WO2020192636A1

WO2020192636A1 - Antenna housing and base station antenna

Info

Publication number: WO2020192636A1
Application number: PCT/CN2020/080733
Authority: WO
Inventors: 周跃群; 崔鹤; 邸允会; 何鑫
Original assignee: 华为技术有限公司
Priority date: 2019-03-25
Filing date: 2020-03-23
Publication date: 2020-10-01
Also published as: CN111740211A

Abstract

Provided are an antenna housing and a base station antenna. Provided are an antenna housing and a base station antenna. The antenna housing comprises a first housing body for transmitting electromagnetic waves radiated by an antenna and a second housing body for fixing the antenna, wherein the first housing body comprises a first connecting portion and a second connecting portion opposite each other; the second housing body comprises a third connecting portion and a fourth connecting portion opposite each other; the first connecting portion is connected to the third connecting portion; the second connecting portion is connected to the fourth connecting portion; the first housing body and the second housing body enclose an accommodating space for accommodating the antenna; the first housing body comprises multiple layers of panels arranged at intervals; the multiple layers of panels are positioned between the first connecting portion and the second connecting portion; and the multiple layers of panels cover a radiating surface of the antenna. In the present application, by means of covering the radiating surface of the antenna with the multiple layers of panels, seamless coverage of the antenna is realized, and the isolation of the antenna is improved, thereby improving the performance of the antenna.

Description

Radome and base station antenna

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on March 25, 2019, the application number is 201910229077.9, and the application name is "a radome and base station antenna", the entire content of which is incorporated into this application by reference .

Technical field

This application relates to the field of communication technology, and in particular to a radome and a base station antenna.

Background technique

With the rapid development of communication technology, base station antennas as key components are becoming more and more important. Because outdoor antennas are usually placed in the open to work, they are directly attacked by storms, ice, snow, sand, dust, and solar radiation in the natural world, resulting in reduced antenna accuracy, shorter life span, and poor working reliability. In order to protect the antenna from the external environment, a radome is usually placed on the antenna.

At present, in the fifth-generation communication network (5G), in order to improve the spectrum utilization and channel capacity of the communication system, most of the base station antennas use Massive MIMO antennas. Massive MIMO antenna is composed of a large number of antenna elements, so the radome is located in front of the antenna element, which will absorb and reflect the electromagnetic waves radiated by the antenna element, thereby directly or indirectly affecting the isolation between the antenna element and the element. This in turn affects the performance of the antenna and, to a certain extent, the communication quality of the wireless communication system.

Summary of the invention

The present application provides a radome and a base station antenna to achieve seamless coverage of the antenna, improve antenna isolation, and thereby improve antenna performance.

In a first aspect, the present application provides a radome. The radome includes: a first cover for transmitting electromagnetic waves radiated by the antenna and a second cover for fixing the antenna, the first cover including an opposite first cover The connecting portion and the second connecting portion, the second cover body includes a third connecting portion and a fourth connecting portion opposite, the first connecting portion is connected to the third connecting portion, the second connecting portion is connected to the fourth connecting portion, the first cover The body and the second cover body enclose an accommodating space for accommodating the antenna. In this way, the first cover body and the second cover body are combined to form the aforementioned radome, wherein the first cover body includes multilayer panels arranged at intervals, The multi-layer panel is located between the first connection part and the second connection part of the first cover, and the multi-layer panel covers the radiation surface of the antenna.

In this application, by covering the radiation surface of the antenna with a multi-layer panel, seamless coverage of the antenna is achieved, antenna isolation is improved, and antenna performance is improved.

Based on the first aspect, in some possible embodiments, the multi-layer panel in the first cover is made by an integral molding process.

In the present application, the first cover is made by an integral molding process, which can eliminate a large number of supports arranged above the antenna unit for supporting the dielectric plate, simplify the antenna structure, and can also reduce the assembly operation of the antenna and facilitate the antenna installation.

Based on the first aspect, in some possible implementations, the outermost panel in the multi-layer panel includes a straight first part, a second part extending perpendicularly from the first end of the first part toward the first direction, and the first part The second end of the second end extends perpendicularly to the third part of the first direction, the first end is opposite to the second end, that is, the outermost panel

Shape, the other panels in the multilayer panel are flat panels.

Based on the first aspect, in some possible implementations, the connecting part of the first part and the second part is chamfered, and the connecting part of the first part and the third part is chamfered. In this way, the wind load capacity of the radome can be improved. In this application, the chamfer can be a chamfered angle to further improve the wind load capacity of the radome.

Based on the first aspect, in some possible implementations, the multi-layer panel is a curved panel, and the first cover has an arc shape to improve the wind load capacity of the radome.

Based on the first aspect, in some possible implementations, the distance between two adjacent layers of the multilayer panel is 0.02 times to 0.25 times the working wavelength. The working wavelength mentioned here may be the wavelength of electromagnetic waves radiated by the antenna.

Based on the first aspect, in some possible implementations, the multilayer panel has two layers, that is, the first cover has a two-layer structure.

Based on the first aspect, in some possible implementations, when the first cover has a double-layer structure, the first panel in the two-layer panel is 0.25 times the operating wavelength away from the radiation surface of the antenna, and the second in the two-layer panel The distance between the panel and the radiating surface of the antenna is 0.3 times the working wavelength to 0.5 times the working wavelength.

Based on the first aspect, in some possible implementations, the panel thickness of the multilayer panel is 1 mm to 4 mm, and the dielectric constant of the multilayer panel ranges from 2.5 to 5.

Based on the first aspect, in some possible implementation manners, the multi-layer panel is filled with gas between two adjacent layers of panels.

Based on the first aspect, in some possible implementations, reinforcing ribs for supporting the multi-layer panel are provided between two adjacent layers of the multi-layer panel to support each layer of the panel, which can improve the wind load capacity of the antenna and also It can strengthen the cover and prevent the cover from deforming.

Based on the first aspect, in some possible implementation manners, a fixing member for fixing the antenna is provided on the inner side wall of the second cover.

Based on the first aspect, in some possible implementation manners, the fixing member is a guide rail to facilitate the installation of the antenna in the radome.

Based on the first aspect, in some possible implementation manners, the radome is in a closed state in the cross-sectional direction to seal and protect the antenna.

In a second aspect, the present application provides a base station antenna. The base station antenna includes an antenna including an antenna array and a reflector. The antenna array includes a plurality of antenna units of the same frequency band and a feed network. The antenna array is arranged on the reflector, for example, MIMO Antenna, Massive MIMO antenna, etc.; as in the radome described in the first aspect above, the antenna is arranged in the radome, and the radome protects the antenna.

It should be understood that the second aspect of the present application is consistent with the technical solution of the first aspect of the present application, and the beneficial effects achieved by all aspects and corresponding feasible implementations are similar, and will not be repeated.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the following will describe the drawings that need to be used in the embodiments of the present application or the background art.

FIG. 1 is a schematic diagram of the architecture of a wireless communication system in an embodiment of the application;

FIG. 2 is a schematic structural diagram of a base station antenna in an embodiment of the application;

3 is a schematic diagram of the structure of the radome in an embodiment of the application;

FIG. 4 is a first structural diagram of the first cover in an embodiment of the application;

FIG. 5A is a first structural diagram of the outermost panel of the first cover in an embodiment of the application;

5B is a second structural diagram of the outermost panel of the first cover in the embodiment of the application;

Fig. 6 is a second structural diagram of the first cover in the embodiment of the application;

FIG. 7 is the third structural diagram of the first cover in the embodiment of the application;

8A is a schematic diagram 1 of the relative relationship between the first cover and the second cover in the embodiment of the application;

8B is a second schematic diagram of the relative relationship between the first cover and the second cover in the embodiment of the application;

9 is a schematic diagram of the structure of the radome in an embodiment of the application;

FIG. 10 is a schematic structural diagram of a base station antenna in an embodiment of the application;

FIG. 11 is a schematic diagram of the comparison of the isolation between the antenna units in the double-layer radome in the embodiment of the application and the conventional radome.

detailed description

The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. In the following description, reference is made to the accompanying drawings that form a part of the present application and illustrate specific aspects of the embodiments of the present application or specific aspects that can be used in the embodiments of the present application. It should be understood that the embodiments of the present application may be used in other aspects, and may include structural or logical changes not depicted in the drawings. Therefore, the following detailed description should not be understood in a restrictive sense, and the scope of the present application is defined by the appended claims. Further, it should be understood that, unless expressly stated otherwise, the features of the exemplary embodiments and/or aspects described herein can be combined with each other.

An embodiment of the application provides a wireless communication system. FIG. 1 is a schematic diagram of the architecture of the wireless communication system in an embodiment of the application. As shown in FIG. 1, the wireless communication system 10 may include a base station 11 and a user equipment (UE, User Equipment). ) 12. The base station 11 can communicate with the UE 12. It should be noted that the base station and UE included in the wireless communication system as shown in FIG. 1 are only an example. In the embodiment of the present application, the type and number of network elements further included in the wireless communication system, and the connection relationship between the network elements are not limited thereto.

The aforementioned wireless communication system may be a communication system that supports fourth generation (4G, Fourth Generation) access technology, such as LTE access technology; or, the communication system may also support fifth generation (5G, Fifth Generation) access technology The communication system, such as NR access technology; or, the communication system may also be a communication system supporting multiple wireless technologies, for example, a communication system supporting LTE technology and NR technology. In addition, the communication system can also be applied to future-oriented communication technologies.

The base station in Figure 1 may be a device on the access network side to support UE access to a wireless communication system. For example, it may be an evolved base station (eNB, evolved NodeB) in a 4G access technology communication system, and 5G access technology communication. The next generation base station (gNB, next generation NodeB), transmission and reception point (TRP, Transmission Reception Point), relay node (Relay Node), access point (AP, Access Point), etc. in the system.

The UE 12 in Figure 1 may be a device that provides voice or data connectivity to users, for example, it may also be called a terminal, a mobile station, a subscriber unit, a station (STAtion), or a terminal equipment (TE). , Terminal Equipment) etc. The UE can be a cellular phone, a personal digital assistant (PDA, Personal Digital Assistant), a wireless modem (modem), a handheld device (handheld), a laptop computer, a cordless phone, and a wireless Local loop (WLL, Wireless Local Loop) station or tablet computer (pad), etc. With the development of wireless communication technology, devices that can access the wireless communication system, communicate with the network side of the wireless communication system, or communicate with other devices through the wireless communication system can be the UE in the embodiments of the present application, such as , Terminals and cars in smart transportation, household equipment in smart homes, power meter reading equipment in smart grids, voltage monitoring equipment, environmental monitoring equipment, video monitoring equipment in smart security networks, cash registers, etc. In this embodiment of the application, the UE can communicate with the base station. The UE can be statically fixed or mobile.

In practical applications, the base stations in the above-mentioned wireless communication systems are often set outdoors. Outdoor environmental factors such as storms, ice, snow, sand, and solar radiation affect the antenna performance of the base stations, thereby affecting the communication quality of the wireless communication system. Figure 2 is a schematic structural diagram of a base station antenna in an embodiment of the application. As shown in Figure 2, in order to reduce the impact of the outdoor environment on the performance of the antenna, a radome 22 can be placed on the outside of the antenna 21, that is, the antenna 21 Wrapped in the radome 22. Further, although the radome provided on the outside of the antenna can reduce the influence of the outdoor environment on the antenna, since the antenna 21 includes multiple antenna units 211 of the same frequency band, when the antenna unit 211 in the radome 22 radiates electromagnetic waves, The electromagnetic waves radiated by each antenna unit 211 will generate coupling interference, which affects the antenna performance. Then, in order to reduce the interference between the antenna units and improve the antenna isolation, a loading sheet 23 is arranged above each antenna unit 211 and between the cover surface of the radome 22, so that the electromagnetic waves radiated by the antenna unit 211 are When passing through the loading sheet 23 above, different degrees of refraction will occur depending on the material, size, position, etc. of the loading sheet 23, so that the radiation range and radiation direction of electromagnetic waves will change accordingly, thereby reducing the antenna unit 211. Coupling and interference between the two, thereby improving antenna isolation. Generally, the loading sheet 23 can be made of materials such as polyoxymethylene (POM), glass fiber reinforced plastic, and epoxy resin.

Here, due to the spacing between the antenna units, the loading pieces correspond to the antenna units one-to-one, so there will be gaps between the loading pieces. When the antenna unit radiates electromagnetic waves, due to the gap between the loading plates, the electromagnetic waves still have a certain degree of coupling interference, which affects the performance of the antenna and further affects the communication quality of the wireless communication system.

In addition, because the loading sheet needs to be supported and fixed above the antenna unit, for antennas containing a large number of antenna elements, such as MIMO antennas and Massive MIMO antennas, a large number of loading sheets and supports cause the antenna assembly to be more complicated. higher cost.

In order to solve the above technical problems, the embodiments of the present application provide a radome, which can be applied to the base station in the above wireless communication system. While protecting the base station antenna, the antenna isolation is improved, the antenna performance is improved, and the wireless communication is improved. The communication quality of the system.

FIG. 3 is a schematic diagram of the structure of the radome in the embodiment of the application. As shown in FIG. 3, the above-mentioned radome 30 (shown by the solid line in FIG. 3) may include: a transparent antenna 33 (shown by the dashed line in FIG. 3) ) The first cover 31 for the radiated electromagnetic wave and the second cover 32 for fixing the antenna. The first cover 31 and the second cover 32 are connected, so that the first cover 31 and the second cover 32 form one An accommodating space for accommodating the antenna. Wherein, the first cover 31 includes multilayer panels 311 arranged at intervals, and the multilayer panels 311 cover the radiation surface 331 of the antenna.

Still referring to FIG. 3, the first cover 31 includes a first connecting portion 312 and a second connecting portion 313 opposite, and the second cover 32 includes a third connecting portion 321 and a fourth connecting portion 322 opposite to each other. The portion 312 is connected to the third connecting portion 321, and the second connecting portion 313 is connected to the fourth connecting portion 322, so that the first cover 31 and the second cover 32 are connected, and the first cover 31 and the second cover The body 32 encloses the aforementioned accommodation space. The multilayer panel 311 of the first cover 31 is located between the first connecting portion 312 and the second connecting portion 313.

It should be noted that the multi-layer panel can be a two-layer panel, a three-layer panel, a four-layer panel, etc. Those skilled in the art can design according to the actual needs of antenna isolation, and the embodiment of this application does not specifically limit it. .

It can be seen from the above that the first cover is a part of the radome, which may include a multi-layer panel formed by stacking a plurality of panels. There is a certain gap between adjacent panels. The first cover can cover the fixed inside the second cover. The radiating surface of the antenna allows the electromagnetic wave radiated by the antenna to propagate through the multilayer panel. It can be seen that by covering the radiating surface of the antenna with multi-layer panels arranged at intervals, seamless coverage of the antenna is achieved, thereby improving the isolation of the antenna, thereby improving the performance of the antenna, and improving the communication quality of the wireless communication system.

First, introduce the first cover.

In the embodiment of the present application, in order to achieve seamless coverage of the antenna, each layer of the above-mentioned multi-layer panel can be a whole panel or a panel formed by seamless splicing of multiple panels. The implementation of this application The examples are not limited.

Further, the multi-layer panels can be fixed together by fixing parts such as screws, snaps, etc., or can be fixed together by glue connection, hot melt connection, etc., thereby forming two opposite connection parts of the first cover, and then through this The two connecting parts connect the first cover and the second cover. For example, the radome is a double-layer radome, the first cover is a double-layer structure, and the multilayer panel is a double-layer panel. FIG. 4 is a structural schematic diagram 1 of the first cover in an embodiment of the application, see FIG. , The double-layer panel includes a first panel 41 and a second panel 42, the first panel 41 and the second panel 42 are fixed together with screws 43, such as the first end 421 of the second panel 42 and the first end of the first panel 41 411 is fixed together by screws 43 to form the first connecting part of the first cover, and the first connecting part is then connected to the third connecting part of the second cover. The second end 422 of the second panel 42 is connected to the first panel. The second ends 412 of 41 are first fixed together by screws 43 to form the second connecting portion of the first cover, and the first connecting portion is then connected to the fourth connecting portion of the second cover. Of course, the above-mentioned multi-layer panel can also be made by an integral molding process.

In the embodiment of the present application, since the multi-layer panels are fixed together by a fixing member or an integral molding process, a large number of support members arranged above the antenna unit for supporting the dielectric plate can be omitted, the antenna structure is simplified, and The assembly operation of the antenna can be reduced, and the antenna installation is convenient.

In order to adapt to different installation environments, the first cover can and is not limited to the following two shapes.

In the first shape, the first cover is rectangular as a whole. At this time, FIG. 5A is the first structural diagram of the outermost panel of the first cover in the embodiment of the application. See 5A, the most in the multilayer panel The outer panel 311a includes a straight first portion 51, a second portion 52 extending perpendicularly from the first end 511 of the first portion 51 in the first direction, and a second portion 52 extending perpendicularly from the second end 512 of the first portion 51 in the first direction. The third part 53. Here, the first end of the first part and the second end of the first part are opposite ends, and the first direction is the opposite direction of the antenna radiation direction.

When the first cover is in the first shape, as shown in Figure 5A, the outermost panel of the multi-layer panel is in the shape of "┌┐", and the other panels are flat plates. At this time, the other panels can be fixed by fixing members. In the second and third parts of the outermost panel.

In some possible implementations, in order to improve the wind load capacity of the radome, FIG. 5B is a second structural diagram of the outermost panel of the first cover in an embodiment of the application. See FIG. 5B, the outermost panel The connecting part 54 of the first part 51 and the second part 52 of 311a (shown in the dashed circle in the figure) is chamfered, and the connecting part 55 (shown in the dashed circle in the figure) of the first part 51 and the third part 53 is inverted angle. In practical applications, the chamfer at the connecting portion 54 and the connecting portion 55 may be a chamfered angle.

In the second shape, the first cover body is arc-shaped as a whole. At this time, FIG. 6 is a second structural diagram of the first cover body in the embodiment of the application. As shown in FIG. 6, the outermost panel 311a is a curved panel. The curvature of any position on the outermost deck is the same. The first end of the outermost panel (ie, the first connecting portion of the first cover) and the second end (ie, the second connecting portion of the first cover) are respectively opposite to the third connecting portion and the second end of the second cover. Four connections are connected.

Further, still referring to FIG. 6, other panels 311b in the multi-layer panel can also be curved panels, the curvature of any position on each curved panel is the same, and the spacing between any parts of two adjacent curved panels is the same. The first end and the second end of each layer of the panel are fixed together to form the first connecting portion 56 (shown in the dashed circle in the figure) and the second connecting portion 57 (shown in the dashed circle in the figure) of the first cover. , The first connecting part can be connected with the third connecting part of the second cover, and the second connecting part can be connected with the fourth connecting part of the second cover. Multi-layer panels using curved panels can improve the wind load capacity of the radome. As described above, each layer of curved panels can be fixed together by a fixing member or an integral molding process, and then connected with the second cover.

In the embodiments of the present application, the panel thickness of the multilayer panel described in the foregoing embodiment may be 1 mm to 4 mm, and the dielectric constant of each layer of the panel may be in the range of 2.5 to 5. Here, the multi-layer panel can be made of glass fiber reinforced plastic, polyvinyl chloride (PVC, PolyVinyl Chloride) and other materials.

In some possible implementations, gas may not be filled between two adjacent layers of panels in a multilayer panel, so that a vacuum is formed between two adjacent layers of panels; or, gas may be filled between two adjacent layers of panels, such as air. Of course, other gases can also be filled according to the working performance of the antenna, which is not specifically limited in the embodiment of the present application.

In some possible implementations, since the radome is often installed outdoors, in order to improve the wind load capacity of the antenna, and to strengthen the cover and prevent the cover from deforming, the two adjacent layers of the multilayer panel At least one reinforcing rib 71 for supporting the multi-layer panel is provided in between. For example, FIG. 7 is the third structural diagram of the first cover in the embodiment of the application. As shown in FIG. 7, the first cover 31 has a three-layer structure, and the first panel 311a, the second panel 311b, and the third panel 311c , Two reinforcing ribs 71 are provided between the first panel 311a and the second panel 311b, and one reinforcing rib 71 is provided between the second panel 311b and the third panel 311c. In the specific implementation process, those skilled in the art The number of reinforcing ribs can be determined by oneself according to different installation environments, and the embodiment of the present application does not specifically limit it.

In some possible implementations, in order to ensure the working performance of the antenna, the distance between two adjacent layers of the multilayer panel in the above-mentioned embodiment may be 0.02 times to 0.25 times the working wavelength. The working wavelength mentioned here The wavelength may be the wavelength at which the antenna radiates electromagnetic waves. For example, the distance between two adjacent layers of panels is denoted as d, and the wavelength of electromagnetic waves radiated by the antenna is denoted as λ, then dε[0.02λ,0.25λ]. In practical applications, the actual value of d can be based on the material and thickness of each panel, the distance between the innermost panel and the antenna's radiating surface, and the working performance of the antenna, such as the antenna pattern, isolation, standing wave It is determined by other parameters, and the embodiment of the present application does not make specific limitations.

For example, the radome is a double-layer radome, the first cover is a double-layer structure, and the multilayer panel is a double-layer panel. When the first cover is a double-layer structure, the first panel of the two-layer panel can be connected to the antenna The radiating surface is separated by 0.25λ, and the second panel of the two-layer panel, that is, the innermost panel, can be 0.3λ to 0.5λ away from the radiating surface of the antenna.

Next, introduce the second cover.

In the embodiment of the present application, the second cover body is connected with the first cover body to form the above-mentioned radome, and enclose an accommodating space, which can be used to accommodate a fixed antenna. Here, the second cover body may be a cover body connected to two opposite connection parts (the above-mentioned first connection part and second connection part) of the first cover body, or may be two opposite connection parts of the first cover body. The portion (the above-mentioned first connection portion and the second connection portion) extends in the opposite direction of the antenna radiation direction, that is, the cover formed in the first direction.

Specifically, when the second cover is a cover connected to the two opposite connecting parts of the first cover, the third and fourth connecting parts of the second cover can pass through the first cover of the first cover. The first connecting portion and the second connecting portion are detachably connected to the first cover body, or can be fixedly connected to the first cover body through the first connecting portion and the second connecting portion of the first cover body. If the first cover body and the second cover body are detachably connected, the first cover body and the second cover body can be detachably connected by means of screws, fasteners, etc., if the first cover body and the second cover body are Fixed connection, the first cover body and the second cover body can be fixed together by glue connection, hot melt connection, or the like. Of course, the first cover and the second cover can also be connected in other ways, which is not specifically limited in this application. When the second cover is a cover formed by extending the first connection portion and the second connection portion of the first cover in the first direction, the first cover and the second cover are integrally formed, and the first connection and The third connecting portion is connected, and the second connecting portion is connected with the fourth connecting portion.

In some possible embodiments, FIG. 8A is a schematic diagram 1 of the relative relationship between the first cover and the second cover in the embodiments of the application. See FIG. 8A, the second cover 32 may be

The third connecting portion 321 and the fourth connecting portion 322 are respectively connected to the first connecting portion 312 and the second connecting portion 313 of the first cover 31. At this time, the antenna cover is in a closed state in the cross-sectional direction to achieve alignment The antenna 33 is enclosed and protected. Alternatively, FIG. 8B is the second schematic diagram of the relative relationship between the first cover body and the second cover body in the embodiment of the application. As shown in FIG. 8B, the second cover body 32 may also be composed of two side plates, such as the first side The board 32a and the second side board 32b, the third connecting portion 312 of the first side board 32a and the fourth connecting portion 322 of the second side board 32b are respectively connected to the first connecting portion 312 and the second connecting portion of the first cover 31 313 connection, at this time, the cross-sectional direction of the radome is

In an open state, the antenna 33 is fixed to the inner side walls of the first side plate 32a and the second side plate 32b.

In some possible implementations, since the antenna is arranged in the second cover, the inner side wall of the second cover is provided with fixing parts for fixing the antenna, such as screws, clamping parts, guide rails, etc., so as to facilitate the antenna Installed in the radome.

The radome described in the above embodiment will be described below by taking the first radome having a double-layer structure as an example.

Figure 9 is a schematic structural diagram of the radome in the embodiment of the application. As shown in 9, the radome includes a first panel 311a (the outermost panel) and a second panel 311b (the innermost panel). The first panel 311a and The second panels 311b are fixed together and then connected to the second cover 32. The second panel can be located 40mm directly above the antenna, and the first panel can be located 10mm directly above the second panel. The thickness of the first panel and the second panel are both It can be 3mm, where the first panel is chamfered. At this time, the cross-section of the radome is in a closed state, and the antenna is disposed in the accommodating space between the second panel 311b and the second cover 32.

In the embodiments of the present application, by covering the radiation surface of the antenna with a multilayer panel, seamless coverage of the antenna is achieved, the isolation of the antenna is improved, and the performance of the antenna is improved.

Based on the same inventive concept, an embodiment of the present application provides a base station antenna, which can be applied to the base station in the foregoing embodiment.

FIG. 10 is a schematic structural diagram of a base station antenna in an embodiment of the application. As shown in FIG. 10, the base station antenna includes an antenna 33, including an antenna array and a reflector, and the antenna array includes multiple antenna units of the same frequency band and a feeding network, The antenna array is arranged on the reflector; like the radome 30 in the above embodiment, the antenna 33 is arranged in the radome 30, and the radome 30 protects the antenna 33.

In practical applications, the above-mentioned antennas can be MIMO antennas, Massive MIMO antennas, etc., of course, can also be other forms of antennas. These antennas need to include an antenna array composed of multiple antenna elements, which is not specifically limited in the embodiment of this application. .

For example, taking the radome as a double-layer radome as an example, the above-mentioned antenna can be composed of an 8-column antenna array, and the 8-column antenna array can be fixed on the reflector. Its working frequency band is 1710-2200MHz, and the antenna unit supports + 45. -45 dual-polarization work, each column antenna array can contain several antenna elements, and the reflector can be installed and fixed on the second cover of the double-layer radome. FIG. 11 is a schematic diagram of the comparison of isolation between the antenna units in the double-layer radome in the embodiment of the application and the conventional radome. See FIG. 11, which is compared with the conventional radome shown in FIG. 2 above. The isolation between the antenna elements in the cover is greatly improved, thereby improving the antenna performance.

In the above-mentioned embodiments, the description of each embodiment has its own focus. For a part that is not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

The above are only exemplary specific implementations of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art can easily think of changes or changes within the technical scope disclosed in this application. Replacement shall be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A radome, characterized in that the radome includes: a first cover for transmitting electromagnetic waves radiated by the antenna and a second cover for fixing the antenna; the first cover includes an opposite first cover A connecting portion and a second connecting portion, the second cover body includes a third connecting portion and a fourth connecting portion opposite, the first connecting portion is connected to the third connecting portion, and the second connecting portion is connected to the The fourth connecting portion is connected, and the first cover and the second cover enclose an accommodating space for accommodating an antenna;

Wherein, the first cover further includes a multilayer panel arranged at intervals, the multilayer panel is located between the first connecting portion and the second connecting portion, and the multilayer panel covers the antenna Radiating surface.
The radome according to claim 1, wherein the multilayer panel is made by an integral molding process.
The radome according to claim 1 or 2, wherein the outermost panel in the multi-layer panel comprises a straight first part, and a first end of the first part extends vertically in the first direction. The second part and the third part extending perpendicularly from the second end of the first part toward the first direction, the first end is opposite to the second end; the other panels in the multilayer panel are flat plates .
The radome according to claim 3, wherein the connecting portion between the first part and the second part is chamfered, and the connecting part between the first part and the third part is chamfered.
The radome according to any one of claims 1 to 2, wherein the multi-layer panel is a curved panel, and the first cover body is arc-shaped.
The radome according to any one of claims 1 to 5, wherein the distance between two adjacent layers of panels in the multilayer panel is 0.02 times to 0.25 times the working wavelength.
The radome according to claim 6, wherein the panel thickness of the multilayer panel is 1 mm to 4 mm, and the dielectric constant of the multilayer panel ranges from 2.5 to 5.
The radome according to any one of claims 1 to 7, wherein a reinforcing rib for supporting the multi-layer panel is provided between two adjacent layers of the multi-layer panel.
The radome according to any one of claims 1 to 8, wherein a fixing member for fixing the antenna is provided on the inner side wall of the second cover.
A base station antenna, characterized in that it comprises:

The antenna includes an antenna array and a reflector, the antenna array includes a plurality of antenna units of the same frequency band and a feed network, and the antenna array is arranged on the reflector;

The radome according to any one of claims 1 to 9, wherein the antenna is arranged in the radome.