CN108365331A - A kind of high isolation Bipolarization antenna for base station unit towards 5G applications - Google Patents
A kind of high isolation Bipolarization antenna for base station unit towards 5G applications Download PDFInfo
- Publication number
- CN108365331A CN108365331A CN201810182864.8A CN201810182864A CN108365331A CN 108365331 A CN108365331 A CN 108365331A CN 201810182864 A CN201810182864 A CN 201810182864A CN 108365331 A CN108365331 A CN 108365331A
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- antenna
- dipole antenna
- dipole
- base station
- dielectric
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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Abstract
The present invention relates to a kind of high isolation Bipolarization antenna for base station units towards 5G applications, include from and under be sequentially arranged dielectric-slab, coaxial feeder, backboard and SMA feed, the dielectric-slab positive and negative has etched the first bow-tie type dipole antenna and the second bow-tie type dipole antenna that ± 45 ° are disposed vertically, each bow-tie type dipole antenna is made of two symmetrically arranged dipole antenna arms, and the dipole antenna arm includes optimization fragment type parasitic structure.The advantage of the invention is that：The high isolation Bipolarization antenna for base station unit that the present invention is applied towards 5G, by optimizing fragment type parasitic structure, being formed has low-loss high isolation characteristic, the base station antenna unit of low-loss high isolation, and then antenna own loss can be reduced, and reduce the self-interference between antenna.
Description
Technical field
The present invention relates to a kind of Bipolarization antenna for base station unit, more particularly to a kind of high isolation dual polarization towards 5G applications
Base station antenna unit.
Background technology
In recent years, with the rapid development of wireless communication technique, people increasingly promote the craving of data transfer rate.Due to can
It is widely used in base station system with the channel capacity and faster transmission rate, dual polarized antenna of realizing bigger.However
In communication system, often there is very strong mutual coupling between the dual polarized antenna of base station antenna unit, self-interference will drop caused by this
The performance of low base station system.Therefore, the base station antenna unit of the high heteropolar isolation of design is essential.
The research about high isolation Bipolarization antenna for base station unit is constantly being carried out both at home and abroad, document [1] (hair is for army building, in
Jumpbogroup, a kind of extensive mimo antenna battle arrays for 5G of burnt Yongchang design modern radars, 2 (2016), 66-69.) using orthogonal
H-shaped aperture-coupled, devise isolation be higher than 23dB dual polarized antenna unit；Document [2] (K-L.Wu, C.Wei,
X.Mei and Z.Zhang,Array-Antenna Decoupling Surface,IEEE Trans.Antennas
Propag., 12 (2017), 6728-6738.) using decoupling and surface counteracting coupled wave, it is bipolar higher than 30dB to realize isolation
Change base station antenna unit；Document [3] (K.Mak, H.Lai and K.Luk, A 5G Wideband Patch Antenna with
Antisymmetric L-shaped Probe Feeds, IEEE Trans.Antennas Propag., 2017.) using orthogonal
L-shaped probe couple feed, devise isolation be higher than 30dB Bipolarization antenna for base station unit.
Currently, accurately the Bipolarization antenna for base station unit of the higher performance of covering 5G frequency ranges (3.4-3.6GHz) is still empty
In vain.The dipole antenna that use ± 45 ° of the present invention are disposed vertically realizes dual polarization, is realized more by optimizing fragment type parasitic structure
High isolation performance.Towards 5G application backgrounds, the present invention devises a double-polarized base station for being operated in 3.4-3.6GHz frequency ranges
Antenna element, base station antenna unit return loss in working frequency range are higher than 20dB, and the isolation between dual polarized antenna is higher than
40dB。
Invention content
Applying towards 5G for higher isolation performance can be realized the technical problem to be solved in the present invention is to provide a kind of
High isolation Bipolarization antenna for base station unit.
In order to solve the above technical problems, the technical scheme is that：A kind of high isolation dual polarization base towards 5G applications
Station antenna unit, innovative point are：Include from and under be sequentially arranged dielectric-slab, coaxial feeder, backboard and SMA feed, institute
It gives an account of scutum positive and negative and has etched the first bow-tie type dipole antenna and the second bow-tie type dipole day that ± 45 ° are disposed vertically
Line, each bow-tie type dipole antenna is made of two symmetrically arranged dipole antenna arms, and the dipole antenna arm
Including optimizing fragment type parasitic structure.
Further, the two dipole antenna arms difference of the first bow-tie type dipole antenna in the base station antenna unit
In dielectric-slab upper and lower surface, two dipole antenna arms of the second bow-tie type dipole antenna are etched in dielectric-slab etching
Lower surface, and two dipole antennas vertically realize dual polarization.
Further, the coaxial feeder includes connecting respectively with two dipole antennas and the first coaxial feed disposed in parallel
Line and the second coaxial feeder, the inner wire of first coaxial feeder and the first collar dipole antenna are arranged in dielectric-slab upper table
The connection of the dipole patch in face, the outer conductor of first coaxial feeder and the first collar dipole antenna are arranged in dielectric-slab
The dipole patch and backboard of lower surface connect；The inner wire of second coaxial feeder is set with the second collar dipole antenna
The transmission line connection in dielectric-slab upper surface is set, upper surface transmission line is being situated between by through-hole and the setting of the second collar dipole antenna
One dipole patch of scutum lower surface connects, and the outer conductor of second coaxial feeder and the second collar dipole antenna are arranged
Another dipole patch and backboard in dielectric-slab lower surface connect.
Further, the dipole antenna arm is the composite structure of isosceles triangle and fragment type parasitic structure.
Further, fragment type parasitic structure optimizes to obtain by multi-objective optimization algorithm in the dipole antenna arm.
The advantage of the invention is that：
(1) high isolation Bipolarization antenna for base station unit of the present invention towards 5G applications, by optimizing fragment type parasitic structure,
Being formed has low-loss high isolation characteristic, the base station antenna unit of low-loss high isolation, and then can reduce antenna own loss,
And reduce the self-interference between antenna；Compared with the antenna element of traditional base station, the return loss of inventive antenna unit is higher than
20dB, the isolation between dual polarized antenna are higher than 40dB, and as 5G base station antenna units, the present invention will further promote the following 5G
Base station system performance；
(2) high isolation Bipolarization antenna for base station unit of the present invention towards 5G applications, fragment type is parasitic in dipole patch
Structure optimizes to obtain by multi-objective optimization algorithm, is based on multi-objective optimization algorithm, searches for the parasitic structure of low-loss high isolation.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is ± 45 ° of Bipolarization antenna for base station unit overall schematics in the embodiment of the present invention.
Fig. 2 is base station antenna unit side cutaway view in the embodiment of the present invention.
Fig. 3 and Fig. 4 is the dipole antenna figure etched in the embodiment of the present invention in dielectric-slab.
Fig. 5~Fig. 9 is the design cycle schematic diagram of fragment type parasitic structure model in the embodiment of the present invention.
Figure 10 and 11 is respectively the parasitic structure and dipole antenna model after optimizing in the embodiment of the present invention.
Figure 12 is the S parameter that base station antenna unit emulates in the embodiment of the present invention.
Figure 13 and 14 is the antenna pattern that base station antenna unit emulates at 3.5GHz in the embodiment of the present invention.
Specific implementation mode
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among the embodiment described range.
Embodiment
The high isolation Bipolarization antenna for base station unit that the present embodiment is applied towards 5G, as illustrated in fig. 1 and 2, including from and under
Dielectric-slab 1, coaxial feeder 2, backboard 3 and the SMA feeds being sequentially arranged, have etched ± 45 ° in 1 positive and negative of dielectric-slab and have been disposed vertically
The first bow-tie type dipole antenna 4 and the second bow-tie type dipole antenna 5, the first bow-tie type dipole antenna 4 includes symmetrical
The dipole antenna arm 41 and dipole antenna arm 42 of setting, the second bow-tie type dipole antenna 5 include symmetrically arranged dipole
Sub-antenna arm 51 and dipole antenna arm 52, and each dipole antenna arm includes optimization fragment type parasitic structure.
As shown in Figures 3 and 4, upper table of the etching of dipole antenna arm 41 of the first bow-tie type dipole antenna 4 in dielectric-slab 1
The dipole antenna arm 42 in face, the first bow-tie type dipole antenna 4 is etched in the lower surface of dielectric-slab 1, the second bow-tie type dipole
Two dipole antenna arms of sub-antenna 5 are etched in the lower surface of dielectric-slab 1, and the inner end of dipole antenna arm 41 is connected with idol
Extremely sub- patch 43, the inner end of dipole antenna arm 51 are connected with dipole patch 53 by through-hole.
Coaxial feeder 2 include connect respectively with two dipole antennas and the first coaxial feeder disposed in parallel 21 and second together
Feeder shaft 22, as shown in Figures 2 and 3, the inner wire of the first coaxial feeder 21 and the first collar dipole antenna 4 are arranged in dielectric-slab
The connection of the dipole patch 43 of 1 upper surface, the outer conductor of the first coaxial feeder 21 and the setting of the first collar dipole antenna 4 exist
The dipole patch 42 (42 inner end of dipole antenna arm) and backboard 3 of 1 lower surface of dielectric-slab connect；As shown in figure 4, second is same
The inner wire of feeder shaft 22 is connect with the transmission line that the second collar dipole antenna 5 is arranged in 1 upper surface of dielectric-slab, and upper surface passes
Defeated line is connect by through-hole 6 with the dipole patch 53 that the second collar dipole antenna 5 is arranged in 1 lower surface of dielectric-slab, and second
52 (the dipole of dipole patch in 1 lower surface of dielectric-slab is arranged in the outer conductor of coaxial feeder 22 and the second collar dipole antenna 5
52 inner end of sub-antenna arm) and the connection of backboard 3.
In embodiment, dipole antenna arm is the composite structure of isosceles triangle and fragment type parasitic structure, wherein Fig. 4
In four identical rectangular areas be fragment type parasitic structure design section.Fragment type structure can also be applied to isosceles
Triangle, the design in other regions of the antennas such as backboard.
Due to the symmetry of antenna, as shown in figure 5, rectangular area can be divided into identical two rectangles；Such as Fig. 6
Shown, each rectangle can be separated into the rectangle fragment of m rows n row, this tile structure unit can also be rectangular with circle,
Triangle, polygon, the diversified forms such as annular exist, and unit arrangement density can be adjusted according to actual conditions, then be assigned
Give each fragment " 0 " or " 1 "；If " 0 " indicates that nonmetallic unit, " 1 " indicate that metal unit, fragment type structure can indicate
At the shape of Fig. 7；Symmetry operation is carried out along dotted line, design structure shown in Fig. 8 can be obtained；Design structure is etched into medium
Plate corresponding region can obtain antenna as shown in Figure 9.
The design of the present embodiment low-loss high isolation 5G base station antenna units is a multi-objective optimization question, fragment type knot
Structure converts antenna structure optimization problem to the optimization of two-dimensional matrix, the setting of object function be in entire process of optimization and
Its important link.For the design towards dual polarization high-performance 5G antenna for base station, return loss is the target of overriding concern, root
According to the symmetry of antenna, it is described as follows：
Wherein [ω1,ω2] indicate Antenna Operation frequency range, S11Indicate return loss.Design the base stations 5G day of high matching performance
Line unit, can be by desired value Q1It is set as 20.
In addition to return loss, isolation is also antenna for base station important indicator needed to be considered, is described as follows：
Wherein S12Indicate the isolation between dual polarized antenna in antenna element, it can be by desired value Q240 are set as to reach high
The design of isolation.
The design optimizes fragment type parasitic structure by taking low-loss high isolation as an example, by multi-objective optimization algorithm, realizes
The return loss of 20dB and the isolation of 40dB.In addition, base station antenna unit, to beam angle, cross polarization ratio and front and back ratio also have
Certain requirement, it is only necessary to increase object function in multi-objective optimization algorithm to optimize the radiation characteristic of antenna.
Fixed antenna parameter：L1=8.4mm, L2=14mm, L3=7mm, L4=6.5mm, L5=7.4mm, L6=
1.8mm, α=87 °, W=60mm, H=22mm, h=4mm. is by [ω1,ω2] be set as 5G working frequency range [3.4GHz,
3.6GHz], the final structure and antenna structure searched for are as shown in FIG. 10 and 11.As shown in figure 12, antenna is in 3.4-
In 3.6GHz band limits, return loss is higher than 20dB, and the isolation between dual polarized antenna is higher than 40dB.As shown in Figs. 13 and 14,
The axial direction cross polarization of the faces antenna H be less than -25dB, half-power beam width be 90 °, within the scope of ± 60 ° cross polarization less than -
18dB；The faces E half-power beam width is 70 °；Antenna gain is 8.1dB, front and back than being higher than 23dB.
The basic principles and main features and advantages of the present invention of the present invention have been shown and described above.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (5)
1. a kind of high isolation Bipolarization antenna for base station unit towards 5G applications, it is characterised in that：Including from and under be sequentially arranged
Dielectric-slab, coaxial feeder, backboard and SMA feeds, the dielectric-slab positive and negative etched ± 45 ° of first knots being disposed vertically
Type dipole antenna and the second bow-tie type dipole antenna, each bow-tie type dipole antenna is by two symmetrically arranged dipoles
Sub-antenna arm is constituted, and the dipole antenna arm includes optimization fragment type parasitic structure.
2. the high isolation Bipolarization antenna for base station unit according to claim 1 towards 5G applications, it is characterised in that：It is described
Two dipole antenna arms of the first bow-tie type dipole antenna in base station antenna unit etch respectively in dielectric-slab upper surface and
Two dipole antenna arms of lower surface, the second bow-tie type dipole antenna are etched in dielectric-slab lower surface, and two dipole days
Line vertically realizes dual polarization.
3. wanting the high isolation Bipolarization antenna for base station unit applied towards 5G described in 2 according to right, it is characterised in that：It is described same
Feeder shaft includes connecting respectively with two dipole antennas and the first coaxial feeder disposed in parallel and the second coaxial feeder, and described the
The inner wire of one coaxial feeder is connect with the dipole patch that the first collar dipole antenna is arranged in dielectric-slab upper surface, described
Dipole patch and the back of the body in dielectric-slab lower surface is arranged in the outer conductor of first coaxial feeder and the first collar dipole antenna
Plate connects；The transmission line in dielectric-slab upper surface is arranged in the inner wire of second coaxial feeder and the second collar dipole antenna
The dipole patch in dielectric-slab lower surface is arranged by through-hole and the second collar dipole antenna for connection, upper surface transmission line
Connection, another dipole in dielectric-slab lower surface is arranged in the outer conductor of second coaxial feeder and the second collar dipole antenna
Sub- patch and backboard connection.
4. the high isolation Bipolarization antenna for base station unit according to claim 1 towards 5G applications, it is characterised in that：It is described
Dipole antenna arm is the composite structure of isosceles triangle and fragment type parasitic structure.
5. the high isolation Bipolarization antenna for base station unit according to claim 1 towards 5G applications, it is characterised in that：It is described
Fragment type parasitic structure optimizes to obtain by multi-objective optimization algorithm in dipole antenna arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182864.8A CN108365331A (en) | 2018-03-06 | 2018-03-06 | A kind of high isolation Bipolarization antenna for base station unit towards 5G applications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182864.8A CN108365331A (en) | 2018-03-06 | 2018-03-06 | A kind of high isolation Bipolarization antenna for base station unit towards 5G applications |
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| Publication Number | Publication Date |
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| CN108365331A true CN108365331A (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810182864.8A Pending CN108365331A (en) | 2018-03-06 | 2018-03-06 | A kind of high isolation Bipolarization antenna for base station unit towards 5G applications |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111162380A (en) * | 2019-12-31 | 2020-05-15 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Dual-polarized broadband high-gain wide-beam antenna |
| CN111755808A (en) * | 2020-07-02 | 2020-10-09 | 重庆邮电大学 | Broadband millimeter wave MIMO antenna loaded with horizontal radiation branches and butterfly parasitic units |
| CN112751158A (en) * | 2019-10-31 | 2021-05-04 | 华为技术有限公司 | Antenna assembly and communication equipment |
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2018
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751158A (en) * | 2019-10-31 | 2021-05-04 | 华为技术有限公司 | Antenna assembly and communication equipment |
| CN111162380A (en) * | 2019-12-31 | 2020-05-15 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Dual-polarized broadband high-gain wide-beam antenna |
| CN111755808A (en) * | 2020-07-02 | 2020-10-09 | 重庆邮电大学 | Broadband millimeter wave MIMO antenna loaded with horizontal radiation branches and butterfly parasitic units |
| CN111755808B (en) * | 2020-07-02 | 2022-07-19 | 重庆邮电大学 | Broadband millimeter wave MIMO antenna loaded with horizontal radiation branches and butterfly parasitic units |
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Application publication date: 20180803 |