CN209526207U - The control of micro- band beams and polarization changer based on graphene - Google Patents
The control of micro- band beams and polarization changer based on graphene Download PDFInfo
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- CN209526207U CN209526207U CN201920330673.1U CN201920330673U CN209526207U CN 209526207 U CN209526207 U CN 209526207U CN 201920330673 U CN201920330673 U CN 201920330673U CN 209526207 U CN209526207 U CN 209526207U
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 107
- 230000010287 polarization Effects 0.000 title claims abstract description 46
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000010410 layer Substances 0.000 claims abstract description 16
- 239000002356 single layer Substances 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- 238000011982 device technology Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 5
- 150000001336 alkenes Chemical class 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 graphite Alkene Chemical class 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a kind of microwave section beam-controller and polarization changer based on graphene, belongs to microwave device technology field, graphene band is arranged on PVC substrate in PVC substrate, FR4 medium and the metal base plate from top to bottom set gradually；Graphene band includes single-layer graphene band and multi-layer graphene band.Micro- band beams based on graphene of the utility model control and polarization changer structure is simple, the sheet resistance of graphene can be applied different voltage by DC voltage source to it and be controlled, static method is utilized in the utility model, i.e., grows the graphene of respective impedance directly to verify to design.The utility model concrete function includes direction controlling and convert the polarized state of reflected beam to reflected beam, application, the application for graphene in microwave section such as can be used for orienting, is stealthy and having sprawled road.
Description
Technical field
The utility model belongs to microwave device technology field, is related to the control of micro- band beams and polarization based on graphene and becomes
Parallel operation.
Background technique
Beam direction control and the transformation of wave beam polarization state are either in the basic research of electromagnetism still in electromagnetic device skill
It is all critically important project in terms of art, in fields such as reflector antenna, beam formed antenna, satellite communication, mobile communications
Suffer from important application.From the perspective of electromagnetism, beam direction control and the transformation of wave beam polarization state are had relied on pair
The control of electromagnetic wave phase.
In recent years, with the development on Meta Materials and super surface, people have completely new means to the phase controlling of electromagnetic wave,
Device based on phase controlling also flourishes accordingly.As a kind of two-dimensional Meta Materials, super surface has lightweight, easily
Physical characteristic, it is often more important that, expected from people can be obtained by the change of the parameters such as shape, size to sub-wavelength unit
Reflection or transmission phase value, and then by different array arrangements, form various functional devices.Traditional is pasted based on metal
Once fixed, function also determines the Meta Materials shape of piece therewith, lacks tunable characteristic and restructural characteristic.
In order to solve this drawback, Adjustable Diode is widely used among the phase controlling in super surface to electromagnetic wave, and
And it is applied to beam direction control (T.J.Cui, M.Q.Qi, X.Wan, J.Zhao, and Q.Cheng, " Coding
metamaterials,digital metamaterials and programmable metamaterials,”Light
Sci.Appl., vol.3, p.e218,2014.), wave beam polarization state transformation (Fern á ndez, O., G ó mez,Vegas,A.,
Molina-Cuberos,G.J.,&Barba,I.“Diode switchable chiral metamaterial structure
Forpolarization manipulation, " 2017IEEE MTT-S InternationalConference179,2017)
Equal fields.However, the device based on Adjustable Diode exists, welding is complicated, and the numerous disadvantage of feeder line is caused to its practical application
It is inconvenient.
Graphene starts the brand-new material of development for 2004 as one kind, in mechanics, electricity, optics, biochemistry etc.
Aspect shows outstanding performance, such as has most fast electron mobility (15000cm2/v/cm), superelevation not temperature controlled
Charge carrier mobility (200000cm2/v/s) and efficient Fermi velocity (106m/s) close to the light velocity.Graphene is also
Fabulous mechanical performance, Young's modulus 1.0TPa, in addition, it there are also fabulous electron conductivity and flexibilities.
Exactly because these properties of graphene, vast researcher give high attention rate.By more than ten
The development in year, existing Many researchers will carry out phase controlling to electromagnetic wave using graphene, and then reach beam direction tune
Control (T.Yatooshi, A.Ishikawa, and K.Tsuruta, " Terahertz wavefront control
bytunablemetasurface made of graphene ribbons,”Appl.Phys.Lett.,vol.3,no.5,
Pp.788,2015) and polarization state converts (Yu X., Gao X., Qiao W., et al.Broadband Tunable
PolarizationConverter Realized by Graphene-Based Metamaterial,IEEEPhotonics
Technol.Lett.28,2399,2016), but these work are based on theory, and in the majority with Terahertz frequency range.And lead at present
The common microwave section of letter technology, the work for carrying out phase controlling using graphene is seldom, to find out its cause, graphene is in microwave section
Characteristic is equivalent to one layer of adjustable resistive film, the imaginary part very little of impedance, it is difficult to generate high-amplitude and phase change is abundant anti-
Characteristic is penetrated, therefore, it is necessary to carry out patterned process to graphene, so as to " the equivalent imaginary part " of acquisition；In addition, microwave section application is wanted
Ask the size of graphene larger, the growth of large-area graphene just becomes the difficult point for hindering its practical application with patterning.2018
Year, this seminar is in (Chen H., Lu W.B., Liu Z.G., Zhang J., Zhang A.Q., Wu B.Experimental
Demonstration of Microwave Absorber Using Largearea Multilayer-Graphene based
Frequency Selective Surface, IEEETrans.Microw.Theory Tech., 66,3087,2018) in work
It solves the problems, such as that large-area graphene is patterned, provides possibility to carry out phase controlling in microwave section using graphene.
Utility model content
Purpose of utility model: the purpose of this utility model is to provide the controls of micro- band beams and polarization based on graphene
Converter relies on large-area graphene patterning techniques, using graphene band, from theory to experimentally demonstrating graphene
A possibility that microwave section carries out beam direction control and wave beam polarization conversion, beaten for graphene in the large-scale application of microwave section
Solid foundation is descended.
Technical solution: in order to realize above-mentioned purpose of utility model, the utility model adopts the following technical solution:
Based on graphene micro- band beams control and polarization changer, including from top to bottom set gradually PVC substrate,
Graphene band is arranged on the PVC substrate in FR4 medium and metal base plate；The graphene band includes single layer stone
Black alkene band and multi-layer graphene band.
Further, the PVC substrate with a thickness of 70 μm, relative dielectric constant 3.5.
Further, the relative dielectric constant of the FR4 medium is 4.4, with a thickness of 3mm.
Further, the graphene band is a kind of periodic structure, structural cycle 7mm.
Further, the single-layer graphene band and multi-layer graphene band are arranged at intervals on PVC substrate.
Further, when micro- band beams control and polarization changer are used as the direction of control reflected beam, graphite
The width of alkene band (single-layer graphene band and multi-layer graphene band) is 2.1mm；When micro- band beams control and polarization
When converter is used as the polarized state for changing reflected beam, graphene band (single-layer graphene band and multi-layer graphene band)
Width be set to 3.5mm.When the graphene strips bandwidth is 2.1mm, the beam scanning function of different angle is realized；When
When the graphene strips bandwidth is 3.5mm, the function of wave beam polarized state transformation is realized.
The utility model has the advantages that compared with prior art, the control of micro- band beams and polarization based on graphene of the utility model
Transformer configuration is simple, and the sheet resistance of graphene can be applied different voltage by DC voltage source to it and be controlled, directly
The graphene of respective impedance is grown to verify to design.The utility model concrete function includes to reflected beam progress side
To control and the polarized state of reflected beam is converted, the application such as can be used for orienting, is stealthy, is graphene in microwave section
Using having sprawled road.
Detailed description of the invention
Fig. 1 is the control of micro- band beams and polarization changer structural schematic diagram based on graphene；
Fig. 2 is the control of micro- band beams and polarization changer unit top view based on graphene；
Fig. 3 be device as beam-controller when, the reflected phase characteristics of structural unit；
Fig. 4 be device as beam-controller when, array structure reflecting lobes distribution emulation and test result；
Fig. 5 be device as polarization changer when, the reflected phase characteristics of structural unit；
Fig. 6 be device as polarization changer when, the emulation and test result of the back wave polarized state of array structure.
Specific embodiment
The structure of the utility model and performance are described further with reference to the accompanying drawing.
As shown in figures 1 to 6, appended drawing reference are as follows: single-layer graphene band 1, multi-layer graphene band 2, PVC substrate 3, FR4 are situated between
Matter 4, metal base plate 5 and graphene band 6.
The control of micro- band beams and polarization changer based on graphene, including the PVC substrate from top to bottom set gradually
3, graphene band 6 is arranged in FR4 medium 4 and metal base plate 5 on PVC substrate 3；Graphene band 6 includes single-layer graphene item
Band 1 and multi-layer graphene band 2.
PVC substrate 3 with a thickness of 70 μm, relative dielectric constant 3.5.The relative dielectric constant of FR4 medium 4 is 4.4, thick
Degree is 3mm.Graphene band 6 is a kind of periodic structure, structural cycle 7mm.Single-layer graphene band 1 and Multi-layer graphite
Alkene band 2 is arranged at intervals on PVC substrate 3.
When micro- band beams control and polarization changer are used as the direction of control reflected beam, graphene band 6
Width is 2.1mm；When micro- band beams control and polarization changer are used as the polarized state for changing reflected beam, graphene
The width of band 6 is set to 3.5mm.
The preparation method of the control of micro- band beams and polarization changer based on graphene, includes the following steps:
1) using matlab and equivalent circuit theory to graphene band, PVC substrate 3, FR4 medium 4, metal base plate 5 into
Row modeling, by parameter scanning, optimization obtains the strip width value and band sheet resistance value of best performance.The result shows that working as graphite
When alkene strip width is 2.1mm, institute's utility model device has good wave beam control function, and graphene strips bandwidth is
When 3.5mm, institute's utility model device has the function of good polarization conversion；
2) designed model is modeled using business software CST, simulates the characteristic of array；
3) processing preparation is carried out to array designed by above step, and tests its performance；
It, can be by graphene band 6 (single-layer graphene band 1, multilayer according to the difference in incidence wave direction in step 1)
Graphene band 2) it is equivalent to connecting for resistance and inductance or connecting for resistance and capacitor, equivalent resistance, inductance, capacitor
Formula can be found in (Luukkonen O, Simovski C, Granet G, Simple and accurate analytical
model of planar grids and high-impedance surfaces comprising metal strips or
Patches.IEEE Trans.Antennas Propag.56,1624,2008.) and (Costa, F., Monorchio, A., &
Manara,G.Analysis and design of ultrathin electromagnetic absorbers
comprising resistively loaded high impedance surfaces,IEEE Trans.Antennas
Propag.58,1551,2010.).Remaining component, including PVC substrate 3, FR4 medium 4, metal base plate 5 can be with respective
Standard transmission line model characterizes；
In step 2), what the emulation of array was used is time-domain simulation method, graphene band 6 (single-layer graphene band 1,
Multi-layer graphene band 2) it is simulated with the impedance boundary condition of zero thickness, the sheet resistance of graphene is set as 5 Ω/sq and 2000
Ω/sq is open boundary to the boundary condition that model applies.When artificial reflections beam direction and reflected beam polarized state, add
Add far field probe；
In step 3), single-layer graphene band 1 is grown using copper foil, and multi-layer graphene band 2 is grown using nickel foil,
Growing method is CVD method, and after growth, graphene band 6 is transferred on PVC3；Finally, the PVC that graphene band 6 will be had
Substrate 3 fits on 4 plate of FR4 medium of metal base plate 5 (copper bottom).
Fig. 1 is microwave section beam-controller and polarization changer structural schematic diagram based on graphene.Single-layer graphene item
It is indicated respectively with different patterns with 1 and multi-layer graphene band 2.In order to facilitate differentiation, in figure, we are by different levels
Spacing structure has gone out certain distance, in fact, graphene band 6 (single-layer graphene band 1, multi-layer graphene band 2) and PVC
Substrate 3, FR4 medium 4, metal base plate 5 fit closely together.
Fig. 2 is microwave section beam-controller and polarization changer unit top view based on graphene, wherein the week of unit
Phase is 7mm, and the width of graphene band 6 is depending on its function.When the device is used as the direction of control reflected beam, graphene
The width of band 6 is set to 2.1mm, and when the device is used as the polarized state for changing reflected beam, the width of graphene band 6 is fixed
For 3.5mm.
Fig. 3 be institute's utility model device as beam-controller when, the reflected phase characteristics of structural unit, at this point, addition
The direction of an electric field that is actuated to polarize along band.It can be seen from the figure that the sheet resistance when graphene is respectively 5 Ω/sq and 2000
When Ω/sq, the reflected phase of the two reaches 180 ° in 13GHz, is based on this, we carry out different arrays using both units
Arrangement, it is hereby achieved that different reflected beam directions.
Fig. 4 be institute's utility model device as beam-controller when, Fig. 4 (a) and Fig. 4 (b) are the anti-of array structure respectively
The emulation and test result of ejected wave valve distribution.For convenience of description, array as shown in Figure 1 be two multi-layer graphene bands 2, two
Single-layer graphene band 1 distributes alternately, and is denoted as (N=2).And so on, in Fig. 4, emulate and test (N=4) and (N=2)
Situation, it can be seen that emulation and the main lobe direction of reflected beam tested have changed to 55.5 ° from 24.3 °.Fig. 3 and Fig. 4
Result embody the good reflected beam direction controlling ability of institute's utility model device.
Fig. 5 be institute's utility model device as polarization changer when, the reflected phase characteristics of structural unit, the phase in figure
What difference reflected is the difference reflected between wave phase under incident polarization respectively x- polarization and y- polarization.It can from figure
Out, when the sheet resistance of graphene is 5 Ω/sq, phase difference can generate from less than 90 ° to being greater than 270 ° of traversal；And work as graphite
The sheet resistance of alkene be 2000 Ω/sq when, phase difference almost keep 0 ° it is constant.
Fig. 6 be institute's utility model device as polarization changer when, the emulation of the back wave polarized state of array structure and
Test result.It can be seen from the figure that the axis ratio of back wave is generated in 7GHz and 11GHz or so when graphene sheet resistance very little
Minimum (<2dB), and generate a maximum (>40dB) in 9GHz or so, illustrates in these frequency points, and back wave is compared to entering
Ejected wave, polarized state experienced from linear polarization to left-hand circular polarization, linear polarization to crossed linear polarization, linear polarization to right-handed circular polarization
Transformation.When graphene sheet resistance is very big, the axis ratio of back wave remains at 20dB or more, in conjunction with the phase difference value in Fig. 5
It is found that back wave maintains the polarized state of incidence wave.It is good anti-that the result of Fig. 5 and Fig. 6 embodies institute's utility model device
Ejected wave polarization state ability to transform.
Claims (6)
1. the control of micro- band beams and polarization changer based on graphene, it is characterised in that: including from top to bottom setting gradually
PVC substrate (3), FR4 medium (4) and metal base plate (5), on the PVC substrate (3) be arranged graphene band (6)；Institute
The graphene band (6) stated includes single-layer graphene band (1) and multi-layer graphene band (2).
2. the control of micro- band beams and polarization changer according to claim 1 based on graphene, it is characterised in that: institute
The PVC substrate (3) stated with a thickness of 70 μm, relative dielectric constant 3.5.
3. the control of micro- band beams and polarization changer according to claim 1 based on graphene, it is characterised in that: institute
The relative dielectric constant for the FR4 medium (4) stated is 4.4, with a thickness of 3mm.
4. the control of micro- band beams and polarization changer according to claim 3 based on graphene, it is characterised in that: institute
The graphene band (6) stated is a kind of periodic structure, structural cycle 7mm.
5. the control of micro- band beams and polarization changer according to claim 1 based on graphene, it is characterised in that: institute
The single-layer graphene band (1) and multi-layer graphene band (2) stated are arranged at intervals on PVC substrate (3).
6. the control of micro- band beams and polarization changer according to claim 1 based on graphene, it is characterised in that: when
When micro- band beams control and polarization changer are used as the direction of control reflected beam, the width of graphene band (6) is
2.1mm；When micro- band beams control and polarization changer are used as the polarized state for changing reflected beam, graphene band
(6) width is set to 3.5mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786965A (en) * | 2019-03-15 | 2019-05-21 | 东南大学 | The control of micro- band beams and polarization changer based on graphene and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786965A (en) * | 2019-03-15 | 2019-05-21 | 东南大学 | The control of micro- band beams and polarization changer based on graphene and preparation method thereof |
| CN109786965B (en) * | 2019-03-15 | 2024-05-07 | 东南大学 | Microwave section beam control and polarization converter based on graphene and preparation method thereof |
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