CN107275792A - A kind of full angle transparent transmission material of Terahertz frequency range - Google Patents
A kind of full angle transparent transmission material of Terahertz frequency range Download PDFInfo
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- CN107275792A CN107275792A CN201710373946.6A CN201710373946A CN107275792A CN 107275792 A CN107275792 A CN 107275792A CN 201710373946 A CN201710373946 A CN 201710373946A CN 107275792 A CN107275792 A CN 107275792A
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- electromagnetic resonance
- frequency range
- emr electromagnetic
- transparent transmission
- full angle
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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
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
Abstract
The invention discloses a kind of full angle transparent transmission material of Terahertz frequency range.Full angle transparent transmission material is coupled by artificial medium EMR electromagnetic resonance unit by spatial electromagnetic, and the EMR electromagnetic resonance layer of array formation plane where EMR electromagnetic resonance unit is constituted；EMR electromagnetic resonance unit includes the square-shaped metal transmission line frame on substrate and substrate plane, and the symmetrical centre in square-shaped metal transmission line frame circular metal disk, electric resonance and magnetic resonance can be produced by electric field and magnetic excitation simultaneously under electromagnetic wave incident；EMR electromagnetic resonance layer is in the case where Terahertz frequency range electromagnetic wave any angle is incident, with total transmissivity characteristic under any incident angle.The full angle transparent transmission material that the present invention is constructed, realizes the full angle transparent transmission material that terahertz wave band is constructed using artificial medium first, and simple in construction, can be widely applied to various artificial medium fields.
Description
Technical field
The present invention relates to artificial medium field, one kind more particularly, to artificial medium field is related to individual layer planar technology
The full angle transparent transmission material of the Terahertz frequency range of construction.
Background technology
The physical essence of artificial medium, is the sub-wavelength resonant element by dense arrangement, atom in simulation natural medium
Em polarization, to obtain specific frequency dispersion in required frequency range.Scientific circles, which are directed to utilizing always, changes sub-wavelength resonance
The architectural characteristic of unit changes the electromagnetic parameter of medium, so as to obtain with without the effective medium reflected, i.e. perfect matching
Layer (PML).PML is a kind of imaginary material model by mathematical definition in Computational electromagnetics.1994, Berenger was first
Propose PML concept, after be widely used in the finite field numerical computations of scientific research and engineering field.The electromagnetic wave arbitrarily polarized with appoint
When anticipating incident angles to PML surfaces, enter reflectingly inside PML without any.When PML has compared with lossy, the electricity of transmission
Magnetic wave energy can be rapidly absorbed, as a kind of preferable absorbing material；When PML, which has, is lost smaller, the electromagnetic wave of transmission
Energy almost can not be lost from PML outgoing, as a kind of preferable transparent material., can be with using lossless PML concepts
" self is stealthy " of medium in itself is obtained, the novel application such as " perfection " ideal antenna cover is realized.
It is currently based on frequency-selective surfaces (FSS：Frequency selective surface) all channel antenna cover grind
Study carefully many reports, but larger unit due to FSS, the limitation of strong Anisotropic Condition, fail to realize full angle
Transparent transmission characteristic.2016, Zhejiang University doctor Ye Dexin utilized 3D printing technique, proposed based on artificial medium electromagnetism ginseng
Several accurate control, realizes a kind of effective dielectric constant and magnetic conductivity and the close lossless artificial PML mediums of free space,
And 1 relative index of refraction and wave impedance are rendered proximate to H mode (TE) ripple of any polarization, any incident angle, realized micro-
The full angle transparent transmission of wave frequency section.2016, University Of Suzhou professor Hang Zhihong equally realized microwave using photonic crystal theory
The TE ripple full angle transparent transmission materials of wave band.
Up to the present, the research of full angle transparent transmission material is still limited to microwave frequency band, because microwave frequency band resonance list
The physical dimension of member is larger relative to terahertz wave band resonant cell dimension, processing is easily realized, while in microwave band, material
Intrinsic loss it is relatively small, it is easier to realize loss-free effective medium.
The content of the invention
In order to solve problem present in background technology, it is an object of the invention to propose a kind of the complete of Terahertz frequency range
Angle transparent transmission material.
The technical solution adopted for the present invention to solve the technical problems is：
First, EMR electromagnetic resonance unit：
Described EMR electromagnetic resonance unit is made up of three parts, including substrate and the endless metal for being arranged in substrate top surface
Transmission line frame and circular metal disk, endless metal transmission line frame are arranged in substrate top surface surrounding edge, circular metal disk
It is arranged in the center of substrate top surface.Substrate uses intrinsic high resistant silicon chip, endless metal transmission line frame and circular metal simultaneously
Disk uses copper.
It is gold that the EMR electromagnetic resonance unit of specific implementation, which includes material in the substrate that material is intrinsic high resistant silicon chip, substrate plane,
Belong to copper square-shaped metal transmission line frame, and material be similarly metallic copper in the symmetrical of square-shaped metal transmission line frame
The circular metal disk at center.
Described EMR electromagnetic resonance cellular construction is as shown in Figure 1.The size dimension of described resonant element is less than free space
The a quarter of medium wavelength, electric resonance and magnetic resonance can be produced under electromagnetic wave incident by electric field and magnetic excitation simultaneously, wherein
Endless metal transmission line frame influences electric resonance, circular metal disk influence magnetic resonance.
The direction of an electric field of described electromagnetic wave can where EMR electromagnetic resonance layer plane any direction, i.e. H mode.
2nd, the full angle transparent transmission material of a kind of Terahertz frequency range：
The full angle transparent transmission material of described Terahertz frequency range is made up of artificial medium EMR electromagnetic resonance layer, EMR electromagnetic resonance
Layer is that the planar array and being coupled by spatial electromagnetic where itself is formed as multiple EMR electromagnetic resonance units.
Described EMR electromagnetic resonance unit include substrate and be arranged in substrate top surface endless metal transmission line frame and
Circular metal disk, endless metal transmission line frame is arranged in substrate top surface surrounding edge, and circular metal disk is arranged on substrate
The center on surface, and endless metal transmission line frame and circular metal disk are in center pair with the same center of substrate top surface
Claim arrangement.
Described substrate is square.
Described multiple EMR electromagnetic resonance units closely arrange array in same plane so that on adjacent EMR electromagnetic resonance unit
Endless metal transmission line frame is in contact.
Described EMR electromagnetic resonance unit and EMR electromagnetic resonance layer can be simultaneously by electric fields and magnetic excitation under electromagnetic wave incident
Produce electric resonance and magnetic resonance.
The cycle uniformly arranges in horizontally and vertically two vertical direction of the described EMR electromagnetic resonance unit along plane where itself
Row form EMR electromagnetic resonance layer.
Described EMR electromagnetic resonance layer is in the case where Terahertz frequency range electromagnetic wave any angle is incident, with any incident angle
Lower total transmissivity characteristic.
The direction of an electric field of described electromagnetic wave can where EMR electromagnetic resonance layer plane any direction, i.e. H mode.
The substrate uses intrinsic high resistant silicon chip, and endless metal transmission line frame and circular metal disk use copper.
The beneficial effects of the invention are as follows：
The present invention utilizes a kind of individual layer plane technical construction full angle transparent transmission material of Terahertz frequency range, realizes
In the case that Terahertz frequency range electromagnetic wave any angle is incident, the effective medium with total transmissivity characteristic under any incident angle
Brief description of the drawings
Fig. 1 is the structural representation of EMR electromagnetic resonance unit of the present invention, and (a) represents substrate top surface figure, and (b) is represented under substrate
Exterior view, (c) represents substrate side view.
Fig. 2 is the simulation parameter curve of EMR electromagnetic resonance unit of the present invention reflectance factor under different incidence angles.
Fig. 3 is the simulation parameter curve of EMR electromagnetic resonance unit of the present invention transmission coefficient under different incidence angles.
Fig. 4 for the present invention EMR electromagnetic resonance unit in place planar horizontal direction 61 construction units of periodic arrangement, vertically
Direction is set to constitute EMR electromagnetic resonance layer under periodic boundary condition, and frequency is 302GHz electromagnetic wave normal incidence EMR electromagnetic resonance layer
The simulation result comparison diagram of far gain and the far gain of electromagnetic wave normal incidence air under the same terms.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The coordinate system that the present invention is built is the EMR electromagnetic resonance unit using resonant element substrate reverse side exterior normal direction as z directions
The vertical direction of place plane is x directions, and horizontal direction is y directions.
The structure of the EMR electromagnetic resonance unit of the present invention is as shown in figure 1, the resonant element is double-decker, including top layer is annular
Metal transmission line frame and circular metal dish structure A and underlying dielectric plate B substrate.When incidence wave direction of an electric field in the x-direction,
Magnetic field in the y-direction, the direction of propagation along the z-axis direction when, due to endless metal transmission line frame constitute resonance ring structure, when magnetic field hang down
Ring current directly can be produced when helical ring, this is the necessary requirement for producing magnetic resonance.It can be changed by adjusting circular metal disk
Become magnetic resonance, electric resonance can be adjusted by adjusting annular metal transmission line frame.
The specific embodiment and its course of work of the present invention is as follows：
The square structure of EMR electromagnetic resonance unit of the present embodiment, structure is arranged as shown in figure 1, by substrate and being arranged in
The endless metal transmission line frame and circular metal disk of substrate top surface are constituted.Endless metal transmission line frame is arranged on substrate
Surface surrounding edge, circular metal disk is arranged in the center of substrate top surface, and endless metal transmission line frame and circle gold
Category disk is centrosymmetric arrangement with the same center of substrate top surface.
The substrate length and width of each unit are respectively a=b=0.224mm.Top layer endless metal transmission line frame and
Circular metal dish structure A, thickness is tm=0.0002mm.The line width of top layer endless metal transmission line frame is w=0.012mm,
A diameter of D=0.120mm of circular metal disk.Bottom is the substrate B played a supportive role, and chosen material is intrinsic high resistant silicon chip,
Its thickness is ts=0.140mm, relative dielectric constant is 11.9, loss tangent angle 0.00025.
The EMR electromagnetic resonance unit of embodiment carries out reflection simulating experiment, the simulation parameter of reflectance factor under different incidence angles
Curve difference is as shown in Figure 2.Carry out calculating S11 and S21 parameters, frequency model using the FSS Studio modules of CST simulation softwares
270-330GHz is enclosed, boundary condition is set to periodic boundary condition, and incentive mode selection is TE wave excitations.Curve 1 represents incidence
Reflectance factor (dB) value when angle is 80 degree, curve 2 represent incidence angle as 64 degree when reflectance factor (dB) value, curve 3 represents
Incidence angle be 48 degree when reflectance factor (dB) value, curve 4 represent incidence angle as 32 degree when reflectance factor (dB) value, curve 5
Represent incidence angle as 16 degree when reflectance factor (dB) value, curve 6 represent incidence angle as 0 degree when reflectance factor (dB) value.
The EMR electromagnetic resonance unit of embodiment carries out transmission l-G simulation test, the simulation parameter of transmission coefficient under different incidence angles
Curve difference is as shown in Figure 3.Carry out calculating S11 and S21 parameters, frequency model using the FSS Studio modules of CST simulation softwares
270-330GHz is enclosed, boundary condition is set to periodic boundary condition, and incentive mode selection is TE wave excitations.Curve 1 represents incidence
Transmission coefficient (dB) value when angle is 80 degree, curve 2 represent incidence angle as 64 degree when transmission coefficient (dB) value, curve 3 represents
Incidence angle be 48 degree when transmission coefficient (dB) value, curve 4 represent incidence angle as 32 degree when transmission coefficient (dB) value, curve 5
Represent incidence angle as 16 degree when transmission coefficient (dB) value, curve 6 represent incidence angle as 0 degree when transmission coefficient (dB) value.
The EMR electromagnetic resonance unit of the present invention is in place planar horizontal direction 61 construction units of periodic arrangement, and vertical direction is set
It is set under periodic boundary condition and constitutes EMR electromagnetic resonance layer, frequency increases for the far field of 302GHz electromagnetic wave normal incidence EMR electromagnetic resonance layer
Benefit and the simulation result comparing result of the far gain of electromagnetic wave normal incidence air under the same terms are as shown in Figure 4.Curve 1 is represented
The far gain result of electromagnetic wave normal incidence air, curve 2 represents the far gain result of electromagnetic wave normal incidence EMR electromagnetic resonance layer.
Compare two curves, deflection is between (- 58 °, 58 °), and curve 1 and curve 2 are almost completely superposed, while at (- 180 °, -58 °)
(58 °, 180 °) angle far gain value is both less than -20dB, represents that EMR electromagnetic resonance layer can be equivalent to air.
The centre frequency of the EMR electromagnetic resonance unit of the embodiment of the present invention is 300GHz, and the centre frequency of EMR electromagnetic resonance layer is
302GHz.If being operated in other frequencies, can by adjust the size of EMR electromagnetic resonance unit and the number of plies of periodic arrangement come
Realize.
It is described above, only it is the preferable EMR electromagnetic resonance list that one designed according to the present invention is operated in 300GHz specific frequencies
Member, not makees any formal restriction, any those skilled in the art take off possibly also with above-mentioned to the present invention
The technology contents shown are changed or are modified to the equivalent example of equivalent variations, but every without departing from technical solution of the present invention
Hold, any simple modification, equivalent variations and modification that the technical spirit according to the present invention is made to above example is still fallen within
In the range of technical solution of the present invention.
Claims (8)
1. a kind of full angle transparent transmission material of Terahertz frequency range, it is characterised in that：The material is main by EMR electromagnetic resonance layer
Constitute, EMR electromagnetic resonance layer is that the planar array and being coupled by spatial electromagnetic where itself is formed as multiple EMR electromagnetic resonance units.
2. a kind of full angle transparent transmission material of Terahertz frequency range according to claim 1, it is characterised in that：Described
EMR electromagnetic resonance unit includes substrate and is arranged in the endless metal transmission line frame and circular metal disk of substrate top surface, annular
Metal transmission line frame is arranged in substrate top surface surrounding edge, and circular metal disk is arranged in the center of substrate top surface.
3. a kind of full angle transparent transmission material of Terahertz frequency range according to claim 1, it is characterised in that：Described
Multiple EMR electromagnetic resonance units closely arrange array in same plane so that the endless metal transmission line on adjacent EMR electromagnetic resonance unit
Frame is in contact.
4. a kind of full angle transparent transmission material of Terahertz frequency range according to claim 1, it is characterised in that：Described
EMR electromagnetic resonance unit and EMR electromagnetic resonance layer can produce electric resonance and magnetic by electric field and magnetic excitation simultaneously under electromagnetic wave incident
Resonance.
5. a kind of full angle transparent transmission material of Terahertz frequency range according to claim 1, it is characterised in that：Described
Cycle evenly distributed formation EMR electromagnetic resonance in horizontally and vertically two vertical direction of the EMR electromagnetic resonance unit along plane where itself
Layer.
6. a kind of full angle transparent transmission material of Terahertz frequency range according to claim 1, it is characterised in that：Described
EMR electromagnetic resonance layer is in the case where Terahertz frequency range electromagnetic wave any angle is incident, with total transmissivity characteristic under any incident angle.
7. a kind of full angle transparent transmission material of Terahertz frequency range according to claim 1, it is characterised in that：Described
The direction of an electric field of electromagnetic wave can where EMR electromagnetic resonance layer plane any direction, i.e. H mode.
8. a kind of full angle transparent transmission material of Terahertz frequency range according to claim 1, it is characterised in that：The lining
Bottom uses intrinsic high resistant silicon chip, and endless metal transmission line frame and circular metal disk use copper.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109273860A (en) * | 2018-10-18 | 2019-01-25 | 哈尔滨工业大学 | Transmission line type broadband active frequency-selective surfaces |
| CN109888501A (en) * | 2019-02-18 | 2019-06-14 | 黄山学院 | The cellular construction for the topological insulator electromagnetically induced transparent material for polarizing insensitive |
| CN110187338A (en) * | 2019-05-07 | 2019-08-30 | 同济大学 | A kind of broadband transmission matching layer structure |
| CN110380223A (en) * | 2019-07-10 | 2019-10-25 | 浙江大学 | A kind of omnidirectional's perfect matching transparent material meeting uniaxial perfect matching layer model |
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| US20090262766A1 (en) * | 2006-10-19 | 2009-10-22 | Houtong Chen | Active terahertz metamaterial devices |
| CN103268985A (en) * | 2013-04-24 | 2013-08-28 | 同济大学 | Electromagnetic wave beam regulating and controlling device |
| CN105098349A (en) * | 2015-08-26 | 2015-11-25 | 武汉市灵动时代智能技术有限公司 | Ku-band intelligent metamaterial wide-angle wave-transparent frequency-selective antenna cover |
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| US20090262766A1 (en) * | 2006-10-19 | 2009-10-22 | Houtong Chen | Active terahertz metamaterial devices |
| CN103268985A (en) * | 2013-04-24 | 2013-08-28 | 同济大学 | Electromagnetic wave beam regulating and controlling device |
| CN105098349A (en) * | 2015-08-26 | 2015-11-25 | 武汉市灵动时代智能技术有限公司 | Ku-band intelligent metamaterial wide-angle wave-transparent frequency-selective antenna cover |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109273860A (en) * | 2018-10-18 | 2019-01-25 | 哈尔滨工业大学 | Transmission line type broadband active frequency-selective surfaces |
| CN109888501A (en) * | 2019-02-18 | 2019-06-14 | 黄山学院 | The cellular construction for the topological insulator electromagnetically induced transparent material for polarizing insensitive |
| CN110187338A (en) * | 2019-05-07 | 2019-08-30 | 同济大学 | A kind of broadband transmission matching layer structure |
| CN110187338B (en) * | 2019-05-07 | 2021-07-20 | 同济大学 | Broadband transmission matching layer structure |
| CN110380223A (en) * | 2019-07-10 | 2019-10-25 | 浙江大学 | A kind of omnidirectional's perfect matching transparent material meeting uniaxial perfect matching layer model |
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| CN107275792B (en) | 2020-03-27 |
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