A base station antenna boundary device and a base station antenna

Abstract

This invention relates to the field of communication technology and discloses a base station antenna boundary device and a base station antenna. The base station antenna includes a reflector and multiple rows of radiating elements. Each row of radiating elements includes multiple radiating elements arranged along a first direction. The boundary device includes a first isolation plate disposed on the reflector, positioned between two adjacent rows of radiating elements, extending along a second direction perpendicular to the first direction, and the position of the first isolation plate corresponds to that between two adjacent radiating elements in any row. This invention provides a base station antenna boundary device and base station antenna. By placing a first isolation plate between two adjacent rows of radiating elements, corresponding to the position between two adjacent radiating elements in any row, the isolation between adjacent rows of radiating elements can be improved, which is beneficial for improving antenna isolation and optimizing the antenna radiation pattern. This boundary structure is simple, effective, and suitable for low-frequency base station antennas.

Description

Technical Field

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

[0002] With the rapid development of mobile communication systems, network coverage in urban areas is largely complete, while the demand for network optimization and coverage quality in rural and suburban areas is increasing. Low-frequency base station antennas, as an important antenna type in special scenarios such as rural areas, suburbs, and mountainous regions, are also facing severe challenges. When designing network layouts for these scenarios, the communication coverage quality and coverage range of the antennas must be considered.

[0003] Low-frequency base station antennas, due to their low-frequency characteristics, long wavelengths, wide coverage, and strong diffraction capabilities, are suitable for use in rural, suburban, and mountainous areas. However, most existing low-frequency base station antennas have performance indicators such as isolation and radiation pattern that need to be optimized. These performance indicators remain key challenges that need to be overcome. Summary of the Invention

[0004] This invention provides a base station antenna boundary device and a base station antenna to solve the problem that most low-frequency base station antennas in the prior art have performance indicators such as isolation and radiation pattern that need to be optimized.

[0005] The present invention provides a base station antenna boundary device, wherein the base station antenna includes a reflector and multiple rows of radiating elements disposed on the reflector, each row of radiating elements includes multiple radiating elements arranged along a first direction, and the boundary device includes: a first isolation plate disposed on the reflector, the first isolation plate being disposed between two adjacent rows of radiating elements, the first isolation plate extending along a second direction, the second direction being perpendicular to the first direction, and the position of the first isolation plate corresponding to the position between two adjacent radiating elements in any row of radiating elements.

[0006] The base station antenna boundary device provided by the present invention further includes: a second isolation plate, the second isolation plate being disposed on the reflector and located between two adjacent rows of the radiating elements, the second isolation plate extending along the first direction, and the first isolation plate being disposed across the second isolation plate.

[0007] According to the base station antenna boundary device provided by the present invention, the first isolation plate is provided with a slot that penetrates the bottom edge, the second isolation plate is inserted and connected to the slot, and the bottom of the first isolation plate is connected to the reflector.

[0008] According to the base station antenna boundary device provided by the present invention, the second isolation plate has a slot at a position corresponding to the first isolation plate, and the second isolation plate is inserted and connected to the slot at the slot.

[0009] According to the base station antenna boundary device provided by the present invention, there are gaps between the two sides of the slot and the first isolation plate, and there is a gap between the bottom of the slot and the bottom of the slot.

[0010] According to the base station antenna boundary device provided by the present invention, an opening is provided on the second isolation plate at the location corresponding to the radiating element.

[0011] According to the base station antenna boundary device provided by the present invention, in any column of the radiating elements, an isolation strip is provided between two adjacent radiating elements, the isolation strip extends along the second direction, and the isolation strip is supported and connected to the reflector.

[0012] According to the base station antenna boundary device provided by the present invention, the two ends of the isolation strip are respectively provided with downward bending sections.

[0013] According to the base station antenna boundary device provided by the present invention, the reflector is provided with side plates on both sides of the multiple rows of radiating elements, the side plates extend along the first direction, the top of the side plates is provided with a first groove corresponding to the radiating element, and the middle part of the bottom of the first groove is provided with a second groove.

[0014] The present invention also provides a base station antenna, including the base station antenna boundary device described in any of the above claims.

[0015] The present invention provides a base station antenna boundary device and a base station antenna. By setting a first isolation plate between two adjacent columns of radiating elements and at a position corresponding to the position between two adjacent radiating elements in any column, the isolation between two adjacent columns of radiating elements can be improved, which is beneficial to improving the antenna isolation and optimizing the antenna radiation pattern. The boundary structure is simple, easy to set up, and has good effect, and is suitable for low frequency base station antennas. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall setup of the base station antenna boundary device provided by the present invention;

[0018] Figure 2 This is a planar schematic diagram of the base station antenna boundary device provided by the present invention;

[0019] Figure 3This is a schematic diagram of the structure of the first isolation plate provided by the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the second isolation plate provided by the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the isolation strip provided by the present invention.

[0022] Figure label:

[0023] 1: Reflector; 101: Side plate; 1011: First groove; 1012: Second groove; 2: Radiation unit; 201: Vertical arm; 3: First isolation plate; 301: First connector; 302: Slot; 4: Second isolation plate; 401: Slot; 402: Opening; 403: Second connector; 5: Isolation strip; 501: Bent section; 6: Support column. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] The following is combined with Figures 1-5 The present invention describes a base station antenna boundary device and a base station antenna.

[0026] refer to Figure 1 This embodiment provides a base station antenna boundary device, wherein the base station antenna includes a reflector 1 and multiple rows of radiating elements 2 disposed on the reflector 1, and any row of radiating elements 2 includes multiple radiating elements 2 arranged along a first direction. The boundary device includes: a first isolation plate 3 disposed on the reflector 1, the first isolation plate 3 being disposed between two adjacent rows of radiating elements 2, the first isolation plate 3 extending along a second direction, the second direction being perpendicular to the first direction, and the position of the first isolation plate 3 corresponding to the position between two adjacent radiating elements 2 in any row of radiating elements 2.

[0027] In this embodiment, the first direction is the extension direction of any column of radiating elements 2. In this embodiment, a first isolation plate 3 is provided between two adjacent columns of radiating elements 2 and at a position corresponding to the position between two adjacent radiating elements 2 in any column; that is, the first isolation plate 3 is located between four radiating elements 2 in two adjacent columns of radiating elements 2. Furthermore, the first isolation plate 3 extends along a second direction perpendicular to the first direction. By providing the first isolation plate 3, the isolation between two adjacent columns of radiating elements 2 can be improved, which is beneficial for improving antenna isolation and optimizing the antenna pattern.

[0028] This embodiment provides a base station antenna boundary device. By setting a first isolation plate 3 between two adjacent columns of radiating elements 2 and at the corresponding position between two adjacent radiating elements 2 in any column, the isolation between two adjacent columns of radiating elements 2 can be improved, which is beneficial to improving antenna isolation and optimizing antenna radiation pattern. The boundary structure is simple, easy to set, and has good effect, and is suitable for low frequency base station antennas.

[0029] Based on the above embodiments, further, referring to Figure 2 A base station antenna boundary device further includes: a second isolation plate 4, which is disposed on the reflector 1 and located between two adjacent rows of radiating elements 2, the second isolation plate 4 extending along the first direction, and the first isolation plate 3 being disposed across the second isolation plate 4.

[0030] In this embodiment, a second isolation plate 4 is provided between two adjacent columns of radiating elements 2. The second isolation plate can extend along the first direction and is erected between the two adjacent columns of radiating elements 2. Providing the second isolation plate 4 can further improve the isolation between the two adjacent columns of radiating elements 2, and also helps to improve the front-to-back ratio of the antenna and optimize the antenna radiation pattern. Specifically, the extension direction of the first isolation plate 3 is perpendicular to the extension direction of the second isolation plate 4, and the first isolation plate 3 can be installed across the second isolation plate 4. A gap is provided between the first isolation plate 3 and the second isolation plate 4, and the two are not in contact.

[0031] Furthermore, multiple first isolation plates 3 are provided along the extension direction of the second isolation plate 4. That is, for two adjacent columns of radiating elements 2, a first isolation plate 3 is provided at the corresponding position between two adjacent radiating elements 2 in any column of radiating elements 2, so as to ensure the improvement effect of antenna isolation.

[0032] Furthermore, the height of the second isolation plate 4 relative to the reflector 1 is 0.5-0.7 times the height of the radiating unit 2. The height of the second isolation plate 4 is the distance between the side of the second isolation plate 4 away from the reflector 1 and the surface of the reflector 1; the height of the radiating unit 2 is the distance between the side of the radiating unit 2 away from the reflector 1 and the surface of the reflector 1. Within this height range, the second isolation plate 4 has a good effect on improving the isolation degree, and its moderate height is conducive to reducing the interference effect with the radiating unit 2.

[0033] Based on the above embodiments, further, referring to Figure 3 The first isolation plate 3 is provided with a slot 302 that extends through the bottom edge, and the second isolation plate 4 is inserted into the slot 302. The bottom of the first isolation plate 3 is connected to the reflector plate 1.

[0034] In this embodiment, the bottom edge of the first isolation plate 3 is the side of the first isolation plate 3 closest to the reflector 1. The second isolation plate 4 is connected to the slot 302 on the first isolation plate 3 by insertion, meaning the second isolation plate 4 is inserted into the slot 302, allowing the first isolation plate 3 to span across the second isolation plate 4. Thus, the first isolation plate 3 is located in the middle of the four radiating elements 2, which helps to improve the antenna isolation.

[0035] Further, refer to Figure 3 The bottom of the first isolation plate 3 may be provided with a first connecting member 301, and the first isolation plate 3 is connected and fixed to the reflector plate 1 through the first connecting member 301. Specifically, the first connecting member 301 can be connected and fixed to the reflector plate 1 by plastic rivets. The first connecting member 301 and the first isolation plate 3 can be an integral structure. (Reference) Figure 1 and Figure 2 The bottom of the second isolation plate 4 may be provided with a second connector 403, and the second isolation plate 4 is connected and fixed to the reflector plate 1 through the second connector 403. Specifically, the second connector 403 can be connected and fixed to the reflector plate 1 by plastic rivets. The second connector 403 and the second isolation plate 4 can be an integral structure.

[0036] Furthermore, the first isolation plate 3 is insulated from the reflector 1; an insulating layer can be provided between the bottom of the first isolation plate 3 and the reflector 1, and between the bottom of the first connector 301 and the reflector 1, to achieve insulation between the first isolation plate 3 and the reflector 1. Similarly, the second isolation plate 4 is insulated from the reflector 1; an insulating layer can be provided between the bottom of the second isolation plate 4 and the reflector 1, and between the bottom of the second connector 403 and the reflector 1, to achieve insulation between the second isolation plate 4 and the reflector 1.

[0037] Based on the above embodiments, further, referring to Figure 1 and Figure 4The second isolation plate 4 has a slot 401 corresponding to the first isolation plate 3, and the second isolation plate 4 is inserted into the slot 302 at the slot 401. The slot 401 extends through the top edge of the second isolation plate 4, which is the side edge away from the reflector plate 1, making the second isolation plate 4 concave at the slot 401. Thus, the first isolation plate 3 spans across the slot 401 of the second isolation plate 4, which facilitates the installation of the first isolation plate 3.

[0038] Based on the above embodiments, further, a gap is provided between the two sides of the slot 401 and the first isolation plate 3, and a gap is provided between the bottom of the slot 401 and the bottom of the slot 302. The two sides of the slot 401 are the two sides of the slot 401 along the first direction. That is, the first isolation plate 3 spans the slot 401 on the second isolation plate 4, and there is no contact between the first isolation plate 3 and the second isolation plate 4. A certain gap should be left between the first isolation plate 3 and the two sides of the slot 401. Similarly, a certain gap should be left between the bottom of the slot 401 and the bottom of the slot 302, and between the two sides of the slot 302 and the second isolation plate 4, so as to avoid mutual interference between the first isolation plate 3 and the second isolation plate 4.

[0039] Specifically, the slots 401 are arranged in a one-to-one correspondence with the first isolation plates 3. The slots 401 are located at corresponding positions between two adjacent radiating units 2 in any column of radiating units 2. The width of the slot 401, i.e., the dimension of the slot 401 along the first direction, can be 30-50 mm; the depth of the slot 401, i.e., the dimension along the direction perpendicular to the reflector plate 1, can be 5-15 mm. This range of slot dimensions facilitates the setting of the first isolation plate 3 and ensures a moderate distance between the second isolation plate 4 and the first isolation plate 3, which is beneficial for guaranteeing the improved isolation effect.

[0040] Based on the above embodiment, the second isolation plate 4 is further provided with an opening 402 corresponding to the radiating element 2. The middle part of the opening 402 can correspond to the middle part of the radiating element 2, that is, the middle part of the opening 402 is located on the extension line of the axis of symmetry of the radiating element 2. Providing the opening 402 is beneficial to improving the front-to-back ratio of the antenna and optimizing the antenna radiation pattern.

[0041] Furthermore, the opening 402 is rectangular, and the length of the rectangular opening along the first direction is the same as the side length of the radiating surface of the radiating element 2; the width of the rectangular opening is 0.2-0.4 times its length. The width of the rectangular opening is the dimension of the rectangular opening in the height direction of the second isolation plate 4. The opening 402 within this size range has a good effect on improving the front-to-back ratio of the antenna. Furthermore, the opening 402 is located in the middle part of the second isolation plate 4 in the height direction.

[0042] Based on the above embodiments, further, referring to Figure 1 In any column of the radiating elements 2, an isolation strip 5 is provided between two adjacent radiating elements 2. The isolation strip 5 extends along the second direction and is supported and connected to the reflector 1. The function of setting the isolation strip 5 is to reduce the coupling between different polarizations of two adjacent radiating elements 2 in the same column, and also to optimize the standing wave, thereby improving the isolation and cross-polarization between different polarizations of the radiating elements 2 in the same column of the antenna, and optimizing the antenna radiation pattern.

[0043] Furthermore, there is a gap between the isolation strip 5 and the reflector 1, and the height of the isolation strip 5 from the reflector 1 is less than the height of the radiating surface of the radiating unit 2 from the reflector 1. That is, the isolation strip 5 is located below the radiating surface of the radiating unit 2, which helps to ensure the improved isolation between radiating units 2 in the same row. Specifically, refer to... Figure 1 When a vertical arm 201 is connected downwards to the radiating surface of the radiating unit 2, the height of the isolation strip 5 relative to the reflector 1 is less than the height of the vertical arm 201 relative to the reflector 1. That is, the isolation strip 5 is lower than the vertical arm 201. The height of the isolation strip 5 relative to the reflector 1 can be 30-50mm.

[0044] Based on the above embodiments, further, referring to Figure 5 The isolation strip 5 has downward-bent sections 501 at both ends. The bending sections 501 can be perpendicular to the isolation strip 5. The bending sections 501 help to improve the isolation of the co-row radiation units 2.

[0045] Furthermore, the isolation strip 5 can be supported and connected to the reflector 1 by a support column 6. The support column 6 can be a plastic support column, so that the isolation strip 5 and the reflector 1 are insulated from each other.

[0046] Based on the above embodiments, the reflector 1 further comprises side plates 101 on both sides of the plurality of radiating units 2. The side plates 101 extend along the first direction, and a first groove 1011 is provided at the top of the side plate 101 corresponding to the radiating unit 2. A second groove 1012 is provided at the middle part of the bottom of the first groove 1011. The middle part of the first groove 1011 may correspond to the middle part of the radiating unit 2, that is, the middle part of the first groove 1011 is located on the extension line of the axis of symmetry of the radiating unit 2. The second groove 1012 is located at the middle part of the first groove 1011.

[0047] Reference Figure 1In this embodiment, a first groove 1011 is first provided at the corresponding position of the side plate 101 and the radiating unit 2. The first groove 1011 penetrates the top edge of the side, i.e., the side away from the reflector 1, so that the top edge of the side is concave at the first groove 1011. Further, a second groove 1012 is provided on the bottom of the first groove 1011. The second groove 1012 penetrates the bottom of the first groove 1011, so that the bottom of the first groove 1011 is concave at the second groove 1012. In this embodiment, by providing the first groove 1011 on the side plate 101, it is beneficial to improve the antenna isolation and front-to-back ratio. Furthermore, by providing the second groove 1012 on the bottom of the first groove 1011, it is beneficial to further improve the antenna isolation and front-to-back ratio.

[0048] Furthermore, the length of the first groove 1011 along the first direction is 40-80mm; the depth of the first groove 1011 is 10-30mm. The length of the second groove 1012 along the first direction is half the length of the first groove 1011; the depth of the second groove 1012 is the same as the depth of the first groove 1011. The depths of the first groove 1011 and the second groove 1012 are their dimensions in the direction perpendicular to the reflector 1. The first groove 1011 and the second groove 1012 with these dimensions provide a good improvement in antenna isolation and front-to-back ratio.

[0049] Based on the above embodiments, this embodiment further provides a base station antenna, which includes the base station antenna boundary device described in any of the above embodiments. The base station antenna also includes a reflector 1 and multiple rows of radiating elements 2 disposed on the reflector 1, each row of radiating elements 2 including multiple radiating elements 2 arranged along a first direction.

[0050] Building upon the above embodiments, this embodiment further addresses the challenges of antenna deployment in rural, suburban, and mountainous environments where high requirements exist for antenna coverage and diffraction capability. In low-frequency bands, isolation and front-to-back ratios are often unsatisfactory, making improvements difficult. This embodiment provides a boundary device for a low-frequency base station antenna, comprising a reflector 1 and two rows of radiating elements 2 spaced apart on the front of the reflector 1. The reflector 1 is a metal plate, and the radiating elements 2 are low-frequency vibrators operating at frequencies between 703 and 960 MHz. Two vertical side plates 101 are formed by folding the reflector 1's sides towards its front.

[0051] A first groove 1011 is formed on the side plate 101 at the center position directly opposite the radiating element 2. The length of the first groove 1011 is 40-80mm, and the depth is 10-30mm. A second groove 1012 is formed in the middle of the first groove 1011. The length of the second groove 1012 is 0.5 times the length of the first groove 1011, and the depth of the second groove 1012 is the same as the groove depth. The function of the first groove 1011 and the second groove 1012 is to improve the isolation and front-to-back ratio of the low-frequency antenna.

[0052] An isolation strip 5 is provided at the midpoint between adjacent radiating elements 2 in any column. Both ends of the isolation strip 5 are vertically folded towards the reflector 1 to form bent sections 501. The purpose of the isolation strip 5 is to reduce the coupling between different polarizations of two adjacent radiating elements 2 in the same column, and to optimize the standing wave ratio, thereby improving the isolation and cross-polarization between different polarizations of the radiating elements 2 in the same column, and optimizing the antenna pattern. A hole can be made in the middle of the isolation strip 5 so that a plastic support column 6 can pass through the hole to fix the isolation strip 5 to the front of the reflector 1. The height of the isolation strip 5 is 30-50mm. The length of the isolation strip 5 is the same as the center wavelength of the radiating element 2. In other embodiments, the connection structure between the isolation strip 5 and the support column 6 can also be other, as long as the isolation strip 5 is supported and fixed on the reflector 1; no specific limitation is made.

[0053] A second isolating plate 4 is placed between two adjacent rows of radiating elements 2. The height of the second isolating plate 4 is 0.5 to 0.7 times the height of the radiating element 2. A horizontal rectangular window (or rectangular opening) is formed on the second isolating plate 4 directly opposite the radiating element 2. The length of the horizontal rectangular window is the same as the side length of the radiating surface of the radiating element 2, and the width of the horizontal rectangular window is 0.2 to 0.4 times the length of the rectangular window. A slot 401 is formed between the two rectangular windows along the extension direction of the second isolating plate 4. The length of the slot 401 can be 30-50 mm, and the width can be 5-15 mm. Two second connectors 403 are provided at the bottom of the second isolating plate 4, and the second isolating plate 4 is fixed to the front of the reflector 1 using plastic rivets. The second isolating plate 4 helps to improve the front-to-back ratio of the antenna and the isolation between the two rows of radiating elements 2.

[0054] A first isolation plate 3 is placed in the middle of the slot 401 of the second isolation plate 4, passing through the slot 401 of the isolation plate. That is, one isolation plate is placed in the middle of every four radiating units 2, passing through the slot 401 of the second isolation plate 4. Two first connectors 301 are provided at the bottom of the isolation plate, and plastic rivets are used to fix the isolation plate to the front of the reflector 1. The first isolation plate 3 is connected and fixed to the reflector 1 on both sides of the second isolation plate 4. The first isolation plate 3 helps to improve the isolation between the two rows of radiating units 2.

[0055] The low-frequency base station antenna boundary device provided in this embodiment, by setting an isolation strip 5, an isolation plate, and a combined coupling device across the plate within the antenna array, and by setting the coupling device within the antenna array, the signal emitted by the radiating element 2 forms a coupled resonance with the coupling device. The reflected signal is superimposed on the original signal, which can narrow the water wave beamwidth and significantly improve the front-to-back ratio at a specific frequency. It can improve the isolation and front-to-back ratio under low-frequency conditions, use a simple array, eliminate the need for a bridge, save space, and optimize the isolation, front-to-back ratio, and VSWR indicators. Within the 703-960MHz frequency band, it can optimize the radiation pattern and isolation of the low-frequency base station antenna, improve the isolation, VSWR, and front-to-back ratio of the low-frequency base station antenna, optimize the antenna radiation pattern, increase the coverage of the low-frequency antenna, and improve communication quality.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A base station antenna boundary device, wherein the base station antenna includes a reflector and multiple rows of radiating elements disposed on the reflector, each row of radiating elements including a plurality of radiating elements arranged along a first direction, characterized in that, The boundary device includes: a first isolation plate and a second isolation plate disposed on the reflector plate; the first isolation plate is disposed between two adjacent columns of the radiating units; the first isolation plate extends along a second direction, which is perpendicular to the first direction; and the first isolation plate corresponds to the position between two adjacent radiating units in any column of the radiating units; the second isolation plate is located between two adjacent columns of the radiating units and extends along the first direction; and the first isolation plate is disposed across the second isolation plate. The first isolation plate has a slot that extends through its bottom edge, and the bottom of the first isolation plate is connected to the reflector plate; the second isolation plate has a slot corresponding to the first isolation plate, and the second isolation plate is inserted into the slot at the slot; there is a gap between the two sides of the slot and the first isolation plate, and there is a gap between the bottom of the slot and the bottom of the slot.

2. The base station antenna boundary device according to claim 1, characterized in that, The second isolation plate has an opening at the location corresponding to the radiation unit.

3. The base station antenna boundary device according to claim 1, characterized in that, In any column of the radiating units, an isolation strip is provided between two adjacent radiating units. The isolation strip extends along the second direction and is supported and connected to the reflector.

4. The base station antenna boundary device according to claim 3, characterized in that, The isolation strip has downward-bent sections at both ends.

5. The base station antenna boundary device according to claim 1, characterized in that, The reflector has side plates on both sides of the multiple rows of radiation units. The side plates extend along the first direction. The top of the side plate is provided with a first groove corresponding to the radiation unit. The middle part of the bottom of the first groove is provided with a second groove.

6. A base station antenna, characterized in that, The base station antenna boundary device includes any one of claims 1-5 above.

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