CN209626408U - Double frequency mimo antenna system and mobile terminal applied to 5G communication - Google Patents
Double frequency mimo antenna system and mobile terminal applied to 5G communication Download PDFInfo
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- CN209626408U CN209626408U CN201920268005.0U CN201920268005U CN209626408U CN 209626408 U CN209626408 U CN 209626408U CN 201920268005 U CN201920268005 U CN 201920268005U CN 209626408 U CN209626408 U CN 209626408U
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Abstract
The utility model discloses a kind of double frequency mimo antenna systems and mobile terminal applied to 5G communication, antenna system antenna element, antenna element includes radiating element and feed element, radiating element includes first level branch, second horizontal branch, end branch and the first vertical branch, first level branch one end is fixedly connected with one end of the first vertical branch, it is fixedly connected in the middle part of one end of second horizontal branch and the first vertical branch, the length value of first level branch is greater than the length value of the second horizontal branch, one end of end branch is fixedly connected with first level branch far from one end of the first vertical branch；Feed element includes third horizontal branch and the second vertical branch, and third horizontal branch is arranged close to the second horizontal branch.Antenna system can cover two frequency ranges of 3.3~3.6GHz and 4.8~5GHz well, and the isolation between antenna element is good and compact-sized, occupy little space.
Description
Technical field
The utility model relates to antenna technical field more particularly to a kind of double frequency MIMO aerial systems applied to 5G communication
System and mobile 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 of 6GHz or less and 6GHz or more
Section.Since 6GHz or less has the advantages that strong operability and technology maturation, so 6GHz 5G antenna system below will be excellent
First use.In forth generation mobile communication (4G) system, 2 × 2 multiple-input and multiple-output (MIMO) antenna has been widely studied
And use is in handheld mobile device.The result of study of various countries shows the 5G communication technology and current 4G communication technology phase at present
Than, peak rate will increase decades of times, so, in order to reach the requirement of 5G transmission rate, with more antennas number
MIMO antenna system, such as 8 × 8 mimo antenna system will be applied to handheld device, with realize bigger channel capacity and
Better communication quality.In addition, the mimo antenna system with multi-antenna-unit can well solve multipath fading problem simultaneously
Promote data throughout.
On November 9th, 2017, national Ministry of Industry and Information announce 5G frequency range, plan that 3.3~3.6GHz and 4.8~5GHz frequency range make
For the working frequency range of 5G antenna system, wherein used in 3.3~3.4GHz frequency range principle upper limit room.
Since the space of handheld device such as mobile phone is limited, more antennas will bring the deterioration of isolation between antennas,
In mimo antenna system, isolation between antennae and envelope correlation coefficient (ECC) will (for example system be believed to communication system
Road capacity) generate vital influence.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of double frequency MIMO aerial systems applied to 5G communication
System and mobile terminal, isolation are good.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows:
A kind of double frequency mimo antenna system applied to 5G communication, including at least four antenna element, the antenna list
Member includes radiating element and L-shaped feed element, and the radiating element includes first level branch, the second horizontal branch, end
Branch and the first vertical branch, first level branch one end is fixedly connected with one end of the described first vertical branch, described
It is fixedly connected in the middle part of one end of second horizontal branch and the described first vertical branch, the length value of the first level branch is big
In the length value of second horizontal branch, one end of the end branch and the first level branch are far from first vertical point
One end of branch is fixedly connected, and the first vertical branch is equipped with grounding point far from one end of first level branch；The feed is single
Member includes third horizontal branch and the second vertical branch, and the third horizontal branch is arranged close to second horizontal branch, institute
It states the second vertical branch and is equipped with feeding point far from one end of third horizontal branch.
Further, the antenna element further includes antenna holder, and the radiating element and feed element are respectively arranged at
On the antenna holder.
Further, the radiating element and feed element are located on the opposite two sides of the antenna holder, institute
It states the second horizontal branch and the third horizontal branch and is equipped with overlapping region on the thickness direction of the antenna holder.
Further, the end branch is vertically arranged relative to the first level branch.
Further, the described first vertical branch includes bending part and vertical portion, the fixed company of the bending part and vertical portion
It connects, and bending part and vertical portion are arranged in angle, the first level branch is fixedly connected with the bending part, second water
Divide branch equally to be fixedly connected with the vertical portion.
Further, the size of the angle is 90 °.
Further, the operating frequency range of the antenna element is respectively 3.3~3.6GHz and 4.8~5GHz.
Another technical solution that the utility model uses are as follows:
A kind of mobile terminal, including the double frequency mimo antenna system 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.
Further, the number of the antenna element is eight.
The utility model has the beneficial effects that: by adjusting first level branch, the second horizontal branch and end branch
Length, first level branch between the second horizontal branch at a distance from and the branch length of feed element etc., can be well
Two frequency ranges of 3.3~3.6GHz and 4.8~5GHz are covered, antenna list can be made by adjusting the position and direction of antenna element
Isolation between member is good, and antenna element is compact-sized, occupies little space.The antenna system of the utility model is suitable for mobile phone
Equal mobile terminals, it is at low cost convenient for production.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the mobile terminal of the utility model embodiment one；
Fig. 2 is the side view of the double frequency mimo antenna system of the utility model embodiment one；
Fig. 3 is the enlarged structure schematic diagram in Fig. 1 at A；
Fig. 4 is the enlarged structure schematic diagram in Fig. 2 at B；
Fig. 5 is another overall structure diagram of the antenna element of the utility model embodiment one；
Fig. 6 is the S parameter figure of the double frequency mimo antenna system in Fig. 1；
Fig. 7 is the gross efficiency figure of the double frequency mimo antenna system of the utility model embodiment one；
Fig. 8 is the envelope correlation coefficient result of the double frequency mimo antenna system of the utility model embodiment one；
Fig. 9 is the channel capacity result of the double frequency mimo antenna system of the utility model embodiment one；
Figure 10 is the current distributing figure that the antenna element of the utility model embodiment one works in 3.5GHz；
Figure 11 is the current distributing figure that the antenna element of the utility model embodiment one works in 4.9GHz；
Figure 12 is another side view of double frequency mimo antenna system of the utility model embodiment one；
Figure 13 is another side view of double frequency mimo antenna system of the utility model embodiment one；
Figure 14 is the isolation degree test result of the different double frequency mimo antenna systems of the utility model embodiment one.
Label declaration:
1, pcb board；2, antenna element；21, first level branch；22, the second horizontal branch；23, end branch；24,
One vertical branch；25, third horizontal branch；26, the second vertical branch；27, antenna holder；241, bending part；242, vertical portion.
Specific embodiment
For technology contents, the objects and the effects that the utility model is described in detail, below in conjunction with embodiment and match
Attached drawing is closed to be explained.
The design of the utility model most critical is: antenna element includes the radiating element and L shape of a similar F shape
Feed element can cover two frequency ranges of 3.3~3.6GHz and 4.8~5GHz, and the isolation between antenna element well
It is good.
Please refer to Fig. 1 to Fig. 5, a kind of double frequency mimo antenna system applied to 5G communication, including at least four antenna
Unit 2, the antenna element 2 include radiating element and L-shaped feed element, and the radiating element includes first level branch
21, the second horizontal branch 22, end branch 23 and the first vertical branch 24, described 21 one end of first level branch and described first
One end of vertical branch 24 is fixedly connected, and the middle part of one end of second horizontal branch 22 and the described first vertical branch 24 is solid
Fixed connection, the length value of the first level branch 21 are greater than the length value of second horizontal branch 22, the end branch
23 one end is fixedly connected with the first level branch 21 far from one end of the first vertical branch 24, the first vertical branch
24 one end far from first level branch 21 are equipped with grounding point；The feed element includes that third horizontal branch 25 and second are vertical
Branch 26, the third horizontal branch 25 are arranged close to second horizontal branch 22, and the second vertical branch 26 is far from
One end of three horizontal branch 25 is equipped with feeding point.
As can be seen from the above description, the utility model has the beneficial effects that: by adjusting first level branch, the second level
The length of branch and end branch, first level branch between the second horizontal branch at a distance from and feed element branch head
Degree etc., can cover two frequency ranges of 3.3~3.6GHz and 4.8~5GHz, well by adjusting the position and side of antenna element
It is good to the isolation that can make between antenna element, and antenna element is compact-sized, occupies little space.
Further, the antenna element 2 further includes antenna holder 27, and the radiating element and feed element are respectively set
In on the antenna holder 27.
Seen from the above description, the material of antenna holder, which can according to need, is selected, and can be FR-4 material, can also
Be can laser carvingization plating plastic rubber bracket or LCP material.
Further, the radiating element and feed element are located on the opposite two sides of the antenna holder 27,
Second horizontal branch 22 is equipped with overlay region with the third horizontal branch 25 on the thickness direction of the antenna holder 27
Domain.
Seen from the above description, the size of overlapping region, which can according to need, is adjusted, setting overlapping region be convenient for into
Row couple feed.
Further, the end branch 23 is vertically arranged relative to the first level branch 21.
Further, the described first vertical branch 24 includes bending part 241 and vertical portion 242, the bending part 241 with it is perpendicular
Straight portion 242 is fixedly connected, and bending part 241 and vertical portion 242 are arranged in angle, the first level branch 21 and the bending
Portion 241 is fixedly connected, and second horizontal branch 22 is fixedly connected with the vertical portion 242.
Seen from the above description, radiating element can be bending structure, and the position of bending is in the first vertical branch 24.
Further, the size of the angle is 90 °.
Further, the operating frequency range of the antenna element 2 is respectively 3.3~3.6GHz and 4.8~5GHz.
Please refer to Fig. 1, the utility model relates to another technical solution are as follows:
A kind of mobile terminal, including the double frequency mimo antenna system for being applied to 5G communication.
Seen from the above description, linear system 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.
Further, the number of the antenna element 2 is eight.
Seen from the above description, can be set four antenna elements in each long side, each antenna element it is specific
Modes of emplacement, which can according to need, to be adjusted.
Please refer to Fig. 1 to Figure 14, the embodiments of the present invention one are as follows:
A kind of mobile terminal, as shown in Figure 1, including pcb board 1 and the double frequency MIMO antenna system applied to 5G communication, institute
State the antenna element 2 that double frequency mimo antenna system includes at least four, in the present embodiment, the number of antenna element 2 is eight, institute
The shape for stating pcb board 1 is rectangle, and the size of the pcb board 1 is 150mm × 75mm, and the antenna element 2 is set to the PCB
In the long side of plate 1, set in each long side there are four antenna element 2, the antenna element 2 in two long sides is relative to pcb board 1
Short side be symmetrical arranged.As shown in Fig. 2, four antenna elements 2 in each long side are symmetrical junction relative to the midpoint of long side
Structure.Specifically, first antenna element 2 from left to right and second antenna element 2 towards identical, third antenna element
2 and the 4th antenna element 2 towards identical, and second antenna element 2 and third antenna element 2 are disposed opposite to each other and (open
Mouth direction is opposite).
As shown in Figure 3 and Figure 4, the antenna element 2 includes radiating element and L-shaped feed element, the radiating element
Including first level branch 21, the second horizontal branch 22, end branch 23 and the first vertical branch 24, the first level branch
21 one end are fixedly connected with one end of the described first vertical branch 24, and one end of second horizontal branch 22 is perpendicular with described first
The middle part of straight branch 24 is fixedly connected, and the length value of the first level branch 21 is greater than the length of second horizontal branch 22
Value, one end of the end branch 23 are fixedly connected with the first level branch 21 far from one end of the first vertical branch 24,
Preferably, the end branch 23 is vertically arranged relative to the first level branch 21, and the first vertical branch 24 is separate
One end of first level branch 21 is equipped with grounding point.The feed element includes third horizontal branch 25 and the second vertical branch
26, the third horizontal branch 25 is arranged close to second horizontal branch 22, and the second vertical branch 26 is far from third water
The one end for dividing branch 25 equally is equipped with feeding point, can connect microstrip line at feeding point or coaxial line realizes electrical connection.The present embodiment
In, the antenna element 2 further includes antenna holder 27, and the radiating element and feed element are respectively arranged at the antenna holder
On 27.Preferably, the radiating element and feed element are located on the opposite two sides of the antenna holder 27, and described
Two horizontal branch 22 are equipped with overlapping region, overlapping with the third horizontal branch 25 on the thickness direction of the antenna holder 27
The size in region, which can according to need, to be adjusted.In the present embodiment, the thickness direction of antenna holder 27 is the short of pcb board 1
Direction where side, first level branch 21 and the second horizontal branch 22 are respectively relative to the first vertical branch 24 and are vertically arranged,
First level branch 21 and the second horizontal branch 22 are arranged in parallel.When antenna element 2 need to be arranged in mobile terminal it is specific
When position, first level branch 21 and the second horizontal branch 22 are not necessarily parallel to each other, can there is the variation of certain angle.
As shown in figure 5, the first vertical branch 24 is including bending part 241 and vertically in another specific embodiment
Portion 242, the bending part 241 are fixedly connected with vertical portion 242, and bending part 241 and vertical portion 242 are arranged in angle, described
First level branch 21 is fixedly connected with the bending part 241, second horizontal branch 22 and the fixed company in the vertical portion 242
It connects.Preferably, the size of the angle is 90 °.At this point, second horizontal branch 22 is with the third horizontal branch 25 in institute
It states and is still equipped with overlapping region on the thickness direction of antenna holder 27.
Fig. 6 is the S parameter figure of the double frequency mimo antenna system in Fig. 1, it can be seen from the figure that antenna system can be fine
Ground covers the frequency range of 3.3~3.6GHz and 4.8~5GHz, and the isolation between antenna element in low frequency (3.3~3.6GHz) and
High frequency (4.8~5GHz) is superior to 15dB, has good isolation performance.(since antenna element is about the symmetrical of pcb board
Structure, so only giving necessary S parameter).
Fig. 7 be double frequency mimo antenna system gross efficiency figure, it can be seen from the figure that antenna element low frequency (3.3~
Gross efficiency 3.6GHz) is higher than 60%, is above 50% in the gross efficiency of high frequency (4.8~5GHz).Antenna 1 in figure refers to
First antenna element in Fig. 2 from left to right, antenna 2 refer to second antenna element in Fig. 2 from left to right.
Fig. 8 is the envelope correlation coefficient (ECC) of double frequency mimo antenna system, it can be seen from the figure that between antenna element
ECC is respectively less than 0.06 on working frequency range.Antenna 1 in figure refers to first antenna element in Fig. 2 from left to right, antenna
2 refer to that second antenna element in Fig. 2 from left to right, antenna 3 refer to the third antenna list in Fig. 2 from left to right
Member.
Channel capacity is to measure the key parameter of mimo antenna system, when calculating the channel capacity of mimo antenna, antenna
Efficiency should be included in operation.It is assumed that receiving end antenna be it is irrelevant and lossless, the unit 8 mimo antenna of the present embodiment is filled
Work as transmitting antenna, that is, may make up the mimo transmission system that one 8 hair 8 receives (8 × 8).Assuming that transmission power allocation strategy is to wait function
Rate distribution, channel are independent identically distributed rayleigh fading channel, and channel state information is unknown, and received signal to noise ratio (SNR) is
20dB.Fig. 9 is the channel capacity of 8 × 8MIMO of double frequency antenna system, this is the result is that seek 10000 accidental channel capacity samples
It is desired.It can be seen from the figure that this mimo antenna system is greater than 34bps/Hz in the band channels capacity to be worked,
And the channel capacity of ideal 8 × 8MIMO antenna system is 44bps/Hz, so the mimo antenna system of the present embodiment is well suited for
It is used in the terminal of 5th third-generation mobile communication.
In order to further illustrate the working principle of the mimo antenna system of the present embodiment, day is set forth in Figure 10 and Figure 11
Current distributing figure of the line cell operation in the center frequency point of low frequency and high frequency.It can be seen from the figure that antenna element work exists
When 3.45GHz, electric current is mainly distributed in the first vertical branch and first level branch and end branch.And antenna high frequency treatment
(4.9GHz) work when electric current be mainly distributed on the second horizontal branch, the middle and upper part of the first vertical branch, first level branch with
And in end branch.
In order to be better described the present embodiment mimo antenna superiority, give two kinds of its other party in Figure 12 and Figure 13
The antenna arrangement scheme of formula, the identical position relative to pcb board of the aerial position of three kinds of schemes is identical, but the direction of antenna element
It is different.In Figure 12, the antenna element of the directions of all antenna elements and in Fig. 2 it is contrary.In Figure 13, first antenna
Contrary, second antenna element and the third of antenna element in the direction and Fig. 2 of unit and the 4th antenna element
The direction of antenna element is identical as the direction of the antenna element in Fig. 2.Figure 14 gives the antenna element of 3 kinds of different arrangement forms
Between isolation degree test as a result, this case antenna indicates the antenna system in Fig. 2, scheme 1 indicates the antenna system in Figure 12, scheme
2 indicate the antenna system in Figure 13.It can be seen from the figure that this case antenna element interval is better than 15dB from degree, and in scheme 1
S12 and S23 are worse than 12dB.In scheme 2, although S23 is relatively preferable, S12 is in low frequency only less than 10dB.So In
In the unit 8 mimo system of such form, the arrangement mode in Fig. 2 is to guarantee best choosing of the antenna element interval from degree balance
It selects.
Antenna of the present embodiment only to work in required 6GHz working frequency range below is analyzed and has been described, still
The antenna design principles of the present embodiment extend also to other 5G working frequency range and others m × n, and (m and n are greater than 2
Integer) in mimo antenna system.Meanwhile any pair of this case description antenna it is relevant deformation (such as by first level branch with
Second horizontal branch bends certain angle inwardly, and such as 90 °, as shown in Figure 5) all will be within the protection scope of this case.
In conclusion provided by the utility model a kind of whole applied to the double frequency mimo antenna system of 5G communication and movement
End, can cover two frequency ranges of 3.3~3.6GHz and 4.8~5GHz, the isolation between antenna element is good, and structure well
It is compact, it occupies little space.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalents made based on the specification and figures of the utility model are applied directly or indirectly in relevant technology neck
Domain is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of double frequency mimo antenna system applied to 5G communication, including at least four antenna element, which is characterized in that institute
Stating antenna element includes radiating element and L-shaped feed element, and the radiating element includes first level branch, second horizontal point
One end of branch, end branch and the first vertical branch, first level branch one end and the described first vertical branch is fixed to be connected
It connects, is fixedly connected in the middle part of one end of second horizontal branch and the described first vertical branch, the first level branch
Length value is greater than the length value of second horizontal branch, and one end of the end branch and the first level branch are far from the
One end of one vertical branch is fixedly connected, and the first vertical branch is equipped with grounding point far from one end of first level branch；Institute
Stating feed element includes third horizontal branch and the second vertical branch, and the third horizontal branch is close to second horizontal branch
Setting, the second vertical branch are equipped with feeding point far from one end of third horizontal branch.
2. the double frequency mimo antenna system according to claim 1 applied to 5G communication, which is characterized in that the antenna list
Member further includes antenna holder, and the radiating element and feed element are respectively arranged on the antenna holder.
3. the double frequency mimo antenna system according to claim 2 applied to 5G communication, which is characterized in that the radiation is single
Member and feed element are located on the opposite two sides of the antenna holder, second horizontal branch and third level
Branch is equipped with overlapping region on the thickness direction of the antenna holder.
4. the double frequency mimo antenna system according to claim 1 applied to 5G communication, which is characterized in that the end point
Branch is vertically arranged relative to the first level branch.
5. the double frequency mimo antenna system according to claim 1 applied to 5G communication, which is characterized in that described first is perpendicular
Straight branch includes bending part and vertical portion, and the bending part is fixedly connected with vertical portion, and bending part and vertical portion are set in angle
It sets, the first level branch is fixedly connected with the bending part, and second horizontal branch is fixedly connected with the vertical portion.
6. the double frequency mimo antenna system according to claim 5 applied to 5G communication, which is characterized in that the angle
Size is 90 °.
7. the double frequency mimo antenna system according to claim 1 applied to 5G communication, which is characterized in that the antenna list
The operating frequency range of member is respectively 3.3~3.6GHz and 4.8~5GHz.
8. a kind of mobile terminal, which is characterized in that the double frequency including being applied to 5G communication described in claim 1-7 any one
Mimo antenna system.
9. mobile terminal according to claim 8, 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.
10. mobile terminal according to claim 9, which is characterized in that the number of the antenna element is eight.
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| CN201920268005.0U CN209626408U (en) | 2019-03-01 | 2019-03-01 | Double frequency mimo antenna system and mobile terminal applied to 5G communication |
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| CN201920268005.0U CN209626408U (en) | 2019-03-01 | 2019-03-01 | Double frequency mimo antenna system and mobile terminal applied to 5G communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109860979A (en) * | 2019-03-01 | 2019-06-07 | 深圳市信维通信股份有限公司 | Double frequency mimo antenna system and mobile terminal applied to 5G communication |
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2019
- 2019-03-01 CN CN201920268005.0U patent/CN209626408U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109860979A (en) * | 2019-03-01 | 2019-06-07 | 深圳市信维通信股份有限公司 | Double frequency mimo antenna system and mobile terminal applied to 5G communication |
| CN109860979B (en) * | 2019-03-01 | 2024-05-03 | 深圳市信维通信股份有限公司 | Mobile terminal applied to 5G communication |
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