Filters and communication equipment

Abstract

This application relates to the field of communications technology and provides a filter and communications equipment. The filter includes a cavity, wherein the cavity includes a first end and a second end disposed opposite each other, with a line connecting the center of the end face of the first end and the center of the end face of the second end being a first centerline. The cavity includes at least three side surfaces, each side surface surrounding the first centerline, with two adjacent side surfaces intersecting each other. A cavity is defined on each of the at least three side surfaces. The filter provided by this application can effectively improve the space utilization of the filter and help expand the filter's application scenarios.

Description

Technical Field

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

[0002] As a frequency selection device, filters are widely used in the field of communications to select communication signals and filter out clutter or interference signals outside the communication signal frequency. That is, they can allow useful signals to pass through with as little attenuation as possible and attenuate useless signals as much as possible.

[0003] A cavity filter is a filter that uses a cavity structure, but the space utilization rate of the cavity filter in related technologies is not high enough, especially when the cavity filter is applied to radio frequency devices with multiple filtering channels such as combiners and power splitters. The cavities corresponding to the multiple filtering channels are all laid flat on the same plane, which greatly occupies space and creates certain difficulties for the design of the filter and the design of the application end of the filter. Summary of the Invention

[0004] The embodiments of the present application provide a filter and a communication device, which can improve the technical problem of insufficient space utilization of the filter.

[0005] In a first aspect, an embodiment of the present application provides a filter, which includes a cavity, the cavity including a first end and a second end arranged opposite to each other, and the line connecting the center of the end face of the first end and the center of the end face of the second end is a first center line; the cavity includes at least three side faces, each of the side faces surrounds the first center line, and two adjacent side faces are arranged to intersect; wherein, a cavity is respectively opened on at least three of the side faces.

[0006] The above technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0007] The filter provided in the embodiment of the present application has a cavity including at least three side surfaces, and each side surface is arranged around the first center line, and two adjacent side surfaces are intersected, and cavities are respectively provided on at least three side surfaces. Therefore, at least three cavities arranged around the first center line can be formed on the cavity, so that the filter can form at least three filtering channels arranged around the first center line, and the functions of the original multiple filters can be realized on the basis of the volume occupied by one filter, and the space around the cavity can be fully utilized, which can effectively improve the space utilization rate of the filter and help expand the application scenarios of the filter.

[0008] In some embodiments, the side surface is arranged parallel to the first center line; and the side surface extends in a direction from the first end to the second end.

[0009] In some embodiments, the cavity is a prismatic structure, and the number of the side surfaces is at least five.

[0010] In some embodiments, the cavity is a regular prism structure; and / or, at least one cavity is defined on each of the side surfaces.

[0011] In some embodiments, a signal element is disposed in the cavity, and the structures of the signal elements in the cavities on at least two of the side surfaces are different.

[0012] In some embodiments, the equivalent resonant circuits in the cavity on at least two of the side surfaces are different.

[0013] In some embodiments, the filter further includes at least three cover plates, each of which covers an opening of the cavity, and each of the cover plates is arranged in a one-to-one correspondence with the cavity.

[0014] In some embodiments, at least one of the side surfaces on which the cavity is formed is further provided with a groove, and the cavity is formed on the inner bottom wall of the groove; the cover plate is located in the groove.

[0015] In some embodiments, a signal element is disposed in the cavity; a first hole is formed on the end surface of the first end, and a second hole is formed on the inner wall of at least two of the cavities, the second hole being connected to the first hole; and the filter further comprises:

[0016] A first signal transmission component is disposed in the first hole; and

[0017] At least two second signal transmission components are arranged in the second hole in a one-to-one correspondence, and one end of the second signal transmission component is electrically connected or coupled to the first signal transmission component, and the other end of the second signal transmission component is electrically connected or coupled to the corresponding signal element in the cavity.

[0018] In some embodiments, the filter further includes at least two insulating members, which are inserted into the second holes in a one-to-one correspondence; a first through hole is formed on the insulating member, and the second signal transmission member is passed through the first through hole.

[0019] In some embodiments, the insulating part includes a plug-in portion and an abutment portion connected to the plug-in portion, the plug-in portion and the abutment portion form a step structure, the plug-in portion is inserted into the second hole, and the abutment portion is located in the cavity and is used to abut the inner wall of the cavity.

[0020] In some embodiments, a connection hole is formed on the first signal transmission member, and one end of the second signal transmission member is inserted into the connection hole.

[0021] In some embodiments, the second signal transmission component includes an insertion section and an abutment section connected to the insertion section, the insertion section and the abutment section form a step structure, the insertion section is inserted into the connecting hole, and the abutment section is used to abut the outer surface of the first signal transmission component.

[0022] In some embodiments, a plurality of third holes are formed on the end surface of the second end, and each of the third holes is connected to the cavity on at least one of the side surfaces;

[0023] The filter further includes at least one third signal transmission component. The third hole is provided with at least one third signal transmission component. One end of the third signal transmission component is used for being electrically connected or coupled to the signal element in the cavity.

[0024] In some embodiments, the filter further comprises:

[0025] a first connector, disposed at the first end and electrically connected or coupled to the first signal transmission element; and

[0026] At least one second connector is disposed at the second end, and each of the second connectors is electrically connected or coupled to at least one of the third signal transmission components.

[0027] In a second aspect, an embodiment of the present application provides a communication device, which includes the filter described in any of the above embodiments.

[0028] 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

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or related technologies. 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 any creative work.

[0030] Figure 1 A schematic diagram of the structure of the filter provided in some embodiments of the present application;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure of the filter from another perspective;

[0032] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure in the AA direction;

[0033] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0034] Figure 5 for Figure 1 The decomposition structure diagram of the filter shown is one;

[0035] Figure 6 for Figure 1 The second schematic diagram of the decomposition structure of the filter shown;

[0036] Figure 7 An exploded schematic diagram of a first signal transmission component, a second signal transmission component, and an insulating component provided in some embodiments of the present application;

[0037] Figure 8 for Figure 1 The first schematic diagram of the structure of the filter after removing the cover plate;

[0038] Figure 9 for Figure 1 The second schematic diagram of the structure of the filter after removing the cover plate;

[0039] Figure 10 for Figure 1 The third structural diagram of the filter after removing the cover is shown.

[0040] Among them, the reference numerals in the figures are:

[0041] 100. filter; 10. cavity; 11. first end; 12. second end; 101. side; 1010. cavity; 20. signal element; 30. cover; 1011. groove; 21. first resonator; 22. second resonator; 23. third resonator; 24. fourth resonator; 25. low-pass structure; 1101. first hole; 1102. second hole; 40. first signal transmission component; 401. connecting hole; 50. second signal transmission component; 51. plug-in section; 52. abutting section; 60. insulating component; 61. plug-in portion; 62. abutting portion; 601. first through hole; 1201. third hole; 70. third signal transmission component; 80. first connector; 90. second connector. DETAILED DESCRIPTION

[0042] The following describes in detail embodiments of the present application, examples of which 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 application, and should not be construed as limiting the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the accompanying drawings are intended to cover non-exclusive inclusions.

[0044] In the description of the embodiments of the present application, the terms "inside", "outside", "up", "down", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application 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. Therefore, they cannot be understood as limitations on the present application.

[0045] The terms "first," "second," and the like are used solely for purposes of distinction and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. For example, the terms "first signal transmission element" and "second signal transmission element" are used solely to distinguish between the different signal transmission elements and do not limit their order or quantity. The first signal transmission element could be named "second signal transmission element," and the second signal transmission element could be named "first signal transmission element" without departing from the scope of the various described embodiments. Furthermore, the terms "first," "second," and the like do not necessarily specify that the features being referred to are different.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connected", "connected", etc. 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 (it can be abutment, or it can be pulled together through a connecting structure), or it can be an electrical connection; it can be directly connected, or it can be indirectly connected 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 this application can be understood according to the specific circumstances. The meaning of "plurality" is at least two, that is, two and more; the meaning of "multiple" is at least two, that is, two and more.

[0047] In this application, "and / or" is simply a way to describe the relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0048] It should be noted that, in this application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or explanations. Any embodiment or design described in this application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example" is intended to present related concepts in a concrete way, meaning that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words in various places 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 can be combined with other embodiments.

[0049] In order to make the purpose, technical solutions and advantages of this application more clear, this application is further described in detail below with reference to the accompanying drawings and embodiments.

[0050] As a frequency selection device, filters are widely used in the field of communications to select communication signals and filter out clutter or interference signals outside the communication signal frequency. That is, they can allow useful signals to pass through with as little attenuation as possible and attenuate useless signals as much as possible.

[0051] Generally speaking, the size of filter products is usually limited to a certain extent. Therefore, in order to achieve the performance requirements of filter products within a limited space, it is necessary to maximize the use of space. Cavity filters are filters with a cavity structure, but the cavity filters in related technologies usually have a cavity on one side, resulting in insufficient space utilization. Especially in some cases, due to space limitations, the size of the filter cavity will be affected, which in turn affects the performance index requirements of the filter product (such as intermodulation, suppression, insertion loss, return loss, etc.). In addition, when the filter is applied to radio frequency devices with multiple filter channels such as combiners and power dividers, the cavities corresponding to the multiple filter channels are all laid out on the same plane, which greatly occupies space and causes certain difficulties in the design of the filter and the design of the application end of the filter.

[0052] Based on this, in order to improve the technical problem of insufficient space utilization of the filter, this application proposes the following solution.

[0053] See also Figures 1 to 3, an embodiment of the present application provides a filter 100, the filter 100 includes a cavity 10, the cavity 10 includes a first end 11 and a second end 12 arranged opposite to each other, and the line connecting the center of the end face of the first end 11 and the center of the end face of the second end 12 is a first center line a. The cavity 10 includes at least three side faces 101, each side face 101 surrounds the first center line a, and two adjacent side faces 101 are arranged to intersect. Among them, a cavity 1010 is respectively provided on at least three side faces 101, that is, there are at least three side faces 101 in each side face 101, and a cavity 1010 is provided on each side face 101 of the at least three side faces 101. The cavity 1010 is a cavity that can oscillate with an electric magnetic field, and a filtering channel is formed in the cavity 1010. One or more filtering channels can be formed in one cavity 1010 according to actual needs.

[0054] It is understood that the first end 11 and the second end 12 are the two ends of the cavity 10 along the length of the cavity 10 and are both part of the cavity 10. The end surface of the first end 11 and the end surface of the second end 12 can be various regular or irregular surfaces, and can be flat or curved. The center of the end surface of the first end 11 can also be considered as the centroid or orthocenter of the end surface of the first end 11. Similarly, the center of the end surface of the second end 12 can also be considered as the centroid or orthocenter of the end surface of the second end 12.

[0055] It should be understood that the first center line a is not an actual line, but an imaginary line defined for the purpose of explaining the solution of the present application. The first center line a is substantially parallel to the length direction of the cavity 10 .

[0056] The side surfaces 101 are part of the outer surface of the cavity 10 and can be flat, or can be a surface formed by multiple coplanar edges, or can be a surface formed by multiple coplanar points or lines. Each side surface 101 is arranged around the first center line a, that is, each side surface 101 is roughly arranged around the circumference of the first center line a; however, each side surface 101 can be evenly arranged around the first center line a, or can be unevenly arranged. The intersection of two adjacent side surfaces 101 means that the two adjacent side surfaces 101 are neither parallel nor coplanar, but rather form an angle greater than 0°.

[0057] From the above, it can be seen that the filter 100 provided in the embodiment of the present application, since the cavity 10 of the filter 100 includes at least three side faces 101, and each side face 101 is surrounded by the first center line a, two adjacent side faces 101 are arranged to intersect, and at least three side faces 101 are respectively provided with cavities 1010, so at least three cavities 1010 arranged around the first center line a can be formed on the cavity 10, so that the filter 100 can form at least three filtering channels arranged around the first center line a, and can realize the functions of the original multiple filters based on the volume occupied by one filter 100, and can make full use of the circumferential space of the cavity 10, which can effectively improve the space utilization rate of the filter 100 and help expand the application scenarios of the filter 100.

[0058] The corresponding part of each cavity 1010 of the filter 100 can be regarded as a sub-filter with filter function, so the function of each sub-filter can be flexibly set according to actual needs, which is conducive to improving the functional diversity of the filter 100 and the flexibility of applicable scenarios.

[0059] For example, in some cases, each cavity 1010 of the filter 100 can be set relatively independently, that is, the functions of multiple filters can be realized. The sub-filters formed by the corresponding parts of each cavity 1010 can be set to have different filtering functions respectively, so as to be able to adapt to scenarios with multiple different index requirements (for example, each sub-filter can be suitable for different frequency bands, or each sub-filter has different functions such as combiner, power divider, amplifier, duplexer, low-pass filter, band-pass filter, high-pass filter, etc.); of course, the sub-filters formed by the corresponding parts of at least two cavities 1010 can have the same filtering function. Each sub-filter can work at the same time, or there can be at least one sub-filter working while the other sub-filters stop working (for example, they can be used as spare sub-filters). The specific setting can be flexibly based on actual needs.

[0060] For example, in other cases, at least two cavities 1010 of the filter 100 can be signal-connected (for example, signal communication can be achieved through a signal transmission element or a window, etc.), that is, it can be applied to a combiner or a power splitter. For example, the signals of each cavity 1010 of the filter 100 can be connected, that is, the signals in each cavity 1010 can be combined into one path, or one input signal can be distributed to each cavity 1010. For another example, the signals in two, three, or more cavities 1010 can be connected (multiple cavities 1010 at any position can be selected for signal communication as needed) to achieve signal combining or distribution, and there is at least one cavity 1010 that is not signal-connected to at least one other cavity 1010. Taking the filter 100 as an example, the number of cavities 1010 is five, and two of the cavities 1010 can be connected by signal, and the remaining three cavities 1010 are relatively independent and not connected by signal with other cavities 1010; two of the cavities 1010 can be connected by signal, another two cavities 1010 can be connected by signal, and the remaining one cavity 1010 is relatively independent and not connected by signal with other cavities 1010; three of the cavities 1010 can be connected by signal, and the remaining two cavities 1010 are relatively independent and not connected by signal with other cavities 1010; three of the cavities 1010 can be connected by signal, and the remaining two cavities 1010 can be connected by signal; four of the cavities 1010 can be connected by signal, and the remaining one cavity 1010 is relatively independent and not connected by signal with other cavities 1010. The specific configuration can be made according to different application requirements. For example, when used in a combiner, each cavity 1010 can be flexibly configured according to the frequency band and index requirements of the combiner.

[0061] In some embodiments, see Figures 1 to 3 The side surface 101 is arranged parallel to the first center line a. The side surface 101 extends in a direction from the first end 11 to the second end 12.

[0062] It is understood that when side surface 101 is parallel to first centerline a, it means that side surface 101 is substantially parallel to first centerline a, with some deviation permitted. Side surface 101 extends in the direction from first end 11 to second end 12, and the length direction of side surface 101 can also be considered to be substantially parallel to the direction from first end 11 to second end 12.

[0063] This arrangement, because the side surface 101 is parallel to the first centerline a, facilitates a more regular structure of the cavity 10 and facilitates the cavities 1010 defined on the side surface 101 to be approximately parallel to the first centerline a. Compared to a solution in which the side surface 101 is inclined relative to the first centerline a, this makes the cavities 1010 more regular and facilitates cavity arrangement. Furthermore, because the side surface 101 extends in a direction from the first end 11 to the second end 12, the cavities 1010 defined on the side surface 101 facilitate extending in a direction from the first end 11 to the second end 12. This allows full utilization of the space within the cavity 10 along its length, further improving the space efficiency of the filter 100.

[0064] In some embodiments, see Figures 1 to 3 , the cavity 10 is a prismatic structure, that is, the cavity 10 as a whole is roughly prismatic in shape, that is, the cross-section of the cavity 10 (the cross-section perpendicular to the first center line a) is roughly polygonal. The number of side surfaces 101 is at least five, and can be five, six, seven, or more than seven, and can be set according to actual needs. For example, when the number of side surfaces 101 is five, the cavity 10 can be roughly a pentagonal prism structure, when the number of side surfaces 101 is six, the cavity 10 can be roughly a hexagonal prism structure, and so on. When the number of side surfaces 101 is N, the cavity 10 can be roughly an N-prism structure, where N is a positive integer greater than or equal to five.

[0065] In this arrangement, since the cavity 10 is a prismatic structure and the number of side faces 101 is at least five, at least a pentagonal prism structure can be formed. Therefore, at least five cavities 1010 can be opened along the circumference of the first center line a, which is conducive to making the side faces 101 relatively compact, reducing structural redundancy, and making full use of the circumferential space of the cavity 10, further improving utilization.

[0066] Optionally, in some embodiments, see Figures 1 to 3 The cavity 10 is a regular prism structure, that is, the cross section of the cavity 10 is substantially a regular polygon. Each side surface 101 is provided with at least one cavity 1010 , that is, one or more cavities 1010 may be provided on the side surface 101 .

[0067] With such an arrangement, the side surfaces 101 can be evenly arranged around the first center line a, and the cavity 1010 can also be evenly arranged around the first center line a, which can make the structure of the cavity 10 more regular, and the arrangement of the cavity 1010 more compact and balanced, making it convenient to set the filter 100 in a corresponding environment when it is used, and the regular structure is more convenient for production and manufacturing.

[0068] For example, see Figures 1 to 3The cavity 10 is a regular pentagonal prism structure, and the number of side surfaces 101 is five. A cavity 1010 is opened on each side surface 101 , thus forming five cavities 1010 .

[0069] With such an arrangement, compared with the case where the cavity 10 is a triangular prism structure, a quadrangular prism structure, or the cavity 10 is provided with three cavities 1010 and four cavities 1010, when the volume of the cavity 10 is the same, there are more cavities 1010, which is conducive to accommodating multiple filtering channels to improve space utilization; compared with the case where the cavity 10 is a hexagonal prism structure, or the cavity 10 is provided with six or more cavities 1010, when the volume of the cavity 10 is the same, there can be a more moderate number of cavities 1010 to reduce the possibility of the size of the cavity 1010 (such as the depth dimension) being small and difficult to meet the performance due to the need to set too many cavities 1010.

[0070] Of course, in some other embodiments, the cavity 10 may not be a regular prism structure, for example, it may be an oblique prism structure, but is not limited thereto, and may also be a structure of other shapes.

[0071] In some other embodiments, there may be at least one side surface 101 without a cavity 1010 .

[0072] In some embodiments, see Figure 3 and Figure 4 ,as well as Figures 8 to 10 The signal element 20 is disposed in the cavity 1010. The structures of the signal elements 20 in the cavities 1010 on at least two side surfaces 101 are different. The structures of the signal elements 20 in any two cavities 1010 may be different, or the structures of the signal elements 20 in at least two cavities 1010 may be different, but the structures of the signal elements 20 in at least two cavities 1010 may be the same.

[0073] It is understood that the signal element 20 is an element capable of signal transmission or signal processing, and may be, for example, a resonator, a metal sheet, a metal plate, a coupling plate, a PCB, a low-pass structure, etc., but is not limited thereto. The two signal elements 20 having different structures refer to the two signal elements 20 having different types or shapes, resulting in different structures.

[0074] In this way, the arrangement of the signal element 20 facilitates the formation of a corresponding equivalent resonant circuit in the cavity 1010, which is beneficial to the oscillation and transmission of the electromagnetic signal to achieve a filtering effect; since the structures of the signal elements 20 in at least two cavities 1010 are different, it is beneficial to form different equivalent resonant circuits, so that different cavities 1010 can have different effects, achieve different filtering effects, and facilitate the realization of functional diversification; the filter 100 can have multiple filtering channels with different functions and realize multiple filter functions.

[0075] Optionally, in some embodiments, see Figure 3 ,as well as Figures 8 to 10 The equivalent resonant circuits in the cavities 1010 on at least two sides 101 are different. It is understood that the cavity 1010 and its internal structure can be equivalent to a combination of inductance and capacitance to form an equivalent resonant circuit and achieve microwave filtering.

[0076] In this configuration, since the equivalent resonant circuits in at least two cavities 1010 are different, the at least two cavities 1010 can perform different filtering functions, thereby achieving functional diversification of the filter 100. The filter 100 can have multiple filtering channels with different functions, thus achieving multiple filter functions.

[0077] For example, see Figure 3 ,as well as Figures 8 to 10 There are five side surfaces 101, and each side surface 101 has a cavity 1010, thus forming five cavities 1010. The equivalent resonant circuit within each cavity 1010 is different. Different signal components, such as rib structures, resonators, and low-pass structures, can be installed in different cavities 1010. The arrangement of rib structures, resonators, and other signal components can also be changed to achieve different cavity arrangements, thereby forming different equivalent resonant circuits.

[0078] Specifically, four of the cavities 1010 are respectively provided with a first resonator 21, a second resonator 22, a third resonator 23, and a fourth resonator 24. The first resonator 21, the second resonator 22, the third resonator 23, and the fourth resonator 24 are mutually exclusive. The remaining cavity 1010 is provided with a low-pass structure 25. Thus, the signal elements 20 in the five cavities 1010 are mutually exclusive. It is understood that the first resonator 21, the second resonator 22, the third resonator 23, the fourth resonator 24, and the low-pass structure 25 are all signal elements 20.

[0079] Optionally, in some other embodiments, the equivalent resonant circuits in at least two cavities 1010 are the same.

[0080] This arrangement allows cavities 1010 with the same equivalent resonant circuit to perform the same filtering function. When one cavity 1010 is operating, the other cavity 1010 with the same equivalent resonant circuit can be inoperative and serve as a backup. This ensures that if one cavity 1010 fails or requires maintenance, the backup cavity 1010 can still operate. Therefore, while the filter 100 meets product performance requirements, it can also reserve at least one cavity 1010 for backup.

[0081] In some embodiments, see Figures 1 to 3 ,as well as Figure 5 and Figure 6 The filter 100 further includes at least three cover plates 30, which are disposed over the openings of the cavities 1010, and the cover plates 30 are disposed one-to-one with the cavities 1010. The cover plates 30 cover the corresponding cavities 1010 to form a complete and orderly filtering channel, thereby realizing a filter function.

[0082] It can be understood that the cover plate 30 is a substantially plate-shaped structure, which is used to cooperate with the cavity 10 to seal the cavity 1010 .

[0083] In this configuration, the cover plate 30 can seal the cavity 1010 to improve the stability of electromagnetic signal transmission in the cavity 1010. Since each cover plate 30 is correspondingly installed on a cavity 1010, the cover plates 30 installed on each cavity 1010 are relatively independent. Therefore, when one cavity 1010 needs to be disassembled or maintained, it is not easy to interfere with other cavities 1010.

[0084] Of course, in some other embodiments, the cover plates 30 covering two or more adjacent cavities 1010 may be connected, and it can be considered that the multiple cavities 1010 share one cover plate.

[0085] Optionally, in some embodiments, see Figure 1 、 Figure 2 、 Figure 3 as well as Figure 5 At least one of the side surfaces 101 with the cavity 1010 is further provided with a groove 1011 , and the inner bottom wall of the groove 1011 is further provided with a cavity 1010 . The cover plate 30 is located in the groove 1011 .

[0086] It can be understood that the groove 1011 may be provided on each side 101 with a cavity 1010; or the groove 1011 may be provided on one or more side surfaces 101 with a cavity 1010, and there may be at least one side surface 101 with a cavity 1010 without a groove 1011.

[0087] With such a configuration, the groove 1011 can provide a placement space for the cover plate 30 , thereby reducing the possibility of the cover plate 30 protruding from the cavity 10 and not easily occupying external space.

[0088] Optionally, see Figure 1 、 Figure 2 、 Figure 3 as well as Figure 5 The cover plate 30 may be connected to the inner bottom wall of the groove 1011 , for example, by welding, screws or bolts, etc., but is not limited thereto.

[0089] Optionally, a tuning member, such as a tuning screw, may be provided on the cover plate 30. A coupling adjustment member may also be provided on the cover plate 30 to adjust the coupling between the two resonators.

[0090] In some embodiments, see Figure 4 、 Figure 5 、 Figure 7 as well as Figure 8 , a signal element 20 is disposed in the cavity 1010. A first hole 1101 is formed on the end surface of the first end 11, and a second hole 1102 is formed on the inner wall of at least two cavities 1010, respectively, and the second hole 1102 is connected to the first hole 1101. The filter 100 further includes a first signal transmission component 40 and at least two second signal transmission components 50. The first signal transmission component 40 is disposed in the first hole 1101. The second signal transmission components 50 are disposed in the second holes 1102 in a one-to-one correspondence, and one end of the second signal transmission component 50 is electrically connected or coupled to the first signal transmission component 40, and the other end of the second signal transmission component 50 is electrically connected or coupled to the signal element 20 in the corresponding cavity 1010.

[0091] It is understood that the first hole 1101 may be a blind hole or a through hole, and the second hole 1102 is a through hole connecting the cavity 1010 and the first hole 1101. The first signal transmission member 40 and the second signal transmission member 50 are both structural members for transmitting signals, and may be, for example, a connecting rod, a connecting column, a connecting piece, an inner conductor, etc., but are not limited thereto. Figure 7 2 , the first signal transmission member 40 and the second signal transmission member 50 are both connecting rods. The structures of the first signal transmission member 40 and the second signal transmission member 50 can be the same or different.

[0092] The first signal transmission member 40 being disposed within the first hole 1101 means that the first signal transmission member 40 is at least partially located within the first hole 1101, that is, it can be partially or completely disposed within the first hole 1101. Similarly, the second signal transmission member 50 being disposed within the second hole 1102 means that the second signal transmission member 50 is at least partially located within the second hole 1102, that is, it can be partially or completely disposed within the second hole 1102. The second signal transmission members 50 being disposed within the second holes 1102 in a one-to-one correspondence means that the number of second signal transmission members 50 is the same as the number of second holes 1102, and one second signal transmission member 50 is disposed within each second hole 1102.

[0093] With such a configuration, through the cooperation of the first signal transmission component 40 and at least two second signal transmission components 50, the signal can be transmitted from the first signal transmission component 40 to each second signal transmission component 50 respectively, and then transmitted to the cavity 1010 corresponding to the second signal transmission component 50, so that one signal input end can correspond to multiple cavities 1010, which is conducive to signal distribution. Of course, the signals of each second signal transmission component 50 can also be transmitted to the first signal transmission component 40, so that one signal output end can correspond to multiple cavities 1010, which is conducive to signal combining.

[0094] Optionally, in some embodiments, see Figure 4 、 Figure 5 、 Figure 7 as well as Figure 8 The filter 100 further includes at least two insulating members 60 , which are inserted into the second holes 1102 in a one-to-one correspondence. A first through hole 601 is formed on the insulating member 60 , and the second signal transmission member 50 is passed through the first through hole 601 .

[0095] It is understood that the insulating member 60 is a structural member having at least a surface made of insulating material, so as to provide insulation when in contact with a conductor. The insulating members 60 are inserted into the second holes 1102 in a one-to-one correspondence, meaning that the number of insulating members 60 is the same as the number of second holes 1102, and one insulating member 60 is inserted into each second hole 1102. The insulating member 60 may be partially or entirely located within the second hole 1102.

[0096] With this arrangement, the second signal transmission component 50 can be installed in the second hole 1102 through the insulating component 60 , which facilitates the installation of the second signal transmission component 50 and effectively reduces the possibility of a short circuit between the second signal transmission component 50 and the cavity 10 .

[0097] Optionally, see Figure 4 、 Figure 5 as well as Figure 7The insulating part 60 includes a plug-in portion 61 and a contact portion 62 connected to the plug-in portion 61, and the plug-in portion 61 and the contact portion 62 form a step structure; the plug-in portion 61 is inserted into the second hole 1102, and the contact portion 62 is located in the cavity 1010 and is used to abut the inner wall of the cavity 1010, which can realize the installation limit of the insulating part 60 and is conducive to improving the installation consistency of each insulating part 60.

[0098] For example, see Figure 1 、 Figure 4 、 Figure 5 as well as Figure 7 There are five side surfaces 101, and each side surface 101 is provided with a cavity 1010, thus forming five cavities 1010. A second hole 1102 is provided on the inner wall of each cavity 1010, so as to realize that the signal is transmitted to the five cavities 1010 respectively through the second signal transmission components 50 through the same first signal transmission component 40, or the signal of each second signal transmission component 50 is transmitted to the first signal transmission component 40.

[0099] Of course, in some other embodiments, second holes 1102 may be respectively opened on the inner walls of only two, three or four cavities 1010 to realize signal transmission to two, three or four cavities 1010 through the same first signal transmission component 40, or the signals of two, three or four cavities 1010 are all transmitted to the first signal transmission component 40, that is, there is at least one cavity 1010 that does not input or output signals through the first signal transmission component 40. For example, the remaining at least one cavity 1010 can input or output signals separately through other signal transmission components, or the remaining at least two cavities 1010 can input or output signals together through other signal transmission components.

[0100] Optionally, see Figure 4 、 Figure 5 as well as Figure 7 A connection hole 401 is provided on the first signal transmission component 40 , and one end of the second signal transmission component 50 is inserted into the connection hole 401 , which helps to improve the reliability of the connection between the second signal transmission component 50 and the first signal transmission component 40 .

[0101] Optionally, see Figure 4 、 Figure 5 as well as Figure 7 The second signal transmission component 50 includes an inserting section 51 and an abutting section 52 connected to the inserting section 51. The inserting section 51 and the abutting section 52 form a step structure. The inserting section 51 is inserted into the connecting hole 401. The abutting section 52 is used to abut the outer surface of the first signal transmission component 40, which can realize the installation limit of the second signal transmission component 50 and is beneficial to improve the installation consistency of the connection between the second signal transmission component 50 and the first signal transmission component 40.

[0102] Optionally, the connection between the second signal transmission component 50 and the first signal transmission component 40 may be welded to improve the reliability of the connection between the two.

[0103] Optionally, in some embodiments, see Figure 5 、 Figure 6 as well as Figure 8 A plurality of third holes 1201 are provided on the end surface of the second end 12, and each third hole 1201 is connected to a cavity 1010 on at least one side surface 101. The third holes 1201 and the cavities 1010 may correspond one to one, that is, one third hole 1201 is connected to one cavity 1010 ( Figure 6 ), multiple third holes 1201 may be connected to one cavity 1010 (for example, each third hole 1201 is connected to a filtering channel of the cavity 1010), or one third hole 1201 may be connected to multiple cavities 1010, and the specific setting can be made according to actual needs.

[0104] The filter 100 further includes at least one third signal transmission component 70. The third hole 1201 is provided with at least one third signal transmission component 70. Figure 6 The figure shows an example of a case where one third signal transmission member 70 is provided in each third hole 1201. Of course, multiple third signal transmission members 70 can also be provided in one third hole 1201. One end of the third signal transmission member 70 is used to electrically connect or couple with the signal element 20 in the cavity 1010; the third signal transmission member 70 can be provided in a one-to-one correspondence with the cavity 1010 ( Figure 6 (This is exemplarily shown in the figure); of course, each cavity 1010 may correspond to multiple third signal transmission elements 70. In this case, multiple filtering channels may be formed in the cavity 1010, and each third signal transmission element 70 may be used to correspond to a filtering channel of the cavity 1010. In this way, the signal in each cavity 1010 can be output or input respectively through the corresponding third signal transmission element 70.

[0105] It can be understood that the third signal transmission component 70 is a structural component for transmitting signals, for example, it can be a connecting rod, a connecting piece, a connecting column, an inner conductor, etc., but is not limited thereto.

[0106] Optionally, see Figure 1 and Figure 5The filter 100 further includes a first connector 80 and at least one second connector 90. The first connector 80 is provided at the first end 11 and is electrically connected or coupled to the first signal transmission member 40. The second connector 90 is provided at the second end 12, and each second connector 90 is electrically connected or coupled to at least one third signal transmission member 70. The second connector 90 can be provided in a one-to-one correspondence with the third signal transmission member 70 ( Figure 6 This situation is exemplarily shown in FIG), a second connector 90 can also be electrically connected or coupled to multiple third signal transmission members 70 (for example, the second connector 90 can be a cluster connector).

[0107] It can be understood that the first connector 80 and the second connector 90 are connectors used to connect two components to achieve signal transmission between the two components. They can be various types of connectors used for filters, such as BMA connectors (blind mate connectors), SMA connectors, SMP connectors, MBX connectors, PSMP connectors, TX connectors, etc., but are not limited to these.

[0108] With such a configuration, a signal can be input from the first connector 80, enter the cavity 1010 via the first signal transmission component 40 and the second signal transmission component 50, and the signal in each cavity 1010 can be output from the second connector 90 via the third signal transmission component 70; or, a signal can be input from the second connector 90, enter the cavity 1010 via the third signal transmission component 70, and the signal in the cavity 1010 can be output from the first connector 80 via the second signal transmission component 50 and the first signal transmission component 40.

[0109] The present application also provides a communication device, which includes the filter 100 of any of the above embodiments. It is understood that the communication device can be any device that requires a filter for communication, such as a communication base station, but is not limited thereto.

[0110] Since the communication device provided in the embodiment of the present application adopts the filter 100 of the above embodiment, it also has the technical effects brought by the technical solution of the filter 100 of any of the above embodiments, which will not be repeated here.

[0111] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A filter, characterized in that: The filter includes a cavity, which includes a first end and a second end arranged opposite to each other, and a line connecting the center of the end surface of the first end and the center of the end surface of the second end is a first center line; the cavity includes at least three side surfaces, each of which surrounds the first center line, and two adjacent side surfaces are arranged to intersect; wherein, at least three of the side surfaces are respectively provided with a cavity; a signal element is arranged in the cavity, and a plurality of the signal elements in each cavity are arranged at intervals along the extension direction of the first center line.

2. The filter according to claim 1, wherein The side surface is arranged parallel to the first center line; the side surface extends in a direction from the first end to the second end.

3. The filter according to claim 1, wherein The cavity is a prism structure, and the number of the side surfaces is at least five.

4. The filter according to claim 3, characterized in that The cavity is a regular prism structure; and / or, at least one cavity is formed on each of the side surfaces.

5. The filter according to claim 1, wherein The structures of the signal elements in the cavities on at least two of the side surfaces are different; or The equivalent resonant circuits in the cavity on at least two of the side surfaces are different.

6. The filter according to claim 1, wherein The filter further includes at least three cover plates, which are arranged to cover the openings of the cavities, and the cover plates are arranged in a one-to-one correspondence with the cavities.

7. The filter according to claim 6, characterized in that At least one of the side surfaces on which the cavity is formed is further provided with a groove, and the cavity is formed on the inner bottom wall of the groove; the cover plate is located in the groove.

8. The filter according to any one of claims 1 to 7, characterized in that A first hole is formed on the end surface of the first end, and a second hole is formed on the inner wall of at least two of the cavities, wherein the second hole is connected to the first hole; the filter further comprises: A first signal transmission component is disposed in the first hole; and At least two second signal transmission components are arranged in the second hole in a one-to-one correspondence, and one end of the second signal transmission component is electrically connected or coupled to the first signal transmission component, and the other end of the second signal transmission component is electrically connected or coupled to the corresponding signal element in the cavity.

9. The filter according to claim 8, characterized in that The filter further comprises at least two insulating members, the insulating members being inserted into the second holes in a one-to-one correspondence; a first through hole is formed on the insulating member, and the second signal transmission member is passed through the first through hole; the insulating member comprises an inserting portion and an abutting portion connected to the inserting portion, the inserting portion and the abutting portion forming a step structure, the inserting portion being inserted into the second hole, the abutting portion being located in the cavity and being used to abut against the inner wall of the cavity; and / or A connecting hole is provided on the first signal transmission component, and one end of the second signal transmission component is inserted into the connecting hole; the second signal transmission component includes an inserting section and an abutting section connected to the inserting section, the inserting section and the abutting section form a step structure, the inserting section is inserted into the connecting hole, and the abutting section is used to abut the outer surface of the first signal transmission component.

10. The filter according to claim 8, characterized in that A plurality of third holes are formed on the end surface of the second end, and each of the third holes is connected to the cavity on at least one of the side surfaces; The filter further includes at least one third signal transmission component. The third hole is provided with at least one third signal transmission component. One end of the third signal transmission component is used for being electrically connected or coupled to the signal element in the cavity.

11. The filter according to claim 10, wherein The filter further comprises: a first connector, disposed at the first end and electrically connected or coupled to the first signal transmission element; and At least one second connector is disposed at the second end, and each of the second connectors is electrically connected or coupled to at least one of the third signal transmission components.

12. A communication device, characterized in that: The communication device comprises the filter according to any one of claims 1 to 11.

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