Filter and communication device

Abstract

The utility model relates to the technical field of communication, and provides a filter and a communication device.The filter comprises a cavity, a metal sheet, a first insulating part, a second insulating part and a metal fastener, a fixing hole is formed in the cavity, and the first insulating part and the second insulating part are located on the two sides of the metal sheet in the thickness direction of the metal sheet respectively; the metal fastener comprises a head part and a rod body connected with the head part, the rod body sequentially penetrates through the first insulating part, the metal sheet and the second insulating part and is inserted into the fixing hole, and a limiting part for limiting the depth of the rod body inserted into the fixing hole is arranged on the rod body. According to the filter, the limiting part is arranged on the rod body of the metal fastener, and when the rod body sequentially penetrates through the first insulating part, the metal sheet and the second insulating part and is inserted into the fixing hole, the depth of the rod body inserted into the fixing hole is limited by the limiting part, so that the metal fastener fixes the metal sheet in the cavity, and meanwhile, the metal sheet is fixed in the cavity through the limiting part. And the compression deformation of the first insulating part and the second insulating part can be determined, so that the mounting consistency of the metal sheet is ensured.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a filter and a communication device. Background Art

[0002] The metal sheet in the filter is usually fixed in the cavity by metal fasteners, and the metal fasteners are required to be insulated from the metal sheet, that is, they cannot be in direct contact. A common practice is to set a through hole on the metal sheet, and set a first insulating member and a second insulating member on both sides of the metal sheet in the thickness direction, respectively, and at least one of the two insulating members is provided with a convex portion inserted into the through hole; the metal fastener passes through the first insulating member, the metal sheet and the second insulating member and is connected to the cavity to achieve the insulation purpose of the metal fastener not being in contact with the metal sheet.

[0003] When the metal fasteners are used to fix the metal sheets, the amount of compression deformation of the insulating member cannot be determined, thus affecting the consistency of the installation of the metal sheets. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a filter and a communication device to solve the problem that the amount of compression deformation of the insulating component cannot be determined.

[0005] An embodiment of the first aspect of the present application proposes a filter, comprising a cavity, a metal sheet, a first insulating member, a second insulating member and a metal fastener, wherein a fixing hole is provided in the cavity, and the first insulating member and the second insulating member are respectively located on both sides of the metal sheet in the thickness direction thereof; the metal fastener comprises a head and a rod body connected to the head, the rod body sequentially passes through the first insulating member, the metal sheet and the second insulating member and is inserted into the fixing hole, and a limiting portion is provided on the rod body, and the limiting portion is used to limit the depth of the rod body inserted into the fixing hole.

[0006] The filter provided in the embodiment of the present application is provided with a limiting portion on the rod body of the metal fastener. When the rod body of the metal fastener passes through the first insulating member, the metal sheet and the second insulating member in sequence and is inserted into the fixing hole, the depth of the rod body inserted into the fixing hole is limited by the limiting portion, so that when the metal fastener fixes the metal sheet in the cavity, the compression deformation of the first insulating member and the second insulating member can be determined, thereby ensuring the consistency of the installation of the metal sheet.

[0007] In some embodiments, the rod body includes a first rod segment and a second rod segment connected to the first rod segment, the cross-section of the first rod segment is larger than the cross-section of the second rod segment, and an annular step is formed at the connection between the first rod segment and the second rod segment, and the annular step constitutes the limiting portion.

[0008] In some embodiments, an internal thread is provided in the fixing hole, and an external thread matching the internal thread is provided on the outer peripheral surface of the second rod segment.

[0009] In some embodiments, the limiting portion includes a plurality of protrusions disposed on the outer peripheral wall of the rod body, and the plurality of protrusions are spaced apart along the circumference of the rod body.

[0010] In some embodiments, the limiting portion is a limiting ring disposed on the outer peripheral wall of the rod body.

[0011] In some embodiments, the metal sheet is provided with a through hole extending through the metal sheet in the thickness direction thereof, and a limiting protrusion is provided on the side of the first insulating member facing the second insulating member and / or on the side of the second insulating member facing the first insulating member, and the limiting protrusion cooperates with the through hole in the radial upper limit position of the through hole.

[0012] In some embodiments, a fixing protrusion is provided on the inner wall surface of the cavity, and the fixing hole is opened in the fixing protrusion.

[0013] In some embodiments, the filter further includes a resonant component disposed in the cavity, and the fixing protrusion is arranged corresponding to the resonant component; and an end portion of the metal sheet is fixed on the fixing protrusion.

[0014] In some embodiments, the number of the resonant components is at least three, and the at least three resonant components include a first resonant component, a second resonant component, and a third resonant component that are coupled in sequence, and the first resonant component, the second resonant component, and the third resonant component are arranged in a straight line; the first resonant component and the third resonant component are respectively provided with the fixing protrusions, and the two ends of the metal sheet are respectively fixed on the two fixing protrusions to make the first resonant component and the third resonant component cross-coupled.

[0015] A second aspect of the present application provides a communication device, which includes the filter as described in the first aspect.

[0016] The communication device adopts all the embodiments of the above-mentioned filters, and thus has all the beneficial effects of the above-mentioned embodiments, which will not be described one by one here.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 is a schematic diagram of the structure of filters provided in some embodiments of the present application;

[0020] Figure 2 yes Figure 1 A cross-sectional view of the filter taken along the AA axis;

[0021] Figure 3 yes Figure 2 The enlarged view of point B in the middle;

[0022] Figure 4 is a schematic diagram of the structure of the cavity provided in some embodiments of the present application;

[0023] Figure 5 It is an exploded view of a metal fastener, a first insulating member, a metal sheet and a second insulating member provided in some embodiments of the present application.

[0024] The meanings of the marks in the figure are:

[0025] 10. Filter;

[0026] 11. Cavity;

[0027] 12. Metal sheet; 121. Through hole;

[0028] 13. a first insulating member; 131. a first through hole;

[0029] 14. a second insulating member; 141. a second through hole;

[0030] 15. Metal fastener; 151. Head; 152. Rod body; 1521. First rod section; 1522. Second rod section; 1523. Position limiting portion; 1524. External thread;

[0031] 16, fixing protrusion; 161, fixing hole; 1611, internal thread;

[0032] 17. Limiting convex part;

[0033] 18, resonant element; 18a, first resonant element; 18b, second resonant element; 18c, third resonant element; 181, mounting column; 181a, first mounting column; 181b, second mounting column; 181c, third mounting column;

[0034] 19. Connecting ribs. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0041] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0042] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" 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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] The first embodiment of the present application provides a filter. Figure 2 and Figure 3 The filter 10 includes a cavity 11, a metal sheet 12, a first insulating member 13, a second insulating member 14 and a metal fastener 15. A fixing hole 161 is provided in the cavity 11, and the first insulating member 13 and the second insulating member 14 are respectively located on both sides of the metal sheet 12 in the thickness direction thereof; the metal fastener 15 includes a head 151 and a rod 152 connected to the head 151, the rod 152 passes through the first insulating member 13, the metal sheet 12 and the second insulating member 14 in sequence and is inserted into the fixing hole 161, and a limiting portion 1523 is provided on the rod 152, and the limiting portion 1523 is used to limit the depth of the rod 152 inserted into the fixing hole 161.

[0044] The cavity 11 is provided with a fixing hole 161. It can be understood that the fixing hole 161 can be provided on the bottom wall of the cavity 11, in which case the metal sheet 12 is parallel or approximately parallel to the bottom wall of the cavity 11; or the fixing hole 161 can also be provided on the side wall of the cavity 11, in which case the metal sheet 12 is perpendicular or approximately perpendicular to the bottom wall of the cavity 11. The number of the fixing holes 161 is not limited, for example, the number of the fixing holes 161 can be one, two, or three or more.

[0045] It can be understood that the shape of the metal sheet 12 can be a regular sheet or an irregular sheet. The extension path of the metal sheet 12 can be a straight line extension, or a fold line extension, a bent extension or a curved extension. The metal sheet 12 can be a flying rod sheet to achieve cross coupling between the two resonators 18 in the cavity 11; the metal sheet 12 can also be used as a coupling sheet to achieve coupling connection between two adjacent resonators 18 in the cavity 11; the metal sheet 12 can also be a tap sheet to achieve signal transmission between the input or output end of the filter 10 and the resonator 18; the metal sheet 12 can also be used as a low-pass sheet to play a low-pass role; the metal sheet 12 can also be a sheet-shaped resonant rod to play the role of a resonator; the metal sheet 12 can also be a connecting sheet to play a role in signal transmission between two filter elements in the cavity 11.

[0046] The first insulating member 13 and the second insulating member 14 are respectively located on both sides of the metal sheet 12 in the thickness direction of the metal sheet 12. It can be understood that the first insulating member 13 and the second insulating member 14 separate the metal sheet 12 from the metal fastener 15 and the cavity 11 to prevent the metal sheet 12 from being electrically connected to the metal fastener 15 and the cavity 11. The thickness direction of the metal sheet 12 is the axial direction of the metal fastener 15.

[0047] The shapes of the corresponding positions of the metal sheet 12 and the first insulating member 13 and the second insulating member 14 may be ring-shaped, C-shaped, U-shaped, etc., so that the metal fastener 15 can pass through.

[0048] The shape of the first insulating member 13 and / or the second insulating member 14 is not limited, for example, the first insulating member 13 and / or the second insulating member 14 may be an insulating plate, an insulating block, etc. The first insulating member 13 and / or the second insulating member 14 may be a plastic member, for example, PTFE (Polytetrafluoroethylene); the first insulating member 13 and / or the second insulating member 14 may also be a rubber member.

[0049] It can be understood that the first insulating member 13 and / or the second insulating member 14 may be in a ring shape, a C shape, a U shape, etc., so as to allow the metal fastener 15 to pass through. When the first insulating member 13 and / or the second insulating member 14 is in a ring shape, the first insulating member 13 and / or the second insulating member 14 may be in a circular ring, a rectangular ring, etc.

[0050] The metal fastener 15 includes a head 151 and a rod 152, and the cross-sectional dimension of the rod 152 is smaller than the cross-sectional dimension of the head 151. The cross-sectional dimension of the head 151 refers to the cross-sectional dimension of the head 151 cut along the radial direction of the metal fastener 15, and the cross-sectional dimension of the rod 152 refers to the cross-sectional dimension of the rod 152 cut along the radial direction of the metal fastener 15.

[0051] When the rod body 152 passes through the first insulating member 13, the metal sheet 12 and the second insulating member 14 in sequence, the head 151 abuts against the side surface of the first insulating member 13 facing away from the second insulating member 14, and the side surface of the second insulating member 14 facing away from the first insulating member 13 abuts against the edge of the fixing hole 161; that is, the first insulating member 13 and the second insulating member 14 are in the annular space surrounded by the head 151, the rod body 152 and the edge of the fixing hole 161.

[0052] It is understandable that the number of the metal fasteners 15 can be one or more. When the number of the metal fasteners 15 is one, the metal fastener 15 can be passed through and fixed at the end or the middle of the metal sheet 12; when the number of the metal fasteners 15 is more than one, the metal sheet 12 is fixed by the multiple metal fasteners 15, and the position where each metal fastener 15 is passed through and fixed on the metal sheet 12 is not limited.

[0053] A limiting portion 1523 is provided on the rod body 152. When the rod body 152 is inserted into the fixing hole 161, the limiting portion 1523 can cooperate with the edge of the fixing hole 161 to limit the position. In this way, the size of the above-mentioned annular space in the axial direction of the metal fastener 15 can be guaranteed to be a constant value, that is, the compression deformation of the first insulating member 13 and the second insulating member 14 is a constant value, thereby ensuring the consistency of the installation of the metal sheet 12.

[0054] The filter 10 provided in the embodiment of the present application is provided with a limiting portion 1523 on the rod body 152 of the metal fastener 15. When the rod body 152 of the metal fastener 15 sequentially passes through the first insulating member 13, the metal sheet 12 and the second insulating member 14 and is inserted into the fixing hole 161, the depth of the rod body 152 inserted into the fixing hole 161 is limited by the limiting portion 1523, so that when the metal fastener 15 fixes the metal sheet 12 in the cavity 11, the compression deformation of the first insulating member 13 and the second insulating member 14 can be determined to ensure the consistency of the installation of the metal sheet 12, and then ensure the position accuracy and height accuracy of the metal sheet 12, thereby ensuring the stability and consistency of the indicators of the filter 10.

[0055] Please also refer to Figure 3 and Figure 5 In some embodiments, the rod body 152 includes a first rod segment 1521 and a second rod segment 1522 connected to the first rod segment 1521, the cross-section of the first rod segment 1521 is larger than the cross-section of the second rod segment 1522, and an annular step is formed at the connection between the first rod segment 1521 and the second rod segment 1522, and the annular step constitutes a limiting portion 1523.

[0056] The cross section of the first rod segment 1521 refers to the cross section of the first rod segment 1521 cut along the radial direction of the metal fastener 15 , and the cross section of the second rod segment 1522 refers to the cross section of the second rod segment 1522 cut along the radial direction of the metal fastener 15 .

[0057] Optionally, the head 151 , the first rod segment 1521 , and the second rod segment 1522 are connected in sequence, and the cross-sectional sizes of the head 151 , the first rod segment 1521 , and the second rod segment 1522 decrease in sequence.

[0058] Optionally, the first rod segment 1521 and the second rod segment 1522 may both be cylinders, which means that the diameter of the first rod segment 1521 is larger than the diameter of the second rod segment 1522. In this case, the annular step formed at the connection between the first rod segment 1521 and the second rod segment 1522 is a circular annular step. Of course, the first rod segment 1521 and the second rod segment 1522 may both be prisms. In this case, the annular step formed at the connection between the first rod segment 1521 and the second rod segment 1522 is a rectangular annular step.

[0059] Optionally, the head 151, the first rod segment 1521 and the second rod segment 1522 are integrally formed, so that the manufacturing cost and processing cost of the metal fastener 15 can be reduced, which is conducive to improving production efficiency and batch production, and can increase the structural strength of the metal fastener 15. For example, the first rod segment 1521 and the second rod segment 1522 with different cross sections can be turned from the cylindrical substrate by mechanical processing.

[0060] The rod body 152 provided in the embodiment of the present application includes a first rod segment 1521 and a second rod segment 1522. The annular step formed at the connection between the first rod segment 1521 and the second rod segment 1522 constitutes a limiting portion 1523, so that the area of ​​the limiting portion 1523 is larger, which is conducive to uniform force during limiting cooperation.

[0061] Please also refer to Figure 3 and Figure 5 In some embodiments, an internal thread 1611 is provided in the fixing hole 161 , and an external thread 1524 matching the internal thread 1611 is provided on the outer circumference of the second rod segment 1522 .

[0062] The depth of the fixing hole 161 is greater than the length of the second rod segment 1522 , so that when the second rod segment 1522 is inserted into the fixing hole 161 , it is ensured that the limiting portion 1523 can be matched with the edge of the fixing hole 161 .

[0063] Optionally, the metal fastener 15 is a metal fastening screw.

[0064] By setting an internal thread 1611 in the fixing hole 161 and setting an external thread 1524 on the outer peripheral surface of the second rod segment 1522, the rod body 152 can be rotated and inserted into the fixing hole 161, thereby fixing the metal sheet 12 in the cavity 11; moreover, this fixing method is simple and convenient, which is beneficial to the assembly efficiency of the filter 10.

[0065] In other embodiments, the internal thread 1611 may not be provided in the fixing hole 161 , the external thread 1524 may not be provided on the outer circumferential surface of the second rod segment 1522 , and the second rod segment 1522 is inserted into the fixing hole 161 in an interference fit manner.

[0066] In some embodiments, the limiting portion 1523 is a limiting ring disposed on the outer peripheral wall of the rod body 152 .

[0067] The material of the limiting ring can be metal or non-metal. When the material of the limiting ring is metal, the material of the limiting ring can be the same as the material of the rod body 152 or different from the material of the rod body 152.

[0068] It can be understood that the limiting ring can be integrally formed with the rod body 152; or, the limiting ring can be fixed to the rod body 152, for example, the limiting ring is fixed to the rod body 152 by welding, clamping, fastener connection, riveting, interference fit and other connection methods.

[0069] In some embodiments, the limiting portion 1523 includes a plurality of protrusions disposed on the outer peripheral wall of the rod body 152 , and the plurality of protrusions are distributed at intervals along the circumference of the rod body 152 .

[0070] Optionally, the number of the plurality of protrusions may be two or three or more.

[0071] Optionally, the shape of the protrusions may be block-shaped, dot-shaped, column-shaped, strip-shaped, etc.

[0072] It can be understood that the protrusion can be integrally formed with the rod body 152; or, the protrusion can be fixed to the rod body 152, for example, the protrusion is fixed to the rod body 152 by welding, clamping, fastener connection, riveting, interference fit, plug-in and other connection methods.

[0073] Please refer to Figure 3 In some embodiments, the metal sheet 12 is provided with a through hole 121 penetrating along the thickness direction thereof, and a limiting protrusion 17 is provided on the side of the first insulating member 13 facing the second insulating member 14 and / or on the side of the second insulating member 14 facing the first insulating member 13, and the limiting protrusion 17 cooperates with the through hole 121 at the radial upper limit of the through hole 121.

[0074] The limiting protrusion 17 cooperates with the through hole 121 in the radial limit position of the through hole 121 to prevent the metal sheet 12 from moving in the radial direction of the rod body 152, thereby ensuring the installation stability and position stability of the metal sheet 12 in the radial direction of the rod body 152 and avoiding the deterioration of the consistency of the indicators of the filter 10; and, since the limiting protrusion 17 cooperates with the through hole 121 of the metal sheet 12, the metal fastener 15 can be insulated and isolated from the hole wall of the through hole 121, thereby avoiding the metal sheet 12 from contacting the rod body 152 and causing a short circuit.

[0075] In some embodiments, a side of the first insulating member 13 facing the second insulating member 14 and a side of the second insulating member 14 facing the first insulating member 13 are both provided with a limiting protrusion 17. Optionally, the first insulating member 13 and the second insulating member 14 have the same structure, that is, the first insulating member 13 and the second insulating member 14 are made of the same material, so that only one material needs to be produced to reduce costs; and during assembly, there is no need to distinguish the installation positions of the first insulating member 13 and the second insulating member 14 on both sides of the metal sheet 12, thereby improving assembly efficiency. Of course, the structures of the first insulating member 13 and the second insulating member 14 may also be different.

[0076] Among them, the two limiting protrusions 17 are both in the through hole 121. In the thickness direction of the metal sheet 12, the sum of the sizes of the two limiting protrusions 17 is smaller than the thickness of the metal sheet 12, that is, there is a gap between the two limiting protrusions 17. In this way, the two limiting protrusions 17 will not interfere with each other in the thickness direction of the metal sheet 12, ensuring that the first insulating member 13 and the second insulating member 14 can clamp the metal sheet 12 to prevent the metal sheet 12 from moving in its thickness direction.

[0077] Optionally, the first insulating member 13 is provided with a first through hole 131 , the second insulating member 14 is provided with a second through hole 141 , and two limiting protrusions 17 are respectively provided at the edge of the first through hole 131 and the second through hole 141 .

[0078] In other embodiments, the limiting protrusion 17 may be provided only on the side of the first insulating member 13 facing the second insulating member 14, and the side of the second insulating member 14 facing the first insulating member 13 is a plane; or, the limiting protrusion 17 may be provided only on the side of the second insulating member 14 facing the first insulating member 13, and the side of the first insulating member 13 facing the second insulating member 14 is a plane; or, both the side of the first insulating member 13 facing the second insulating member 14 and the side of the second insulating member 14 facing the first insulating member 13 are planes, as long as it is ensured that under the fastening force of the metal fastener 15, the first insulating member 13 and the second insulating member 14 clamp the metal sheet 12 so that it will not move and the metal fastener 15 is not in direct contact with the metal sheet 12.

[0079] Please also refer to Figure 3 and Figure 5 In some embodiments, the limiting protrusion 17 is an annular protrusion located in the through hole 121.

[0080] Optionally, the through hole 121 is a circular hole, and the limiting protrusion 17 is a circular ring-shaped protrusion.

[0081] Please also refer to Figure 2 and Figure 4 In some embodiments, a fixing protrusion 16 is provided on the inner wall surface of the cavity 11 , and a fixing hole 161 is opened in the fixing protrusion 16 .

[0082] It can be understood that the fixing protrusion 16 can be integrally formed with the inner wall of the cavity 11; or, the fixing protrusion 16 is fixed to the inner wall surface of the cavity 11 by welding, threaded connection, clamping or fastener connection.

[0083] In this embodiment, when the bottom wall of the cavity 11 is relatively thin, by providing a fixing protrusion 16 on the inner wall surface of the cavity 11, the depth of the fixing hole 161 can be increased, thereby increasing the matching area between the rod body 152 of the metal fastener 15 and the fixing hole 161, thereby ensuring the stability of the metal sheet 12 fixed in the cavity 11.

[0084] Moreover, the fixing protrusion 16 also plays the role of raising the metal sheet 12, which is beneficial to optimizing the index of the filter 10. For example, when the metal sheet 12 is a flying rod sheet or a coupling sheet, it is beneficial to increase the coupling strength between the resonators 18; when the metal sheet 12 is a tap sheet or a connecting sheet, it is beneficial to increase the signal strength on the metal sheet 12; when the metal sheet 12 is a low-pass sheet, it is beneficial to achieve a better suppression effect; when the metal sheet 12 is a sheet-shaped resonant rod, it is beneficial to achieve a better RF index (such as frequency index) of the filter 10.

[0085] In other embodiments, the fixing protrusion 16 is not disposed on the inner wall surface of the cavity 11 , and the fixing hole 161 is directly opened in the inner wall surface of the cavity 11 .

[0086] It should be noted that, when there are multiple metal fasteners 15 , the number of fixing protrusions 16 may correspond to the number of metal fasteners 15 one-to-one, or the number of fixing protrusions 16 may be greater than the number of metal fasteners 15 .

[0087] In some embodiments, the filter 10 further includes a resonant member 18 disposed in the cavity 11 , and the fixing protrusion 16 is arranged corresponding to the resonant member 18 ; an end of the metal sheet 12 is fixed on the fixing protrusion 16 .

[0088] The resonator 18 may be a metal resonator or a dielectric resonator.

[0089] The end of the metal sheet 12 is fixed on the fixing convex portion 16 arranged corresponding to the resonant element 18, and other filter elements can transmit signals and energy to the resonant element 18 through the metal sheet 12, or the resonant element 18 can also transmit signals and energy to other filter elements through the metal sheet 12. It can be understood that one end of the metal sheet 12 is fixed on the fixing convex portion 16 arranged corresponding to the resonant element 18, and the other end of the metal sheet 12 is coupled and connected with other filter elements; the other filter element can be another resonant element 18, or a connector, a low-pass filter, a tap, etc.

[0090] It should be noted that the other end of the metal sheet 12 is coupled and connected with other filtering elements. The coupling connection here can be achieved by fixing the other end of the metal sheet 12 on a fixing protrusion 16 arranged corresponding to the other filtering elements. The coupling connection can also be achieved by welding, overlapping, plugging, fastener connection, crimping, riveting, or interference connection with the other end of the metal sheet 12 and other filtering elements. The coupling connection can also be achieved by suspending the other end of the metal sheet 12 and spacing it from other filtering elements.

[0091] Please also refer to Figure 1 and Figure 2 In some embodiments, the number of the resonant elements 18 is at least three, and the at least three resonant elements 18 include a first resonant element 18a, a second resonant element 18b, and a third resonant element 18c that are coupled in sequence, and the first resonant element 18a, the second resonant element 18b, and the third resonant element 18c are arranged in a straight line; the first resonant element 18a and the third resonant element 18c are respectively provided with fixing protrusions 16, and the two ends of the metal sheet 12 are respectively fixed on the two fixing protrusions 16, so that the first resonant element 18a and the third resonant element 18c are cross-coupled.

[0092] The first resonant component 18 a and the third resonant component 18 c are two non-cascaded resonant components 18 in the cavity 11 .

[0093] The plane where the center lines of the first resonator 18a, the second resonator 18b and the third resonator 18c are located is taken as the reference plane C, the two fixing protrusions 16 and the metal sheet 12 are both on the same side of the reference plane C, and the two fixing protrusions 16 are respectively arranged close to the first resonator 18a and the third resonator 18c.

[0094] By adopting the above technical solution, the metal sheet 12 is fixed by two fixing protrusions 16, which is conducive to ensuring the stability of the metal sheet 12 after being fixed, and at the same time can achieve capacitive cross-coupling of two non-adjacent resonators 18 among the multiple resonators 18 arranged in a straight line.

[0095] Please also refer to Figure 2 and Figure 4 In some embodiments, the fixing protrusion 16 is disposed on the bottom wall of the cavity 11, and the filter 10 also includes a mounting column 181 disposed on the bottom wall of the cavity 11, and the resonator 18 is correspondingly mounted on the mounting column 181; a connecting rib 19 is provided between the fixing protrusion 16 and the corresponding mounting column 181.

[0096] Specifically, there are at least three mounting posts 181, and the at least three mounting posts 181 include a first mounting post 181a, a second mounting post 181b, and a third mounting post 181c. The first resonant member 18a is mounted on the first mounting post 181a, the second resonant member 18b is mounted on the second mounting post 181b, and the third resonant member 18c is mounted on the third mounting post 181c. The first mounting post 181a, the second mounting post 181b, and the third mounting post 181c can all be integrally formed with the bottom wall of the cavity 11; or the first mounting post 181a, the second mounting post 181b, and the third mounting post 181c can be equally connected to the bottom wall of the cavity 11.

[0097] Two fixing protrusions 16 are provided, a connecting rib 19 is provided between one fixing protrusion 16 and the first mounting column 181 a , and a connecting rib 19 is provided between the other fixing protrusion 16 and the third mounting column 181 c .

[0098] By setting a connecting rib 19 between the fixing protrusion 16 and the corresponding mounting column 181, the stability of the fixing protrusion 16 is ensured, and then the stability of the metal sheet 12 after being fixed on the fixing protrusion 16 is ensured; at the same time, it is conducive to the integrated processing of the fixing protrusion 16 and the corresponding mounting column 181. In addition, the connecting rib 19 connects the fixing protrusion 16 with the mounting column 181, and the signal can be transmitted in sequence between the resonator 18, the mounting column 181, the connecting rib 19, the fixing protrusion 16 and the metal sheet 12, which can enhance the signal transmission strength and coupling strength between the mounting column 181 and the fixing protrusion 16, and then increase the signal transmission strength and transmission effect between the resonator 18 and the metal sheet 12; when the two ends of the metal sheet 12 are respectively fixed to the two fixing protrusions 16 corresponding to the two resonators 18, the coupling strength between the two resonators 18 can be enhanced by setting the connecting rib 19.

[0099] In other embodiments, the connecting rib 19 may not be provided between the fixing protrusion 16 and the corresponding mounting column 181 . If the stability of the fixing protrusion 16 is to be ensured, the diameter of the fixing protrusion 16 may be increased.

[0100] In other embodiments, the mounting column 181 is not provided, and the resonator 18 can be integrally formed with the bottom wall of the cavity 11; or, the resonator 18 can be directly fixed on the bottom wall of the cavity 11. In this case, a connecting rib 19 can be provided between the fixing protrusion 16 and the corresponding resonator 18.

[0101] A second aspect of the present application provides a communication device, which includes the filter 10 according to the first aspect.

[0102] The communication device adopts all the embodiments of the filter 10 described above, and thus has all the beneficial effects of the above embodiments, which will not be described one by one here.

[0103] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A filter, characterized in that: It includes a cavity, a metal sheet, a first insulating member, a second insulating member and a metal fastener, wherein a fixing hole is provided in the cavity, and the first insulating member and the second insulating member are respectively located on both sides of the metal sheet in the thickness direction thereof; the metal fastener includes a head and a rod body connected to the head, the rod body sequentially passes through the first insulating member, the metal sheet and the second insulating member and is inserted into the fixing hole, and a limiting portion is provided on the rod body, and the limiting portion is used to limit the depth of the rod body inserted into the fixing hole.

2. The filter according to claim 1, characterized in that: The rod body includes a first rod segment and a second rod segment connected to the first rod segment. The cross section of the first rod segment is larger than the cross section of the second rod segment. An annular step is formed at the connection between the first rod segment and the second rod segment, and the annular step constitutes the limiting portion.

3. The filter according to claim 2, characterized in that: An internal thread is arranged in the fixing hole, and an external thread matching with the internal thread is arranged on the outer peripheral surface of the second rod segment.

4. The filter according to claim 1, characterized in that: The limiting portion includes a plurality of protrusions arranged on the outer peripheral wall of the rod body, and the plurality of protrusions are distributed at intervals along the circumference of the rod body.

5. The filter according to claim 1, characterized in that: The limiting portion is a limiting ring arranged on the outer peripheral wall of the rod body.

6. The filter according to claim 1, characterized in that: The metal sheet is provided with a through hole penetrating along its thickness direction, and a limiting protrusion is provided on the side of the first insulating member facing the second insulating member and / or the side of the second insulating member facing the first insulating member, and the limiting protrusion cooperates with the through hole in the radial limit position of the through hole.

7. The filter according to any one of claims 1 to 6, characterized in that: A fixing convex portion is arranged on the inner wall surface of the cavity, and the fixing hole is opened in the fixing convex portion.

8. The filter according to claim 7, characterized in that: The filter further comprises a resonant component arranged in the cavity, the fixing protrusion is arranged corresponding to the resonant component; and the end of the metal sheet is fixed on the fixing protrusion.

9. The filter according to claim 8, characterized in that: The number of the resonant components is at least three, and the at least three resonant components include a first resonant component, a second resonant component, and a third resonant component that are coupled in sequence, and the first resonant component, the second resonant component, and the third resonant component are arranged in a straight line; the first resonant component and the third resonant component are respectively provided with the fixing protrusions, and the two ends of the metal sheet are respectively fixed on the two fixing protrusions, so that the first resonant component and the third resonant component are cross-coupled.

10. A communication device, characterized in that: Comprising the filter as claimed in any one of claims 1-9.

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