Antenna assembly

Abstract

The utility model discloses an antenna assembly, and belongs to the technical field of antennas. The antenna assembly comprises a reflecting plate, an oscillator feed plate, a phase shifter and a feed conductor, the reflecting plate is arranged between the oscillator feed plate and the phase shifter, and the feed conductor penetrates through the reflecting plate and is electrically connected with the oscillator feed plate and the phase shifter. According to the antenna assembly, connection between the phase shifter and the oscillator feed panel can be realized without using a coaxial cable, the antenna structure is simplified, and the antenna assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to an antenna component. Background Art

[0002] The base station antenna is an important part of the communication system. The base station antenna usually includes components such as a radiation unit, a reflector, a radome and a phase shifter. The radiation unit is arranged on one side of the reflector, and the phase shifter is arranged on the opposite side of the reflector. At present, when the phase shifter is electrically connected to the dipole feed plate in the radiation unit, a coaxial cable is usually used for connection. The outer conductor and the inner conductor of the coaxial cable are connected to the corresponding components by welding. However, this connection method brings many disadvantages, such as many welding points, low antenna assembly efficiency, and complex antenna structure.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] The purpose of the utility model is to provide an antenna assembly, which can realize the connection between the phase shifter and the dipole feeding plate without using a coaxial cable, and can at least simplify the antenna structure and improve the antenna assembly efficiency.

[0005] To achieve the above-mentioned object, an embodiment of the utility model provides an antenna assembly, including a reflector;

[0006] A vibrator feeding plate, arranged on one side of the reflecting plate and coupled to the reflecting plate;

[0007] a phase shifter, disposed on an opposite side of the reflector and connected to the reflector;

[0008] A feeding conductor passes through the reflection plate and electrically connects the signal line layer and the signal processing circuit.

[0009] In one or more embodiments of the present invention, the dipole feeding plate includes a signal line layer and a ground layer, and the ground layer is located between the signal line layer and the reflection plate and is coupled to the reflection plate.

[0010] In one or more embodiments of the present utility model, the vibrator feeding plate further includes

[0011] A dielectric layer is located between the signal line layer and the ground layer.

[0012] In one or more embodiments of the present utility model, the vibrator feeding plate further includes

[0013] An insulating layer is located between the ground layer and the reflective plate.

[0014] In one or more embodiments of the present invention, the phase shifter includes a cavity and a signal processing circuit disposed in the cavity, and the cavity is connected to the reflection plate.

[0015] In one or more embodiments of the present invention, the cavity is provided with a protrusion, and the cavity is connected to the reflective plate via the protrusion.

[0016] In one or more embodiments of the present invention, at least one resonance elimination structure configured to eliminate resonance is provided in the coupling region between the dipole feeding plate and the reflection plate.

[0017] In one or more embodiments of the present invention, the resonance elimination structure includes a window.

[0018] In one or more embodiments of the present invention, in the width direction of the reflective plate, the width of the window is not less than M, where M is a real number not less than zero.

[0019] In one or more embodiments of the present invention, in the width direction of the reflector, the minimum distance between the edge of the window and the feed conductor is not less than N, where N is a real number not less than zero.

[0020] In one or more embodiments of the present invention, when the antenna assembly operates at 1.4 GHz to 2.8 GHz, the width of the window in the width direction of the reflector is not less than 5 mm, and the minimum distance between the window and the feed conductor in the width direction of the reflector is not less than 10 mm.

[0021] In one or more embodiments of the present invention, when the antenna assembly operates at 0.5 GHz to 1 GHz, the width of the window in the width direction of the reflector is not less than 10 mm, and the minimum distance between the window and the feed conductor in the width direction of the reflector is not less than 18 mm.

[0022] In one or more embodiments of the present utility model, the antenna assembly further includes a radiation unit electrically connected to the dipole feed plate, and the dipole feed plate is between the radiation unit and the reflection plate.

[0023] In one or more embodiments of the present invention, the radiation unit includes a plurality of radiation vibrators, and the plurality of radiation vibrators are arranged along the length direction of the cavity and are located on the center line of the cavity.

[0024] In one or more embodiments of the present invention, the radiation unit includes a plurality of radiation vibrators, and the plurality of radiation vibrators and the vibrator feeding plate are in the same plane or in a different plane.

[0025] Compared with the prior art, (1) the utility model realizes electrical connection between the phase shifter and the dipole feed plate by using a feeding conductor to connect the phase shifter and the dipole feed plate, thereby avoiding the use of coaxial cables, effectively reducing welding points, simplifying the antenna structure, and improving the antenna assembly efficiency.

[0026] (2) The utility model provides a resonance elimination structure on the reflector, so that the resonance can drift outside the antenna frequency band, thereby eliminating the resonance and preventing it from affecting the signal transmission performance within the antenna working frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a perspective view of an antenna assembly according to an embodiment of the present utility model;

[0028] Figure 2 is a cross-sectional view of an antenna assembly according to an embodiment of the present utility model;

[0029] Figure 3 is a cross-sectional view of a vibrator feeding plate according to an embodiment of the utility model;

[0030] Figure 4 It is a schematic diagram of the position relationship between the window of the reflector plate and the grounding layer of the dipole feeding plate according to an embodiment of the utility model;

[0031] Figure 5 It is a simulated S11 curve corresponding to an antenna operating at low frequency and without a window on the reflector according to an embodiment of the present utility model;

[0032] Figure 6 It is a simulated S11 curve corresponding to an antenna operating at high frequency and without a window on the reflector according to an embodiment of the present utility model;

[0033] Figure 7 It is a simulated S11 curve corresponding to an antenna operating at a low frequency and having a reflector with a window according to an embodiment of the present utility model;

[0034] Figure 8 It is a simulated S11 curve corresponding to an antenna operating at high frequency and with a reflector having a window according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0036] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0037] like Figure 1 As shown, according to an antenna assembly in a preferred embodiment of the present invention, the connection between the phase shifter 30 and the dipole feeding plate 20 can be achieved without using a coaxial cable, which can at least simplify the antenna structure and improve the antenna assembly efficiency.

[0038] Specifically, the antenna assembly includes a reflector 10, a dipole feed plate 20, a phase shifter 30 and a feed conductor 40. The reflector 10 is configured to reflect electromagnetic waves. The dipole feed plate 20 is arranged on one side of the reflector 10 and is coupled to the reflector 10, and is configured to transmit a signal to a radiating dipole (not shown), or receive a signal through the radiating dipole and transmit the received signal to a signal processing unit of a base station. The phase shifter 30 is arranged on the other side of the reflector 10 and is connected to the reflector 10, that is, the reflector 10 is between the phase shifter 30 and the dipole feed plate 20. The feed conductor 40 runs through the reflector 10, one end of which is electrically connected to the dipole feed plate 20, and the opposite end is electrically connected to the phase shifter 30. By using the feed conductor 40 to connect the phase shifter and the dipole feed plate, the electrical connection between the phase shifter and the dipole feed plate is realized, the use of coaxial cables is avoided, the welding points can be effectively reduced, the antenna structure is simplified, and the antenna assembly efficiency is improved.

[0039] Further, the dipole feed plate 20 includes a signal line layer 21 and a ground layer 22, wherein the ground layer 22 is located between the signal line layer 21 and the reflector 10 and is coupled to the reflector 10. The phase shifter 30 includes a cavity 31 and a signal processing circuit 32, wherein the signal processing circuit 32 is disposed in the cavity 31, the cavity 31 is connected to the reflector 10, and the signal processing circuit 32 is electrically connected to the signal line layer 21 of the dipole feed plate 20 through a feed conductor 40, that is, one end of the feed conductor 40 passes through the cavity 31 and is electrically connected to the signal processing circuit 32, and the opposite end passes through the reflector 10 and is electrically connected to the signal line layer 21 of the dipole feed plate 20. The signal processing circuit 32 in the cavity 31 of the phase shifter 30 and the dipole feeding plate 20 are connected by using a feeding conductor 40, and at the same time, the cavity 31 of the phase shifter 30 is connected to the reflecting plate 10, and the grounding layer 22 of the dipole feeding plate 20 is coupled to the reflecting plate 10, so as to finally realize the electrical connection between the phase shifter 30 and the dipole feeding plate 20, avoid the use of coaxial cables, effectively reduce welding points, simplify the antenna structure, and improve the antenna assembly efficiency.

[0040] like Figure 3As shown, the dipole feed plate 20 preferably has a microstrip line structure, and the dipole feed plate 20 includes a signal line layer 21, a ground layer 22 and a dielectric layer 23, and the dielectric layer 23 is located between the signal line layer 21 and the ground layer 22. Of course, in other embodiments, the dipole feed plate 20 may also select a stripline structure, which can be selected according to actual needs.

[0041] Furthermore, if Figure 3 As shown, the vibrator feed plate 20 also includes an insulating layer 24, and the insulating layer 24 is located between the ground layer 22 and the reflector 10. The insulating layer 24 can be used to couple the ground layer 22 of the vibrator feed plate 20 with the reflector 10. By adopting the coupling connection, welding and other operations can be avoided, which is convenient for installation and reduces the risk of PIM. The insulating layer 24 is green oil (liquid photoresist) coated on the surface of the ground layer 22.

[0042] In this embodiment, the vibrator feeding plate 20 is preferably fixedly connected to the reflector 10 by means of plastic rivets. Of course, in other embodiments, the vibrator feeding plate 20 can also be fixed to the reflector 10 by other means, as long as the two are stably connected.

[0043] like Figure 2 As shown, the cavity 31 of the phase shifter 30 is provided with a protrusion 311 protruding toward the reflecting plate 10, and the cavity 31 is connected to the reflecting plate 10 through the protrusion 311. The connection here includes but is not limited to direct physical connection (such as direct contact between the two), or coupled connection, and the corresponding connection method can be selected according to actual needs during specific implementation. When the phase shifter 30 is connected to the reflecting plate 10, the cavity 31 and the reflecting plate 10 can be fixedly connected as one body by fixing bolts M, and the cavity 31 is connected to the reflecting plate 10 through the protrusion 311 thereon. By fixing the cavity 31 and the reflecting plate 10 with bolts, and connecting the cavity 31 to the reflecting plate 10 with the protrusion 311, the phase shifter 30 can be stably connected to the reflecting plate 10 and the passive intermodulation (PIM) can be effectively improved.

[0044] Combination Figure 3 and Figure 4 As shown, when there is an insulating layer 24 (green oil) between the ground layer 22 of the dipole feed plate 20 and the reflector 10, it is easy to cause resonance between the ground layer 22 and the reflector 10, and the resonance is easily affected by the coupling area between the two, which ultimately affects the signal transmission performance of the antenna within the working frequency band. In order to eliminate the resonance, the utility model sets at least one resonance elimination structure on the reflector 10, and the resonance elimination structure is located in the coupling area between the reflector 10 and the ground layer 22.

[0045] In this embodiment, the resonance elimination structure includes a window, and the window 11 is located in the coupling region between the reflector 10 and the ground layer 22, and the width of the window 11 in the width direction of the reflector 10 is greater than the width of the ground layer 22. Figure 4 As shown, two windows 11 are provided on the reflector 10, and in the width direction W of the reflector, the width of the windows 11 is greater than the width of the ground layer 22, so as to divide the continuous coupling area into multiple discontinuous areas. By providing the windows 11 with a width greater than the width of the ground layer 22 on the reflector 10, the resonance can be shifted outside the antenna working frequency band, thereby eliminating the resonance and preventing it from affecting the signal transmission performance within the antenna working frequency band.

[0046] Furthermore, in order to better eliminate resonance, the position and size of the window 11 must meet certain requirements. Figure 4 As shown, in the length direction L of the reflector 10, the minimum distance between the edge of the window 11 and the feed conductor 40 must be no less than M, where M is a real number greater than zero. Here, M is preferably 10 mm and can be set according to actual needs.

[0047] Alternatively, in the width direction W of the reflector 10, the width of the window 11 is not less than N, where N is a real number greater than 0. Here, N is preferably 5 mm, which can be set according to actual needs.

[0048] Alternatively, in the length direction L of the reflector 10, the minimum distance between the edge of the window 11 and the feed conductor 40 must be no less than M, and in the width direction W of the reflector 10, the width of the window 11 must be no less than N, where M and N are real numbers greater than zero, and M is preferably 10 mm and N is preferably 5 mm. Figure 4 As shown, when the antenna operates at a high frequency (1.4 GHz to 2.8 GHz), the minimum distance between the edge of the window 11 and the feed conductor 40 in the length direction L of the reflector 10 is not less than 10 mm, and the width of the window 11 in the width direction W of the reflector 10 is not less than 5 mm. When the antenna operates at a low frequency (0.5 GHz to 1 GHz), the minimum distance between the edge of the window 11 and the feed conductor 40 in the length direction L of the reflector 10 is not less than 18 mm, and the width of the window 11 in the width direction W of the reflector 10 is not less than 10 mm. By setting the position of the window 11 and the size of the window 11 within the above range, resonance can be better eliminated and signal transmission performance can be improved.

[0049] Combination Figures 5 to 8 As shown, Figure 5 and Figure 6 It is the S11 curve of antenna simulation when the window 11 structure is not adopted, where: Figure 5 The simulated S11 curve corresponding to the antenna working at low frequency is: Figure 6is the simulated S11 curve corresponding to the antenna working at high frequency. Figure 5 and Figure 6 It can be seen that when the window 11 structure is not adopted, the antenna working at low frequency (0.5GHz-1GHz) resonates at 0.6GHz, and the antenna working at high frequency (1.4GHz-2.8GHz) resonates at 1.9GHz and so on.

[0050] Figure 7 and Figure 8 The S11 curve of antenna simulation when the window 11 structure is adopted, where: Figure 7 The simulated S11 curve corresponding to the antenna working at low frequency is: Figure 8 is the simulated S11 curve corresponding to the antenna working at high frequency. Figure 7 and Figure 8 It can be seen that when the window 11 structure is set on the reflector, the antenna working at low frequency resonates at 0.43GHz, which is outside the antenna working frequency band. Therefore, the resonance is eliminated by adopting the window 11 structure. Similarly, when the window 11 structure is set on the reflector, the resonance generated by the antenna working at high frequency is significantly reduced compared to when the window 11 is not used. That is, the window 11 structure set on the reflector can effectively eliminate the resonance and improve the signal transmission performance.

[0051] Further, the antenna assembly also includes a radiation unit (not shown in the figure), and a dipole feed plate 20 is provided between the radiation unit and the reflector 10, and the dipole feed plate 20 is electrically connected to the radiation unit to transmit the signal to the radiation unit, or receive the signal through the radiation unit and transmit the received signal to the signal processing unit of the base station. The radiation unit here includes at least one radiation dipole, and the radiation dipole is electrically connected to the signal line layer 21 in the dipole feed plate 20. In a specific implementation, the position of the radiation dipole can be set according to actual needs, such as the radiation dipole can be arranged along the length direction of the cavity 31 of the phase shifter 30, and it is best for several radiation dipoles to be arranged along the center line of the cavity 31. For example, several radiation dipoles are not arranged along the center line of the cavity 31, and the dipole feed plate 20 and the radiation dipole are in the same plane, or several radiation dipoles are not arranged along the center line of the cavity 31, and the dipole feed plate 20 and the radiation dipole are not in the same plane.

[0052] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. An antenna assembly, characterized in that: include Reflective panels; A vibrator feeding plate, arranged on one side of the reflecting plate and coupled to the reflecting plate; a phase shifter, disposed on an opposite side of the reflector and connected to the reflector; A feeding conductor passes through the reflection plate and electrically connects the dipole feeding plate and the phase shifter.

2. The antenna assembly according to claim 1, wherein: The dipole feeding plate comprises a signal line layer and a ground layer, wherein the ground layer is located between the signal line layer and the reflection plate and is coupled to the reflection plate.

3. The antenna assembly according to claim 2, wherein: The vibrator feeding plate also includes A dielectric layer is located between the signal line layer and the ground layer.

4. The antenna assembly according to claim 2, wherein: The vibrator feeding plate also includes An insulating layer is located between the ground layer and the reflective plate.

5. The antenna assembly according to claim 1, wherein: The phase shifter includes a cavity and a signal processing circuit arranged in the cavity, and the cavity is connected to the reflection plate.

6. The antenna assembly according to claim 5, characterized in that The cavity is provided with a protrusion, and the cavity is connected to the reflection plate through the protrusion.

7. The antenna assembly according to claim 1, wherein: At least one resonance elimination structure configured to eliminate resonance is provided in a coupling region between the dipole feeding plate and the reflection plate.

8. The antenna assembly according to claim 7, wherein: The resonance elimination structure includes a window.

9. The antenna assembly according to claim 8, wherein: The width of the opening in the width direction of the reflection plate is greater than the width of the ground layer of the dipole feeding plate.

10. The antenna assembly according to claim 8, wherein: When the antenna assembly operates at 1.4 GHz to 2.8 GHz, the width of the window in the width direction of the reflector is not less than 5 mm, and the minimum distance between the window and the feed conductor in the width direction of the reflector is not less than 10 mm.

11. The antenna assembly according to claim 8, wherein: When the antenna assembly operates at 0.5 GHz to 1 GHz, the width of the window in the width direction of the reflector is not less than 10 mm, and the minimum distance between the window and the feed conductor in the width direction of the reflector is not less than 18 mm.

12. The antenna assembly according to claim 1, wherein: The antenna assembly further comprises a radiation unit electrically connected to the dipole feed plate, and the dipole feed plate is between the radiation unit and the reflection plate.

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