CN110429389A - A kind of absorbent structure - Google Patents
A kind of absorbent structure Download PDFInfo
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- CN110429389A CN110429389A CN201910731095.7A CN201910731095A CN110429389A CN 110429389 A CN110429389 A CN 110429389A CN 201910731095 A CN201910731095 A CN 201910731095A CN 110429389 A CN110429389 A CN 110429389A
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- 230000002745 absorbent Effects 0.000 title claims abstract description 48
- 239000002250 absorbent Substances 0.000 title claims abstract description 48
- 239000002184 metal Substances 0.000 claims abstract description 63
- 229910052751 metal Inorganic materials 0.000 claims abstract description 63
- 239000002131 composite material Substances 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 106
- 230000000694 effects Effects 0.000 abstract description 14
- 238000010276 construction Methods 0.000 abstract description 9
- 239000011358 absorbing material Substances 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 abstract description 6
- 230000010287 polarization Effects 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 3
- 239000002356 single layer Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 239000004619 high density foam Substances 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009711 regulatory function Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Laminated Bodies (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The present invention provides a kind of absorbent structures, using the composite construction of resistive layer and metal resonant layer, no matter which type of polarization mode Ru She electromagnetic wave is presented, application voltage drive is all equivalent to the effect of entire absorbent structure, since different structure metal and the impedance operator of resistive layer are different with resonance characteristic, therefore can layer surface motivate the resonance current of different frequency range, there is good resonance response to the electromagnetic wave of different frequency ranges, due to the presence of the resonance current of surface excitation, when forming adaptive polarization condition, dispersion current can be generated in lossy medium, the loss of electromagnetic energy is gradually decayed in absorbing material and generated to dispersion current, the resistive layer and metal resonant layer composite construction of this single layer can make the electromagnetic wave energy in outfield be converted to thermal energy, increase the absorbing property of absorbent structure, it realizes to more wide-band electromagnetism The composite absorption performance of wave obtains preferably whole wave-absorbing effect by the medium matched design that dielectric constant height is different, thickness is different.
Description
Technical field
The present invention relates to electromagnetic wave technology fields, more specifically more particularly to a kind of absorbent structure.
Background technique
Broad-band radar absorbers are a kind of novel and multifunctional composite structures, with strong points, absorbing property is good, quality
The features such as light and mechanical property meets bearing requirements, it has also become the important developing direction in the present age stealthy field.
Breadboardin absorbent structure is a kind of mode of resonance broad-band radar absorbers being widely used, and has high temperature resistant, quality
Gently, wet-heat resisting and it is anticorrosive the features such as, which is made of frequency-selective surfaces, dielectric layer and metal base plate, wherein FSS is
Chip unit periodic arrangement of various shapes forms, and incudes to incident electromagnetic wave and generates equivalent capacity, inductance and resistance, passes through tune
The parameters such as geometry, size and the sheet resistance of whole FSS, thus it is possible to vary equivalent capacity, inductance and the resistance of structural body, and then adjust
The resonance absorbing of structure entirety effectively meets the absorbing property requirement of different application.
But current breadboardin absorbent structure is in the presence of suction wavestrip width, suction wave frequency section is single and relative thickness is thicker
The problems such as.
Summary of the invention
In view of this, technical solution is as follows to solve the above problems, the present invention provides a kind of absorbent structure:
A kind of absorbent structure, the absorbent structure include:
Substrate；
Set gradually the first matched media layer and the second matched media layer on the substrate；
Metallic resistance composite layer on the second matched media layer is set；
Wherein, the metallic resistance composite layer includes: resistive layer and metal resonant layer, wherein the metal resonant layer is set
It is equipped with through the metal resonant layer, and the groove to match with the resistive layer size；The groove is for being arranged the electricity
Resistance layer.
Preferably, in above-mentioned absorbent structure, the metallic resistance composite layer is divided into multiple metallic resistance recombiner units；
Wherein, multiple metallic resistance recombiner units periodic arrangement on the second matched media layer.
Preferably, in above-mentioned absorbent structure, the metallic resistance recombiner unit is rectangular metal resistance recombiner unit；
Wherein, the central area of the rectangular metal resistance recombiner unit is provided with cross metallic resistance composite layer,
Described in the shape of resistive layer and the metal resonant layer be cross；
Four corners of the rectangular metal resistance recombiner unit are provided with square metal resistance composite layer, wherein the electricity
Resistance layer and the shape of the metal resonant layer are rectangular.
Preferably, in above-mentioned absorbent structure, the long side of the criss-cross metal resonant layer is 8.6mm, criss-cross
The broadside of the metal resonant layer is 3.6mm；
The long side of the criss-cross resistive layer is 6mm, and the broadside of the criss-cross resistive layer is 1mm.
Preferably, in above-mentioned absorbent structure, the side length of the rectangular metal resonant layer is 3.5mm；
The side length of the rectangular resistive layer is 1mm.
Preferably, in above-mentioned absorbent structure, the substrate is metallic substrates；The substrate with a thickness of 15 μm.
Preferably, in above-mentioned absorbent structure, the material of the first matched media layer is high-density foam material.
Preferably, in above-mentioned absorbent structure, the first matched media layer with a thickness of 2mm.
Preferably, in above-mentioned absorbent structure, the material of the second matched media layer is FR-4 material.
Preferably, in above-mentioned absorbent structure, the second matched media layer with a thickness of 1mm.
Compared to the prior art, what the present invention realized has the beneficial effect that
The absorbent structure realizes width under the premise of light-weighted using the composite construction of resistive layer and metal resonant layer
Frequently, multifrequency inhales the function of wave, by adjusting the size of metal resonant layer, may be implemented to lead to the strong regulatory function for inhaling wave frequency section
It crosses increase and decrease and adjusts the suction wave efficiency of resistive layer also adjustable absorbing material.
Also, using the composite construction of resistive layer and metal resonant layer, no matter which type of pole Ru She electromagnetic wave is presented
Change mode is all equivalent to application voltage drive to the effect of entire absorbent structure, due to the resistance of different structure metal and resistive layer
Anti- characteristic is different from resonance characteristic, thus can layer surface motivate the resonance current of different frequency range, i.e., to different frequency ranges
Electromagnetic wave has good resonance response, due to the presence of the resonance current of surface excitation, when forming adaptive polarization condition,
Dispersion current can be generated in lossy medium, the loss of electromagnetic energy is gradually decayed in absorbing material and generated to dispersion current, because
This, the resistive layer and metal resonant layer composite construction of this single layer can make the electromagnetic wave energy in outfield be converted to thermal energy, increase and inhale
The absorbing property of wave structure to realize the composite absorption performance to more wide-band electromagnetic wave, while passing through dielectric constant height
Medium matched designs different, that thickness is different can obtain preferably whole wave-absorbing effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of absorbent structure provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another absorbent structure provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another absorbent structure provided in an embodiment of the present invention；
Fig. 4 is that a kind of reflection coefficient of metallic resistance composite layer multifrequency wide range absorbent structure provided in an embodiment of the present invention is bent
Line chart.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
With reference to Fig. 1, Fig. 1 is a kind of structural schematic diagram of absorbent structure provided in an embodiment of the present invention.
The absorbent structure includes:
Substrate 11；
The the first matched media layer 12 and the second matched media layer 13 being successively set in the substrate 11；
Metallic resistance composite layer on the second matched media layer 13 is set；
Wherein, the metallic resistance composite layer includes: resistive layer 15 and metal resonant layer 14, wherein the metal resonance
The groove that layer 14 is provided with through the metal resonant layer 14, and matches with 15 size of resistive layer；The groove is used for
The resistive layer 15 is set.
In this embodiment, the size of the resistive layer is adjustable, and resistive layer primarily serves offer loss surface current,
To enhance the effect of wave-absorbing effect；For metal resonant layer mainly by the resonance characteristic of metal, the resonance for providing corresponding wave band is strong
Echo area, to improve the suction wave efficiency of corresponding wave band, and back wave by different metal face multiple reflections to resistive layer, can
To further increase surface current loss, the most strong of the adjustable absorbent structure of size by adjusting metal resonant layer inhales wave crest
Value, therefore, metal resonant layer size can accordingly be adjusted according to required strong absworption peak value position, while pass through dielectric
The different medium matched design of constant height, thickness can obtain preferably whole wave-absorbing effect.
Its working principle is illustrated below.
The absorbent structure realizes width under the premise of light-weighted using the composite construction of resistive layer and metal resonant layer
Frequently, multifrequency inhales the function of wave, by adjusting the size of metal resonant layer, may be implemented to lead to the strong regulatory function for inhaling wave frequency section
It crosses increase and decrease and adjusts the suction wave efficiency of resistive layer also adjustable absorbing material.
Also, using the composite construction of resistive layer and metal resonant layer, no matter which type of pole Ru She electromagnetic wave is presented
Change mode is all equivalent to application voltage drive to the effect of entire absorbent structure, due to the resistance of different structure metal and resistive layer
Anti- characteristic is different from resonance characteristic, thus can layer surface motivate the resonance current of different frequency range, i.e., to different frequency ranges
Electromagnetic wave has good resonance response, due to the presence of the resonance current of surface excitation, when forming adaptive polarization condition,
Dispersion current can be generated in lossy medium, the loss of electromagnetic energy is gradually decayed in absorbing material and generated to dispersion current, because
This, the resistive layer and metal resonant layer composite construction of this single layer can make the electromagnetic wave energy in outfield be converted to thermal energy, increase and inhale
The absorbing property of wave structure to realize the composite absorption performance to more wide-band electromagnetic wave, while passing through dielectric constant height
Medium matched designs different, that thickness is different can obtain preferably whole wave-absorbing effect.
With reference to Fig. 2, Fig. 2 is the structural schematic diagram of another absorbent structure provided in an embodiment of the present invention；With reference to Fig. 3, Fig. 3
For the structural schematic diagram of another absorbent structure provided in an embodiment of the present invention.
The metallic resistance composite layer is divided into multiple metallic resistance recombiner units；
Wherein, multiple metallic resistance recombiner units periodic arrangement on the second matched media layer.
The metallic resistance recombiner unit includes, but are not limited to rectangular metal resistance recombiner unit；
Wherein, the central area of the rectangular metal resistance recombiner unit is provided with cross metallic resistance composite layer,
Described in the shape of resistive layer and the metal resonant layer be cross；
Four corners of the rectangular metal resistance recombiner unit are provided with square metal resistance composite layer, wherein the electricity
Resistance layer and the shape of the metal resonant layer are rectangular.
In this embodiment, depending on the shape of the resistive layer and the metal resonant layer can be according to actual conditions, at this
It is only illustrated in inventive embodiments with a kind of embodiment of optimal effectiveness.
As shown in Fig. 2, the long side of the criss-cross metal resonant layer 14 is 8.6mm, the criss-cross metal resonance
The broadside of layer 14 is 3.6mm；
The long side of the criss-cross resistive layer 15 is 6mm, and the broadside of the criss-cross resistive layer 15 is 1mm.
As shown in Fig. 2, the side length of the rectangular metal resonant layer 14 is 3.5mm；
The side length of the rectangular resistive layer 15 is 1mm.
In this embodiment, the size of the resistive layer is adjustable, and resistive layer primarily serves offer loss surface current,
To enhance the effect of wave-absorbing effect；For metal resonant layer mainly by the resonance characteristic of metal, the resonance for providing corresponding wave band is strong
Echo area, to improve the suction wave efficiency of corresponding wave band, and back wave by different metal face multiple reflections to resistive layer, can
To further increase surface current loss, the most strong of the adjustable absorbent structure of size by adjusting metal resonant layer inhales wave crest
Value, therefore, metal resonant layer size can accordingly be adjusted according to required strong absworption peak value position, while pass through dielectric
The different medium matched design of constant height, thickness can obtain preferably whole wave-absorbing effect.
It should be noted that depending on the size of the resistive layer and the metal resonant layer can be according to actual conditions, at this
It is only illustrated in inventive embodiments with a kind of embodiment of optimal effectiveness.
Further, the substrate is metallic substrates；The substrate with a thickness of 15 μm.
In this embodiment, the material of the substrate 11 includes but is not limited to copper foil.
Further, the material of the first matched media layer 12 includes, but are not limited to high-density foam material.
Further, the first matched media layer 12 with a thickness of 2mm.
Further, the material of the second matched media layer 13 includes, but are not limited to FR-4 material.
Further, the second matched media layer 13 with a thickness of 1mm.
Material can be further decreased by the combination of different-thickness matched media layer based on the above embodiment of the present invention
Reflection coefficient, to further increase the absorbing property of material.
With reference to Fig. 4, Fig. 4 is a kind of the anti-of metallic resistance composite layer multifrequency wide range absorbent structure provided in an embodiment of the present invention
Penetrate charts for finned heat.
Its metallic resistance composite layer multifrequency wide range absorbent structure have ultra-wide inhale wavestrip it is wide, 7.8GHz-20GHz range can
The following reflection coefficient of realization -10dB reaches 90% or more suction wave efficiency, while peak reflection coefficient reaches -37dB, approaches
100% wave-absorbing effect can realize that peak value is adjustable by changing the quantity of unit size and composite construction in broader frequency range
Whole wave-absorbing effect.
Also, the metallic resistance lamination layer structure is simple, production easy to process, and, substrate uses high-density foam
Material is main base material, has ultralight weight, with the superperformance of ultra lightweighting in similar absorbing material.
A kind of absorbent structure provided by the present invention is described in detail above, specific case pair used herein
The principle of the present invention and embodiment are expounded, method of the invention that the above embodiments are only used to help understand
And its core concept；At the same time, for those skilled in the art, according to the thought of the present invention, in specific embodiment and
There will be changes in application range, in conclusion the contents of this specification are not to be construed as limiting the invention.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For the device disclosed in the embodiment, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, phase
Place is closed referring to method part illustration.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the element that the process, method, article or equipment including a series of elements is intrinsic,
It further include either the element intrinsic for these process, method, article or equipments.In the absence of more restrictions,
The element limited by sentence "including a ...", it is not excluded that in the process, method, article or equipment including the element
In there is also other identical elements.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of absorbent structure, which is characterized in that the absorbent structure includes:
Substrate；
Set gradually the first matched media layer and the second matched media layer on the substrate；
Metallic resistance composite layer on the second matched media layer is set；
Wherein, the metallic resistance composite layer includes: resistive layer and metal resonant layer, wherein the metal resonant layer is provided with
Through the metal resonant layer, and the groove to match with the resistive layer size；The groove is for being arranged the resistive layer.
2. absorbent structure according to claim 1, which is characterized in that the metallic resistance composite layer is divided into multiple metals
Resistance recombiner unit；
Wherein, multiple metallic resistance recombiner units periodic arrangement on the second matched media layer.
3. absorbent structure according to claim 2, which is characterized in that the metallic resistance recombiner unit is rectangular metal electricity
Hinder recombiner unit；
Wherein, the central area of the rectangular metal resistance recombiner unit is provided with cross metallic resistance composite layer, wherein institute
The shape for stating resistive layer and the metal resonant layer is cross；
Four corners of the rectangular metal resistance recombiner unit are provided with square metal resistance composite layer, wherein the resistive layer
Shape with the metal resonant layer is rectangular.
4. absorbent structure according to claim 3, which is characterized in that the long side of the criss-cross metal resonant layer is
8.6mm, the broadside of the criss-cross metal resonant layer are 3.6mm；
The long side of the criss-cross resistive layer is 6mm, and the broadside of the criss-cross resistive layer is 1mm.
5. absorbent structure according to claim 3, which is characterized in that the side length of the rectangular metal resonant layer is
3.5mm；
The side length of the rectangular resistive layer is 1mm.
6. absorbent structure according to claim 1, which is characterized in that the substrate is metallic substrates；The thickness of the substrate
Degree is 15 μm.
7. absorbent structure according to claim 1, which is characterized in that the material of the first matched media layer is high density
Foamed material.
8. absorbent structure according to claim 1, which is characterized in that the first matched media layer with a thickness of 2mm.
9. absorbent structure according to claim 1, which is characterized in that the material of the second matched media layer is FR-4 material
Material.
10. absorbent structure according to claim 1, which is characterized in that the second matched media layer with a thickness of 1mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910731095.7A CN110429389B (en) | 2019-08-08 | 2019-08-08 | Wave-absorbing structure |
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| CN110429389B CN110429389B (en) | 2021-01-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111769367A (en) * | 2020-07-14 | 2020-10-13 | 合肥工业大学 | Metamaterial wave absorber and communication equipment |
| CN113540819A (en) * | 2021-07-12 | 2021-10-22 | 上海大学 | Wave absorbing structure based on jea cold cross pattern |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111769367A (en) * | 2020-07-14 | 2020-10-13 | 合肥工业大学 | Metamaterial wave absorber and communication equipment |
| CN111769367B (en) * | 2020-07-14 | 2021-07-23 | 合肥工业大学 | Metamaterial wave absorber and communication equipment |
| CN113540819A (en) * | 2021-07-12 | 2021-10-22 | 上海大学 | Wave absorbing structure based on jea cold cross pattern |
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| CN110429389B (en) | 2021-01-05 |
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