CN109841943A - Three frequency mimo antenna systems and mobile terminal applied to 5G communication - Google Patents
Three frequency mimo antenna systems and mobile terminal applied to 5G communication Download PDFInfo
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Abstract
The invention discloses a kind of three frequency mimo antenna systems and mobile terminal applied to 5G communication, antenna system includes at least four antenna element, antenna element includes irradiation structure and feed structure, irradiation structure includes first level radiation branch, the second horizontal radiation branch, end radiation branch and the first vertical radiation branch, the first gap is equipped between first level radiation branch and the second horizontal radiation branch, the first vertical radiation branch is equipped with grounding point far from one end of first level radiation branch；The feed structure includes sequentially connected first level feed branch, the first vertical feed branch, the second horizontal feed branch, the second vertical feed branch and the horizontal feed branch of third, and the second gap is equipped between first level feed branch and the second horizontal feed branch.Antenna system can cover 2.515~2.675GHz, 3.4~3.6GHz and 4.8~4.9GHz, tri- frequency ranges well；The overall dimensions of antenna element are small and high-efficient, are suitable for the mobile terminals such as mobile phone.
Description
Technical field
The present invention relates to antenna technical field more particularly to a kind of three frequency mimo antenna systems and shifting applied to 5G communication
Dynamic terminal.
Background technique
With the fast development of wireless communication technique, the 5th generation (5G) wireless communication system will be commercialized in the year two thousand twenty to be made
With.The main frequency range that 5G wireless communication system will use following two different: the millimeter wave frequency band of 6GHz or less and 6GHz or more.
Since 6GHz or less has the advantages that strong operability and technology maturation, so 6GHz 5G antenna system below will preferentially be made
With.In forth generation mobile communication (4G) system, 2 × 2 multiple-input and multiple-output (MIMO) antenna has been widely studied and has made
In handheld mobile device.According to the result of study of current various countries, for 5G technology compared to for current 4G technology, peak value is fast
Rate will increase decades of times, so, in order to reach the requirement of 5G transmission rate, 4 antenna systems or more will be used, with reality
Now bigger channel capacity and better communication quality.In addition, the mimo antenna structure with multiple antennas can well solve
Multipath fading problem simultaneously promotes data throughout.
Since the space of handheld device such as mobile phone is limited, how designing the antenna of small size will be mimo antenna
The challenge to be faced in system design.Another challenge faced in mimo antenna system be how to design wideband or
The antenna system of multifrequency can cover broader 5G Sub-6GHz frequency range.Currently, Chinese three big operators have obtained entirely
Low-frequency range test frequency uses license in state range 5G.China Telecom obtains the 5G examination of the total 100MHz bandwidth of 3400~3500MHz
Test frequency resource；China Mobile obtains 2515~2675MHz, the total 260MHz bandwidth 5G of 4800~4900MHz frequency range tests frequency
Rate resource, wherein 2515~2575MHz, 2635~2675MHz and 4800~4900MHz frequency range are to increase frequency range newly, 2575~
2635MHz frequency range is to backset China Mobile existing TD-LTE (4G) frequency range；It is total that China Unicom obtains 3500~3600MHz
The 5G test frequency resource of 100MHz bandwidth.So design can cover the mimo antenna system of 5G frequency range in above-mentioned host country at
For research emphasis.In addition, isolation between antennae and envelope correlation coefficient (ECC) all can be right in mimo antenna system
Communication system generates vital influence.
Summary of the invention
The technical problems to be solved by the present invention are: providing a kind of mimo antenna system applied to 5G communication and mobile end
End, can cover multiple frequency ranges.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of three frequency mimo antenna systems applied to 5G communication, including at least four antenna element, the antenna list
Member includes irradiation structure and feed structure, and the irradiation structure includes first level radiation branch, the second horizontal radiation branch, end
Hold radiation branch and the first vertical radiation branch, one end of the first level radiation branch and the described first vertical radiation branch
One end be fixedly connected, one end of second horizontal radiation branch is fixedly connected with the described first vertical radiation branch, described
The first gap, and the length of the first level radiation branch are equipped between first level radiation branch and the second horizontal radiation branch
Angle value is greater than the length value of second horizontal radiation branch, and one end of the end radiation branch and the first level radiate
Branch is fixedly connected far from one end of the first vertical radiation branch, and the first vertical radiation branch is far from first level radiation point
One end of branch is equipped with grounding point；The feed structure includes sequentially connected first level feed branch, the first vertical feed point
Branch, the second horizontal feed branch, the second vertical feed branch and the horizontal feed branch of third, the first level feed branch with
The second gap is equipped between second horizontal feed branch, the horizontal feed branch of third is close to second horizontal radiation branch
Setting, the first level feed branch are equipped with feeding point far from one end of the first vertical feed branch.
Further, the antenna element includes antenna holder, and the irradiation structure and feed structure are respectively arranged at institute
It states on the opposite two sides of antenna holder, and the horizontal feed branch of the third and second horizontal radiation branch are in the day
The thickness direction of line bracket is equipped with overlapping region.
Further, the width value phase of the width value of the first level radiation branch and second horizontal radiation branch
Width value Deng, first gap is 0.5~1.5 times of the width value of the first level radiation branch.
Further, the width value phase of the width value of the first level feed branch and the described second horizontal feed branch
Width value Deng, second gap is 0.5~1.5 times of the width value of the first level feed branch.
Further, the end radiation branch is vertically arranged relative to the first level radiation branch.
Further, the described first vertical radiation branch includes bending part and vertical portion, and the bending part and vertical portion are solid
Fixed connection, and bending part and vertical portion be in angle setting, the first level radiation branch and the second horizontal radiation branch with
The bending part is fixedly connected.
Further, the size of the angle is 90 °.
Further, the operating frequency range of the antenna element is 2.515~2.675GHz, 3.4~3.6GHz and 4.8
~4.9GHz.
Another technical solution that the present invention uses are as follows:
A kind of mobile terminal, including the three frequency mimo antenna systems for being applied to 5G communication.
It further, further include pcb board, the shape of the pcb board is rectangle, and the antenna element is set to the PCB
In the long side of plate.
The beneficial effects of the present invention are: branch's length and the first seam by adjusting irradiation structure and feed structure
The size of gap and the second gap, can make antenna element work 2.515~2.675GHz, 3.4~3.6GHz and 4.8~
Tri- frequency ranges of 4.9GHz；The overall dimensions of antenna element are small and high-efficient, are suitable for the mobile terminals such as mobile phone, have production
The advantages that convenient, at low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the mobile terminal of the embodiment of the present invention one；
Fig. 2 is another structural schematic diagram of the mobile terminal of the embodiment of the present invention one；
Fig. 3 is another structural schematic diagram of the mobile terminal of the embodiment of the present invention one；
Fig. 4 is the enlarged structure schematic diagram in Fig. 1 at A；
Fig. 5 is the side view of the antenna element of the embodiment of the present invention one；
Fig. 6 is another structural schematic diagram of the antenna element of the embodiment of the present invention one；
Fig. 7 is the S parameter figure of 4 × 4MIMO antenna system in Fig. 1；
Fig. 8 is the efficiency chart of 4 × 4MIMO antenna system in Fig. 1；
Fig. 9 is the envelope correlation coefficient (ECC) of 4 × 4MIMO antenna system in Fig. 1；
Figure 10 is current distributing figure of the antenna element work in 2.6GHz of the embodiment of the present invention one；
Figure 11 is current distributing figure of the antenna element work in 3.5GHz of the embodiment of the present invention one；
Figure 12 is current distributing figure of the antenna element work in 4.8GHz of the embodiment of the present invention one.
Label declaration:
1, pcb board；2, antenna element；21, irradiation structure；211, first level radiation branch；212, the second horizontal radiation
Branch；213, end radiation branch；214, the first vertical radiation branch；2141, bending part；2142, vertical portion；215, the first seam
Gap；22, feed structure；221, first level feed branch；222, the first vertical feed branch；223, the second horizontal feed point
Branch；224, the second vertical feed branch；225, the horizontal feed branch of third；226, the second gap；23, antenna holder.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
The most critical design of the present invention is: by the way that the first gap is arranged on irradiation structure and is set on feed structure
The second gap is set, three different frequency ranges of antenna element covering 5G communication can be made, and high-efficient.
Please refer to Fig. 1 to Fig. 6, a kind of three frequency mimo antenna systems applied to 5G communication, including at least four antenna
Unit 2, the antenna element 2 include irradiation structure 21 and feed structure 22, and the irradiation structure 21 is radiated including first level
Branch 211, the second horizontal radiation branch 212, end radiation branch 213 and the first vertical radiation branch 214, the first level
One end of radiation branch 211 is fixedly connected with one end of the described first vertical radiation branch 214, second horizontal radiation branch
212 one end is fixedly connected with the described first vertical radiation branch 214, and the first level radiation branch 211 and second is horizontal
The first gap 215 is equipped between radiation branch 212, and the length value of the first level radiation branch 211 is greater than described second
The length value of horizontal radiation branch 212, one end of the end radiation branch 213 and the first level radiation branch 211 are remote
One end from the first vertical radiation branch 214 is fixedly connected, and the first vertical radiation branch 214 is far from first level radiation point
One end of branch 211 is equipped with grounding point；The feed structure 22 is perpendicular including sequentially connected first level feed branch 221, first
Straight feed branch 222, the second horizontal feed branch 223, the second vertical feed branch 224 and the horizontal feed branch 225 of third, institute
It states and is equipped with the second gap 226 between first level feed branch 221 and the second horizontal feed branch 223, the third level feedback
Electric branch 225 is arranged close to second horizontal radiation branch 212, and the first level feed branch 221 is vertical far from first
One end of feed branch 222 is equipped with feeding point.
As can be seen from the above description, the beneficial effects of the present invention are: the branch by adjusting irradiation structure and feed structure
Length and the size in the first gap and the second gap, can make antenna element work 2.515~2.675GHz, 3.4~
Tri- frequency ranges of 3.6GHz and 4.8~4.9GHz；The overall dimensions of antenna element are small and high-efficient, and it is mobile to be suitable for mobile phone etc.
Terminal has many advantages, such as easy to make, at low cost.
Further, the antenna element 2 includes antenna holder 23, and the irradiation structure 21 and feed structure 22 are set respectively
It is placed on the opposite two sides of the antenna holder 23, and the horizontal feed branch 225 of the third and second horizontal radiation
Branch 212 is equipped with overlapping region on the thickness direction of the antenna holder 23.
Seen from the above description, couple feed can be better achieved in setting overlapping region, by adjusting overlapping region
The impedance matching of the adjustable antenna element of size.
Further, the width of the width value of the first level radiation branch 211 and second horizontal radiation branch 212
Angle value is equal, and the width value in first gap 215 is the 0.5~1.5 of the width value of the first level radiation branch 211
Times.
Seen from the above description, the width value in the first gap can be suitable with the width value of horizontal radiation branch.
Further, the width of the width value of the first level feed branch 221 and the described second horizontal feed branch 223
Angle value is equal, and the width value in second gap 226 is the 0.5~1.5 of the width value of the first level feed branch 221
Times.
Seen from the above description, the width value in the second gap can be suitable with the width value of horizontal feed branch.
Further, the end radiation branch 213 is vertically arranged relative to the first level radiation branch 211.
Further, the described first vertical radiation branch 214 includes bending part 2141 and vertical portion 2142, the bending part
2141 are fixedly connected with vertical portion 2142, and bending part 2141 and vertical portion 2142 are arranged in angle, the first level radiation
Branch 211 and the second horizontal radiation branch 212 are fixedly connected with the bending part 2141.
Seen from the above description, radiating element can be bending structure, and the position of bending is in the first vertical branch.
Further, the size of the angle is 90 °.
Further, the operating frequency range of the antenna element 2 be 2.515~2.675GHz, 3.4~3.6GHz and
4.8~4.9GHz.
Please refer to Fig. 1 to Fig. 3, another technical solution of the present invention are as follows:
A kind of mobile terminal, including the three frequency mimo antenna systems for being applied to 5G communication.
Seen from the above description, antenna system is suitable for the mobile terminals such as mobile phone, at low cost convenient for production.
It further, further include pcb board 1, the shape of the pcb board 1 is rectangle, and the antenna element 2 is set to described
In the long side of pcb board 1.
Please refer to Fig. 1 to Figure 12, the embodiment of the present invention one are as follows:
A kind of mobile terminal, including pcb board 1 and applied to three frequency mimo antenna systems of 5G communication, the three frequencies MIMO
Antenna system includes at least four antenna element 2.In Fig. 1, the number of antenna element 2 is 4, and the shape of the pcb board 1 is
The size of rectangle, the pcb board 1 is 150mm × 75mm × 0.8mm, and the antenna element 2 is set to the long side of the pcb board 1
On, it is set in each long side there are two antenna element 2, short side pair of the antenna element 2 relative to pcb board 1 in two long sides
Claim setting, two antenna elements 2 in each long side are symmetrical structure relative to the midpoint of long side, in same long side
The direction of antenna element 2 is oppositely arranged.In Fig. 2 and Fig. 3, the number of antenna element 2 is 8, in the long side of each pcb board 1
Respectively there are 4 antenna elements 2, the antenna element 2 in each long side is symmetrical arranged relative to the short side of pcb board 1.In Fig. 2, it is located at
The first from left to right antenna element 2 of same long side and second antenna element 2 towards identical, third antenna list
Member 2 and the 4th antenna element 2 towards identical, and second antenna element 2 and third antenna element 2 are oppositely arranged (i.e.
Opening direction is opposite), Fig. 3 the difference from Fig. 2 is that, second antenna element 2 and third antenna element 2 are disposed opposite to each other
(i.e. opening direction is opposite).
As shown in Figure 4 and Figure 5, the antenna element 2 includes irradiation structure 21 and feed structure 22, the irradiation structure 21
Including first level radiation branch 211, the second horizontal radiation branch 212, end radiation branch 213 and the first vertical radiation branch
214, one end of the first level radiation branch 211 is fixedly connected with one end of the described first vertical radiation branch 214, described
One end of second horizontal radiation branch 212 is fixedly connected with the described first vertical radiation branch 214, the first level radiation point
The first gap 215, and the length of the first level radiation branch 211 are equipped between branch 211 and the second horizontal radiation branch 212
Value is greater than the length value of second horizontal radiation branch 212, one end of the end radiation branch 213 and the first level
Radiation branch 211 is fixedly connected far from one end of the first vertical radiation branch 214, and the first vertical radiation branch 214 is separate
One end of first level radiation branch 211 is equipped with grounding point.In the present embodiment, the end radiation branch 213 is relative to described
First level radiation branch 211 is vertically arranged, and the length of end radiation branch 213, which can according to need, to be adjusted.Described
One horizontal radiation branch 211 is arranged in parallel relative to the second horizontal radiation branch 212, and first level radiation branch 211 and
Two horizontal radiation branches 212 are respectively relative to the described first vertical radiation branch 214 and are vertically arranged.Preferably, first water
The width value of flat radiation branch 211 is equal with the width value of second horizontal radiation branch 212, first gap 215
Width value is 0.5~1.5 times of the width value of the first level radiation branch 211, the width value and first in the first gap 215
The width value of horizontal radiation branch 211 can be equal.The feed structure 22 includes sequentially connected first level feed branch
221, the first vertical feed branch 222, the second horizontal feed branch 223, the second vertical feed branch 224 and third level feed
Branch 225 is equipped with the second gap 226 between the first level feed branch 221 and the second horizontal feed branch 223, described
The horizontal feed branch 225 of third is arranged close to second horizontal radiation branch 212, and the first level feed branch 221 is remote
One end from the first vertical feed branch 222 is equipped with feeding point.In the present embodiment, the antenna element 2 includes antenna holder 23,
The irradiation structure 21 and feed structure 22 are respectively arranged on the opposite two sides of the antenna holder 23, and the third water
Flat feed branch 225 is equipped with overlay region with second horizontal radiation branch 212 on the thickness direction of the antenna holder 23
Domain, the direction where the short side of thickness direction, that is, pcb board 1 of antenna holder 23.The first level feed branch 221 relative to
The second horizontal feed branch 223 is arranged in parallel, and the length of first level feed branch 221 and the second horizontal feed branch
223 length is similar, the width of the width value of the first level feed branch 221 and the described second horizontal feed branch 223
Angle value is equal, and the width value in second gap 226 is the 0.5~1.5 of the width value of the first level feed branch 221
Times, the width value in the second gap 226 can be equal with the width value of first level feed branch 221.In the present embodiment, feed knot
The horizontal feed branch of structure 22 is vertically arranged relative to vertical feed branch.When irradiation structure 21 and feed structure 22 are in the day
When on the same side between line, need to readjust the size of irradiation structure 21 and feed structure 22, at this point, third level is presented
Electric branch 225 does not have overlapping region on the thickness direction of antenna holder 23 with second horizontal radiation branch 212.
As shown in fig. 6, the first vertical radiation branch 214 includes 2141 He of bending part in another specific embodiment
Vertical portion 2142, the bending part 2141 are fixedly connected with vertical portion 2142, and bending part 2141 and vertical portion 2142 are in angle
Setting, the first level radiation branch 211 and the second horizontal radiation branch 212 are fixedly connected with the bending part 2141.
Preferably, the size of the angle is 90 °.At this point, the horizontal feed branch 225 of third and second horizontal radiation branch 212
There is no overlapping region on the thickness direction of antenna holder 23.
In another specific embodiment, first level radiation branch 211 is fixedly connected with the bending part 2141, and second
Horizontal radiation branch 212 is fixedly connected with the vertical portion 2142, i.e., bending part is in first level radiation branch 211 and second
In the first vertical radiation branch 214 between horizontal radiation branch 212.
Fig. 7 is the S parameter figure of 4 × 4MIMO antenna system in Fig. 1, and Cong Tuzhong is clear that, antenna-
10dB impedance bandwidth can cover tri- 5G commercialization frequency ranges of 2.515~2.675GHz, 3.4~3.6GHz and 4.8~4.9GHz, and
Isolation between antennas is better than 14dB.(since 4 antenna elements are symmetrical structures, so only giving one of antenna element
S11).
Fig. 8 is the efficiency chart of 4 × 4MIMO antenna system in Fig. 1, it can be seen from the figure that antenna efficiency is above-mentioned three
It is better than 60% in a frequency range.
Fig. 9 is the envelope correlation coefficient (ECC) of 4 × 4MIMO antenna system in Fig. 1, it can be seen from the figure that antenna list
ECC between member is respectively less than 0.05 on working frequency range.
In order to further illustrate the working principle of the mimo antenna system of the present embodiment, Figure 10-Figure 12 gives antenna list
Current distributing figure of the member work at three resonance frequencies.
Figure 10 gives antenna element work in the current distributing figure of 2.6GHz, it can be seen from the figure that electric current mainly divides
Cloth is in the first vertical radiation branch, first level radiation branch and the second horizontal radiation branch.
Figure 11 gives antenna element work in the current distributing figure of 3.5GHz, it can be seen from the figure that current convergence point
Cloth adjusts the resonance of adjustable second resonance of antenna element of branch length of this feed structure in the branch of feed structure
Frequency.
Figure 12 gives antenna element work in the current distributing figure of 4.8GHz, it can be seen from the figure that current convergence point
For cloth in first level radiation branch and the second horizontal radiation branch, this resonance is generated under the action of the first gap.
In conclusion the three frequency mimo antenna systems and mobile terminal provided by the invention applied to 5G communication, aerial system
System can cover 2.515~2.675GHz, 3.4~3.6GHz and 4.8~4.9GHz, tri- frequency ranges well；Antenna element
Overall dimensions it is small and high-efficient, be suitable for the mobile terminals such as mobile phone, have many advantages, such as easy to make, at low cost.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (10)
1. a kind of three frequency mimo antenna systems applied to 5G communication, including at least four antenna element, which is characterized in that institute
Stating antenna element includes irradiation structure and feed structure, and the irradiation structure includes first level radiation branch, the second horizontal spoke
Branch, end radiation branch and the first vertical radiation branch are penetrated, one end of the first level radiation branch is perpendicular with described first
One end of straight radiation branch is fixedly connected, and one end of second horizontal radiation branch is fixed with the described first vertical radiation branch
Connection is equipped with the first gap, and the first level spoke between the first level radiation branch and the second horizontal radiation branch
The length value for penetrating branch is greater than the length value of second horizontal radiation branch, one end of the end radiation branch and described the
One horizontal radiation branch is fixedly connected far from one end of the first vertical radiation branch, and the first vertical radiation branch is far from first
One end of horizontal radiation branch is equipped with grounding point；The feed structure includes sequentially connected first level feed branch, first
Vertical feed branch, the second horizontal feed branch, the second vertical feed branch and the horizontal feed branch of third, the first level
The second gap is equipped between feed branch and the second horizontal feed branch, the horizontal feed branch of third is close to second water
Flat radiation branch setting, the first level feed branch are equipped with feeding point far from one end of the first vertical feed branch.
2. the three frequency mimo antenna systems according to claim 1 applied to 5G communication, which is characterized in that the antenna list
Member includes antenna holder, and the irradiation structure and feed structure are respectively arranged on the opposite two sides of the antenna holder, and
The horizontal feed branch of third is equipped on the thickness direction of the antenna holder Chong Die with second horizontal radiation branch
Region.
3. the three frequency mimo antenna systems according to claim 1 applied to 5G communication, which is characterized in that first water
The width value of flat radiation branch is equal with the width value of second horizontal radiation branch, and the width value in first gap is institute
0.5~1.5 times for stating the width value of first level radiation branch.
4. the three frequency mimo antenna systems according to claim 1 applied to 5G communication, which is characterized in that first water
The width value of flat feed branch is equal with the width value of the described second horizontal feed branch, and the width value in second gap is institute
0.5~1.5 times for stating the width value of first level feed branch.
5. the three frequency mimo antenna systems according to claim 1 applied to 5G communication, which is characterized in that the end spoke
Branch is penetrated to be vertically arranged relative to the first level radiation branch.
6. the three frequency mimo antenna systems according to claim 1 applied to 5G communication, which is characterized in that described first is perpendicular
Straight radiation branch includes bending part and vertical portion, and the bending part is fixedly connected with vertical portion, and bending part and vertical portion are in folder
Angle setting, the first level radiation branch and the second horizontal radiation branch are fixedly connected with the bending part.
7. the three frequency mimo antenna systems according to claim 6 applied to 5G communication, which is characterized in that the angle
Size is 90 °.
8. the three frequency mimo antenna systems according to claim 1 applied to 5G communication, which is characterized in that the antenna list
The operating frequency range of member is 2.515~2.675GHz, 3.4~3.6GHz and 4.8~4.9GHz.
9. a kind of mobile terminal, which is characterized in that three frequencies including being applied to 5G communication described in claim 1-8 any one
Mimo antenna system.
10. mobile terminal according to claim 9, which is characterized in that further include pcb board, the shape of the pcb board is square
Shape, the antenna element are set in the long side of the pcb board.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110931964A (en) * | 2019-10-24 | 2020-03-27 | 广东工业大学 | Miniaturized MIMO multifrequency cell-phone antenna |
| CN112768876A (en) * | 2021-01-04 | 2021-05-07 | 信维创科通信技术（北京）有限公司 | 5G MIMO antenna system based on coupling feed and electronic equipment |
| CN113517565A (en) * | 2021-05-06 | 2021-10-19 | 苏州大学 | Three-frequency MIMO antenna applied to 5G mobile terminal |
| CN113964511A (en) * | 2021-10-21 | 2022-01-21 | 安徽大学 | Zero-clearance 5G ultra-wideband MIMO antenna |
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