CN106532261A - Decoupling device and method for reducing antenna coupling in multi-antenna system - Google Patents
Decoupling device and method for reducing antenna coupling in multi-antenna system Download PDFInfo
- Publication number
- CN106532261A CN106532261A CN201610912063.3A CN201610912063A CN106532261A CN 106532261 A CN106532261 A CN 106532261A CN 201610912063 A CN201610912063 A CN 201610912063A CN 106532261 A CN106532261 A CN 106532261A
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- Prior art keywords
- antenna
- passive
- antennas
- uncoupling device
- multiaerial system
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
Abstract
The invention discloses a decoupling device and a method for reducing antenna coupling in a multi-antenna system. The multi-antenna system comprises at least two antennas connected with a transceiver. The decoupling device comprises at least one parasitic antenna placed among the antennas in the multi-antenna system; and each parasitic antenna is in end connection with a load respectively. According to the coupling state between antennas in the original multi-antenna system, the relative positions, the shapes, the resonant frequencies and the end connection load numerical values of the multiple parasitic antennas are adjusted, and thus, coupling between any antennas between more than two multi-antenna systems in the same frequency band or the similar frequency band can be obviously reduced. The mutual interference between the antennas can be reduced, the signal-to-noise ratio of the system is improved, the throughput and the reliability of communication are enhanced and the time delay is reduced. The device and the method provided by the invention are particularly suitable for a full-duplex transmitting and receiving, carrier aggregation and large-scale multiple-input multiple-output antenna system required by a new-generation mobile communication system.
Description
Technical field
It is the present invention relates to wireless communication technology field more particularly to a kind of for reducing antenna coupling in multiaerial system
Uncoupling device and method.
Background technology
Kownledge economy based on information technology is one of most important two big economic field in the world now, wherein with
Five third-generation mobile communications (5G) are the new revolution of the positive solicited message industry of the leading communication technology, be increasingly becoming international competition focus and
One of commanding elevation.5G technologies can bring up to more than 1000 times of forth generation mobile technology networking speed, be capable of achieving high-quality
Three-dimensional data and image transmitting, it is desirable to have bigger communication bandwidth and the availability of frequency spectrum.In this case, extensive MIMO
(Massive MIMO) multi-antenna technology becomes current study hotspot.MIMO technology is using setting up in transmitting terminal and receiving terminal
The multiple spatial channel that multiple antennas are realized sends and receives data, increases the availability of frequency spectrum in the case where system bandwidth is not increased,
The transfer rate of system can be effectively improved；The technology communicates with 5G is improved for the present situation that alleviation is becoming tight radio spectrum resources day
Systematic function has far-reaching significance.
Although mimo system is in the ideal case, channel capacity can linearly increasing with number of antennas (power and bandwidth be solid
It is fixed).But in the implementation, due to the restriction of real space, antenna element separation often not enough half-wavelength, so as to the correlation of channel
Become strong, signal to noise ratio is deteriorated, antenna efficiency declines, cause actual channel capacity and throughput to reduce.On the other hand, less
Away from coupling unnecessary between resonant element can be introduced, so as to change its directional diagram, be not suitable for the group battle array of extensive MIMO.Therefore
Effective multiple antenna decoupling how is realized in smaller size smaller, its correlation is reduced, and is obtained diversity gain and is improved letter
Road capacity has become the hot issue that academia and industrial quarters are paid close attention to jointly.
The content of the invention
For overcoming the shortcomings and deficiencies of above-mentioned prior art, the present invention to provide a kind of for reducing antenna in multiaerial system
The uncoupling device and method of coupling, realizes effective multiple antenna decoupling in smaller size smaller, reduces its correlation.
The technical scheme is that：
A kind of uncoupling device for reducing antenna coupling in multiaerial system, the multiaerial system include at least two
The antenna of individual connection transceiver, the uncoupling device include that at least one is individually positioned in multiaerial system between each antenna
Passive antenna, each passive antenna be terminated with respectively load.
Preferably, the passive antenna be monopole, inverse-F antenna, loop aerial, one or more in microstrip antenna
Combination.
Preferably, the load is open circuited transmission line, short-circuited transmission line, ground capacity, grounded inductor, LC series resonances time
The combination of one or more in road.
Preferably, the multiaerial system be extensive MIMO multi-antenna arrays, router antenna, antenna for mobile phone, data
One kind in card antenna.
Preferably, the extensive MIMO multi-antenna arrays are arranged by the square submatrix of Unit four, in corresponding each submatrix
Four passive antennas are set, and each passive antenna is separately positioned on the inner side in square four sidelines.
Preferably, the extensive MIMO multi-antenna arrays are arranged by three elementary triangle submatrixs, corresponding each submatrix
Triangle on the inside of arrange a passive antenna.
Preferably, the extensive MIMO multi-antenna arrays are arranged by the linear submatrix of Unit four, in corresponding each submatrix
Three passive antennas are set, and each passive antenna is separately positioned between two neighboring primary antenna unit.
Preferably, each antenna of many days systems is provided with matching network so that add the parasitic day of terminating load
After linear array, the matching status of former multiaerial system do not change.
Present invention also offers a kind of decoupling method for reducing the uncoupling device of antenna coupling in multiaerial system,
Including：The admittance matrix of the array constituted containing multiaerial system and passive antenna system is extracted, by adjusting passive antenna
Transadmittance between self-admittance, and passive antenna and passive antenna and multiaerial system between, and passive antenna termination
Load admittance so that the transadmittance between the one or more pairs of antennas of multiaerial system is little as far as possible, mutual coupling are less than 25dB.
Further, form and the numerical value of the load terminated on the passive antenna body are set, further reduce institute
The mutual coupling stated between the one or more pairs of antennas of multiaerial system is bonded to below 30dB.
Further, the match circuit of the multiaerial system is set so that after adding passive antenna, many days of the original
The matching status of linear system system antenna element do not occur to deteriorate.
Compared with prior art, beneficial effects of the present invention：
The present invention provides a kind of uncoupling device and method for reducing antenna coupling in multiaerial system, in multiple antennas
Place passive antenna in system between each antenna respectively, each passive antenna is terminated with load respectively, according to original multiple antennas system
Couple state in system between each antenna, adjusts the relative position of the plurality of passive antenna, shape, resonant frequency and described
The numerical value of terminating load, can significantly reduce between plural multiaerial system between any antenna in similar frequency bands or phase
The coupling of nearly frequency range；Reduce interference mutual between antenna, improve the signal to noise ratio of system, and then lift the throughput for communicating, can
By property and reduce time delay.
Method and apparatus proposed by the present invention is especially suitable for the transmitting-receiving of the full duplex required by the third generation mobile communication system, carries
Ripple is polymerized and extensive multi-input multi-output antenna system.
Description of the drawings
Fig. 1 is that the layout of the passive antenna of multi-antenna array of the present invention and some terminating loads is illustrated；
Fig. 2 is that a kind of passive antenna arrangement for the square submatrix of Unit four in extensive mimo antenna battle array is shown in the present invention
Meaning；
Fig. 3 is a kind of passive antenna arrangement for three elementary triangle submatrixs in extensive mimo antenna battle array in the present invention
Illustrate；
Fig. 4 is that a kind of passive antenna arrangement for the linear submatrix of Unit four in extensive mimo antenna battle array is shown in the present invention
Meaning；
Fig. 5 is that passive antenna terminating load implements form schematic diagram in present example；
Fig. 6 is that the present invention is a kind of adopts parasitic micro-strip for four unit Square Microstrip Antenna battle arrays in extensive MIMO array
The specific embodiment of unit decoupling；
Fig. 7 is the isolation schematic diagram between any pair antenna of primary antenna battle array before and after the decoupling of embodiment；
Fig. 8 is that the layout of the passive antenna of the multi-antenna array and some terminating loads of external matching network in embodiment is shown
Meaning.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further in detail below in conjunction with drawings and Examples
It is thin to describe：
As shown in figure 1, attaching together for a kind of disclosed decoupling for reducing antenna coupling in multiaerial system
Put, the multiaerial system includes the antenna of at least two connection transceivers, the uncoupling device includes at least one difference
Passive antenna in multi-antenna systems between each antenna is placed, each passive antenna is terminated with load respectively.
A kind of present embodiment reduces antenna coupling and mutual interference method in providing wireless LTE communication apparatus, using as follows
Technical scheme:
As shown in Fig. 2 among an extensive MIMO array element, adding parasitic antenna element, the extensive MIMO
Multi-antenna array arranges four passive antennas, each passive antenna by the square submatrix arrangement of Unit four in corresponding each submatrix
It is separately positioned on the inner side in square four sidelines.The shape of parasitic antenna element, relative position so that former mimo antenna battle array are set
Coupling between unit is little as far as possible.Specifically set-up mode is：
The admittance matrix of array as shown in Figure 1 is extracted, the array includes three parts：Multi-antenna array, passive antenna are posted
Raw antenna terminating load.
The admittance matrix for extracting is expressed as：
Wherein, current matrix I and voltage matrix V are embodied as：
With reference to the specific admittance parameter marked in Fig. 2, corresponding admittance submatrix is expressed as in detail：
In view of parasitic antenna element terminating load Y1, Y2, Y3, after Y4, there is following current-voltage correlation
Wherein, load matrix YL is a diagonal matrix:
(5) formula is substituted in (1) formula, is finally given：
Therefore, if only extracting the admittance matrix for adding parasitic antenna element and the former multi-antenna array after terminating load, should
Should be as represented by following formula：
Contrast (7) and (8) two formulas, can obtain：
The former multi-antenna array stronger for mutual coupling, its transadmittance YA and YB is generally than larger, and adds parasitic antenna element
Afterwards, the characteristic that passive antenna itself is set is can be seen that from (9) and (10) two formulas, thus it is possible to vary the self-admittance YII in formula；
And change the relative position of passive antenna, and arrangement, then transadmittance that can be in change formula：YC,YD,YE,YF；Change passive antenna
Unit terminating load, thus it is possible to vary the YL in formula, by the admittance parameter described in calculating and setting, can cause transadmittance YA ' and
YB ' is as close possible to 0.Transadmittance is close to 0, it is meant that enough little of mutual coupling between antenna array each unit.
Further, except the array format shown in Fig. 2, decoupling method proposed by the invention can be applicable to Fig. 3
Shown triarray, the extensive MIMO multi-antenna arrays are arranged by the linear submatrix of Unit four, in corresponding each submatrix
Three passive antennas are set, and each passive antenna is separately positioned between two neighboring primary antenna unit.Arrangement side shown in Fig. 3
Formula, is common in the terminals such as Wi-Fi routers.Using the same design and calculation method illustrated with formula (1)～(10), can be with
Using a parasitic antenna element, the mutual coupling between all three pairs of antennas is reduced.
Further, decoupling method proposed by the invention is readily adaptable for use in multiple-unit linear array as shown in Figure 4.It is described
Extensive MIMO multi-antenna arrays arrange three passive antennas, often by the linear submatrix arrangement of Unit four in corresponding each submatrix
Individual passive antenna is separately positioned between two neighboring primary antenna unit, using the same design illustrated with formula (1)～(10)
And computational methods, the mutual coupling between all antennas can be reduced.
The load of the passive antenna termination, can have various ways of realization as shown in Figure 5：
1：Open circuited transmission line；
2：Short-circuited transmission line；
3：Ground capacity；
4：Grounded inductor；
5：LC series resonant tanks.
Fig. 6 is the specific enforcement example of one kind of the present invention.For four unit micro-strip days being arranged on 1 ＇ of base plate
Linear array, being coupling under limited spacing between 2 ＇ of antenna element are than larger, by arranging four equally by micro-strip day
3 ＇ of parasitic antenna element that line is constituted, and 5 ＇ of load by 4 ＇ of distributing point connections is further set, all days can be reduced
Various mutual coupling between 2 ＇ of line unit.
Before and after decoupling, the mutual coupling between each antenna in former multi-antenna array is compared, and refers to Fig. 7.Can see, in decoupling
Before, the mutual coupling between antenna element is generally higher than 10dB, and after passing through the passive antenna decoupling of the terminating load, mutual coupling can
To be reduced to below 25dB.
As shown in figure 8, after passive antenna is added, the matching network after primary antenna battle array further can be set,
So that while coupling is reduced, in the former multi-antenna array, the matching status of each antenna are not affected by very big.
It should be noted that the wireless device includes but is not limited to base station, router, mobile phone, data card, it is also possible to should
The wireless communication terminal of multiple antennas environment has been used for other.
Above example only illustrates and not to limit technical scheme, although with reference to above-described embodiment to the present invention
It has been described in detail, it will be understood by those within the art that：Still the present invention can be modified or be equal to
Replace, any modification or partial replacement without departing from the spirit and scope of the present invention, which all should cover the right in the present invention
In the middle of claimed range.
Claims (9)
1. a kind of for reducing the uncoupling device that antenna is coupled in multiaerial system, the multiaerial system includes at least two
The antenna of connection transceiver, it is characterised in that：The uncoupling device includes that at least one is individually positioned in multiaerial system
Passive antenna between each antenna, each passive antenna are terminated with load respectively.
2. uncoupling device according to claim 1, it is characterised in that：The passive antenna be monopole, inverse-F antenna,
Loop aerial, the combination of one or more in microstrip antenna.
3. uncoupling device according to claim 1, it is characterised in that：The load is open circuited transmission line, short circuit transmission
The combination of one or more in line, ground capacity, grounded inductor, LC series resonant tanks.
4. uncoupling device according to claim 1, it is characterised in that：The multiaerial system is extensive MIMO many days
Linear array, router antenna, antenna for mobile phone, the one kind in data card antenna.
5. uncoupling device according to claim 4, it is characterised in that：The extensive MIMO multi-antenna arrays are single by four
The square submatrix arrangement of unit, arranges four passive antennas in corresponding each submatrix, each passive antenna is separately positioned on square four
The inner side in individual sideline.
6. uncoupling device according to claim 4, it is characterised in that：The extensive MIMO multi-antenna arrays are single by three
First triangle submatrix arrangement, arranges a passive antenna on the inside of the triangle of corresponding each submatrix.
7. uncoupling device according to claim 4, it is characterised in that：The extensive MIMO multi-antenna arrays are single by four
The linear submatrix arrangement of unit, arranges three passive antennas in corresponding each submatrix, each passive antenna is separately positioned on adjacent two
Between individual primary antenna unit.
8. the uncoupling device according to claim 1-7 any one, it is characterised in that：Each day of many days systems
Line is provided with matching network so that after adding the passive antenna battle array of terminating load, the matching status of former multiaerial system are not sent out
It is raw to change.
9. a kind of decoupling method for reducing the uncoupling device of the coupling of antenna in multiaerial system, it is characterised in that：Extract
The admittance matrix of the array constituted containing multiaerial system and passive antenna system, by adjusting the self-admittance of passive antenna, with
And the transadmittance between passive antenna and passive antenna and multiaerial system between, and the load admittance of passive antenna termination,
So that the transadmittance between the one or more pairs of antennas of multiaerial system is little as far as possible, mutual coupling is less than 25dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610912063.3A CN106532261A (en) | 2016-10-20 | 2016-10-20 | Decoupling device and method for reducing antenna coupling in multi-antenna system |
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| CN201610912063.3A CN106532261A (en) | 2016-10-20 | 2016-10-20 | Decoupling device and method for reducing antenna coupling in multi-antenna system |
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Cited By (7)
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|---|---|---|---|---|
| CN107275799A (en) * | 2017-04-28 | 2017-10-20 | 西安电子科技大学 | Passive antenna array for improving multiple multifrequency antenna working frequency range isolations |
| CN109524783A (en) * | 2017-09-20 | 2019-03-26 | 西安四海达通信科技有限公司 | Reduce the method and relevant multiaerial system, wireless telecommunications system of antenna coupling |
| CN110752450A (en) * | 2018-07-23 | 2020-02-04 | 京信通信技术(广州)有限公司 | Low mutual coupling multi-system common antenna |
| CN110867641A (en) * | 2019-12-06 | 2020-03-06 | 惠州Tcl移动通信有限公司 | Mobile terminal MIMO antenna and mobile terminal equipment |
| CN113708045A (en) * | 2021-07-29 | 2021-11-26 | 东莞华贝电子科技有限公司 | Wireless communication device |
| WO2022007672A1 (en) * | 2020-07-06 | 2022-01-13 | Huawei Technologies Co., Ltd. | Antenna array with self-cancelling conductive structure |
| CN117525880A (en) * | 2023-12-05 | 2024-02-06 | 安徽大学 | Coupling resonator decoupling network applied to mutual coupling inhibition of multiple antenna units |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117525880A (en) * | 2023-12-05 | 2024-02-06 | 安徽大学 | Coupling resonator decoupling network applied to mutual coupling inhibition of multiple antenna units |
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