CN104218320B - Tripolar magneto-dipole MIMO (multiple input multiple output) antenna system - Google Patents
Tripolar magneto-dipole MIMO (multiple input multiple output) antenna system Download PDFInfo
- Publication number
- CN104218320B CN104218320B CN201410379871.9A CN201410379871A CN104218320B CN 104218320 B CN104218320 B CN 104218320B CN 201410379871 A CN201410379871 A CN 201410379871A CN 104218320 B CN104218320 B CN 104218320B
- Authority
- CN
- China
- Prior art keywords
- loop antenna
- antenna
- mimo
- dipole
- loop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention relates to a tripolar magneto-dipole MIMO (multiple input multiple output) antenna system and belongs to the technical field of wireless communication systems. A tripolar magneto-dipole MIMO antenna is composed of a first loop antenna, a second loop antenna and a third loop antenna which are mutually orthogonal. Geometric centers of the first, the second and the third loop antennas are located at one spatial point and feed respectively. Each loop antenna has evenly distributed current; meanwhile, the first, the second and the third loop antennas are low in coupling; MIMO channel capacity is high accordingly. The compact MIMO antenna with high channel capacity is composed of the coincident low-coupled tripolar magneto-dipoles. Extraction and utilization of three magnetic field polarization components are achieved, and three polarization degrees of freedom of the magnetic field components can be acquired accordingly.
Description
Technical field
The present invention relates to a kind of 3 polarization magnetic dipole mimo antenna system, belongs to wireless communication system technologies field.
Background technology
As there are in terms of the channel capacity of wireless communication system is improved MIMO technology very big potentiality to be subjected to people
Extensive concern.However, in order to obtain larger channel capacity, it is desirable to realize that the antenna of mimo system is obtained in that sufficiently large
Spatial degrees of freedom.The spatial degrees of freedom of one mimo system refers to the independent subchannels number that it can be supported.In traditional base
In the mimo system of single-polarized antenna, in order to obtain sufficiently large spatial degrees of freedom, it is desirable to the array element of transmitting and reception antenna
Spacing will be sufficiently large.In the environment of multi-path rich, minimum array element distance is half wavelength, and in the sparse environment of multipath
5-10 wavelength may be reached.Due to the bulk of base station and mobile client it is all very limited therefore traditional based on list
The application of the mimo system of poliarizing antenna receives many restrictions, and can be very good solution based on the mimo system of multi-polarization antenna
Determine this problem.In the mimo system that multi-polarization antenna is constituted, due to the utilization to polarization of electromagnetic field information, can be by sky
Between concurrent, different polarization modes antenna realizing, therefore multipolarization mimo antenna provides a kind of compact mimo system
Realize technology.
Additionally, the multi-polarization antenna of this concurrent is due to detecting vector electromagnetic field component, also referred to as vector sensor.Arrow
Amount antenna also has important using value in addition to it can be used for radio communication, in the system such as wireless location and navigation.
Three orthogonal electric dipoles and three orthogonal magnetic-dipole antennas of space concurrent can at most be obtained in theory
Obtain 6 spatial degrees of freedom.It is in fact, compared with concurrent, orthogonal electrical dipole antenna are designed, the concurrent of lower coupling, orthogonal
Magnetic-dipole antenna design difficulty is bigger, due to being more prone to coupling between loop antenna adjacent to each other.
Therefore, concurrent, 3 orthogonal electric dipoles design it is relatively conventional, and concurrent, orthogonal multiple magnetic dipole days
The design of line is also rare.Additionally, found by the research of early stage, in order to obtain larger mimo channel capacity, it is desirable to ring day
Line has the antenna pattern for being close to ideal magnetic dipole.And in order to obtain a ring for being close to ideal magnetic dipole radiation characteristic
Antenna, it is desirable to which the electric current on becket proposes two kind of two polarization orthogonal ring respectively with being uniformly distributed in document [1] and [2]
Antenna, and there is uniform current distribution, disclosure is also seldom seen in concurrent, lower coupling, the design of 3 orthogonal magnetic-dipole antennas
Report.
The design of the current 2 polarization magnetic-dipole antennas for only finding several concurrents, and the 3 of concurrent polarization magnetic-dipole antennas
Also seldom see.Compared with 2 polarization magnetic-dipole antennas, 1.5 times of highest can be obtained by the magnetic-dipole antenna of 3 polarization
Channel capacity gain, it is seen that design 3 polarize magnetic-dipole antennas for realizing compact, the mimo system of spectral efficient has
Vital meaning.
If however, using the concurrent of 3 common loop antennas compositions, 3 polarization loop antennas, can produce between them very big
Coupling, cause the radiation efficiency of antenna very low and cannot use.
Document [1] B.Elnour and D.Erricolo, a kind of " novel concurrent cross polarization for working in 2.4-GHz
Bicyclic PCB antenna, " IEEE Antennas Wireless Propag.Lett., vol.9, pp.1237-1240,2010.
Document [2] D.Piao, Y.Mao, and H.Zhang, " two kinds of novel concurrents for polarity diversity MIMO applications
Dual polarization lower coupling antenna, " in Proc.The 2nd International Conference on Connected
Vehicles&Expo(ICCVE2013),Las Vegas,USA,Dec.2-6,2013。
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention to provide a kind of 3 polarization magnetic dipole mimo antenna system.
A kind of concurrent, lower coupling, positive intersecting and merging have 3 polarization magnetic dipole mimo antennas of high channel capacity, 3 polarization magnetic
Dipole mimo antenna is made up of 3 the first mutually orthogonal loop antennas, the second loop antenna and the 3rd loop antennas, this first ring day
The same point that the geometric center of line, the second loop antenna and the 3rd loop antenna is positioned in the space, is fed respectively；Have on each loop antenna
Have uniform CURRENT DISTRIBUTION, while the coupling between the first loop antenna, the second loop antenna and the 3rd loop antenna is relatively low, so as to compared with
High mimo channel capacity；
The first loop antenna, the second loop antenna in wherein 3 polarization magnetic-dipole antennas is realized by cycle capacitive load
Uniform CURRENT DISTRIBUTION；This loop antenna is printed on Teflon substrates, and the performance parameter of substrate is εr=2.65, tan δ=
0.002, thickness h=0.7mm；Whole ring is uniformly divided into eight parts, is wherein connected to impedance matching on Part I
Transducer；
The design parameter of ring：Outer radius R1=23.5mm, inside radius R2=20.5mm, the angle of each section of arc strip line
For a1=44 °, the interval between adjacent arc strip line is a2=1 °.
Advantages of the present invention first using concurrent, lower coupling three polarization magnetic dipoles constitute with higher channel capacity
Mimo antenna.Compared with polarization magnetic-dipole antenna, it can realize the extraction and utilization of three magnetic field polarization components, so as to
Three polarization degree of freedom of magnetic-field component can be obtained.As the structure of antenna is that geometric center concurrent is orthogonal so that whole day
The size reduction of linear system system is to (0.19 λ)3, wherein λ is the operation wavelength in free space, is conducive to what bulk was limited
The realization of mimo antenna system.Additionally, ideal isolation is still achieved while cramped construction is realized, work frequency
When rate is 2.4GHz, isolation can reach 38dB.
Description of the drawings
When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can more fully understand the present invention with
And the adjoint advantage of many of which is easily learnt, but accompanying drawing described herein is used for providing a further understanding of the present invention,
The part of the present invention is constituted, the schematic description and description of the present invention is used for explaining the present invention, does not constitute to this
Bright improper restriction, such as figure are wherein：
Fig. 1, concurrent, 3 polarization magnetic-dipole antenna schematic diagrams of orthogonal, lower coupling；
The structural representation of Fig. 2, single magnetic dipole 1 and 2；
Fig. 3, concurrent, 2 orthogonal magnetic-dipole antenna schematic diagrams；
Fig. 4, the 3rd magnetic-dipole antenna structural representation；
Fig. 5, crack after single magnetic dipole 1 and 2 structural representation；
The reflecting properties schematic diagram of Fig. 6,3 polarization magnetic-dipole antennas；
The coupling performance schematic diagram of Fig. 7,3 polarization magnetic-dipole antennas；
The channel capacity of Fig. 8 (a), 3 polarization magnetic-dipole antennas and 2 polarization magnetic-dipole antennas compares；2 polarization magnetic dipoles
Sub- curve chart；
The channel capacity of Fig. 8 (b), 3 polarization magnetic-dipole antennas and 2 polarization magnetic-dipole antennas compares；3 polarization magnetic dipoles
Sub- curve chart；
3 polarization magnetic-dipole antennas and 2 polarization magnetic-dipole antenna mimo channels when Fig. 9 (a), dual-mode antenna are highly equal
Matrix exgenvalue compares；2 polarization magnetic dipole curve charts；
3 polarization magnetic-dipole antennas and 2 polarization magnetic-dipole antenna mimo channels when Fig. 9 (b), dual-mode antenna are highly equal
Matrix exgenvalue compares；3 polarization magnetic dipole curve charts；
Figure 10 (a), dual-mode antenna height not etc. when 3 polarization magnetic-dipole antennas and 2 polarization magnetic-dipole antenna MIMO letters
Road matrix exgenvalue compares, 2 polarization magnetic dipole curve charts；
Figure 10 (b), dual-mode antenna height not etc. when 3 polarization magnetic-dipole antennas and 2 polarization magnetic-dipole antenna MIMO letters
Road matrix exgenvalue compares, 3 polarization magnetic dipole curve charts.
The present invention is further described with reference to the accompanying drawings and examples.
Specific embodiment
Obviously, those skilled in the art belong to the guarantor of the present invention based on many modifications and variations done by spirit of the invention
Shield scope.
Embodiment 1：As illustrated,
Disclose a kind of with uniform current distribution in the present invention, concurrent, lower coupling, orthogonal 3 polarization magnetic dipole structure
Into mimo antenna system.
Build 3 polarization magnetic dipole mimo antenna systems of a concurrent, lower coupling, first, the center of antenna element
Same point to be positioned in the space and keep orthogonal, be beneficial to the magnetic-field component for receiving three polarised directions.Secondly,
In order to obtain an antenna pattern similar with magnetic dipole, the electric current on ring needs to have and is uniformly distributed.Finally, it is more important
Be that isolation between antenna element to be made is sufficiently large to obtain larger radiation efficiency.
In the present invention by particular design, with uniform current distribution loop antenna come constitute a kind of lower coupling, just
3 polarization magnetic dipole mimo antenna (the first loop antenna 1, the second loop antenna 2 and the 3rd loop antenna 3) are handed over, as shown in Figure 1.
The loop antenna common for one, is difficult to realize uniform CURRENT DISTRIBUTION on ring, special sets as shown in Fig. 2 this
The ring of meter, realizes uniform CURRENT DISTRIBUTION by cycle capacitive load, first in the 3 polarization magnetic-dipole antennas of Fig. 1
Loop antenna 1, the second loop antenna 2 adopt this structure.
First loop antenna 1, the second loop antenna 2 are printed on Teflon substrates, and the performance parameter of substrate is εr=2.65,
Tan δ=0.002, thickness h=0.7mm.
First loop antenna 1, the whole ring of the second loop antenna 2 are uniformly divided into eight parts, wherein on Part I
It is connected to impedance matching transformer.The following is the design parameter of the ring：Outer radius R1=23.5mm, inside radius R2=20.5mm, often
The angle of one section of arc strip line is a1=44 °, the interval between adjacent arc strip line is a2=1 °.
For capacitive load performance period, in one end of each arc strip line plus the coupling line being interleaved with each other.This
Partial parameter is：Internal arc banding live width ws=1mm, angle a3=11 °, and be separated by with the inner boundary of hollow out strip line
gs=0.4mm, is separated by angle a with hollow out strip line bottom4=1 °.The length of two parallel strip line impedance matching boxs is lp
=13mm, width wp=0.5mm, they are at intervals of 0.8mm.
Using the feed gap of this ring, can very easily in the first loop antenna 1, the impedance transformation of the second loop antenna 2
A gap is respectively cut out in interval between device, so can just enable them to constitute a concurrent, 2 orthogonal polarization
Antenna.It is noted that the width in gap is 0.8mm, and the thickness of whole substrate is 0.7mm, in order that printing copper strips
Line is not contacted with each other, and two rings mutually will be staggered 0.1mm.As shown in Figure 3.
Another key issue of the present invention is, on the basis of 2 orthogonal magnetic-dipole antennas are realized, how to insert
The 3rd magnetic dipole with uniform current distribution, makes it have close working band with other 2 magnetic dipoles, and
With relatively low coupling.
And be edge that metal part therein is all located at dielectric-slab using another benefit of this ring structure, can be very
The 3rd loop antenna 3 of convenient insertion.
But if then need to reduce the size of the 3rd loop antenna 3 as the 3rd ring using the loop antenna of same structure, but
So its operating frequency is just changed.
Therefore, in order that 3 rings have a common working band, in the present invention, there is uniform current using another
The loop antenna of distribution comes as the 3rd magnetic dipole, as shown in Figure 4.It is using a kind of artificial biography with zero propagation constant
Defeated line is come the loop antenna realized so that the electric current of the ring keeps in the same direction, so as to obtain the horizontally polarized omnidirectional of similar magnetic dipole
Radiation mode.
It is equally printed on dielectric-slab, and parallel microstrip line is printed on the two sides of plate, and the material of dielectric-slab is
Teflon, performance parameter are εr=2.65, tan δ=0.002, thickness h=0.7mm.Whole ring is made up of 12 parts, up and down
Each six, wherein first part middle opening does not need impedance matching box as feed mouth through parameter optimization.
Design parameter is as follows：The center radius of ring be R=14mm, angle a of each section of arc strip line1It is=54 °, adjacent
The gap of arc strip line is a2=6 °, micro belt line width is W=4mm.
In order to insert the 3rd ring, to the ring shown in Fig. 2 in, outputed one perpendicular to impedance transducer by origin
Long 40mm, the gap of wide 0.8mm, as shown in Figure 5.
So, a kind of 3 polarization magnetic dipole mimo antenna systems as shown in Figure 1, compact, orthogonal have been obtained, it
Whole volume is not more than 23.5mm3。
In figure 6, give the S of antenna1,1、S2,2And S3,3, while being presented in Fig. 7 S1,2、S2,1、S1,3、S3,1、S3,2
And S2,3.It is seen from figure 6 that, it is considered to bandwidth of the return loss more than 10dB, the bandwidth of operation that 3 rings can be overlapped are 2.35GHz
To between 2.45GHz, the requirement of the wireless communication systems such as the WiFi of the ISM band for working in 2.4GHz can be met.Additionally
Can make its operating frequency between 2.28-2.85GHz, meet more broadband by the parameter of the 3rd loop antenna 3 of adjustment
The requirement of scope.
As can see from Figure 7, antenna element is operated in frequency and is all higher than 20dB less than isolation during 2.65GHz.If
It is operated in 2.4GHz, the first loop antenna 1, the return loss of the second loop antenna 2 are 14dB, the return loss of the 3rd loop antenna 3 is
28dB, the isolation of 3 antennas can reach 38dB.
Embodiment 2：As illustrated,
The channel capacity of one communication system is to weigh the important indicator of systematic function, and it refers to that a channel can be error-free
The maximum information rate of misfeed.The channel capacity of the mimo system that below this 3 polarization magnetic-dipole antennas are constituted and 2 polarization
The result of magnetic-dipole antenna is compared, it is therein 2 polarization magnetic-dipole antenna by Fig. 1 in 1 (magnetic dipole of the first loop antenna
Son), the second loop antenna 2 (magnetic dipole) constitute.
The channel capacity computing formula of mimo system is：
Here I is 3 × 3 unit matrix, nTIt is the number of transmitting antenna, SNR is received signal to noise ratio, is set to 20dB,
It is the conjugate transpose of matrix H.
Compared with single polarization system, multipolarization mimo system typically can obtain larger letter in the environment of multi-path rich
Road capacity gain, therefore, a corridor with PEC (perfect electric conductor) border is have selected as applied environment, because this is
A kind of environment of multipath compared with horn of plenty.Channel matrix therein is obtained by HFSS software emulations.
Specific simulation parameter arranges as follows：Corridor size：200cm (length) × 80cm (width) × 80cm (height), launches day
Line height ht=40cm, reception antenna height hrIn two kinds of situation, #1：hr=40cm, #2：hr=20cm.In Fig. 8 (a), Fig. 8
The channel capacity of 3 polarization magnetic-dipole antennas and 2 polarization magnetic-dipole antennas is compared in (b), Fig. 8 (a) and Fig. 8
B () is respectively the result of the channel capacity of 2 polarization and 3 polarization magnetic-dipole antennas.Curve 1 in wherein Fig. 8 (a) and Fig. 8 (b)
Situation #1 above and situation #2 is corresponded to respectively with curve 2.
As can see from Figure 8, using this 3 channel capacities that can obtain of polarization magnetic-dipole antennas apparently higher than 2
Polarization magnetic-dipole antenna, about 1.5 times of its gain.
Additionally, the spy of the mimo channel to being made up of this 3 polarization magnetic-dipole antennas and 2 polarization magnetic-dipole antennas
Value indicative has been also carried out calculating, because in the presence of the number and size of the eigenvalue of a mimo channel reflect this channel
The size of independent parallel number of subchannels (spatial degrees of freedom) and each subchannel capacities.Fig. 9 (a), Fig. 9 (b) and Figure 10 (a), figure
10 (b) is that dual-mode antenna is highly identical and result in the case of differing respectively.
Can see from Fig. 9 (a), Fig. 9 (b) and Figure 10 (a), Figure 10 (b), adopt the 2 polarization magnetic-dipole antennas can be with
The eigenvalue of the mimo channel matrix of acquisition is 2, and it is 3 to pass through the eigenvalue that 3 polarization magnetic-dipole antennas can obtain.
Additionally, the size of eigenvalue is also relevant with the relative altitude of dual-mode antenna, compared with the highly equal situation of dual-mode antenna, work as receipts
When sending out antenna height and not waiting, 3 polarization the 2nd of magnetic-dipole antennas and the 3rd eigenvalue substantially can diminish, therefore corresponding letter
Road capacity can also decline.
To sum up, 3 polarization magnetic dipole mimo antennas of a kind of concurrent, orthogonal, lower coupling are proposed in the present invention.Through right
The adjusting and optimizing of geometric parameter, each loop aerial achieve good impedance matching, can be operated in 2.4GHz frequency ranges.It is logical
The special construction of this 3 polarization magnetic-dipole antenna is crossed, while ensure that the compactedness of antenna system, ideal is also achieved
Antenna element between isolation, therefore can apply in 3 polarization mimo systems, improve the magnetic field to 3 orthogonal directions point
The acquisition capability of amount, so that channel capacity is lifted, simultaneously can be used for the reference day of electromagnetic vector detector (EMVS)
Line.
Embodiment 3：As illustrated, the key point of the present invention is using polarity diversity principle, it is proposed that a kind of compact, by
What 3 magnetic dipoles (the first loop antenna 1, the second loop antenna 2 and the 3rd loop antenna 3) were constituted, it is geometric center concurrent, orthogonal,
3 polarization mimo antennas of lower coupling, high channel capacity.
Solve 3 loop antennas it is compact orthogonal when, high-isolation realizes this key problem.This antenna can be used in many
In polarization MIMO communication system, it is possible to achieve the acquisition of the magnetic-field component of 3 orthogonal directions, increase channel capacity.Simultaneously
Can be used as the reference antenna of electromagnetic vector detector (EMVS).The concrete feature of this antenna is described as follows：
This is the mimo antenna system that one three polarization loop antenna is constituted, with uniform electric current point in these loop antennas
Cloth, so as to the radiance with similar magnetic-dipole antenna.
The concurrent for realizing three magnetic-dipole antennas first is orthogonal, improves during multipolarization MIMO communicates to three magnetic fields
The Utilizing question of component.
Compact structure is realized, for the operating frequency of 2.4GHz, the volume of whole system is (0.19 λ)3。
This antenna has higher isolation and preferable return loss performance, for the operating frequency of 2.4GHz, 3 days
The isolation of line can reach 38dB, and the first loop antenna 1, the return loss of the second loop antenna 2 are 14dB, the 3rd loop antenna 3
Return loss is 28dB.
As described above, explained to embodiments of the invention, but as long as essentially without departing from this
Bright inventive point and effect can have many deformations, and this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (5)
1. a kind of concurrent, lower coupling, positive intersecting and merging have 3 polarization magnetic dipole mimo antennas of high channel capacity, it is characterised in that
3 polarization magnetic dipole mimo antennas are made up of 3 the first mutually orthogonal loop antennas, the second loop antenna and the 3rd loop antennas, this
The same point that the geometric center of the first loop antenna, the second loop antenna and the 3rd loop antenna is positioned in the space, is fed respectively；Each ring
There is on antenna uniform CURRENT DISTRIBUTION, while the coupling between the first loop antenna, the second loop antenna and the 3rd loop antenna is relatively low, from
And there is higher mimo channel capacity；
The first loop antenna, the second loop antenna in wherein 3 polarization magnetic-dipole antennas is realized by cycle capacitive load uniformly
CURRENT DISTRIBUTION；3rd loop antenna realizes uniform CURRENT DISTRIBUTION using a kind of artificial transmission line with zero propagation constant,
And cause the electric current of the 3rd loop antenna to keep in the same direction, so as to obtain the horizontally polarized omnidirectional radiation mode of similar magnetic dipole；
First loop antenna, the metal part of this ring structure of the second loop antenna are all located at the edge of dielectric-slab, so as to be beneficial to the 3rd
The insertion of loop antenna；The 3rd loop antenna with uniform current distribution for being inserted is had with the first loop antenna, the second loop antenna
Close working band, and with relatively low coupling.
2. a kind of concurrent according to claim 1, lower coupling, positive intersecting and merging have 3 polarization magnetic dipoles of high channel capacity
Mimo antenna, it is characterised in that the first loop antenna and the second loop antenna are printed on Teflon substrates, the performance parameter of substrate is
εr=2.65, tan δ=0.002, thickness h=0.7mm；Whole ring is uniformly divided into eight parts, wherein on Part I
The impedance matching transformer being made up of two parallel strip lines is connected to, the length of this two parallel ribbon lines is lp=
13mm, width wp=0.5mm, they are at intervals of 0.8mm；
The design parameter of ring：Outer radius R1=23.5mm, inside radius R2=20.5mm, the angle of each section of arc strip line is a1
=44 °, the interval between adjacent arc strip line is a2=1 °；
In one end of each arc strip line plus the coupling line being interleaved with each other；This part of parameter is：Internal arcuate zone
Shape live width ws=1mm, angle a3=11 °, and it is separated by g with the inner boundary of hollow out strip lines=0.4mm, with hollow out strip line bottom
It is separated by angle a4=1 °.
3. a kind of concurrent according to claim 1, lower coupling, positive intersecting and merging have 3 polarization magnetic dipoles of high channel capacity
Mimo antenna, it is characterised in that respectively cut in the interval between the first loop antenna, the impedance matching transformer of the second loop antenna
Go out a gap, allow them to constitute concurrent, 2 orthogonal poliarizing antennas；The width in gap is 0.8mm, and whole base
The thickness of plate is 0.7mm, in order that print copper strips line not contacting with each other, two rings mutually will be staggered 0.1mm.
4. a kind of concurrent according to claim 1,2 or 3, lower coupling, positive intersecting and merging have 3 polarization of high channel capacity
Magnetic dipole mimo antenna, it is characterised in that the 3rd loop antenna is printed on dielectric-slab, parallel microstrip line is printed on plate
Two sides, performance parameter are εr=2.65, tan δ=0.002, thickness h=0.7mm；Whole ring is made up of 12 parts, up and down respectively
Six, wherein first part middle opening does not need impedance matching transformer as feed mouth through parameter optimization；
Design parameter is as follows：The center radius of ring be R=14mm, angle a of each section of arc strip line1=54 °, adjacent arc
The gap of strip line is a2=6 °, micro belt line width is W=4mm；
A long 40mm by origin perpendicular to impedance matching transformer, the gap of wide 0.8mm has been outputed in ring.
5. a kind of concurrent according to claim 4, lower coupling, positive intersecting and merging have 3 polarization magnetic dipoles of high channel capacity
Mimo antenna, it is characterised in that the bandwidth of operation that the first loop antenna, the second loop antenna and the 3rd loop antenna can be overlapped is
Between 2.35GHz to 2.45GHz, the WiFi wireless communication systems of the ISM band of 2.4GHz are worked in；Adjust the 3rd loop antenna
Parameter, operating frequency can be between 2.28-2.85GHz；
Antenna element is operated in frequency and is all higher than 20dB less than isolation during 2.65GHz；It is operated in 2.4GHz, the first loop antenna,
The return loss of the second loop antenna is 14dB, and the return loss of the 3rd loop antenna is 28dB, and the isolation of 3 antennas can reach
38dB。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410379871.9A CN104218320B (en) | 2014-08-04 | 2014-08-04 | Tripolar magneto-dipole MIMO (multiple input multiple output) antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410379871.9A CN104218320B (en) | 2014-08-04 | 2014-08-04 | Tripolar magneto-dipole MIMO (multiple input multiple output) antenna system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104218320A CN104218320A (en) | 2014-12-17 |
| CN104218320B true CN104218320B (en) | 2017-03-22 |
Family
ID=52099590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410379871.9A Expired - Fee Related CN104218320B (en) | 2014-08-04 | 2014-08-04 | Tripolar magneto-dipole MIMO (multiple input multiple output) antenna system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104218320B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810623A (en) * | 2015-04-23 | 2015-07-29 | 杭州中瑞思创科技股份有限公司 | Novel three-frequency-band three-dimensional patch antenna |
| CN106025526B (en) * | 2016-05-10 | 2018-07-27 | 北京理工大学 | A kind of polarization sensitive array antenna |
| CN105870631B (en) * | 2016-05-24 | 2019-08-13 | 北京森馥科技股份有限公司 | Double loop antenna |
| CN106329154B (en) * | 2016-08-31 | 2019-09-17 | 中国传媒大学 | Four polarization mimo antenna system of one kind |
| CN106910991A (en) * | 2017-01-17 | 2017-06-30 | 中国传媒大学 | A kind of high isolation dual polarized MIMO loop antennas based on segmented line |
| CN106972236B (en) * | 2017-03-20 | 2018-07-20 | 南京邮电大学 | A kind of metal shell hand-held multi-antenna terminal |
| CN107317092A (en) * | 2017-05-16 | 2017-11-03 | 中国传媒大学 | A kind of dual polarized antenna unit, four poliarizing antennas and mimo system |
| US20190041271A1 (en) * | 2017-08-07 | 2019-02-07 | Philip Preston | Method And Assembly For A Wireless Probe And Interrogator |
| CN107394386A (en) * | 2017-09-04 | 2017-11-24 | 安徽大学 | A kind of charging transmitting antenna for people's et al. Ke equipment |
| KR102399600B1 (en) * | 2017-09-25 | 2022-05-18 | 삼성전자주식회사 | Antenna device to include antenna elements mutually coupled |
| FR3099002B1 (en) * | 2019-07-15 | 2022-05-13 | Thales Sa | SPHERE ANTENNA |
| CN111224214B (en) * | 2019-12-31 | 2021-06-08 | 重庆品胜科技有限公司 | Miniature beam-controllable RFID reader antenna based on directional diagram reconstruction |
| CN116799523A (en) * | 2022-03-18 | 2023-09-22 | 荣耀终端有限公司 | MIMO antenna system |
| CN115980465A (en) * | 2023-03-17 | 2023-04-18 | 武汉大学 | Electromagnetic vector sensor and electromagnetic signal induction equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201307640Y (en) * | 2008-07-23 | 2009-09-09 | 大唐移动通信设备有限公司 | Oscillator unit, antenna unit and antenna array |
| CN101884183A (en) * | 2007-10-16 | 2010-11-10 | 香港科技集团有限公司 | Compact 3-port orthogonally polarized mimo antennas |
| CN102170044A (en) * | 2011-03-25 | 2011-08-31 | 清华大学 | Horizontal polarization omnidirectional antenna based on composite right-left hand transmission line |
| CN102664691A (en) * | 2012-04-11 | 2012-09-12 | 中国传媒大学 | Virtual source theory-based modeling approach for six-polarized MIMO (multi-input multi-output) channel |
| CN102683900A (en) * | 2012-05-22 | 2012-09-19 | 中国联合网络通信集团有限公司 | Multi-input multi-output antenna system and multi-input multi-output method |
| CN103531919A (en) * | 2012-07-05 | 2014-01-22 | 中国电信股份有限公司 | Four-polarized antenna oscillator, four-polarized antenna and four-polarized multi-antenna array |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005099129A1 (en) * | 2004-04-08 | 2005-10-20 | Karayil Thekkoott Narayanan Ma | Method to design polarization arrangements for mimo antennas using state of polarization as parameter |
-
2014
- 2014-08-04 CN CN201410379871.9A patent/CN104218320B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101884183A (en) * | 2007-10-16 | 2010-11-10 | 香港科技集团有限公司 | Compact 3-port orthogonally polarized mimo antennas |
| CN201307640Y (en) * | 2008-07-23 | 2009-09-09 | 大唐移动通信设备有限公司 | Oscillator unit, antenna unit and antenna array |
| CN102170044A (en) * | 2011-03-25 | 2011-08-31 | 清华大学 | Horizontal polarization omnidirectional antenna based on composite right-left hand transmission line |
| CN102664691A (en) * | 2012-04-11 | 2012-09-12 | 中国传媒大学 | Virtual source theory-based modeling approach for six-polarized MIMO (multi-input multi-output) channel |
| CN102683900A (en) * | 2012-05-22 | 2012-09-19 | 中国联合网络通信集团有限公司 | Multi-input multi-output antenna system and multi-input multi-output method |
| CN103531919A (en) * | 2012-07-05 | 2014-01-22 | 中国电信股份有限公司 | Four-polarized antenna oscillator, four-polarized antenna and four-polarized multi-antenna array |
Non-Patent Citations (2)
| Title |
|---|
| A MNG-TL Loop Antenna Array With Horizontally Polarized Omnidirecrional Patterns;kunpeng wei;《ieee transactions on antennas and propagation》;20120630;第60卷;2702－2710 * |
| Two Novel Colocated Dual-Polarized Antennas with Extremely Low Mutual Coupling for polarization Diversity MIMO Applications;dazhi piao;《2013 Internatioal Conference on Connected Vehicles and Expo(ICCVE)》;20131206;531－536 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104218320A (en) | 2014-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104218320B (en) | Tripolar magneto-dipole MIMO (multiple input multiple output) antenna system | |
| Zhu et al. | Compact dual-polarized UWB quasi-self-complementary MIMO/diversity antenna with band-rejection capability | |
| Dong et al. | A decoupled multiband dual-antenna system for WWAN/LTE smartphone applications | |
| CN104733857A (en) | Miniaturized high-isolation dual-band MOMO antenna | |
| CN106299727B (en) | Low mutual coupling 4-unit ultra-wideband MIMO antenna | |
| Zhang et al. | A dual circularly polarized patch antenna with high isolation for MIMO WLAN applications | |
| CN108429005A (en) | A kind of 10 antenna MIMO system of high-isolation plane, 5G mobile terminals | |
| EP2617098B1 (en) | Antenna for diversity operation | |
| Ramirez et al. | A mutual coupling study of linear and circular polarized microstrip antennas for diversity wireless systems | |
| Liang et al. | Dual-band dual-polarized compact log-periodic dipole array for MIMO WLAN applications | |
| TW201605120A (en) | Planar dual polarization antenna and complex antenna | |
| CN106329154A (en) | Compact dual-polarization MIMO (Multiple Input Multiple Output) antenna unit and four-polarization MIMO antenna system formed by same | |
| Shi et al. | 3.6-GHz eight-antenna MIMO array for mobile terminal applications | |
| Abdullah et al. | Compact 4-port MIMO antenna system for 5G mobile terminal | |
| CN104538731A (en) | Multi-frequency high-isolation MIMO antenna | |
| CN103700929A (en) | Broadband horizontal polarization omnidirectional antenna | |
| Wong et al. | 16-antenna array in the smartphone for the 3.5-GHz MIMO operation | |
| CN202855895U (en) | Dual polarized MIMO antenna array | |
| CN102842756A (en) | Dual-polarization MIMO (Multiple Input Multiple Output) antenna array | |
| Fang et al. | A tri-band MIMO antenna for WLAN/WiMAX application | |
| CN104505578A (en) | Omnidirectional dual circularly polarized antenna | |
| Abdullah et al. | Compact four-port MIMO antenna system at 3.5 GHz | |
| Gummalla et al. | Compact dual-band planar metamaterial antenna arrays for wireless LAN | |
| Qi et al. | A Wideband Base Station Antenna Loaded with Bow-Tie-Like Parasitic Elements. | |
| CN102496778A (en) | Triangularly-arranged multiple-input-multiple-output (MIMO) antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170322 Termination date: 20180804 |