Antenna apparatus and communication device

Abstract

The present application relates to the technical field of wireless communications. Disclosed are an antenna apparatus and a communication device. The antenna apparatus comprises a radiation assembly and a feed network, wherein the radiation assembly has a first coupling structure; the feed network comprises a second coupling structure; one of the first coupling structure and the second coupling structure is provided with a cavity, the other one is provided with a plug-in portion; at least part of the plug-in portion is arranged in the cavity; and there is a first gap between the plug-in portion and an inner wall of the cavity. The communication device comprises the antenna apparatus.

Description

Antenna device and communication equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 30, 2023, with application number 202310795434.4 and invention name “Antenna device and communication equipment”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of wireless and communication technology, and specifically relates to an antenna device and communication equipment. Background Art

[0004] With the rapid development of wireless communication technology, the system has put forward higher requirements for base station antennas, such as high integration, high radiation efficiency, high index requirements, and green environmental protection.

[0005] The use of solderless connections between the antenna unit's feed element and feed network avoids soldering, significantly reducing soldering energy consumption and the use of solder wire, improving production efficiency. Furthermore, by eliminating cables or PCB adapters, dielectric loss is reduced, improving radiation efficiency, and becoming a future trend in antenna design. However, this solderless connection between the feed element and feed network often fails to meet stability and broadband performance requirements, impacting antenna reliability and preventing broadband design.

[0006] Summary of the Invention

[0007] An embodiment of the present application provides an antenna device, comprising: a radiating component and a feeding network; the radiating component has a first coupling structure; the feeding network includes a second coupling structure; one of the first coupling structure and the second coupling structure is provided with a cavity, and the other is provided with a plug-in portion, at least a portion of the plug-in portion is provided in the cavity, and a first gap is provided between the plug-in portion and the inner wall of the cavity.

[0008] An embodiment of the present application further provides a communication device, comprising the above-mentioned antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a schematic diagram of the contactless coupling feeding disclosed in an embodiment of the present application;

[0010] FIG2 is a schematic diagram of the three-dimensional structure of the antenna device disclosed in an embodiment of the present application;

[0011] FIG3 is a top view of the antenna device disclosed in an embodiment of the present application;

[0012] FIG4 is a disassembled schematic diagram of the antenna device with the reflective housing removed according to an embodiment of the present application;

[0013] FIG5 is a schematic structural diagram of an antenna device without a radiation unit according to an embodiment of the present application;

[0014] FIG6 is a schematic structural diagram of an antenna device including multiple radiating components disclosed in an embodiment of the present application;

[0015] FIG7 is a schematic diagram of the three-dimensional structure of another form of antenna device disclosed in an embodiment of the present application;

[0016] FIG8 is a side view of another form of antenna device disclosed in an embodiment of the present application;

[0017] FIG9 is a disassembled schematic diagram of another form of an antenna device disclosed in an embodiment of the present application;

[0018] FIG10 is a schematic structural diagram of a radiation component in another form of an antenna device disclosed in an embodiment of the present application;

[0019] FIG11 is a schematic diagram of another contactless coupling feeding disclosed in an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 100 - radiating component; 110 - feed core; 111 - first coupling structure; 1111 - coupling tube; 120 - support balun; 121 - first mounting hole; 122 - third clamping structure; 123 - boss; 130 - radiating unit;

[0022] 200-feeding network; 210-second coupling structure; 211-feeding needle;

[0023] 310 - first isolation medium; 320 - second isolation medium;

[0024] 400 - reflective housing; 410 - avoidance hole; 420 - second mounting hole; 430 - fourth clamping structure; 440 - groove;

[0025] 500-fasteners;

[0026] 600-mounting member; 610-first clamping structure; 620-second clamping structure;

[0027] 700-Fixed bracket. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0030] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0031] 1 to 11 , an embodiment of the present application discloses an antenna device, which is applied to a communication device. The disclosed antenna device includes a radiation component 100 and a feeding network 200 .

[0032] As shown in Figures 1 and 11, the radiation component 100 has a first coupling structure 111, and accordingly, the feeding network 200 includes a second coupling structure 210. Through the coupling between the first coupling structure 111 and the second coupling structure 210, the signal can be transmitted from the second coupling structure 210 to the first coupling structure 111, thereby realizing contactless coupling feeding.

[0033] One of the first coupling structure 111 and the second coupling structure 210 is provided with a cavity, and the other is provided with a plug-in portion. At least a portion of the plug-in portion is disposed within the cavity, and a first gap is defined between the plug-in portion and the inner wall of the cavity. The first gap can range from 0.1 mm to 0.5 mm, including, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc. Other values ​​are possible and are not specifically limited herein.

[0034] Illustratively, the first coupling structure 111 may be provided with a cavity, and the second coupling structure 210 may be provided with a plug-in portion, as shown in FIG1 ; of course, the first coupling structure 111 may also be provided with a plug-in portion, and the second coupling structure 210 may be provided with a cavity, as shown in FIG11 .

[0035] In the embodiment of the present application, the cascade feeding between the feeding network 200 and the radiating component 100 is achieved through the coupling feeding of the first coupling structure 111 and the second coupling structure 210. Specifically, contactless coupling feeding is achieved by inserting at least part of the plug-in portion into the cavity and forming a first gap between the two. Compared with the traditional welding method, the contactless coupling feeding method in the present application can avoid environmental pollution caused by welding, and does not require tinning, thereby ensuring radiation efficiency, reducing the number of solder joints between the radiating component and the feeding network, and reducing the hidden dangers of intermodulation between links, thereby improving the intermodulation index and stability of the antenna device, making the antenna device more consistent, and also reducing losses, simplifying the feeding structure of the antenna device, and to a certain extent, improving the assembly efficiency of the antenna device, reducing the assembly energy consumption of the entire antenna device, and reducing production costs.

[0036] In addition, compared with some current welding-free methods, the embodiments of the present application propose a new antenna device form, which realizes signal transmission through contactless coupling feeding, thereby meeting the communication system's requirements for antenna devices such as welding-free, wide bandwidth, high intermodulation and high stability.

[0037] It should be noted here that when the antenna device is working, coupled electromagnetic energy can be generated at a close distance between the plug-in part and the cavity, thereby generating current (such as generating current on the feed core 110, etc.), and radiating the energy outward through the radiation component 100 to achieve the effects of wide bandwidth, high intermodulation and high stability.

[0038] For example, the feed network 200 can be implemented as a metal stripline or an air stripline. Furthermore, the feed network 200 can operate on the same principle as a stripline and be manufactured using sheet metal, making it also known as a sheet metal stripline. Of course, the feed network 200 can also be implemented as a printed circuit board (PCB).

[0039] 1 and 3 , in some embodiments, the first coupling structure 111 may include a coupling tube 1111, the lumen of which forms a cavity. For example, the coupling tube 1111 is closed at one end and open at the other end. The closed end may be connected to the main body of the feed core 110, while the open end may be inserted into the plug connector.

[0040] To accommodate the first coupling structure 111, the second coupling structure 210 may include a feed pin 211, which is connected to the output end of the feed network 200. The end of the feed pin 211 facing away from the output end of the feed network 200 is inserted into the coupling tube 1111, and a first gap is defined between the outer wall of the feed pin 211 and the wall of the coupling tube 1111. Therefore, when the antenna device is operating, the feed pins 211 at each port of the feed network 200 can generate coupled electromagnetic energy in close proximity to the corresponding coupling tube 1111, thereby generating current (e.g., generating current on the feed core 110), and radiating the energy outward through the radiating component 100.

[0041] Based on the above configuration, the cascade feeding between the feeding network 200 and the radiating component 100 is achieved by inserting the feeding pin 211 at the output end of the feeding network 200 into the coupling tube 1111 at one end of the feeding core 110 of the radiating component 100, thereby forming a contactless coupling feeding method. Compared with the traditional method, the contactless coupling feeding method can reduce solder joints and reduce the risk of intermodulation between links, thereby improving the consistency of the antenna device.

[0042] For example, the coupling tube 1111 can be a circular tube, a polygonal tube, etc., and accordingly, the feed pin 211 can be a cylindrical pin, a polygonal pin, etc., to accommodate the shape of the coupling tube 1111 and ensure uniformity of the first gap. Furthermore, the feed pin 211 can be integrally formed with the output end of the feed network 200, specifically by casting, forging, stamping, or die-casting.

[0043] To achieve efficient coupling and feeding, the inner diameter of coupling tube 1111 is 0.1 mm to 0.5 mm larger than the outer diameter of feed pin 211. That is, the outer surface of feed pin 211 is 0.1 mm to 0.5 mm away from the inner surface of coupling tube 1111, forming a first gap. Furthermore, the depth of coupling tube 1111 is 0.1 to 0.5 mm greater than the length of feed pin 211.

[0044] The length of the feed pin 211 may be 0.1 to 0.2 times the wavelength corresponding to the operating center frequency of the antenna device.

[0045] In other embodiments, both the first coupling structure 111 and the second coupling structure 210 may be in the form of coupling plates, and contactless coupling and feeding may be achieved through the coupling plates.

[0046] Continuing with Figure 3 , in some embodiments, the first gap is filled with a first isolation medium 310, which separates the connector from the inner wall of the cavity. Filling with the first isolation medium 310 secures the connector in the cavity and prevents it from moving freely within the cavity, thereby ensuring the positional accuracy between the connector and the cavity and, to a certain extent, improving coupling accuracy. Furthermore, the first isolation medium 310 separates the connector from the inner wall of the cavity, preventing contact or short circuits between the connector and the cavity.

[0047] During assembly of the antenna device, the plug-in connector can be directly inserted into the cavity through the first isolation medium 310 for contactless coupling and feeding. This eliminates the need for welding between the feed network 200 and the radiating component 100, thereby avoiding environmental pollution caused by electroplating and welding and reducing costs. Furthermore, the elimination of tinning ensures radiation efficiency, reduces solder joints, and maintains product performance and reliable intermodulation indicators. Furthermore, the use of plug-in coupling achieves electrical signal coupling and improves assembly efficiency.

[0048] For example, the first isolation medium 310 can be an annular medium that surrounds the outer periphery of the plug-in portion, thereby completely isolating the plug-in portion from the inner wall of the cavity and ensuring that the plug-in portion does not move freely within the cavity. In addition, the first isolation medium 310 can be made of a non-metallic material such as resin or plastic.

[0049] With reference to Figures 1 to 3, in some embodiments, the antenna device may further include a reflective housing 400, wherein the feed network 200 is disposed within the reflective housing 400 and the radiating component 100 is disposed outside the reflective housing 400. The radiating component 100 may be fixed to the reflective housing 400 to ensure the stability of the radiating component 100, and the reflective housing 400 may also reflect electromagnetic wave signals to provide a reflection function. Furthermore, the reflective housing 400 may also provide protection for the feed network 200 therein, preventing the feed network 200 from being affected by external factors. Exemplarily, the reflective housing 400 may be made of metal.

[0050] Considering that the radiating element 100 is located outside the reflective housing 400 and the feeding network 200 is located inside the reflective housing 400, and to enable coupling and feeding between the radiating element 100 and the feeding network 200 without interference, the sidewall of the reflective housing 400 can be provided with an avoidance hole 410, through which the first coupling structure 111 or the second coupling structure 210 passes. Based on this, the provision of the avoidance hole 410 allows signals to be transmitted between the first coupling structure 111 and the second coupling structure 210 without being affected by the reflective cavity.

[0051] Furthermore, the radiation assembly 100 is connected to one of the side walls of the reflective housing 400. The surface of the side wall located outside the reflective housing 400 serves as a reflective surface for reflecting electromagnetic wave signals, and the avoidance hole 410 is provided in the side wall. For example, in actual working conditions, the outer surface of the top wall of the reflective housing 400 can be a reflective surface, which can reflect the electromagnetic wave signals emitted by the radiation assembly 100 to facilitate the propagation of the electromagnetic wave signals.

[0052] Exemplarily, the reflective housing 400 may be provided with openings at both ends in the Y direction. During assembly, the feeding network 200 may be assembled into the reflective housing 400 through any opening.

[0053] Referring to Figures 1 to 5, in some embodiments, the radiation component 100 may include a feed core 110 provided with a first coupling structure 111, a support balun 120 and a radiation unit 130 connected to the support balun 120, wherein the feed core 110 is arranged in the support balun 120 and is electrically connected to the radiation unit 130, and the support balun 120 is connected to the reflective shell 400.

[0054] The support balun 120 may be provided with a channel through which the feed core 110 is disposed. The support balun 120 can both secure the feed core 110 and protect it, thereby preventing damage to the feed core 110 caused by external influences. Furthermore, the radiating element 130 is connected to the support balun 120, and the support balun can secure the radiating element 130 to ensure its stability.

[0055] In some embodiments, the radiation assembly 100 may include a plurality of radiation units 130 , and each of the plurality of radiation units 130 may be connected to the support balun 120 , so that the plurality of radiation units 130 are fixedly installed via the shared support balun 120 .

[0056] Exemplarily, the feed core 110 and the radiation unit 130 may both be in the form of metal die-casting.

[0057] In order to achieve the connection between the radiation component 100 and the reflective shell 400, the support balun 120 can be provided with a first mounting hole 121. Correspondingly, the side wall of the reflective shell 400 can be provided with a second mounting hole 420. When the support balun 120 is installed to the reflective shell 400, the first mounting hole 121 is aligned with the second mounting hole 420, so that the fastener 500 can be passed through the first mounting hole 121 and the second mounting hole 420, so that the support balun 120 and the reflective shell 400 can be firmly fixed.

[0058] For example, the first mounting hole 121 may be a threaded hole, and the second mounting hole 420 may be a smooth hole. Accordingly, the fastener 500 may be a screw, a screw rod, a bolt, etc., and the support balun 120 may be firmly fixed to the side wall of the reflective housing 400 through the fastener 500 to ensure the stability of the support balun 120 on the reflective housing 400 and the stability of the radiation unit 130 connected to the support balun 120. Of course, the second mounting hole 420 may also be a threaded hole, and the first mounting hole 121 may be a smooth hole. The fastener 500 may be a screw, a screw rod, a bolt, etc., and the fastener 500 passes through the support balun 120 and is threadedly connected to the second mounting hole 420 to achieve fixed installation of the support balun 120.

[0059] In addition, by being fixed by the fasteners 500 , the support balun 120 can be easily removed from the reflective housing 400 for easy maintenance.

[0060] 7 to 9 , in other embodiments, the antenna device may further include a mounting member 600, which is connected between the supporting balun 120 and the reflecting shell 400. The mounting member 600 can ensure the installation firmness and stability of the supporting balun 120 and the tightness of the fit between the supporting balun 120 and the reflecting shell 400, and facilitate the disassembly of the supporting balun 120.

[0061] Furthermore, the mounting member 600 may include a first snap-fit ​​structure 610 and a second snap-fit ​​structure 620. Accordingly, the supporting balun 120 may be provided with a third snap-fit ​​structure 122, which is snap-fitted with the first snap-fit ​​structure 610. Based on this, a firm installation between the supporting balun 120 and the radiating component 100 can be achieved, and the snap-fitting can also facilitate the disassembly between the supporting balun 120 and the radiating component 100, thereby facilitating maintenance of the antenna device.

[0062] Exemplarily, one of the first clamping structure 610 and the third clamping structure 122 can be a structure such as a clamping protrusion or a clamping head, and the other can be a structure such as a clamping slot or a clamping hole, so as to ensure the firmness between the support balun 120 and the radiation component 100 when clamped together, and facilitate the separation of the first clamping structure 610 and the third clamping structure 122, so as to facilitate the disassembly and assembly of the support balun 120.

[0063] In addition, the reflective shell 400 can be provided with a fourth snap-fit ​​structure 430, which is snap-fitted with the second snap-fit ​​structure 620. Based on this, a firm installation between the support balun 120 and the reflective shell 400 can be achieved, and the snap-fitting can also facilitate the disassembly between the support balun 120 and the reflective shell 400, thereby facilitating maintenance of the antenna device.

[0064] Exemplarily, one of the second clip-on structure 620 and the fourth clip-on structure 430 can be a clip-on protrusion, a clip-on head, or the like, and the other can be a clip-on slot, a clip-on hole, or the like, so as to ensure the firmness between the support balun 120 and the reflective shell 400 when clipped together, and facilitate the separation of the second clip-on structure 620 and the fourth clip-on structure 430, so as to facilitate the disassembly and assembly of the support balun 120.

[0065] In order to achieve coupling and grounding of the radiation unit 130 , the radiation component 100 and the reflective cavity may be assembled in a plug-in assembly manner.

[0066] In some embodiments, the supporting balun 120 may be provided with a third coupling structure, and the side wall of the reflecting shell 400 may be provided with a fourth coupling structure. Through the cooperation between the third coupling structure and the fourth coupling structure, the coupling cooperation between the supporting balun 120 and the reflecting shell 400 may be achieved, thereby achieving coupling grounding between the supporting balun 120 and the reflecting shell 400.

[0067] One of the third coupling structure and the fourth coupling structure may be a boss 123, and the other may be a groove 440. The boss 123 is disposed within the groove 440, and a second gap is defined between the outer wall of the boss 123 and the inner wall of the groove 440. The second gap may range from 0.1 mm to 0.5 mm, including, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc., and may also be other values, which are not specifically limited herein.

[0068] For example, the support balun 120 may be provided with a ground coupling boss, and the reflective housing 400 may be provided with a ground coupling groove. The ground coupling boss and the ground coupling groove are engaged with each other to achieve grounding coupling between the support balun 120 and the reflective housing 400. Furthermore, the support balun 120 may be provided with one or more ground coupling bosses, and correspondingly, the reflective housing 400 may be provided with one or more ground coupling grooves to ensure the stability of the grounding coupling.

[0069] Based on the above arrangement, by coupling and assembling the boss 123 and the groove 440 and forming a second gap therebetween, effective coupling and grounding of the radiation balun can be ensured.

[0070] Referring to FIG. 9 , in some embodiments, the second gap is filled with a second isolation medium 320, which separates the outer wall of the boss 123 from the inner wall of the groove 440. Filling with the second isolation medium 320 allows the boss 123 to be securely mounted within the groove 440 and prevents it from moving freely within the groove 440. This ensures the positional accuracy between the boss 123 and the groove 440, improving coupling accuracy to a certain extent. Furthermore, the second isolation medium 320 can separate the boss 123 from the inner wall of the groove 440, preventing contact or short circuit between the boss 123 and the groove 440.

[0071] For example, the second isolation medium 320 can be a dielectric sheet having a thickness consistent with the spacing of the second gap, i.e., the dielectric sheet can have a thickness ranging from 0.1 mm to 0.5 mm to ensure a sealed filling of the second gap. Furthermore, the second isolation medium 320 can be made of a non-metallic material such as resin or plastic.

[0072] In some embodiments, a dielectric layer may be provided between the feed network 200 and the inner wall of the reflective cavity. This dielectric layer forms a non-metallic support to support the feed network 200 and separate the feed network 200 from the inner wall of the reflective cavity. For example, the dielectric layer may be made of a non-metallic material such as resin or plastic.

[0073] 4 and 5 , in order to achieve fixed installation of the feed network 200, the antenna device may further include a fixing bracket 700, which is disposed in the reflective shell 400, and the feed network 200 is disposed on the fixing bracket 700. Based on this, the fixing bracket 700 can be used to fix the feed network 200, and the feed network 200 can be suspended in the reflective shell 400 to ensure the stability of the feed network 200 in the reflective shell 400. The fixing bracket 700 can be made of an insulating material to ensure insulation between the feed network 200 and the reflective shell 400. Exemplarily, the fixing bracket 700 can be made of plastic. It should be noted here that the fixing bracket 700 can act as a dielectric layer, which can not only support and fix the feed network 200, but also separate the feed network 200 from the inner wall of the reflective shell 400.

[0074] In some embodiments, the fixed bracket 700 may include an upper bracket and a lower bracket. During assembly, the upper bracket is located above the feed network 200, and the lower bracket is located below the feed network 200. In this way, the feed network 200 is wrapped between the upper bracket and the lower bracket to protect the feed network 200 and separate the upper and lower parts of the feed network 200 from the reflective shell 400.

[0075] In order for the feeding network 200 and the fixing bracket 700 to be smoothly assembled into the reflective shell 400, it is necessary to ensure that the total thickness of the feeding network 200 and the fixing bracket 700 in the Z direction is less than the height of the inner diameter of the opening of the reflective shell 400 in the Z direction; and ensure that the width of the feeding network 200 and the fixing bracket 700 in the X direction is less than the width of the inner diameter of the opening of the reflective shell 400 in the X direction.

[0076] To improve signal transmission efficiency, the antenna device may include multiple radiating elements 100. Accordingly, the feed network 200 may include multiple second coupling structures 210, wherein the first coupling structures 111 of each of the multiple radiating elements 100 respectively cooperate with the multiple second coupling structures 210. This arrangement allows signals from the feed network 200 to be transmitted to the radiating elements 100 via multiple pairs of wirelessly coupled first coupling structures 111 and second coupling structures 210, and then radiated outward from the radiating elements 100, thereby improving signal transmission efficiency.

[0077] Specifically, the feeding network 200 can be provided with multiple output ends, and accordingly, the antenna device can be provided with multiple radiating components 100. Each output end can be provided with a plug-in part, and the multiple plug-in parts are respectively inserted into the respective cavities of the multiple radiating components 100, and perform contactless coupling feeding respectively, replacing the traditional feeding method through PCB board or coaxial cable welding, thereby reducing the solder joints on the link, simplifying the circuit structure, improving intermodulation, reducing losses, and improving production and processing efficiency.

[0078] In a more specific embodiment, the antenna device may include a supporting balun 120 mounted to a reflective shell 400, a radiating component 100 mounted to the supporting balun 120, a feeding core 110 disposed in the supporting balun 120 and electrically connected to the radiating component 100, and a feeding network 200 disposed in the reflective shell 400.

[0079] A coupling tube 1111 is provided at the end of the feed core 110. The coupling tube 1111 and the feed core 110 can be an integrally formed structure, which can be integrally formed by casting, forging, stamping or die-casting. A feed pin 211 is provided at the output end of the feed network 200. The feed pin 211 is at least partially inserted into the coupling tube 1111 for contactless coupling feeding.

[0080] Based on the above antenna device, an embodiment of the present application further discloses a communication device, and the disclosed communication device includes the above antenna device.

[0081] In summary, the antenna device and the communication device including the antenna device provided in the embodiments of the present application can reduce the number of solder joints between the radiation component 100 and the feeding network 200, thereby ensuring the antenna intermodulation index and stability.

[0082] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An antenna device, comprising: Radiating element (100) and feeding network (200); The radiation component (100) has a first coupling structure (111); The feed network (200) comprises a second coupling structure (210); One of the first coupling structure (111) and the second coupling structure (210) is provided with a cavity, and the other is provided with an inserting portion, at least part of the inserting portion is provided in the cavity, and a first gap is provided between the inserting portion and the inner wall of the cavity.

2. The antenna device according to claim 1, wherein: The first coupling structure (111) comprises a coupling tube (1111), and the lumen of the coupling tube (1111) forms the cavity; The second coupling structure (210) comprises a feed needle (211), and the feed needle (211) is connected to the output end of the feed network (200); One end of the feed needle (211) facing away from the output end of the feed network (200) is inserted into the coupling tube (1111), and the first gap is provided between the outer wall of the feed needle (211) and the tube wall of the coupling tube (1111).

3. The antenna device according to claim 1, wherein: The first gap is filled with a first isolation medium (310), and the first isolation medium (310) separates the plug-in portion from the inner wall of the cavity.

4. The antenna device according to claim 1, wherein: The antenna device further comprises a reflective shell (400), the feed network (200) is arranged inside the reflective shell (400), and the radiation component (100) is arranged outside the reflective shell (400); The side wall of the reflective shell (400) is provided with an avoidance hole (410), and the first coupling structure (111) or the second coupling structure (210) passes through the avoidance hole (410).

5. The antenna device according to claim 4, wherein: The radiation component (100) is connected to one of the side walls of the reflective shell (400), and the surface of the side wall located outside the reflective shell (400) is a reflection surface for reflecting electromagnetic wave signals; The avoidance hole (410) is opened on the side wall.

6. The antenna device according to claim 4, wherein: The radiation component (100) comprises a feed core (110) provided with the first coupling structure (111), a support balun (120), and a radiation unit (130) connected to the support balun (120); The feed core (110) is disposed in the supporting balun (120) and is electrically connected to the radiation unit (130); The supporting balun (120) is connected to the reflective housing (400).

7. The antenna device according to claim 6, wherein: The supporting balun (120) is provided with a first mounting hole (121), and the side wall of the reflecting housing (400) is provided with a second mounting hole (420); The first mounting hole (121) and the second mounting hole (420) are arranged correspondingly, and A fastener (500) is provided therethrough.

8. The antenna device according to claim 6, wherein: The antenna device further comprises a mounting member (600), wherein the mounting member (600) comprises a first clamping structure (610) and a second clamping structure (620); The supporting balun (120) is provided with a third clamping structure (122), and the third clamping structure (122) is clamped and matched with the first clamping structure (610); The reflective shell (400) is provided with a fourth clamping structure (430), and the fourth clamping structure (430) is clamped and matched with the second clamping structure (620).

9. The antenna device according to claim 6 or 8, wherein: The supporting balun (120) is provided with a third coupling structure, and the side wall of the reflecting housing (400) is provided with a fourth coupling structure; One of the third coupling structure and the fourth coupling structure is a boss (123), and the other is a groove (440); the boss (123) is arranged in the groove (440), and a second gap is provided between the outer wall of the boss (123) and the inner wall of the groove (440).

10. The antenna device according to claim 9, wherein: The second gap is filled with a second isolation medium (320), and the second isolation medium (320) separates the outer wall of the boss (123) from the inner wall of the groove (440).

11. The antenna device according to claim 4, wherein: The antenna device further comprises a fixing bracket (700), wherein the fixing bracket (700) is arranged in the reflective housing (400); The feed network (200) is arranged on the fixing bracket (700).

12. The antenna device according to claim 1, wherein: The antenna device comprises a plurality of the radiation components (100), and the feed network (200) comprises a plurality of the second coupling structures (210); The first coupling structures (111) of each of the plurality of radiation components (100) respectively correspond to and cooperate with the plurality of the second coupling structures (210).

13. A communication device, comprising the antenna device according to any one of claims 1 to 12.

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