CN110504553A - A kind of multilayer ultra-wide band wave-absorber that electrically lossy material is compound with magnetic material - Google Patents
A kind of multilayer ultra-wide band wave-absorber that electrically lossy material is compound with magnetic material Download PDFInfo
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- CN110504553A CN110504553A CN201910769579.0A CN201910769579A CN110504553A CN 110504553 A CN110504553 A CN 110504553A CN 201910769579 A CN201910769579 A CN 201910769579A CN 110504553 A CN110504553 A CN 110504553A
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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
- H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
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Abstract
The invention proposes a kind of multilayer ultra-wide band wave-absorbers compound based on electrically lossy material and magnetic material, belong to microwave electromagnetic stealth technology field.Absorbent structure provided by the invention includes six resistive layers and magnetic absorbed layer, metallic reflector, resistive film interval supporting layer.Six layers of resistive layer and magnetic material form laminated construction, and each layer resistive film spacing is T, magnetospheric with a thickness of H.Each layer resistive film is square by cellular construction, and size from top to down is respectively L1, L1, L3, and L4, L5, the array structure of L6, the unit period is P.The present invention is based on electrically lossy materials and the Rational structureization of magnetic material to design, realize the wave-absorbing effect of ultra wide band, and there is high-intensitive absorption in certain frequency ranges, since the symmetry of structure makes structure insensitive for polarization of electromagnetic wave, the gradually changeable design of multilayer resistance enhances broadband wide-angle assimilation effect.
Description
Technical field
The present invention relates to microwave electromagnetic stealth technology fields, and in particular to one kind is multiple based on electrically lossy material and magnetic material
The multilayer ultra-wide band wave-absorber of conjunction.
Background technique
With the development of modern science and technology, the continuous enhancing of various Detection Techniques, for the material in broadband and electromagnetic wave absorption
It is required that higher and higher.Microwave absorbing material can effectively absorb, decay incident electromagnetic wave and be widely used in military stealthy, electric
In terms of the electromagnetic protections such as magnetic screen.Traditional absorbing material is as such as iron-based material, carbon based material etc., although these absorbing material energy
It is enough that wide band absorption is realized under certain thickness, but its absorption intensity and absorption width are often difficult to meet the requirements.
The Meng Fan of Nanjing University is strolled with Wu Duanxin in the patent document " Asia based on loss-type frequency-selective surfaces of its application
Wavelength layer stratiform three-dimensional absorbent structure " (application number: CNl08493623A) proposes that a kind of wideband wave absorbing material uses ferrite layer
The absorption of low frequency and high frequency is each responsible for the selection of loss-type frequency, but the assimilation effect of low frequency and bad, part frequency point
About -10dB is reflected, high frequency is also only to the absorption of -10dB of 25GHz, and reflectivity curve fluctuation is violent.
Summary of the invention
In view of problems of the prior art, it is compound based on electrically lossy material and magnetic material that the present invention provides one kind
Multilayer ultra-wide band wave-absorber, the wave-absorber includes first resistor film layer, second resistance film layer, 3rd resistor film layer, the 4th
Resistive layer, the 5th resistive layer, the 6th resistive layer and one layer of magnetic absorbed layer, magnetism are placed below resistive layer,
Magnetic absorbed layer can be the complex that carbonyl iron, metal alloy powder or magnetic metal oxide and resin are constituted.
Preferably, the resistive layer material can be graphene, tin indium oxide, polymer conducting material, graphite, acetylene
Carbon black, one kind or complex of carbon nanotube.
Preferably, the sheet resistance of square conductive film is Rs, and 60 Ω/sq≤Rs≤200 Ω/sq.
Preferably, the relative dielectric constant of the resistive film interval supporting layer is ε, and 1≤ε≤1.5, resistive film interval
Supporting layer material can be PVC or PMI foam or cellular material.
Preferably, the resistive film spacing T, and 2mm≤T≤8mm.
Preferably, the magnetospheric thickness H, and 0.2mm≤H≤4mm.
Preferably, the size of the resistive layer is different, and size meets: 2≤L1≤7mm；5≤L2≤10mm；6
≤L2≤13mm；7≤L4≤13mm；8≤L5≤14mm；8≤L6≤14mm.
Another aspect of the present invention provides a kind of pattern structure being made of above-mentioned wave-absorber, the patterning knot
Structure is periodic cells, and pattern can be square piece, disk, Fang Huan, annulus, split ring or they one of or it is a variety of.
Preferably, the period of the unit is P, and 12mm≤P≤16mm.
Compared with prior art, the present invention is at least had the advantages that
(1) it since the present invention is effectively controlled magnetospheric thickness, is significantly reduced while ensureing low frequency performance
The surface density of material.
(2) since the present invention takes full advantage of the loss of resistive film, the wave-absorber absorption band constructed is wide and absorbs strong
Degree is high, and the reflection in 6GHz-22GHz frequency range is less than -20dB.
(3) since the present invention is using the mentality of designing for using multilayer resistive film, the thinner thickness of the wave-absorber constructed.
Detailed description of the invention
Fig. 1 is the schematic three dimensional views of periodic structure unit of the invention；
Fig. 2 is cellular construction size marking figure of the invention；
Fig. 3 is the front schematic view of the first resistor film layer of ultra wide band electromagnetic wave absorption body of the invention；
Fig. 4 is schematic three dimensional views of the invention；
Fig. 5 is the Normal incidence reflectance rate simulation result of ultra wide band electromagnetic wave absorption body corresponding to the solution of the present invention 1；
Fig. 6 is the Normal incidence reflectance rate simulation result of ultra wide band electromagnetic wave absorption body glass corresponding to the solution of the present invention 2.
The present invention is described in more detail below.But following examples is only simple example of the invention, not generation
Table or limitation the scope of the present invention, protection scope of the present invention are subject to claims.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, of the invention is typical but non-limiting
Embodiment is as follows:
Embodiment 1
As shown in Figure 1, the multilayer resistive film changed by the design size on magnetic absorbed layer and resistance value, so that wide
With the electromagnetic wave incident in range to material internal, be depleted absorption；Wherein resistive film plays electromagnetic wave absorption and adjusts impedance
The effect matched is lost, so that assimilation effect is further enhanced by the height of bottom magnetic substance.Optimize unit by rationally designing
Structure realizes the stronger electromagentic resonance in broadband range, obtains the wave-absorbing effect of ultra wide band.The absorption of low frequency is main to be obtained
Beneficial to the magnetic loss of magnetic material.
As shown in Fig. 2, ultra wide band absorbent structure is by first resistor film layer (1), second resistance film layer (2), 3rd resistor film
Layer (3), the 4th resistive film film layer (4), the 5th resistive film film layer (5), the 6th resistive film film layer (6) and magnetic absorbed layer (7), gold
Belong to reflecting layer (8), supporting layer (9) composition between resistive film.
The array structure of multiple wave-absorber unit compositions is as shown in Figure 4；Array structure is periodic cells, wherein wave-absorber
Unit can be square piece, disk, Fang Huan, annulus, split ring or they one of or it is a variety of；The period of the unit is P, and
12mm≤P≤16mm；The front schematic view of the first resistor film layer of wave-absorber unit is as shown in Figure 3.
Supporting layer (9) between resistive film is PVC or PMI rigid foam, and relative dielectric constant ε is 1.12, and foam is electric
It hinders film to separate, froth bed main function is the distance controlled between resistive film and effectively reduces weight simultaneously, foam and resistive film
Together by resin bonding.Magnetic material is that sendust powder is dispersed in resin material.The wherein thickness of magnetosphere (7) H
H=2mm, the spacer thickness T=4.4mm between resistive film are spent, the resistance Rs of resistive film is 60-200 Ω/sq.Unit period P=
14.0mm.The unit size L1=5.4mm of first layer resistive film (1), the unit size L2=7.2mm of second layer resistive film (2),
The unit size L3=9.0mm of third layer resistive film (3), the unit size L4=10.8mm of the 4th layer of resistive film (4), layer 5
The unit size L5=12.5mm of resistive film (5), the unit size L6=11.0mm of layer 6 resistive film (6).
Resistive film material can be graphene, tin indium oxide, polymer conducting material, graphite, acetylene carbon black, carbon nanotube
One kind or complex；By taking graphene film as an example, grapheme material includes base layer and grapheme material layer, and basis material can be with
It is polyimides, the coated graphite alkene slurry on basis material forms resistive film.
The size of resistive layer is different, should be met according to each layer size of optimization design: 2≤L1≤7mm；5≤L2≤
10mm；6≤L3≤13mm；7≤L4≤13mm；8≤L5≤14mm；8≤L6≤14mm.The size of gradual change helps to obtain wider
The impedance matching of frequency range, and then help to obtain wide band absorption effect.
Preferably, the resistance value of resistive layer is also different should meet according to each layer resistance value of optimization design: 60≤R1
≤130Ω/sq；120≤R2≤150Ω/sq；130≤R3≤180Ω/sq；140≤R4≤180Ω/sq；150≤R5≤200
Ω/sq；150≤R6≤200Ω/sq；Resistive layer identical compared to resistance value, above-mentioned resistive layer have following effect:
Better impedance matching effect, and then can get broader Absorber Bandwidth and deeper absorption intensity.
Magnetic absorbed layer can be carbonyl iron, metal alloy powder or magnetic metal oxide constituted with resin it is compound
Body.
Metallic reflector can reflect electromagnetic wave using copper, aluminium or alloy；Can also be arranged on a metal plate by
Absorbing material, absorbing material can be carbon system absorbing material or electromagnetic wave absorbing material, and concrete type can be according to specific electromagnetism
The type of wave is selected.
The relative dielectric constant of resistive film interval supporting layer is ε, and 1≤ε≤1.5, resistive film interval supporting layer material can
To be PVC or PMI foam or cellular material.
Reflectivity curve in Fig. 5 be under the conditions of vertical incidence, the wave-absorber in 0.5GHz-40GHz frequency range TE and
Reflectivity curve under TM polarized wave.As can be seen from the figure with the standard of -10dB, effective frequency range of the absorbent structure is
1.0GHz-28.9GHz, with the standard of -20dB, effective frequency range of the absorbent structure is 6.2GHz-22.3GHz and to TE's and TM
Reflectivity curve is consistent.
Embodiment 2:
For resistive film interval supporting layer (9) using cellular material similar in dielectric constant, relative dielectric constant ε 1 is 1.15；Bee
Nest material has higher bearing strength relative to foamed material.Bonding can also be passed through by glue film between honeycomb and resistive film
Agent bonds together, and described adhesive can be as epoxy resin, polyester resin, polyacrylics etc.；
Square resistance Rs=60-200 Ω/sq of each layer resistive film, resistive film spacing T=4mm；Unit period p=15mm；
The unit size L1=5.0mm of first layer resistive film (1), the unit size L2=6.8mm of second layer resistive film (2), third layer
The unit size L3=8.5mm of resistive film (3), the unit size L4=10.2mm of the 4th layer of resistive film (4), layer 5 resistive film
(5) unit size L5=12.0mm, the unit size L6=10.0mm of layer 6 resistive film (6).
Reflectivity curve in Fig. 6 be under the conditions of vertical incidence, the wave-absorber in 0.5GHz-40GHz frequency range TE and
Reflectivity curve under TM polarized wave.As can be seen from the figure with the standard of -10dB, effective frequency range of the absorbent structure is
1.1GHz-31.9GHz, with the standard of -20dB, effective frequency range of the absorbent structure is 7.3GHz-25.8GHz and to TE's and TM
Reflectivity curve is consistent.
The Applicant declares that the present invention is explained by the above embodiments detailed construction feature of the invention, but the present invention is simultaneously
It is not limited to above-mentioned detailed construction feature, that is, does not mean that the present invention must rely on above-mentioned detailed construction feature and could implement.Institute
Belong to those skilled in the art it will be clearly understood that any improvement in the present invention, to the equivalence replacement of component selected by the present invention
And increase, selection of concrete mode of accessory etc., all of which fall within the scope of protection and disclosure of the present invention.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of multilayer ultra-wide band wave-absorber compound based on electrically lossy material and magnetic material, the wave-absorber includes the first electricity
Hinder film layer, second resistance film layer, 3rd resistor film layer, the 4th resistive layer, the 5th resistive layer, the 6th resistive layer and one layer
Magnetic absorbed layer, the magnetic absorbed layer are placed in below resistive layer.
2. the multilayer ultra-wide band wave-absorber compound based on electrically lossy material and magnetic material according to claim 1, special
Sign is: the resistive layer material can be graphene, tin indium oxide, polymer conducting material, graphite, acetylene carbon black, carbon
One kind or complex of nanotube.
3. the multilayer ultra-wide band wave-absorber compound based on electrically lossy material and magnetic material according to claim 1, special
Sign is: the sheet resistance of square conductive film is Rs, and 60 Ω/sq≤Rs≤200 Ω/sq.
4. the multilayer ultra-wide band wave-absorber compound based on electrically lossy material and magnetic material according to claim 1, special
Sign is, the relative dielectric constant of the resistive film interval supporting layer is ε, and 1≤ε≤1.5, resistive film interval supporting layer material
Matter can be PVC or PMI foam or cellular material.
5. the multilayer ultra-wide band wave-absorber compound based on electrically lossy material and magnetic material according to claim 1, special
Sign is, the resistive film spacing T, and 2mm≤T≤8mm.
6. the multilayer ultra-wide band wave-absorber compound based on electrically lossy material and magnetic material according to claim 1, special
Sign is, the magnetospheric thickness H, and 0.2mm≤H≤4mm.
7. the multilayer ultra-wide band wave-absorber compound based on electrically lossy material and magnetic material according to claim 1, special
Sign is that the size of the resistive layer is different, and size meets: 2≤L1≤7mm；5≤L2≤10mm；6≤L2≤
13mm；7≤L4≤13mm；8≤L5≤14mm；8≤L6≤14mm.
8. the multilayer ultra-wide band wave-absorber compound based on electrically lossy material and magnetic material according to claim 1, special
Sign is that the magnetic absorbed layer can be carbonyl iron, metal alloy powder or magnetic metal oxide and answer with what resin was constituted
It is fit.
9. the pattern structure being made of wave-absorber described in claim 1, which is characterized in that the pattern structure is the period
Property unit, pattern can be square piece, disk, Fang Huan, annulus, split ring or they one of or it is a variety of.
10. structure according to claim 9, which is characterized in that the period of the unit is P, and 12mm≤P≤16mm.
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| CN110927843A (en) * | 2019-12-23 | 2020-03-27 | 中国人民解放军国防科技大学 | Adjustable perfect wave absorber based on graphene photonic crystal structure |
| CN111029789A (en) * | 2019-12-24 | 2020-04-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Wave-absorbing material with positive honeycomb structure of 10 degrees |
| CN111525272A (en) * | 2020-04-06 | 2020-08-11 | 桂林电子科技大学 | Broadband terahertz wave absorber based on three-dart-shaped graphene |
| CN111516340A (en) * | 2020-07-03 | 2020-08-11 | 宁波曙翔新材料股份有限公司 | Invisible and anti-damage shielding material and preparation method thereof |
| CN112134024A (en) * | 2020-09-25 | 2020-12-25 | 合肥工业大学 | Three-dimensional structure broadband metamaterial wave absorber based on full graphite |
| CN112688084A (en) * | 2020-12-17 | 2021-04-20 | 宁波大学 | Electromagnetic absorption structure with optical transparency and adjustable wave-absorbing frequency |
| CN113054442A (en) * | 2021-03-11 | 2021-06-29 | 西北工业大学 | Preparation method and superstructure design method of multi-scale three-dimensional graphene-carbon nanotube-nickel-based flexible electromagnetic wave-absorbing composite material |
| CN113054443A (en) * | 2021-03-23 | 2021-06-29 | 广东顺德西安交通大学研究院 | Low-frequency wave absorber |
| CN113109635A (en) * | 2021-05-22 | 2021-07-13 | 深圳市通用测试系统有限公司 | Reflecting surface and compact range measuring system with same |
| CN113193379A (en) * | 2021-04-14 | 2021-07-30 | 哈尔滨工业大学 | Design method of S/C dual-band multi-layer tunable frequency selection surface |
| CN114142246A (en) * | 2021-11-24 | 2022-03-04 | 中国人民解放军空军工程大学 | Broadband wide-angle metamaterial wave absorber based on gradual impedance and preparation method |
| CN115260988A (en) * | 2022-08-15 | 2022-11-01 | 南京航空航天大学 | Composite wave-absorbing material and preparation method thereof |
| CN115674819A (en) * | 2023-01-03 | 2023-02-03 | 湖南博翔新材料有限公司 | Broadband wave-absorbing material and preparation method thereof |
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| CN110927843A (en) * | 2019-12-23 | 2020-03-27 | 中国人民解放军国防科技大学 | Adjustable perfect wave absorber based on graphene photonic crystal structure |
| CN111029789A (en) * | 2019-12-24 | 2020-04-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Wave-absorbing material with positive honeycomb structure of 10 degrees |
| CN111029789B (en) * | 2019-12-24 | 2021-10-22 | 中国航空工业集团公司沈阳飞机设计研究所 | Wave-absorbing material with positive honeycomb structure of 10 degrees |
| CN111525272A (en) * | 2020-04-06 | 2020-08-11 | 桂林电子科技大学 | Broadband terahertz wave absorber based on three-dart-shaped graphene |
| CN111525272B (en) * | 2020-04-06 | 2021-07-30 | 桂林电子科技大学 | Broadband terahertz wave absorber based on three-dart-shaped graphene |
| CN111516340A (en) * | 2020-07-03 | 2020-08-11 | 宁波曙翔新材料股份有限公司 | Invisible and anti-damage shielding material and preparation method thereof |
| CN112134024A (en) * | 2020-09-25 | 2020-12-25 | 合肥工业大学 | Three-dimensional structure broadband metamaterial wave absorber based on full graphite |
| CN112688084A (en) * | 2020-12-17 | 2021-04-20 | 宁波大学 | Electromagnetic absorption structure with optical transparency and adjustable wave-absorbing frequency |
| CN112688084B (en) * | 2020-12-17 | 2023-02-14 | 宁波大学 | Electromagnetic absorption structure with optical transparency and adjustable wave-absorbing frequency |
| CN113054442A (en) * | 2021-03-11 | 2021-06-29 | 西北工业大学 | Preparation method and superstructure design method of multi-scale three-dimensional graphene-carbon nanotube-nickel-based flexible electromagnetic wave-absorbing composite material |
| CN113054443A (en) * | 2021-03-23 | 2021-06-29 | 广东顺德西安交通大学研究院 | Low-frequency wave absorber |
| CN113054443B (en) * | 2021-03-23 | 2024-02-06 | 广东顺德西安交通大学研究院 | Low-frequency wave absorber |
| CN113193379A (en) * | 2021-04-14 | 2021-07-30 | 哈尔滨工业大学 | Design method of S/C dual-band multi-layer tunable frequency selection surface |
| CN113109635A (en) * | 2021-05-22 | 2021-07-13 | 深圳市通用测试系统有限公司 | Reflecting surface and compact range measuring system with same |
| CN114142246A (en) * | 2021-11-24 | 2022-03-04 | 中国人民解放军空军工程大学 | Broadband wide-angle metamaterial wave absorber based on gradual impedance and preparation method |
| CN115260988A (en) * | 2022-08-15 | 2022-11-01 | 南京航空航天大学 | Composite wave-absorbing material and preparation method thereof |
| CN115674819A (en) * | 2023-01-03 | 2023-02-03 | 湖南博翔新材料有限公司 | Broadband wave-absorbing material and preparation method thereof |
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