Base station antenna and communication equipment

Abstract

The utility model discloses a base station antenna and communication equipment. The base station antenna comprises a substrate; the first radiating body and the second radiating body are arranged on the substrate in a spaced mode in the first direction, the first radiating body is provided with a first polarization direction, the second radiating body is provided with a second polarization direction, and the first polarization direction and the second polarization direction are arranged in a mutually orthogonal mode; the first radiator comprises a first branch and a second branch, the second branch is connected with the first branch, the second branch is arranged close to the second radiator, and the size of the second branch is used for adjusting the isolation degree between the first radiator and the second radiator. Through the mode, the isolation degree between the first radiator and the second radiator can be improved, mutual interference between the first radiator and the second radiator is reduced, and the space of the base station antenna is saved.

Description

Technical Field

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

[0002] As the core equipment of a communication network, a base station is used to connect users' electronic devices to the core network. Therefore, base stations need to support multiple wireless communication protocols, such as WiFi, LTE Sub 1G, and Zigbee, to meet the communication needs of different scenarios.

[0003] Different wireless communication protocols have significant differences in frequency bands and signal characteristics, which can easily lead to mutual interference and affect communication quality. Furthermore, existing base station antennas have low isolation, making them prone to mutual interference; additionally, space limitations prevent the installation of multiple base station antennas within a single base station. Utility Model Content

[0004] The main technical problem addressed by this application is to provide a base station antenna and communication equipment that can solve the problem of low isolation.

[0005] This application provides a base station antenna for use in communication equipment, the base station antenna comprising:

[0006] substrate;

[0007] A first radiator and a second radiator are disposed at a distance from each other on the substrate along a first direction. The first radiator has a first polarization direction and the second radiator has a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other.

[0008] The first radiator includes a first branch and a second branch, the second branch being connected to the first branch and positioned close to the second radiator. The size of the second branch is used to adjust the isolation between the first radiator and the second radiator.

[0009] The second branch is rectangular in shape, with a length between 9mm and 30mm and a width between 1.8mm and 6mm.

[0010] The first radiator is provided with a first hollow area and a second hollow area, which are used to divide the first radiator into a first branch and a second branch. The first radiator also includes a first feed point, which is located between the first hollow area and the second hollow area and is connected to the first branch and the second branch respectively.

[0011] The second radiator includes a third branch, a fourth branch, and a fifth branch. The third branch and the fourth branch are spaced apart along a second direction. The third branch is connected to the fourth branch, and the fourth branch and the fifth branch are spaced apart along a first direction. The second direction is perpendicular to the first direction.

[0012] The fourth branch and the fifth branch are symmetrically arranged, and the side of the fourth branch away from the third branch is arranged in a stepped shape.

[0013] The third branch has a groove on the side near the fifth branch, one end of the fifth branch is disposed in the groove, and the fifth branch is spaced apart from the bottom wall of the groove.

[0014] The second radiator further includes a second feed point, which is located within the groove and is connected to the third branch and the fifth branch, respectively.

[0015] This application also provides a base station antenna for use in communication equipment, the base station antenna comprising:

[0016] substrate;

[0017] A first radiator and a second radiator are disposed at a distance from each other on the substrate along a first direction. The first radiator has a first polarization direction and the second radiator has a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other.

[0018] The first radiator includes a first branch, a second branch, and a first feed point. The second branch is connected to the first branch and is located close to the second radiator. The first feed point is connected to both the first branch and the second branch.

[0019] The second radiator includes a third branch, a fourth branch, a fifth branch, and a second feed point. The third branch is connected to the fourth branch, and the second feed point is connected to both the third branch and the fifth branch.

[0020] The first radiator is provided with a first hollow area and a second hollow area. The first hollow area and the second hollow area are used to divide the first radiator into the first branch and the second branch. The first feed point is located between the first hollow area and the second hollow area.

[0021] The third branch and the fourth branch are spaced apart along the second direction, and the fourth branch and the fifth branch are spaced apart along the first direction. The second direction is perpendicular to the first direction. The fourth branch and the fifth branch are symmetrically arranged, and the side of the fourth branch away from the third branch is arranged in a stepped shape.

[0022] The second branch is rectangular in shape, with a length between 9mm and 30mm and a width between 1.8mm and 6mm.

[0023] This application also provides a communication device, including the above-described base station antenna, a first radio frequency circuit, and a second radio frequency circuit, wherein the first radio frequency circuit is connected to a first feed point of the first radiator, and the second radio frequency circuit is connected to a second feed point of the second radiator.

[0024] The beneficial effects of this application are as follows: The base station antenna of this application includes a substrate, a first radiator, and a second radiator. The first and second radiators are spaced apart on the substrate along a first direction. The first radiator has a first polarization direction, and the second radiator has a second polarization direction. The first and second polarization directions are orthogonal to each other. The first radiator includes a first branch and a second branch, with the second branch connected to the first branch and positioned close to the second radiator. The size of the second branch is used to adjust the isolation between the first and second radiators. By orthogonally aligning the first and second polarization directions, the isolation between the first and second radiators can be improved, reducing mutual interference between them. Furthermore, by placing the first and second radiators on the substrate, two antennas can be stacked on the substrate, saving space for the base station antenna. Moreover, by adjusting the size of the second branch, the isolation between the first and second radiators can be adjusted, further improving the isolation between them. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0026] Figure 1 This is a schematic diagram of the structure of one embodiment of the base station antenna provided in this application;

[0027] Figure 2 yes Figure 1 A schematic diagram of the structure of one embodiment of the first radiator;

[0028] Figure 3 yes Figure 1 A schematic diagram of the structure of one embodiment of the second radiator;

[0029] Figure 4 yes Figure 1 A simulation diagram illustrating impedance matching in an embodiment of the first and second radiators in a base station antenna.

[0030] Figure 5 yes Figure 1 A simulation diagram illustrating the isolation of an embodiment of the first and second radiators in a base station antenna. Detailed Implementation

[0031] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0033] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0036] In the description of the embodiments of this application, the technical 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" indicate the orientation or positional relationship based on the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" 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 connection between two components or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0038] As the core equipment of a communication network, a base station is used to connect users' electronic devices to the core network. Therefore, base stations need to support multiple wireless communication protocols, such as WiFi, LTE Sub 1G, and Zigbee, to meet the communication needs of different scenarios.

[0039] Different wireless communication protocols have significant differences in frequency bands and signal characteristics, which can easily lead to mutual interference and affect communication quality. Furthermore, existing base station antennas have low isolation, making them prone to mutual interference; additionally, space limitations prevent the installation of multiple base station antennas within a single base station.

[0040] Existing base stations include two dipole antennas. Mutual interference between the two dipole antennas can be reduced by increasing the physical distance between them or by using an isolation barrier between them. However, increasing the physical distance results in excessively large antenna space, making it unsuitable for compact base stations. Using an isolation barrier affects the radiation patterns of the two dipole antennas, preventing them from achieving omnidirectional radiation.

[0041] Please see Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the structure of one embodiment of the base station antenna provided in this application; Figure 2 yes Figure 1 A schematic diagram of the structure of one embodiment of the first radiator; Figure 3 yes Figure 1 A schematic diagram of the structure of an embodiment of the second radiator. The base station antenna 100 of this embodiment includes a substrate 10, a first radiator 20, and a second radiator 30. The substrate 10 includes, but is not limited to, a dielectric substrate.

[0042] A first radiator 20 and a second radiator 30 are disposed at a distance from each other on a substrate 10 along a first direction X. The first direction X can be the length direction of the substrate 10 to increase the distance between the first radiator 20 and the second radiator 30. Compared with two dipole antennas in the prior art, this eliminates the need to increase the physical distance between the first radiator 20 and the second radiator 30, thus reducing the volume of the base station antenna 100. Furthermore, no isolation barrier is needed between the first radiator 20 and the second radiator 30, reducing the radiation modes of the first radiator 20 and the second radiator 30, thereby achieving omnidirectional radiation. In other embodiments, the first direction X can be the width direction of the substrate 10, which will not be elaborated further here.

[0043] The first radiator 20 has a first polarization direction, and the second radiator 30 has a second polarization direction. For example, the first polarization direction can be a horizontal polarization direction, while the second polarization direction can be a vertical polarization direction. In this design, the base station antenna 100 can be used to receive or transmit signals with various polarization directions.

[0044] The first radiator 20 includes a first branch 22 and a second branch 23. The second branch 23 is connected to the first branch 22 and is located close to the second radiator 30. The size of the second branch 23 is used to adjust the isolation between the first radiator 20 and the second radiator 30.

[0045] In some embodiments, the first radiator 20 is perforated to form at least one perforated region 21. The perforated region 21 is disposed between the first branch 22 and the second branch 23, and is located close to the second radiator 30. The size of the second branch 23 is used to adjust the isolation between the first radiator 20 and the second radiator 30.

[0046] The base station antenna 100 of this embodiment includes a substrate 10, a first radiator 20, and a second radiator 30. The first radiator 20 and the second radiator 30 are spaced apart on the substrate 10 along a first direction X. The first radiator 20 has a first polarization direction, and the second radiator 30 has a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other. The first radiator 20 includes a first branch 22 and a second branch 23. The second branch 23 is connected to the first branch 22 and is disposed close to the second radiator 30. The size of the second branch 23 is used to adjust the isolation between the first radiator 20 and the second radiator 30. By orthogonally arranging the first polarization direction and the second polarization direction, the isolation between the first radiator 20 and the second radiator 30 can be improved, and mutual interference between the first radiator 20 and the second radiator 30 can be reduced. In addition, by setting the first radiator 20 and the second radiator 30 on the substrate 10, two antennas can be stacked on the substrate 10, saving space in the base station antenna 100. Furthermore, by adjusting the size of the second branch 23, the isolation between the first radiator 20 and the second radiator 30 can be adjusted, further improving the isolation between the first radiator 20 and the second radiator 30, reducing interference between the first radiator 20 and the second radiator 30, and improving the signal-to-noise ratio and data transmission rate of the base station antenna 100. By setting the first polarization direction and the second polarization direction orthogonally to each other, the directivity of the first radiator 20 and the second radiator 30 is mutually oriented at a notch.

[0047] According to some embodiments of this application, such as Figure 1 and Figure 2 As shown, the second branch 23 in this embodiment is rectangular in shape, with a length L1 between 9mm and 30mm and a width D1 between 1.8mm and 6mm. The dimensions of the second branch 23 include its length L1 and its width D1.

[0048] In some embodiments, the length L1 of the second branch 23 includes, but is not limited to, 9mm, 10mm, 15mm, 19mm, 20mm, 25mm, 29mm, or 30mm; the width D1 of the second branch 23 includes, but is not limited to, 1.8mm, 2mm, 3mm, 3.7mm, 4mm, 5mm, or 6mm. For example, if the length L1 of the second branch 23 is 9mm and the width D1 of the second branch 23 is 1.8mm, the length L1 and the width D1 of the second branch 23 can be adjusted proportionally to adjust the isolation between the first radiator 20 and the second radiator 30, thereby further improving the isolation between the first radiator 20 and the second radiator 30.

[0049] According to some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first branch 22 in this embodiment has a rectangular region, in which the length L2 of the first branch 22 is between 16mm and 49mm, and the width D2 of the first branch 22 is between 1.8mm and 7mm.

[0050] In some embodiments, the length L2 of the first branch 22 includes, but is not limited to, 16mm, 20mm, 25mm, 30mm, 32mm, 35mm, 40mm, 45mm, or 49mm; the width D2 of the first branch 22 includes, but is not limited to, 1.8mm, 2mm, 3mm, 3.5mm, 4mm, 5mm, 6mm, or 7mm. For example, the length L2 of the first branch 22 is 32mm, and the width D2 of the first branch 22 is 3.5mm. The length L2 and the width D2 of the first branch 22 can be adjusted proportionally to improve the isolation between the first radiator 20 and the second radiator 30, reduce signal interference between the first radiator 20 and the second radiator 30, and improve communication quality.

[0051] According to some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first radiator 20 is provided with a first hollow area 211 and a second hollow area 212. The first hollow area 211 and the second hollow area 212 are used to divide the first radiator 20 into a first branch 22 and a second branch 23, and the first hollow area 211 and the second hollow area 212 are located close to the second radiator 30.

[0052] The first radiator 20 also includes a first feed point 24, which is located between the first hollow area 211 and the second hollow area 212, and is connected to the first branch 22 and the second branch 23 respectively.

[0053] The first hollowed-out area 211 is shaped like an inverted L, and the second hollowed-out area 212 is shaped like a step. In other embodiments, the shapes of the first hollowed-out area 211 and the second hollowed-out area 212 can be other shapes, which will not be described in detail here.

[0054] In this embodiment, the first radiator 20 is provided with a first hollow region 211 and a second hollow region 212, the second hollow region 212 being stepped in shape. This arrangement ensures that the characteristic impedance of the first radiator 20 remains relatively constant with frequency variation, thereby achieving ultra-wideband impedance matching characteristics. Furthermore, the current direction of the first radiator 20 and the current direction of the second radiator 30 are in the same direction, thus achieving omnidirectional radiation characteristics of the base station antenna 100 and improving the stability of the base station antenna 100 at different frequencies.

[0055] According to some embodiments of this application, such as Figures 1 to 3 As shown, the second radiator 30 in this embodiment includes a third branch 31, a fourth branch 32, and a fifth branch 33.

[0056] The third branch 31 and the fourth branch 32 are spaced apart along the second direction Y, the third branch 31 is connected to the fourth branch 32, and the fourth branch 32 and the fifth branch 33 are spaced apart along the first direction X, with the second direction Y and the first direction X being perpendicular to each other.

[0057] In some implementations, the fourth branch 32 includes a first sub-branch 321 and a second sub-branch 322, with the first sub-branch 321 connected to the third branch 31 via the second sub-branch 322. The first sub-branch 321 extends along a first direction X, and the second sub-branch 322 extends along a second direction Y. For example, the first sub-branch 321 and the second sub-branch 322 are arranged perpendicularly.

[0058] The fifth branch 33 includes a third sub-branch 331 and a fourth sub-branch 332. The third sub-branch 331 is connected to the fourth sub-branch 332. The third sub-branch 331 extends along a first direction X, and the fourth sub-branch 332 extends along a second direction Y. For example, the third sub-branch 331 and the fourth sub-branch 332 are arranged perpendicularly.

[0059] In some implementations, the fourth branch 32 and the fifth branch 33 are symmetrically arranged, that is, the third sub-branch 331 and the fourth sub-branch 332 are symmetrically arranged with the first sub-branch 321 and the second sub-branch 322 respectively, so that the shape of the fourth branch 32 and the fifth branch 33 is symmetrical wing-shaped.

[0060] In some embodiments, the fourth branch 32 is stepped on the side away from the third branch 31. The first sub-branch 321 is also stepped on the side away from the third branch 31. The fifth branch 33 is stepped on the side away from the third branch 31, meaning the third sub-branch 331 is stepped on the side away from the third branch 31.

[0061] The second radiator 30 in this embodiment includes a third branch 31, a fourth branch 32, and a fifth branch 33. The third branch 31 and the fourth branch 32 are spaced apart along the second direction Y, and the third branch 31 is connected to the fourth branch 32. The fourth branch 32 and the fifth branch 33 are spaced apart along the first direction X, and are symmetrically arranged. The side of the fourth branch 32 away from the third branch 31 is arranged in a stepped shape. Through this method, the characteristic impedance of the second radiator 30 remains relatively flat as the frequency changes, thereby achieving the ultra-wideband impedance matching characteristics of the second radiator 30.

[0062] According to some embodiments of this application, such as Figures 1 to 3As shown, in this embodiment, a groove 311 is provided on the side of the third branch 31 near the fifth branch 33, one end of the fifth branch 33 is provided in the groove 311, and the fifth branch 33 is spaced apart from the bottom wall of the groove 311.

[0063] Among them, the third branch 31 is provided with a groove 311 on the side near the fifth branch 33, and one end of the fourth sub-branch 332 is provided in the groove 311, and the fourth sub-branch 332 is spaced apart from the bottom wall of the groove 311.

[0064] In some embodiments, the second radiator 30 further includes a second feed point 34, which is located in the groove 311 and is connected to the third branch 31 and the fifth branch 33, respectively.

[0065] The second feed point 34 is located within the groove 311. One side of the second feed point 34 is connected to the side wall of the groove 311 to connect with the third branch 31. The other side of the second feed point 34 is connected to the fourth sub-branch 332 to connect with the fifth branch 33.

[0066] In this embodiment, a groove 311 is provided on the side of the third branch 31 near the fifth branch 33, and one end of the fifth branch 33 is disposed in the groove 311, with the fifth branch 33 and the bottom wall of the groove 311 spaced apart. This method ensures that the characteristic impedance of the second radiator 30 remains relatively flat as the frequency changes, thereby achieving the ultra-wideband impedance matching characteristics of the second radiator 30.

[0067] According to some embodiments of this application, such as Figure 1 and Figure 3 As shown, the third branch 31 in this embodiment is rectangular in shape, with a length L3 between 13mm and 39mm and a width D3 between 1.8mm and 6mm.

[0068] In some embodiments, the length L3 of the third branch 31 is, but not limited to, 13mm, 15mm, 20mm, 25mm, 26mm, 30mm, 35mm, or 39mm; the width D3 of the third branch 31 is, but not limited to, 1.8mm, 2mm, 3mm, 3.5mm, 4mm, 5mm, or 6mm. For example, the length L3 of the third branch 31 is 26mm, and the width D3 of the third branch 31 is 3.5mm. The length L3 and the width D3 of the third branch 31 can be adjusted proportionally to improve the isolation between the first radiator 20 and the second radiator 30, reduce signal interference between the first radiator 20 and the second radiator 30, and improve communication quality.

[0069] This application also provides a base station antenna 100, such as Figures 1-3As shown. The base station antenna 100 in this embodiment includes a substrate 10, a first radiator 20, and a second radiator 30.

[0070] A first radiator 20 and a second radiator 30 are disposed at a distance from each other on a substrate 10 along a first direction X. The first direction X can be the length direction of the substrate 10 to increase the distance between the first radiator 20 and the second radiator 30. Compared with two dipole antennas in the prior art, this eliminates the need to increase the physical distance between the first radiator 20 and the second radiator 30, thus reducing the volume of the base station antenna 100. Furthermore, no isolation barrier is needed between the first radiator 20 and the second radiator 30, reducing the radiation modes of the first radiator 20 and the second radiator 30, thereby achieving omnidirectional radiation. In other embodiments, the first direction X can be the width direction of the substrate 10, which will not be elaborated further here.

[0071] The first radiator 20 has a first polarization direction, and the second radiator 30 has a second polarization direction. For example, the first polarization direction can be a horizontal polarization direction, while the second polarization direction can be a vertical polarization direction. In this design, the base station antenna 100 can be used to receive or transmit signals with various polarization directions.

[0072] The first radiator 20 includes a first branch 22, a second branch 23 and a first feed point 24. The second branch 23 is connected to the first branch 22 and is located close to the second radiator 30. The first feed point 24 is connected to the first branch 22 and the second branch 23 respectively.

[0073] The second radiator 30 includes a third branch 31, a fourth branch 32, a fifth branch 33, and a second feed point 34. The third branch 31 is connected to the fourth branch 32, and the second feed point 34 is connected to the third branch 31 and the fifth branch 33, respectively.

[0074] The base station antenna 100 of this embodiment includes a substrate 10, a first radiator 20, and a second radiator 30. The first radiator 20 and the second radiator 30 are spaced apart on the substrate 10 along a first direction X. The first radiator 20 has a first polarization direction, and the second radiator 30 has a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other. By orthogonally arranging the first polarization direction and the second polarization direction, the isolation between the first radiator 20 and the second radiator 30 can be improved, and mutual interference between the first radiator 20 and the second radiator 30 can be reduced. In addition, by setting the first radiator 20 and the second radiator 30 on the substrate 10, two antennas can be stacked on the substrate 10, saving space in the base station antenna 100. Furthermore, by setting a first feed point 24 on the first radiator 20 and a second feed point 34 on the second radiator 30, a dual-feed MIMO (Multiple Input Multiple Output) antenna with two feed points can be implemented on the same substrate 10, improving the overall performance and reliability of the base station antenna 100.

[0075] According to some embodiments of this application, such as Figures 1 to 3 As shown, in this embodiment, the first radiator 20 is provided with a first hollowed-out region 211 and a second hollowed-out region 212. The first hollowed-out region 211 and the second hollowed-out region 212 are used to divide the first radiator 20 into a first branch 22 and a second branch 23, and the first hollowed-out region 211 and the second hollowed-out region 212 are disposed close to the second radiator 30. The first feed point 24 is located between the first hollowed-out region 211 and the second hollowed-out region 212.

[0076] The third branch 31 and the fourth branch 32 are spaced apart along the second direction Y, and the fourth branch 32 and the fifth branch 33 are spaced apart along the first direction X.

[0077] In some implementations, the fourth branch 32 includes a first sub-branch 321 and a second sub-branch 322, with the first sub-branch 321 connected to the third branch 31 via the second sub-branch 322. The first sub-branch 321 extends along a first direction X, and the second sub-branch 322 extends along a second direction Y. For example, the first sub-branch 321 and the second sub-branch 322 are perpendicular to each other. The fifth branch 33 includes a third sub-branch 331 and a fourth sub-branch 332, with the third sub-branch 331 connected to the fourth sub-branch 332. The third sub-branch 331 extends along a first direction X, and the fourth sub-branch 332 extends along a second direction Y. For example, the third sub-branch 331 and the fourth sub-branch 332 are perpendicular to each other.

[0078] In some implementations, the fourth branch 32 and the fifth branch 33 are symmetrically arranged, that is, the third sub-branch 331 and the fourth sub-branch 332 are symmetrically arranged with the first sub-branch 321 and the second sub-branch 322 respectively, so that the shape of the fourth branch 32 and the fifth branch 33 is symmetrical wing-shaped.

[0079] In some embodiments, the fourth branch 32 is stepped on the side away from the third branch 31. The first sub-branch 321 is also stepped on the side away from the third branch 31. The fifth branch 33 is stepped on the side away from the third branch 31, meaning the third sub-branch 331 is stepped on the side away from the third branch 31. This arrangement ensures that the characteristic impedance of the second radiator 30 remains relatively flat as frequency changes, thereby achieving ultra-wideband impedance matching characteristics of the second radiator 30.

[0080] Please see Figures 4 to 5 As shown, Figure 4 yes Figure 1 A simulation diagram illustrating impedance matching in an embodiment of the first and second radiators in a base station antenna. Figure 5 yes Figure 1 A simulation diagram illustrating the isolation of an embodiment of the first and second radiators in a base station antenna.

[0081] exist Figure 4 In the diagram, the horizontal axis represents frequency in Hz; the vertical axis represents the impedance matching of the first radiator 20 and the impedance matching of the second radiator 30 in dB. For example... Figure 4 In the above embodiment, m1 and m2 represent the frequency of the second radiator 30 as 2.4071 GHz and its impedance matching as -10.5585 dB; m2 represents the frequency of the second radiator 30 as 2.5664 GHz and its impedance matching as -9.9873 dB. Therefore, it can be seen that the second radiator 30 in the above embodiment has ultra-wideband impedance matching characteristics, and the first radiator 20 also has ultra-wideband impedance matching characteristics.

[0082] exist Figure 5 In the graph, the horizontal axis represents frequency in Hz; the vertical axis represents the impedance matching of the first radiator 20 and the isolation of the second radiator 30 in dB. Figure 5 It can be concluded that the isolation between the first radiator 20 and the second radiator 30 in the above embodiment is greater than 25dB, thus improving the isolation between the first radiator 20 and the second radiator 30 and reducing mutual interference between the first radiator 20 and the second radiator 30.

[0083] This application also provides a communication device, including the base station antenna 100, a first radio frequency circuit, and a second radio frequency circuit as described in the above embodiments. The first radio frequency circuit is connected to a first feed point 24 of a first radiator 20, and the second radio frequency circuit is connected to a second feed point 34 of a second radiator 30. The communication device includes, but is not limited to, a base station.

[0084] In summary, the base station antenna 100 of this application includes a substrate 10, a first radiator 20, and a second radiator 30. The first radiator 20 and the second radiator 30 are spaced apart on the substrate 10 along a first direction X. The first radiator 20 has a first polarization direction, and the second radiator 30 has a second polarization direction. The first polarization direction and the second polarization direction are orthogonal to each other. The first radiator 20 has at least one hollow area 21 and includes a first branch 22 and a second branch 23. The second branch 23 is connected to the first branch 22 and is disposed close to the second radiator 30. The size of the second branch 23 is used to adjust the isolation between the first radiator 20 and the second radiator 30. By orthogonally arranging the first polarization direction and the second polarization direction, the isolation between the first radiator 20 and the second radiator 30 can be improved, and mutual interference between the first radiator 20 and the second radiator 30 can be reduced. In addition, by setting the first radiator 20 and the second radiator 30 on the substrate 10, two antennas can be stacked on the substrate 10, saving space in the base station antenna 100. Furthermore, by adjusting the size of the second branch 23, the isolation between the first radiator 20 and the second radiator 30 can be adjusted, further improving the isolation between the first radiator 20 and the second radiator 30, reducing interference between the first radiator 20 and the second radiator 30, and improving the signal-to-noise ratio and data transmission rate of the base station antenna 100. By setting the first polarization direction and the second polarization direction orthogonally to each other, the directivity of the first radiator 20 and the second radiator 30 is mutually oriented at a notch.

[0085] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A base station antenna, characterized by, The base station antenna is applied to a communication device and comprises: a substrate; a first radiator and a second radiator are arranged on the substrate in a first direction, the first radiator has a first polarization direction, and the second radiator has a second polarization direction, the first polarization direction and the second polarization direction are arranged orthogonally to each other; the first radiator comprises a first branch and a second branch, the second branch is connected with the first branch, the second branch is arranged close to the second radiator, and the size of the second branch is used to adjust the isolation between the first radiator and the second radiator.

2. The base station antenna of Claim 1, wherein, The second branch is rectangular in shape, the length of the second branch is 9-30 mm, and the width of the second branch is 1.8-6 mm.

3. The base station antenna of Claim 1, wherein, The first radiator is provided with a first hollow area and a second hollow area, the first hollow area and the second hollow area are used to divide the first radiator into the first branch and the second branch; the first radiator further comprises a first feeding point, the first feeding point is located between the first hollow area and the second hollow area, and is connected with the first branch and the second branch respectively.

4. The base station antenna of any of Claims 1-3, wherein, The second radiator comprises a third branch, a fourth branch and a fifth branch, the third branch and the fourth branch are arranged in a second direction, the third branch is connected with the fourth branch, and the fourth branch and the fifth branch are arranged in the first direction, the second direction is perpendicular to the first direction.

5. The base station antenna of Claim 4, wherein, The fourth branch and the fifth branch are arranged symmetrically, and the side of the fourth branch away from the third branch is arranged in a stepped manner.

6. The base station antenna of Claim 4, wherein, The third branch is provided with a groove on the side close to the fifth branch, one end of the fifth branch is arranged in the groove, and the fifth branch is arranged away from the bottom wall of the groove.

7. The base station antenna of Claim 6, wherein, The second radiator further comprises a second feeding point, the second feeding point is located in the groove, and is connected with the third branch and the fifth branch respectively.

8. A base station antenna, comprising: The base station antenna is applied to a communication device and comprises: a substrate; a first radiator and a second radiator are arranged on the substrate in a first direction, the first radiator has a first polarization direction, and the second radiator has a second polarization direction, the first polarization direction and the second polarization direction are arranged orthogonally to each other; the first radiator comprises a first branch, a second branch and a first feeding point, the second branch is connected with the first branch, the second branch is arranged close to the second radiator, and the first feeding point is connected with the first branch and the second branch respectively; the second radiator comprises a third branch, a fourth branch, a fifth branch and a second feeding point, the third branch is connected with the fourth branch, and the second feeding point is connected with the third branch and the fifth branch respectively.

9. The base station antenna of Claim 8, wherein, The first radiator is provided with a first hollow area and a second hollow area for dividing the first radiator into the first branch and the second branch, and the first feeding point is located between the first hollow area and the second hollow area.

10. The base station antenna of claim 8 or 9, wherein, The third branch and the fourth branch are arranged in a second direction, the fourth branch and the fifth branch are arranged in the first direction, the second direction is perpendicular to the first direction, the fourth branch and the fifth branch are symmetrically arranged, and the fourth branch is arranged in a stepped manner away from one side of the third branch.

11. The base station antenna of claim 8 or 9, wherein, The second branch is in a rectangular shape, the length of the second branch is between 9mm and 30mm, and the width of the second branch is between 1.8mm and 6mm.

12. A communication device, characterized by The base station antenna, the first radio frequency circuit and the second radio frequency circuit are included, the first radio frequency circuit is connected with the first feeding point of the first radiator, and the second radio frequency circuit is connected with the second feeding point of the second radiator.

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