CN110336136A - A kind of suction wave/stealthy Meta Materials of scattering integration - Google Patents
A kind of suction wave/stealthy Meta Materials of scattering integration Download PDFInfo
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- CN110336136A CN110336136A CN201910703871.2A CN201910703871A CN110336136A CN 110336136 A CN110336136 A CN 110336136A CN 201910703871 A CN201910703871 A CN 201910703871A CN 110336136 A CN110336136 A CN 110336136A
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/007—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with means for controlling the absorption
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Abstract
The invention discloses a kind of suction wave/stealthy Meta Materials of scattering integration, belong to camouflage material technology field, including the second metamaterial layer, third substrate, the first metamaterial layer, tetrabasal and the metal plate bottom set gradually along electromagnetic propagation direction, first metamaterial layer includes the first absorbing meta-material of man-made microstructure and printing on the first substrate of first substrate, arrangement on the first substrate；Second metamaterial layer includes the second absorbing meta-material of the second substrate and printing on the second substrate, and the second man-made microstructure unit is corresponding with the described first artificial microstructure unit position；The present invention, which is realized, effectively combines absorbing meta-material with super surface by optimizing structure design the comprehensive regulation for inhaling wave and scattering, extends the frequency band of the two；Ultra wide band, efficient reduction, lightweight and ultra-thin characteristic make the present invention have higher value in practical applications.
Description
Technical field
The invention belongs to camouflage material technology fields, and in particular to a kind of suction wave/stealthy Meta Materials of scattering integration.
Background technique
With the continuous development and application of the radar exploration technique, seem more heavy for the electromagnetism stealth technology of radar detection
It wants.Currently, the radar stealth technology of comparative maturity mainly has shape stealthy and coating radar absorbing is stealthy.Shape is stealthy i.e.
By reasonable configuration design by incident radar wave deviation to non-threat direction, but the change of outer shape will affect flight
The aeroperformance of device.Stealth technology based on coating radar absorbing is the wave by the radar for emitting detection radar with heat
Can form lose, but this technology is higher to the thickness requirement of material causes thickness heavier.Therefore new there is an urgent need to develop
The electromagnetism stealth technology of type.Novel manual electromagnetic material, also known as electromagnetism Meta Materials, it refer to it is some have in nature directly obtain
The artificial composite structure or composite material of unconventional physical property not available for the material taken, usually have " sub-wavelength
The physical features such as size " and " EFFECTIVE MEDIUM ".Since electromagnetism Meta Materials may be implemented flexibly to regulate and control electromagnetic wave, the super material of electromagnetism
Material has shown great application value in terms of electromagnetism stealth, the extensive concern by domestic and international military field.
The Liang Ge branch of electromagnetic wave absorption Meta Materials and the super surface of electromagnetism as electromagnetism Meta Materials, all has in terms of electromagnetism stealth
There is higher application value.Electromagnetic wave absorption Meta Materials refer to through the dielectric loss of material itself, magnetic loss or conduction loss,
Electromagnetic wave energy is converted to thermal energy and is depleted.The super surface of electromagnetism is the Meta Materials under two dimensional form, it is by two-dimentional sub-
What wavelength or deep sub-wavelength structure cell array formed.Pass through the reflection and transmission of the super surface resonance unit to sub-wavelength structure
Amplitude and phase space distribution modulation can be achieved to reflect and transmission wave beam wave surface, polarization mode, the direction of propagation, biography
Broadcast freely regulating and controlling for mode etc..In addition, by the way that electromagnetism is surpassed the super surface of coding that surface is combined with binary coding, Ke Yishi
Now to the Digital Control of electromagnetic wave.For example, selecting two kinds of phase differences is the substantially single of 180 degree or so for unity bit coding
Member is separately encoded as binary coding unit " 0 " and " 1 ".By by coding unit " 0 ", " 1 " according to different code sequences
Column arrangement, may be implemented different functions.Since electromagnetic wave absorption Meta Materials and the super surface of electromagnetism can be modulated electromagnetic wave,
So they can be used in the reduction of radar cross section.
However, the above two design about Meta Materials regulation electromagnetic wave is mainly one-sided ground electromagnetic wave absorption or regulation
Direction of wave travel is reflected, and the comprehensive regulation to electro-magnetic wave absorption and scattering is not implemented.
Summary of the invention
The present invention provides a kind of suction wave/stealthy Meta Materials of scattering integration, solve above-mentioned technical problem.
It is an object of the present invention to provide a kind of suction wave/stealthy Meta Materials of scattering integration, including successively along electromagnetic propagation direction
The second metamaterial layer, third substrate, the first metamaterial layer, tetrabasal and the metal plate bottom being arranged；
Multiple first man-made microstructures that first metamaterial layer includes first substrate, is arranged on the first substrate
Unit, the first artificial microstructure unit include arrangement man-made microstructure on the first substrate and are printed on described the
The first absorbing meta-material on one substrate；
Second metamaterial layer includes the multiple second artificial micro- knots of the second substrate and arrangement on the second substrate
Structure unit, the second man-made microstructure unit are printing the second absorbing meta-material on the second substrate, described second
Man-made microstructure unit and the described first artificial microstructure unit along electromagnetic propagation direction position it is corresponding.
Preferably, the man-made microstructure is S-shaped, and the first substrate prints respectively in the man-made microstructure four corners
It is formed with first absorbing meta-material.
Preferably, second absorbing meta-material and first absorbing meta-material are in the position pair along electromagnetic propagation direction
It answers.
Preferably, the man-made microstructure is that the metal for being attached to the first substrate surface is carved by printed-board technology
Structure.
Preferably, first absorbing meta-material and second absorbing meta-material are resistive film.
Preferably, the sheet resistance of the resistive film is 90~110 Ω/sq.
Preferably, the first substrate and the second substrate are the FR4 substrate with a thickness of 0.1mm.
Preferably, the third substrate and the tetrabasal are the PMI foam base plate with a thickness of 1~3mm.
Compared with prior art, the present invention has the following advantages:
(1) present invention is realized to the comprehensive regulation for inhaling wave and scattering, rather than one-side suction wave or scattering, by excellent
Change structure design, effectively combine absorbing meta-material with super surface, extends the frequency band of the two, realize in 7.6-
The radar cross section of 41.9GHz ultra wide band is reduced；It additionally can be by adjusting the sheet resistance of resistive film and the coding on super surface
Mode realize to the more flexible control of electromagnetic wave thering is wide application space in stealth technology；
(2) present invention will inhale wave and scattering combines, and while realizing ultra wide band reduction, also achieve more efficiently
Reduction, simulation result shows to realize the reduction of 15dB or more in 8.7-27.9GHz and 31.4-39.4GHz；
(3) present invention realizes ultra wide band, efficient contracting in the design process using the PMI foam of lightweight as substrate
Subtract, lightweight and ultra-thin characteristic make the design in practical applications and have higher value；
(4) there is highly developed processing skill on resistive film absorbing meta-material employed in the present invention and super surface at present
Art, preparation is simple and processing cost is lower.
Detailed description of the invention
Fig. 1 is suction wave provided by the invention/stealthy metamaterial structure schematic diagram of scattering integration；
Fig. 2 is each functional layer concrete structure schematic diagram of Fig. 1；Wherein: (a) be integral unit structure schematic three dimensional views；(b)
It is the first artificial microstructure unit surface texture schematic diagram, intermediate S-shaped region is metal structure, and four squares of vertex are
Resistive film is (c) the second man-made microstructure cell surface structural schematic diagram；
Fig. 3 is same polarization simulation curve；Wherein: (a) be metal structure different rotation angle same polarization reflected amplitudes,
(b) be metal structure different rotation angle same polarization reflected phase；
Fig. 4 is the super surface of unity bit coding that different coding unit forms and resistive film integral structure in 12GHz and 35GHz
Three-dimensional far field simulation result；Wherein: (a) be 12GHz coded sequence be 0101 .../1010 ... chessboard phase integral structure
Three-dimensional far field analogous diagram, be (b) three-dimensional far field analogous diagram in 12GHz coded sequence random phase integral structure, be (c)
The three-dimensional far field analogous diagram of/1010 ... chessboard phase integral structure that 35GHz coded sequence is 0101 ..., is compiled in 35GHz
The three-dimensional far field analogous diagram of code sequence random phase integral structure；
Fig. 5 is that chessboard phase and random phase are imitative with the radar cross section with size metallic plate within the scope of 7-42GHz
True result；
Fig. 6 is the specular reflectivity test result of random phase distribution samples.
Detailed description of the invention:
1, the first metamaterial layer, the 2, second metamaterial layer, 3, third substrate, 4, tetrabasal, 5, metal plate bottom.
Specific embodiment
In order to enable those skilled in the art to more fully understand, technical solution of the present invention is practiced, below with reference to specific
The invention will be further described for embodiment and attached drawing, but illustrated embodiment is not as a limitation of the invention.
A kind of suction wave/stealthy Meta Materials of scattering integration, as shown in Fig. 1 and Fig. 2 a, including successively along electromagnetic propagation direction
(thickness can be the PMI foam base plate of 1~3mm, be herein 2mm), first for the second metamaterial layer 2 for being arranged, third substrate 3
(thickness can be the PMI foam base plate of 1~3mm, be herein 2mm) and metal plate bottom 5 for metamaterial layer 1, tetrabasal 4
(with a thickness of the metal plate of 0.017mm)；First metamaterial layer 1 include first substrate (with a thickness of the FR4 substrate of 0.1mm),
The multiple first artificial microstructure units being arranged on the first substrate, the first artificial microstructure unit include being arranged in
Man-made microstructure on the first substrate (carves the metal knot for being attached to the first substrate surface by printed-board technology
Structure is S-shaped) and print the first absorbing meta-material on the first substrate (the first absorbing meta-material is distributed in metal structure
Quadrangle, to guarantee to inhale the synergistic action effect of wave and scattering)；Second metamaterial layer 2 include the second substrate (with a thickness of
The FR4 substrate of 0.1mm) and arrangement multiple second man-made microstructure units on the second substrate, described second is artificial micro-
Structural unit is printing the second absorbing meta-material on the second substrate, the second man-made microstructure unit and described the
For one man-made microstructure unit in the position correspondence along electromagnetic propagation direction, first absorbing meta-material and the second suction wave are super
Material is resistive film, and the sheet resistance of resistive film can be 90~110 Ω/sq, herein preferably 100 Ω/sq, and described second inhales the super material of wave
Material with first absorbing meta-material along electromagnetic propagation direction position it is corresponding, and the first absorbing meta-material print area be less than
Second absorbing meta-material (Fig. 2 b and Fig. 2 c).
We detect above-mentioned suction wave/stealthy Meta Materials of scattering integration below, further illustrate that the present invention provides
Suction wave/stealthy Meta Materials performance of scattering integration.
The same polarization reflected amplitudes that metal structure different rotation angle is detected by CST business simulation software emulation, imitative
During true, the boundary condition in the direction x and y is set as " unit cell ", and the direction z is set as " open add space "；From Fig. 3 (a)
Simulation result can be seen that in the like-polarized reflected amplitudes of 7.7-19.7GHz all 0.7 or more, reflect width in conjunction with cross polarization
It is worth simulation result, it can be deduced that mainly at low frequency, the suction wave of resistive film acts on high frequency treatment for the polarization conversion effect on super surface,
It can also be seen that the angle that metal rotation is different, like-polarized reflected amplitudes are barely affected；Fig. 3 (b) is metal structure
The same polarization reflected phase of different rotation angle, it can be seen that phase difference is all very stable in entire frequency band.
Three-dimensional far field analogous diagram is obtained by CST business simulation software emulation, in simulation process, the direction x, y and z
Boundary condition be all set as " open add space ", incidence wave is set as left-handed polarization plane wave, Fig. 4 (a) be at 12GHz,
Coded sequence is 0101 .../1010 ... chessboard phase the super surface of coding and resistive film integral structure the emulation of three-dimensional far field
Figure, it can be seen that wave beam is split into four beams to reduce the energy in echo direction；Fig. 4 (b) is the random coded at 12GHz
The three-dimensional far field analogous diagram on the coding super surface and resistive film integral structure of sequence, it can be seen that wave beam is by random reflected to space
All directions, it can be seen that encode super surface at low frequency and play main function, while resistive film also functions to certain suction wave
Effect；Likewise, the three-dimensional far field simulation result both at 35GHz is respectively such as Fig. 4 (c) and (d) shown, it can be seen that coding
Equally also there is certain effect on super surface in high frequency treatment, this is because resistive film is by after most of electro-magnetic wave absorptions, super surface pair
Unabsorbed electromagnetic wave role, therefore, super surface and resistive film all play the role of in entire frequency band.
Radar cross section simulation result is obtained by CST business simulation software emulation, in simulation process, x, y
It is all set as " open add space " with the boundary condition in the direction z, incidence wave is left-handed polarization plane wave, and Fig. 5 is chessboard phase
Radar cross section simulation result with random phase within the scope of 7-42GHz and with size metallic plate, it can be seen from the figure that
Chessboard phase is almost the same with the reduction effect of random phase, realizes 10dB's or more in 7.6-41.9GHz radar cross section
Reduction, wherein realizing the reduction of 15dB or more, this ultra wide band and efficient contracting in 8.7-27.9GHz and 31.4-39.4GHz
Reduction fruit is realized by suction wave and scattering collective effect.
The test of specular reflectivity is carried out in microwave dark room, and sample is put in ground, transmitting and received loudspeaker day
Line is placed in right above sample at about 2 meters, the metal plate of equidimension is placed on to the underface of electromagnetic horn first, by mirror surface at this time
Reflectivity is normalized, and sample is then placed on position identical with metal plate, and the mirror surface that can measure the sample is anti-
Penetrate rate；Fig. 6 is the specular reflectivity test result of random phase distribution samples, it can be seen from the figure that specular reflectivity exists
15dB or less is nearly all within the scope of 8.1-42GHz.
In conclusion the present invention is realized to the comprehensive regulation for inhaling wave and scattering, rather than one-side suction wave or scattering,
By optimizing structure design, effectively absorbing meta-material is combined with super surface, extends the frequency band of the two, realize
7.6-41.9GHz the radar cross section of ultra wide band is reduced；Additionally can by adjust resistive film sheet resistance and super surface
Coding mode realize to the more flexible control of electromagnetic wave thering is wide application space in stealth technology；This hair
It is bright to inhale wave and scattering and combine, while realizing ultra wide band reduction, also achieve more efficient reduction, simulation result
Show to realize the reduction of 15dB or more in 8.7-27.9GHz and 31.4-39.4GHz；The present invention utilizes gently in the design process
The PMI foam of matter realizes ultra wide band, efficient reduction, lightweight and ultra-thin characteristic make the design in reality as substrate
There is higher value in.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within be also intended to include these modifications and variations.
Claims (8)
1. a kind of suction wave/the stealthy Meta Materials of scattering integration, which is characterized in that including set gradually along electromagnetic propagation direction the
Two metamaterial layers, third substrate, the first metamaterial layer, tetrabasal and metal plate bottom；
Multiple first man-made microstructure lists that first metamaterial layer includes first substrate, is arranged on the first substrate
Member, the first artificial microstructure unit include the man-made microstructure arranged on the first substrate and are printed on described first
The first absorbing meta-material on substrate；
Second metamaterial layer includes the multiple second man-made microstructure lists of the second substrate and arrangement on the second substrate
Member, the second man-made microstructure unit are the second absorbing meta-material of printing on the second substrate；Described second is artificial
Microstructure unit and the described first artificial microstructure unit along electromagnetic propagation direction position it is corresponding.
2. the suction wave according to claim 1/stealthy Meta Materials of scattering integration, which is characterized in that the man-made microstructure
For S-shaped, and the first substrate is printed with first absorbing meta-material in the man-made microstructure four corners respectively.
3. the suction wave according to claim 2/stealthy Meta Materials of scattering integration, which is characterized in that described second, which inhales wave, surpasses
Material and first absorbing meta-material along electromagnetic propagation direction position it is corresponding.
4. the suction wave according to claim 1/stealthy Meta Materials of scattering integration, which is characterized in that the man-made microstructure
It is that the metal structure for being attached to the first substrate surface is carved by printed-board technology.
5. the suction wave according to claim 1/stealthy Meta Materials of scattering integration, which is characterized in that described first, which inhales wave, surpasses
Material and second absorbing meta-material are resistive film.
6. the suction wave according to claim 5/stealthy Meta Materials of scattering integration, which is characterized in that the side of the resistive film
Resistance is 90~110 Ω/sq.
7. suction wave according to claim 1/the stealthy Meta Materials of scattering integration, which is characterized in that the first substrate and
The second substrate is the FR4 substrate with a thickness of 0.1mm.
8. suction wave according to claim 1/the stealthy Meta Materials of scattering integration, which is characterized in that the third substrate and
The tetrabasal is the PMI foam base plate with a thickness of 1~3mm.
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| CN112951347A (en) * | 2021-02-02 | 2021-06-11 | 北京大学 | Topological optimization method of super surface and topological super surface wave-absorbing structure |
| CN112993584A (en) * | 2021-02-05 | 2021-06-18 | 上海大学 | Intelligent stealth super surface capable of sensing electromagnetic energy |
| CN113285234A (en) * | 2021-05-21 | 2021-08-20 | 中国人民解放军军事科学院国防科技创新研究院 | 8-14 GHz-waveband efficient wave-absorbing superstructure surface material |
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| CN113285234B (en) * | 2021-05-21 | 2022-06-17 | 中国人民解放军军事科学院国防科技创新研究院 | 8 ~ 14GHz wave band high efficiency wave-absorbing superstructure surface material |
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