Base station antenna and antenna structure

Abstract

This invention relates to a base station antenna and antenna structure. The antenna structure includes a radiating element, a reflector, a coupling element, and a feed transmission line. The radiating element includes a radiating element and a feed element, with one end of the feed element coupled and fed to the radiating element. The reflector has a first surface and a second surface, and the radiating element is fixed on the first surface of the reflector. The coupling element is fixed on the second surface of the reflector and has a coupling slot, and the coupling element is electrically connected to the radiating element. The feed transmission line uses the coupling slot to couple the outer conductor of the feed transmission line to the coupling element, and the inner core of the feed transmission line is electrically connected to the feed element. Electroplating of the radiating element and the coupling element is unnecessary, saving material costs and making the manufacturing process more environmentally friendly. Furthermore, the coupling and feeding connection can be achieved without welding the outer conductor of the feed transmission line to the radiating element, facilitating assembly, improving production efficiency, and making the manufacturing process more environmentally friendly.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a base station antenna and antenna structure. Background Technology

[0002] The radiating elements of an antenna structure are typically fabricated using die casting or sheet metal methods, while the feed network usually uses coaxial cables. To weld the coaxial cable to the radiating element, specifically, the outer conductor of the coaxial cable needs to be welded to the balun of the radiating element. Therefore, the surface of the radiating element needs to be electroplated, which not only increases material costs but also affects production efficiency and is environmentally unfriendly. Summary of the Invention

[0003] Therefore, it is necessary to provide a base station antenna and antenna structure to address the problems of high material costs, low production efficiency, and environmentally unfriendly production processes.

[0004] The technical solution is as follows:

[0005] On the one hand, an antenna structure is provided, including:

[0006] A radiating element, comprising a radiating oscillator and a feeding element;

[0007] A reflector, wherein the reflector has a first surface and a second surface disposed opposite to each other, and the radiating oscillator is disposed on the first surface;

[0008] A coupling element is disposed on the second surface, the coupling element is provided with a coupling groove, and the coupling element is electrically connected to the radiating oscillator;

[0009] A power supply transmission line, comprising an outer conductor and an inner core, wherein the outer conductor is coupled to the coupling element through the coupling slot, and the inner core is electrically connected to the power supply element.

[0010] The technical solution will be further explained below:

[0011] In one embodiment, the size parameters of the coupling element are related to the impedance matching of the radiating element.

[0012] In one embodiment, the coupling element further includes an insulating sleeve fitted onto the outer wall of the power supply transmission line, and the outer wall of the insulating sleeve is in contact with the inner wall of the coupling groove.

[0013] In one embodiment, the thickness of the insulating sleeve is 0.05 mm to 0.5 mm.

[0014] In one embodiment, the length of the coupling slot is L, and L < λ / 6, where λ is the free-space wavelength of the lowest operating frequency.

[0015] In one embodiment, the length of the coupling groove is positively correlated with the thickness of the insulating sleeve.

[0016] In one embodiment, the radiating oscillator, the reflector, and the coupling element are electrically connected to a common ground.

[0017] In one embodiment, the radiating element is provided with a first connection hole, the reflector is provided with a second connection hole corresponding to and communicating with the first connection hole, the coupling element is provided with a third connection hole corresponding to and communicating with the second connection hole, and the antenna structure further includes a connector, the connector being fastened to the first connection hole, the second connection hole and the third connection hole and electrically connecting the coupling element, the reflector and the radiating element.

[0018] In one embodiment, the connector is a threaded part or a plug-in part.

[0019] In one embodiment, the power supply transmission line is configured as a coaxial cable.

[0020] In one embodiment, the central axis of the coupling groove is parallel to the second surface.

[0021] In one embodiment, the power supply element is a nickel silver sheet; or, the power supply element includes an aluminum alloy sheet and a connecting nickel silver sheet disposed at the bottom end of the aluminum alloy sheet for connecting to the inner core.

[0022] In one embodiment, the radiating oscillator is made of die-cast aluminum alloy or integrally formed sheet metal; and / or the coupling element is made of die-cast aluminum alloy or integrally formed sheet metal.

[0023] In one embodiment, the reflector is provided with a through hole for the power supply element to pass through, and the coupling element is also provided with a connecting cavity corresponding to and communicating with the through hole for the power supply element to be inserted. The connecting cavity is connected to the coupling groove, so that the inner core of the power supply transmission line can extend into the connecting cavity and be electrically connected to the power supply element.

[0024] In one embodiment, the outline of the coupling groove matches the outline of the power supply transmission line, and the coupling element has an arc-shaped opening communicating with the coupling groove along the radial direction of the coupling groove.

[0025] In one embodiment, there are at least two arc-shaped openings, which are spaced apart along the axial direction of the coupling groove, with the arc-shaped openings facing the second surface and / or facing away from the second surface.

[0026] On the other hand, a base station antenna is provided, including the antenna structure described above.

[0027] The base station antenna and antenna structure of the above embodiments achieve coupling power supply to the entire radiating unit by mounting the radiating element of the radiating unit on the first surface of the reflector and mounting the coupling element on the second surface of the reflector, making the coupling element, the reflector and the radiating element electrically connected to each other; and by coupling slots on the coupling element to couple the outer conductor of the feed transmission line with the coupling element, and to electrically connect the inner core of the feed transmission line with the feed element. This eliminates the need for electroplating of the radiating element and the coupling element, saving material costs and making the manufacturing process more environmentally friendly. Furthermore, the coupling power supply connection can be achieved without welding the outer conductor of the feed transmission line to the radiating unit, making assembly easier, improving production efficiency and making the manufacturing process more environmentally friendly. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of an antenna structure according to one embodiment;

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

[0032] Figure 3 for Figure 1 Exploded view of the antenna structure;

[0033] Figure 4 for Figure 1 A schematic diagram of the coupling element of an antenna structure according to one embodiment;

[0034] Figure 5 for Figure 4 A schematic diagram of the coupling element from another perspective;

[0035] Figure 6 for Figure 1 A schematic diagram of another embodiment of the coupling element of the antenna structure;

[0036] Figure 7 for Figure 6 A schematic diagram of the coupling element from another perspective;

[0037] Figure 8 This is a standing wave curve of the transmission line in the coupling section between the coupling slot and the feed transmission line in a high-frequency antenna.

[0038] Figure 9 This is a standing wave curve diagram of a high-frequency antenna in which the radiating element is mounted on a reflector.

[0039] Figure 10 This is a standing wave curve diagram of the antenna structure in a high-frequency antenna;

[0040] Figure 11 This is a standing wave curve of the transmission line in the coupling section between the coupling slot and the feed transmission line in a low-frequency antenna.

[0041] Figure 12 The standing wave curve of the radiating element in a low-frequency antenna mounted on a reflector.

[0042] Figure 13 This is a standing wave curve diagram of the antenna structure in a low-frequency antenna.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100, Radiation unit; 110, Radiation oscillator; 120, Feeding element; 200, Reflector; 210, First surface; 220, Second surface; 300, Coupling element; 310, Coupling groove; 320, Third connecting hole; 330, Connecting cavity; 340, Arc-shaped opening; 400, Feeding transmission line; 500, Insulating sleeve. Detailed Implementation

[0045] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0046] like Figures 1 to 3 As shown, in one embodiment, an antenna structure is provided, including a radiating element 100, a reflector 200, a coupling element 300, and a feed transmission line 400.

[0047] The radiating unit 100 is used for radiating and receiving signals. The radiating unit 100 includes a radiating oscillator 110 and a feeding element 120.

[0048] In this embodiment, one end of the power feeding element 120 is electrically connected to the radiating oscillator 110 by means of coupled power feeding.

[0049] Specifically, the radiating oscillator 110 includes two sets of orthogonally polarized dipoles, and the feeding element 120 includes two orthogonally arranged feeding plates that feed the two sets of dipoles respectively, that is, one feeding plate is used to couple and feed one set of dipoles.

[0050] More specifically, each set of dipoles includes two spaced-apart radiating arms, and both radiating arms of a set of dipoles are provided with coupling holes for the feed plate to pass through.

[0051] The radiating oscillator 110 can be manufactured by die casting or sheet metal forming, and can be made of materials such as aluminum alloy, without the need for electroplating.

[0052] The power supply element 120 can be made of nickel silver or aluminum alloy without electroplating. For example, the power supply element 120 can be a nickel silver sheet; or, the power supply element 120 includes an aluminum alloy sheet and a connecting nickel silver sheet located at the bottom of the aluminum alloy sheet for connecting the inner core, thereby enabling the inner core and the power supply element 120 to be connected by welding or other means.

[0053] The reflector 200 has a first surface 210 and a second surface 220 arranged opposite to each other, and the radiating oscillator 110 is fixed on the first surface 210 of the reflector 200 by means of snap-fit ​​or screw connection.

[0054] The coupling element 300 is fixed to the second surface 220 of the reflector 200 by means of snap-fit ​​or screw connection, so that the coupling element 300 and the radiating oscillator 110 are located on opposite sides of the reflector 200. The coupling element 300 is provided with a coupling groove 310, and the coupling element 300 and the radiating oscillator 110 are electrically connected to each other.

[0055] Optionally, the coupling element 300 can be manufactured by die casting or sheet metal forming, and can be made of materials such as aluminum alloy, without the need for electroplating.

[0056] The power supply transmission line 400 includes an outer conductor and an inner core. The outer conductor is assembled and connected to the coupling element 300 through a coupling slot 310, thereby achieving coupling between the outer conductor and the coupling element 300. The inner core is electrically connected to the power supply element 120, thereby enabling signal transmission between the power supply transmission line 400 and the power supply element 120.

[0057] Optionally, the power supply transmission line 400 can be in the form of a coaxial cable. The coaxial cable can be assembled and connected to the coupling slot 310 by means of snap-fit ​​or other methods, so that the outer conductor of the coaxial cable can be coupled with the coupling element 300.

[0058] The antenna structure of the above embodiment achieves coupled feeding of the entire radiating unit 100 by mounting the radiating element 110 of the radiating unit 100 on the first surface 210 of the reflector 200 and the coupling element 300 on the second surface 220 of the reflector 200, and making the coupling element 300, the reflector 200 and the radiating element 110 electrically connected to each other; and by coupling groove 310 on the coupling element 300, the outer conductor of the feed transmission line 400 is coupled to the coupling element 300, and the inner core of the feed transmission line 400 is electrically connected to the feed element 120. This eliminates the need for electroplating of the radiating element 110 and the coupling element 300, saving material costs and making the manufacturing process more environmentally friendly. Furthermore, the coupled feeding connection can be achieved without welding the outer conductor of the feed transmission line 400 to the radiating unit 100, making assembly easier, improving production efficiency and making the manufacturing process more environmentally friendly.

[0059] Traditional antenna structures require electroplating of the radiating element 100 and welding to connect the outer conductor of the coaxial cable to the balun of the radiating element 100. This not only increases operating costs and pollutes the environment, but also results in numerous solder joints, low assembly efficiency, and potential intermodulation issues. Furthermore, electroplating often employs surface tin plating, which has low conductivity, leading to increased metal loss and reduced efficiency of the radiating element 100. The antenna structure of this embodiment eliminates the need for electroplating of the radiating element 100, reducing operating costs and improving environmental friendliness. It also features lower metal loss, higher efficiency of the radiating element 100, fewer solder joints, improved assembly efficiency, and ensures stable and reliable intermodulation.

[0060] Furthermore, the dimensional parameters of the coupling element 300 are related to the impedance matching of the radiating element 100. By optimizing the parameters of the radiating element 100 and the coupling part, the coupling element 300 can be miniaturized, while also achieving better impedance matching for the radiating element 100.

[0061] In one embodiment, the radiating unit 100 is a high-frequency oscillator with an operating frequency band of 1427MHz to 2690MHz and a relative bandwidth of approximately 45%. The coupling slot 310 of the coupling element 300 has a length of 15mm, approximately 0.07λ, where λ is the free-space wavelength at a frequency of 1427MHz. The insulating sleeve 500 has a thickness of 0.2mm.

[0062] like Figures 8 to 10As shown, in one embodiment, the maximum standing wave ratio (SWR) of the transmission line of the coupling portion of the coupling slot 310 and the feed transmission line 400 in the high-frequency antenna is 1.23, and the maximum SWR of the radiating element 100 mounted on the reflector 200 is 1.42. After combining the radiating element 100 and the coupling element 300 and optimizing the radiating element 100, the SWR of the antenna structure in the operating frequency band is less than 1.3.

[0063] In one embodiment, the radiating element 100 is a low-frequency oscillator with an operating frequency band of 698MHz to 960MHz and a relative bandwidth of approximately 32%. The coupling slot 310 of the coupling element 300 has a length of 25mm, approximately 0.06λ, where λ is the free-space wavelength at a frequency of 698MHz. The insulating sleeve 500 has a thickness of 0.2mm.

[0064] like Figures 11 to 13 As shown, in one embodiment, the maximum standing wave ratio (SWR) of the transmission line of the coupling portion of the coupling slot 310 and the feed transmission line 400 in the low-frequency antenna is 1.24, and the maximum SWR of the radiating element 100 mounted on the reflector 200 is 1.39. After combining the radiating element 100 and the coupling element 300 and optimizing the radiating element 100, the SWR of the antenna structure in the operating frequency band is less than 1.36.

[0065] like Figures 2 to 7 As shown, the antenna structure also includes an insulating sleeve 500. The insulating sleeve 500 is fitted onto the outer wall of the feed transmission line 400, and the outer wall of the insulating sleeve 500 is in contact with the inner wall of the coupling groove 310. Thus, by fitting the insulating sleeve 500 onto the outer wall of the feed transmission line 400 and then connecting the insulating sleeve 500 to the coupling element 300 through the coupling groove 310, the outer conductor of the feed transmission line 400 is coupled to the coupling element 300, eliminating the need for soldering the outer conductor of the feed transmission line 400 and making intermodulation more stable and reliable.

[0066] The outer wall of the insulating sleeve 500 and the inner wall of the coupling groove 310 can be fitted together by means of snap-fitting, pressing or bonding, as long as the outer wall of the insulating sleeve 500 and the inner wall of the coupling groove 310 are fitted together.

[0067] Optionally, the length of the coupling slot 310 is L, and L < λ / 6, where λ is the free-space wavelength of the lowest operating frequency. This enables miniaturization of the coupling element 300.

[0068] Optionally, the thickness of the insulating sleeve 500 is 0.05mm to 0.5mm. Since the coupling portion between the coupling slot 310 and the feed transmission line 400 is not an ideal 50-ohm transmission line, by utilizing the principle of partial cancellation of reflected waves, the parameters of the radiating unit 100 and the coupling portion can be optimized, enabling miniaturization of the coupling element 300. Simultaneously, this also allows the radiating unit 100 to achieve better impedance matching. Preferably, the thickness of the insulating sleeve 500 is 0.2mm to 0.5mm, resulting in a shorter length of the coupling slot 310 and easier assembly.

[0069] Optionally, the length of the coupling groove 310 is positively correlated with the thickness of the insulating sleeve 500. The specific length of the coupling groove 310 and the specific thickness of the insulating sleeve 500 can be flexibly adjusted or designed according to actual usage needs, as long as it can achieve miniaturization of the coupling element 300 and at the same time enable the radiation unit 100 to obtain better impedance matching.

[0070] It should be noted that the length of the coupling groove 310 refers to the axial extension length of the coupling groove 310.

[0071] The radiating oscillator 110, the reflector 200, and the coupling element 300 are electrically connected to a common ground, which can be achieved by screwing or plugging.

[0072] In one embodiment, the radiating element 110 has a first connecting hole (not shown), the reflector 200 has a second connecting hole (not shown) corresponding to and communicating with the first connecting hole, and the coupling element 300 has a third connecting hole 320 corresponding to and communicating with the second connecting hole. Furthermore, the antenna structure also includes a connector (not shown), which is fastened to the first connecting hole, the second connecting hole, and the third connecting hole 320, and electrically connects the coupling element 300, the reflector 200, and the radiating element 110. Thus, the coupling element 300, the reflector 200, and the radiating element 110 are connected and fixed through the connector, achieving electrical conduction. Then, the coupling slot 310 allows the outer conductor of the feed transmission line 400 to couple with the coupling element 300, thereby achieving coupling between the outer conductor of the feed transmission line 400 and the radiating element 110, eliminating the need for electroplating treatment of the radiating element 110 and the coupling element 300.

[0073] Optionally, the connector can be in the form of a screw or other threaded part, and the first connecting hole, the second connecting hole and the third connecting hole 320 can be in the form of threaded holes. By connecting the screw or other threaded part with the threaded hole, not only can the assembly connection between the coupling element 300, the reflector 200 and the radiating oscillator 110 be realized, but also the electrical conduction between them can be realized.

[0074] Of course, in other embodiments, the connector can also be in the form of a pin or other plug-in component. The first connecting hole, the second connecting hole, and the third connecting hole 320 can be in the form of a socket. By connecting the pin or other plug-in component to the socket, not only can the assembly connection between the coupling element 300, the reflector 200, and the radiating vibrator 110 be realized, but also the electrical conduction between them can be realized.

[0075] like Figures 3 to 7 As shown, the reflector 200 is further provided with a through hole (not shown) for the feeding element 120 to pass through, and the coupling element 300 is also provided with a connecting cavity 330 corresponding to the through hole for the feeding element 120 to be inserted. The connecting cavity 330 is connected to the coupling groove 310, so that the inner core of the feeding transmission line 400 can extend into the connecting cavity 330 and be electrically connected to the feeding element 120. In this way, the radiating oscillator 110 is fixed on the first surface 210 of the reflector 200, and the coupling element 300 is fixed on the second surface 220 of the reflector 200, so that the feeding element 120 extends into the connecting cavity 330 after passing through the through hole, and then the outer conductor of the feeding transmission line 400 is coupled with the coupling element 300 through the coupling groove 310, so that the inner core of the feeding transmission line 400 extends into the connecting cavity 330, and finally the inner core of the feeding transmission line 400 is electrically connected to the feeding element 120.

[0076] The number of connecting cavities 330 matches the number of power feeding elements 120. The number of power feeding transmission lines 400 matches the number of power feeding elements 120.

[0077] The electrical connection between the inner core of the power supply transmission line 400 and the power supply element 120 can be achieved by direct welding, by riveting, or by coupling.

[0078] To ensure stable and reliable coupling between the outer conductor of the power supply transmission line 400 and the coupling element 300, such as... Figures 5 to 7 As shown, in one embodiment, the contour of the coupling groove 310 matches the contour of the feed transmission line 400, and the coupling element 300 has an arc-shaped opening 340 communicating with the coupling groove 310 along the radial direction of the coupling groove 310. This makes the coupling groove 310 a semi-open structure, i.e., the circumferential sidewall of the coupling groove 310 has an arc-shaped opening 340, which not only facilitates the insertion of the feed transmission line 400 into the coupling groove 310 to achieve coupling between the outer conductor of the feed transmission line 400 and the coupling element 300, but also avoids resonance.

[0079] The arc-shaped opening 340 can be positioned away from the second surface 220 or facing the second surface 220.

[0080] Furthermore, there are at least two arc-shaped openings 340, which are spaced apart along the axial direction of the coupling groove 310. The arc-shaped openings 340 face the second surface 220 and / or face away from the second surface 220. In this way, the arc-shaped openings 340 can be flexibly opened according to actual processing conditions or usage needs, which facilitates the insertion of the power supply transmission line 400 into the coupling groove 310 and enables a stable and reliable assembly connection between the power supply transmission line 400 and the coupling element 300, ensuring a stable coupling between the outer conductor of the power supply transmission line 400 and the coupling element 300.

[0081] Simultaneously, the central axis of the coupling slot 310 can be parallel to the second surface 220. Thus, after the feed transmission line 400 is inserted into the coupling slot 310, it is positioned parallel to the second surface 220, eliminating the need for vertical bending of the feed transmission line 400. This simplifies assembly and facilitates wiring of the feed transmission line 400. Furthermore, it eliminates the need for soldering the outer conductor of the feed transmission line 400 to achieve coupling with the coupling element 300, resulting in more stable and reliable intermodulation. It also allows the inner core of the feed transmission line 400 to extend smoothly to its electrical connection with the feed element 120, providing sufficient installation space and ensuring a more stable and reliable electrical connection.

[0082] In one embodiment, a base station antenna is also provided, including the antenna structure of any of the above embodiments.

[0083] The base station antenna of the above embodiment does not require electroplating of the radiating element 100, which reduces the cost of use, is environmentally friendly, has low metal loss, higher efficiency of the radiating element 100, and fewer solder joints, which improves production efficiency and ensures the stability and reliability of intermodulation.

[0084] It should be noted that "a certain body" or "a certain part" can be a portion of the corresponding "component," meaning that "a certain body" or "a certain part" is integrally formed and manufactured with the "other parts of the component"; or it can be an independent component that can be separated from the "other parts of the component," meaning that "a certain body" or "a certain part" can be manufactured independently and then combined with the "other parts of the component" to form a whole. The expression of "a certain body" or "a certain part" in this application is only one embodiment for ease of reading, and is not intended to limit the scope of protection of this application. Any technical solution that includes the above features and has the same function should be understood as an equivalent technical solution of this application.

[0085] It should be noted that the components included in the terms "unit," "component," "mechanism," and "device" of this application can be flexibly combined, enabling modular production according to actual needs and facilitating modular assembly. The division of the above-mentioned components in this application is merely one embodiment for ease of reading and is not intended to limit the scope of protection of this application. Any solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this application.

[0086] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The term "and / or" used in this invention includes any and all combinations of one or more of the related listed items.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0088] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0089] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0090] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. Furthermore, when a component is considered to be "fixed transmission connection" to another component, the two can be fixed in a detachable or non-detachable manner, as long as power transmission can be achieved, such as sleeve, snap-fit, integral molding, welding, etc., which can be achieved in the prior art and will not be elaborated here. When a component is perpendicular or approximately perpendicular to another component, it means that the two are ideally perpendicular, but due to the influence of manufacturing and assembly, there may be a certain degree of perpendicularity error. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0091] It should also be understood that, in interpreting the connection or positional relationships of components, although not explicitly described, connection and positional relationships are interpreted to include a range of error, which should be within the acceptable deviation range of a specific value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0092] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An antenna structure, characterized by The antenna structure comprises: a radiation unit, which comprises a radiation oscillator and a feed element; a reflecting plate, which is provided with a first surface and a second surface arranged oppositely, and the radiation oscillator is arranged on the first surface; a coupling element, which is arranged on the second surface, and the coupling element is provided with a coupling slot and is electrically connected with the radiation oscillator; a feed transmission line, which comprises an outer conductor and an inner core, and the outer conductor is coupled with the coupling element through the coupling slot, and the inner core is electrically connected with the feed element; the radiation oscillator, the reflecting plate and the coupling element are electrically connected by screwing or inserting to be grounded.

2. The antenna structure of claim 1, wherein, The size parameters of the coupling element are related to the impedance matching of the radiation unit.

3. The antenna structure of claim 1, wherein, The coupling element further comprises an insulating sleeve, which is sleeved on the outer wall of the feed transmission line, and the outer wall of the insulating sleeve is matched with the inner wall of the coupling slot.

4. The antenna structure of claim 3, wherein, The thickness of the insulating sleeve is 0.05mm-0.5mm.

5. The antenna structure of claim 3, wherein, The length of the coupling slot is L, and L<λ / 6, wherein λ is the free space wavelength of the lowest working frequency.

6. The antenna structure of claim 3, wherein, The length of the coupling slot is positively correlated with the thickness of the insulating sleeve.

7. The antenna structure of claim 1, wherein, The radiation oscillator is provided with a first connecting hole, the reflecting plate is provided with a second connecting hole corresponding to the first connecting hole, the coupling element is provided with a third connecting hole corresponding to the second connecting hole, and the antenna structure further comprises a connecting piece, which is fastened with the first connecting hole, the second connecting hole and the third connecting hole and electrically connects the coupling element, the reflecting plate and the radiation oscillator.

8. The antenna structure of claim 7, wherein, The connecting piece is a threaded piece or an inserting piece.

9. The antenna structure of claim 1, wherein, The feed transmission line is a coaxial cable.

10. The antenna structure of claim 1, wherein, The central axis of the coupling slot is parallel to the second surface.

11. The antenna structure of claim 1, wherein, The feed element is a white brass sheet, or the feed element comprises an aluminum alloy sheet and a white brass sheet arranged at the bottom end of the aluminum alloy sheet and used for connecting the inner core.

12. The antenna structure of claim 1, wherein, The radiation oscillator is integrally formed by aluminum alloy die casting or sheet metal, and / or the coupling element is integrally formed by aluminum alloy die casting or sheet metal.

13. The antenna structure of claim 1, wherein, The reflecting plate is provided with a through hole for the feed element to pass through, the coupling element is further provided with a communication cavity corresponding to the through hole for the feed element to insert, the communication cavity is communicated with the coupling slot, so that the inner core of the feed transmission line can be inserted into the communication cavity and electrically connected with the feed element.

14. The antenna structure of any one of claims 1 to 13, wherein, The profile of the coupling slot is matched with the profile of the feed transmission line, and along the radial direction of the coupling slot, the coupling element is provided with an arc-shaped opening communicated with the coupling slot.

15. The antenna structure of claim 14, wherein, The arc-shaped opening is at least two, and the at least two arc-shaped openings are arranged at intervals along the axial direction of the coupling slot, and the arc-shaped opening faces the second surface and / or the arc-shaped opening deviates from the second surface.

16. A base station antenna, comprising: The antenna structure comprises any one of claims 1-15.

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