Filter and communication device

Abstract

The application relates to a filter and a communication device. The filter comprises a cavity, a cover plate and a flying rod. The cover plate is arranged on the cavity, and the cover plate is provided with a through hole penetrating through the cover plate along the thickness direction of the cover plate. The flying rod is detachably arranged in the cavity, and the flying rod can be arranged into or taken out of the cavity through the through hole. When the flying rod needs to be replaced or assembled, the cover plate does not need to be disassembled, and the flying rod can be directly taken out of the cavity through the through hole. After the flying rod is adjusted or replaced according to requirements, the flying rod can be directly arranged into the cavity through the through hole. Therefore, the flying rod does not need to be disassembled when the flying rod is replaced or assembled, so that the disassembly and replacement efficiency of the flying rod can be improved, and deformation caused by disassembly of the cover plate can be avoided, so that the product performance can be guaranteed. In addition, the scrap rate of components can be reduced, so that the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, and in particular to a filter and communication device. Background Technology

[0002] As a critical frequency-selective device, the filter is an indispensable core component in modern communication systems, and its performance directly affects the quality and efficiency of the communication system. With the development of 5G technology, mobile terminals and base station equipment have placed higher demands on filters in terms of size, cost, electrical performance, and production efficiency. Filter design therefore faces multiple severe challenges, including miniaturization, low cost, high stability, and high-efficiency mass production. In traditional filter design, cross-coupling is often used to effectively improve out-of-band rejection performance. One specific implementation method is to add a boom structure to the filter cavity. This structure can flexibly generate transmission zeros near the passband, thereby significantly improving the filter's out-of-band rejection capability.

[0003] In filter manufacturing, the fly rod is typically pressed into an insulating medium and then installed within the cavity. The filter cover is usually sealed using two methods: screw fixing or solder paste welding. However, in actual production, mismatched fly rod lengths often necessitate readjustment of the coupling strength, requiring the cover to be removed to adjust the fly rod.

[0004] If screws are used to fix the cover plate, although disassembly is relatively simple, repeated disassembly and assembly not only affects production efficiency, but also easily causes deformation of the cover plate due to repeated pressure, affecting structural integrity and shielding effect, reducing product performance, and resulting in low assembly efficiency.

[0005] If solder paste is used for sealing, the disassembly process becomes extremely difficult. Heating is required to melt the solder paste before the cavity can be opened, and residual solder paste easily adheres to the surface of the cavity and cover plate, and may even flow into the cavity. Once solidified, it is difficult to remove completely, which seriously affects the flatness and reusability of the cavity and cover plate, often leading to component scrapping, higher costs, and low assembly efficiency. Summary of the Invention

[0006] Therefore, it is necessary to address the shortcomings of existing technologies by providing a filter and communication device that can effectively solve the disassembly and assembly problems when the fly rod size is mismatched, while ensuring the performance of the filter, achieving rapid, stable, and high-yield mass production, and taking into account reasonable control of production costs.

[0007] On one hand, this application provides a filter, the filter comprising:

[0008] cavity;

[0009] A cover plate, wherein the cover plate is installed in the cavity, the cover plate having a through hole extending through the cover plate along its thickness direction; and

[0010] The fly stick is detachably mounted in the cavity, and the fly stick can be inserted into the cavity through the through hole or removed from the cavity.

[0011] In one embodiment, the projected profile of the fly rod on the cover plate along the thickness direction of the cover plate is adapted to the shape of the through hole.

[0012] In one embodiment, the fly rod is plate-shaped, and the through hole is configured as a waist-shaped hole or a strip-shaped hole.

[0013] In one embodiment, the filter further includes an insulating support, the cavity has a coupling window, the insulating support is disposed at the coupling window, and the fly rod is detachably disposed on the insulating support.

[0014] In one embodiment, the insulating support base is grounded at the coupling window.

[0015] In one embodiment, the insulating support base is provided with a first retaining portion on each of its opposite sides along the width direction, and the coupling window is provided with a second retaining portion on each of its opposite sides along the width direction; each of the first retaining portions and each of the second retaining portions engages with each other.

[0016] In one embodiment, the fly rod is grounded on the insulating support base.

[0017] In one embodiment, the insulating support base is provided with a first locking interface, which extends from the top of the insulating support base toward a direction away from the fly stick, and the fly stick is locked and fixed to the insulating support base through the first locking interface; and / or, the fly stick is provided with a second locking interface, which extends from the bottom of the fly stick toward a direction away from the insulating support base, and the fly stick is locked and fixed to the insulating support base through the second locking interface.

[0018] In one embodiment, the filter further includes a fastener detachably mounted on the cover plate, the fastener engaging with the fly rod along the thickness direction of the cover plate.

[0019] In one embodiment, there are two fasteners, which abut against each other on opposite sides of the fly rod along the width direction.

[0020] In one embodiment, the top of the boom has a step on either side along the width direction, and the fastener abuts against the step along the thickness direction of the cover plate, and the fastener also abuts against the step along the width direction.

[0021] In one embodiment, the fastener is a screw or bolt, and the cover plate has a threaded hole adapted to the fastener, the fastener being disposed in the threaded hole.

[0022] In one embodiment, the stick is a circuit board.

[0023] In one embodiment, the circuit board includes a substrate and a conductive layer connected to the substrate. When the area and / or thickness of the conductive layer is adjusted, the coupling between two adjacent resonators can be adjusted.

[0024] In one embodiment, the conductive layer includes a first conductive portion disposed on any one side or opposite sides of the substrate along its thickness direction.

[0025] In one embodiment, the conductive layer further includes a second conductive portion disposed on any one side or opposite sides of the substrate along its width direction, and the second conductive portion is electrically connected to the first conductive portion; and / or,

[0026] The conductive portion further includes a third conductive portion, which is disposed on any one side or two opposite sides of the substrate along its thickness direction. The third conductive portion is located at any one edge or two opposite edge portions along the width direction of the side of the substrate, and the third conductive portion is electrically connected to the first conductive portion.

[0027] In one embodiment, the conductive layer is symmetrically disposed on the substrate.

[0028] In one embodiment, the cavity is provided with at least two resonant cavities, and the filter further includes at least two resonators, each of the resonators being correspondingly disposed in each of the resonant cavities; the fly rod is disposed between the resonators of two adjacent resonant cavities.

[0029] On the other hand, this application also provides a communication device, which includes the aforementioned filter.

[0030] When the aforementioned filters and communication equipment require replacement or assembly of the fly rod, it is not necessary to remove the cover plate. The fly rod can be directly removed from the cavity through the through hole. After adjustment or replacement as needed, the fly rod can be directly inserted into the cavity through the through hole. Therefore, the fly rod replacement or assembly operation does not require removing the cover plate, which improves the efficiency of fly rod disassembly and replacement and avoids deformation caused by cover plate removal, thus ensuring product performance. Furthermore, it reduces the scrap rate of components, thereby lowering costs. Attached Figure Description

[0031] Figure 1 This is a structural diagram of a filter according to an embodiment of this application.

[0032] Figure 2 for Figure 1 The filter's decomposed structure diagram is shown.

[0033] Figure 3 This is a structural diagram of a filter in an embodiment of this application, showing the fly rod mounted on the cover plate.

[0034] Figure 4 This is a structural diagram showing the connection between the fly rod and the insulating support base in a filter according to an embodiment of this application.

[0035] Figure 5 This is a structural diagram of the fly rod in the filter of the first embodiment of this application.

[0036] Figure 6 This is a structural diagram of the fly rod in the filter of the second embodiment of this application.

[0037] Figure 7 This is a structural diagram of the fly rod in the filter according to the third embodiment of this application.

[0038] Figure 8 This is a structural diagram of the fly rod in the filter of the fourth embodiment of this application.

[0039] Figure 9 This is a structural diagram of the fly rod in the filter according to the fifth embodiment of this application.

[0040] 10. Cavity; 11. Resonant cavity; 12. Coupling window; 121. Second retaining part; 20. Cover plate; 21. Through hole; 22. Threaded hole; 30. Flying rod; 31. Substrate; 32. Conductive layer; 321. First conductive part; 322. Second conductive part; 323. Third conductive part; 33. Step; 34. Protrusion; 35. Second card interface; 40. Resonator; 50. Connector; 60. Tuning component; 70. Insulating support; 71. First retaining part; 72. First card interface; 80. Fastener. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] As described in the background section, in existing technologies, when the flybar of a filter needs to be replaced, the cover plate must be disassembled before the flybar can be replaced, resulting in low assembly efficiency. Moreover, during the disassembly and assembly of the cover plate, either deformation can easily occur, leading to a decrease in product performance, or residual solder paste can easily adhere to the surface of the cavity and cover plate, or even flow into the cavity. After solidification, it is difficult to completely remove, seriously affecting the flatness and reusability of the cavity and cover plate, often leading to component scrapping and high costs.

[0043] Based on the above reasons, this application provides a filter and communication device that can effectively solve the disassembly and assembly problem when the fly rod size is mismatched, while ensuring the performance of the filter, and achieve rapid, stable and high-yield mass production, while taking into account the reasonable control of production costs.

[0044] See Figures 1 to 3 One embodiment of this application provides a filter, which may specifically be a simplexer, duplexer, splitter, combiner, or tower-top amplifier, etc., and is not limited thereto.

[0045] Specifically, the filter includes a cavity 10, a cover plate 20, and a flybar 30.

[0046] For example, the cavity 10 may be, but is not limited to, a metal component, specifically made of various metal materials such as copper, aluminum, iron, or stainless steel. Of course, the cavity 10 may also include a dielectric material, and for example, a metal layer may be provided on both the inner and outer walls of the dielectric material.

[0047] For example, cover plate 20 is installed in cavity 10. Cover plate 20 and cavity 10 can be detachably connected or non-detachably connected, and this is not limited here. When cover plate 20 and cavity 10 are detachably connected, cover plate 20 and cavity 10 can be fixedly connected by mounting parts such as pins, screws or clips, or by soldering, or by various other methods.

[0048] For example, the cover plate 20 is provided with a through hole 21, which extends through the cover plate 20 along its thickness direction. The flying rod 30 is detachably installed in the cavity 10, and the flying rod 30 can be inserted into the cavity 10 through the through hole 21 or removed from the cavity 10.

[0049] When the aforementioned filter needs to be replaced or reassembled, the fly rod 30 does not need to be disassembled. The fly rod 30 can be directly removed from the cavity 10 through the through hole 21. After adjustment or replacement as needed, the fly rod 30 can be directly inserted into the cavity 10 through the through hole 21. Therefore, the replacement or reassembly of the fly rod 30 does not require disassembling the cover plate 20, improving the efficiency of disassembly and replacement, and avoiding deformation caused by disassembly of the cover plate 20, thus ensuring product performance. Furthermore, it reduces the scrap rate of components, thereby lowering costs.

[0050] For example, cavity 10 has at least two resonant cavities 11. The filter also includes resonators 40. At least two resonators 40 are provided. The number of resonators 40 is the same as the number of resonant cavities 11. Each resonator 40 is correspondingly disposed in each resonant cavity 11. The specific number of resonators 40 and resonant cavities 11 is not limited, and can be 2, 3, 4, 8, 10, or 20, etc. Figures 1 to 3 As shown, in one embodiment, the number of resonators 40 and resonant cavities 11 in the filter is, for example, set to eight, but this is not a limitation. It is understood that the number of resonators 40 and resonant cavities 11 in the filter can also be set to various other numbers.

[0051] The type of resonator 40 can be either a metal resonator or a dielectric resonator, and there is no limitation on this. The types of all resonators 40 can be the same, for example, all of them can be metal resonators or all of them can be dielectric resonators; of course, the types of all resonators 40 can also be different, for example, some of them can be set as metal resonators and others as dielectric resonators.

[0052] For example, the specific number of 30 sticks may include, but is not limited to, 1, 2, 3 or other numbers. The specific number can be flexibly adjusted and set according to actual needs, and is not limited here.

[0053] For example, the fly rod 30 can be positioned between any two adjacent resonant cavities 11, serving to adjust the coupling amount between the resonators 40 within the two adjacent resonant cavities 11. It is understood that the specific placement of the fly rod 30 in this application is not limited. A coupling window 12 is provided between the two adjacent resonant cavities 11. The fly rod 30 is mounted on the coupling window 12, and its opposite sides are directly or electrically connected to the resonators 40 within the two adjacent resonant cavities 11. Specifically, one side of the fly rod 30 extends into one of the resonant cavities 11 and is electrically or directly connected to the resonator 40; the other side of the fly rod 30 extends into the other resonant cavity 11 and is electrically or directly connected to the resonator 40.

[0054] For example, the filter also includes a connector 50. The connector 50 is connected to the cavity 10.

[0055] The connector 50 includes an inner core, an outer conductor, and an insulating component. The outer conductor is sleeved outside the inner core and is electrically connected to the cavity 10 to achieve grounding. The outer conductor is specifically mounted on the side wall of the cavity 10. The inner core extends into the cavity 10. The insulating component is disposed between the inner core and the outer conductor to prevent short circuits caused by electrical connection between the outer conductor and the inner core.

[0056] Optionally, there are two connectors 50, one as a signal input port and the other as a signal output port. The signal is input to the filter from one of the connectors 50, filtered, and then output through the other connector 50.

[0057] It should be noted that in this embodiment, direct electrical connection between the two components refers to the two components being in direct physical electrical contact or connected as a single unit, thereby enabling direct conductivity. In other words, there is no insulating gap between the two components. Specifically, the two components may be connected by welding or by using conductive connectors to achieve direct electrical connection. In this embodiment, coupled electrical connection between the two components refers to the two components not being in direct physical electrical contact, but having a physical gap, thereby achieving coupled power supply.

[0058] Please see Figures 1 to 3 For example, the filter also includes a tuning element 60. The tuning element 60 is positionally adjustable on the cover plate 20 along its thickness direction. The number of tuning elements 60 is, for example, one, two, three, ten, or more, and is not limited herein. The tuning element 60 includes, but is not limited to, a tuning screw or tuning rod. When the depth of the tuning element 60 inserted into the cavity 10 is adjusted, the strength of the cross-coupling can be finely adjusted accordingly, thereby improving product performance.

[0059] For example, the tuner 60 can be positioned either corresponding to the resonator 40 or between two adjacent resonators 40. In some embodiments, when the tuner 60 is positioned between two adjacent resonators 40, the flybar 30 is not provided in the area between the two resonators 40 to avoid interference with the tuner 60 or even short-circuit risks caused by electrical contact. Conversely, when the flybar 30 is provided between two adjacent resonators 40, the tuner 60 is not required in the area between the two resonators 40.

[0060] Please see Figures 1 to 3For example, the projection profile of the fly rod 30 on the cover plate 20 along the thickness direction of the cover plate 20 is adapted to the shape of the through hole 21. In this way, on the one hand, the fly rod 30 can pass through the through hole 21 and enter and exit the cavity 10 along the thickness direction of the cover plate 20; on the other hand, the size of the through hole 21 can be designed to be small, avoiding the through hole 21 being too large and affecting the electrical performance.

[0061] Optionally, in this embodiment, the fly rod 30 is plate-shaped, and the through hole 21 is correspondingly configured as an oblong hole or a strip-shaped hole. In this way, the fly rod 30 can be easily installed into the cavity 10 or removed from the cavity 10.

[0062] Of course, as some optional solutions, the fly rod 30 can also be set in a columnar shape. The axial cross-sectional shape of the fly rod 30 includes, but is not limited to, regular shapes such as rectangles or circles and other irregular shapes. The shape of the through hole 21 is correspondingly, for example, regular shapes such as rectangles or circles and other irregular shapes.

[0063] Please see Figures 6 to 9 In any example, the fly stick 30 may be, but is not limited to, a circuit board. The circuit board may be a single-layer board, a double-layer board, or a multi-layer board; no limitation is made here. Specifically, the fly stick 30 includes a substrate 31 and a conductive layer 32. The conductive layer 32 is connected to the substrate 31. The substrate 31, as the main body of the circuit board, can be made of various insulating dielectric materials according to actual needs. For example, the substrate 31 may be made of ceramic material, and the circuit board will be a ceramic circuit board accordingly; furthermore, the material of the substrate 31 may also be FR-4, FR-2, CEM-1, CEM-3, etc., without limitation. Among these, FR-4 is the most commonly used material, made with epoxy resin as a binder and fiberglass cloth as a reinforcing material. FR-4 has good insulation properties, mechanical strength, and heat resistance, and can withstand high temperatures and pressures, therefore it is widely used in various electronic devices. FR-2 is suitable for some simple low-voltage, low-frequency circuits; its performance is slightly inferior to FR-4, but its cost is lower. CEM-1 and CEM-3 materials are made from paper pulp or wood pulp as the base material and are produced by impregnating with resin, resulting in lower costs.

[0064] When the flying rod 30 is a multi-layer board, the conductive layer 32 can be disposed inside the multi-layer board, or on the outer surface of the multi-layer board, or the conductive layer 32 can be disposed on both the inner and outer surfaces of the multi-layer board.

[0065] Specifically, adjusting the area and / or thickness of the conductive layer 32 can adjust the coupling between two adjacent resonators 40. Specifically, increasing the area of ​​the conductive layer 32 increases the coupling between two adjacent resonators 40; conversely, decreasing the area of ​​the conductive layer 32 decreases the coupling between two adjacent resonators 40. Similarly, increasing the thickness of the conductive layer 32 increases the coupling between two adjacent resonators 40; conversely, decreasing the thickness of the conductive layer 32 decreases the coupling between two adjacent resonators 40.

[0066] Optionally, the conductive layer 32 may be made of various metal materials such as copper, silver, gold, aluminum, and stainless steel.

[0067] Please see Figures 5 to 9 Based on the aforementioned embodiments, the conductive layer 32 includes a first conductive portion 321. Optionally, the first conductive portion 321 is disposed on any side of the substrate 31 along its thickness direction, and extends along the width direction of the substrate 31, for example, extending to the side edge of the substrate 31. To improve the coupling amount, specifically, there are two first conductive portions 321, respectively disposed on opposite sides of the substrate 31 along its thickness direction, and each of the two first conductive portions 321 extends along the width direction of the substrate 31, for example, extending to the side edge of the substrate 31. Wherein, the width direction is as follows... Figure 5 As indicated by the arrow W in the diagram.

[0068] Based on the aforementioned embodiments, the conductive layer 32 further includes a second conductive portion 322. The second conductive portion 322 is disposed on any one side or opposite sides of the substrate 31 along its width direction. The second conductive portion 322 is electrically connected to the first conductive portion 321. Thus, by adding the second conductive portion 322, the area of ​​the conductive layer 32 can be increased, thereby increasing the coupling amount.

[0069] Optionally, the second conductive portion 322 extends along the length of the substrate 31. Furthermore, the extension length of the second conductive portion 322 along the length of the substrate 31 can be flexibly adjusted according to actual needs. Thus, the coupling amount can be adjusted by adjusting the length of the second conductive portion 322, and the adjustment of the coupling amount is significant. The length direction is as follows... Figure 5 As indicated by arrow L in the diagram.

[0070] Please see Figure 8 and Figure 9Based on the aforementioned embodiments, the conductive portion further includes a third conductive portion 323. The third conductive portion 323 is disposed on any one side or opposite sides of the substrate 31 along its thickness direction. The third conductive portion 323 is located at any one edge or opposite edges of the side of the substrate 31 along its width direction. The third conductive portion 323 is electrically connected to the first conductive portion 321. Optionally, the third conductive portion 323 extends along the length direction of the substrate 31, and the length of the third conductive portion 323 can be flexibly adjusted and set according to actual needs.

[0071] For example, the conductive layer 32 is symmetrically disposed on the substrate 31. This facilitates the adjustment of the coupling amount. Of course, in some alternative solutions, the conductive layer 32 does not need to be symmetrically disposed.

[0072] Please see Figures 2 to 4 For example, the filter also includes an insulating support 70. The cavity 10 has a coupling window 12. The coupling window 12 is located between two adjacent resonant cavities 11. The insulating support 70 is disposed on the coupling window 12, and the fly rod 30 is detachably disposed on the insulating support 70. The fly rod 30 passes through the coupling window 12, and its two opposite sides along the width direction extend into the two adjacent resonant cavities 11 respectively, realizing mutual coupling between the resonators 40 in the two adjacent resonant cavities 11, used to adjust the coupling amount between the two resonators 40. The insulating support 70 can bear and support the fly rod 30, improving the stability of the fly rod 30 within the cavity 10; furthermore, the insulating support 70 serves an insulating function, preventing the fly rod 30 from making electrical contact with the cavity 10 and causing a short circuit.

[0073] For example, the insulating support base 70 is clamped to the coupling window 12. The insulating support base 70 has a first retaining portion 71 on each opposite side along its width, and the coupling window 12 has a second retaining portion 121 on each opposite side along its width. The first retaining portions 71 and the second retaining portions 121 engage in a latching fit. Optionally, the first retaining portion 71 may be, for example, a slot, and the second retaining portion 121 may be a retaining block adapted to the slot. Alternatively, the first retaining portion 71 may be, for example, a retaining block, and the second retaining portion 121 may have a slot adapted to the retaining block.

[0074] Please see Figures 2 to 4For example, the fly stick 30 is grounded and mounted on the insulating support base 70. This facilitates the installation and removal of the fly stick 30. Optionally, the insulating support base 70 is provided with a first locking interface 72, through which the fly stick 30 is locked and fixed to the insulating support base 70. To further improve the installation stability of the fly stick 30 on the insulating support base 70, the fly stick 30 is provided with a second locking interface 35. The fly stick 30 is locked and fixed to the insulating support base 70 through the second locking interface 35. The first locking interface 72 is located at the top of the insulating support base 70, that is, extending from the wall surface of the insulating support base 70 facing the fly stick 30 in a direction away from the fly stick 30. The second locking interface 35 is located at the bottom of the fly stick 30, that is, extending from the wall surface of the fly stick 30 facing the insulating support base 70 in a direction away from the insulating support base 70.

[0075] Please see Figures 2 to 4 For example, the filter also includes fasteners 80. Fasteners 80 include, but are not limited to, screws, pins, rivets, or snap-fit ​​components. Fasteners 80 are detachably mounted on the cover plate 20 and abut against the fly rod 30 along the thickness direction of the cover plate 20. Thus, the fastening effect of the fasteners 80 improves the installation stability of the fly rod 30 within the cavity 10.

[0076] It should be noted that the number of fasteners 80 includes, but is not limited to, one, two, three, or any other arbitrary number. In this embodiment, optionally, there are two fasteners 80, and the two fasteners 80 abut against each other on opposite sides of the fly rod 30 along the width direction.

[0077] Based on the aforementioned embodiment, a step 33 is provided on either side of the top of the boom 30 along the width direction. The fastener 80 abuts against the step 33 along the thickness direction of the cover plate 20, and the fastener 80 also abuts against the step 33 along the width direction. Thus, the fastener 80 can position the boom 30 in both the vertical and width directions, improving the stability of the boom 30.

[0078] Based on the aforementioned embodiment, the top of the fly rod 30 has steps 33 on both opposite sides along the width direction. Two fasteners 80 are provided. Each fastener 80 abuts against each step 33. Both fasteners 80 abut against the fly rod 30 along the thickness direction of the cover plate 20, and both fasteners 80 also abut against the fly rod 30 along the width direction of the cover plate 20. This ensures that the fly rod 30 is stably installed within the cavity 10.

[0079] Please see Figure 3 and Figure 4In some embodiments, the top center portion of the fly stick 30 is provided with a protrusion 34. The protrusion 34 passes through the through hole 21 and, for example, extends out of the cavity 10 from the through hole 21. In this way, when the protrusion 34 extends out of the cavity 10, it facilitates the assembly and disassembly of the fly stick 30.

[0080] It should be noted that the "protrusion 34" in this embodiment can be a part of the "fly stick 30", that is, the "protrusion 34" is integrally formed with the "other parts of the fly stick 30"; or it can be an independent component that can be separated from the "other parts of the fly stick 30", that is, the "protrusion 34" can be manufactured independently and then combined with the "other parts of the fly stick 30" to form a whole.

[0081] In one specific embodiment, the fastener 80 is a screw or bolt, and the cover plate 20 is provided with a threaded hole 22 adapted to the fastener 80. The fastener 80 is disposed in the threaded hole 22. In this way, the fastener 80 is detachably installed on the cover plate 20 by means of a threaded connection, which facilitates the installation and removal of the fastener 80 on the cover plate 20.

[0082] Specifically, the threaded hole 22 communicates with the through hole 21. Alternatively, the threaded hole 22 can be understood as part of the through hole 21, specifically located, for example, on any side of the through hole 21 along the width direction of the cover plate 20. After removing the fastener 80, the fly rod 30 can smoothly pass through the through hole 21 and the threaded hole 22 for assembly without interfering with the cover plate 20 along its thickness direction.

[0083] In another embodiment, this application also provides a communication device, which includes the filter of any of the above embodiments.

[0084] In the aforementioned communication equipment, when the fly rod 30 needs to be replaced or reassembled, it is not necessary to remove the cover plate 20. The fly rod 30 can be directly removed from the cavity 10 through the through hole 21. After the fly rod 30 is adjusted or replaced as needed, it can be directly inserted into the cavity 10 through the through hole 21. Therefore, the replacement or reassembly of the fly rod 30 does not require removing the cover plate 20, which improves the efficiency of disassembly and replacement and avoids deformation caused by removing the cover plate 20, thus ensuring product performance. Furthermore, it reduces the scrap rate of components, thereby lowering costs.

[0085] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0086] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0087] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0088] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0089] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A filter, characterized in that, The filter includes: A cavity, wherein the cavity is provided with a coupling window; A cover plate is installed in the cavity. The cover plate has a through hole that penetrates the cover plate along its thickness direction. The through hole is either a slotted hole or a strip-shaped hole. An insulating support base is disposed at the coupling window; and The fly stick is detachably mounted on the insulating support base. The fly stick is plate-shaped and can be inserted into the cavity through the through hole or removed from the cavity.

2. The filter according to claim 1, characterized in that, The insulating support base is grounded at the coupling window.

3. The filter according to claim 2, characterized in that, The insulating support base is provided with a first retaining part on each of its opposite sides along the width direction, and the coupling window is provided with a second retaining part on each of its opposite sides along the width direction; each of the first retaining parts and each of the second retaining parts engages with each other.

4. The filter according to claim 1, characterized in that, The fly rod grounding device is installed on the insulating support base.

5. The filter according to claim 4, characterized in that, The insulating support base is provided with a first locking interface, which extends from the top of the insulating support base toward a direction away from the fly rod, and the fly rod is locked and fixed to the insulating support base through the first locking interface; and / or, the fly rod is provided with a second locking interface, which extends from the bottom of the fly rod toward a direction away from the insulating support base, and the fly rod is locked and fixed to the insulating support base through the second locking interface.

6. The filter according to claim 1, characterized in that, The filter also includes fasteners that are detachably mounted on the cover plate and engage with the fly rod along the thickness direction of the cover plate.

7. The filter according to claim 6, characterized in that, There are two fasteners, and the two fasteners abut against each other on opposite sides of the flying rod along the width direction.

8. The filter according to claim 6, characterized in that, The top of the fly stick has a step on either side along the width direction, and the fastener abuts against the step along the thickness direction of the cover plate. The fastener also abuts against the step along the width direction.

9. The filter according to claim 6, characterized in that, The fastener is a screw or bolt, and the cover plate has a threaded hole adapted to the fastener, with the fastener disposed in the threaded hole.

10. The filter according to claim 1, characterized in that, The flying stick is a circuit board.

11. The filter according to claim 10, characterized in that, The circuit board includes a substrate and a conductive layer. The conductive layer is connected to the substrate. When the area and / or thickness of the conductive layer is adjusted, the coupling between two adjacent resonators can be adjusted.

12. The filter according to claim 11, characterized in that, The conductive layer includes a first conductive portion, which is disposed on any one side or opposite two sides of the substrate along its thickness direction.

13. The filter according to claim 12, characterized in that, The conductive layer further includes a second conductive portion, which is disposed on any one side or opposite sides of the substrate along its width direction, and is electrically connected to the first conductive portion; and / or, The conductive portion further includes a third conductive portion, which is disposed on any one side or two opposite sides of the substrate along its thickness direction. The third conductive portion is located at any one edge or two opposite edge portions along the width direction of the side of the substrate, and the third conductive portion is electrically connected to the first conductive portion.

14. The filter according to any one of claims 11 to 13, characterized in that, The conductive layer is symmetrically disposed on the substrate.

15. The filter according to claim 1, characterized in that, The cavity is provided with at least two resonant cavities, and the filter further includes at least two resonators, each of which is correspondingly disposed in each of the resonant cavities; the flying rod is disposed between the resonators of two adjacent resonant cavities.

16. A communication device, characterized in that, The communication device includes a filter as described in any one of claims 1 to 15.

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