extent the risk of loosening of the metal connecting block 3 or cracking and damage of the dielectric resonator 2 due to inconsistent expansion coefficients of the metal connecting block 3 and the dielectric resonator 2, thereby improving the safety of the equipment.

[0050] The thickness of the adhesive layer can be selected to be 0.02-0.2 mm, and preferably, the thickness of the adhesive layer is uniform everywhere, so as to ensure stable bonding between the metal connecting block 3 and the inner wall of the installation groove 21, and to control the amount of adhesive material as much as possible to save costs.

[0051] In one embodiment, Figure 3 As shown, the first wall 11 is movably connected with a tuning member 4, and the first end of the dielectric resonator 2 is provided with a tuning hole 22, which is used to accommodate the tuning member 4, and at least a portion of the tuning member 4 is located in the tuning hole 22. Specifically, the movability of the tuning member 4 can be achieved by threading the tuning member 4 with the first wall 11, and at this time, the length of the tuning member 4 extending into the tuning hole 22 can be adjusted by rotating the tuning member 4, and finally the overall resonant frequency of the filter can be adjusted, making the tuning operation of the filter more convenient.

[0052] In some embodiments, the tuning hole 22 and the mounting groove are isolated from each other by the bottom of the mounting groove 21, that is, the two are not connected. By isolating the tuning hole 22 and the mounting groove 21, the tuning component 4 and the metal connection block 3 are insulated, thereby preventing the tuning component 4 and the metal connection block 3 from short-circuiting, and avoiding the phenomenon of high-power sparking caused by the tuning component 4 and the metal connection block 3 being too close. During the assembly process, the metal connection block 3 and the metal base 13 can be connected as a whole first, and then the dielectric resonator 2 can be installed on the metal connection block 3 by bonding, welding, clamping, plugging, etc. The metal connection block 3 can also be installed in the mounting groove 21 first, and then the dielectric resonator 2 and the metal connection block 3 as a whole can be connected to the metal base 13 by bonding, welding, clamping, plugging, etc.

[0053] In one embodiment, Figure 3 As shown, the tuning hole 22 is connected with the mounting groove 21. The tuning hole 22 is connected with the mounting groove 21, which means that the side of the mounting groove 21 close to the first wall 11 is an open structure, that is, the second notch 212 is provided, and the second notch 212 is connected with the tuning hole 22, and the tuning hole 22 and the mounting groove 21 are in a through state, so that it is convenient to enter the tool from the end of the tuning hole 22 away from the mounting groove 21 to perform corresponding operations, such as but not limited to operating the fastener by the tool to lock the metal connecting block 3 and the metal base 13 or separate the two.

[0054] In some embodiments, please refer to Figure 2 and Figure 4 The metal connection block 3 is connected to the metal base 13 through the fastener 5. The metal connection block 3 is provided with a mounting hole 31 for the fastener 5 to pass through. The mounting hole 31 is connected to the tuning hole 22. The metal base 13 is provided with a threaded hole that matches the fastener 5. Specifically, the tool enters and screws the fastener 5 at one end of the tuning hole 22 facing the first wall 11, so that it passes through the mounting hole 41 and is locked with the threaded hole on the metal base 13, and the metal connection block 3 is pressed and fixed on the top surface of the metal base 13, and the dielectric resonator 2 and the metal base 13 are fixed.

[0055] The connection method in which the fastener 5 passes through the installation hole 41 and is locked with the threaded hole is simple to operate, reliable in connection, and convenient for disassembly and maintenance.

[0056] In some embodiments, please refer to Figure 4 A sink groove 32 is provided on the side of the metal connection block 3 facing away from the metal base 13. Optionally, the mounting hole 31 is provided at the bottom of the sink groove 32, and the head of the fastener 5 is located in the sink groove 32 and pressed against the inner bottom surface of the sink groove 32, so as to avoid occupying the space inside the tuning hole 22. In addition, by providing the sink groove 32, the weight of the metal connection block 3 can be reduced accordingly, which is conducive to the lightweight of the filter.

[0057] In some embodiments, please refer to Figure 4 , the aperture d1 of the sink 32 is less than or equal to the aperture d2 of the tuning hole 22. Among them, the aperture of the sink 32 refers to the inner diameter of the side wall of the sink 32. Similarly, the aperture of the tuning hole 22 refers to the inner diameter of the side wall of the tuning hole 22. It can be understood that the side wall of the sink 32 and the side wall of the tuning hole 22 can be, but not limited to, cylindrical side walls, and can also be elliptical cylinders, prisms, or even irregular surfaces. When the aperture d1 of the sink 32 is less than or equal to the aperture d2 of the tuning hole 22, the side wall of the sink 32 protrudes inward relative to the side wall of the tuning hole 22, that is, the bottom surface 213 of the mounting groove 21 can be completely covered by the end surface of the metal connecting block 3 facing the first wall 11. In this way, the bottom surface 213 of the mounting groove 21 is fully utilized, the contact area with the metal connecting block 3 is maximized, and the fixing effect of the dielectric resonator 2 is better.

[0058] In one embodiment, Figure 2 As shown, the metal base 13 and the housing 1 are an integrated structure. Specifically, the metal base 13 and the housing 1 can be integrally formed by machining; the metal base 13 and the housing 1 can also be integrally formed by die casting or casting. By setting the metal base 13 and the housing 1 as an integrated structure, the connection between the metal base 13 and the housing 1 can be made more secure.

[0059] In a second aspect, a communication device is provided, comprising any one of the above-mentioned dielectric filters.

[0060] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0061] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A dielectric filter, characterized in that: It includes a shell, a dielectric resonator and a metal connecting block; the interior of the shell has a first wall and a second wall arranged opposite to each other, the second wall of the shell is provided with a metal base, the metal connecting block is separately connected to an end of the metal base away from the second wall, the first end of the dielectric resonator is connected to the first wall, the second end of the dielectric resonator is provided with a mounting groove, and at least part of the metal connecting block is inserted into the mounting groove.

2. The dielectric filter according to claim 1, characterized in that In a radial direction perpendicular to the depth direction of the mounting groove, the periphery of the metal connection block protrudes from the side wall of the metal base.

3. The dielectric filter according to claim 1, wherein The metal connection block is fixed to the inner wall of the installation groove via an adhesive layer.

4. The dielectric filter according to claim 3, characterized in that The thickness of the adhesive layer is 0.02-0.2 mm.

5. The dielectric filter according to claim 1, wherein: Along the depth direction of the mounting groove, the height of the metal connection block is equal to or less than the height of the side wall of the mounting groove.

6. The dielectric filter according to claim 1, wherein: The first end of the dielectric resonator is provided with a tuning hole, and the tuning hole is isolated from the mounting groove by the groove bottom of the mounting groove.

7. The dielectric filter according to claim 1, wherein: The first end of the dielectric resonator is provided with a tuning hole, and the tuning hole is communicated with the mounting groove.

8. The dielectric filter according to claim 7, characterized in that A sink groove is provided on a side of the metal connection block facing away from the metal base, and the aperture of the sink groove is smaller than or equal to the aperture of the tuning hole.

9. The dielectric filter according to claim 7 or 8, characterized in that: The metal connection block is provided with a mounting through hole, the mounting through hole is communicated with the tuning hole, the metal base is provided with a threaded hole, and the metal connection block is connected to the metal base through fasteners penetrating the mounting through hole and the threaded hole.

10. A communication device, characterized in that: Comprising the dielectric filter according to any one of claims 1 to 9.

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