CN109244668A - A kind of Meta Materials decoupling method of point blank mimo antenna - Google Patents
A kind of Meta Materials decoupling method of point blank mimo antenna Download PDFInfo
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- CN109244668A CN109244668A CN201811336920.5A CN201811336920A CN109244668A CN 109244668 A CN109244668 A CN 109244668A CN 201811336920 A CN201811336920 A CN 201811336920A CN 109244668 A CN109244668 A CN 109244668A
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- Prior art keywords
- meta materials
- mimo antenna
- coating
- antenna
- point blank
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0087—Apparatus or processes specially adapted for manufacturing antenna arrays
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Details Of Aerials (AREA)
Abstract
The present invention relates to a kind of Meta Materials decoupling methods of point blank mimo antenna, belong to wireless communication technology field.Point blank described in this method refers to mimo antenna internal element spacing less than 0.1 λ, by utilizing the Meta Materials with single negative characteristic, design and produce Meta Materials coat structure, multi-layer metamaterial coating is disposed vertically right above mimo antenna, reduce the coupling between mimo antenna, it realizes the point blank mimo antenna of high isolation, broadens antenna isolation bandwidth.
Description
Technical field
The present invention relates to a kind of Meta Materials decoupling methods of point blank mimo antenna, belong to wireless communication technology field.
Background technique
With the rapid development of wireless communication, following mobile communication volume will exponentially increase again, realize mobile communication
The transmission of High rate and large capacity is a problem, and (how defeated Multiple-Input Multiple-Output, multi input be by MIMO
System out) technology can be effectively solved this problem, therefore MIMO technology receives the extensive concern of scientific research personnel.MIMO technology
It refers to that signal is received and emitted using mutiple antennas simultaneously in input terminal and output end, bandwidth of operation can not increased
In the case of, improve channel capacity.
But in mimo antenna, the coupling between unit is an extremely serious problem, especially flat in current system
It in the case that platform increasingly pursues miniaturization, needs to arrange mutiple antennas in a limited space, therefore needs to allow between antenna each other
That leans on more reduces space recently, but antenna leans on closer, and coupling is horizontal higher.Coupling between unit will lead to antenna mismatch, drop
The radiation efficiency of low antenna.In mimo antenna, existing decoupling method include neutralize line technology, passive uncoupling network and
EBG (electro-magnetic bandgap) technology etc., but the distance between antenna overwhelming majority is all distant, is greater than 0.1 λ, and the work belt of antenna
It is wide usually all relatively narrow.
Summary of the invention
The present invention is directed to the problems of the prior art, and communicating miniaturization, high isolation, wide bandwidth to meet MIMO wants
It asks, proposes a kind of Meta Materials decoupling method of point blank mimo antenna.This method utilizes multi-layer metamaterial coating, reduces MIMO
The point blank mimo antenna of high isolation is realized in coupling between antenna, broadens antenna isolation bandwidth；It is suitable for inclusion in multiple days
The mimo antenna of line unit.
The point blank refers to mimo antenna internal element spacing less than 0.1 λ.(λ is mimo antenna central task wave
It is long)
The Meta Materials have single negative characteristic (i.e. negative magnetoconductivity and positive dielectric within the scope of the working band of mimo antenna
Constant or negative permittivity and positive magnetic conductivity), it is widely used in all kinds of microwave devices.
The method of the present invention specifically includes the following steps:
Step 1 designs Meta Materials coat structure.Meta Materials coating includes the multiple identical and centrosymmetric super material of metal
Material unit, periodic arrangement form the array of m × n (m >=3, n >=3).Seamless abutting, Meta Materials between adjacent metamaterial unit
The area of cell array can cover all antenna element areas of mimo antenna, using metamaterial unit negative magnetoconductivity close to 0
The uncoupling of band limits progress mimo antenna.
Step 2 makes Meta Materials coating on PCB (Printed Circuit Board) plate.According to described in step 1
Meta Materials coat structure, copper is covered on pcb board and makees Meta Materials coating.
Step 3 is disposed vertically multi-layer metamaterial coating right above mimo antenna.The structure of every layer of Meta Materials coating
Identical, mimo antenna can be completely covered in area.The spacing of one layer the Meta Materials coating and mimo antenna nearest apart from mimo antenna
Less than 0.1 λ, the spacing of adjacent two layers Meta Materials coating is between Meta Materials coating and mimo antenna and adjacent super less than 0.05 λ
It is supported between material coating with dielectric posts, Support Position can arbitrarily be selected under the premise of not blocking antenna element and metamaterial unit
It selects.The Meta Materials coating number of plies is more, and isolation bandwidth can be wider, and isolation effect can be more preferable, but section height is higher, coating number of plies root
It is selected according to factors such as the bandwidth of needs, isolation effect, sizes.
Beneficial effect
The present invention effectively realizes the point blank of mimo antenna unit using multi-layer metamaterial coating, reduces mimo antenna
The coupling of unit has broadened the isolation bandwidth of antenna.
Detailed description of the invention
Fig. 1 is the original mimo antenna structural schematic diagram in the specific embodiment of the invention；
Fig. 2 is the metamaterial modular construction schematic diagram in the specific embodiment of the invention；
Fig. 3 is the permeability characteristics of the Meta Materials in the specific embodiment of the invention；
Fig. 4 is MIMO days of the metamaterial unit arrangement mode and load Meta Materials coating in the specific embodiment of the invention
Line side view, (a) metamaterial unit arrangement mode；(b) the mimo antenna side view of Meta Materials coating is loaded；
Fig. 5 is the comparison of reflection coefficient before and after the mimo antenna load Meta Materials coating in the specific embodiment of the invention；
Fig. 6 is the comparison of isolation before and after the mimo antenna load Meta Materials coating in the specific embodiment of the invention；
Label declaration: the first microstrip antenna of 1a-, the second microstrip antenna of 1b-, the first FR4 dielectric-slab of 2a-, the 2nd FR4 of 2b-
Dielectric-slab, the 3rd FR4 dielectric-slab of 2c-, 3- coaxial line, 4- metamaterial unit, 5a- the first Meta Materials coating, the second Meta Materials of 5b-
Coating, 6- dielectric posts.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, mimo antenna includes two dimensional structure same antenna units, i.e. the first microstrip antenna 1a and second
Microstrip antenna 1b, the first microstrip antenna 1a and the second microstrip antenna 1b are symmetrically etc. big to be placed, and the edge of the first microstrip antenna 1a
To the distance d=1mm at the edge of the second nearest microstrip antenna 1b.The length l1=12.4mm of first microstrip antenna 1a, width
W1=14mm, the first microstrip antenna 1a are printed on the first FR4 dielectric-slab 2a, dielectric constant 4.4, with a thickness of 3mm, first
FR4 dielectric-slab 2a length ls=42mm, widthws=26mm.Feed the form presented using 3 bottom of SMA coaxial line, coaxial line 3
Inner conductor diameter r1=1.3mm, outer conductor diameter r2=4.1mm internal and external conductor filled polytetrafluoroethylene (teflon) medium are situated between
Electric constant is 2.1.The distance d1=3.7mm of the top edge feeding point distance the first microstrip antenna 1a.
As shown in Fig. 2, single metamaterial unit 4 is single using traditional ELC (Electric-inductor-capacitor)
The form of meta structure.4 structure of metamaterial unit presses 7 × 5 arrangement mode about origin symmetry with the direction y in the x-direction respectively
It is printed on the 2nd FR4 medium substrate 2b, forms the first Meta Materials coating 5a, dielectric constant 4.4, with a thickness of 1.6mm.Super material
Period p=8.5mm of material unit 4, metal line width w=0.5mm, metal wire aperture slots distance c=0.4mm, intermetallic metal line
Longitudinal length l1=7mm, metal wire side length a=8mm, longitudinal metal line brachium b=3.8mm, horizontal wire brachium l2=
1.8mm。
Fig. 3 gives permeability characteristics of the metamaterial unit 4 within the scope of 1~10GHz.From the figure 3, it may be seen that the unit
Resonance is generated in 3GHz, there is maximum negative magnetoconductivity, but in order to obtain bigger bandwidth, negative magnetoconductivity is utilized close to 0
Band limits carry out uncoupling, the real part of magnetic conductivity within the scope of 4.3~5.5GHz extraction of values between -1~0, can be used for
The uncoupling of mimo antenna.
Metamaterial unit 4 is subjected to arrangement by 7 × 5 arrangement mode with the direction y in the x-direction respectively and forms the second Meta Materials
Coating 5b, as shown in Fig. 4 (a), metamaterial unit is printed on the 3rd FR4 dielectric-slab 2c, dielectric constant 4.4, with a thickness of
1.6mm, the length ls1=59.5mm of dielectric-slab, width ws1=56.5mm.The Meta Materials coating 5 that two layers arranges is loaded into
Above mimo antenna, as shown in Fig. 4 (b), optimize the by HFSS (High Frequency Structure Simulator)
Height h1 and the second Meta Materials coating 5b between one Meta Materials coating 5a and the second Meta Materials coating 5b and mimo antenna it
Between height h2, be optimal uncoupling effect.When final h1=2mm, h2=3mm, coupling effect is best.First Meta Materials cover
It is supported, is situated between with dielectric posts between layer 5a and the second Meta Materials coating 5b and between the second Meta Materials coating 5b and mimo antenna
6 material of matter column is teflon, dielectric constant 2.1.The radius and supporting point position of dielectric posts can be adjusted according to the actual situation.
Mimo antenna loads reflection coefficient (S11) comparison before and after two layers of Meta Materials coating as shown in figure 5, as seen from the figure,
Mimo antenna bandwidth after load has certain broadening, and the working frequency range of mimo antenna is 4.5~5.1GHz, resonance point before loading
For 4.9GHz, there are multiple resonance points due to the coupling of Meta Materials coating and mimo antenna in mimo antenna after load, exhibition
Wide bandwidth, working frequency range are 4.1GHz~5.4GHz.
The comparison that mimo antenna loads the coefficient of coup (S12) before and after Meta Materials coating is as shown in Figure 6.It will be appreciated from fig. 6 that plus
After carrying Meta Materials coating, the coupling between 4.4~5.3GHz band limits internal antenna unit, which has, significantly to be reduced, 4.5
Isolation in~5.25GHz frequency range is respectively less than -15dB, and at 4.9GHz, the coupling between antenna element reduces 30dB.
The foregoing is merely presently preferred embodiments of the present invention, not makees restriction in any form to the present invention, any ripe
Know the equivalent reality that professional and technical personnel was changed or be modified to equivalent variations possibly also with the technology contents of the disclosure above
Example, but without departing from the technical solutions of the present invention, according to the technical essence of the invention to any made by above example
Simple modification, equivalent change and modification should belong to the covering scope of the claims in the present invention.
Claims (5)
1. a kind of Meta Materials decoupling method of point blank mimo antenna, it is characterised in that: specifically include the following steps:
Step 1 designs Meta Materials coat structure；Meta Materials coating includes multiple identical and centrosymmetric metal Meta Materials list
Member, periodic arrangement form m × n, m >=3, n >=3 array；Seamless abutting between adjacent metamaterial unit, metamaterial unit battle array
The area of column can cover all antenna element areas of mimo antenna, the frequency range model using metamaterial unit negative magnetoconductivity close to 0
Enclose the uncoupling for carrying out mimo antenna；
Step 2 makes Meta Materials coating on pcb board；According to Meta Materials coat structure described in step 1, covered on pcb board
Copper makees Meta Materials coating；
Step 3 is disposed vertically multi-layer metamaterial coating right above mimo antenna；The structure of every layer of Meta Materials coating is identical,
Mimo antenna can be completely covered in area；The spacing of the one layer Meta Materials coating and mimo antenna nearest apart from mimo antenna is less than
0.1 λ, λ are mimo antenna center operating wavelength；The spacing of adjacent two layers Meta Materials coating less than 0.05 λ, Meta Materials coating and
It is supported between mimo antenna and between adjacent Meta Materials coating with dielectric posts.
2. a kind of Meta Materials decoupling method of point blank mimo antenna according to claim 1, it is characterised in that: described
Point blank refers to mimo antenna internal element spacing less than 0.1 λ.
3. a kind of Meta Materials decoupling method of point blank mimo antenna according to claim 1, it is characterised in that: described
Meta Materials have negative magnetoconductivity and positive dielectric constant or negative permittivity and positive magnetic within the scope of the working band of mimo antenna
Single negative characteristic of conductance.
4. a kind of Meta Materials decoupling method of point blank mimo antenna according to claim 1, it is characterised in that: super material
Expect that the coating number of plies is more, isolation bandwidth is wider, and isolation effect is more preferable, and section height is higher.
5. a kind of Meta Materials decoupling method of point blank mimo antenna according to claim 1, it is characterised in that: medium
Column Support Position can arbitrarily select under the premise of not blocking antenna element and metamaterial unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811336920.5A CN109244668A (en) | 2018-11-12 | 2018-11-12 | A kind of Meta Materials decoupling method of point blank mimo antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811336920.5A CN109244668A (en) | 2018-11-12 | 2018-11-12 | A kind of Meta Materials decoupling method of point blank mimo antenna |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110085997A (en) * | 2019-04-30 | 2019-08-02 | 中国科学技术大学 | A kind of mimo antenna battle array surpassing surface coating using electromagnetism |
| CN110853801A (en) * | 2019-11-15 | 2020-02-28 | 苏州大学 | Transparent electrode, photovoltaic cell, electronic device and preparation method of transparent electrode |
| CN111585012A (en) * | 2020-06-18 | 2020-08-25 | 西安电子科技大学 | Integrated modulable metamaterial antenna housing and antenna assembly |
| CN111600127A (en) * | 2020-05-27 | 2020-08-28 | 西安朗普达通信科技有限公司 | Novel array antenna system |
| CN112510366A (en) * | 2020-10-19 | 2021-03-16 | 西安朗普达通信科技有限公司 | Cascaded decoupling chip |
| WO2021142947A1 (en) * | 2020-01-13 | 2021-07-22 | 西安朗普达通信科技有限公司 | Decoupling method for antenna array and antenna array having novel decoupling structure |
-
2018
- 2018-11-12 CN CN201811336920.5A patent/CN109244668A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110085997A (en) * | 2019-04-30 | 2019-08-02 | 中国科学技术大学 | A kind of mimo antenna battle array surpassing surface coating using electromagnetism |
| CN110853801A (en) * | 2019-11-15 | 2020-02-28 | 苏州大学 | Transparent electrode, photovoltaic cell, electronic device and preparation method of transparent electrode |
| CN110853801B (en) * | 2019-11-15 | 2021-10-22 | 苏州大学 | Transparent electrode, photovoltaic cell, electronic device and preparation method of transparent electrode |
| WO2021142947A1 (en) * | 2020-01-13 | 2021-07-22 | 西安朗普达通信科技有限公司 | Decoupling method for antenna array and antenna array having novel decoupling structure |
| CN111600127A (en) * | 2020-05-27 | 2020-08-28 | 西安朗普达通信科技有限公司 | Novel array antenna system |
| CN111585012A (en) * | 2020-06-18 | 2020-08-25 | 西安电子科技大学 | Integrated modulable metamaterial antenna housing and antenna assembly |
| CN112510366A (en) * | 2020-10-19 | 2021-03-16 | 西安朗普达通信科技有限公司 | Cascaded decoupling chip |
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Application publication date: 20190118 |