阅读说明：本技术 一种四通道天线 (Four-channel antenna ) 是由 尚春辉 钱伟雄 朱强 黄世雄 于 2021-08-06 设计创作，主要内容包括：本发明涉及一种四通道天线,包括反射板和4个天线单元,各天线单元均包括2个振子臂,各天线单元上的2个振子臂相互远离的那一端均为自由端；4个天线单元均安装在反射板上,且4个天线单元围合成一矩形包围圈,该矩形包围圈的角位由邻接的2个天线单元的2个振子臂的自由端对接而成；其特点在于各天线单元的2个振子臂上各自套装固定有隔离管,所述隔离管为一端封闭、另一端开口的筒体状结构；各天线单元上的2个隔离管的封闭端相互靠近,且各天线单元的振子臂上的隔离管在封闭端处与振子臂导通；邻接的2个天线单元之间,对接形成角位的那2个振子臂的自由端导通。本发明具有结构简单、设计合理、体积小及相邻的通道之间隔离度高等特点。(The invention relates to a four-channel antenna, which comprises a reflecting plate and 4 antenna units, wherein each antenna unit comprises 2 oscillator arms, and the ends, far away from each other, of the 2 oscillator arms on each antenna unit are free ends; the 4 antenna units are all arranged on the reflecting plate, the 4 antenna units are enclosed to form a rectangular enclosure, and the angular position of the rectangular enclosure is formed by butt joint of free ends of 2 oscillator arms of the adjacent 2 antenna units; the antenna is characterized in that 2 vibrator arms of each antenna unit are respectively sleeved and fixed with an isolation pipe, and the isolation pipe is of a cylindrical structure with one end closed and the other end opened; the closed ends of the 2 isolation tubes on each antenna unit are close to each other, and the isolation tubes on the oscillator arms of each antenna unit are communicated with the oscillator arms at the closed ends; between the adjacent 2 antenna units, the free ends of the 2 oscillator arms which are butted to form the angle position are conducted. The invention has the characteristics of simple structure, reasonable design, small volume, high isolation between adjacent channels and the like.)

1. A four-channel antenna comprises a reflecting plate and 4 antenna units, wherein each antenna unit comprises 2 oscillator arms, one end of each of the 2 oscillator arms on each antenna unit is close to each other, and the end, far away from each other, of each of the 2 oscillator arms on each antenna unit is a free end; the 4 antenna units are all arranged on the reflecting plate, the 4 antenna units are enclosed to form a rectangular enclosure, and the angular position of the rectangular enclosure is formed by butt joint of free ends of 2 oscillator arms of the adjacent 2 antenna units; the method is characterized in that: an isolation pipe is sleeved and fixed on each of 2 vibrator arms of each antenna unit, and the isolation pipe is of a cylindrical structure with one end closed and the other end open; the closed ends of the 2 isolation tubes on each antenna unit are close to each other, and the isolation tubes on the oscillator arms of each antenna unit are communicated with the oscillator arms at the closed ends; between the adjacent 2 antenna units, the free ends of the 2 oscillator arms which are butted to form the angle position are conducted.

2. A four-channel antenna according to claim 1, wherein: the axes of the 2 oscillator arms of each antenna unit are positioned on the same vertical plane, and the axes of the 2 oscillator arms of each antenna unit form an included angle alpha which is within the range of 10-170 degrees.

3. A four-channel antenna according to claim 1, wherein: each antenna element is a half-wave dipole antenna element.

4. A four-channel antenna according to claim 3, wherein: the distance from the center of the end face of the closed end to the center of the end face of the open end of the isolation tube on each antenna unit is D1, D1 is 0.25 x lambda, and lambda is the working wavelength of the antenna unit.

5. The four-channel antenna of claim 4, wherein: the distance between the center of the free end face of the oscillator arm of each antenna unit and the center of the end face of the open end of the isolation tube mounted thereon is D2, and D2 is in the range of 1/20X lambda-1/8X lambda.

6. A four-channel antenna according to claim 1, wherein: the end face of the opening end of the isolation tube on each antenna unit is an inclined tangent plane, the included angle formed by the inclined tangent plane and the axis of the isolation tube is gamma, and the included angle gamma is in the range of 30-60 degrees.

7. A four-channel antenna according to claim 1, wherein: the periphery of reflecting plate all is equipped with the metal curb plate, and reflecting plate and 4 metal curb plates constitute an upper shed's metal box body, and 4 antenna element all are in the metal box body.

8. A four-channel antenna according to claim 1, wherein: the antenna is characterized by further comprising a wave guide device, wherein the wave guide device is a linear rod body or a spiral rod body made of metal, the bottom end of the wave guide device is fixed on the phase center of the reflecting plate, and the phase center of the reflecting plate is the center of an enclosing ring formed by enclosing the 4 antenna units.

9. A four-channel antenna according to claim 1, wherein: still include leading the ripples ware, lead the ripples ware for the built on stilts formula, this built on stilts formula and lead the ripples ware and include that 2 are cross staggered connection medium columns together, the both ends of each medium column are formed with the montant portion of buckling downwards respectively, and the built on stilts formula is led the ripples ware and is in 4 antenna element and encloses the encirclement ring that closes formation in, and the built on stilts formula is led the ripples ware and is installed on the plane of reflection of reflecting plate through 2 insulating poles.

Technical Field

The invention relates to the technical field of mobile communication, in particular to a four-channel antenna.

Background

With the development of mobile communication, the MIMO technology has more and more requirements on the number of channels of an antenna, and at least 4TR is required to meet the use requirement in the use process. If the existing antenna wants to realize 4TR (four-channel), a common method is to use two (or two groups of) dual-polarized elements to realize, that is, each element provides 2TR, and two elements are 4TR, so that the 4TR radiating element formed by simply combining 2 dual-polarized elements has a large size and occupies a large area. The applicant has also filed a technical proposal called "a 4TR radiating element for mobile communication" with patent No. 202010633395.4, in which the oscillator arms of adjacent 2 dipoles are cross-connected, which results in a problem of poor isolation between each channel and its adjacent two channels, and the adjacent 2 channels are likely to generate coupling current interference during use.

Disclosure of Invention

The invention aims to provide a four-channel antenna which has the advantages of simple structure, reasonable design, small volume, high isolation between adjacent channels and the like.

The technical scheme of the invention is realized as follows: a four-channel antenna comprises a reflecting plate and 4 antenna units, wherein each antenna unit comprises 2 oscillator arms, one end of each of the 2 oscillator arms on each antenna unit is close to each other, and the end, far away from each other, of each of the 2 oscillator arms on each antenna unit is a free end; the 4 antenna units are all arranged on the reflecting plate, the 4 antenna units are enclosed to form a rectangular enclosure, and the angular position of the rectangular enclosure is formed by butt joint of free ends of 2 oscillator arms of the adjacent 2 antenna units; the antenna is characterized in that 2 vibrator arms of each antenna unit are respectively sleeved and fixed with an isolation pipe, and the isolation pipe is of a cylindrical structure with one end closed and the other end opened; the closed ends of the 2 isolation tubes on each antenna unit are close to each other, and the isolation tubes on the oscillator arms of each antenna unit are communicated with the oscillator arms at the closed ends; between the adjacent 2 antenna units, the free ends of the 2 oscillator arms which are butted to form the angle position are conducted.

Further, each antenna element is a half-wave dipole antenna element.

Further, the distance from the center of the end face of the closed end to the center of the end face of the open end of the isolation tube on each antenna unit is D1, D1 is 0.25 x lambda, and lambda is the working wavelength of the antenna unit.

Further, the distance between the center of the free end face of the dipole arm of each antenna element and the center of the open end face of the isolation tube mounted thereon is D2, and D2 is in the range of 1/20 x λ to 1/8 x λ.

Furthermore, the end face of the opening end of the isolation tube on each antenna unit is an inclined tangent plane, the included angle formed by the inclined tangent plane and the axis of the isolation tube is gamma, and the included angle gamma is in the range of 30-60 degrees.

The invention has the beneficial effects that: according to the invention, the isolation tubes are sleeved on the oscillator arms of 4 antenna units, so that the oscillator arms of all the antenna units are connected with the isolation tubes to form a sleeve structure combination, and the design that the free ends of the 2 oscillator arms forming the angle positions are communicated in a butt joint mode between the adjacent 2 antenna units is combined.

Drawings

Fig. 1 is a schematic perspective view of embodiment 1.

Fig. 2 is a schematic front view of an antenna unit according to embodiment 1.

Fig. 3 is a schematic top view of the antenna unit of embodiment 1.

Fig. 4 is a diagram illustrating isolation test of 2 adjacent antenna units in simulation of a four-channel antenna formed by simply splicing 4 antenna units.

Fig. 5 is an isolation test chart of 2 adjacent antenna units in simulation of example 1.

Fig. 6 is a schematic structural view of embodiment 2.

Fig. 7 is a schematic structural view of the wave guide of embodiment 4.

Fig. 8 is a schematic structural diagram of an antenna unit according to embodiment 5.

Description of reference numerals: 1-a reflector plate; 2-an antenna element; 21-a vibrator arm; 22-free end; 23-a PCB board; 24-a first feed; 25-a second feeding section; 3-an isolation pipe; 31-closed end; 32-open end; 4-metal side plate.

51-a wave guide; 52-a reflector plate; 53-an antenna element;

6-an overhead wave guide; 61-a media column; 62-a mast section; 63-an insulating rod;

7-an antenna element; 71-vibrator arm.

Detailed Description

Example 1

As shown in fig. 1 and fig. 2, the present embodiment is a four-channel antenna, including a reflection plate 1 and 4 antenna units 2, each antenna unit 2 includes 2 dipole arms 21, one end of each of the 2 dipole arms 21 on each antenna unit 2 is close to each other, and the end of each of the 2 dipole arms 21 on each antenna unit 2 away from each other is a free end 22; the 4 antenna units 2 are all arranged on the reflecting plate 1, the 4 antenna units 2 form a rectangular surrounding ring in a surrounding mode, and the corner position of the rectangular surrounding ring is formed by butt joint of free ends 22 of the 2 oscillator arms 21 of the adjacent 2 antenna units 2; an isolation tube 3 is sleeved and fixed on each of the 2 vibrator arms 21 of each antenna unit 2, and the isolation tube 3 is of a cylindrical structure with one end closed and the other end opened; the closed ends 31 of the 2 isolation tubes 3 on each antenna unit 2 are close to each other, and the isolation tubes 3 on the vibrator arm 21 of each antenna unit 2 are communicated with the vibrator arm 21 at the closed ends 31; between 2 adjacent antenna unit 2, the free end 22 of 2 oscillator arms 21 that form the angle position in butt joint is conducted, and the free end 22 of 2 oscillator arms 21 that form the angle position in butt joint is conducted through welding, so that the connection structure between 4 antenna unit 2 is further firmer. In the simulation test, the isolation test chart of 2 adjacent antenna units of the four-channel antenna simply spliced by the existing 4 antenna units is shown in fig. 4 in the simulation, while the isolation test chart of 2 adjacent antenna units of the four-channel antenna in the simulation is shown in fig. 5, and by comparing fig. 4 with fig. 5, it can be known that 4 antenna units 2 obtained by the design of the four-channel antenna after the simulation test obtain higher isolation compared with the four-channel antenna simply spliced by the 4 antenna units, and the current of the vibrator arm 21 of the working channel is effectively inhibited from flowing to the vibrator arm 21 of the adjacent channel, so that the isolation between each channel and two adjacent channels is improved, and the four-channel antenna has the advantages of simple structure, reasonable design, small volume and high isolation between adjacent channels.

In order to make the structure of the antenna unit 2 more reasonable, as shown in fig. 1 and 2, each antenna unit 2 is a half-wave dipole antenna unit, each antenna unit 2 includes a PCB 23, 2 dipole arms 21 are formed on one surface of the PCB 23 by means of copper coating or metal patch, the ends of the 2 dipole arms 21 on the antenna unit 2 close to each other are respectively connected with a first feeding portion 24 which is conducted with the reflector 1, a second feeding portion 25 which is fed in cooperation with the first feeding portion 24 of each dipole arm 21 is formed on the other surface of the PCB 23, when in use, an inner conductor of a feeder line for transmitting signals to the antenna unit 2 is conducted with the second feeding portion 25, and an outer conductor of the feeder line for transmitting signals to the antenna unit 2 is connected on the reflector 1 between the first feeding portions 24 of the 2 dipole arms 21. As shown in fig. 3, the distance from the center of the end face of the closed end 31 to the center of the end face of the open end 32 of the isolation tube 3 on each antenna element 2 is D1, D1 is 0.25 × λ, λ is the operating wavelength of the antenna element 2, and λ is 60mm in the present embodiment.

In order to make the structure of the antenna element 2 more reasonable, as shown in fig. 3, the distance between the center of the end face of the free end 22 of the dipole arm 21 of each antenna element 2 and the center of the end face of the open end 32 of the isolation tube 3 mounted thereon is D2, D2 is in the range of 1/20 λ to 1/8 λ, and D2 in this embodiment is specifically 1/14 λ.

In order to make the distance between the adjacent 2 antenna units 2 closer to each other on the premise that the isolation tube 3 between the adjacent 2 antenna units 2 is not conducted, and further reduce the volume of the four-channel antenna, as shown in fig. 1, 2, and 3, the end surface of the opening end 32 of the isolation tube 3 on each antenna unit 2 is an oblique tangent plane, an included angle formed by the oblique tangent plane and the axis of the isolation tube 3 is γ, the included angle γ is in the range of 30 ° to 60 °, and the included angle γ in this embodiment is 45 °.

In order to ensure that the directional diagrams of the 4 antenna units 2 of the four-channel antenna can be kept consistent when the four-channel antenna is used, and the four-channel antenna has a better use effect, as shown in fig. 1, metal side plates 4 are arranged on the periphery of the reflecting plate 1, the reflecting plate 1 and the 4 metal side plates 4 form a metal box body with an upper opening, and the 4 antenna units 2 are all located in the metal box body.

Example 2

The present embodiment is different from embodiment 1 in that: the metal can is not formed in this embodiment. As shown in fig. 6, the present embodiment further includes a wave guide 51, where the wave guide 51 is a linear rod made of metal, a bottom end of the wave guide 51 is fixed on a phase center of the reflection plate 52, and the phase center of the reflection plate 52 is a center of an enclosure formed by enclosing the 4 antenna units 53. The design of the wave guide device 51 can reduce the coupling between the 2 oppositely arranged antenna units 53, and can improve the isolation degree by about 15dB, so that the 2 oppositely arranged antenna units 53 can be placed very close, the distance between the 2 oppositely arranged antenna units 53 can be reduced by about 35%, the miniaturization of the antenna is realized, meanwhile, the distortion of a directional diagram cannot be caused, and the practical engineering value is very high.

Example 3

The present embodiment is different from embodiment 2 in that: the wave guide structure is different. The wave guide in this embodiment is a spiral rod made of metal, and the bottom end of the wave guide is fixed to the phase center of the reflection plate (this embodiment is not shown in the drawings). By making the wave guide into a spiral rod structure, the isolation between the 2 antenna units of this embodiment, which are opposite to the scheme of embodiment 2, is higher, so that the 2 antenna units, which are oppositely arranged, can be placed closer to each other, and the volume of the four-channel antenna of this embodiment is smaller.

Example 4

The present embodiment is different from embodiment 2 in that: the wave guide structure is different. As shown in fig. 7, the wave guide device in this embodiment is an overhead wave guide device 6, the overhead wave guide device 6 includes 2 dielectric columns 61 cross-connected together, vertical rod portions 62 bent downward are formed at two ends of each dielectric column 61, the overhead wave guide device 6 is located in an enclosure formed by enclosing 4 antenna units, and the overhead wave guide device 6 is mounted on the reflection surface of the reflection plate through 2 insulation rods 63. In use, two ends of one of the dielectric posts 61 are directed to 2 of the oppositely disposed antenna elements, and two ends of the other dielectric post 61 are directed to the other 2 of the oppositely disposed antenna elements. The wave leading device of the present embodiment is an overhead wave leading device 6, the wave leading devices of the embodiments 2 and 3 are all grounded wave leading devices, and the function of the wave leading device of the present embodiment is the same as that of the wave leading device of the embodiment 2 or 3, and the design is made only to meet the needs of different application scenarios.

Example 5

The present embodiment is different from embodiment 1 in that: as shown in fig. 8, the axes of the 2 dipole arms 71 of each antenna unit 7 are located on the same vertical plane, and the axes of the 2 dipole arms 71 of each antenna unit 7 form an included angle α, where the included angle α is in a range of 10 ° to 170 °, and the included angle α in this embodiment is specifically 160 °. In this embodiment, the dipole arm 71 of the antenna unit 7 and the reflection surface of the reflection plate are arranged in an inclined manner, so that the 4 antenna units 7 are closer to the phase center, and the overall volume of the four-channel antenna is further reduced.