Array antenna

Abstract

The utility model provides an array antenna, which relates to the technical field of communication antennae and comprises a reflecting plate provided with a first opening; the plurality of oscillators are arranged on the reflecting plate in an array; the insulating sheet is arranged between two adjacent columns of vibrators, one end of the insulating sheet is fixedly connected to the reflecting plate, and the insulating sheet is provided with a second opening matched with the first opening; the partition plate is located on the insulation sheet, the partition plate comprises a bottom plate and a plurality of isolation columns connected to the bottom plate, the other end of the insulation sheet is fixedly connected with the partition plate, third open holes matched with the first open holes and the second open holes are formed in the bottom plate, and the isolation columns are located on the two sides of the third open holes. According to the array antenna, the mutual coupling influence of dense array formation can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of communication antenna technology, specifically to an array antenna. Background Technology

[0002] As wireless communication systems rapidly evolve towards higher capacity, more multifunctionality, and greater intelligence, antennas, constrained by limited rooftop resources, are also trending towards miniaturization, integration, and broadband. This means that a single base station antenna contains multiple channels and various standards. Due to the size limitations of antennas, strong interference occurs when radiating elements are close together. For example, when an antenna contains multiple rows of low-frequency radiating elements, severe scattering and reflection occur between low-frequency elements when two groups of elements are close together. This results in significant mutual coupling between the element modules, causing pattern distortion, poor consistency, and deteriorated isolation in each radio frequency channel, severely impacting the coverage and channel quality of the low-frequency array.

[0003] Existing technologies use partitions between oscillators to improve mutual coupling, but problems such as insufficient overall strength, dust accumulation, and poor axial cross-polarization still exist. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of array antennas in the prior art and to provide an array antenna that, by adding a metal structure between two vibrators, can reduce the mutual coupling effect of dense arrays and improve the radiation pattern characteristics and isolation of each radio frequency channel.

[0005] To achieve the above and other objectives, this utility model is implemented through the following technical solution: This utility model provides an array antenna, the array antenna comprising: a reflector, the reflector having a first opening;

[0006] Several oscillators are arranged in an array on the reflector;

[0007] An insulating sheet is disposed between two adjacent rows of oscillators, one end of which is fixed to the reflector plate, and a second opening matching the first opening is provided on the insulating sheet;

[0008] And a partition plate, located on the insulating sheet, the partition plate includes a base plate and a plurality of isolation posts connected to the base plate, the other end of the insulating sheet is fixed to the partition plate, the base plate is provided with a third opening that matches the first opening and the second opening, and the isolation posts are located on both sides of the third opening.

[0009] In one embodiment, the mounting height of the partition is less than the height of the vibrator.

[0010] In one embodiment, the cross-section of the isolation column is vase-shaped.

[0011] In one embodiment, the fastening is a riveting fastening or an adhesive fastening.

[0012] In one embodiment, the reflector has a first fixing hole on both sides of the first opening, the insulating sheet has a second fixing hole on both sides of the second opening, and the base plate has a third fixing hole on both sides of the isolation post.

[0013] In one embodiment, the array antenna includes a fastener passing through the first fixing hole, the second fixing hole, and the third fixing hole.

[0014] In one embodiment, the fastener is a plastic fastener.

[0015] In one embodiment, the insulating sheet is a polytetrafluoroethylene (PTFE) plastic insulating sheet.

[0016] In one embodiment, the distance between the outer end faces of adjacent isolation pillars is L1, and the width of the outer end face of the isolation pillar is L2, satisfying L1:L2=1:(2~3).

[0017] This invention provides an array antenna. Compared with the prior art, this invention has the following advantages: By setting spaced isolation columns on the partition, this invention can effectively reduce the problem of poor axial cross polarization of the antenna. By setting the first opening, the second opening and the third opening, dust can be separated from the antenna in time, which effectively improves the channel quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 The image shown is a partial cross-sectional view of the array antenna of this utility model.

[0020] Figure 2 The image shown is a top view of the array antenna partition of this utility model.

[0021] Figure 3 The diagram shows an array antenna structure in the prior art.

[0022] Figure 4 Displayed as Figure 3 Radiation pattern of the medium array antenna.

[0023] Figure 5 The diagram shown is the radiation pattern of the array antenna of this utility model.

[0024] Figure 6 Displayed as Figure 3 Cross-polarization performance diagram of the medium array antenna at different azimuth angles.

[0025] Figure 7 The diagram shows the cross-polarization performance of the array antenna of this utility model at different azimuth angles.

[0026] Figure 8 Displayed as Figure 3 A comparison diagram of the S-parameters of the array antenna of this utility model. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] like Figures 1 to 8 As shown, this utility model provides an array antenna, which can be a high-frequency array antenna suitable for high-speed, low-latency mobile communication. The frequency range of the high-frequency array antenna can be from 3MHz to 30MHz.

[0029] like Figure 1 As shown, the array antenna includes a reflector 1, which can be a rectangular structure and can be a metal reflector 1. A first opening 11 is provided on the reflector 1. The diameter of the first opening 11 can be 10-20 mm. First fixing holes 12 are provided on both sides of the first opening 11.

[0030] like Figure 1 As shown, the array antenna includes vibrators 2, which can be arranged in an array on the reflector 1. The array of vibrators 2 can be a linear array. The first opening 11 and the first fixing hole 12 are located between two adjacent rows of vibrators 2.

[0031] like Figure 1As shown, the array antenna may include an insulating sheet 3. One side of the insulating sheet 3 can be fixed to the reflector 1. Further, the insulating sheet 3 can be disposed between two linear arrays of vibrators 2, for example, in the middle of two adjacent vibrators 2. The insulating sheet 3 is provided with a second opening 31 that matches the first opening 11. The insulating sheet 3 is provided with a second fixing hole 32 that matches the first fixing hole 12. The second fixing hole 32 is opened on both sides of the second opening 31. The insulating sheet 3 can be made of polytetrafluoroethylene (PTFE), epoxy resin, nylon, etc., preferably polytetrafluoroethylene.

[0032] like Figure 1 As shown, the array antenna includes a partition 4, which is fixed on the insulating sheet 3. The partition 4 includes a base plate 41 and a plurality of isolation posts 42 perpendicularly connected to the base plate 41. A third opening 41b is provided on the base plate 41, which matches the first opening 11 and the second opening 31. Specifically, the other side of the insulating sheet 3 is fixedly connected to the partition 4.

[0033] like Figure 1 As shown, the insulating sheet 3 not only insulates the metal partition 4 and the reflector 1, but also enhances the overall mechanical strength of the array antenna.

[0034] like Figure 1 and Figure 2 As shown, the isolation posts 42 located at both ends of the base plate 41 are aligned with the two side ends of the base plate 41. The plurality of isolation posts 42 form the radiation boundary of the antenna on the base plate 41, which can effectively reduce the mutual coupling effect between the elements and improve poor polarization.

[0035] like Figure 1 As shown, the base plate 41 is provided with a third fixing hole 41a that matches the first fixing hole 12 and the second fixing hole 32. The third fixing hole 41a is located on both sides of the isolation column 42. The isolation column 42 can be vertically arranged in the middle of the base plate 41. Specifically, the cross section of the partition plate 4 in the vertical direction of the isolation column 42 can have an inverted T-shaped structure.

[0036] like Figure 1 and Figure 2 As shown, the isolation posts 42 can be disposed on both sides of the third opening 41b, and the partition plate 4 is integrally formed. The installation height of the partition plate 4 is lower than the height of the vibrator 2. The partition plate 4 can be a metal partition plate 4, and more specifically, it can be aluminum. The two opposite sides of any adjacent isolation posts 42 are curved surfaces, and the curved surfaces are coplanar with the peripheral wall of the third opening 41b. The thickness of the insulating sheet 3 is 0.5-1mm.

[0037] like Figure 1 and Figure 2 As shown, the cross-section of the isolation column 42 can be vase-shaped, and the isolation columns 42 are evenly spaced. Furthermore, the distance between the outer end faces of adjacent isolation columns 42 is L1, and the width of the outer end face of the isolation column 42 is L2, satisfying L1:L2=1:(2~3).

[0038] In one embodiment, the array antenna includes a fixing member (not shown in the figure), which may be a plastic rivet or a plastic screw, or more specifically, a plastic rivet. The fixing member can sequentially pass through the third fixing hole 41a, the second fixing hole 32, and the first fixing hole 12 to fix the partition plate 4 and the insulating sheet 3 onto the reflector plate 1.

[0039] In other embodiments, the partition 4 and the insulating sheet 3 can also be fixed to the reflector 1 by other means such as adhesive bonding.

[0040] The array antenna can be used with a vibrator to periodically clean the dust on the antenna. With the vibration, the dust can leave the array antenna through the third opening 41b, the second opening 31 and the first opening 11, preventing dust from accumulating between the isolation pillars 42 and affecting the antenna cross polarization.

[0041] like Figure 3 As shown, Figure 3 The diagram shows an array antenna with only the partition 100 provided, as is the case in the prior art.

[0042] In one embodiment, the array antenna of this invention may have the following characteristics: Figure 3 The oscillator distribution shown will Figure 3 The partition 100 in the middle is replaced with the radial boundary of this utility model. For example... Figure 1 As shown, in this embodiment, the reflector 1 has a thickness of 2mm, a length of 1400mm, and a width of 480mm. The vibrator 2 is a ±45-degree PCB vibrator. The array of vibrators 2 includes 6 columns, with 14 vibrators arranged in each column along the length of the reflector 1. L1 = 32mm, L2 = 80mm, the overall height of the partition 4 is 16mm, the height of the vibrator 2 is 35mm, and the thickness of the insulating sheet 3 is 0.2mm.

[0043] The array antenna in this embodiment and Figure 3 Only the array antenna of partition 100 was compared in performance, and the results are as follows: Figures 4 to 8 As shown.

[0044] Figure 5 and Figure 4As can be seen from the comparison, the array antenna of this invention has a smoother radiation pattern curve, indicating that the array antenna of this invention has a better coverage effect.

[0045] Figure 7 Compared to Figure 6 With a higher XPD value, the array antenna of this invention is expected to have better anti-interference capability and can effectively improve sector coverage.

[0046] Depend on Figure 8 As can be seen, the array antenna of this invention has low S-parameters and low interference, demonstrating better isolation.

[0047] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly set on another element or indirectly set on another element; when an element is referred to as being "connected to" another element, it can be directly connected to another element or indirectly connected to another element.

[0048] It should be understood that the terms "height," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An array antenna, characterized in that: The array antenna includes: A reflector, wherein a first opening is provided on the reflector; Several oscillators are arranged in an array on the reflector; An insulating sheet is disposed between two adjacent rows of oscillators, one end of which is fixed to the reflector plate, and a second opening matching the first opening is provided on the insulating sheet; And a partition plate, located on the insulating sheet, the partition plate includes a base plate and a plurality of isolation posts connected to the base plate, the other end of the insulating sheet is fixed to the partition plate, the base plate is provided with a third opening that matches the first opening and the second opening, and the isolation posts are located on both sides of the third opening.

2. The array antenna according to claim 1, characterized in that: The installation height of the partition is less than the height of the vibrator.

3. The array antenna according to claim 1, characterized in that: The cross-section of the isolation column is vase-shaped.

4. The array antenna according to claim 1, characterized in that: The fastening is either rivet fastening or adhesive fastening.

5. The array antenna according to claim 1, characterized in that: The reflector has a first fixing hole on both sides of the first opening, the insulating sheet has a second fixing hole on both sides of the second opening, and the base plate has a third fixing hole on both sides of the isolation column.

6. The array antenna according to claim 5, characterized in that: The array antenna includes a fixing member that passes through the first fixing hole, the second fixing hole, and the third fixing hole.

7. The array antenna according to claim 6, characterized in that: The fastener is a plastic fastener.

8. The array antenna according to claim 1, characterized in that: The insulating sheet is a polytetrafluoroethylene (PTFE) plastic insulating sheet.

9. The array antenna according to claim 1, characterized in that: The distance between the outer end faces of adjacent isolation columns is L1, and the width of the outer end face of the isolation column is L2, satisfying L1:L2=1:(2~3).

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