Array antenna
By adding metal isolation strips and partitions between the two oscillators of the array antenna to form an X-shaped structure, the problem of mutual coupling of array antennas in the prior art is solved, and the isolation and radiation performance of the antenna are improved.
Patent Information
- Application Number
- CN202422777154.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-14
AI Technical Summary
When existing array antennas reduce the mutual coupling between low-frequency unit oscillators, there is a problem that narrowband suppression effect is limited or increase loss.
Add metal isolation strips between the two vibrators of the array antenna, and combine the partition and support to form an X-shaped isolation structure to improve the isolation degree and directional pattern characteristics of the antenna.
It effectively reduces the mutual coupling effect of dense arrays, improves the isolation and radiation performance of the antenna, and improves the coverage effect.
Smart Images
Figure CN223309210U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of communication antennas, in particular to an array antenna. Background Art
[0002] In order to reduce the mutual coupling between low-frequency unit oscillators and improve radiation performance, there are currently two commonly used methods: (1) adding PCB isolation strips between low-frequency units and designing a filtering structure in them. The advantage is that it can effectively suppress the mutual coupling between units, reduce the impact on the low-frequency radiation pattern, and reduce the horizontal plane wave width. The disadvantage is that these branches are narrow-band structures and can only suppress certain frequency bands. (2) Adding a set of power ratio bridges to a pair of oscillators in parallel in two columns of low-frequency units. The advantage is that it can also effectively reduce the wave width of the low-frequency unit. The disadvantage is that the bridge will cause more loss in the antenna and increase the cost of cable length. Utility Model Content
[0003] The purpose of the present utility model is to overcome the defects of array antennas in the prior art and provide an array antenna that, by adding a metal isolation strip between two oscillators, can reduce the mutual coupling effect of dense arrays, enhance the directional pattern characteristics of each RF channel, and improve antenna isolation.
[0004] In order to achieve the above and other purposes, the present invention is implemented by including the following technical solutions: The present invention provides an array antenna, the array antenna comprising: a reflector, the reflector being provided with a first connection hole;
[0005] A plurality of vibrators, wherein the vibrator array is distributed on the reflector;
[0006] A partition plate is provided on the reflector and is located between two adjacent columns of vibrators;
[0007] an isolation bar disposed between two columns of vibrators and located above the partition, the isolation bar including isolation segments and connecting segments spaced apart, the isolation bar including a first isolation bar and a second isolation bar, the first isolation bar being located on the second isolation bar, the isolation bar including non-intersecting portions at both ends and an intersecting portion connecting the non-intersecting portions, the non-intersecting portions at both ends being disposed adjacent to the vibrators in the corresponding columns, and the isolation bar being provided with a second connecting hole;
[0008] and a supporting member, which passes through the second connecting hole and the first connecting hole to support the isolation bar above the partition.
[0009] In one embodiment, the height difference between the first isolation strip and the second isolation strip is 10 mm.
[0010] In one embodiment, the partition is bonded or riveted to the reflective plate.
[0011] In one embodiment, the vibrator includes two columns of vibrators, each column has 6 vibrators, and the vibrator is a bowl-shaped vibrator.
[0012] In one embodiment, the support member is made of plastic.
[0013] In one embodiment, the cross-sectional area of the isolation segment is larger than the cross-sectional area of the connecting segment.
[0014] In one embodiment, the cross section of the isolation segment is rectangular or parallelogram.
[0015] In one embodiment, the partition is a metal plate or a PCB board.
[0016] In one embodiment, the isolation bar is a metal isolation bar or a PCB isolation bar.
[0017] In one embodiment, the isolation strip is in an X shape.
[0018] This utility model provides an array antenna. Compared with the existing technology, this utility model has the following advantages: by providing both partitions and isolation strips between the oscillators, antenna isolation can be effectively improved. This reduces the impact of array density on the unit radiation pattern, thereby improving the radiation pattern of the low-frequency array oscillators and improving sector coverage. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0020] Figure 1 Shown is a schematic structural diagram of the array antenna of the present invention.
[0021] Figure 2 Display as Figure 1 A partial enlarged view of point A in the middle.
[0022] Figure 3 Shown is a side view of the array antenna of the present invention.
[0023] Figure 4 Shown is a schematic diagram of the array antenna structure in Example 1 of the present utility model.
[0024] Figure 5 Shown is the radiation pattern tested in Example 1 of the present utility model.
[0025] Figure 6Shown is the radiation pattern of the array antenna in the prior art.
[0026] Figure 7 Shown is a comparison chart of S parameters of Example 1 and the prior art array antenna test. DETAILED DESCRIPTION
[0027] In order to help those skilled in the art 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 embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.
[0028] like Figures 1 to 7 As shown, the present invention provides an array antenna, which may be a low-frequency array antenna, and the frequency range of the low-frequency array antenna may be between 30 kHz and 300 kHz.
[0029] like Figure 1 and Figure 2 As shown, the array antenna includes a reflector 1, which can be a rectangular structure, and can be a metal reflector 1. The edge of the reflector 1 is provided with a baffle 11, and a gap S is provided between the baffles 11. Furthermore, the top of the baffle 11 can also be provided with a plurality of protrusions 11a. The height of the baffle 11 is lower than the height of the vibrator 2. The reflector 1 can be provided with a first connection hole 12.
[0030] like Figure 1 As shown, the array antenna includes vibrators 2, and the vibrators 2 can be arranged in an array on the reflector 1. The array of the vibrators 2 can be a linear array, and further, for example, it can be a two-column linear array. The vibrators 2 can be bowl-shaped vibrators 2.
[0031] like Figure 1 As shown, the array antenna includes a partition 3, which is fixed on the reflector 1. The fixation can be bonding or riveting. The partition 3 can be set between two columns of vibrators 2. The installation height of the partition 3 is lower than the height of the vibrator 2. The partition 3 can be a PCB board or a metal plate, specifically an aluminum metal plate.
[0032] like Figure 1 and Figure 2As shown, the array antenna includes an isolation strip 4, which is arranged between two adjacent columns of vibrators 2 and located above the partition 3. The isolation strip 4 includes a first isolation strip 41 and a second isolation strip 42. The first isolation strip 41 is located above the second isolation strip 42, and the first isolation strip 41 and the second isolation strip 42 are not in contact with each other. The isolation strip 4 is generally X-shaped. The first isolation strip 41 and the second isolation strip 42 can have the same shape. Taking the first isolation strip 41 as an example, the first isolation strip 41 includes non-intersecting portions 411 at both ends and an intersecting portion 412 connected to the non-intersecting portion 411. The first isolation strip 41 includes isolation segments 41a and connecting segments 41b spaced apart. The cross-sectional area of the isolation segments 41a is larger than the cross-sectional area of the connecting segments 41b. This allows for a gap area to be left between adjacent isolation segments 41a to improve axial cross-polarization. The two ends of the connecting segments 41b can be connected at the middle position of the two end faces of the isolation segment 41a. Furthermore, the cross-sections of the isolation segments 41a and the connecting segments 41b at the intersecting portion 412 can be parallelograms. The cross-sections of the non-intersecting portions 411 of the isolation segments 41a and the connecting segments 41b can be rectangular, or even oblong. The non-intersecting portions 411 at both ends can be located close to the vibrators 2 of the corresponding columns.
[0033] like Figure 3 As shown, in some embodiments, the height difference between the first isolation bar 41 and the second isolation bar 42 is 10 mm. The installation height of the isolation bar 4 is smaller than the height of the vibrator 2.
[0034] like Figure 2 As shown, the isolation strip 4 is provided with a second connection hole 43 , and the second connection hole 43 can be provided on the non-intersection portion 411 , for example.
[0035] The array antenna may also include a support member (not shown in the figure), which can pass through the second connection hole 43 and the first connection hole 12 to support the isolation strip 4 above the reflector 1. The support member can be a plastic member, such as a plastic rivet, a plastic nut column, a plastic screw, etc.
[0036] like Figure 1 As shown, the isolation strip 4 can be made of a PCB material or a metal material, specifically aluminum metal.
[0037] Example 1:
[0038] In Example 1, the Figure 4In the array antenna shown, the reflector 1 is 1600 mm long, 470 mm wide, and 2 mm thick. The dipole 2 is a bowl-shaped dipole. Two rows of dipoles 2 are arranged on the reflector 1, each row containing six dipoles 2. The distance between each row of dipoles 2 is 300 mm, and the distance between dipoles 2 in the same row is 280 mm. The partition 3 is made of aluminum alloy, and the isolation strip 4 is made of aluminum alloy. The width of the connecting section 41b is 2 mm, the width of the isolation section 41a is 10 mm, the length of the intersection 412 is 210 mm, and the length of the non-intersection section 411 is 115 mm. The distance between the first isolation strip 41 and the second isolation strip 42 is 10 mm (height difference).
[0039] The performance of the array antenna obtained in Example 1 was compared with that of the array antenna with only a partition plate. The results are as follows: Figure 5-7 As shown. Figure 5 and Figure 6 It can be seen that the slope of the array antenna pattern curve is more gentle after adding the isolation strip, which shows that the coverage effect is better after adding the isolation strip. Figure 7 It can be seen that the array antenna with the isolation strip added has a low S parameter (green line), small interference, and shows better isolation.
[0040] In the description of the present invention, it should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0041] It should be understood that the terms "height", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0042] 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 being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.
[0043] Throughout this specification, reference to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative descriptions 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 any one or more embodiments or examples.
[0044] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.
[0045] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An array antenna, characterized in that: The array antenna comprises: A reflective plate, wherein a first connecting hole is provided on the reflective plate; A plurality of vibrators, wherein the vibrator array is distributed on the reflector; A partition plate is provided on the reflector and is located between two adjacent columns of vibrators; an isolation bar disposed between two columns of vibrators and located above the partition, the isolation bar including isolation segments and connecting segments spaced apart, the isolation bar including a first isolation bar and a second isolation bar, the first isolation bar being located on the second isolation bar, the isolation bar including non-intersecting portions at both ends and an intersecting portion connecting the non-intersecting portions, the non-intersecting portions at both ends being disposed adjacent to the vibrators in the corresponding columns, and the isolation bar being provided with a second connecting hole; and a supporting member, which passes through the second connecting hole and the first connecting hole to support the isolation bar above the partition.
2. The array antenna according to claim 1, wherein: The height difference between the first isolation strip and the second isolation strip is 10 mm.
3. The array antenna according to claim 1, wherein: The partition is bonded or riveted to the reflective plate.
4. The array antenna according to claim 1, wherein: The vibrator includes two columns of vibrators, each column has 6 vibrators, and the vibrator is a bowl-shaped vibrator.
5. The array antenna according to claim 1, wherein: The supporting member is made of plastic.
6. The array antenna according to claim 1, wherein: The cross-sectional area of the isolation segment is larger than the cross-sectional area of the connecting segment.
7. The array antenna according to claim 1, wherein: The cross section of the isolation segment is rectangular or parallelogram.
8. The array antenna according to claim 1, wherein: The partition is a metal plate or a PCB board.
9. The array antenna according to claim 1, wherein: The isolation strip is a metal isolation strip or a PCB isolation strip.
10. The array antenna according to claim 1, wherein: The isolation strip is in an X shape.