Antenna system and base station
By designing an antenna system that shares reflection plates and feed networks in the base station, the problem of difficulty in increasing frequency band antennas in the base station in the prior art is solved, and communication performance improvements and cost reductions are achieved.
Patent Information
- Application Number
- CN202510142413.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2019-11-30
- Publication Date
- 2025-06-20
AI Technical Summary
In the prior art, it is difficult to add antennas in other frequency bands after construction of the base station, resulting in limited expansion of the communication frequency band.
An antenna system is designed, which includes two antenna arrays operating in different frequency bands. By sharing a reflector and feeding network, it is convenient to add 5G antenna modules to improve the communication performance of the base station.
It is possible to facilitate the increase of communication frequency bands without large-scale modification of base stations, reduce the cost of base station modification, and improve communication performance.
Smart Images
Figure CN120184591A_ABST
Abstract
Description
[0001] This application is a divisional application. The application number of the original application is 201980102146.8, and the original application date is November 30, 2019. The entire contents of the original application are incorporated into this application by reference. Technical Field
[0002] The present application relates to the field of communication technology, and in particular to an antenna system and a base station. Background Art
[0003] With the development of the communications industry, the requirements for the communication frequency bands of base stations are getting higher and higher, and operators expect base stations to have more communication frequency bands. However, the space resources of the operator's site are limited. Therefore, when setting up a base station, the multi-band antennas of the base station are nested or stacked to increase the working frequency band of the base station. However, in the prior art, when antennas of different frequency bands are placed together in a nested or stacked manner, once the base station is built, it is difficult to add antennas of other frequency bands to the base station. Summary of the invention
[0004] The present application provides an antenna system and a base station, which are used to improve the communication performance of the base station.
[0005] In the first aspect, an antenna system is provided, which includes at least two antenna arrays operating in different frequency bands: a first antenna array and a second antenna array; wherein the first antenna array operates in the first operating frequency band, and the second antenna array operates in the second frequency band, the first antenna of the example is a 5G antenna, and the second antenna is a 2G, 3G, 4G antenna. The antenna system also includes a first reflector, the first antenna array and the second antenna array are stacked on the first reflector, and the first antenna array and the second antenna array share a first reflector. During assembly, the second antenna array can be an existing antenna on the base station in the prior art, and the first antenna array is an additional 5G antenna. The first antenna array and the first reflector form a module, which is placed on the side of the second antenna array away from the radiation area, and the second antenna array and the first antenna array share the first reflector. It can be seen from the above description that the antenna system provided in the embodiment of the present application can add different modules as needed to improve the communication performance of the existing base station, thereby reducing the cost of base station modification.
[0006] In a specific implementation, a second feeding network for feeding the second antenna array is further included, and the second feeding network is arranged between the second antenna array and the first antenna array. By arranging the second feeding network between the first antenna array and the second antenna array, the arrangement of the first antenna array and the first reflector is facilitated.
[0007] In a specific feasible implementation, it further includes a radome; the first antenna array, the second antenna array, and the second feeding network are arranged inside the radome. By providing the radome to protect the first antenna array and the second antenna array, the security of the two antenna arrays is improved.
[0008] In a specific feasible implementation, the radome includes a first radome and a second radome. The first antenna array and the first reflector are arranged in the first radome; the second antenna array and the second feeding network are arranged in the second radome. The first antenna array and the second antenna array are protected by different radomes respectively.
[0009] In a specific feasible implementation, there is one radome, and the first antenna array, the second feeding network, and the second antenna array are arranged inside one radome. The first antenna array and the second antenna array are protected as a whole by one radome.
[0010] In a specific feasible implementation, it further includes a second reflector; the second antenna array includes a first part of the second antenna and a second part of the second antenna; the first part of the second antenna and the first antenna array are stacked and arranged on the first reflector; the second part of the second antenna is arranged on the second reflector. By providing the second reflector to reflect part of the signals of the second antenna array, the number of the second antennas in the second antenna array is increased.
[0011] In a specific feasible implementation, the first reflector and the second reflector are arranged along a second direction, and the second direction is perpendicular to the first direction, where the first direction is the direction in which the first antenna array and the second antenna array are stacked. The number of the second antennas in the second antenna array is increased, and the influence of the second reflector on the radiation effect of the first antenna array is avoided.
[0012] In a specific feasible implementation, it further includes a third antenna array. The first antenna array, the second antenna array, and the third antenna array are antenna arrays operating in different frequency bands; among them, the third antenna array and the second part of the second antenna are stacked and arranged on the second reflector. The communication coverage frequency band of the antenna system is increased.
[0013] In a specific feasible implementation, it further includes a radome. The radome includes a first radome and a second radome; the first antenna array and the first reflector are arranged inside the first radome; the second antenna array, the second feeding network, the third antenna array, and the second reflector are arranged inside the second radome. The first antenna array, the second antenna array, and the third antenna array are protected by the first radome and the second radome respectively.
[0014] In a specific feasible embodiment, it further includes an antenna radome, and the antenna radome includes a first antenna radome and a second antenna radome; the second antenna of the first part, the second feed network, the first antenna array, and the first reflector are arranged in the first antenna radome; the second antenna of the second part, the third antenna array, and the second reflector are arranged in the second antenna radome. The first antenna array, the second antenna array, and the third antenna array are protected by the first antenna radome and the second antenna radome respectively.
[0015] In a specific feasible embodiment, it further includes a phase shifter connected to the second feed network. The phase shifter is arranged in the second antenna radome, and the second antenna of the first part located in the first antenna radome is connected to the phase shifter through a jumper. Signals are sent to the second antenna through the phase shifter, and the second antennas located in different antenna radomes are connected through jumpers.
[0016] In a specific feasible embodiment, it further includes a fourth antenna array; the first antenna array, the second antenna array, the third antenna array, and the fourth antenna array are antenna arrays operating in different frequency bands; the fourth antenna array is stacked with the second antenna array and the third antenna array on the second reflector. The communication coverage frequency band of the antenna system is improved.
[0017] In a second aspect, a base station is provided. The base station includes the antenna system described in any one of the above, and a digital phase shifter connected to the antenna system. Through the antenna system, different modules can be added as needed to improve the communication performance of the existing base station, reducing the cost of base station modification. Description of the Drawings
[0018] Figure 1 It is a structural block diagram of the antenna system provided by the embodiment of the present application;
[0019] Figure 2 It is a structural block diagram of another antenna system provided by the embodiment of the present application;
[0020] Figure 3 It is a structural block diagram of another antenna system provided by the embodiment of the present application;
[0021] Figure 4 It is a structural block diagram of another antenna system provided by the embodiment of the present application;
[0022] Figure 5 It is a structural block diagram of another antenna system provided by the embodiment of the present application;
[0023] Figure 6 It is a structural block diagram of another antenna system provided by the embodiment of the present application;
[0024] Figure 7 The structural block diagram of another antenna system provided by the embodiment of the present application. Detailed implementation manners
[0025] To facilitate the understanding of the antenna system provided by the embodiment of the present application, first, the application scenario of the antenna system provided by the embodiment of the present application will be described. The antenna system provided by the present application example is applied to a base station. The construction of a base station is an important part of the investment of a mobile communication operator. The construction of a base station generally focuses on elements such as coverage area, call quality, investment efficiency, construction difficulty, and maintenance convenience. With the development of mobile communication network services towards dataization and packetization, the development trend of mobile communication base stations is inevitably towards broadband and large-coverage construction. However, once a base station in the prior art is built, it is impossible to add antennas of other antenna frequency bands, or it takes a large amount of cost to improve the base station. For this reason, the embodiment of the present application provides an antenna system for conveniently improving the frequency band of a base station and improving the communication performance of the base station.
[0026] The antenna system provided by the embodiment of the present application includes at least two antenna arrays, and each antenna array contains multiple antennas arranged in an array. The operating frequency bands of any antenna array are different. Exemplarily, if the antenna system includes a first antenna array and a second antenna array, the first antenna array and the second antenna array operate in two different operating frequency bands; if the antenna system includes a first antenna array, a second antenna array, and a third antenna array, the first antenna array, the second antenna array, and the third antenna array are all in different operating frequency bands. The antenna system provided by the embodiment of the present application will be described in detail below with reference to specific drawings. However, it should be understood that the antenna system shown in the drawings is only for conveniently illustrating the specific implementation manners of the antenna system example. The antenna system provided by the embodiment of the present application can set different antenna arrays according to the layout shown in the drawings as needed, not limited to the illustrated setting scheme.
[0027] As Figure 1 shown, Figure 1 An antenna system provided by the embodiment of the present application is exemplified. The antenna system includes a first antenna array 20 and a second antenna array 10. The first antenna array 20 and the second antenna array 10 are antennas operating in different operating frequency bands. Exemplarily, the first antenna array 20 is a 5G antenna, and the second antenna array 10 is a 2G, 3G, or 4G antenna. Or the first antenna array 20 is a 2G, 3G, or 4G antenna, and the second antenna array 10 is a 5G antenna.
[0028] The first antenna array 20 includes a plurality of first antennas 21 arranged in an array. Figure 1Only one column of the first antennas is illustrated, but it should be understood that the number of columns of the first antennas 21 is not limited in the embodiments of the present application, and multiple columns of the first antennas 21 can be selectively set as needed. Exemplarily, the first antennas 21 with different numbers of columns such as two columns, three columns, four columns, etc. When the first antenna array 20 operates, the first antenna array 20 is fed by a first power feeding network (not shown in the figure).
[0029] The second antenna array 10 includes a plurality of second antennas 11 arranged in an array. In Figure 1 only one column of the second antennas 11 is also illustrated, but the number of the second antennas 11 is not specifically limited in the embodiments of the present application, and multiple columns of the second antennas 11 can be set as needed. Exemplarily, the second antennas 11 with different numbers of columns such as two columns, three columns, four columns, etc. are set. When the second antenna array 10 operates, the second antenna array is fed through a second power feeding network 12, and the second power feeding network 12 is connected to a plurality of second antennas.
[0030] Continuing to refer to Figure 1 , the antenna system further includes a first reflector 30, and the first antenna array 20 and the second antenna array 10 are stacked along a first direction on the first reflector 30. In Figure 1 , the direction indicated by the arrow is the first direction, and the first direction is the direction perpendicular to the reflecting surface of the first reflector 30. As shown in Figure 1 , the first antennas 21 of the first antenna array 20 are fixedly arranged on the reflecting surface of the first reflector 30, and the first power feeding network is arranged on the side of the first reflector 30 away from the reflecting surface. The second antennas 11 and the second power feeding network 12 of the second antenna array 10 are arranged at a position away from the first reflector 30. As shown in Figure 1 , the second power feeding network 12 is arranged between the second antenna array 10 and the first antenna array 20.
[0031] Continuing to refer to Figure 1 , from Figure 1 it can be seen that the first antenna array 20 and the first reflector 30 are set as a whole, so it can be regarded as a module, while the second antenna array 10 is separated from the first antenna array 20 and the first reflector 30. Exemplarily, there is an antenna array on an existing base station. When it is necessary to add the first antenna array 20, the reflector of the existing antenna array is removed, and the antennas in the existing antenna array are fixed through a reinforcement structure (such as an antenna cover or a support frame), and then the module composed of the added antenna array and the reflector is added to the side of the existing antenna array away from the first direction, forming as shown in Figure 1The structure shown in ; wherein the first antenna array 20 is an existing antenna array, and the second antenna array 10 is an added antenna array. Alternatively, the added antenna array is directly arranged in front of the existing antenna array (on the side pointed by the first direction), forming a structure as shown in Figure 1 The structure shown; wherein the existing antenna array can be Figure 1 The first antenna array 20 in the embodiment may be the second antenna array 10. With the above method, there is no need to perform large-scale modification on the base station, which facilitates the increase of the base station communication frequency band and improves the communication effect of the base station.
[0032] refer to Figure 2 , Figure 2 Another specific embodiment of the antenna system is shown in FIG. Figure 2 The same reference numerals in Figure 1 The label in . Figure 2 The first antenna array and the second antenna array shown in FIG. Figure 1 The description of the first antenna array and the second antenna array in . Continue to refer to Figure 2 , Figure 2 The antenna system shown in FIG. Figure 1 In addition to the first antenna array and the second antenna array shown in the figure, the first antenna cover 40a and the second antenna cover 50a are also included. The first antenna cover 40a and the second antenna cover 50a are arranged along the first direction, and the second antenna 11 and the second feeding network 12 of the second antenna array are both arranged in the second antenna cover 50a. The first antenna array and the first reflector 30 are arranged in the first antenna cover 40a. Figure 2 The first phase shifter 22 of the first antenna array is also shown. The first phase shifter 22 is disposed in the first antenna cover 40a, and the first phase shifter 22 is connected to the plurality of first antennas 21 through a first feeding network and transmits signals to the first antennas 21. Figure 2 It can be seen that the first antenna array and the first reflector 30 form a module through the first antenna cover 40a. During assembly, the first antenna cover 40a can be directly placed on the side of the second antenna cover 50a away from the first direction.
[0033] like Figure 3 As shown in Figure 3 for Figure 2 A variation of the antenna system shown. Figure 3 The antenna system shown in the figure has a first antenna array and a second antenna array. Figure 2 The first antenna array and the second antenna array in are the same. The difference is Figure 3Only one first antenna cover 40b is provided, and the second antenna array, the second feeding network 12, the first antenna array, and the first reflector 30 are arranged in sequence along the first reverse direction, and are all arranged within the same antenna cover (the first antenna cover 40b). It should be understood that Figure 2 and Figure 3 The exemplary antenna system can be selectively set according to the actual situation. Different antenna arrays can be arranged in different antenna covers or in the same antenna cover, and no specific limitation is made in the embodiments of the present application.
[0034] Such as Figure 4 shown Figure 4 An exemplary specific implementation manner in which the antenna system includes three antenna arrays is illustrated. Figure 4 The same reference numerals in Figure 1 can be referred to Figure 4 The same reference numerals in Figure 4 The antenna system shown includes a first antenna array, a second antenna array, and a third antenna array. As shown in Figure 4 , the first antenna 21 of the first antenna array is arranged on the first reflector 30 and is connected to the first phase shifter 22 through the first feeding network. The first antenna array, the first reflector 30, and the first phase shifter 22 are arranged within the first antenna cover 40c. The multiple second antennas 11 of the second antenna array are divided into two parts, namely the second antennas 11a of the first part and the second antennas 11b of the second part. Among them, the second antennas 11a of the first part include multiple second antennas 11a, and the second antennas 11b of the second part include multiple second antennas 11b. The second antennas 11a of the first part and their corresponding connected second feeding network 12 are arranged in the second antenna cover 50c. Continuing to refer to Figure 4 , the third antenna array includes multiple third antennas 61, and the third antenna array is fed through the third feeding network. The second antennas 11b of the second part and the third antenna array are arranged on the second reflector 70, and the second antennas 11b of the second part, the third antenna array, and the second reflector 70 are arranged in sequence along the first direction. The second antennas 11b of the second part, the third antenna array, and the second reflector 70 are arranged within the third antenna cover 90. In the antenna system shown in Figure 4 , the second phase shifter 13 and the third phase shifter 62 are also shown. The second phase shifter 13 and the third phase shifter 62 are arranged in sequence along the first direction within the third antenna cover 90. The second phase shifter 13 is connected to the second phase shifter 13 through the second feeding network corresponding to the second antennas 11b of the second part, and the second feeding network 12 corresponding to the second antennas 11a of the first part is connected to the second phase shifter 13 through the jumper 100 between the second antenna cover 50c and the third antenna cover 90. The third antenna array is connected to the third phase shifter 62 through the third feeding network.
[0035] Continuing to refer toFigure 4 , the first antenna cover 40c and the second antenna cover 50c are arranged along the first direction, and the first antenna cover 40c and the second antenna cover 50c are arranged along the second direction with the third antenna cover 90. As Figure 4 shown by the arrow in, the second direction is the direction perpendicular to the first direction. In Figure 4 the antenna system shown, the first reflector 30 and the second reflector 70 are also arranged along the second direction, so that the second reflector 70 is spatially misaligned with the first antenna array, that is, the second reflector 70 is located in the non-overlapping area of the plurality of first antennas 21, avoiding the second reflector 70 from blocking the signal radiation of the first antennas 21 and reducing the influence of the arranged second reflector 70 on the first antennas 21.
[0036] The setting method of the antenna cover provided by the embodiment of the present application is not limited to Figure 4 the method shown in. When the first antenna array, the second antenna array and the third antenna array are arranged in the Figure 4 shown manner, the antenna cover shown in Figure 3 can also be applied to Figure 4 to form an antenna system as shown in Figure 5 . Figure 4 In, the first antenna cover 40c and the second antenna cover 50c can be combined into the first antenna cover 40d, and the other antenna cover is the second antenna cover 50d. The first antenna cover 40d and the second antenna cover 50d are arranged along the second direction. The second antenna 11a, the first antenna array and the first reflector 30 of the first part are arranged in the first antenna cover; while the second antenna 11b, the second reflector 70 and the second phase shifter 13 of the second antenna array of the second part are arranged in the second antenna cover.
[0037] As Figure 6 shown, Figure 6 another specific implementation manner in which the antenna system includes three antenna arrays is exemplified. Figure 6 The same reference numerals in can refer to the same reference numerals in Figure 4 . Figure 6 The antenna system shown in includes the first antenna array, the second antenna array and the third antenna array. The structures of the three antenna arrays are the same as those shown in Figure 4 and will not be elaborated here. In Figure 6 the antenna system shown, there are two antenna covers, namely the first antenna cover 40e and the second antenna cover 50e. As Figure 6 shown, the second antenna cover 50e is an L-shaped cover body with a notch at its upper right corner (taking the placement direction of the antenna system in Figure 6 as the reference direction), and the first antenna cover 40e is arranged at the notch position of the second antenna cover 50e. Continue to refer to Figure 6, a plurality of first antennas 21, a first reflector 30, and a first phase shifter 22 are arranged in a first direction within a first antenna cover 40e. The second antenna cover 50e has an L-shaped structure, and the first antenna cover 40e is located at the notch position of the second antenna cover 50e. The first part of the second antenna 11a is located within the second antenna cover 50e and is stacked with the first antenna 21 and the first reflector 30 in the first direction; the second part of the second antenna 11b, the third antenna array, the second reflector 70, the third phase shifter 62, and the second phase shifter 13 are stacked in the first direction within the second antenna cover 50e.
[0038] As Figure 7 shown, Figure 7 another structure of the antenna system is illustrated. Figure 7 The reference numerals in Figure 6 can refer to the same reference numerals in Figure 7 The antenna system shown in Figure 6 differs from the antenna system shown in Figure 7 in that the antenna system shown in Figure 7 adds a fourth antenna array. The first antenna array, the second antenna array, the third antenna array, and the fourth antenna array are antenna arrays operating in different frequency bands. Exemplarily, the operating frequency band of the first antenna array is 5G, the operating frequency band of the second antenna array is 4G, the operating frequency band of the third antenna array is 3G, and the operating frequency band of the fourth antenna array is 2G. Continuing to refer to Figure 6 , the setting manners of the first antenna array, the second antenna array, and the third antenna array are the same as those in
[0039] and will not be elaborated here. When the fourth antenna array is set, it is stacked with the second antenna array and the third antenna array on the second reflector 70. Exemplarily, the fourth antenna array includes a plurality of fourth antennas 81, and the fourth phase shifter 82 feeds the fourth antenna array through a fourth feeding network. When setting the fourth antenna array, the fourth antenna array and the third antenna array are on the same side of the second reflector 70, and the fourth antenna array is fixedly arranged on the second reflector 70, with the fourth phase shifter 82 and the fourth antenna 81 on both sides of the second reflector 70. Figures 4 to 7 It should be understood that Figure 6The second antenna array and the third antenna array shown in [description] are arranged within one radome, and the first antenna array is arranged within another radome. It is also possible to arrange the second antenna array alone within one radome, while the first antenna array and the third antenna array are arranged within one radome. There are also other different arrangements, such as arranging the first antenna array and the second antenna array within one radome, and the third antenna array alone within one radome. The first antenna array, the second antenna array, and the third antenna array can be arranged arbitrarily according to requirements, and the corresponding radomes can also be assembled accordingly according to the arrangement methods of the first antenna array, the second antenna array, and the third antenna array.
[0040] The embodiment of the present application also provides a base station, which includes the antenna system of any one of the above, and a digital phase shifter connected to the antenna system. As can be seen from the above antenna system, the base station provided by the embodiment of the present application can add different modules to the antenna system according to requirements, thereby improving the communication performance of the existing base station and reducing the cost of base station modification.
[0041] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications.
Claims
1. An antenna system, characterized in that, It includes a second antenna array, a second feed network, and a second antenna cover; The second feed network feeds the second antenna array, and the second antenna array and the second feed network are disposed in the second antenna cover, and there is no reflector in the second antenna cover.
2. The antenna system according to claim 1, characterized in that, It further includes a first antenna array and a first reflector; Wherein, the first antenna array and the second antenna array share the first reflector; the first reflector, the first antenna array and the second antenna array are stacked along a first direction, and the first direction is a direction perpendicular to the reflecting surface of the first reflector.
3. The antenna system according to claim 2, characterized in that, And the second feed network is disposed between the second antenna array and the first antenna array.
4. The antenna system according to claim 2 or 3, characterized in that, The antenna system further includes a first feed network, the first feed network feeds the first antenna array, and the first feed network is disposed on a side of the first reflector away from the reflecting surface.
5. The antenna system according to claim 4, characterized in that, It further includes a first antenna cover, wherein the first antenna array, the first feed network and the first reflector are disposed in the first antenna cover.
6. An antenna system, characterized in that, It includes a second antenna array, a third antenna array, a second feed network, a third feed network, a second reflector, a second antenna cover and a third antenna cover; The second antenna array includes a first part of the second antenna and a second part of the second antenna; The second feed network includes a second feed network corresponding to the first part of the second antenna and a second feed network corresponding to the second part of the second antenna; The first part of the second antenna and its corresponding connected second feed network are disposed in the second antenna cover; The second part of the second antenna and its corresponding connected second feed network, the third antenna array, the third feed network and the second reflector are disposed in the third antenna cover.
7. The antenna system according to claim 6, characterized in that, It further includes a second phase shifter.
8. The antenna system according to claim 6 or 7, characterized in that, It further includes a third phase shifter.
9. The antenna system according to claim 8, characterized in that, The second phase shifter and the third phase shifter are arranged along the first direction and disposed in the third antenna cover.
10. The antenna system according to claim 7, characterized in that, The second feed network corresponding to the first part of the second antenna is connected to the second phase shifter through a jumper between the second antenna cover and the third antenna cover; the second feed network corresponding to the second part of the second antenna is connected to the second phase shifter.
11. The antenna system according to claim 6 or 7, characterized in that, The third antenna array is connected to the third phase shifter through the third feed network.
12. The antenna system according to claim 6, characterized in that, It further includes a first antenna array and a first reflector; Wherein, the first antenna array and the first part of the second antenna share the first reflector; the first reflector, the first antenna array and the first part of the second antenna are stacked along the first direction, and the first direction is a direction perpendicular to the reflecting surface of the first reflector.
13. The antenna system according to claim 12, characterized in that, And the second feed network corresponding to the first part of the second antenna is disposed between the first part of the second antenna and the first antenna array.
14. The antenna system according to claim 12 or 13, characterized in that, The antenna system further includes a first feed network, the first feed network feeds the first antenna array, and the first feed network is disposed on a side of the first reflector away from the reflecting surface.
15. The antenna system according to claim 14, characterized in that, It also includes a first radome, wherein the first antenna array, the first feeding network and the first reflector are arranged in the first radome.
16. The antenna system according to any one of claims 6 - 15, characterized in that, There is no reflector in the second radome.
17. The antenna system according to claim 14, characterized in that, The first antenna array, the first feeding network and the first reflector are arranged in the second antenna cover.
18. The antenna system according to claim 15 or 16, characterized in that The first radome and the second radome are arranged along a second direction with the third radome.
19. An antenna system, characterized in that It includes a second antenna array, a third antenna array, a second feeding network, a third feeding network, a second reflecting plate and a second antenna cover; The second antenna array includes a second antenna of the first part and a second antenna of the second part; The second feeding network includes a second feeding network connected to the second antenna of the first part, and a second feeding network corresponding to the second antenna of the second part; The second antenna cover is an L-shaped cover The second antenna of the first part and the correspondingly connected second feeding network are arranged in the upper part of the L-shape of the second antenna cover; The second antenna of the second part, the second feeding network corresponding to the second antenna of the second part, the third antenna array, the third feeding network and the second reflecting plate are arranged at the L-shaped lower part of the second antenna cover.
20. The antenna system according to claim 19, characterized in that A second phase shifter is also included.
21. The antenna system according to claim 19 or 20, characterized in that A third phase shifter is also included.
22. The antenna system according to claim 21, characterized in that The second phase shifter and the third phase shifter are arranged in a first direction in the second antenna cover.
23. The antenna system according to claim 20, characterized in that The second feeding network corresponding to the second antenna of the first part is connected to the second phase shifter, and the second feeding network corresponding to the second antenna of the second part is connected to the second phase shifter.
24. The antenna system according to claim 21 or 22, characterized in that The third antenna array is connected to the third phase shifter through a third feeding network.
25. The antenna system according to claim 19, characterized in that Also includes a first antenna array and a first reflector; Among them, the first antenna array and the second antenna of the first part share the first reflector; the first reflector, the first antenna array and the second antenna of the first part are stacked along a first direction, and the first direction is a direction perpendicular to the reflecting surface of the first reflector.
26. The antenna system according to claim 25, characterized in that The second feeding network corresponding to the second antenna of the first part is arranged between the second antenna of the first part and the first antenna array.
27. The antenna system according to claim 25 or 26, characterized in that The antenna system further includes a first feeding network, which feeds the first antenna array. The first feeding network is arranged on a side of the first reflector away from the reflective surface.
28. The antenna system according to claim 27, characterized in that It also includes a first radome, wherein the first antenna array, the first feeding network and the first reflector are arranged in the first radome.
29. The antenna system according to claim 28, characterized in that The first radome is located at a notch position of the L-shaped structure of the second radome.
30. An antenna system, characterized in that include: A first antenna array, a second antenna array and a first reflector; wherein the first antenna array and the second antenna array are antenna arrays operating in different frequency bands; The first antenna array and the second antenna array are stacked on a first reflector; and the first antenna array and the second antenna array share the first reflector.
31. A base station, characterized in that Comprising the antenna system as claimed in any one of claims 1 to 30.