CN107453050A - Surpass the broadband lens on surface based on phase gradient - Google Patents
Surpass the broadband lens on surface based on phase gradient Download PDFInfo
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- CN107453050A CN107453050A CN201710469043.8A CN201710469043A CN107453050A CN 107453050 A CN107453050 A CN 107453050A CN 201710469043 A CN201710469043 A CN 201710469043A CN 107453050 A CN107453050 A CN 107453050A
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- metal
- phase gradient
- phase
- length
- lens
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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
-
- 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
- H01Q15/04—Refracting or diffracting devices, e.g. lens, prism comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens
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- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses the broadband lens for surpassing surface based on phase gradient, mainly by square metal paster, be brought into close contact and formed around three super surfaces of phase gradient that the metal Fang Huan of square metal paster is formed.Length of side size by adjusting square metal paster realizes 360 ° of changes of transmission curve phase, realizes phase compensation.The present invention realizes highly transmissive efficiency and the linear change of transmission phase by the square metal paster added metal Fang Huan of individual layer design, and four-layer structure is brought into close contact the bandwidth for having expanded lens.
Description
Technical field
The present invention relates to the broadband lens for surpassing surface based on phase gradient, belong to electromagnetic communication, microwave device technology field.
Background technology
The artificial material that Meta Materials refer to nature in itself and are not present, people design according to electromagnetic theory, has
Unconventional electromagnetic propertys such as negative magnetoconductivity, negative permittivity and zero refractive index.Two dimensional surface feelings of the super surface as Meta Materials
Shape, recent years have turned into focus and the forward position of Meta Materials research field.Analysis based on phase shift planar lens unit use with
The method of transmission-type frequency-selective surfaces-cause, place the cell in uniformly unlimited periodic array in two dimensions analyze its transmission with thoroughly
Penetrate characteristic.
The super surface of phase gradient has transmission focusing, the conversion for propagating wave direction surface wave, polarization conversion, polarization separation, frequency
The exceptional functions such as rate selection, phase regulation and control, wavefront control, in polarization conversion, design high-gain aerial, ultra-thin invisible clothes etc.
There is important application.
The content of the invention
The technical problems to be solved by the invention are：The broadband lens for being surpassed surface based on phase gradient are provided, improve phase
Position compensation ability, enables phase compensation to cover [0 °, 360 °].
The present invention uses following technical scheme to solve above-mentioned technical problem：
Surpass the broadband lens on surface based on phase gradient, including four layers of identical phase gradient metal surface and three it is identical
Substrate, wherein two layers of phase gradient metal surface is etched in the upper and lower surface of a substrate respectively, two layers of phase gradient in addition
Metal surface is etched in wherein in one side of two other substrate respectively；Three substrates are bonded to form the broadband lens, and wide
Upper and lower surface with lens is phase gradient metal surface, is had between two neighboring substrate and only one layer of phase gradient gold
Metal surface, three substrates share same center；
The phase gradient metal surface includes super surface cell, and super surface cell is in parabolic EDS maps, each super table
Face unit is arranged in order by n size identical unit and formed, and each unit includes square metal paster and around square gold
Belong to the metal Fang Huan of paster, the metal Fang Huan length of side is more than the length of side of square metal paster, metal Fang Huan side in all units
Long equal, the length of side gradual change from big to small of square metal paster, and under the frequency of setting, square metal paster maximal side,
Corresponding transmission phase makes the difference equal to 360 ° the minimum length of side respectively, and n is the positive integer more than or equal to 2.
As a preferred embodiment of the present invention, when the n takes 7, gradual change takes the length of side of square metal paster from big to small
It is worth for 7.2mm, 7mm, 6.6mm, 6.2mm, 5.7mm, 4.8mm, 4mm.
As a preferred embodiment of the present invention, the inside and outside length of side of the metal Fang Huan is respectively 7.7mm, 7.9mm.
As a preferred embodiment of the present invention, the length of side of the unit is 8mm.
As a preferred embodiment of the present invention, the material of the substrate is polytetrafluoroethylene (PTFE) F4b.
The present invention compared with prior art, has following technique effect using above technical scheme：
1st, the special construction of broadband lens of the present invention, its frequency selective characteristic is good, and passband is relatively flat, impedance bandwidth compared with
Width, and phase compensation ability can cover [0 °, 360 °], disclosure satisfy that low-loss, the design requirement of broadband lens.
2nd, loaded antenna, energy while Antenna Impedance Matching is not influenceed at a certain distance from lens rear in broadband of the present invention
Enough increase substantially the gain of antenna.
Brief description of the drawings
Fig. 1 is the cellular construction figure for the broadband lens that the present invention surpasses surface based on phase gradient.
Fig. 2 is the front view on the one of surface for the broadband lens that the present invention surpasses surface based on phase gradient.
Fig. 3 is change curve of the 7-11GHz transmission phases with square metal paster length of side p (4.0-7.2mm).
Fig. 4 is that the paster antenna for being operated in 8.2GHz loads e faces directional diagram before and after broadband lens arrangement of the present invention.
Fig. 5 is that the paster antenna for being operated in 9.1GHz loads e faces directional diagram before and after broadband lens arrangement of the present invention.
Fig. 6 is that the paster antenna for being operated in 10GHz loads e faces directional diagram before and after broadband lens arrangement of the present invention.
Embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
The present invention surpasses the broadband lens on surface based on phase gradient, and the one-dimensional Electromgnetically-transparent realized in special frequency band gathers
It is burnt.Size by changing paster realizes the change to transmiting wave phase, and when phase covers [0 °, 360 °] scope, design is closed
The phase gradient of reason, unit is arranged in battle array, you can obtain the two-dimensional transmission phase that can be regulated and controled to Electromgnetically-transparent direction
The super surface of potential gradient.
As shown in figure 1, the broadband lens for being surpassed surface based on phase gradient are made up of square metal paster 1 and metal side's ring 2
Three super surfaces of phase gradient be brought into close contact to be formed, three super surfaces of phase gradient share same center, and the purpose is to open up
The bandwidth of wide lens.Here the super surface of phase gradient includes substrate and the phase gradient metal surface being etched on substrate.This
Broadband lens totally three substrates, four layers of phase gradient metal surface are invented, the upper and lower surface of each substrate has and only one layer of phase
Potential gradient metal surface, i.e., the upper and lower surface of one of substrate are etched with phase gradient metal surface, two other substrate
Phase gradient metal surface is wherein etched with one side, three substrates into intimate fit together to form broadband lens.Substrate 3,
4th, 5 materials are F4b, and surface etches metal structure.
As shown in Fig. 2 phase gradient metal surface is formed by super surface cell in parabolic EDS maps, super surface cell is by 7
Individual size identical unit, which is arranged in order, to be formed, and each unit includes square metal paster and metal Fang Huan, metal side's collar
Around square metal paster, they share same center.This special structure, its frequency selective characteristic is good, and passband is relatively more flat
Smooth, impedance bandwidth is wider, and phase compensation ability can cover [0 °, 360 °], disclosure satisfy that low-loss, the design of broadband lens
Demand.As shown in figure 3, the square metal paster length of side gradual change value etched on the super surface of phase gradient for [4mm, 4.8mm,
5.7mm, 6.2mm, 6.6mm, 7mm, 7.2mm], the purpose is to realize accurately to control transmitted wave wavefront, transmission phase change is covered
Cover [0 °, 360 °], cell size and metal Fang Huan size keep constant.Each unit on the super surface of phase gradient is in difference
Transmission phase curvilinear motion at frequency is slow and collimation is good, meets the requirement of phase difference covering [0 °, 360 °], is advantageous to reality
The existing super surface design in broadband.
In order to test the focusing effect of broadband lens of the present invention, paster antenna is chosen to be tested.Manufactured width
Band with lens a width of 8.2GHz-10GHz, so the paster antenna for choosing 8.2GHz, 9.1GHz, 10GHz is tested, survey
Test result is as shown in Figure 4,5, 6.
Finally be used as it will be appreciated by those skilled in the art that, the present invention in metamaterial structure layer straight linear metallic structure simultaneously
This is not limited to, the line styles such as arc waveform fold-line-shaped can also be designed to, metal patch shape is that polygon, circle etc. are several
What structure.Air dielectric layer can use foam or honeycomb sandwich construction etc..The selection of baseplate material is also nonessential to use F4b, only
Relative dielectric constant and thickness is wanted to meet resonance requirement.
The technological thought of above example only to illustrate the invention, it is impossible to protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, the scope of the present invention is each fallen within
Within.
Claims (5)
1. surpass the broadband lens on surface based on phase gradient, it is characterised in that including four layers of identical phase gradient metal surface
With three identical substrates, wherein two layers of phase gradient metal surface is etched in the upper and lower surface of a substrate respectively, in addition two
Layer phase gradient metal surface is etched in wherein in one side of two other substrate respectively；Three substrates are bonded to form the broadband
Lens, and the upper and lower surface of broadband lens is phase gradient metal surface, have and only one layer of phase between two neighboring substrate
Potential gradient metal surface, three substrates share same center；
The phase gradient metal surface includes super surface cell, and super surface cell is in parabolic EDS maps, and each super surface is single
Member is arranged in order by n size identical unit to be formed, and each unit includes square metal paster and pasted around square metal
The metal Fang Huan of piece, metal the Fang Huan length of side are more than the length of side of square metal paster, metal Fang Huan length of side phase in all units
Deng, the length of side gradual change from big to small of square metal paster, and under the frequency of setting, square metal paster maximal side, minimum
Corresponding transmission phase makes the difference equal to 360 ° the length of side respectively, and n is the positive integer more than or equal to 2.
2. surpass the broadband lens on surface based on phase gradient according to claim 1, it is characterised in that when the n takes 7, side
Gradual change value is 7.2mm, 7mm, 6.6mm, 6.2mm, 5.7mm, 4.8mm, 4mm to the length of side of shape metal patch from big to small.
3. surpass the broadband lens on surface based on phase gradient according to claim 1, it is characterised in that the metal Fang Huan's
The inside and outside length of side is respectively 7.7mm, 7.9mm.
4. surpass the broadband lens on surface based on phase gradient according to claim 1, it is characterised in that the length of side of the unit
For 8mm.
5. surpass the broadband lens on surface based on phase gradient according to claim 1, it is characterised in that the material of the substrate
For polytetrafluoroethylene (PTFE) F4b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710469043.8A CN107453050A (en) | 2017-06-20 | 2017-06-20 | Surpass the broadband lens on surface based on phase gradient |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710469043.8A CN107453050A (en) | 2017-06-20 | 2017-06-20 | Surpass the broadband lens on surface based on phase gradient |
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| CN107453050A true CN107453050A (en) | 2017-12-08 |
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| CN201710469043.8A Pending CN107453050A (en) | 2017-06-20 | 2017-06-20 | Surpass the broadband lens on surface based on phase gradient |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470984A (en) * | 2018-03-13 | 2018-08-31 | 哈尔滨工业大学 | The lens and method of Airy wave beam are generated based on the discontinuous super surface of phase |
| CN108777367A (en) * | 2018-05-29 | 2018-11-09 | 南京理工大学 | A kind of insensitive super surface array of electromagnetic camouflage of X-band polarization |
| CN109390701A (en) * | 2018-11-28 | 2019-02-26 | 中国矿业大学 | A kind of X-band high-gain broadband lens antenna based on the super surface texture of phase gradient multilayer |
| CN109728395A (en) * | 2018-12-19 | 2019-05-07 | 西安电子科技大学 | A kind of space wave directional coupler based on super surface |
| CN109802242A (en) * | 2019-03-05 | 2019-05-24 | 南京理工大学 | Super surface lens |
| CN109799611A (en) * | 2019-01-29 | 2019-05-24 | 中山大学 | A kind of design method and its super structure lens of achromatism of the super structure lens of achromatism |
| CN112803171A (en) * | 2019-11-14 | 2021-05-14 | 南京理工大学 | Electromagnetic lens with miniaturized frequency selective surface |
| CN113485009A (en) * | 2020-04-24 | 2021-10-08 | 浙江舜宇光学有限公司 | Super surface imaging device |
| CN113540813A (en) * | 2021-07-21 | 2021-10-22 | 北京环境特性研究所 | High-numerical-aperture microwave super-surface lens and design method thereof |
| CN114284746A (en) * | 2021-12-02 | 2022-04-05 | 重庆邮电大学 | Super surface array of double-deck multi-frequency point focusing lens |
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| CN104752840A (en) * | 2015-04-08 | 2015-07-01 | 东南大学 | Terahertz broadband random surface |
| CN105789906A (en) * | 2016-03-03 | 2016-07-20 | 电子科技大学 | 2D phase gradient super-surface composite structure |
| US20170146806A1 (en) * | 2015-11-20 | 2017-05-25 | The Board Of Trustees Of The Leland Stanford Junior University | Light-field Imaging Using a Gradient Metasurface Optical Element |
| CN107171065A (en) * | 2017-05-05 | 2017-09-15 | 南京邮电大学 | A kind of new broadband low section dielectric lens antenna |
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| CN104752840A (en) * | 2015-04-08 | 2015-07-01 | 东南大学 | Terahertz broadband random surface |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470984A (en) * | 2018-03-13 | 2018-08-31 | 哈尔滨工业大学 | The lens and method of Airy wave beam are generated based on the discontinuous super surface of phase |
| CN108777367A (en) * | 2018-05-29 | 2018-11-09 | 南京理工大学 | A kind of insensitive super surface array of electromagnetic camouflage of X-band polarization |
| CN109390701A (en) * | 2018-11-28 | 2019-02-26 | 中国矿业大学 | A kind of X-band high-gain broadband lens antenna based on the super surface texture of phase gradient multilayer |
| CN109728395B (en) * | 2018-12-19 | 2020-09-22 | 西安电子科技大学 | Spatial wave directional coupler based on super surface |
| CN109728395A (en) * | 2018-12-19 | 2019-05-07 | 西安电子科技大学 | A kind of space wave directional coupler based on super surface |
| CN109799611A (en) * | 2019-01-29 | 2019-05-24 | 中山大学 | A kind of design method and its super structure lens of achromatism of the super structure lens of achromatism |
| CN109802242A (en) * | 2019-03-05 | 2019-05-24 | 南京理工大学 | Super surface lens |
| CN112803171A (en) * | 2019-11-14 | 2021-05-14 | 南京理工大学 | Electromagnetic lens with miniaturized frequency selective surface |
| CN112803171B (en) * | 2019-11-14 | 2022-08-12 | 南京理工大学 | Electromagnetic lens with miniaturized frequency selective surface |
| CN113485009A (en) * | 2020-04-24 | 2021-10-08 | 浙江舜宇光学有限公司 | Super surface imaging device |
| CN113485009B (en) * | 2020-04-24 | 2023-07-18 | 浙江舜宇光学有限公司 | Super-surface imaging device |
| CN113540813A (en) * | 2021-07-21 | 2021-10-22 | 北京环境特性研究所 | High-numerical-aperture microwave super-surface lens and design method thereof |
| CN114284746A (en) * | 2021-12-02 | 2022-04-05 | 重庆邮电大学 | Super surface array of double-deck multi-frequency point focusing lens |
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Application publication date: 20171208 |
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