CN106169657A - A kind of surface-creeping w ave absorber coatings structure - Google Patents
A kind of surface-creeping w ave absorber coatings structure Download PDFInfo
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- CN106169657A CN106169657A CN201610737148.2A CN201610737148A CN106169657A CN 106169657 A CN106169657 A CN 106169657A CN 201610737148 A CN201610737148 A CN 201610737148A CN 106169657 A CN106169657 A CN 106169657A
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- creeping
- ave
- ripple layer
- absorber coatings
- suction ripple
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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
- H01Q17/002—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using short elongated elements as dissipative material, e.g. metallic threads or flake-like particles
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Abstract
The invention discloses a kind of surface-creeping w ave absorber coatings structure, it is coated in target surface, this coating structure comprises bond from the inside to the outside from target surface the suction ripple layer arranged and conductive reflective, electro-magnetic wave absorption that target surface can be creeped by this suction ripple layer also changes into heat energy, this conductive reflective has reflection, can suppress to enter into the electromagnetic wave of creeping inhaled in ripple layer to external radiation；The material of this suction ripple layer has impedance operator, so that electromagnetic wave of creeping as often as possible enters suction ripple layer.The surface-creeping w ave absorber coatings structure that the present invention provides eliminates the more thorough of the electromagnetic wave of surface creep, thus greatly reduces the Creeping Wave impact on antenna, it is ensured that the high efficiency of antenna；And the thickness of the coating of the present invention and the most more conventional coating of width are greatly decreased, it is adaptable to wide surface Creeping Wave absorbing state.
Description
Technical field
The present invention is directed in military affairs or surface-creeping w ave technology for eliminating that civilian middle electromagnetic scattering, electromagnetic compatibility etc. relate to neck
Territory, is specifically related to a kind of surface-creeping w ave absorber coatings structure.
Background technology
When electromagnetic wave is with low-angle glancing incidence to target surface, a kind of electromagnetic wave creeped along target surface will be formed,
This electromagnetic wave will bring the new problems such as new electromagnetic scattering, electromagnetic interference.The most militarily, deposit due to equipment surface
In discontinuous feature, such as edge, cusp, gap, step and medium discontinuous edge etc., surface creep electromagnetic wave runs into these
Weak scattering center, after main scattering source is inhibited, the Backscatter intensity of these scattering centers will be formed after discontinuous feature
More than more than the 10% of total scatter intensity may be accounted for.Therefore, eliminate surface-creeping w ave have great importance and apply
It is worth.
The existing design of absorbing material overwhelming majority is both for absorbing the electromagnetic wave of vertical incidence, and for sorbent surface
The absorber coatings research of electromagnetic wave of creeping is less, and such as open invention, " NZFO-PZT sections Magnet electroceramics composite nano fiber is micro-
Wave absorbent, absorber coatings and preparation method " (publication number: CN104164708A), " a kind of painting prepared by Nano graphite powder body
Apply formula absorbing material and preparation method thereof " (publication number: CN104845044A), " low frequency and frequency electromagnetic waves can be absorbed simultaneously
Composite fibre and preparation method thereof " (publication number: CN105113217A), " a kind of carbon nickel coat nano-particle/silicones composite wave-absorbing
Coating and preparation method thereof (publication number: CN105176384A) " etc., these close about invention and the existing research of microwave absorbing coating
Note point all concentrates in the different electromagnetic absorption agent of research and development and microwave absorbing coating compound method, and the object that research absorbs is all vertical
The electromagnetic wave irradiated, without regard to sorbent surface Creeping Wave.Open invention " device of a kind of antenna surface Creeping Wave of decaying " is (public
The number of opening: CN102810743A) propose the device of a kind of antenna surface Creeping Wave of decaying, it includes antenna and meta-material thin film
Layer, arranges meta-material thin film layer in antenna surface, and meta-material thin film layer is made up of multiple Meta Materials graded beddings, by changing super material
The refractive index of material thin layer decays the Creeping Wave that antenna surface occurs, thus greatly reduces the Creeping Wave impact on antenna, protects
The high efficiency of card antenna.The Creeping Wave absorbing membrane layer of this invention research, structure is complicated, application is with strong points, inapplicable
In wide surface Creeping Wave absorbing state.
Summary of the invention
It is an object of the invention on the basis of existing microwave absorbing coating, it is provided that a kind of surface-creeping w ave absorber coatings structure,
For eliminating the thinking that surface creep electromagnetic wave provides new, promote military upper or civilian middle electromagnetic scattering suppression technology and electromagnetism anti-dry
Disturb the development of technology.
For reaching above-mentioned purpose, the invention provides a kind of surface-creeping w ave absorber coatings structure, it is coated in object table
Face, this coating structure comprises from target surface the suction ripple layer and conductive reflective arranged that bond from the inside to the outside, and this suction ripple layer can be by
Electro-magnetic wave absorption that target surface is creeped also changes into heat energy, and this conductive reflective has reflection, can suppress to enter into suction
Electromagnetic wave of creeping in ripple layer is to external radiation；The material of described suction ripple layer has impedance operator, so that electromagnetic wave of creeping is tried one's best many
Ground enters inhales ripple layer.
Above-mentioned surface-creeping w ave absorber coatings structure, wherein, the described material inhaling ripple layer also has loss characteristic, with
Guarantee that the electromagnetic wave of creeping entering suction ripple layer can be completely absorbed.
Above-mentioned surface-creeping w ave absorber coatings structure, wherein, described suction ripple layer selects magnetic loss type absorbing material.
Above-mentioned surface-creeping w ave absorber coatings structure, wherein, the described material inhaling ripple layer comprise substrate binding agent and
Soft magnetic metal powder, this soft magnetic metal powder volume percent range in whole suction ripple layer is 25%～35%.
Above-mentioned surface-creeping w ave absorber coatings structure, wherein, described soft magnetic metal powder selects carbonyl iron dust, nickel
Any one in powder, cobalt powder.
Above-mentioned surface-creeping w ave absorber coatings structure, wherein, described soft magnetic metal powder is sheet shape.
Above-mentioned surface-creeping w ave absorber coatings structure, wherein, described substrate binding agent selects epoxy resin.
Above-mentioned surface-creeping w ave absorber coatings structure, wherein, described conductive reflective comprises substrate binding agent and leads
Electricity granule, this conductive particle volume percent range in whole conductive reflective is 35%～45%, conductive reflective
Thickness range is 30 μm～50 μm.
Above-mentioned surface-creeping w ave absorber coatings structure, wherein, described conductive particle is metal material granule, selects copper
Or any one in silver.
The ripple layer of inhaling of bottom is the main functionality layer of the surface-creeping w ave absorber coatings that the present invention proposes, can be by by this layer
Surface electromagnetic wave absorbs and changes into heat energy.In order to realize the good absorption to electromagnetic wave of creeping, the material inhaling ripple layer should be use up
Amount meets two conditions: one is the impedance operator inhaling ripple layer, it is ensured that electromagnetic wave of creeping can as often as possible enter suction ripple layer；Two are
Inhale the loss characteristic of ripple layer, it is ensured that the electromagnetic wave of creeping entering suction ripple layer can be completely absorbed.The table that the present invention is proposed
Face Creeping Wave absorber coatings, the impedance operator inhaling ripple layer seems the most crucial.Because having conductive reflective inhaling ripple layer surface, enter
The electromagnetic wave of creeping entering to inhale ripple layer cannot can only be inhaled ripple layer progressively consumed to external radiation.Owing to inhaling the thickness of ripple layer in engineering
Degree and width are the most limited, and therefore, the loss characteristic inhaling ripple layer is also the key of surface-creeping w ave absorber coatings absorbent properties.
Common electromagnetic-wave absorbent can be divided into three major types: resistance loss type, dielectric loss type and magnetic loss type, due to magnetic
The loss-type good absorbing effect to electromagnetic wave, can realize good broadband absorbing effect, therefore, in work under little depth information
In journey, coating is widely used.In the surface-creeping w ave absorber coatings that the present invention proposes, inhale ripple layer and also select to use magnetic loss
Consumption type absorbing material, it typically adds soft magnetic metal powder by (such as epoxy resin) in basad binding agent and obtains, such as carbonyl
Base iron powder, nikel powder, cobalt powder etc..In order to obtain more preferable complex permeability, improve the absorbability inhaling ripple layer, also can be selected for sheet shape gold
Belong to powder as electromagnetic absorption agent.
The conductive layer on surface is the auxiliary functional layers of the surface-creeping w ave absorber coatings that the present invention proposes, and it does not possess table
The function of face Creeping Wave sorption enhanced.But conductive layer has strong reflection to electromagnetic wave, can suppress to enter into suction
Electromagnetic wave of creeping in ripple layer is to external radiation, thus strengthens the suction ripple layer assimilation effect to surface-creeping w ave.Pass through surface conductive layer
Use, good effect of can bringing that the applied thickness inhaling ripple layer is thin, application width is narrow, absorbing property is strong etc., this will carry
Come important economic benefit and application value in army.Conductive layer is typically prepared by interpolation conductive particle in basad binding agent
Obtaining, conventional conductive particle has metal material granule, such as copper or Argent grain etc..
The surface-creeping w ave absorber coatings structure that the present invention provides eliminates the more thorough of the electromagnetic wave of surface creep, thus
Greatly reduce the Creeping Wave impact on antenna, it is ensured that the high efficiency of antenna；And the thickness of the coating of the present invention and width the most normal
Rule coating is greatly decreased, it is adaptable to wide surface Creeping Wave absorbing state.
Accompanying drawing explanation
Fig. 1 is a kind of surface-creeping w ave absorber coatings structure and working principle schematic diagram of the present invention.
Fig. 2 is the ball cone Simulation Calculation of the present invention: (a) is without step；B () has step；The table of (c) coating present invention
Face Creeping Wave absorber coatings.
With or without step ball cone mono-static RCS simulation result comparison diagram when Fig. 3 is different polarized electromagnetic wave irradiation.
Fig. 4 is to inhale ripple layer reflectance at 10GHz with thickness profiles.
Fig. 5 be applied thickness be 0.5mm, width is respectively this of 6.25mm, 11.25mm, 16.25mm and 21.25mm
After bright surface-creeping w ave absorber coatings, with the ball cone mono-static RCS simulation result of step.
Fig. 6 be application width be 11.25mm, thickness is respectively the table of the present invention of 0.3mm, 0.5mm, 0.7mm and 0.9mm
After the Creeping Wave absorber coatings of face, with the ball cone mono-static RCS simulation result of step.
Fig. 7 is that the surface-creeping w ave absorber coatings (thickness be 0.3mm, width be 11.25mm) of the coating present invention is with conventional
Coating (thickness be 0.4mm, width be 30mm) and uncoated coating, the ball cone mono-static RCS simulation calculation with step is tied
Really comparison diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, by specific embodiment, the invention will be further described, and these embodiments are merely to illustrate
The present invention, is not limiting the scope of the invention.
As it is shown in figure 1, be a kind of surface-creeping w ave absorber coatings structure of the present invention, it is coated in the surface of target 10,
This coating structure comprises bond from the inside to the outside from target 10 surface the suction ripple layer 20 arranged and conductive reflective 30, this suction ripple layer 20
The electromagnetic wave (i.e. surface-creeping w ave 40) that can be creeped by target surface absorbs and changes into heat energy, and this conductive reflective 30 has instead
Penetrate effect, can suppress to enter into the electromagnetic wave of creeping inhaled in ripple layer to external radiation；It is special that the material of described suction ripple layer 20 has impedance
Property, so that electromagnetic wave of creeping as often as possible enters suction ripple layer.Further, the described material inhaling ripple layer 20 also has loss spy
Property, to guarantee that the electromagnetic wave of creeping entering suction ripple layer can be completely absorbed.
Described suction ripple layer selects magnetic loss type absorbing material.The described material inhaling ripple layer comprises substrate binding agent and soft
In magnetic metallic powder, preferably embodiment, this soft magnetic metal powder is sheet shape；This soft magnetic metal powder selects carbonyl iron
Any one in powder, nikel powder, cobalt powder.Described substrate binding agent selects epoxy resin.For ensureing to inhale the electromagnetic matching of ripple layer
Property, soft magnetic metal powder volume percent range in whole suction ripple layer is 25%～35% to be advisable.
Described conductive reflective comprises substrate binding agent and conductive particle.Described conductive particle is metal material
Grain, select in copper or silver any one.For ensureing the reflection of electromagnetic wave performance of conductive reflective, conductive particle is in whole conduction
Volume percent range in reflecting layer is 35%～45%, and the thickness range of conductive reflective is 30 μm～50 μm.
The suction ripple layer of the present invention and conductive reflective can be prepared by spraying, specifically comprise following five steps:
Step 1, pretreatment of particles.Utilize coupling agent, if Silane coupling agent KH550 is to electromagnetic particle (soft magnetic metal powder
End, conductive particle) carry out pretreatment, improve the compatibility between granule and resin with this, the mechanical property of reinforcing material.
Step 2, calculates and weighs.The volume fraction of thickness according to layers of material and wherein electromagnetic particle calculates required
The quality of electromagnetic particle and epoxy resin (substrate binding agent), it is contemplated that the consumption in spraying process, according to required quality
1.5 times weigh electromagnetic particle and epoxy resin；
Step 3, mix and blend.First carry out epoxy resin and diluent being mixed and stirred for epoxy resin being completely dissolved,
Add a certain amount of dispersant white carbon and defoamer, by high speed dispersor, mixture is stirred, treat that it divides completely
During continuously stirred, electromagnetic particle, then continuous stirring certain time it is gradually added, so that electromagnetic particle is completely dispersed after Saning；
Step 4, spraying.Spray gun is attached with air compressor machine, scattered batch mixing is poured into the leakage cup of spray gun, spray coated
In journey, nozzle is vertically downward, nozzle and the distance about 25cm of sprayed surface, repeatedly sprays, needs in each spraying process
Spray after sprayed coating surface is dry next time.
Step 5, coating post processing: after having sprayed, place it in curing molding in drying baker, after molding, weigh spraying
The electromagnetic particle calculated in the quality of material, with step 2 contrasts with epoxy resin gross mass, then utilizes sand paper to enter time overweight
Row surface grinding process.
Utilizing ball cone model, the surface-creeping w ave absorber coatings coating effect proposing the present invention carries out simulation calculation and divides
Analysis.Simulation calculation frequency is 10GHz, and Simulation Calculation is as in figure 2 it is shown, including three class models: (a) is without step ball cone
Model, its cone height 400mm, facies basialis pyramidis radius and bottom hemisphere radius are all 20mm；B () has step ball cone mould
Type, its cone height 400mm, facies basialis pyramidis radius is 20mm, bottom hemisphere radius is 21mm；The table of (c) coating present invention
Face Creeping Wave absorber coatings have step ball cone model, its cone height 400mm, facies basialis pyramidis radius is 20mm, bottom half
Radius of sphericity is 21mm, in conical surface coating one circle surface-creeping w ave absorber coatings of the present invention, coating from bottom stage
Thickness and width can change.
In order to highlight step, the scattering of surface-creeping w ave is affected, compare TE ripple (electric field component of electromagnetic wave and electromagnetism
The plane that direction of wave travel is constituted with paster normal direction is vertical, and magnetic-field component is in this plane) and the TM ripple (electric field of electromagnetic wave
Component is in the plane that electromagnetic wave propagation direction and paster normal direction are constituted, and magnetic-field component is vertical with this plane) irradiation time, nothing
Step ball cone model and have step ball cone model Monostatic RCS (RCS).Simulation result as it is shown on figure 3,
Angle between abscissa angle correspondence electromagnetic wave propagation direction and ball cone axis in figure.It can be seen that TM ripple shines
Without step ball cone model with there is difference between step ball cone model mono-static RCS to become apparent from when penetrating, i.e. surface is climbed by step
The scattering impact of row ripple can more significantly show, and has step ball cone model to compare nothing in the range of whole-10 °～10 °
Step ball cone model mono-static RCS exceeds 3.95dB～10.75dB.Therefore, TM ripple is all used to irradiate in following simulation calculation.
It follows that the effect that the surface-creeping w ave absorber coatings that diplomatic copy invention proposes further brings.Here, inhale ripple layer
Being made up of epoxy resin and the sheet shape carbonyl iron particles that volume fraction is 30%, this suction ripple layer in the complex dielectric permittivity of 10GHz is
13.46-0.32j, complex permeability 1.63-1.57j.Width is effectively applied in order to obtain surface-creeping w ave absorber coatings quickly
Degree, first carries out this suction ripple layer absorbing property under different-thickness and calculates, can use following two formulas.
In formula, Z0Representing the characteristic impedance of air, its size is 377 Ω；ZinFor coating, the input of incident electromagnetic wave is hindered
Anti-；εrComplex dielectric permittivity for coating；μrComplex permeability for coating；F is for calculating frequency, at this equal to 10GHz；D is coating
Thickness；C is electromagnetic wave spread speed in free space, and its size is about 3.0 × 108m/s.Fig. 4 gives at 10GHz
This suction ripple layer reflectance with thickness profiles, as can be seen from the figure inhales the absorbent properties of ripple layer when thickness is 1.25mm
Good.According to electromagnetic wave transmission principle in the material, this thickness correspondence electromagnetic wave 1/4 wavelength in the material, accordingly by surface
Effective application width of Creeping Wave absorber coatings is set to 1.25 (4n+1) mm, and wherein n is positive integer.
It is 0.5mm that Fig. 5 gives applied thickness, and width is respectively 6.25mm, 11.25mm, 16.25mm and 21.25mm originally
After invention surface-creeping w ave absorber coatings, with the ball cone mono-static RCS simulation result of step, and with have step uncoated
The ball cone mono-static RCS simulation result of surface-creeping w ave absorber coatings is contrasted.It can be seen that the present invention proposes
Surface-creeping w ave absorber coatings can effectively absorb ball cone surface Creeping Wave, so that ball cone RCS is substantially reduced.Contracting
The width subtracting size and coating has close relationship, and along with the increase of coating widths, and RCS degree of taper has first to increase and subtracts afterwards
Little variation tendency.Therefore, when engineering uses, it should be noted that select optimal application width, and be not application width the biggest more
Good.In the range of whole-10 °～10 °, the surface-creeping w ave of the present invention that applied thickness is 0.5mm, width is 11.25mm absorbs
Coating, ball cone RCS brought on the whole reduction effect is more preferable, compared to there being step uncoated surface Creeping Wave absorber coatings
The mono-static RCS of ball cone reduces 6.05dB～13.99dB.
It is 11.25mm that Fig. 6 gives application width, and thickness is respectively 0.3mm, 0.5mm, 0.7mm and 0.9mm table of the present invention
After the Creeping Wave absorber coatings of face, with the ball cone mono-static RCS simulation result of step, and climb with there being step uncoated surface
The ball cone mono-static RCS simulation result of row ripple absorber coatings is contrasted.It can be seen that the surface that the present invention proposes
Cone RCS that Creeping Wave absorber coatings brings is reduced-size and coating thickness also has close relationship, and along with thick coating
The increase of degree, is gradually reduced 0 ° of angle accessory RCS degree of taper, even can exceed uncoated surface Creeping Wave absorber coatings
Ball cone mono-static RCS；And in other angle, ball cone RCS degree of taper increases along with the increase of coating layer thickness.In like manner, exist
When engineering uses, it should also be noted that select optimal applied thickness, the RCS in the whole angular range involved by balance reduces effect.
In order to highlight the advantage of the surface-creeping w ave absorber coatings that the present invention proposes, at this, (surface is without leading with conventional coating
Electric layer) contrasted, simulation result is as shown in Figure 7.The applied thickness of surface-creeping w ave absorber coatings of the present invention in figure
It is 11.25mm for 0.3mm, width, effect, conventional painting will be reduced close to the RCS that surface-creeping w ave absorber coatings of the present invention brings
Applied thickness 0.4mm of layer, width are 30mm, either the applied thickness of coating or surface covered, and conventional coating is all higher than
The surface-creeping w ave absorber coatings that the present invention proposes；And in the range of-2 °～2 °, the surface-creeping w ave that the coating present invention proposes
Absorber coatings coating more conventional than coating, ball cone RCS declines more than 8dB.
The present invention propose surface-creeping w ave absorber coatings, its performance it is critical only that suction ripple layer electromagnetic performance, it is by inhaling
The electromagnetic parameter of ripple layer, applied thickness and application width determine.Therefore, during engineer applied, it is required for being faced
Practical situation, carry out inhale the electromagnetic parameter of ripple layer, applied thickness and application width design, enable absorber coatings more added with
Effect ground sorbent surface is creeped electromagnetic wave.
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read foregoing, for the present invention's
Multiple amendment and replacement all will be apparent from.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (9)
1. a surface-creeping w ave absorber coatings structure, it is coated in target (10) surface, it is characterised in that this coating structure bag
Containing bond from the inside to the outside from target (10) surface suction ripple layer (20) arranged and conductive reflective (30), this suction ripple layer (20) can be by
Electro-magnetic wave absorption that target surface is creeped also changes into heat energy, and this conductive reflective (30) has reflection, can suppress to enter
To the electromagnetic wave of creeping inhaled in ripple layer to external radiation；The material of described suction ripple layer (20) has impedance operator, so that electromagnetism of creeping
Ripple as often as possible enters suction ripple layer.
2. surface-creeping w ave absorber coatings structure as claimed in claim 1, it is characterised in that the material of described suction ripple layer (20)
Material also has loss characteristic, to guarantee that the electromagnetic wave of creeping entering suction ripple layer can be completely absorbed.
3. surface-creeping w ave absorber coatings structure as claimed in claim 1, it is characterised in that the thickness of this coating structure is
0.3mm~0.9mm；The width of coating is 6.25mm ~ 21.25mm.
4. surface-creeping w ave absorber coatings structure as claimed in claim 1, it is characterised in that described suction ripple layer (20) is selected
Magnetic loss type absorbing material.
5. surface-creeping w ave absorber coatings structure as claimed in claim 4, it is characterised in that the material of described suction ripple layer (20)
Material comprises substrate binding agent and soft magnetic metal powder, this soft magnetic metal powder volume basis in whole suction ripple layer (20)
It is 25% ~ 35% than scope.
6. surface-creeping w ave absorber coatings structure as claimed in claim 5, it is characterised in that described soft magnetic metal powder
Select in carbonyl iron dust, nikel powder, cobalt powder any one；Described substrate binding agent selects epoxy resin.
7. surface-creeping w ave absorber coatings structure as claimed in claim 5, it is characterised in that described soft magnetic metal powder
In sheet shape.
8. surface-creeping w ave absorber coatings structure as claimed in claim 1, it is characterised in that described conductive reflective (30)
Comprising substrate binding agent and conductive particle, this conductive particle volume percent range in whole conductive reflective is 35% ~
45%, the thickness range of conductive reflective (30) is 30 μm ~ 50 μm.
9. surface-creeping w ave absorber coatings structure as claimed in claim 8, it is characterised in that described conductive particle is metal
Material granule, selects copper or silver.
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| CN106599421A (en) * | 2016-12-02 | 2017-04-26 | 上海无线电设备研究所 | Imaging-based analysis method for absorbing material coated target creeping wave |
| CN106817888A (en) * | 2017-03-24 | 2017-06-09 | 上海巽晔计算机科技有限公司 | A kind of central control machine case for smart home |
| CN107301301A (en) * | 2017-07-06 | 2017-10-27 | 上海无线电设备研究所 | A kind of building method of magnetic loss type contracting than absorbing material |
| CN107946763A (en) * | 2017-12-26 | 2018-04-20 | 航天科工武汉磁电有限责任公司 | One kind inhales ripple wave transparent integration metamaterial antenna cover and its application |
| CN109640568A (en) * | 2018-11-30 | 2019-04-16 | 苏州铂韬新材料科技有限公司 | A kind of Novel sealing ring and preparation method thereof for inhaling wave energy with noise reduction |
| CN115787291A (en) * | 2022-12-28 | 2023-03-14 | 艾利特控股集团有限公司 | Electromagnetic wave absorption finishing liquid and application thereof in preparation of electromagnetic radiation protection textile fabric |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106599421A (en) * | 2016-12-02 | 2017-04-26 | 上海无线电设备研究所 | Imaging-based analysis method for absorbing material coated target creeping wave |
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| CN106817888A (en) * | 2017-03-24 | 2017-06-09 | 上海巽晔计算机科技有限公司 | A kind of central control machine case for smart home |
| CN107301301A (en) * | 2017-07-06 | 2017-10-27 | 上海无线电设备研究所 | A kind of building method of magnetic loss type contracting than absorbing material |
| CN107301301B (en) * | 2017-07-06 | 2020-12-22 | 上海无线电设备研究所 | Construction method of magnetic loss type shrinkage ratio wave-absorbing material |
| CN107946763A (en) * | 2017-12-26 | 2018-04-20 | 航天科工武汉磁电有限责任公司 | One kind inhales ripple wave transparent integration metamaterial antenna cover and its application |
| CN107946763B (en) * | 2017-12-26 | 2020-07-03 | 航天科工武汉磁电有限责任公司 | Wave-absorbing and wave-transmitting integrated metamaterial antenna housing and application thereof |
| CN109640568A (en) * | 2018-11-30 | 2019-04-16 | 苏州铂韬新材料科技有限公司 | A kind of Novel sealing ring and preparation method thereof for inhaling wave energy with noise reduction |
| CN115787291A (en) * | 2022-12-28 | 2023-03-14 | 艾利特控股集团有限公司 | Electromagnetic wave absorption finishing liquid and application thereof in preparation of electromagnetic radiation protection textile fabric |
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