CN106921038A - Multi-input/output antenna - Google Patents
Multi-input/output antenna Download PDFInfo
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- CN106921038A CN106921038A CN201510979994.0A CN201510979994A CN106921038A CN 106921038 A CN106921038 A CN 106921038A CN 201510979994 A CN201510979994 A CN 201510979994A CN 106921038 A CN106921038 A CN 106921038A
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- frequency range
- antenna
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- distributing point
- distributing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
-
- 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
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
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Abstract
The invention discloses a kind of mimo antenna, its support is operated in M frequency range, and the mimo antenna includes：First antenna unit and the second antenna element, respectively with M distributing point, 2 M distributing points of antenna element are corresponded with M frequency range respectively, and radio circuit of each distributing point respectively with each self-corresponding frequency range is connected；Mimo antenna also includes decoupling circuit, and the decoupling circuit is connected between first antenna unit and the second antenna element, for reducing the coupling that the first frequency range in M frequency range is produced between first antenna unit and the second antenna element.The mimo antenna of the embodiment of the present invention sets multiple distributing points, so that separate between each frequency range, and the use of wave filter or combiner in radio-frequency channel can be reduced, decoupling circuit is set for a frequency range, design is simple, the isolation between low cost, and each antenna element is higher.
Description
Technical field
The present embodiments relate to field of antenna, and more particularly, to a kind of multiple-input and multiple-output
Mimo antenna.
Background technology
Single-input single-output (Single Input Single Output, SISO) antenna is in terms of channel capacity
With a bottleneck that can not be broken through --- the limitation of Shannon capacity.Under conditions of being limited without size, day
Line number amount is more, and throughput can also be multiplied therewith.Thus, multiple-input and multiple-output has been developed
(Multiple-Input Multiple-Output, MIMO) antenna technology.At present, mimo antenna technology
Have become one of core technology of wireless communication technology.
But for terminal devices such as smart mobile phones, its size is strict limitation.By multiple antenna elements
Concentrate in the limited space of terminal device, very big coupling, the property of mimo antenna will be produced each other
To also can decline therewith.How under limited size, realize in mimo antenna multiple antenna elements it
Between high isolation problem, be mimo antenna design a difficult point.
Existing mimo antenna can generally be operated in multiple frequency ranges.Mimo antenna includes multiple days
Line unit, each antenna element has a single distributing point.Decoupling technique is mostly directed to single feed
The multiple frequency range design decoupling networks of point.Therefore, decoupling network is needed for multiple frequency range designs so that gone
Coupling network is extremely complex.Also, because multiple frequency ranges share a distributing point, between frequency range easily mutually
Influence.Additionally, multiple frequency ranges share a distributing point, in the front end of the corresponding radio circuit of each frequency range,
Wave filter or combiner is needed to use just to can connect to the distributing point of antenna element so that mimo antenna
Cost increase.This causes that the design of mimo antenna is extremely complex, and each antenna in mimo antenna
Isolation between unit is relatively low.
The content of the invention
The embodiment of the present invention provides a kind of mimo antenna, design between simple and each antenna element every
It is higher from spending.
In a first aspect, the invention provides a kind of multiple-input and multiple-output mimo antenna, the MIMO
Antenna supports that, in M band operation, M is more than or equal to 2, and the mimo antenna includes：First day
Line unit, the first antenna unit has M the first distributing points, the M the first distributing point with
The M frequency range is corresponded, each the first distributing point difference in the M the first distributing point
Radio circuit with each self-corresponding frequency range is connected；Second antenna element, second antenna element has
M the second distributing point, the M the second distributing point is corresponded with the M frequency range, the M
The radio circuit of each second distributing point in individual second distributing point respectively with each self-corresponding frequency range is connected；
Decoupling circuit, the decoupling circuit is connected between the first antenna unit and second antenna element,
For reducing the first frequency range in the M frequency range in the first antenna unit and the second antenna list
The coupling produced between unit.
Based on above-mentioned technical proposal, each antenna element of mimo antenna of the invention is set and multiple frequency ranges
One-to-one multiple distributing point so that separate between each frequency range, and radio-frequency channel can be reduced
In wave filter or combiner use, for frequency range, decoupling circuit is set, design is simple, cost
It is low, and isolation between each antenna element is higher.
The coupling produced between above-mentioned first antenna unit and the second antenna element can refer to first antenna unit
And second current coupling produced between antenna element.
Above-mentioned mimo antenna is supported to refer to that mimo antenna supports M work in M band operation
Frequency range, or mimo antenna can be operated in M harmonic wave frequency range.Further, mimo antenna can
So that including many antennas, or multiple antenna elements, each antenna element can support M frequency range.
In a kind of possible implementation, the M the first distributing point and the M individual second feed
Point forms M to distributing point, and the M is in each pair distributing point correspondence M frequency range in distributing point
Same frequency range, first frequency range be the M to distributing point in a pair of closest distributing point institutes
Corresponding frequency range.
It is described in a kind of possible implementation according to first aspect or above-mentioned possible implementation
First frequency range can be the minimum frequency range of frequency in the M frequency range.
In a kind of possible implementation, the first antenna unit has the first earth point, described the
Two antenna elements have the second earth point, and the decoupling circuit can include minor matters and matching device, described
Minor matters are used to for first earth point and second earth point to be connected to earth plate, the minor matters with
The matching device is provided between the earth plate, the matching device is used to cause the minor matters and institute
The first frequency range is stated to match.
This possible implementation, decoupling circuit is that minor matters are arranged between the earth point of antenna element,
Without being disposed between the distributing point of antenna element, thus complicated match circuit need not be set, and
Only need to simply matching device to match with first frequency range so that the design of decoupling circuit becomes letter
List, low cost, decoupling effect are good, and the isolation of mimo antenna is high.
In a kind of possible implementation, the decoupling circuit can be match circuit, for example, can be
Minor matters match circuit.
Wherein it is preferred to, the matching device can be for inductively or capacitively.
In this possible implementation, the minor matters can be T-shaped minor matters or Pi type minor matters.
In this possible implementation, electricity can be provided between the minor matters and first earth point
Perhaps inductance.
In this possible implementation, can also be provided between the minor matters and second earth point
Inductively or capacitively.
In alternatively possible implementation, the decoupling circuit can include being connected to first frequency
Neutralization between corresponding first distributing point of section and corresponding second distributing point of first frequency range
Line.
In this possible implementation, corresponding first distributing point of first frequency range and line is neutralized
Between can be provided with match circuit, for cause it is described neutralization line match with first frequency range.
In this possible implementation, corresponding second distributing point of first frequency range and line is neutralized
Between can also be provided with match circuit, for cause it is described neutralization line match with first frequency range.
In another possible implementation, the decoupling circuit can include being connected to first frequency
Decoupling between corresponding first distributing point of section and corresponding second distributing point of first frequency range
Network.
It should be understood that in the present invention, can by minor matters with match device, neutralize line and three kinds of decoupling network can
The implementation of energy is combined with each other.
In the present invention, M the first radiant body, the M can be included in the first antenna unit
First radiant body is corresponded with the M the first distributing point.
In the present invention, M the second radiant body, the M can be included in second antenna element
Second radiant body is corresponded with the M the second distributing point.
In the present invention, any one frequency range in the M frequency range can be fixed frequency range or frequency band adjustable.
In the present invention, the line of rabbet joint can be provided between the first antenna unit and second antenna element.
It should be understood that can also include removing the first antenna unit and second antenna in mimo antenna
More other antenna elements beyond unit.
In some possible implementations, the structure of first antenna unit and the second antenna element can phase
Together.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to embodiment or existing skill
The accompanying drawing to be used needed for art description is briefly described, it should be apparent that, drawings in the following description
Only some embodiments of the present invention, for those of ordinary skill in the art, are not paying creation
Property work on the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of antenna coupling.
Fig. 2 is a kind of schematic diagram of decoupling technique.
Fig. 3 is the schematic diagram of another decoupling technique.
Fig. 4 is the schematic diagram of another decoupling technique.
Fig. 5 is the schematic diagram of the mimo antenna of one embodiment of the invention.
Fig. 6 is the schematic diagram of the mimo antenna of one embodiment of the invention.
Fig. 7 is the schematic diagram of the fine structure of the T-shaped minor matters of one embodiment of the invention.
Fig. 8 is a schematic diagram for the mimo antenna of specific example.
Fig. 9 is the S parameter figure of the mimo antenna of specific example.
Figure 10 is a schematic diagram for the mimo antenna of specific embodiment of the invention.
Figure 11 is a S parameter figure for the mimo antenna of specific embodiment of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the premise of the property made work, belongs to the scope of protection of the invention.
Some designs of existing mimo antenna are introduced first below.
Due to there are multiple antenna elements in limited space in mimo antenna so that antenna element it
Between produce coupling.Coupling be broadly divided into three kinds, as shown in figure 1, antenna coupling include current coupling, oneself
Coupled by Space Coupling and surface wave.For above-mentioned three kinds couplings, Decoupling Design can be respectively carried out, carried
High-isolation.
Free space is decoupled, and on the one hand can be realized by different polarization modes；Still further aspect can
By the structure of researching antenna unit, the surface current of antenna element is concentrated on into antenna list as far as possible
Near unit, reduce to the coupling of other devices around antenna element to realize.
Surface wave coupling occurs mainly in dielectric layer, when the thickness and wavelength of medium substrate in mimo antenna
Between ratio when reaching certain value, surface wave coupling play a leading role in being coupled at three kinds.By choosing
Selecting suitable dielectric thickness can reduce surface wave coupling.
Under normal circumstances, current coupling is a kind of topmost coupling in mimo antenna.
In a kind of schematic diagram of decoupling technique as shown in Figure 2, M frequency range (F can be operated in1, F2...,
FM) mimo antenna include multiple antenna elements, such as including first antenna unit and the second antenna
Unit.Each antenna element includes a radiant body, an earth point and a distributing point, i.e., each
Antenna element has a single distributing point.Existing decoupling technique is for single distributing point multiple frequency range
Design decoupling network.Therefore, decoupling network is needed for multiple frequency range designs so that decoupling network is very
It is complicated.Also, because multiple frequency ranges share a distributing point, easily influenced each other between frequency range.Additionally,
Multiple frequency ranges share a distributing point, in the front end of the corresponding radio circuit of each frequency range, it is necessary to use filter
Ripple device or combiner just can connect to the distributing point of antenna element.This causes that the design of mimo antenna is non-
It is often complicated, and isolation in mimo antenna between each antenna element is relatively low.
Current coupling is mainly transmitted by earth plate between antenna element, therefore removal current coupling is usual
Carried out on earth plate.In the schematic diagram of another decoupling technique (slot technique) as shown in Figure 3,
Slotted on the earth plate of mimo antenna.Specifically, i.e. mimo antenna as shown in Figure 3
Including first antenna unit and the second antenna element, between first antenna unit and the second antenna element
On earth plate, by opening up the line of rabbet joint of multi-form, by between first antenna unit and the second antenna element
Part couple current be directed at the line of rabbet joint, play a part of trap, hinder first antenna unit and second
The transmission of couple current between antenna element, reduces the coupling between first antenna unit and the second antenna element
Close, so as to improve the isolation between first antenna unit and the second antenna element.Generally, the length of the line of rabbet joint
Degree L is greater than the length on the W sides of antenna element.
Slot technique can only improve isolation for specific frequency range, when the frequency range of mimo antenna changes,
The line of rabbet joint can only be redesigned.Also, slot technique requirement opens a length for L (L on earth plate>W)
The line of rabbet joint just effectively decouple.This is in actual product and impracticable, because on the one hand, due to the line of rabbet joint
Size L is larger, can increase the size of mimo antenna；On the other hand, the layout of the line of rabbet joint is highly susceptible to
The influence of other components around.In addition, prior art can pass through microstrip structure on earth plate, it is real
Existing microstrip bandstop filter, so that the coupling between reducing antenna element.
Other prior art can set neutralization line on the medium substrate of mimo antenna.By neutralizing line
Two distributing points of antenna element of connection, the couple current between antenna element is neutralized, and improves day
Isolation between line unit.In the schematic diagram of another decoupling technique as shown in Figure 4, MIMO days
Line includes first antenna unit and the second antenna element, the portion of electrical current in first antenna unit and second day
All by neutralizing line, so electric current can be neutralised portion of electrical current in line unit on line is neutralized, so that
Reduce the coupling between first antenna unit and the second antenna element.Generally, between distributing point and neutralization line
Needing setting match circuit carries out frequency band match.
However, neutralizing line can only be directed to the frequency range fixed between two antenna elements, different frequency ranges need
The neutralization line of different length.Further, since in existing mimo antenna, multiple frequency ranges share one
Distributing point, the realized decoupling frequency range of neutralization line decoupling is narrow, and multifrequency or broadband decoupling effect are poor.
Fig. 5 is the schematic diagram of the mimo antenna 500 of one embodiment of the invention.Mimo antenna 500
Support is operated in M frequency range (F1, F2..., FM), M is more than or equal to 2, the mimo antenna
500 include：
First antenna unit 510, the first antenna unit 510 has M the first distributing point (P11, P12...,
P1M), the M the first distributing point (P11, P12..., P1M) and the M frequency range (F1, F2...,
FM) correspond, the M the first distributing point (P11, P12..., P1M) in each first feedback
Electric point P1iRespectively with each self-corresponding frequency range FiRadio circuit be connected；
Second antenna element 520, second antenna element 520 has M the second distributing point (P21, P22...,
P2M), the M the second distributing point (P21, P22..., P2M) and the M frequency range (F1, F2...,
FM) correspond, the M the second distributing point (P21, P22..., P2M) in each second feedback
Electric point P2iRespectively with each self-corresponding frequency range FiRadio circuit be connected；
Decoupling circuit 530, the decoupling circuit 530 is connected to the first antenna unit 510 and this second day
Between line unit 520, for reducing the first frequency range F in the M frequency rangeKIn the first antenna unit
The coupling produced between 510 and second antenna element 520.
It should be understood that in the embodiment of the present invention, more antenna lists can also be included in mimo antenna 500
Unit.The main decoupling discussed between first antenna unit 510 and the second antenna element 520 herein, including
The situation of more antenna elements also hereinafter can progressively be launched to discuss.
Each antenna element of the mimo antenna of the embodiment of the present invention sets one-to-one with multiple frequency ranges
Multiple distributing points so that separate between each frequency range, and the wave filter in radio-frequency channel can be reduced
Or the use of combiner, for a frequency range, decoupling circuit is set, design is simple, low cost, and each day
Isolation between line unit is higher.
In embodiments of the present invention, the structure of the antenna element 520 of first antenna unit 510 and second can be with
It is identical can also be different.Preferably, the structure phase of the antenna element 520 of first antenna unit 510 and second
Together.
Specifically, M the first radiant bodies can be included in the first antenna unit 510, the M the
One radiant body is corresponded with the M the first distributing point.Thus different the first radiant body correspondences is different
Frequency range, and then the different distributing point of correspondence.Similarly, M can be included in second antenna element 520
Individual second radiant body, the M the second radiant body is corresponded with the M the second distributing point.
It should be understood that M frequency range (F in the embodiment of the present invention1, F2..., FM) in any one frequently
Section FiCan for fixed frequency range can also frequency band adjustable.Frequency range in the embodiment of the present invention is referred to as humorous
Shake frequency range.
In embodiments of the present invention, the M the first distributing point (P11, P12..., P1M) and the M
Second distributing point (P21, P22..., P2M) M is formed to distributing point, the M is to each pair in distributing point
Distributing point to should be in M frequency range same frequency range, first frequency range FKIt is the M in distributing point
Frequency range corresponding to a pair of closest distributing points.In other words, first frequency range FKIt is the M
Frequency range (F1, F2..., FM) in, frequency range is in corresponding first distributing point of the first antenna unit 510
And the nearest frequency range of distance of the frequency range between corresponding second distributing point of second antenna element 520.
Specifically, any one frequency range Fi, the first distributing point P is corresponded in first antenna unit 5101i,
Correspond to the second distributing point P in the second antenna element 5202i.Therefore, in the He of first antenna unit 510
There is M in second antenna element 520 to the first distributing point and the second distributing point.Determine that M is presented first
In electricity point and the second distributing point, every a pair first distributing point P1iWith the second distributing point P2iDistance, and then
Determine a pair closest first distributing point P1KWith the second distributing point P2K.First distributing point P1K
With the second distributing point P2KCorresponding to the first frequency range FK.And the minor matters 531 of the embodiment of the present invention are then used to drop
Low first frequency range FKThe coupling produced between the first antenna unit 510 and second antenna element 520.
It should be understood that in the case where the distance of corresponding two distributing points of frequency range is fixed, the frequency of frequency range
Rate is lower, and the coupling that it is produced is bigger；In the case where a frequency for frequency range is fixed, corresponding two
The distance of distributing point is nearer, and the coupling that it is produced is bigger.When mimo antenna is designed, first antenna list
Unit 510 and second antenna element 520 position can be as shown in Figure 5 position set.That is, will most
The F of low frequency1Corresponding first distributing point P11With the first distributing point P21The distance of setting is most close, thus
FKIt is F1.That is, the first frequency range FKIt is the M frequency range (F1, F2..., FM) in frequency it is minimum
Frequency range.
In embodiments of the present invention, a kind of preferred scheme is as shown in Figure 6, the first antenna unit 510
With the first earth point G1, second antenna element 520 has the second earth point G2, the decoupling circuit
530 include minor matters 531 and matching device 532, and the minor matters 531 are used for the first earth point G1 and are somebody's turn to do
Second earth point G2 is connected on earth plate 540, is set between the minor matters 531 and the earth plate 540
There is the matching device 532, the matching device 532 is used to cause the minor matters 531 and the first frequency range phase
Match somebody with somebody.
Specifically, the first earth point G1 and second earth point G2 is connected by the minor matters 531
Onto earth plate 540, electric capacity 532 is provided between the minor matters 531 and the earth plate 540.Minor matters 531
Effect be to lead on earth plate the electric current in antenna element, minor matters 531 are only applicable to a kind of solid in itself
Fixed frequency or a very narrow frequency range so that by match device (such as electric capacity 532) by its
Match the first frequency range for wanting decoupling.The minor matters 531 and electric capacity 532 are used to reduce the M frequency range (F1,
F2..., FM) in the first frequency range FKIn the first antenna unit 510 and second antenna element 520
Between produce coupling.
In the embodiment of the present invention, because matching device is connected directly to earth plate, thus setting for device is matched
Meter becomes more simple.Wherein, electric capacity 532 is a kind of concrete implementation for matching device, adaptation
Part can also be inductance, or matching device can also be equivalent circuit of inductance or electric capacity etc., the present invention
Embodiment is not construed as limiting to this.Also, for the number for matching device, the embodiment of the present invention is not construed as limiting.
In embodiments of the present invention, the minor matters 531 can be T-shaped minor matters, or Pi type minor matters.
The minor matters 531 of the embodiment of the present invention are arranged between the earth point of antenna element, rather than antenna element
Between distributing point, thus (decoupling network is arranged at the distributing point of antenna element need not to set match circuit
Between when, two need to be respectively provided with match circuit between distributing point and decoupling network matched), and only need
Device is simply matched to match with the first frequency range so that the design of decoupling circuit become simply, cost
Low, decoupling effect is good, and the isolation of mimo antenna is high.
Fig. 7 is to be illustrated the fine structure at minor matters 531 with T-shaped minor matters.In order to reach decoupling
Purpose, needed between minor matters 531 and earth plate 540 set electric capacity 532.And minor matters 531 connect with first
Electric capacity C2 or inductance can be set between the G1 of place, it is also possible to be not provided with.Similarly, minor matters 531 with should
Electric capacity C3 or inductance can be set between second earth point G2, it is also possible to be not provided with.Example shown in Fig. 7
Electric capacity C2 and electric capacity C3 is provided with son.
When minor matters 531 are Pi type minor matters, similarly, a perpendicular node and earth plate of Pi type minor matters
Need to set electric capacity 532 between 540, also need to set electric capacity between another perpendicular node and earth plate 540.And
Can be set inductively or capacitively between the earth point G1 of minor matters 531 and first, it is also possible to be not provided with.Similarly,
Can be set inductively or capacitively between minor matters 531 and second earth point G2, it is also possible to be not provided with.
In another scheme, the decoupling circuit 530 can include being connected to first frequency range FKCorrespondence
First distributing point P1KWith first frequency range FKCorresponding second distributing point P2KBetween neutralization line.
In this programme, first frequency range FKCorresponding first distributing point P1KAnd neutralize can be between line
Match circuit is provided with, for causing the neutralization line and first frequency range FKMatch.
In this programme, first frequency range FKCorresponding second distributing point P2KAlso may be used and neutralization line between
To be provided with match circuit, for causing the neutralization line and first frequency range FKMatch.
Additionally, removing the first distributing point P1KWith the second distributing point P2KIn addition, M to the first distributing point and
It is any between the first distributing point and the second distributing point, neutralization line can be set in second distributing point.That is,
Neutralization line can be set between first distributing point and the second distributing point corresponding with first distributing point,
Further to reduce the coupling that other frequency ranges are produced between first antenna unit and the second antenna element.
In embodiments of the present invention, the coupling that line is served only between the corresponding distributing point of one frequency range of reduction is neutralized
Close, decoupling effect is good, it is possible to increase the isolation of mimo antenna.
It should be understood that decoupling circuit 530 can include being connected to first frequency range FKCorresponding first feed
Point P1KWith first frequency range FKCorresponding second distributing point P2KBetween decoupling network.
In embodiments of the present invention, decoupling network is served only between the corresponding distributing point of one frequency range of reduction
Coupling so that the design of decoupling network is relatively simple, decoupling effect is good, it is possible to increase mimo antenna
Isolation.
It should be understood that in the embodiment of the present invention, can by minor matters with match the scheme of device, neutralize the side of line
Three kinds of possible schemes of scheme of case and decoupling network are combined with each other.Wherein, each scheme is used in combination
When, its design should match each other.
In embodiments of the present invention, can be combined with the scheme of prior art, the first antenna unit 510
The line of rabbet joint can be provided with and second antenna element 520 between, the embodiment of the present invention is not construed as limiting to this.
Fig. 8 is a kind of schematic diagram of specific mimo antenna 800.Mimo antenna shown in Fig. 8
800 is state when not designing decoupling circuit.Mimo antenna 800 is operated in 2 frequency range F1And F2。
Mimo antenna 800 includes two antenna elements, the antenna element 820 of first antenna unit 810 and second.
Include two radiant bodies in first antenna unit and the second antenna element respectively, respectively corresponding frequency band F1And F2。
First antenna unit has the first distributing point P11, corresponding frequency band F1；First antenna unit has the first feed
Point P12, corresponding frequency band F2.Second antenna element has the second distributing point P21, corresponding frequency band F1；Second
Antenna element has the second distributing point P22, corresponding frequency band F2。
Fig. 9 is the S parameter figure of mimo antenna 800.First distributing point P in first antenna unit11's
Return loss is with curve SARepresent, the first distributing point P in first antenna unit12Return loss with curve
SBRepresent.By curve SAAnd SBIt is appreciated that frequency range F1About 2.2GHz to 2.4GHz, frequency range F2
About 4.2GHz to 4.4GHz.
First distributing point P in first antenna unit11With the first distributing point P12Between isolation be such as Fig. 9
Shown curve SC, its size is more than 15dB.This is primarily due to the first feedback in mimo antenna 800
Electric point P11With the first distributing point P12Corresponding frequency range is different, and the two influences each other smaller.First antenna
First distributing point P in unit12With the second distributing point P in the second antenna element22Between isolation be as figure
Curve S shown in 9D, its size is more than 10dB.This is primarily due to first in mimo antenna 800
Distributing point P12With the second distributing point P22The distance between farther out, the two influences each other also smaller.First day
First distributing point P in line unit11With the second distributing point P in the second antenna element21Between isolation be as
Curve S shown in Fig. 9E, its size is less than 5dB.Therefore, this example is mainly for first antenna unit
In the first distributing point P11With the second distributing point P in the second antenna element21Corresponding frequency range designs minor matters, enters
Row decoupling.
Figure 10 is that the one kind after increasing T-shaped minor matters on the basis of the mimo antenna structure of Fig. 8 is specific
Mimo antenna 1000 schematic diagram.Mimo antenna 1000 shown in Figure 10 is by T-shaped minor matters
1031 and electric capacity 1032 by the first earth point G1 of first antenna unit 1010 and the second antenna element
1020 the second earth point G2 is connected to earth plate 1040.The concrete structure of mimo antenna 1000 with
Embodiments described hereinbefore is consistent, and here is omitted.
Figure 11 is the S parameter figure of mimo antenna 1000.Mimo antenna 1000 after decoupling, the
First distributing point P in one antenna element11With the second distributing point P in the second antenna element21Between isolation
It is curve S as shown in figure 11E, its size by decoupling before 5dB rise to about 10dB.From echo
The curve S of lossA、SBAnd the curve S of isolationC、SDAs can be seen that first antenna unit 1010
With in the second antenna element 1020 except the first distributing point P11With the first distributing point P12Other feeds in addition
Between isolation, be substantially not subject to the first distributing point P11With the first distributing point P12Between decoupling circuit
(T-shaped minor matters) influence.
It should be understood that more antenna elements can be included in mimo antenna.For example, removing first antenna list
Unit, the second antenna element, also including third antenna unit, third antenna unit can be arranged on second day
The right side of line unit, and cause the frequency range F of third antenna unitMCorresponding distributing point and the second antenna list
The frequency range F of unitMCorresponding second distributing point P2MDistance, compared to other to the distance between distributing point
It is nearest.Minor matters between second antenna element and third antenna unit are designed as eliminating frequency range FM
The coupling of generation.
A kind of simple design philosophy is, if mimo antenna includes multiple antenna elements, with every
Two antenna elements are that the first antenna unit and the second antenna element of one group of such as embodiment of the present invention are set
Put.Remote distance is sufficiently spaced-apart between every two groups of antenna elements, to avoid producing coupling as far as possible.
Those of ordinary skill in the art are it is to be appreciated that with reference to each of the embodiments described herein description
The unit and algorithm steps of example, can be with electronic hardware or the knot of computer software and electronic hardware
Close to realize.These functions are performed with hardware or software mode actually, depending on the spy of technical scheme
Fixed application and design constraint.Professional and technical personnel can use not Tongfang to each specific application
Method realizes described function, but this realization it is not considered that beyond the scope of this invention.
It is apparent to those skilled in the art that, it is for convenience and simplicity of description, above-mentioned to retouch
The specific work process of system, device and the unit stated, may be referred to the correspondence in preceding method embodiment
Process, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, device and
Method, can realize by another way.For example, device embodiment described above is only to show
Meaning property, for example, the division of the unit, only a kind of division of logic function can when actually realizing
To there is other dividing mode, such as multiple units or component can be combined or be desirably integrated into another
System, or some features can be ignored, or not perform.It is another, it is shown or discussed each other
Coupling or direct-coupling or communication connection can be the INDIRECT COUPLING of device or unit by some interfaces
Or communication connection, can be electrical, mechanical or other forms.
It is described as separating component illustrate unit can be or may not be it is physically separate, make
For the part that unit shows can be or may not be physical location, you can with positioned at a place,
Or can also be distributed on multiple NEs.Can select according to the actual needs part therein or
Person whole units realize the purpose of this embodiment scheme.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit,
Can also be that unit is individually physically present, it is also possible to which two or more units are integrated in a list
In unit.
If the function is to realize in the form of SFU software functional unit and as independent production marketing or use
When, can store in a computer read/write memory medium.It is of the invention based on such understanding
The part or the part of the technical scheme that technical scheme substantially contributes to prior art in other words can
Embodied with the form of software product, the computer software product is stored in a storage medium,
Be used to including some instructions so that computer equipment (can be personal computer, server, or
Network equipment etc.) perform all or part of step of each embodiment methods described of the invention.And it is foregoing
Storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-Only Memory, ROM),
Random access memory (Random Access Memory, RAM), magnetic disc or CD etc. are various can
With the medium of store program codes.
The above, specific embodiment only of the invention, but protection scope of the present invention do not limit to
In this, any one skilled in the art the invention discloses technical scope in, can be easily
Expect change or replacement, should all be included within the scope of the present invention.Therefore, protection of the invention
Scope should be defined by scope of the claims.
Claims (13)
1. a kind of multiple-input and multiple-output mimo antenna, it is characterised in that the mimo antenna is supported
In M band operation, M is more than or equal to 2, and the mimo antenna includes：
First antenna unit, the first antenna unit has M the first distributing points, the M the
One distributing point is corresponded with the M frequency range, in the M the first distributing points each first
Radio circuit of the distributing point respectively with each self-corresponding frequency range is connected；
Second antenna element, second antenna element has M the second distributing points, the M the
Two distributing points are corresponded with the M frequency range, in the M the second distributing points each second
Radio circuit of the distributing point respectively with each self-corresponding frequency range is connected；
Decoupling circuit, the decoupling circuit is connected to the first antenna unit and second antenna element
Between, for reducing the first frequency range in the M frequency range in the first antenna unit and described second
The coupling produced between antenna element.
2. mimo antenna according to claim 1, it is characterised in that the M first feedback
Electricity point and the M the second distributing point form M to distributing point, and the M is presented each pair in distributing point
Same frequency range in the electricity point correspondence M frequency range, first frequency range is the M in distributing point
A pair of closest distributing points corresponding to frequency range.
3. mimo antenna according to claim 1 and 2, it is characterised in that first frequency
Section is the minimum frequency range of frequency in the M frequency range.
4. mimo antenna according to any one of claim 1 to 3, it is characterised in that institute
First antenna unit is stated with the first earth point, second antenna element has the second earth point,
The decoupling circuit include minor matters and matching device, the minor matters be used for will first earth point with
Second earth point is connected on earth plate, and described is provided between the minor matters and the earth plate
With device, the matching device is used to cause that the minor matters match with first frequency range.
5. mimo antenna according to claim 4, it is characterised in that the matching device is
Inductively or capacitively.
6. the mimo antenna according to claim 4 or 5, it is characterised in that the minor matters are T
Type minor matters or Pi type minor matters.
7. the mimo antenna according to any one of claim 4 to 6, it is characterised in that institute
State and be provided with inductively or capacitively between minor matters and first earth point.
8. the mimo antenna according to any one of claim 4 to 7, it is characterised in that institute
State and be provided with inductively or capacitively between minor matters and second earth point.
9. mimo antenna according to any one of claim 1 to 8, it is characterised in that institute
Stating decoupling circuit includes being connected to corresponding first distributing point of first frequency range and first frequency range
Neutralization line between corresponding second distributing point.
10. mimo antenna according to any one of claim 1 to 9, it is characterised in that institute
Stating first antenna unit includes M the first radiant body, and the M the first radiant body is individual with the M
First distributing point is corresponded.
11. mimo antennas according to any one of claim 1 to 10, it is characterised in that institute
Stating the second antenna element includes M the second radiant body, and the M the second radiant body is individual with the M
Second distributing point is corresponded.
12. mimo antenna according to any one of claim 1 to 11, it is characterised in that institute
It is fixed frequency range or frequency band adjustable to state any one frequency range in M frequency range.
13. mimo antenna according to any one of claim 1 to 12, it is characterised in that
The line of rabbet joint is provided between the first antenna unit and second antenna element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979994.0A CN106921038A (en) | 2015-12-24 | 2015-12-24 | Multi-input/output antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979994.0A CN106921038A (en) | 2015-12-24 | 2015-12-24 | Multi-input/output antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106921038A true CN106921038A (en) | 2017-07-04 |
Family
ID=59456766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510979994.0A Pending CN106921038A (en) | 2015-12-24 | 2015-12-24 | Multi-input/output antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106921038A (en) |
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| CN106935952A (en) * | 2015-12-30 | 2017-07-07 | 华为技术有限公司 | Dual polarized antenna and communication equipment |
| CN107768811A (en) * | 2017-10-09 | 2018-03-06 | 青岛海信移动通信技术股份有限公司 | A kind of slot antenna and mobile terminal |
| CN108063312A (en) * | 2017-11-02 | 2018-05-22 | 北京理工大学 | A kind of mobile terminal wideband MIMO double antenna |
| CN108172996A (en) * | 2017-12-27 | 2018-06-15 | 维沃移动通信有限公司 | A kind of mobile radio terminal |
| CN108281766A (en) * | 2018-01-19 | 2018-07-13 | 广东欧珀移动通信有限公司 | Antenna assembly and electronic equipment |
| CN108417968A (en) * | 2018-02-27 | 2018-08-17 | 厦门美图移动科技有限公司 | Antenna structure and electronic equipment |
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| WO2022111409A1 (en) * | 2020-11-24 | 2022-06-02 | 华为技术有限公司 | Multi-input multi-output (mimo) antenna and communication device |
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| CN106935952B (en) * | 2015-12-30 | 2020-02-21 | 华为技术有限公司 | Dual-polarized antenna and communication device |
| CN107768811A (en) * | 2017-10-09 | 2018-03-06 | 青岛海信移动通信技术股份有限公司 | A kind of slot antenna and mobile terminal |
| CN107768811B (en) * | 2017-10-09 | 2020-10-02 | 青岛海信移动通信技术股份有限公司 | Slot antenna and mobile terminal |
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| CN112997359A (en) * | 2018-12-17 | 2021-06-18 | 华为技术有限公司 | Antenna array electromagnetic decoupling method and structure |
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Application publication date: 20170704 |