CN106654592A - Coding phase gradient metasurface based on Pancharatnam-Berry phase - Google Patents
Coding phase gradient metasurface based on Pancharatnam-Berry phase Download PDFInfo
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- CN106654592A CN106654592A CN201611196945.0A CN201611196945A CN106654592A CN 106654592 A CN106654592 A CN 106654592A CN 201611196945 A CN201611196945 A CN 201611196945A CN 106654592 A CN106654592 A CN 106654592A
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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 invention discloses a coding phase gradient metasurface based on a Pancharatnam-Berry phase. By taking a phase gradient metasurface as a coding unit, internal phase modulation of the coding unit can be realized; by performing modulation on the internal phase gradient in the coding unit, different effects, such as abnormal reflection, focusing, imaging and the like, can be realized; by performing sequential combination on designed coding units with special electromagnetic characteristics, different effects can be generated; according to the coding phase gradient metasurface based on the Pancharatnam-Berry phase, more flexible control on electromagnetic wave can be realized from two aspects of the coding unit and the coding sequence; the coding phase gradient metasurface has the advantages of easy operation in design, convenience in applying, easy processing and manufacturing, and the like; and the ; the coding phase gradient metasurface has significant application prospect in the aspects of antenna, imaging, reduction of radar scattering area, and the like.
Description
Technical field
It is more particularly to a kind of based on Pancharatnam-Berry phase places the present invention relates to electromagnetic material technical field
The super surface of encoding phase gradient.
Background technology
Electromagnetism encodes Meta Materials, also known as digital electromagnetic Meta Materials, because it is by the digital control to electromagnetic wave so as to
It is suggested wide always so far concerned.The super surface of existing coding, typically using different structures, shape, size it is basic
Unit realizes different weakened phase restorings by resonance, and different weakened phase restorings is characterized with binary coding.For example exist
In one bit electromagnetism coding Meta Materials, from two kinds of different elementary cells, its phase difference is basic by two kinds in 180 degree or so
Unit carries out binary coding for coding unit " 0 " and coding unit " 1 ".By coding unit " 0 " and " 1 " according to the sequence for designing
Arranged, it is possible to achieve required function.It is existing to encode super surface, because its weakened phase restoring is to utilize different shape,
The resonance of the construction unit of size is realizing, it is difficult to carry out phase-modulation inside coding unit, therefore coding unit be all by
Equiphase construction unit composition, not with single electromagnetic property.
The content of the invention
A kind of super surface of encoding phase gradient based on Pancharatnam-Berry phase places is embodiments provided,
Problems of the prior art can be solved.
A kind of super surface of encoding phase gradient based on Pancharatnam-Berry phase places, the encoding phase gradient surpasses
Surface is made up of multiple coding units, and each described coding unit is made up of multiple construction units, the phase place of the construction unit
Reply and realized based on Pancharatnam-Berry phase places.
Preferably, the coding unit is realized corresponding according to the phase gradient change for constituting its construction unit
Electromagnetic property.
Preferably, to coding unit each described in all described construction unit carry out the rotation of special angle, realize
The out of phase of the coding unit is replied, and then realizes the binary coding to the coding unit.
The super surface of encoding phase gradient that line phase regulation and control can be entered to coding unit of the present invention, it is this to be based on
The super surface of coding gradient for entering line phase regulation and control to coding unit of Pancharatnam-Berry phase places, in the coding of many bits
In there is very high operability, only need to rotate specific angle to construction unit it is achieved that this is high-resolution to realize
Wave beam complex provides good approach.
Compared with prior art, advantage of the invention is that：
1st, the present invention is that, based on the super surface of coding gradient of Pancharatnam-Berry Signal Phase Designs, weakened phase restoring is put down
Surely, the weakened phase restoring difference between the different anglecs of rotation is fixed, it is easy to realize wide band effect.Designing many bits of encoded
During the super surface of gradient, without considering the parameters such as too many size, shape, only need to rotate specific angle to realize；
2nd, the present invention has carried out the design of phase place inside coding unit, and different Signal Phase Designs can realize different electricity
Magnetic function (such as abnormal reflection, is focused on, imaging etc.), and this design causes more versatile and flexible to the control of electromagnetic wave；
3rd, a kind of super surface of encoding phase gradient that can enter line phase regulation and control to coding unit of present invention design, right
There is certain adjustment effect in the polarization mode of echo wave beam；
4th, design principle of the present invention is simple, easy to process, realizes to electromagnetism in existing ripe process technology
Ripple more flexibly regulates and controls.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is that a kind of encoding phase gradient based on Pancharatnam-Berry phase places provided in an embodiment of the present invention surpasses
The composition structural representation on surface；
Fig. 2 a are the structural representation of the construction unit that the super surface of encoding phase gradient is constituted in Fig. 1；
Fig. 2 b are the schematic diagram of the construction unit anglec of rotation and direction of rotation in Fig. 2 a；
Fig. 3 a are the weakened phase restoring of construction unit different rotation angle under 8-22GHz in Fig. 2 a；
Fig. 3 b are reflection width corresponding with the weakened phase restoring of construction unit different rotation angle under 8-22GHz in Fig. 3 a
Value；
Fig. 4 a are the three-dimensional Far Field Scattering figure that the coding unit that the inside phase gradient calculated with MATLAB is zero is produced；
Fig. 4 b are the three-dimensional Far Field Scattering that the coding unit that the inside phase gradient calculated with MATLAB is not zero is produced
Figure；
Fig. 5 a are the same coded sequences 010101 under 15GHz, and internal phase gradient is the one of zero coding unit composition
The simulation result of the three-dimensional Far Field Scattering figure on the super surface of bits of encoded phase gradient；
Fig. 5 b are the same coded sequences 010101 under 15GHz, the coding unit composition that internal phase gradient is not zero
The simulation result of the three-dimensional Far Field Scattering figure on the super surface of unity bit coding phase gradient；
Fig. 6 a are the same coded sequences 010101/101010 under 15GHz, and internal phase gradient is zero coding unit
The simulation result of the three-dimensional Far Field Scattering figure on the super surface of unity bit coding phase gradient of composition；
Fig. 6 b are the same coded sequences 010101/101010 under 15GHz, the coding list that internal phase gradient is not zero
The simulation result of the three-dimensional Far Field Scattering figure on the super surface of unity bit coding phase gradient of unit's composition.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is a kind of coding phase based on Pancharatnam-Berry phase places provided in the embodiment of the present invention with reference to Fig. 1
The super surface of potential gradient, the super surface 100 of the encoding phase gradient is made up of multiple coding units 200, ФmnIt is each described coding
The weakened phase restoring of unit 200, wherein, m and n represents respectively the coding unit 200 on the super surface 100 of the encoding phase gradient
In line number and columns.Each described coding unit 200 is made up of multiple construction units 300,It is each described construction unit
300 weakened phase restoring, wherein, x and y represents respectively line number and row of the construction unit 300 in the coding unit 200
Number.To each construction unit 300 in each described coding unit 200 in the super surface 100 of the encoding phase gradient
Phase place is modulated so that the coding unit 200 has special electromagnetic property.
Reference picture 2a, the construction unit 300 is Z-type, and specific size is H1=5.2mm, H2=0.65mm, H3=
0.2mm、H4=0.35mm, H5=5mm, H6=3.288mm, H7=0.36mm.It is 3mm in thickness that the construction unit 300 is stamp
F4B (polytetrafluoroethylene (PTFE)) substrate on, and the F4B substrates have metal backing.The construction unit 300 is in the coding
Direction of rotation is for counterclockwise in the plane that unit 200 is located, to realize corresponding weakened phase restoring, α as shown in Figure 2 b.
Reference picture 3a and 3b, it can be seen that weakened phase restoring is very steady, phase difference is very fixed, and reflected amplitudes are equal, so
It is more conducive to realize wide band design, and the coding unit 200 and its internal phase-modulation.
Reference picture 4a and 4b, it can be seen that internal phase gradient be zero the coding unit 200 directly by wave beam original road
Return, and the coding unit 200 that internal phase gradient is not zero there occurs abnormal reflection.Can illustrate to have carried out phase place tune
The coding unit 200 of system there occurs abnormal reflection.
Reference picture 5a and 5b, wherein θ andRespectively reflection angle is described respectively with azimuth, the arrow line in figure is reflected
Reflection angle and the azimuthal definition of reflection, it can be seen that inside has carried out the coding unit 200 of phase-modulation and constituted
The reflected beam on the super surface of encoding phase gradient there occurs the deflection of certain angle.
Reference picture 6a and 6b, it can be seen that inside has carried out the coding phase of the composition of the coding unit 200 of phase-modulation
The reflected beam on the super surface of potential gradient there occurs the deflection of certain angle.
Can be seen that inside according to the result of Fig. 5 a, 5b and Fig. 6 a, 6b has carried out the coding unit of phase-modulation
The super surface of encoding phase gradient of 200 compositions receives coded sequence and the inside phase place of coding unit 200 in reflection electromagnetic wave
The joint effect of gradient.This causes the control to electromagnetic wave more versatile and flexible, it is possible to achieve more complicated electromagnetism regulation and control.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (3)
1. a kind of super surface of encoding phase gradient based on Pancharatnam-Berry phase places, it is characterised in that the coding
The super surface of phase gradient is made up of multiple coding units, and each described coding unit is made up of multiple construction units, the structure
The weakened phase restoring of unit is realized based on Pancharatnam-Berry phase places.
2. the super surface of encoding phase gradient as claimed in claim 1, it is characterised in that the coding unit is according to constituting its
The phase gradient change of the construction unit, realizes corresponding electromagnetic property.
3. the super surface of encoding phase gradient as claimed in claim 1 or 2, it is characterised in that in coding unit each described
All described construction unit carry out the rotation of special angle, the out of phase for realizing the coding unit is replied, and then is realized
Binary coding to the coding unit.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107204524A (en) * | 2017-05-12 | 2017-09-26 | 东南大学 | Artificial electromagnetic surface and its design method based on P B-phase structures |
| CN107658571A (en) * | 2017-09-26 | 2018-02-02 | 中国人民解放军空军工程大学 | Coding absorbing meta-material applied to the reduction of wideband radar reflecting section |
| CN110083934A (en) * | 2019-04-26 | 2019-08-02 | 中国人民解放军空军工程大学 | A kind of super surface design method of electromagnetism based on algorithm of support vector machine |
| CN110165416A (en) * | 2019-06-25 | 2019-08-23 | 复旦大学 | It is absorbed and abnormal deviation double-function device based on the electromagnetic wave perfection that gradient surpasses surface |
| US10690930B1 (en) * | 2016-12-29 | 2020-06-23 | Facebook Technologies, Llc | Optical structure comprising a structure of stacked optical elements that receives circularly polarized light having a first handedness and outputs circularly polarized light having a second handedness to a focal point |
| CN111901014A (en) * | 2020-01-07 | 2020-11-06 | 中兴通讯股份有限公司 | Electromagnetic unit regulation and control method, device, equipment and storage medium |
| US10901205B1 (en) | 2016-08-09 | 2021-01-26 | Facebook Technologies, Llc | Focus adjusting liquid crystal lenses in a head-mounted display |
| US11009765B1 (en) | 2016-11-23 | 2021-05-18 | Facebook Technologies, Llc | Focus adjusting pancharatnam berry phase liquid crystal lenses in a head-mounted display |
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Cited By (13)
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| US10901205B1 (en) | 2016-08-09 | 2021-01-26 | Facebook Technologies, Llc | Focus adjusting liquid crystal lenses in a head-mounted display |
| US11009765B1 (en) | 2016-11-23 | 2021-05-18 | Facebook Technologies, Llc | Focus adjusting pancharatnam berry phase liquid crystal lenses in a head-mounted display |
| US11231593B1 (en) | 2016-12-29 | 2022-01-25 | Facebook Technologies, Llc | Optical structure comprising a plurality of optical elements each configured to convert received light having a first polarization into output light having a second polarization focused to a common focal point |
| US10935804B1 (en) | 2016-12-29 | 2021-03-02 | Facebook Technologies, Llc | Optical structure comprising a plurality of stacked optical elements that receive light having a first polarization and output light having a second polarization to a focal point |
| US10690930B1 (en) * | 2016-12-29 | 2020-06-23 | Facebook Technologies, Llc | Optical structure comprising a structure of stacked optical elements that receives circularly polarized light having a first handedness and outputs circularly polarized light having a second handedness to a focal point |
| CN107204524A (en) * | 2017-05-12 | 2017-09-26 | 东南大学 | Artificial electromagnetic surface and its design method based on P B-phase structures |
| CN107658571B (en) * | 2017-09-26 | 2021-01-15 | 中国人民解放军空军工程大学 | Encoding wave-absorbing metamaterial applied to reduction of reflection section of broadband radar |
| CN107658571A (en) * | 2017-09-26 | 2018-02-02 | 中国人民解放军空军工程大学 | Coding absorbing meta-material applied to the reduction of wideband radar reflecting section |
| CN110083934A (en) * | 2019-04-26 | 2019-08-02 | 中国人民解放军空军工程大学 | A kind of super surface design method of electromagnetism based on algorithm of support vector machine |
| CN110165416A (en) * | 2019-06-25 | 2019-08-23 | 复旦大学 | It is absorbed and abnormal deviation double-function device based on the electromagnetic wave perfection that gradient surpasses surface |
| CN110165416B (en) * | 2019-06-25 | 2021-06-04 | 复旦大学 | Electromagnetic wave perfect absorption and abnormal deflection dual-function device based on gradient super surface |
| CN111901014A (en) * | 2020-01-07 | 2020-11-06 | 中兴通讯股份有限公司 | Electromagnetic unit regulation and control method, device, equipment and storage medium |
| CN111901014B (en) * | 2020-01-07 | 2022-05-10 | 中兴通讯股份有限公司 | Electromagnetic unit regulation and control method, device, equipment and storage medium |
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Application publication date: 20170510 |