CN106058477A - Microwave band dual-layer metal wire structural chirality super surface - Google Patents
Microwave band dual-layer metal wire structural chirality super surface Download PDFInfo
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- CN106058477A CN106058477A CN201610311098.1A CN201610311098A CN106058477A CN 106058477 A CN106058477 A CN 106058477A CN 201610311098 A CN201610311098 A CN 201610311098A CN 106058477 A CN106058477 A CN 106058477A
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- super surface
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- 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
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Abstract
The present invention relates to the artificial microstructure electromagnetism and electromagnetic metamaterial field, is the research of a microwave device based on the artificial super surface and possessing the structural chirality characteristics, in particular relates to a microwave band dual-layer metal wire structural chirality super surface. According to the microwave band dual-layer metal wire structural chirality super surface provided by the present invention, the super surface contains n unit structures, wherein n is an integer greater than or equal to 2. Each unit structure comprises an upper-layer artificial micro-structure, a dielectric-substrate and a lower-layer artificial micro-structure, has a quadruple rotation symmetry and contains four basic cellular structures, and each basic cellular structure is a dual-metal wire antenna. The super surface is very thin in overall size, is very suitable for being applied to a small-size integrated electromagnetic device and can realize a pure angle of rotation within a very large frequency band, and a maximum rotation angle can reach 125 degrees. The microwave band dual-layer metal wire structural chirality super surface of the present invention, besides having the above functional beneficial effects, is also simple in preparation and lower in cost, and can be simply made by a PCB processing technology.
Description
Technical field
The present invention relates to artificial micro-structure electromagnetism and electromagnetism Meta Materials field, be based on artificial super surface and to there is structure
The research of the microwave device of chirality, particularly relates to a kind of microwave section double-level-metal line structure chiral and surpasses surface.
Background technology
Chiral structure shortage mirror image, to shaking property, therefore has good optical activity, and i.e. electromagnetic wave is after Chiral Media
Create optical activity.Artificial chiral soliton, optical activity is the optical space dispersion caused by structure chiral, with natural medium phase
Ratio, artificial chiral soliton has better performance.For artificial chiral Meta Materials, the decay of two kinds of circular polarization states is to be broken
, i.e. Meta Materials is different with the refractive index of right-handed rotation for left-handed rotation.In order to be better understood from the intrinsic propesties of chiral material, have
Three amounts to define respectively.First being optical activity, it refers to that incidence wave passes through the rotational angle in rear polarizer face, super surface,
General angle of rotation describes；Next to that dichroism, it refers to that super surface is for left-handed incident illumination and the suction of dextrorotation incident illumination
Receipts are different；Last is ovality, characterize transmitted wave compared with incidence wave, the difference of polarization state, such as, circularly polarized light
It is converted into elliptical polarization.
First Svirko etc. have studied the coupling of double layer planar chiral metal micro structure, theoretically prophesy in calendar year 2001
Double-deck strong optical activity .Kwon etc. are simulated meter to operation wavelength near infrared gammadion chiral structure
Calculate, obtained being to the maximum the angle of rotation of 90 °, devised the most again the network structure near infrared band with negative index, and
The most superfine foundation said structure proposes three layers of chiral network, and analog result shows that this structure has by force at visible light wave range
Optical activity.Recently, the double-deck chiral structure of what some were new have strong optical activity and negative index is suggested, such as double-deck rosette
Structure, decussate texture, U-shaped structure, L-shaped structure and turned metal chip architecture etc., the most also demonstrate double layer planar hands
Levy structure and can obtain the negative index of strong optical activity and circularly polarised wave.
Summary of the invention
For defect or deficiency present in prior art, the technical problem to be solved is: provide a kind of micro-
Wave band bilayer metal wire structure chiral surpasses surface, and its basic structure is that bilevel metal wire has reversed certain angle, breaks
Rotational symmetry introduces chirality.The physical dimension of careful design metal wire and the anglec of rotation, obtain more optimal optics and live
Property and ovality.Utilize analogue simulation, calculate the transmission system that left-handed incident illumination (LCP) is the most corresponding with dextrorotation incident illumination (RCP)
Number and reflection coefficient, and utilize the transmission coefficient that obtains and reflection coefficient, the Inversion Calculation angle of rotation of this structure, circular dichroism
Property, ovality, chiral parameter etc..In order to understand electromagentic resonance characteristic in depth, we have also further looked at the surface of metal wire
, at resonant position, there is the cross-couplings in electric field and magnetic field in electric current.
To achieve these goals, the technical scheme that the present invention takes is for providing a kind of microwave section double-level-metal line structure hands
Levying super surface, this super surface comprises n cellular construction, and wherein n is the integer more than or equal to 2, and described cellular construction includes upper strata
Artificial micro-structure, dielectric substrate and lower floor's artificial micro-structure；Described cellular construction has quadruple rotational symmetry, and it comprises four
Individual basic structure cell, each basic structure cell is bimetallic conductor antenna.
As a further improvement on the present invention, described bimetal antennas is 0.1 millimeter at microwave section 2.4GHz thickness, is super
Thin patch structure.
As a further improvement on the present invention, described basic structure cell often organizes metal wire and has all deflected special angle,
But its extended line constitutes a square.
As a further improvement on the present invention, described metal wire is two identical parallel Copper Foils of size.
As a further improvement on the present invention, the dielectric substrate material on described super surface is FR-4, and its dielectric constant is: εr
=4.3+0.025i.
As a further improvement on the present invention, in described super surface, upper and lower two-layer artificial micro-structure is identical, the micro-knot of lower floor
Structure is more clockwise than entirety than upper strata micro structure has reversed 40 °, introduces chirality.
As a further improvement on the present invention, described super surface for left-handed wave LCP and right hand wave RCP refractive index not
With.
The invention has the beneficial effects as follows: 1. the super surface that the present invention proposes, structure is ultrathin paster structure, and its thickness exists
Microwave band 2-4GHz is only 0.1 millimeter.Super surface overall volume is the thinnest, is highly suitable to be applied for the integrated electromagnetic device of small size
Part.2. the super surface that the present invention proposes can realize the pure angle of rotation in the biggest frequency range, and the angle of rotation of maximum can reach
To 125 °.3. the present invention is simple except above-mentioned functional benefit is also equipped with making, and cost is relatively low, can simply use PCB
Processing technique makes.
Accompanying drawing explanation
Fig. 1 is the cellular construction schematic diagram that the microwave section bilayer bimetallic conductor structure of the present invention surpasses surface；
Fig. 2 be for the incident transmission spectrum of left-handed rotation and right-handed rotation and reflectance spectrum (wherein-represent LCP；+ represent RCP)；
Fig. 3 is the transmission phase that left-handed rotation is incident with right-handed rotation；
Fig. 4 is that angle of rotation and ovality are with incident light frequency variation diagram；
Wherein in Fig. 1, the 1 same color district represented is superstructure, and the 2 same color districts represented are understructure, 1 and 2
It it is all perfect electric conductor (can be the metals such as copper, aluminum, ferrum in low frequency microwave frequency range)；Region 3 is dielectric substrate region.
Detailed description of the invention
The present invention is further described for explanation and detailed description of the invention below in conjunction with the accompanying drawings.
As it is shown in figure 1, one microwave section double-level-metal line structure chiral of the present invention surpasses surface, this super surface comprises n list
Meta structure, wherein n is the integer more than or equal to 2, and described cellular construction includes upper strata artificial micro-structure, dielectric substrate and lower floor
Artificial micro-structure；Described cellular construction has quadruple rotational symmetry, and it comprises four basic structure cells, each basic cellular
Structure is bimetallic conductor antenna.
Described bimetal antennas is 0.1 millimeter at microwave section 2.4GHz thickness, for ultrathin paster structure.
Described basic structure cell is often organized metal wire and has all deflected special angle, but its extended line constitutes pros
Shape.
Described metal wire is two identical parallel Copper Foils of size.
The dielectric substrate material on described super surface is FR-4, and its dielectric constant is: εr=4.3+0.025i.
In described super surface, upper and lower two-layer artificial micro-structure is identical, and lower floor's micro structure is than upper strata micro structure ratio entirety
Reverse 40 ° clockwise, introduce chirality.
Described super surface is different with the refractive index of right hand wave RCP for left-handed wave LCP.
The plane chiral structure of design is periodic structure, and each cellular construction is as shown in Figure 1. it is by being distributed in medium
The bimetallic conductor on layer two sides is constituted, and upper strata is rotated 60 ° successively by four, 150 °, and the metal wire of 240 ° and 330 ° is by certain position
Putting arrangement, every pair of metal wire of lower floor turns clockwise the angle of 40 ° corresponding to upper strata metal wire, as shown in Figure 1. concrete structure
Parameter is as follows: cycle P=35*4mm, length l=24.5mm of metal wire, width w=3.5mm, and the thickness h of dielectric layer=
8.75mm.Wherein metal level is copper, and dielectric layer uses FR-4.Limite Element Method on Frequency Field method is used to be simulated periodic structure
Calculate.It is incident that plane wave is perpendicular to body structure surface, is perpendicular on the direction of propagation of ripple use periodic boundary condition.Accompanying drawing 2 is
Transmission spectrum corresponding to the LCP ripple on this super surface and RCP ripple and reflectance spectrum (representing with DB), it can be seen that super surface is for LCP
The transmission of ripple and RCP ripple is different.Accompanying drawing 3 is both transmission phases.
The optical activity of plane chiral structure is mainly reflected on circular dichroism and the angle of rotation θ of structure, wherein circular dichroism
Property characterize be in chiral soliton propagate RCP ripple and LCP ripple transmission spectrum between difference；Angle of rotation θ then refers to chiral soliton pair
The rotatory power in incident light polarization face, it is defined as: θ=[arg (T++)-arg(T--)]/2, ovality η=arctan [(T++-
T--)/(T+++T--)], they produce mechanism be due to double layer planar chiral metal micro structure between electromagnetic coupled.Accompanying drawing 4
Be calculate angle of rotation θ and ovality η with incidence wave frequency change.As can be seen from the figure: 1. (2GHz in the biggest wave band
～2.85GHz and 3.5GHz～4GHz), η ≈ 0, the purest optical activity, now, it is still during the incidence wave outgoing of linear polarization
Linear polarization, has simply deflected θ angle.2. exist three θ=0 frequency, this explanation can on the premise of not twist polarization face,
The ovality of super surface modification incidence wave.The position η ≈ 45 ° that the most especially in figure, circle marks, i.e. the linearly polarized wave of this frequency
Time incident, circularly polarized outgoing wave (or contrary) can be obtained.4. θ is very big, can reach 125 °, and big angle of rotation can be light
Easy generation negative index.
Above content is to combine concrete preferred implementation further description made for the present invention, it is impossible to assert
Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of present inventive concept, it is also possible to make some simple deduction or replace, all should be considered as belonging to the present invention's
Protection domain.
Claims (7)
1. a microwave section double-level-metal line structure chiral surpasses surface, it is characterised in that: this super surface comprises n cellular construction,
Wherein n is the integer more than or equal to 2, and described cellular construction includes that upper strata artificial micro-structure, dielectric substrate and lower floor are the most micro-
Structure, described cellular construction has quadruple rotational symmetry, and it comprises four basic structure cells, and each basic structure cell is
Bimetallic conductor antenna.
Microwave section double-level-metal line structure chiral the most according to claim 1 surpasses surface, it is characterised in that: described bimetallic
Antenna is 0.1 millimeter at microwave section 2.4GHz thickness, for ultrathin paster structure.
Microwave section double-level-metal line structure chiral the most according to claim 1 surpasses surface, it is characterised in that: described unit substantially
Born of the same parents' structure is often organized metal wire and has all deflected special angle, but its extended line constitutes a square.
Microwave section double-level-metal line structure chiral the most according to claim 3 surpasses surface, it is characterised in that: described metal wire
It is two identical parallel Copper Foils of size.
Microwave section double-level-metal line structure chiral the most according to claim 1 surpasses surface, it is characterised in that: described super surface
Dielectric substrate material be FR-4, its dielectric constant is:。
Microwave section double-level-metal line structure chiral the most according to claim 1 surpasses surface, it is characterised in that: at described super table
In face, upper and lower two-layer artificial micro-structure is identical, and lower floor's micro structure is more clockwise than entirety than upper strata micro structure has reversed 40 °, draws
Enter chirality.
Microwave section double-level-metal line structure chiral the most according to claim 1 surpasses surface, it is characterised in that: described super surface
Different with the refractive index of right hand wave RCP for left-handed wave LCP.
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| CN201610311098.1A CN106058477B (en) | 2016-05-11 | 2016-05-11 | A kind of super surface of microwave section double-level-metal cable architecture chiral |
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| CN201610311098.1A CN106058477B (en) | 2016-05-11 | 2016-05-11 | A kind of super surface of microwave section double-level-metal cable architecture chiral |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112068230A (en) * | 2020-08-19 | 2020-12-11 | 杭州电子科技大学 | Space torsion three-dimensional nanostructure with selective transmission difference to 1550nm band chiral light and preparation method thereof |
| CN113113778A (en) * | 2021-04-13 | 2021-07-13 | 中国人民解放军空军工程大学 | Dual-functional super surface based on circularly polarized transflective selective structure and regulation and control method thereof |
| CN113193375A (en) * | 2021-04-21 | 2021-07-30 | 西安海天天线科技股份有限公司 | Method for manufacturing sheet-shaped dielectric elliptic cylindrical lens |
| CN113835140A (en) * | 2021-03-16 | 2021-12-24 | 电子科技大学 | Heterogeneous metal mesh metamaterial structure for realizing circular dichroism |
Citations (4)
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| US20110261441A1 (en) * | 2010-04-26 | 2011-10-27 | University Of Southampton | Spectral Filter |
| CN102692733A (en) * | 2012-05-24 | 2012-09-26 | 哈尔滨工程大学 | Multimodal cross polarization filter based on metamaterials |
| CN104020623A (en) * | 2014-06-05 | 2014-09-03 | 哈尔滨工程大学 | Background-free wave beam direction controller based on split ring structure |
| CN104155775A (en) * | 2014-06-05 | 2014-11-19 | 哈尔滨工程大学 | Tunable asymmetric-transmission optical device based on phase-change material |
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2016
- 2016-05-11 CN CN201610311098.1A patent/CN106058477B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110261441A1 (en) * | 2010-04-26 | 2011-10-27 | University Of Southampton | Spectral Filter |
| CN102692733A (en) * | 2012-05-24 | 2012-09-26 | 哈尔滨工程大学 | Multimodal cross polarization filter based on metamaterials |
| CN104020623A (en) * | 2014-06-05 | 2014-09-03 | 哈尔滨工程大学 | Background-free wave beam direction controller based on split ring structure |
| CN104155775A (en) * | 2014-06-05 | 2014-11-19 | 哈尔滨工程大学 | Tunable asymmetric-transmission optical device based on phase-change material |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112068230A (en) * | 2020-08-19 | 2020-12-11 | 杭州电子科技大学 | Space torsion three-dimensional nanostructure with selective transmission difference to 1550nm band chiral light and preparation method thereof |
| CN113835140A (en) * | 2021-03-16 | 2021-12-24 | 电子科技大学 | Heterogeneous metal mesh metamaterial structure for realizing circular dichroism |
| CN113113778A (en) * | 2021-04-13 | 2021-07-13 | 中国人民解放军空军工程大学 | Dual-functional super surface based on circularly polarized transflective selective structure and regulation and control method thereof |
| CN113113778B (en) * | 2021-04-13 | 2023-01-17 | 中国人民解放军空军工程大学 | Dual-functional super surface based on circularly polarized transflective selective structure and regulation and control method thereof |
| CN113193375A (en) * | 2021-04-21 | 2021-07-30 | 西安海天天线科技股份有限公司 | Method for manufacturing sheet-shaped dielectric elliptic cylindrical lens |
| CN113193375B (en) * | 2021-04-21 | 2022-02-18 | 西安海天天线科技股份有限公司 | Method for manufacturing sheet-shaped dielectric elliptic cylindrical lens |
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| CN106058477B (en) | 2019-01-15 |
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