Miniaturized 5G antenna

Abstract

The invention provides a miniaturized 5G antenna, which comprises a reflecting plate, and a plurality of first dual-polarized low-frequency radiation units and a plurality of second dual-polarized low-frequency radiation units which are arranged on the reflecting plate, the plurality of first dual-polarized low-frequency radiation units are arranged on the reflecting plate along a first square array, and the plurality of second dual-polarized low-frequency radiation units are arranged on the reflecting plate along a second square array. The plurality of second dual-polarization low-frequency radiation units are arranged on the reflecting plate along a second square array, the first square array is located in the second square array, and the second square array is arranged at an angle of 45 degrees relative to the first square array; each of the first dual-polarization low-frequency radiation unit and the second dual-polarization low-frequency radiation unit comprises a square metal radiator structure located above the reflecting plate, and four corners of each metal radiator structure are chamfered. The miniaturized 5G antenna is small in size, light in weight and more balanced in wave beam, the production efficiency is improved, the mutual coupling influence between the radiation units is reduced, and the miniaturized 5G antenna is more suitable for regional communication and has excellent capacity of suppressing adjacent region interference.

Description

Technical Field

[0001] The present invention relates to the field of 5G communication technology, and in particular to a miniaturized 5G antenna. Background Art

[0002] With the development of mobile 5G technology and the signal coverage of macro stations, the demand for 700MHz network coverage in some special scenarios is increasing. For example, in densely populated communication hotspots such as large squares and large sports venues, the conventional mobile communication network cannot meet the explosive growth of data traffic demand due to the different radiation scenarios. In order for the signal emitted by the antenna to better cover the entire venue, it is often necessary to divide a large area into multiple small square areas for partitioning and placement of antennas in each small square area to form accurate and comprehensive signal coverage.

[0003] In order to reduce interference when adjacent partitions are covered, the antennas used in the small square area must have high-quality shaping characteristics in three-dimensional space. This requires that the main beam waveform of the antenna is square in the direction of the main coverage cross section, and that the main beam of the antenna can fall quickly outside the half-power angle. The technical design of existing rectangular shaped antennas is relatively complex, with a large number of antenna units, generally more than 12 units. In a limited space, the volume is too large, which is not only costly, takes up space, affects the appearance, but also poses a safety hazard due to excessive weight. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a miniaturized 5G antenna, aiming to solve the technical problems mentioned in the background technology.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] A miniaturized 5G antenna comprises a reflector, and a plurality of first dual-polarization low-frequency radiating units and a plurality of second dual-polarization low-frequency radiating units arranged on the reflector, wherein the plurality of first dual-polarization low-frequency radiating units are arranged along a first square array on the reflector, and the plurality of second dual-polarization low-frequency radiating units are arranged along a second square array on the reflector, the first square array is located inside the second square array, and the second square array is arranged at an angle of 45° relative to the first square array, and the first dual-polarization low-frequency radiating unit and the second dual-polarization low-frequency radiating unit both comprise a metal radiator structure located above the reflector and arranged in a square shape, and the four corners of the metal radiator structure are chamfered.

[0007] According to one aspect of the above technical solution, there are four first dual-polarized low-frequency radiating units, and the four first dual-polarized low-frequency radiating units are respectively arranged at four corners of the first square array.

[0008] According to one aspect of the above technical solution, there are four second dual-polarized low-frequency radiation units, and the four second dual-polarized low-frequency radiation units are respectively arranged at the four corners of the second square array, and the distance from each second dual-polarized low-frequency radiation unit to the first square array is the same.

[0009] According to one aspect of the above technical solution, the reflector is square, and the center of the first square array coincides with the center of the reflector.

[0010] According to one aspect of the above technical solution, the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit further include a coaxial cable passing through the reflector and a metal feeding sheet arranged on the metal radiator structure.

[0011] According to one aspect of the above technical solution, the metal radiator structure includes a balun and a radiation surface. The radiation surface is composed of four radiation sub-surfaces, and the four radiation sub-surfaces are arranged in a "field" shape. The height of the balun is 0.15λ to 0.35λ, and the corners of each radiation sub-surface far from the center of the radiation surface are chamfered.

[0012] According to one aspect of the above technical solution, the metal feeding sheet is located above the center of the radiation surface, and the metal feeding sheet is arranged in an "X" shape.

[0013] According to one aspect of the above technical solution, the spacing range between the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit is 0.35λ to 0.6λ.

[0014] According to one aspect of the above technical solution, the feeding amplitude ratio between the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit is (20 - 50):1, and the feeding phase difference between the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit is 120° to 180°.

[0015] According to one aspect of the above technical solution, the operating frequency band range of the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit is 690 MHz to 960 MHz.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] By setting a plurality of first dual-polarization low-frequency radiating units in a first square array and a plurality of second dual-polarization low-frequency radiating units in a second square array, wherein the first square array is located inside the second square array, and the second square array is arranged at a 45° angle relative to the first square array, this design structure can provide conditions for shaping the antenna signal into a square beam, and since the dual-polarization low-frequency radiating units are all arranged in a square shape, the number of dual-polarization low-frequency radiating units used is also smaller, so that the miniaturized 5G antenna has a small size, light weight, and a more balanced beam, and lower cost, which improves production efficiency, makes the structure simpler, more beautiful, and easy to use and maintain; the metal radiator structures on the first dual-polarization low-frequency radiating unit and the second dual-polarization low-frequency radiating unit are both chamfered, and have strong sidelobe suppression capability, which can effectively reduce mutual influences such as mutual coupling between the dual-polarization low-frequency radiating units when coordinated with the first dual-polarization low-frequency radiating unit in the first square array and the second dual-polarization low-frequency radiating unit in the second square array, so that the miniaturized 5G antenna is more suitable for regional communication and has excellent ability to suppress interference in neighboring areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a miniaturized 5G antenna in the first embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the layout of the array feed amplitude ratio in a miniaturized 5G antenna;

[0020] Figure 3 A schematic diagram of the array phase layout in a miniaturized 5G antenna;

[0021] Figure 4 for Figure 1 A plan schematic diagram of the first dual-polarized low-frequency radiating unit or the second dual-polarized low-frequency radiating unit;

[0022] Figure 5 for Figure 1 A schematic elevation diagram of the first dual-polarized low-frequency radiating unit or the second dual-polarized low-frequency radiating unit;

[0023] Figure 6 Directional pattern for miniaturized 5G antennas;

[0024] Figure 7 A 3D image of a miniaturized 5G antenna;

[0025] Description of main component symbols:

[0026] Reflector 10 The first dual-polarized low-frequency radiating unit 20 The second dual-polarized low-frequency radiating unit 30 First Square Array 40 Second square array 50 Metal radiator structure 60 Radiating subsurface 61 Chamfer 62 Metal feed plate 63 Coaxial Cable 64

[0027] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] See also Figures 1 to 7 , shown is a miniaturized 5G antenna in the first embodiment of the present invention, including a reflector 10, and a plurality of first dual-polarization low-frequency radiating units 20 and a plurality of second dual-polarization low-frequency radiating units 30 arranged on the reflector 10, wherein the plurality of first dual-polarization low-frequency radiating units 20 are arranged along a first square array 40 on the reflector 10, and the plurality of second dual-polarization low-frequency radiating units 30 are arranged along a second square array 50 on the reflector 10, the first square array 40 is located inside the second square array 50, and the second square array 50 is arranged at an angle of 45° relative to the first square array 40, and the first dual-polarization low-frequency radiating unit 20 and the second dual-polarization low-frequency radiating unit 30 both include a metal radiator structure 60 located above the reflector 10 and arranged in a square shape, and the four corners of the metal radiator structure 60 are arranged with chamfers 62.

[0032] It can be understood that in the present invention, a plurality of first dual-polarized low-frequency radiation units 20 arranged in a first square array 40 and a plurality of second dual-polarized low-frequency radiation units 30 arranged in a second square array 50 are provided. The first square array 40 is located inside the second square array 50, and the second square array 50 is arranged at a 45° angle relative to the first square array 40. Such a design structure provides conditions for shaping the antenna signal into a square beam. Moreover, since the dual-polarized low-frequency radiation units are all square-shaped, the number of dual-polarized low-frequency radiation units used is less, making the volume of this miniaturized 5G antenna small, the weight light, the beam more balanced, the cost lower, improving the production efficiency, making the structure simpler, more beautiful, convenient to use and easy to maintain; the metal radiation body structures 60 on the first dual-polarized low-frequency radiation units 20 and the second dual-polarized low-frequency radiation units 30 are all provided with chamfers 62, having strong side lobe suppression ability. Cooperating with the first dual-polarized low-frequency radiation units 20 in the first square array 40 and the second dual-polarized low-frequency radiation units 30 in the second square array 50, it can effectively reduce the mutual influence such as mutual coupling between the dual-polarized low-frequency radiation units, making this miniaturized 5G antenna more suitable for regional communication and having excellent ability to suppress adjacent cell interference.

[0033] Specifically, in this embodiment, the operating frequency band range of the first dual-polarized low-frequency radiation unit 20 and the second dual-polarized low-frequency radiation unit 30 is 690 MHz to 960 MHz; the first dual-polarized low-frequency radiation unit 20 and the second dual-polarized low-frequency radiation unit 30 further include a coaxial line 64 penetrating through the reflector 10 and a metal feeding sheet 63 arranged on the metal radiation body structure 60; the metal radiation body structure 60 includes a balun and a radiation surface, the radiation surface is composed of four radiation sub-surfaces 61, the four radiation sub-surfaces 61 are arranged in a "field" shape, the height of the balun is 0.15λ to 0.35λ, and the corners of each radiation sub-surface 61 far from the center of the radiation surface are all provided with chamfers 62.

[0034] It should be noted that the structures of the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit are the same.

[0035] It can be understood that the upper part of the metal radiator structure 60 is the radiation surface, and the lower part is the balun. It is made by die-casting aluminum in one piece, with the characteristics of simple assembly and firm structure. The height of the balun is 0.15λ to 0.35λ, where λ is the wavelength of the operating center frequency of the first dual-polarized low-frequency radiation unit 20 and the second dual-polarized low-frequency radiation unit 30; the radiation surface is composed of four radiation sub-surfaces 61, and the four radiation sub-surfaces 61 are arranged in a "field" shape, which can better form a directional beam. In a shaped antenna, the distance between the dual-polarized low-frequency radiation units is very close, and the performance requirements of different shaped antennas are different, and the placement positions of the dual-polarized low-frequency radiation units are uncertain. In order to be more suitable for the array of shaped antennas, chamfers 62 are made at the four corners (i.e., the corners of the radiation sub-surface 61 far from the center of the radiation surface) of the first dual-polarized low-frequency radiation unit 20 and the second dual-polarized low-frequency radiation unit 30, which can effectively reduce the mutual coupling and other mutual influences between the dual-polarized low-frequency radiation units.

[0036] Furthermore, the metal feeding sheet 63 is located above the center of the radiation surface, and the metal feeding sheet 63 is arranged in an "X" shape.

[0037] It can be understood that the metal feeding sheet 63 is arranged at an angle of 45° with respect to the radiation surface, forming an "X" structure, which can form ±45° polarization of the dual-polarized low-frequency radiation unit.

[0038] Furthermore, there are four first dual-polarized low-frequency radiation units 20, and the four first dual-polarized low-frequency radiation units 20 are respectively arranged at the four corners of the first square array 40; there are four second dual-polarized low-frequency radiation units 30, and the four second dual-polarized low-frequency radiation units 30 are respectively arranged at the four corners of the second square array 50, and the distance from each second dual-polarized low-frequency radiation unit 30 to the first square array 40 is the same; the reflector 10 is arranged in a square shape, and the center of the first square array 40 coincides with the center of the reflector 10.

[0039] It can be understood that the above settings make the first square array 40 and the second square array 50 themselves arranged in an axisymmetric plane, and after the first square array 40 and the second square array 50 are combined, they are also arranged in an axisymmetric plane. Furthermore, the miniaturized 5G antenna has a small volume and light weight, making it easier for the miniaturized 5G antenna to form a directional beam, the beam is more balanced, more suitable for regional communication, and has excellent ability to suppress adjacent cell interference.

[0040] Furthermore, the spacing range between the first dual-polarization low-frequency radiating unit 20 and the second dual-polarization low-frequency radiating unit 30 is 0.35λ~0.6λ; the feeding amplitude ratio between the first dual-polarization low-frequency radiating unit 20 and the second dual-polarization low-frequency radiating unit 30 is (20~50):1, and the feeding phase difference between the first dual-polarization low-frequency radiating unit 20 and the second dual-polarization low-frequency radiating unit 30 is 120°~180°.

[0041] It can be understood that λ is the wavelength of the central operating frequency of the miniaturized 5G antenna in free space. When the spacing between the dual-polarized low-frequency radiating units is less than 0.35λ, it is more likely to cause coupling between the dual-polarized low-frequency radiating units, affecting the overall radiation performance. When the spacing between the dual-polarized low-frequency radiating units is greater than 0.6λ, the number of side lobes will increase and the directivity will deteriorate. At the same time, the number of ultra-small radiation aperture dual-polarized low-frequency radiating units will be reduced under the same volume, affecting the radiation effect. Therefore, the spacing range between the first dual-polarized low-frequency radiating unit 20 and the second dual-polarized low-frequency radiating unit 30 is 0.35λ~0.6λ, which is optimal;

[0042] In one embodiment, the feeding amplitude ratio received by the first dual-polarization low-frequency radiating unit 20 and the second dual-polarization low-frequency radiating unit 30 is approximately 30:1, the feeding phase received by the first dual-polarization low-frequency radiating unit 20 is 0°, and the feeding phase received by the second dual-polarization low-frequency radiating unit 30 is -135°. The first dual-polarization low-frequency radiating unit 20 with relatively high feeding power can obtain a better center shaping effect, and at the same time, with the configuration of the feeding phase, it can obtain a better beam convergence capability, and can obtain a better sidelobe suppression capability under the condition of forming a square beam.

[0043] In summary, the miniaturized 5G antenna in the above embodiment of the present invention is provided with a plurality of first dual-polarized low-frequency radiating units in a first square array and a plurality of second dual-polarized low-frequency radiating units in a second square array, wherein the first square array is located inside the second square array, and the second square array is arranged at a 45° angle relative to the first square array. This design structure provides conditions for shaping the antenna signal into a square beam, and since the dual-polarized low-frequency radiating units are all arranged in a square shape, the number of dual-polarized low-frequency radiating units used is also smaller, so that the miniaturized 5G antenna is small in size, light in weight, and has a high wavelength. The beam is also more balanced, the cost is lower, the production efficiency is improved, the structure is simpler, more beautiful, easier to use and maintain; the metal radiator structures on the first dual-polarization low-frequency radiating unit and the second dual-polarization low-frequency radiating unit are both chamfered, and have strong sidelobe suppression capability, which can effectively reduce the mutual influence such as mutual coupling between the dual-polarization low-frequency radiating units when combined with the first dual-polarization low-frequency radiating unit in the first square array and the second dual-polarization low-frequency radiating unit in the second square array, making the miniaturized 5G antenna more suitable for regional communications and has excellent ability to suppress interference from neighboring areas.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A miniaturized 5G antenna, characterized in that: It includes a reflector, and a plurality of first dual-polarized low-frequency radiation units and a plurality of second dual-polarized low-frequency radiation units provided on the reflector. The plurality of first dual-polarized low-frequency radiation units are arranged in a first square array on the reflector, and the plurality of second dual-polarized low-frequency radiation units are arranged in a second square array on the reflector. The first square array is located inside the second square array, and the second square array is arranged at a 45° angle relative to the first square array. Both the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit include a metal radiator structure located above the reflector and arranged in a square shape, and the four corners of the metal radiator structure are chamfered.

2. The miniaturized 5G antenna according to claim 1, characterized in that: There are four first dual-polarized low-frequency radiation units, and the four first dual-polarized low-frequency radiation units are respectively arranged at the four corners of the first square array.

3. The miniaturized 5G antenna according to claim 2, characterized in that: There are four second dual-polarized low-frequency radiation units, and the four second dual-polarized low-frequency radiation units are respectively arranged at the four corners of the second square array, and the distance from each second dual-polarized low-frequency radiation unit to the first square array is the same.

4. The miniaturized 5G antenna according to claim 3, characterized in that: The reflector is arranged in a square shape, and the center of the first square array coincides with the center of the reflector.

5. The miniaturized 5G antenna according to claim 1, characterized in that: The first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit further include a coaxial line passing through the reflector and a metal feeding sheet provided on the metal radiator structure.

6. The miniaturized 5G antenna according to claim 5, characterized in that: The metal radiator structure includes a balun and a radiation surface. The radiation surface is composed of four radiation sub-surfaces, and the four radiation sub-surfaces are arranged in a "field" shape. The height of the balun is 0.15λ - 0.35λ, and the edges and corners of each radiation sub-surface far from the center of the radiation surface are chamfered.

7. The miniaturized 5G antenna according to claim 6, characterized in that: The metal feeding sheet is located above the center of the radiation surface, and the metal feeding sheet is arranged in an "X" shape.

8. The miniaturized 5G antenna according to claim 4, characterized in that: The spacing range between the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit is 0.35λ - 0.6λ.

9. The miniaturized 5G antenna according to claim 4, characterized in that: The feeding amplitude ratio received between the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit is (20 - 50):1, and the feeding phase difference received between the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit is 120° - 180°.

10. The miniaturized 5G antenna according to claim 1, characterized in that: The operating frequency band range of the first dual-polarized low-frequency radiation unit and the second dual-polarized low-frequency radiation unit is 690 MHz - 960 MHz.

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