Lower end cover of antenna assembly, antenna assembly and base station system

Abstract

The utility model relates to the technical field of antennas, and discloses a lower end cover of an antenna assembly, the antenna assembly and a base station system. A lower end cover of the antenna assembly comprises a panel and a side wall, and the side wall is connected with the panel and extends in the circumferential direction of the panel, so that a first cavity with an opening facing a first direction is defined by the side wall and the panel; wherein an annular groove surrounding the first cavity is formed in the side wall, an opening of the annular groove faces the first direction, and a housing for inserting an antenna assembly is arranged in the annular groove; wherein the height of the inner side wall of the annular groove is larger than that of the outer side wall of the annular groove, and a water leakage hole is formed in the bottom wall of the annular groove. Therefore, when the antenna assembly encounters a rainy environment, rainwater flows into the annular groove along the housing and flows out of the water leakage holes, if the annular groove is filled with water at a too high speed, the water overflows from the lower outer side wall before the water overflows from the inner side wall, so that the water does not enter the housing, and the water leakage is avoided. The waterproof performance of the antenna assembly is improved, and the overall structure of the antenna assembly is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, in particular to a lower end cover of an antenna assembly, an antenna assembly and a base station system. BACKGROUND

[0002] The antenna assembly (for example, the antenna assembly of a base station) mainly comprises an upper end cover, a lower end cover, a cover shell and a radio frequency module. The radio frequency module has the function of transmitting and receiving radio frequency signals and is the main functional component of the antenna assembly. The radio frequency module can be arranged in the cover shell to be protected by the cover shell, for example, waterproof and dustproof.

[0003] The antenna assembly is usually installed in an outdoor environment. In order to ensure the safety performance of the radio frequency module, a waterproof component is usually additionally installed on the lower end cover at present. However, the arrangement of the waterproof component increases the structural complexity of the antenna assembly and limits the improvement of the structural integration of the antenna assembly. Therefore, how to reduce the number and complexity of components in the antenna assembly and simplify the overall structure of the antenna assembly under the premise of ensuring the safety performance of the radio frequency module is a problem to be solved at present. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a lower end cover of an antenna assembly, an antenna assembly and a base station system to reduce the number and complexity of components in the antenna assembly and simplify the overall structure of the antenna assembly under the premise of ensuring the safety performance of the radio frequency module.

[0005] In a first aspect, the present application provides a lower end cover of an antenna assembly. The lower end cover comprises a panel and a side wall. The side wall is connected with the panel and extends along the circumference of the panel to form a first cavity with the panel, the first cavity being open to a first direction. An annular groove is formed in the side wall and surrounds the first cavity. The annular groove is open to the first direction, and the annular groove is used for inserting a cover shell of the antenna assembly. The height of the inner side wall of the annular groove is greater than the height of the outer side wall of the annular groove. A water leakage hole is formed in the bottom wall of the annular groove.

[0006] According to the above-mentioned embodiments, since the antenna assembly is placed in an outdoor environment, when it rains or condensate water is generated in the outdoor environment, the water flow can flow downward along the outer surface of the cover shell into the annular groove and flow out through the water leakage hole. When the water flow is too fast and fills the annular groove, the water flow will overflow from the lower outer side wall before overflowing from the inner side wall, so that the water flow does not overflow from the inner side wall and contact the radio frequency module. Therefore, the structure of the above-mentioned lower end cover can realize the waterproof function of the antenna assembly without setting an additional waterproof component, thereby simplifying the overall structure of the antenna assembly and improving the structural integration of the antenna assembly.

[0007] In some embodiments of the above-mentioned first aspect, the diameter of the water leakage hole is greater than or equal to 2 mm. For example, the diameter of the water leakage hole can be 2 mm, 2.2 mm, 2.5 mm, etc.

[0008] It is understandable that by setting the diameter of the drainage hole to be greater than or equal to 2mm, the surface tension of the water droplets can be overcome, allowing the water to flow out of the drainage hole more smoothly. This increases the speed at which the water flows out of the drainage hole, thereby reducing the probability of water filling the annular groove and further improving the waterproof capability of the antenna assembly.

[0009] In some embodiments of the first aspect described above, the height difference between the inner and outer sidewalls can be greater than or equal to 3 mm. For example, the height difference between the inner and outer sidewalls can be 3 mm, 3.5 mm, 4 mm, or 5 mm, etc. Since the extension direction of the casing can be perpendicular or nearly perpendicular to the ground, setting the height difference to greater than or equal to 3 mm not only ensures that the inner sidewall protrudes beyond the outer sidewall when the opening of the annular groove is perpendicular to the ground, but also ensures that the inner sidewall still protrudes beyond the outer sidewall when the opening of the annular groove is nearly perpendicular to the ground, thereby ensuring the waterproof effect of the sidewalls.

[0010] In some embodiments of the first aspect described above, the thickness of the bottom wall can be greater than or equal to 1.5 mm; the thickness of the inner wall can be greater than or equal to 1.5 mm; and the thickness of the outer wall can be greater than or equal to 1.5 mm. Furthermore, the thickness of the bottom wall, the inner wall, and the outer wall can be the same or different; for example, they can all be 1.5 mm, etc.

[0011] In some embodiments of the first aspect described above, there are multiple drainage holes, which are arranged sequentially at intervals along the circumference of the annular groove.

[0012] In this way, multiple drainage holes can promptly drain water flowing from the circumferential surface of the casing into the annular groove and out of the lower end cover, thereby coping with water flow entering the annular groove from different directions and further improving the waterproof capability of the antenna assembly.

[0013] In some embodiments of the first aspect described above, the lower end cover further includes a mounting plate, which is connected to the panel or to the sidewall, and the panel and the mounting plate are stacked sequentially along the first direction; the mounting plate is provided with at least one mounting hole for mounting a feeder and a connector; the panel is provided with at least one through hole, and the at least one mounting hole and the at least one through hole correspond one-to-one; the projection of the through hole along the first direction on the first plane covers the projection of the corresponding mounting hole along the first direction on the first plane, and the first plane is perpendicular to the first direction.

[0014] In some embodiments of the first aspect described above, the mounting plate includes a metal portion for connection to the reflector of the antenna assembly; wherein mounting holes are provided on the metal portion.

[0015] In this way, the mounting hole can be matched with the connector fastener to fix the connector on the mounting plate. Since the connector fastener is also made of conductive material, when the connector is mounted on the mounting plate, the connector fastener can be electrically connected with the mounting plate, the reflector plate of the antenna assembly is also mounted on the metal part of the mounting plate, that is, the mounting plate and the reflector plate can also be electrically connected, and the reflector plate can also be electrically connected through the metal fixing part and the bracket of the antenna assembly, and can be grounded through the guyed tower connected with the bracket, so that the mounting and grounding functions of the connector are realized, the metal grounding sheet is saved, the overall structure of the antenna assembly is simplified, and the structural integration of the antenna assembly is improved.

[0016] In some embodiments of the first aspect, the material of the side wall can be plastic material, and the plastic forming process can be injection molding, die pressing or the like; the material of the panel can be plastic material, modified plastic material or composite material, and the composite material can be polymer composite material; the material of the mounting plate can be conductive material, for example, sheet metal material, which can be aluminum / iron alloy or processed material based on aluminum / iron alloy. It should be noted that the specific material of the side wall, the panel and the mounting plate is not limited in the present application, and a suitable material can be selected according to actual needs by those skilled in the art.

[0017] In some embodiments of the first aspect, the thickness of the panel can range from 0.1 to 2.0 mm, for example, the thickness of the panel can be 0.1 mm, 0.5 mm, 1.0 mm, 1.5 mm or 2.0 mm, etc.; the thickness of the mounting plate can range from 1.0 to 3.0 mm, for example, the thickness of the mounting plate can be 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm or 3.0 mm, etc. It should be noted that the specific thickness range of the panel and the mounting plate is not limited in the present application, and a suitable thickness can be selected according to actual needs by those skilled in the art.

[0018] In some embodiments of the first aspect, the surface of the panel away from the first direction is marked with frequency band information of the feed line and the connector.

[0019] It can be understood that the frequency band information can also be referred to as radio frequency identification, and the frequency band information can be arranged near the corresponding connector, wherein the frequency band information corresponding to different connectors can be the same or different. Therefore, the arrangement of the frequency band information can facilitate the workers to distinguish the frequency bands of different connectors and corresponding feed lines.

[0020] In some embodiments of the first aspect, the number of frequency band information is one or more, and the frequency band information can correspond to the connector one by one. In some embodiments, the shape of the area occupied by the frequency band information can be rectangular, triangular, rhombic, or the like; the frequency band information can be printed on the appearance surface of the lower end cover by silk-screen printing, water printing, ultraviolet printing, or the like. It should be noted that the shape and printing method of the frequency band information are not limited in the present application.

[0021] In some embodiments of the first aspect, the mounting plate further comprises a mounting portion for mounting a remote control unit of the antenna assembly; the panel further comprises a relief hole for avoiding the remote control unit mounted on the mounting plate.

[0022] In some embodiments of the first aspect, the side wall further comprises an annular flange, the inner side wall surrounds and is connected to the annular flange, and the panel is connected to the annular flange.

[0023] In some embodiments of the first aspect, the lower end cover further comprises a first fastener, the annular flange, the panel, and the mounting plate are respectively provided with a first fastening hole, a second fastening hole, and a third fastening hole, and the first fastener sequentially penetrates the first fastening hole, the second fastening hole, and the third fastening hole.

[0024] In some embodiments of the first aspect, one or more weight reduction holes are further provided on the mounting plate to reduce the weight of the mounting plate and improve the light performance of the lower end cover. The specific position of the weight reduction hole is not limited in the present application.

[0025] In the second aspect, the present application provides an antenna assembly, which comprises a radio frequency module, a housing, and the lower end cover described in the first aspect. The radio frequency module is located in the housing, and the bottom of the housing is inserted into the annular groove of the lower end cover.

[0026] In some embodiments of the second aspect, the radio frequency module comprises a remote control unit, and the remote control unit is mounted on the mounting portion of the lower end cover.

[0027] In the third aspect, the present application provides a base station system, which comprises the antenna assembly, the connector, the feeder, and the baseband processing unit described in the first aspect. The connector is electrically connected to the lower end cover of the antenna assembly and the feeder, respectively, and the feeder is electrically connected to the baseband processing unit.

[0028] The beneficial effects of the second and third aspects described above can be referred to the related description in various embodiments of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the present application, the drawings used in the embodiments will be briefly introduced as follows.

[0030] Figure 1 According to some embodiments of the present application, a structural framework diagram of a base station system is shown.

[0031] Figure 2 According to some embodiments of the present application, a specific structural diagram of a radio frequency module and a connector is shown.

[0032] Figure 3 According to some embodiments of the present application, a three-dimensional structural diagram of a lower end cover of an antenna assembly is shown.

[0033] Figure 4A According to some embodiments of the present application, a three-dimensional structural diagram of a lower end cover of another antenna assembly is shown.

[0034] Figure 4B According to some embodiments of the present application, a front plane structural diagram of a middle lower end cover is shown. Figure 4A

[0035] Figure 4C According to some embodiments of the present application, a back plane structural diagram of a middle lower end cover is shown. Figure 4A

[0036] Figure 5 According to some embodiments of the present application, an exploded structural diagram of a middle lower end cover is shown. Figure 4A

[0037] Figure 6A According to some embodiments of the present application, a three-dimensional structural diagram of a side wall of a lower end cover is shown.

[0038] Figure 6B According to some embodiments of the present application, a back plane structural diagram of a middle side wall is shown. Figure 6A

[0039] Figure 6C According to some embodiments of the present application, a side view of a middle side wall after being cut along A-A direction is shown. Figure 6A

[0040] Figure 7 According to some embodiments of the present application, a three-dimensional structural diagram of a lower end cover of yet another antenna assembly is shown.

[0041] Figure 8 According to some embodiments of the present application, a three-dimensional structural diagram of a mounting plate of a lower end cover is shown. DETAILED DESCRIPTION

[0042] The illustrative embodiments of the present application include, but are not limited to, a lower end cover of an antenna assembly, an antenna assembly, and a base station system. ​​​​​

[0043] For ease of understanding, the following first combines Figure 1 and Figure 2 introduce an application scenario of the antenna assembly in this application, specifically, a base station system.

[0044] Figure 1 A structural schematic diagram of a base station system 1 is shown. The base station system 1 includes an antenna assembly 10, a support 11, a guyed mast 12, a feeder 13, a connector 14, and a baseband processing unit (not shown), the antenna assembly 10 includes an upper end cover 110, a lower end cover 120, a housing 130, a radio frequency module 140, etc. Among them, the radio frequency module 140 is arranged inside the housing 130, so Figure 1 is indicated by a dashed line.

[0045] First, the exemplary structure and working principle of the radio frequency module 140 are introduced. Figure 2 A specific structure of a radio frequency module 140 and a structural schematic diagram of a connector 14 are shown. Referring to Figure 2 and combining Figure 1 , the radio frequency module 140 can include a reflecting plate (not shown) and a plurality of components arranged on the reflecting plate, and the reflecting plate is usually fixed on the lower end cover 120. Among them, the plurality of components arranged on the reflecting plate include a radiating unit array 1401, a feed network 1402, a phase shifter 1403, a filter (or combiner) 1404, a transmission component 1405, and a calibration network 1406. In addition, the radio frequency module 140 can also include a remote control unit 1407, and the remote control unit 1407 is usually fixed on the lower end cover 120.

[0046] In Figure 2 , the radiating unit array 1401, the feed network 1402, the phase shifter 1403, the filter (or combiner) 1404, and the connector 14 are electrically connected in sequence, the transmission component 1405 and the calibration network 1406 are both electrically connected with the phase shifter 1403, and the remote control unit 1407 is electrically connected with the transmission component 1405. Among them, the radiating unit array 1401 is composed of a plurality of radiating units, and the plurality of radiating units can form a directional beam to send wireless signals outward. Specifically, each radiating unit can respectively receive and transmit signals through the respective feed network 1402, and the phase shifter 1403 controls the direction and shape of the beam by changing the phase of each radiating unit. The filter 1404 is used to remove unwanted frequency components, while the combiner 1404 is used to combine or separate multiple signals to ensure that only the desired signals are transmitted or received. The transmission component 1405 is responsible for adjusting the physical direction of the radio frequency module 140, so that the radio frequency module 140 can point to a specific signal coverage area, and the transmission component 1405 can be controlled by the remote control unit 1407. The calibration network 1406 is used to adjust and compensate for the loss and distortion of signals during transmission.

[0047] The signal transceiving principle of the radio frequency module 140 is described below in combination with the above-mentioned components. In the signal receiving process, the signal sent by the baseband processing unit is transmitted to the radio frequency module 140 through the feeder 13 and the connector 14 in turn. Then, the signal can be sent outward after reaching the radiating unit array 1401 through the filter 1404, the phase shifter 1403, and the feed network 1402 in turn. In the signal transmission process inside the radio frequency module 140, the calibration network 1406 can compensate the signal, and the remote control unit 1407 can control the transmission assembly 1405 to adjust the direction of the radio frequency module 140. Conversely, in the signal sending process, the radiating unit array 1401 receives the external wireless signal and sends it to the feed network 1402, and the signal reaches the baseband processing unit through the feed network 1402, the phase shifter 1403, the filter 1404, the connector 14, and the feeder 13 in turn.

[0048] With reference to Figure 1 , the radio frequency module 140 can be arranged inside the housing 130 and fixed to the lower end cover 120. Two brackets 11 are arranged at the upper end and the lower end of the housing 130 to fixedly connect the housing 130 and the boom pole 12. The boom pole 12 is used to fix the antenna assembly 10 to the ground and ground the antenna assembly 10. The connector 14 is mounted on the lower end cover 120. One end of the connector 14 is connected with the radio frequency module 140, and the other end of the connector 14 is connected with one end of the feeder 13. The other end of the feeder 13 is connected with the baseband processing unit.

[0049] Optionally, the number of the connectors 14 can be multiple, and each connector 14 is connected with one feeder 13. Different feeders 13 are used to transmit signals of different frequency bands.

[0050] In the above-mentioned antenna assembly 10, the upper end cover 110, the lower end cover 120, and the housing 130 are used to isolate the radio frequency module 140 from the outdoor environment, so as to achieve the functions of dustproof and waterproof, and ensure that the radio frequency module 140 is not disturbed by the change of the outdoor environment in the process of signal transceiving.

[0051] The specific structure of the lower end cover currently adopted is described in detail below in combination with Figure 3 .

[0052] For the convenience of subsequent description, before introducing the specific structure of the lower end cover 120, the X-axis direction, the Y-axis direction, and the Z-axis direction corresponding to the lower end cover 120 are defined in combination with Figure 1 . Figure 1As shown, the X-axis direction is the length direction of the lower end cover 120, the Y-axis direction is the width direction of the lower end cover 120, and the Z-axis direction is the extension direction of the cover 130, which is also the thickness direction of the lower end cover 120. In some embodiments of this application, the X-axis, Y-axis, and Z-axis directions intersect each other. In some implementations, the X-axis, Y-axis, and Z-axis directions can be perpendicular to each other. It should be noted that... Figure 1 The extension direction of the middle cover 130, that is, the Z-axis direction, can be perpendicular to the ground, for example, it can be 90°, in which case the XY plane can be parallel to the ground; the Z-axis direction can also be nearly perpendicular to the ground, for example, it can be 85°-95°.

[0053] Additionally, it should be noted that the directional terms such as "upper," "lower," "left," "right," "top," "bottom," and "above" used herein refer to exemplary orientations shown in the accompanying drawings corresponding to the embodiments, and do not indicate or imply that the components referred to must have a specific orientation. These terms can vary according to actual use and should not be construed as limiting this application. Furthermore, it is understood that when the viewing angle of the accompanying drawings changes (e.g., the drawings are rotated at any angle for reference), the directional terms also change accordingly.

[0054] It is understood that the perpendicularity in this application is not absolute perpendicularity. Approximate perpendicularity due to processing and assembly errors (e.g., an angle of 89° between two structural features) is also within the scope of mutual perpendicularity in this application. Similarly, the parallelism in this application is not absolute parallelism. Approximate parallelism due to processing and assembly errors (e.g., an angle of 1° between two structural features) is also within the scope of mutual parallelism in this application. The limitations of mutual parallelism and mutual perpendicularity will not be repeated below.

[0055] Figure 3 A three-dimensional structural schematic diagram of the lower end cover 120 of an antenna assembly according to this application is shown. (Reference) Figure 3 The lower end cover 120 includes a main body 210 and a waterproof component 220. The main body 210 includes a substrate 2101, a baffle 2102, and a baffle 2103. The baffles 2102 and 2103 have the same dimensions along the Z-axis. The baffles 2102, 2103, and the substrate 2101 form an annular groove 2104. The bottom of the annular groove 2104 has multiple drainage holes (not shown). The waterproof component 220 is an annular frame composed of multiple water storage tanks 2201. The bottom of each water storage tank 2201 has a water guide hole (not shown). When assembling the lower end cover 120, the waterproof component 220 is inserted into the annular groove 2104. When assembling the antenna assembly 10, the cover 130 ( Figure 1The cover 130 is inserted into the annular groove 2104. It should be noted that other structures can also be provided on the substrate 2101, and other structures in the lower end cover 120 are omitted here for ease of description.

[0056] In the lower end cover 120 described above, if it is a rainy day, external rainwater will flow into the annular groove 2104 along the cover 130 Figure 1 ), and first enter the water storage groove 2201 for storage to buffer energy and prevent excessive water from directly flowing into the cover 130. Then, the rainwater flows into the water leakage hole on the substrate 2101 through the water guide hole at the bottom of the water storage groove 2201, and finally flows out of the lower end cover 120 through the water leakage hole, thereby achieving the waterproof function of the antenna assembly.

[0057] However, although the structure of the lower end cover 120 described above can improve the waterproof performance of the antenna assembly, the waterproof performance is realized by a separate waterproof component 220, which makes the overall structure of the antenna assembly 10 more complex and increases the production cost of the antenna assembly 10. In addition, when the annular groove 2104 is filled with rainwater, there is still a possibility of water entering the cavity of the antenna assembly 10.

[0058] Based on the above problems, an embodiment of the present application provides a lower end cover of an antenna assembly, which comprises a panel and a side wall connected with the panel and extending along the circumference of the panel to jointly form a first cavity with the panel, the first cavity being open to the positive direction of the Z axis (as an example of the first direction), wherein an annular groove is formed in the side wall and surrounds the first cavity, the annular groove is open to the positive direction of the Z axis, and the cover of the antenna assembly is inserted into the annular groove. The height of the inner side wall of the annular groove is greater than the height of the outer side wall of the annular groove, and a water leakage hole is formed in the bottom wall of the annular groove. In this way, since the antenna assembly is placed in an outdoor environment, when it is a rainy day or condensate water is generated in the outdoor environment, the water flow can flow downward along the outer surface of the cover into the annular groove and flow out through the water leakage hole. When the water flow is too fast and fills the annular groove, the water flow will first overflow from the lower outer side wall before overflowing from the inner side wall, so that the water flow does not overflow from the inner side wall and contact the radio frequency module 140. Therefore, the structure of the lower end cover described above can realize the waterproof function of the antenna assembly without an additional waterproof component, thereby simplifying the overall structure of the antenna assembly and improving the structural integration of the antenna assembly.

[0059] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0060] The following will be described in detail Figures 4A-4C An embodiment of the lower end cover of the present application will be described in detail.

[0061] Figure 4AA perspective structural schematic diagram of the lower end cover 120 is shown; Figure 4B A perspective structural schematic diagram of the lower end cover 120 is shown; Figure 4A A perspective structural schematic diagram of the lower end cover 120 is shown; Figure 4C A perspective structural schematic diagram of the lower end cover 120 is shown; Figure 4A A perspective structural schematic diagram of the lower end cover 120 is shown.

[0062] It should be noted that the front surface of the lower end cover 120, the front surface of the side wall 120a, the front surface of the panel 120b, and the front surface of the mounting plate 120c refer to the surface facing away from the cover 130 when the lower end cover 120 is installed on the antenna assembly 10. Conversely, the back surface of the lower end cover 120, the back surface of the side wall 120a, the back surface of the panel 120b, and the back surface of the mounting plate 120c refer to the surface facing toward the cover 130 when the lower end cover 120 is installed on the antenna assembly 10.

[0063] Referring to Figures 4A-4C , the lower end cover 120 includes a side wall 120a, a panel 120b, a mounting plate 120c, and a fastener 120d (as a first fastener). Among them, referring to Figure 4A and Figure 4B , the side wall 120a is connected with the panel 120b and extends along the circumference of the panel 120b to jointly enclose a first cavity with the panel 120b, the first cavity being open toward the positive direction of the Z-axis (as an example of the first direction), referring to Figure 4B and Figure 4C , the mounting plate 120c is connected with the panel 120b and / or connected with the side wall 120a, and the panel 120b and the mounting plate 120c are sequentially stacked along the positive direction of the Z-axis, that is, the mounting plate 120c is located in the first cavity. In addition, the side wall 120a, the panel 120b, and the mounting plate 120c are respectively provided with a fastening hole 1208 (as a first fastening hole), a fastening hole 1208' (as a second fastening hole), and a fastening hole 1208" (as a third fastening hole), and the fastener 120d sequentially penetrates the fastening hole 1208, the fastening hole 1208', and the fastening hole 1208" along the positive direction of the Z-axis.

[0064] In some embodiments, the material of the side wall 120a can be a plastic material, and the molding process of the plastic material can be injection molding, die pressing, or the like. The material of the panel 120b can be a plastic material, a modified plastic material, or a composite material, and the composite material can be a polymer composite material. The material of the mounting plate 120c can be a conductive material, for example, a sheet metal material, which can be an aluminum / iron alloy or a processed material based on an aluminum / iron alloy. It should be noted that the specific materials of the side wall 120a, the panel 120b, and the mounting plate 120c are not limited in the present application, and a person skilled in the art can select appropriate materials according to actual needs.

[0065] In some embodiments, the thickness of the panel 120b can range from 0.1 mm to 2.0 mm, for example, the thickness of the panel 120b can be 0.1 mm, 0.5 mm, 1.0 mm, 1.5 mm, or 2.0 mm, and the like; the thickness of the mounting plate 120c can range from 1.0 mm to 3.0 mm, for example, the thickness of the mounting plate 120c can be 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, or 3.0, and the like. It should be noted that the specific thickness range of the panel 120b and the mounting plate 120c is not limited in the present application, and those skilled in the art can select a suitable thickness according to actual needs.

[0066] In some embodiments, the fastener 120d can be one or more of a screw, a rivet, or a buckle, and the fastener 120d can also be other fixing structures. In addition, with reference to Figures 4A-4C , the number of fasteners 120d can be 4; in other embodiments, the number of fasteners 120d can also be other numbers, such as 1, 2, 3, 5, and the like. The fastener 120d is used to integrally fix the side wall 120a, the panel 120b, and the mounting plate 120c, and to reduce the gap between the side wall 120a, the panel 120b, and the mounting plate 120c, thereby improving the stability and overall flatness of the lower end cover 120.

[0067] In some embodiments, with reference to Figures 4A-4C , the panel 120b also has a fixing via 1214, the mounting plate 120c also has a fixing via 1214', and the lower end cover 120 can further include a fixing member (not shown) that penetrates the fixing via 1214 and the fixing via 1214' in the positive direction of the Z axis in sequence, to further reduce the gap between the panel 120b and the mounting plate 120c, i.e., the gap in the Z axis direction, thereby improving the overall flatness of the lower end cover 120. The fixing via 1214 can be 3, and can also be other numbers, which are not limited in the present application; and the fixing member can be one or more of a screw, a rivet, or a buckle.

[0068] The specific structures of the side wall 120a, the panel 120b, and the mounting plate 120c in the above Figures 4A-4C will be described in detail below. It should be noted that the structure of the side wall 120a in the above Figures 4A-4C is the same as the structure of the side wall 120a in Figure 5 , Figures 6A-6C , the structure of the panel 120b is the same as the structure of the panel 120b in Figure 5 , and the structure of the mounting plate 120c is the same as the structure of the mounting plate 120c in Figure 8 . Therefore, Figures 4A-4CThe specific structures of the middle sidewall 120a, panel 120b and mounting plate 120c can be referred to in the following embodiments, and will not be described again.

[0069] First, the following combination Figure 5 , Figures 6A-6C An embodiment of the sidewall of this application will be described in detail.

[0070] Figure 5 It shows Figure 4A An exploded structural diagram of the lower end cap 120; specifically, Figure 5 (a), (b), (c), and (d) are schematic diagrams of the three-dimensional structure of sidewall 120a, panel 120b, mounting plate 120c, and fastener 120d, respectively. Figure 6A A three-dimensional structural diagram of the back sidewall 120a is shown; Figure 6B It shows Figure 6A Schematic diagram of the back planar structure of the middle sidewall 120a. Figure 6C It shows Figure 6A The side view after the middle sidewall 120a is cut along the AA direction can be a view parallel to the XZ plane.

[0071] refer to Figure 5 (a) Figure 6A and Figure 6B An annular groove 1202 surrounding the first cavity is formed in the side wall 120a. The opening of the annular groove 1202 faces the positive Z-axis direction. The cover 130 of the antenna assembly 10 is inserted into the annular groove 1202. Figure 1 In this design, the height of the inner wall 1203 of the annular groove 1202 is greater than the height of the outer wall 1204 of the annular groove 1202, and a drainage hole 1206 is provided on the bottom wall 1205 of the annular groove 1202. It can be understood that the positive Z-axis direction can be either the depth direction or the height direction of the annular groove 1202. The fact that the height of the inner wall 1203 is greater than the height of the outer wall 1204 can be understood as the inner wall 1203 protruding beyond the outer wall 1204 along the positive Z-axis direction.

[0072] Therefore, as mentioned above, when the outdoor environment where the antenna assembly is located is rainy, or when condensate is generated in the outdoor environment, rain or condensate can flow down along the outer surface of the cover 130 into the annular groove 1202 due to gravity, and flow out through the water leakage hole 1206 on the bottom wall 1205. When the water flow is too fast or the water volume is too large to fill the annular groove 1202, due to the inner side wall 1203 protruding from the outer side wall 1204, the water flow will first overflow from the lower outer side wall 1204 before overflowing from the inner side wall 1203, so that the water flow will not overflow from the inner side wall 1203 side into the interior of the antenna assembly 10, preventing the radio frequency module 140 inside the cover 130 from being flooded, thereby ensuring the signal transmission function of the radio frequency module 140. Moreover, the above structure is directly provided in the side wall 120a, which can also save a separate waterproof assembly, thereby simplifying the overall structure of the antenna assembly 10 and improving the structural integration of the antenna assembly 10.

[0073] In some embodiments, with reference to Figure 6C , the height difference δh of the inner side wall 1203 and the outer side wall 1204 can be greater than or equal to 3 mm, for example, the height difference δh of the inner side wall 1203 and the outer side wall 1204 can be 3 mm, 3.5 mm, 4 mm, or 5 mm, etc. As mentioned above, the extension direction of the cover 130, i.e., the Z-axis direction, can be perpendicular or close to perpendicular to the ground. Setting the height difference δh to be greater than or equal to 3 mm not only ensures that the inner side wall 1203 protrudes from the outer side wall 1204 when the opening of the annular groove 1202 is perpendicular to the ground, but also ensures that the inner side wall 1203 still protrudes from the outer side wall 1204 when the opening of the annular groove 1202 is close to perpendicular to the ground, thereby ensuring that the waterproof effect of the side wall 120a can be achieved.

[0074] In some embodiments, with reference to Figure 6C , the thickness t1 of the bottom wall 1205 can be greater than or equal to 1.5 mm; the thickness t2 of the inner side wall 1203 can be greater than or equal to 1.5 mm; and the thickness t3 of the outer side wall 1204 can be greater than or equal to 1.5 mm. Moreover, the thickness t1, the thickness t2, and the thickness t3 can be the same or different. For example, the thickness t1, the thickness t2, and the thickness t3 can all be 1.5 mm, etc.

[0075] In some embodiments, with reference to Figure 6B, the hole diameter d of the water leakage hole 1206 is greater than or equal to 2 mm. For example, the hole diameter d of the water leakage hole 1206 can be 2 mm, 2.2 mm, 2.5 mm, etc. Wherein, the hole diameter d of the water leakage hole 1206 can refer to any hole diameter dimension of the water leakage hole 1206 in the XY plane. Thus, by setting the hole diameter d of the water leakage hole 1206 to be greater than or equal to 2 mm, the water droplet surface tension can be overcome, so that the water flow can flow out of the water leakage hole 1206 more smoothly, that is, the water flow out speed from the water leakage hole 1206 is accelerated, to reduce the probability of the water flow filling the annular groove 1202, further improving the waterproof capability of the antenna assembly 10.

[0076] With reference back to (a), Figure 5 , (b), Figure 6A , and Figure 6B , the number of water leakage holes 1206 can be multiple, and the multiple water leakage holes 1206 are sequentially and spacedly arranged along the circumference of the annular groove 1202. Therefore, the multiple water leakage holes 1206 can timely leak out the water flow flowing into the annular groove 1202 from the circumferential surface of the cover shell 130 from the lower end cover 120, so as to cope with the water flow entering the annular groove 1202 from different directions, further improving the waterproof capability of the antenna assembly 10.

[0077] With reference back to (a), Figure 5 , (b), Figure 6A , and Figure 6B , the side wall 120a further comprises an annular flange 1207, and the inner side wall 1203 surrounds and is connected with the annular flange 1207. Referring to Figures 4A-4C , the panel 120b is connected with the annular flange 1207, specifically, the panel 120b can be arranged on the annular flange 1207, so as to further improve the resistance of the external rainwater entering the inside of the antenna assembly 10. And the fastening hole 1208 is arranged on the annular flange 1207, and the fastener 120d sequentially penetrates the fastening hole 1208, the fastening hole 1208' and the fastening hole 1208".

[0078] With reference back to (a), Figure 5 , (b), Figure 6A , and Figure 6BThe side wall 120a further comprises a boss 1209 and a buckle 1210, both of which are arranged on the surface of the annular flange 1207 facing the positive direction of the Z-axis. The boss 1209 and the buckle 1210 can both be multiple in number, and the multiple bosses 1209 are arranged in sequence along the circumference of the annular flange 1207, and the multiple buckles 1210 are arranged in sequence along the circumference of the annular flange 1207. The boss 1209 and the buckle 1210 are used to fix the panel 120b and the mounting plate 120c on the side wall 120a, and the cooperation and fixing structure and the fixing mode of the boss 1209 and the buckle 1210 will be described in detail in the following embodiments. It should be noted that the number of the boss 1209 and the buckle 1210 can also be one, and the number of the boss 1209 and the buckle 1210 is not limited in the present application.

[0079] In some embodiments, the annular groove 1202, the boss 1209, the buckle 1210 and the annular flange 1207 can be an integrally formed structure, wherein the integrally formed structure means that the annular groove 1202, the boss 1209, the buckle 1210 and the annular flange 1207 are manufactured at one time by the method of integral forming, without the need for separate assembly process, avoiding the possible connection weak points inside the side wall 120a, so that the integrally formed structure has high strength and rigidity.

[0080] For ease of understanding, before introducing the specific structure of the panel 120b and the mounting plate 120c, the specific structure of the panel 120b and the mounting plate 120c will be introduced in combination with the specific structure of the side wall 120a. Figure 7 A lower end cover currently used will be described in detail.

[0081] Figure 7 A perspective structural schematic diagram of another lower end cover 120 of the present application is shown. Referring to Figure 7 The lower end cover 120 comprises a base plate 301, a surrounding frame 302 and a connector limiting structure 303, the surrounding frame 302 surrounds the edge of the base plate 301, and the connector limiting structure 303 is arranged on the base plate 301. The base plate 301 in the limiting structure 303 is provided with a connector mounting hole 304, which is used to fix the connector 14( Figure 1 ) on the lower end cover 120. It should be noted that the base plate 301 can also be provided with other structures, and the other structures on the base plate 301 are omitted here for ease of description.

[0082] In the above structure, the substrate 301 is usually made of a non-metallic material, such as a polymer composite material, and the outer surface of the connector 14 is usually made of a metal material. Therefore, the connector 14 needs to be grounded to avoid lightning strikes in an outdoor environment. Currently, the antenna assembly 10 is usually equipped with a metal grounding sheet (not shown) inside, one side of which is connected to the connector 14 in the connector mounting hole 304, and the other side is connected to the reflector plate (not shown). Thus, referring to Figure 1 , the connector 14 can be grounded through the metal grounding sheet, the reflector plate, the support 11, and the guyed mast 12 in sequence.

[0083] However, although the metal grounding sheet can achieve the grounding function of the connector 14, it further increases the complexity of the structure of the antenna assembly 10, reduces the structural integration of the antenna assembly 10, and increases the production cost of the antenna assembly 10.

[0084] To solve the above problems, the following will continue to combine Figure 5 and Figure 8 to describe an embodiment of the panel and the mounting plate of the present application in detail.

[0085] Referring to Figure 5 (b) and (c), the panel 120b includes a substrate 1211, and the substrate 1211 is provided with at least one via hole 1212; the mounting plate 120c includes a substrate 1216, and the substrate 1216 is provided with at least one set of mounting holes 1212', the number of each set of mounting holes 1212' can be one or more, and the mounting holes 1212' are used to mount the feeder 13 and the connector 14. Figure 1 Each via hole 1212 and each set of mounting holes 1212' correspond to each other, that is, at least one mounting hole 1212' and at least one via hole 1212 correspond to each other; the projection of the via hole 1212 on the XY plane (as an example of the first plane) in the positive direction of the Z axis covers the projection of the corresponding mounting hole 1212' on the XY plane in the positive direction of the Z axis. Therefore, a part of the connector 14 can be placed in the via hole 1212, and the connector 14 can be fixed on the mounting hole 1212' to improve the connection stability of the connector 14 and the lower end cover 120.

[0086] Referring to Figure 5 (c), in some embodiments, the number of each set of mounting holes 1212' can be at least three, and specifically, each set of mounting holes 1212' can include a center mounting hole and at least two edge mounting holes, the at least two edge mounting holes are spaced around the circumferential edge of the center mounting hole, and are respectively arranged at intervals from the center mounting hole.

[0087] It should be noted that this application does not impose any restrictions on the number of vias 1212, the number of groups of mounting holes 1212', the number of mounting holes 1212' in each group, or the number of connectors.

[0088] In some embodiments, the mounting hole 1212' can be a through hole, a threaded hole, or a press-fit nut, etc., to ensure that the mounting hole 1212' mates with the connector fastener (not shown) to fix the connector 14 on the mounting plate 120c.

[0089] Continue to refer to Figure 5 In (c), the mounting plate 120c includes a metal portion for connecting to the reflector; wherein the aforementioned mounting hole 1212' is provided on the metal portion of the mounting plate 120c. Since the connector fasteners are also made of conductive material, when the connector 14 is mounted on the mounting plate 120c, it can be electrically connected to the mounting plate 120c via the connector fasteners. The reflector is also mounted on the metal portion of the mounting plate 120c, meaning the mounting plate 120c and the reflector can also be electrically connected. The reflector is electrically connected to the bracket 11 via a metal fastener and can be grounded via a support rod 12 connected to the bracket 11. This achieves the installation and grounding functions of the connector 14, eliminating the need for a metal grounding plate and simplifying the antenna assembly 10. Figure 1 The overall structure of the antenna assembly 10 has been improved, enhancing the structural integration of the antenna assembly 10.

[0090] Continue to refer to Figure 5 In (b) and (c), mounting plate 120c also includes mounting section 1217, which is used to mount the remote control unit 1407 of radio frequency module 140. Figure 1 Correspondingly, panel 120b is also provided with clearance hole 1213, clearance hole 1213 is used to clear the remote control unit 1407 mounted on mounting plate 120c; mounting plate 120c is also provided with through hole 1213' so that a part of remote control unit 1407 passes through through hole 1213' and is fixed on mounting part 1217, thus enabling remote control unit 1407 to be fixed on lower end cover 120.

[0091] Figure 8 According to some embodiments of this application, a three-dimensional structural schematic diagram of a mounting plate for a lower end cover is shown. (Reference) Figure 8 In some embodiments, the mounting portion 1217 is disposed on the substrate 1216 and is an extension structure at a certain angle to the substrate 1216. The mounting portion 1217 may also have a mounting hole 1217a so that fasteners such as screws (not shown) pass through the mounting hole 1217a and are fixed to the remote control unit 1407. It should be noted that... Figure 8 Other structures of the mounting plate 120c and Figure 5The structure of the mounting plate 120c is the same, so it will not be described again here.

[0092] Continue to refer to Figure 5 In (b), the surface of panel 120b facing away from the positive Z-axis direction is marked with the frequency band information 1215 of the RF module 140. The frequency band information 1215 can also be called an RF identifier. The frequency band information 1215 can be located near the corresponding connector 14. The frequency band information corresponding to different connectors 14 can be the same or different. The surface of panel 120b facing away from the positive Z-axis direction is the outer surface S1 of the lower end cover 120. Therefore, placing the frequency band information 1215 on the outer surface S1 facilitates the differentiation of the frequency bands of different connectors 14 and their corresponding feeders 13 by the operator.

[0093] Continue to refer to Figure 5 In (b), the number of frequency band information 1215 is one or more, and the frequency band information 1215 can correspond one-to-one with connector 14. In some embodiments, the shape of the area occupied by the frequency band information 1215 can be rectangular, triangular, rhomboid, etc., for example in... Figure 4B The center is circular; the frequency band information 1215 can be printed on the outer surface S1 of the lower end cover 120 by means of screen printing, watermarking, ultraviolet (UV) printing, etc. It should be noted that this application does not impose any restrictions on the shape and printing method of the frequency band information 1215.

[0094] Continue to refer to Figure 5 The substrate 1211 of panel 120b is provided with a boss through hole 1209' and a snap-fit ​​through hole 1210'. The substrate 1216 of mounting plate 120c is provided with a boss through hole 1209' corresponding to the boss through hole 1209' and a snap-fit ​​through hole 1210' corresponding to the snap-fit ​​through hole 1210'. The boss 1209 on the side wall 120a passes through the boss through hole 1209' and the boss through hole 1209' in sequence along the positive Z-axis direction. The snap-fit ​​1210 passes through the snap-fit ​​through hole 1210' and the snap-fit ​​through hole 1210' in sequence along the positive Z-axis direction to fix panel 120b and mounting plate 120c to side wall 120a and increase the connection strength of lower end cover 120.

[0095] Among them, multiple latches 1210 and bosses 1209 are sequentially distributed at the circumferential edge of the annular flange 1207, and multiple latching through holes 1210'

[0096] Multiple boss through holes 1209' are sequentially distributed on the circumferential edge of the panel 120b, and multiple snap-fit ​​through holes 1210" and multiple boss through holes 1209" are sequentially distributed on the circumferential edge of the mounting plate 120c. Furthermore, a snap-fit ​​1210, a snap-fit ​​through hole 1210', and a snap-fit ​​through hole 1210" are arranged in a one-to-one correspondence along the positive Z-axis, and a boss 1209, a boss through hole 1209', and a boss through hole 1209" are also arranged in a one-to-one correspondence along the positive Z-axis. It should be noted that this application does not impose any limitations on the specific shape of the snap-fit ​​1210 and the boss 1209.

[0097] In some embodiments, some clips 1210 on the annular flange 1207 can engage with and pass through the clip through hole 1210', while other clips 1210 can pass through the clip through hole 1210' and engage with it. That is, each clip 1210 can engage with one of the panel 120b and the mounting plate 120c. Engaging is a fixing method; for example, clipping 1210 with panel 120b means fixing panel 120b to clip 1210. Passing through means that the size of the clip is smaller than the size of the corresponding clip through hole, i.e., there is a certain gap between the clip and the corresponding clip through hole, thus it is not a completely fixed connection. For example, see reference... Figure 6A A latch 1210 located at the center of the upper edge of the annular flange 1207 in the X-axis direction, and a latch 1210 located at the center of the lower edge of the annular flange 1207 in the X-axis direction, can engage with the mounting plate 120c. Figure 5 The remaining clips 1210 can be engaged with the panel 120b. It should be noted that this application does not impose any restrictions on the position or engagement position of the clips 1210, clip through holes 1210' and 1210"".

[0098] In some embodiments, the aforementioned boss 1209 can pass through the boss through hole 1209' and engage with the boss through hole 1209", that is, the boss 1209 is fixed to the mounting plate 120c. The boss 1209 also serves as a load-bearing structure in the side wall 120a to support the mounting plate 120c and distribute the stress intensity at other fixing points, thereby further enhancing the internal stability of the lower end cover 120.

[0099] Continue to refer to Figure 5 (c) and Figure 8 The mounting plate 120c has one or more weight-reducing holes 1218 on its base plate 1206 to reduce the weight of the mounting plate 120c and improve the portability of the lower end cover 120. The weight-reducing holes 1218 may communicate with one or more sets of mounting holes 1212'. In some other embodiments, the weight-reducing holes 1218 may be located in other positions, which is not limited in this application.

[0100] Continue to refer to Figure 5 (c) and Figure 8 The mounting plate 120c also includes a mounting portion 1219 and a mounting portion 1220, wherein the mounting portion 1219 is used to mount the housing 130, and the mounting portion 1220 is used to mount the reflector of the RF module 140. (Reference) Figure 8 In some embodiments, the mounting portion 1219 is disposed on the edge of the substrate 1216 and is an extension structure at a certain angle to the substrate 1216. The mounting portion 1219 may also have mounting holes to allow fasteners such as screws (not shown) to pass through the mounting holes and be fixed to the cover 130. The mounting portion 1220 is disposed on the substrate 1216 and can be connected to the weight-reducing hole 1218. The mounting portion 1220 is an extension structure at a certain angle to the substrate 1216 and may also have mounting holes to allow fasteners such as screws (not shown) to pass through the mounting holes and be fixed to the reflector. It should be noted that there can be one or more mounting portions 1219 and 1220, and this application does not impose any limitations on the specific positions of the mounting portions 1219 and 1220.

[0101] In some embodiments, this application also provides an antenna assembly. It is understood that the specific structure of the antenna assembly can be referred to the relevant descriptions in the above embodiments, and will not be repeated here.

[0102] In some embodiments, the radio frequency module in the antenna assembly may include a remote control unit, which is mounted on the mounting portion of the lower end cover. It is understood that the specific structures of the radio frequency module and the remote control unit can be referred to the relevant descriptions in the above embodiments, and will not be repeated here.

[0103] In some embodiments, this application also provides a base station system, which may include an antenna assembly, a connector, a feeder, and a baseband processing unit as described in the above embodiments of this application, wherein the connector is electrically connected to the lower end cover of the antenna assembly and the feeder, respectively, and the feeder is electrically connected to the baseband processing unit. It is understood that the specific structure of the above base station system can be referred to the relevant descriptions in the above embodiments, and will not be repeated here.

[0104] The above describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Although the description of the present application is introduced in combination with some embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. The present application can also not use these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details are omitted in the description. It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict.

[0105] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "fitting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0106] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A lower end cap of an antenna assembly, characterized by, The lower end cover comprises a panel and a side wall connected with the panel and extending along the circumference of the panel to jointly enclose a first cavity with the panel, the first cavity being open to a first direction; The side wall is provided with an annular groove surrounding the first cavity, the annular groove being open to the first direction, and a cover of the antenna assembly being inserted into the annular groove; the inner side wall of the annular groove has a height greater than that of the outer side wall of the annular groove, and a water leakage hole is formed in the bottom wall of the annular groove.

2. The lower end cap of claim 1, wherein The water leakage hole has a diameter greater than or equal to 2 mm.

3. The lower end cap of claim 1, wherein The water leakage hole is one of a plurality of water leakage holes, and the plurality of water leakage holes are sequentially and spacedly arranged along the circumference of the annular groove.

4. The lower end cap of claim 1, wherein The lower end cover further comprises a mounting plate connected with the panel or the side wall, and the panel and the mounting plate are sequentially stacked along the first direction; The mounting plate is provided with at least one mounting hole for mounting a feeder and a connector; The panel is provided with at least one through hole, the at least one mounting hole and the at least one through hole correspond to each other, and a projection of the through hole on a first plane along the first direction covers a projection of the corresponding mounting hole on the first plane along the first direction, the first plane being perpendicular to the first direction.

5. The lower end cap of claim 4, wherein, A surface of the panel opposite to the first direction is marked with frequency band information of the feeder and the connector.

6. The lower end cap of claim 4, wherein The mounting plate comprises a metal part for connecting with a reflector plate of the antenna assembly, and the mounting hole is arranged on the metal part.

7. The lower end cap of claim 4, wherein The mounting plate further comprises a mounting portion for mounting a remote control unit of the antenna assembly. The panel is further provided with a relief hole for avoiding the remote control unit mounted on the mounting plate.

8. The lower end cap of claim 4, wherein The side wall further comprises an annular flange, the inner side wall surrounds and is connected with the annular flange, and the panel is connected with the annular flange.

9. The lower end cap of claim 8, wherein, The lower end cover further comprises a first fastener, the annular flange, the panel and the mounting plate are respectively provided with a first fastening hole, a second fastening hole and a third fastening hole, and the first fastener sequentially penetrates the first fastening hole, the second fastening hole and the third fastening hole.

10. An antenna assembly, characterized by The antenna assembly comprises a radio frequency module, a cover and a lower end cover as claimed in any one of claims 1 to 9, the radio frequency module is located in the cover, and a bottom of the cover is inserted into the annular groove of the lower end cover.

11. The antenna assembly of claim 10, wherein, The radio frequency module comprises a remote control unit, and the remote control unit is mounted on the mounting portion of the lower end cover.

12. A base station system, characterized by The antenna assembly comprises a radio frequency module, a cover and a lower end cover as claimed in any one of claims 1 to 9, the radio frequency module is located in the cover, and a bottom of the cover is inserted into the annular groove of the lower end cover.

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