Multi-array base station antenna

Abstract

The invention discloses a multi-array base station antenna, which comprises a reflecting plate, and a plurality of low-frequency antenna arrays are arranged on the front surface of the reflecting plate; the low-frequency antenna array comprises a plurality of low-frequency oscillators; the plurality of low-frequency antenna arrays are arranged in parallel; a side wall is arranged between the adjacent low-frequency antenna arrays; the extension direction of the side wall is consistent with the extension direction of the reflecting plate; the side wall is composed of a plurality of side wall plates, and a gap is formed between every two adjacent side wall plates. The extension direction of the side wall plate is consistent with the extension direction of the reflecting plate; and the length size of the side wall plate is equal to one half of the working frequency wavelength of the low-frequency oscillator. Through the arrangement of the side wall plate, the problem of mutual interference between same-frequency oscillators in the low-frequency oscillator array is solved.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a multi-array base station antenna. Background Art

[0002] Due to the low radiation efficiency of a single oscillator antenna and the requirement for small modular antennas, multi-array multi-port antenna modes are often used. However, the multi-array multi-port antenna mode has the problem of mutual interference between oscillators of the same frequency, and the mutual interference between oscillators of the same frequency in a low-frequency oscillator array is particularly serious.

[0003] How to solve the above-mentioned technical problems has become a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0004] In order to at least solve the above technical problems, the purpose of the present invention is to provide a multi-array base station antenna, which solves the problem of mutual interference between same-frequency oscillators in a low-frequency oscillator array by setting side wall panels.

[0005] In order to achieve the above-mentioned purpose, the multi-array base station antenna provided in this application includes: A reflector plate, wherein a plurality of low-frequency antenna arrays are arranged on the front side of the reflector plate; The low-frequency antenna array includes a plurality of low-frequency oscillators; Multiple low-frequency antenna arrays are arranged in parallel; A side wall is provided between adjacent low frequency antenna arrays; The extension direction of the side wall is consistent with the extension direction of the reflector; The side wall is composed of a plurality of side wall panels, and gaps are provided between adjacent side wall panels; The extending direction of the side wall plate is consistent with the extending direction of the reflector plate; The length of the side wall plate is equal to half of the wavelength of the working frequency of the low-frequency oscillator.

[0006] Furthermore, a support plate is provided in the middle of the side wall plate, one end of the support plate is connected to the center of the side wall plate, and the other end is connected to the reflective plate; A groove is provided at one end of the support plate connected to the side wall plate, and the groove extends in the direction opposite to the reflection plate and penetrates the side wall plate.

[0007] Furthermore, the low-frequency vibrator is fixed on the reflector through a support base; The center point of the support plate is located on the center point of the line connecting the support bases of the low-frequency oscillators between adjacent low-frequency antenna arrays.

[0008] Furthermore, the gap between the side wall panels is 5-10 mm.

[0009] Furthermore, an electric bridge is provided on the back of the reflector; The electric bridge is arranged at the end of the reflector; The phase difference between the input ports of the bridge is 90°; The phase difference between the output ports of the bridge is 0°.

[0010] Furthermore, the back of the reflector is also provided with: a power splitter and a phase shifter; The number of power splitters is equal to the number of low-frequency oscillators minus the number of shared low-frequency oscillators; Adjacent low-frequency oscillators between low-frequency antenna arrays share a power splitter board; A port is arranged at the back side of the reflector plate at one end away from the bridge.

[0011] Furthermore, the low-frequency oscillator is rectangular; The diagonal length of the upper surface of the low-frequency oscillator is half of the wavelength of the working frequency of the low-frequency oscillator.

[0012] Furthermore, a feeding plate placement area is provided in the middle area of ​​the upper surface of the low-frequency oscillator, and the feeding plate placement area is used to place the feeding plate; A through hole area is provided on both sides of the midline of the upper surface of the low-frequency oscillator, and the through hole area is arranged away from the feeding plate placement area; The corners of the upper surface of the low-frequency oscillator are provided with sword angles protruding in a direction away from the feeding plate; A clearance area is also provided between the adjacent through-hole area and the frame of the upper surface of the low-frequency oscillator; The wiring on the upper surface of the low frequency oscillator surrounds the through hole area and follows the edge of the avoidance area to the sword angle.

[0013] Further, the through hole area is provided with a through hole array; The width dimension of the through hole array on one side of the center line is equal to half the width dimension of the feeding plate placement area.

[0014] Furthermore, the diagonal traces on the upper surface of the low-frequency oscillator are connected via a feeding plate.

[0015] The multi-array base station antenna of the embodiment of the present application includes: a reflector, a plurality of low-frequency antenna arrays are arranged on the front of the reflector; the low-frequency antenna array includes a plurality of low-frequency oscillators; the plurality of low-frequency antenna arrays are arranged in parallel; a side wall is provided between adjacent low-frequency antenna arrays; the extension direction of the side wall is consistent with the extension direction of the reflector; the side wall is composed of a plurality of side wall panels, and gaps are provided between adjacent side wall panels; the extension direction of the side wall panels is consistent with the extension direction of the reflector; the length of the side wall panels is equal to half of the wavelength of the working frequency of the low-frequency oscillator. By setting side walls between adjacent low-frequency antenna arrays, the problem of mutual interference between same-frequency oscillators in the low-frequency oscillator array is solved; by setting grooves and coordinating the grooves with the side walls, the problem of mutual interference between same-frequency oscillators in the low-frequency oscillator array is further solved; by designing through-hole areas, avoidance areas and sword angles on the low-frequency oscillators, the length of the routing is extended, the bandwidth of the low-frequency oscillators is increased, the return loss performance is improved, and the resonance between low-frequency antennas is reduced; by designing the bridge, low-frequency oscillators can be borrowed between low-frequency antenna arrays, the radiation lobe width can be adjusted, and the gain can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings: Figure 1 is a schematic diagram of the structure of a multi-array base station antenna according to an embodiment of the present application; Figure 2 is a schematic diagram of the side wall structure of an embodiment of the present application; Figure 3 A top view of a multi-array base station antenna according to an embodiment of the present application; Figure 4 A bottom view of a multi-array base station antenna according to an embodiment of the present application; Figure 5 This is a top view of the low-frequency vibrator according to an embodiment of the present application.

[0017] Description of reference numerals: 101-reflection plate; 102-low frequency oscillator; 103-side wall; 1031-side wall plate; 1032-support plate; 1033-groove; 1034-fixing part; 104-port; 201-bridge; 202-power dividing plate; 203-phase shifter; 301-air avoidance area; 302-fixing hole; 303-sword angle; 304-through hole area; 305-routing; 306-feeding plate. DETAILED DESCRIPTION

[0018] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0019] It should be understood that the various steps described in the method implementation of the present application can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0020] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0021] It should be noted that the modifications of "one" and "plurality" mentioned in this application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more". "Plurality" should be understood as two or more.

[0022] Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] The present application provides a multi-array base station antenna, including: A reflector plate, wherein a plurality of low-frequency antenna arrays are arranged on the front side of the reflector plate; The low-frequency antenna array includes a plurality of low-frequency oscillators; Multiple low-frequency antenna arrays are arranged in parallel; A side wall is provided between adjacent low frequency antenna arrays; The extension direction of the side wall is consistent with the extension direction of the reflector; The side wall is composed of a plurality of side wall panels, and gaps are provided between adjacent side wall panels; The extending direction of the side wall plate is consistent with the extending direction of the reflector plate; The length of the side wall plate is equal to half of the wavelength of the working frequency of the low-frequency oscillator.

[0024] Example 1 Figure 1 is a schematic diagram of a multi-array base station antenna structure according to an embodiment of the present application, Figure 2 is a schematic diagram of the side wall structure of an embodiment of the present application, Figure 3 This is a top view of a multi-array base station antenna according to an embodiment of the present application. Figure 4 This is a bottom view of a multi-array base station antenna according to an embodiment of the present application. Figure 5 This is a top view of the low-frequency vibrator of the embodiment of the present application. Figure 1-5 , the multi-array base station antenna structure of the embodiment of the present application is described in detail.

[0025] In an exemplary implementation, the multi-array base station antenna of the embodiment of the present application includes: a reflector 101 .

[0026] In an exemplary embodiment, the reflective plate 101 is, for example, a metal reflective plate.

[0027] In an exemplary embodiment, a plurality of low-frequency antenna arrays are provided on the front side of the reflector 101. For the sake of convenience of explanation, two low-frequency antenna arrays are taken as an example. Figure 1 shown.

[0028] In an exemplary embodiment, as needed, the reflector 101 may also include a non-low-frequency antenna array. When a non-low-frequency antenna array is included, no non-low-frequency antenna array is provided between adjacent low-frequency antenna arrays.

[0029] In an exemplary implementation, each low-frequency antenna array is composed of, for example, a row of low-frequency elements 102 , and a row of low-frequency elements includes a plurality of low-frequency elements 102 .

[0030] In an exemplary embodiment, the operating frequency of the low frequency oscillator 102 is 698 MHz-960 MHz.

[0031] In an exemplary embodiment, a plurality of low-frequency antenna arrays are arranged in parallel, and as required, the spacings between the dipoles on adjacent low-frequency antenna arrays may be the same.

[0032] In an exemplary embodiment, a side wall 103 is provided between adjacent low frequency antenna arrays.

[0033] In an exemplary embodiment, the extension direction of the low-frequency antenna array is consistent with the extension direction of the reflector 101. Figure 1 and Figure 3 As shown, when the reflector 101 is rectangular as a whole, the extension direction of the low-frequency antenna array is along the long side of the reflector 101 , and at this time, the extension direction of the side wall 103 is also consistent with the extension direction of the low-frequency antenna array.

[0034] In an exemplary embodiment, the low-frequency antenna arrays are symmetrically distributed on both sides of the side wall 103 .

[0035] In an exemplary embodiment, the side wall 103 is made of a metal material, for example, the side wall 103 is made of an aluminum alloy material.

[0036] In an exemplary embodiment, the side wall 103 is composed of a plurality of side wall panels 1031 , gaps are provided between adjacent side wall panels 1031 , and the side wall panels 1031 are not directly connected to each other.

[0037] In an exemplary embodiment, the gap between adjacent side wall panels 1031 on the side wall 103 is 5-10 mm.

[0038] In an exemplary embodiment, gaps are provided between adjacent side wall panels 1031, that is, the side walls 103 are discontinuously connected, which can reduce the antenna 3db lobe width and the resonance at the same time.

[0039] In an exemplary embodiment, the extending direction of the side wall plate 1031 is consistent with the extending direction of the reflective plate 101 .

[0040] In an exemplary embodiment, the length of the side wall plate 1031 is equal to half of the wavelength of the operating frequency of the low-frequency oscillator 102 .

[0041] In an exemplary embodiment, a support plate 1032 is provided in the middle of the side wall plate 1031, one end of the support plate 1032 is connected to the center of the side wall plate 1031, and the other end is connected to the reflective plate 101. Figure 2 shown.

[0042] In an exemplary embodiment, the support plate 1032 fixes the side wall plate 1031 to the reflective plate 101 through the fixing portion 1034. Figure 2 shown.

[0043] In an exemplary embodiment, the center point of the support plate 1032 is located at the center point of the line connecting the support bases of the low-frequency oscillators 102 between adjacent low-frequency antenna arrays. Figure 1 and Figure 3 shown.

[0044] In an exemplary embodiment, a groove 1033 is provided at one end of the support plate 1032 connected to the side wall plate 1031 , or in other words, a groove 1033 is provided at one end of the support plate 1032 away from the reflective plate 101 .

[0045] In an exemplary embodiment, the groove 1033 extends in a direction away from the reflector 101 and penetrates the side wall 1031, that is, the depth of the groove 1033 is greater than the width of the side wall 1031. Figure 2 shown.

[0046] In an exemplary embodiment, as required, the sidewall 103 may be made of metal, that is, the sidewall 103 is a metal sidewall.

[0047] In an exemplary embodiment, the side wall 103 is vertically arranged on the reflective plate 101 as needed.

[0048] In an exemplary embodiment, a bridge 201 is provided on the back side of the reflective plate 101 .

[0049] In an exemplary embodiment, the bridge 201 includes two input ports and two output ports.

[0050] In an exemplary embodiment, the phase difference between the two input ports of the bridge 201 is 90°, which can reduce the mutual influence between the outputs.

[0051] In an exemplary embodiment, the output phases of the two output ports of the bridge 201 are the same, that is, the phase difference between the two output ports is 0°. This design ensures that the phase difference between the shared low-frequency oscillators 102 is constant.

[0052] In an exemplary embodiment, the bridge 201 internally adopts a coupling design.

[0053] In an exemplary embodiment, a power splitter 202 and a phase shifter 203 are further disposed on the back of the reflector 101 .

[0054] In an exemplary embodiment, the number of power dividing boards 202 is equal to the number of low frequency oscillators 102 minus the number of shared low frequency oscillators 102 .

[0055] In an exemplary embodiment, adjacent low-frequency elements 102 between adjacent low-frequency antenna arrays share a power splitter board 202 .

[0056] In an exemplary embodiment, the low-frequency oscillator 102 has two interfaces, one is positively polarized and the other is negatively polarized; two low-frequency oscillators 102 are equivalent to having four interfaces, the two positively polarized interfaces are connected to the same positively polarized power splitter board 202, and the two negatively polarized interfaces are connected to the same negatively polarized power splitter board 202.

[0057] In an exemplary embodiment, a port 104 is provided on the back side of the reflective plate 101 at one end away from the bridge 201 .

[0058] In an exemplary embodiment, the port 104 includes a plurality of ports.

[0059] In an exemplary embodiment, for example, the bus of port 104 is connected to the bus of phase shifter 203, and the bus of phase shifter 203 is one-out-five; the one-out-five bus of phase shifter 203 means that the outlet end of phase shifter 203 is divided into 5 outlet connections; four of the outlet connections of phase shifter 203 are respectively connected to four power division boards 202, and each power division board 202 has two outlets, and the same polarization of two adjacent low-frequency oscillators 102 is connected to the same outlet of the power division board 202.

[0060] In an exemplary embodiment, when a bridge 201 is provided, the two low-frequency oscillator arrays respectively have two phase shifters 203, and the phase shifters 203 corresponding to the same polarization of the two low-frequency oscillator arrays are respectively connected to the two input ports of the bridge 201, and the two output ports of the bridge 201 respectively correspond to the same polarization of two low-frequency oscillators 102 supplied; or it can be understood that the negatively polarized phase shifter 203 is connected to the negative polarization of the low-frequency oscillator 102, and the positive polarization of the phase shifter 203 is connected to the positive polarization of the low-frequency oscillator 102.

[0061] In an exemplary embodiment, the low-frequency vibrator 102 is rectangular, and the upper surface of the low-frequency vibrator 102 is square as a whole.

[0062] In an exemplary embodiment, the diagonal length of the upper surface of the low-frequency oscillator 102 is half of the wavelength of the operating frequency of the low-frequency oscillator 102 .

[0063] In an exemplary embodiment, a feeding plate placement area is provided in the middle area of ​​the upper surface of the low-frequency oscillator 102 , and the feeding plate placement area is used to place the feeding plate 306 ; the feeding plate placement area can be understood as a feeding point.

[0064] In an exemplary embodiment, through-hole areas 304 are provided on both sides of the midline of the upper surface of the low-frequency oscillator 102, and the through-hole areas 304 are arranged away from the feeding plate placement area. Figure 5 shown.

[0065] In an exemplary embodiment, a sword angle 303 protruding in a direction away from the feeding plate 306 is provided at a corner of the upper surface of the low-frequency oscillator 102 .

[0066] In an exemplary embodiment, a clearance area 301 is further provided between adjacent through-hole areas 304 and the frame of the upper surface of the low-frequency oscillator 102 .

[0067] In an exemplary embodiment, the air avoidance area 301 may be designed to be square as required, such as Figure 5 shown.

[0068] In an exemplary embodiment, a fixing hole 302 for a support member to fix the low-frequency oscillator 102 may be further provided in the air avoidance area 301 ; that is, one end of the support member is connected to the fixing hole 302 , and the other end thereof is fixed to the reflective plate 101 .

[0069] In an exemplary embodiment, the routing line 305 on the upper surface of the low frequency oscillator 102 surrounds the through hole area 304 and goes along the edge of the clearance area 301 to the sword angle 303 ; it can be understood that the routing line 305 bypasses the through hole area 304 and the clearance area 301 .

[0070] In an exemplary embodiment, the through-hole region 304 is provided with a through-hole array, and the through-hole array is composed of a plurality of through-holes.

[0071] In an exemplary embodiment, the width dimension of the through hole array on one side of the midline is equal to half the width dimension of the feeding plate placement area. Figure 5 shown.

[0072] In an exemplary embodiment, the through-hole area 304, the avoidance area 301 and the sword angle 303 are designed to extend the path of the trace 305, thereby increasing the bandwidth of the low-frequency oscillator 102, improving the return loss performance, and reducing the resonance between low-frequency antennas.

[0073] In an exemplary embodiment, the diagonal traces 305 on the upper surface of the low frequency oscillator 102 are connected via a feeding plate 306 .

[0074] In an exemplary embodiment, the coaxial line is connected to the feeding plate 306 by means of an internal conductor, which reduces interference sources and improves transmission efficiency.

[0075] Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A multi-array base station antenna, characterized in that: include: A reflector, wherein a plurality of low-frequency antenna arrays are arranged on the front side of the reflector; The low-frequency antenna array includes a plurality of low-frequency oscillators; A plurality of the low-frequency antenna arrays are arranged in parallel; A side wall is provided between adjacent low-frequency antenna arrays; The extension direction of the side wall is consistent with the extension direction of the reflector; The side wall is composed of a plurality of side wall panels, and gaps are provided between adjacent side wall panels; The extending direction of the side wall plate is consistent with the extending direction of the reflector plate; The length of the side wall plate is equal to half of the wavelength of the working frequency of the low-frequency oscillator.

2. The multi-array base station antenna according to claim 1, characterized in that: A support plate is provided in the middle of the side wall plate, one end of the support plate is connected to the center of the side wall plate, and the other end is connected to the reflective plate; A groove is provided at one end of the support plate connected to the side wall plate, and the groove extends in a direction away from the reflection plate and penetrates the side wall plate.

3. The multi-array base station antenna according to claim 2, characterized in that: The low-frequency vibrator is fixed on the reflector through a support seat; The center point of the support plate is located on the center point of the line connecting the support bases of the low-frequency oscillators between the adjacent low-frequency antenna arrays.

4. The multi-array base station antenna according to claim 1, characterized in that: The gap between the side wall panels is 5-10 mm.

5. The multi-array base station antenna according to claim 1, characterized in that: An electric bridge is provided on the back of the reflecting plate; The electric bridge is arranged at the end of the reflecting plate; The phase difference between the input ports of the bridge is 90°; The phase difference between the output ports of the bridge is 0°.

6. The multi-array base station antenna according to claim 5, characterized in that: The back of the reflector is also provided with: a power splitter and a phase shifter; The number of the power dividing boards is equal to the number of the low-frequency oscillators minus the number of the shared low-frequency oscillators; The adjacent low-frequency oscillators between the low-frequency antenna arrays share one power splitter board; A port is provided on the back side of the reflection plate at one end away from the bridge.

7. The multi-array base station antenna according to claim 1, characterized in that: The low-frequency vibrator is rectangular; The diagonal length of the upper surface of the low-frequency vibrator is half of the wavelength of the working frequency of the low-frequency vibrator.

8. The multi-array base station antenna according to claim 7, characterized in that: A feeding plate placement area is provided in the middle area of ​​the upper surface of the low-frequency oscillator, and the feeding plate placement area is used to place the feeding plate; A through hole area is provided on both sides of the midline of the upper surface of the low-frequency vibrator, and the through hole area is arranged away from the feeding plate placement area; The corners of the upper surface of the low-frequency oscillator are provided with sword angles protruding in a direction away from the feeding plate; A clearance area is also provided between the adjacent through-hole area and the frame of the upper surface of the low-frequency vibrator; The wiring on the upper surface of the low-frequency oscillator surrounds the through-hole area and goes along the edge of the clearance area to the sword angle.

9. The multi-array base station antenna according to claim 8, characterized in that: The through hole area is provided with a through hole array; The width dimension of the through hole array on one side of the midline is equal to half the width dimension of the feeding plate placement area.

10. The multi-array base station antenna according to claim 9, characterized in that: The diagonal wirings on the upper surface of the low-frequency oscillator are connected through the feeding sheet.

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