Antennas and base station equipment

Abstract

The embodiment of the present application provides an antenna and a base station device, which relates to the field of communication technology and can reduce interference between radiation units of different frequency bands, thereby improving the coverage capability of the antenna and improving communication performance. The antenna includes: a plurality of first frequency band antenna groups; a plurality of second frequency band radiation units; a reflection plate through hole is arranged on the reflection plate; each first frequency band radiation unit includes: a first balun structure, the first balun structure passes through the reflection plate through hole; a first signal transmission structure, the first signal transmission structure passes through the reflection plate through hole; the phase shifter includes a first phase shifter cavity, a choke cavity and a first feed network signal transmission structure located in the first phase shifter cavity, and the part of the first balun structure in the first frequency band radiation unit located on the second side of the reflection plate is located in the choke cavity; in each first frequency band antenna group, the first signal transmission structure in each first frequency band radiation unit is electrically connected to the first feed network signal transmission structure.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna and a base station device. Background Art

[0002] With the rapid development of wireless communication technology, the requirements for communication performance are becoming increasingly higher, and multi-frequency antennas have emerged. However, when radiating units working in different frequency bands coexist, due to the interference between frequency bands (especially the secondary radiation caused by the induced signals generated by radiating units of different frequency bands on radiating units of other surrounding frequency bands during the radiation process), this interference will interfere with normal communication signals, affect the antenna's coverage capability, and thus affect communication performance. Summary of the invention

[0003] An antenna and base station device can reduce interference between radiation units in different frequency bands, thereby increasing the coverage capability of the antenna and improving communication performance.

[0004] In a first aspect, an antenna is provided, comprising: a plurality of first-frequency-band antenna groups, each of which comprises a phase shifter and a plurality of first-frequency-band radiating units; a plurality of second-frequency-band radiating units; a reflecting plate; a reflecting plate through hole corresponding to each first-frequency-band radiating unit is arranged on the reflecting plate; each first-frequency-band radiating unit comprises: a first radiating structure, the first radiating structure is located on a first side of the reflecting plate; a first balun structure, a portion of the first balun structure is located on the first side of the reflecting plate and is connected to the first radiating structure, the first balun structure passes through the reflecting plate through hole, another portion of the first balun structure is located on the second side of the reflecting plate, and the first balun structure is spaced apart from the reflecting plate ; a first signal transmission structure, the first signal transmission structure and the first balun structure are spaced apart, and the first signal transmission structure passes through the through hole of the reflector; the phase shifter is located on the second side of the reflector, the phase shifter includes a first phase shifter cavity, a choke cavity and a first feed network signal transmission structure located in the first phase shifter cavity, and the choke cavity and the first phase shifter cavity share part of the cavity wall; in each first frequency band antenna group, the part of the first balun structure in each first frequency band radiating unit located on the second side of the reflector is located in the choke cavity; in each first frequency band antenna group, the first signal transmission structure in each first frequency band radiating unit is electrically connected to the first feed network signal transmission structure.

[0005] In a possible embodiment, each first-band radiating unit also includes a second signal transmission structure, which is spaced apart from the first balun structure and passes through the through hole of the reflector plate; the phase shifter also includes a second phase shifter cavity and a second feeding network signal transmission structure located in the second phase shifter cavity, the choke cavity and the second phase shifter cavity share part of the cavity wall, and the first phase shifter cavity and the second phase shifter cavity are respectively located on opposite sides of the choke cavity; in each first-band antenna group, the second signal transmission structure in each first-band radiating unit is electrically connected to the second feeding network signal transmission structure.

[0006] In a possible embodiment, each first-frequency-band radiating unit further includes a first signal derivation structure located outside the choke cavity and outside the first phase shifter cavity; a first signal connection hole corresponding to each first signal derivation structure is provided on the cavity wall of the first phase shifter cavity away from the reflector; a second signal connection hole corresponding to each first signal derivation structure is provided on the cavity wall of the choke cavity away from the reflector; the first signal derivation structure is connected to the first signal transmission structure through the corresponding second signal connection hole, and the first signal derivation structure is connected to the first feed network signal transmission structure through the corresponding first signal connection hole; each first-frequency-band radiating unit further includes a second signal derivation structure located outside the choke cavity and outside the second phase shifter cavity; a third signal connection hole corresponding to each second signal derivation structure is provided on the cavity wall of the second phase shifter cavity away from the reflector; a fourth signal connection hole corresponding to each second signal derivation structure is provided on the cavity wall of the choke cavity away from the reflector; the second signal derivation structure is connected to the second signal transmission structure through the corresponding fourth signal connection hole, and the second signal derivation structure is connected to the second feed network signal transmission structure through the corresponding third signal connection hole.

[0007] In a possible implementation, the cavity wall of the choke cavity is electrically connected to the reflector; and the end of the portion of the first balun structure located in the choke cavity away from the reflector is connected to the cavity wall of the choke cavity.

[0008] In a possible embodiment, in each first frequency band antenna group, multiple first frequency band radiation units are arranged along a first direction, the first phase shifter cavity, the choke cavity and the second phase shifter cavity are arranged along a second direction, the first direction is perpendicular to the second direction, and the first direction and the second direction are parallel to the plane where the reflector is located; the height of the choke cavity is less than half of the wavelength corresponding to the center frequency of the working frequency band of the second frequency band radiation unit, and the height of the choke cavity is the size of the choke cavity in a direction perpendicular to the plane where the reflector is located; the width of the choke cavity is less than one third of the wavelength corresponding to the center frequency of the working frequency band of the second frequency band radiation unit, and the width of the choke cavity is the size of the choke cavity in the second direction.

[0009] In a possible implementation, the first frequency band radiation unit is a dual-polarization radiation unit, the first signal transmission structure is used to feed in a first polarization direction, and the second signal transmission structure is used to feed in a second polarization direction.

[0010] In a possible implementation manner, in the choke cavity, the first balun structure is coated with a dielectric material.

[0011] In a possible implementation manner, the operating frequency band of the first frequency band radiation unit is greater than the operating frequency band of the second frequency band radiation unit.

[0012] In a possible implementation, each second frequency band radiation unit includes a second radiation structure and a second balun structure, the second radiation structure and the second balun structure are located on the first side of the reflection plate, and the second balun structure is connected to the reflection plate.

[0013] In a second aspect, a base station device is provided, comprising the above-mentioned antenna.

[0014] The antenna in the embodiment of the present application combines the phase shifter and the first frequency band radiation unit, and uses part of the cavity wall of the first phase shifter cavity in the phase shifter to form a choke cavity. The choke cavity can suppress the signal of the second frequency band radiation unit during signal transmission or feeding, thereby reducing the interference between radiation units of different frequency bands, improving the coverage capability of the antenna, and improving the communication performance. In addition, the choke cavity is formed by combining the phase shifter and the first frequency band radiation unit, thereby improving the space utilization; and for multiple first frequency band radiation units in the same first frequency band antenna group, since the radiation units are not isolated, multiple radiation units can be excited by using a 1to2 or other form of power divider, thereby increasing the application scenarios of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a base station device in an embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of the structure of an antenna in an embodiment of the present application;

[0017] Figure 3 A top view of an antenna in the related art;

[0018] Figure 4 for Figure 3 A three-dimensional schematic diagram of the structure of the middle part;

[0019] Figure 5 This is a partial structural diagram of an antenna in an embodiment of the present application;

[0020] Figure 6for Figure 5 Schematic diagram of another view of the middle antenna;

[0021] Figure 7 for Figure 5 A top view of the structure of the middle part;

[0022] Figure 8 for Figure 5 A top view when the second frequency band radiation unit is omitted;

[0023] Fig. 9 for Figure 5 A top view when a second frequency band radiation unit is included;

[0024] Fig.10 for Figure 5 A cross-sectional diagram of the middle structure;

[0025] Fig.11 for Figure 5 Bottom view of the middle structure;

[0026] Fig.12 for Figure 5 Schematic diagram of the internal structure of the middle part phase shifter and choke cavity;

[0027] Fig.13 for Figure 5 A three-dimensional enlarged schematic diagram of the structure of the middle part;

[0028] Fig.14 for Fig.10 Another schematic diagram of ;

[0029] Fig.15 A schematic diagram of a gain curve simulation of one polarization direction of the antenna in the embodiment and comparative example of the present application in the frequency band of 0.69 GHz to 0.96 GHz;

[0030] Fig.16 A schematic diagram of a gain curve simulation of another polarization direction of the antenna in the embodiment and comparative example of the present application in the frequency band of 0.69 GHz to 0.96 GHz;

[0031] Fig.17 is the directional diagram of the antenna in Comparative Example 1;

[0032] Fig.18 is the directional diagram of the antenna in Comparative Example 2;

[0033] Fig.19 : is the directional diagram of the antenna in the embodiment of the present application. DETAILED DESCRIPTION

[0034] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0035] First, the basic architecture of the embodiment of the present application is described. The embodiment of the present application relates to a base station device, and the base station device includes a base station antenna system, such as Figure 1 As shown, the base station antenna system includes an antenna 100, a feeder 200, a pole 300, an antenna adjustment bracket 400, a grounding device 500, etc. The feeder 200 has a joint seal 600, which can be made of, for example, an insulating sealing tape or a polyvinyl chloride (PVC) insulating tape. Figure 2 As shown, the radiation unit is also called antenna vibrator, vibrator, etc., which belongs to the unit that constitutes the basic structure of the antenna array, and it can effectively radiate or receive radio waves. The antenna includes at least one antenna array composed of multiple radiation units and reflectors. The frequencies corresponding to different radiation units can be the same or different. The radiation unit is usually placed above the reflector, and the reflector is usually made of metal material. The reflector is also called the bottom plate, antenna panel, metal reflective surface, etc., which is used to improve the receiving sensitivity of the antenna signal and reflect the antenna signal to the receiving point. It not only enhances the receiving / transmitting ability of the antenna, but also blocks and shields the interference of other radio waves from the back (reverse direction) to the received signal. The antenna also includes a feeding network, and the antenna array receives or transmits radio frequency signals through their respective feeding networks. That is, the feeding network feeds the signal to the radiation unit according to a certain amplitude and phase, or sends the received wireless signal to the signal processing unit of the base station according to a certain amplitude and phase. The feeding network includes a controlled impedance transmission line for impedance matching. The feeding network includes a phase shifter, which is used to adjust the phase of the received or transmitted signal. The feeding network may also include devices such as combiners and filters for expanding performance. The antenna may also include a transmission component, through which the direction of different radiation beams can be adjusted. The antenna may also include a calibration network for obtaining a calibration signal. The components in the above antenna can be arranged in a radome, and the feeding network is connected to the signal processing unit of the base station (not shown in the figure) through an antenna connector. The radome is a structural component that protects the antenna system from the external environment. It has good electromagnetic wave penetration characteristics in electrical performance and can withstand the effects of harsh external environments in mechanical performance.

[0036] Before introducing the embodiments of the present application, the related technologies and their technical problems are explained.

[0037] In the related art, the antenna system includes multiple antenna subarrays, one of which operates in the 690MHz to 960MHz frequency band and is composed of low-frequency radiation units, and the other operates in the 1.4GHz to 2.7GHz frequency band and is composed of high-frequency radiation units. When the antenna subarray operating in the 690MHz to 960MHz frequency band is working, a signal in the 690MHz to 960MHz frequency band will be induced on the other antenna subarray. The secondary radiation of this induced signal can interfere with the existing low-frequency signal and affect the integrity of the directional pattern in the 690MHz to 960MHz frequency band. In order to solve this problem, the following is provided: Figure 3 and Figure 4 The antenna structure shown includes a high-frequency radiation unit 01 and a low-frequency radiation unit 02. In this structure, the part of the balun structure 04 corresponding to each high-frequency radiation unit 01 is wrapped by structure 03, so as to reduce the signal interference between radiation units of different frequency bands. However, this structure will bring two problems. One is that additional space is required to set the structure 04, thereby increasing the volume of the antenna; the other problem is that since the balun structure 04 of each high-frequency radiation unit 01 is individually wrapped and isolated, each high-frequency radiation unit 01 can only be excited individually. If it is necessary to excite two high-frequency radiation units 01 through a 1to2 power divider, since the balun structures 04 of the two high-frequency radiation units 01 are isolated by structure 04, it is impossible to simultaneously excite the two high-frequency radiation units 01 through a 1to2 power divider, thereby reducing the application scenarios of the antenna. In order to solve the above problems, a technical solution of an embodiment of the present application is provided, and the technical solution of an embodiment of the present application is described below.

[0038] like Figures 5 to 13 As shown, an embodiment of the present application provides an antenna, comprising: a plurality of first frequency band antenna groups 10, each first frequency band antenna group 10 comprising a phase shifter 20 and a plurality of first frequency band radiation units 1; a plurality of second frequency band radiation units 2; a reflector 3; a reflector through hole 30 corresponding to each first frequency band radiation unit 1 is provided on the reflector 3; each first frequency band radiation unit 1 comprises: a first radiation structure 41, the first radiation structure 41 is located on a first side of the reflector 3, and the first side refers to Fig.10 The upper side of the middle reflector 3; the first balun structure 51, a part of the first balun structure 51 is located on the first side of the reflector 3 and connected to the first radiation structure 41, the first balun structure 51 passes through the reflector through hole 30, and the other part of the first balun structure 51 is located on the second side of the reflector 3, the second side refers to Fig.10On the lower side of the middle reflecting plate 3, the first balun structure 51 is spaced apart from the reflecting plate 3; the first signal transmission structure 61 is spaced apart from the first balun structure 51, and the first signal transmission structure 61 passes through the through hole 30 of the reflecting plate, that is, a part of the first signal transmission structure 61 is located on the first side of the reflecting plate 3, and the other part is located on the second side of the reflecting plate 3. The first signal transmission structure 61 is used to feed the first frequency band radiation unit 1, wherein the first signal transmission structure 61 can be spaced apart from the first balun structure 51 by a dielectric layer, or by air. If the first signal transmission structure 61 and the first balun structure 51 are spaced apart, If the interval is achieved by air, it is necessary to set a supporting structure at some position between the two to achieve the supporting and fixing effect on the first signal transmission structure 61; the phase shifter 20 is located on the second side of the reflector 3, and the phase shifter 20 includes a first phase shifter cavity 101, a choke cavity 111 and a first feeding network signal transmission structure 71 located in the first phase shifter cavity 101, the choke cavity 111 and the first phase shifter cavity 101 share part of the cavity wall, the first feeding network signal transmission structure 71 is used to transmit signals in the first phase shifter cavity 101, and the first phase shifter cavity 101 can change the phase of the signal transmitted by the first feeding network signal transmission structure 71 ( Figures 5 to 9 The first feed network signal transmission structure 71 is not shown); in each first frequency band antenna group 10, the part of the first balun structure 51 in each first frequency band radiating unit 1 located on the second side of the reflector 3 is located in the choke cavity 111, and the choke cavity 111 is used to suppress the signal of the second frequency band radiating unit 2; in each first frequency band antenna group 10, the first signal transmission structure 61 in each first frequency band radiating unit 1 is electrically connected to the first feed network signal transmission structure 71, and the first feed network signal transmission structure 71 extends along the cavity in the first phase shifter cavity 101 to transmit signals, and the first phase shifter cavity 101 extends to the vicinity of each first frequency band radiating unit 1 in the first frequency band antenna group 10, and is electrically connected to each first signal transmission structure 61 in the same group.

[0039] It should be noted that Figures 5 to 13 The figures in the figure are only schematic diagrams, and the structures in different schematic diagrams may be different or not completely corresponding, but this does not affect the relationship between the main structures.

[0040] Specifically, a first frequency band antenna group 10 corresponds to a plurality of first frequency band radiating units 1 and a phase shifter 20, a portion of the first balun structure 51 of each first frequency band radiating unit 1 in the same first frequency band antenna group 10 is located in the same choke cavity 111, and the first signal transmission structure 61 of each first frequency band radiating unit 1 in the same first frequency band antenna group 10 is electrically connected to the same first feeding network signal transmission structure 71 in the same first phase shifter cavity 101. For example, in the process of antenna radiating signals, the RF signal is first transmitted to the first feeding network signal transmission structure 71 in the first phase shifter cavity 101, and is transmitted along the first feeding network signal transmission structure 71, and then the signal is transmitted to the plurality of first signal transmission structures 61, and the first frequency band radiating unit 1 is fed through the first signal transmission structure 61, and radiated through the first radiating structure 41.

[0041] The antenna in the embodiment of the present application combines the phase shifter 20 and the first frequency band radiation unit 1, and uses part of the cavity wall of the first phase shifter cavity 101 in the phase shifter 20 to form a choke cavity 111. The choke cavity 111 can suppress the signal of the second frequency band radiation unit 2 during signal transmission or feeding, thereby reducing the interference between radiation units of different frequency bands, improving the coverage capability of the antenna, and improving the communication performance. In addition, the choke cavity 111 is formed by combining the phase shifter 20 and the first frequency band radiation unit 1, thereby improving the space utilization; and for multiple first frequency band radiation units 1 in the same first frequency band antenna group 10, since the radiation units are not isolated, multiple radiation units can be excited by using a 1to2 or other form of power divider, thereby increasing the application scenarios of the antenna.

[0042] In a possible implementation, each first-band radiation unit 1 further includes a second signal transmission structure 62, which is spaced apart from the first balun structure 51, and passes through the through hole 30 of the reflector plate; the phase shifter 20 further includes a second phase shifter cavity 102 and a second feed network signal transmission structure 72 located in the second phase shifter cavity 102, the choke cavity 111 and the second phase shifter cavity 102 share part of the cavity wall, and the first phase shifter cavity 101 and the second phase shifter cavity 102 are respectively located on opposite sides of the choke cavity 111; in each first-band antenna group 10, the second signal transmission structure 62 in each first-band radiation unit 1 is electrically connected to the second feed network signal transmission structure 72. The first signal transmission structure 61 and the second signal transmission structure 62 can be used to realize feeding in different polarization directions, so that the first-band radiation unit 1 radiates in two polarization directions, realizing, for example, a dual-polarization antenna. Signals corresponding to the two polarization directions are fed through different signal transmission structures, and two phase shifter cavities corresponding to the two polarization direction signals need to be set, and the two phase shifter cavities are set on opposite sides of the choke cavity 111, so that the side walls of the two phase shifter cavities are used to form the side walls of the choke cavity 111, so as to improve the space utilization rate and enable the choke cavity 111 to have a better effect of suppressing antenna signals in other frequency bands. Fig.10 As shown, the first phase shifter cavity 101 is located on the left side of the choke cavity 111, and the two share a portion of the cavity wall therebetween; the second phase shifter cavity 102 is located on the right side of the choke cavity 111, and the two share a portion of the cavity wall therebetween.

[0043] In a possible implementation, Figures 5 to 13As shown, each first frequency band radiation unit 1 also includes a first signal derivation structure 81 located outside the choke cavity 111 and outside the first phase shifter cavity 101; a first signal connection hole 401 corresponding to each first signal derivation structure 81 is provided on the cavity wall on the side of the first phase shifter cavity 101 away from the reflector 3; a second signal connection hole 402 corresponding to each first signal derivation structure 81 is provided on the cavity wall on the side of the choke cavity 111 away from the reflector 3; the first signal derivation structure 81 is connected to the first signal transmission structure 61 through the corresponding second signal connection hole 402, and the first signal derivation structure 81 is connected to the first feed network signal transmission structure 71 through the corresponding first signal connection hole 401, so that the first feed network signal transmission structure 71 is electrically connected to all the first signal transmission structures 61 in the same first frequency band antenna group 10. 1; each first frequency band radiation unit 1 also includes a second signal derivation structure 82 located outside the choke cavity 111 and outside the second phase shifter cavity 102; a third signal connection hole 403 corresponding to each second signal derivation structure 82 is provided on the cavity wall on the side of the second phase shifter cavity 102 away from the reflector 3; a fourth signal connection hole 404 corresponding to each second signal derivation structure 82 is provided on the cavity wall on the side of the choke cavity 111 away from the reflector 3; the second signal derivation structure 82 is connected to the second signal transmission structure 62 through the corresponding fourth signal connection hole 404, and the second signal derivation structure 82 is connected to the second feed network signal transmission structure 72 through the corresponding third signal connection hole 403, so that the second feed network signal transmission structure 72 is electrically connected to all second signal transmission structures 62 in the same first frequency band antenna group 10.

[0044] In one possible embodiment, the cavity wall of the choke cavity 111 is electrically connected to the reflecting plate 3 so that the reflecting plate 3 is connected to a fixed potential. For example, when grounded, the cavity wall of the choke cavity 111 is also grounded; the end of the first balun structure 51 located in the choke cavity 111 away from the reflecting plate 3 is connected to the cavity wall of the choke cavity 111, that is, the first balun structure 51 will not be directly connected to the reflecting plate 3 at the position of the reflecting plate 3 to achieve grounding, but will pass through the reflecting plate through hole 30 and then connect to the cavity wall at the bottom of the choke cavity 111 to achieve grounding.

[0045] In a possible implementation, in each first frequency band antenna group 10, a plurality of first frequency band radiation units 1 are arranged along a first direction Y. For example, the embodiment of the present application illustrates four columns of first frequency band radiation units 1 and two columns of second frequency band radiation units 2. The first phase shifter cavity 101, the choke cavity 111, and the second phase shifter cavity 102 are arranged along a second direction X. The first direction Y is perpendicular to the second direction X. The first direction Y and the second direction X are both parallel to the plane where the reflector 3 is located. The height h of the choke cavity 111 is less than half of the wavelength corresponding to the center frequency of the working frequency band of the second frequency band radiation unit 2. The height h of the choke cavity 111 is the size of the choke cavity 111 in a direction perpendicular to the plane of the reflector 3, that is, the size of the choke cavity 111 in the first direction Y; the width w of the choke cavity 111 is less than one-third of the wavelength corresponding to the center frequency of the working frequency band of the second-band radiation unit 2. For example, the width w of the choke cavity 111 is equal to one-fourth of the wavelength corresponding to the center frequency of the working frequency band of the second-band radiation unit 2. The width of the choke cavity 111 is the size of the choke cavity 111 in the second direction X. Under the above dimensions, the choking effect of the choke cavity 111 can be made more significant. It should be noted that the embodiment of the present application has no special restrictions on the layout relationship between the first-band radiation unit 1 and the second-band radiation unit 2, as long as the mechanical size restrictions are met and they can be deployed under the same physical caliber.

[0046] In a possible implementation, the first frequency band radiation unit 1 is a dual-polarization radiation unit, the first signal transmission structure 61 is used to feed in a first polarization direction, and the second signal transmission structure 62 is used to feed in a second polarization direction. The first polarization direction may be perpendicular to the second polarization direction to form a vertical dual-polarization radiation unit. Fig.13 As shown, the first frequency band radiation unit 1 includes four first radiation structures 41, and two opposite first radiation structures 41 form a group, with a total of two groups of radiation structures, one group of radiation structures corresponds to one polarization direction, and the other group of radiation structures corresponds to another polarization direction. The first signal transmission structure 61 feeds from one radiation structure in the same group to another radiation structure, and the second signal transmission structure 62 feeds from one radiation structure in another group to another radiation structure.

[0047] In a possible implementation, Fig.14 As shown, in the choke cavity 111, the first balun structure 51 is coated with a dielectric material 60, and the choke cavity 111 and the first balun structure 51 constitute a choke device. The working frequency band of the choke device is used to suppress signals of the corresponding frequency band. By setting the dielectric constant of the dielectric material 60, the working frequency band of the choke device can be controlled in accordance with the size of the choke cavity 111 and the effective length of the first balun structure 51 extending into the choke cavity 111.

[0048] In a possible implementation, the operating frequency band of the first frequency band radiation unit 1 is greater than the operating frequency band of the second frequency band radiation unit 2, that is, the first frequency band radiation unit 1 is a high frequency unit in the antenna, and the second frequency band radiation unit 2 is a low frequency unit in the antenna. For example, the operating frequency band of the first frequency band radiation unit 1 is 1.4GHz-2.7GHz, and the operating frequency band of the second frequency band radiation unit 2 is 0.69GHz to 0.96GHz.

[0049] In a possible implementation, each second frequency band radiation unit 2 includes a second radiation structure 42 and a second balun structure 52 , the second radiation structure 42 and the second balun structure 52 are located on a first side of the reflection plate 3 , and the second balun structure 52 is connected to the reflection plate 3 .

[0050] The following is a comparison of the simulation curves between the embodiment of the present application and the comparative example to illustrate the effect of the embodiment of the present application: Fig.15 and Fig.16 As shown, Fig.15 The schematic diagram of the simulation of the gain curve of one polarization direction of the antenna in the embodiment and the comparative example of the present application in the frequency band of 0.69 GHz to 0.96 GHz is shown, Fig.16 The schematic diagram of the simulation of the gain curve of the other polarization direction of the antenna in the frequency band of 0.69 GHz to 0.96 GHz in the embodiments of the present application and the comparative examples is illustrated, wherein comparative example 1 represents a schematic diagram of the simulation of the gain curve of the antenna in which only the low-frequency radiation unit with a working frequency band of 0.69 GHz to 0.96 GHz is set to work, and no radiation unit in other frequency bands is set; comparative example 2 represents a schematic diagram of the simulation of the gain curve of the antenna in which the low-frequency radiation unit with a working frequency band of 0.69 GHz to 0.96 GHz and the high-frequency radiation unit with a working frequency band of 1.4 GHz-2.7 GHz are directly connected together, that is, the low-frequency radiation unit and the high-frequency radiation unit are directly connected to the reflector. According to the comparison of the above three curves, it can be seen that the gain index of the antenna in the embodiment of the present application is basically the same as when there is no high-frequency radiation unit, that is, the interference between the radiation units in different frequency bands in the embodiment of the present application is very small. Figures 17 to 19 As shown, Fig.17 represents the directional pattern of the antenna in Comparative Example 1, Fig.18 represents the directional pattern of the antenna in Comparative Example 2, Fig.19 The directional pattern of the antenna in the embodiment of the present application is shown. It can be seen that the directional pattern index of the antenna in the embodiment of the present application is basically equivalent to that when there is no high-frequency radiation unit, that is, the interference between the radiation units of different frequency bands in the embodiment of the present application is very small.

[0051] The present application also provides a base station device, including the antenna in any of the above embodiments. The specific structure and principle of the antenna are the same as those in the above embodiments, and will not be repeated here. For the basic structure of the base station device, please refer to Figure 1 and Figure 2 As shown, and the related description.

[0052] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0053] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna, It is characterized in that include: A plurality of first frequency band antenna groups, each of which comprises a phase shifter and a plurality of first frequency band radiation units; A plurality of second frequency band radiation units; Reflective panels; The reflector is provided with a reflector through hole corresponding to each of the first frequency band radiation units; Each of the first frequency band radiation units comprises: a first radiation structure, wherein the first radiation structure is located on a first side of the reflection plate; a first balun structure, wherein a portion of the first balun structure is located on a first side of the reflector and connected to the first radiation structure, the first balun structure passes through a through hole of the reflector, another portion of the first balun structure is located on a second side of the reflector, and the first balun structure is spaced from the reflector; a first signal transmission structure, wherein the first signal transmission structure is spaced apart from the first balun structure, and the first signal transmission structure passes through the through hole of the reflection plate; The phase shifter is located on the second side of the reflector, and comprises a first phase shifter cavity, a choke cavity, and a first feed network signal transmission structure located in the first phase shifter cavity, and the choke cavity and the first phase shifter cavity share part of the cavity wall; In each first-frequency-band antenna group, a portion of the first balun structure in each first-frequency-band radiation unit located on the second side of the reflection plate is located in the choke cavity; In each first-frequency-band antenna group, the first signal transmission structure in each first-frequency-band radiation unit is electrically connected to the first feeding network signal transmission structure.

2. The antenna according to claim 1, It is characterized in that Each of the first frequency band radiation units further includes a second signal transmission structure, the second signal transmission structure is spaced apart from the first balun structure, and the second signal transmission structure passes through the through hole of the reflection plate; The phase shifter further includes a second phase shifter cavity and a second feed network signal transmission structure located in the second phase shifter cavity, the choke cavity and the second phase shifter cavity share a portion of the cavity wall, and the first phase shifter cavity and the second phase shifter cavity are respectively located on opposite sides of the choke cavity; In each first-frequency-band antenna group, the second signal transmission structure in each first-frequency-band radiation unit is electrically connected to the second feed network signal transmission structure.

3. The antenna according to claim 2, It is characterized in that Each of the first frequency band radiation units further includes a first signal derivation structure located outside the choke cavity and outside the first phase shifter cavity; A first signal connection hole corresponding to each of the first signal derivation structures is provided on a cavity wall of the first phase shifter cavity away from the reflector; A second signal connection hole corresponding to each of the first signal derivation structures is provided on a cavity wall of the choke cavity on one side away from the reflector; The first signal derivation structure is connected to the first signal transmission structure through the corresponding second signal connection hole, and the first signal derivation structure is connected to the first feed network signal transmission structure through the corresponding first signal connection hole; Each of the first frequency band radiation units further includes a second signal derivation structure located outside the choke cavity and outside the second phase shifter cavity; A third signal connection hole corresponding to each of the second signal derivation structures is provided on a cavity wall of the second phase shifter cavity away from the reflector; A fourth signal connection hole corresponding to each of the second signal derivation structures is provided on a cavity wall of the choke cavity on one side away from the reflector; The second signal derivation structure is connected to the second signal transmission structure through the corresponding fourth signal connection hole, and the second signal derivation structure is connected to the second feed network signal transmission structure through the corresponding third signal connection hole.

4. The antenna according to claim 1, It is characterized in that The cavity wall of the choke cavity is electrically connected to the reflector; An end of the portion of the first balun structure located in the choke cavity away from the reflection plate is connected to a cavity wall of the choke cavity.

5. The antenna according to claim 2, It is characterized in that In each first-frequency-band antenna group, the plurality of first-frequency-band radiation units are arranged along a first direction, the first phase shifter cavity, the choke cavity, and the second phase shifter cavity are arranged along a second direction, the first direction is perpendicular to the second direction, and the first direction and the second direction are both parallel to the plane where the reflector is located; The height of the choke cavity is less than half of the wavelength corresponding to the center frequency of the working frequency band of the second frequency band radiation unit, and the height of the choke cavity is the size of the choke cavity in a direction perpendicular to the plane where the reflector is located; The width of the choke cavity is smaller than one third of the wavelength corresponding to the center frequency of the working frequency band of the second frequency band radiation unit, and the width of the choke cavity is the size of the choke cavity in the second direction.

6. The antenna according to claim 2, It is characterized in that The first frequency band radiation unit is a dual-polarization radiation unit, the first signal transmission structure is used for feeding in a first polarization direction, and the second signal transmission structure is used for feeding in a second polarization direction.

7. The antenna according to claim 1, It is characterized in that In the choke cavity, the first balun structure is coated with dielectric material.

8. The antenna according to claim 1, It is characterized in that The operating frequency band of the first-frequency-band radiating unit is greater than the operating frequency band of the second-frequency-band radiating unit.

9. The antenna according to claim 1, It is characterized in that Each of the second-frequency-band radiation units includes a second radiation structure and a second balun structure. The second radiation structure and the second balun structure are located on the first side of the reflection plate. The second balun structure is connected to the reflection plate.

10. A base station device, It is characterized in that Comprising the antenna as claimed in any one of claims 1 to 9.

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