CN102769210A - Wideband wave-absorbing material - Google Patents
Wideband wave-absorbing material Download PDFInfo
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- CN102769210A CN102769210A CN201210222245XA CN201210222245A CN102769210A CN 102769210 A CN102769210 A CN 102769210A CN 201210222245X A CN201210222245X A CN 201210222245XA CN 201210222245 A CN201210222245 A CN 201210222245A CN 102769210 A CN102769210 A CN 102769210A
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Abstract
The invention discloses a wideband wave-absorbing material. The wideband wave-absorbing material comprises a copperplate bottom layer, a first metamaterial sheet layer and a second metamaterial sheet layer; the first metamaterial sheet layer comprises a first base material and a plurality of first artificial micro-structures arranged on the first base material; the second metamaterial sheet layer comprises a second base material and a plurality of second artificial micro-structures arranged on the second base material; and each first artificial micro-structure comprises a plurality of concentric metal rings and each second artificial micro-structure is a metal ring. According to the invention, the metamaterial principle is utilized to design the wave-absorbing material, and a plurality of layers of sub-units and micro-structure topological structures on the plurality of layers of sub-units are arranged to take the impedance matching and wideband wave-absorbing effects. The wideband wave-absorbing metamaterial has a very good wave-absorbing effect at 4-18 GHz.
Description
Technical field
The present invention relates to a kind of absorbing material, relate in particular to a kind of wideband and inhale the ultra material of ripple.
Background technology
Along with making rapid progress of scientific technological advance, be that the technology of media, various product are more and more with the electromagnetic wave, electromagenetic wave radiation also increases the influence of environment day by day.Such as, radio wave possibly cause interference to airport environment, causes airplane flight normally to take off; Mobile phone may disturb the work of various precise electronic medicine equipments; Even common computer also can radiation carry the electromagnetic wave of information, it possibly be received beyond several kilometers and reappear, and causes the leakage of aspect information such as national defence, politics, economy, science and technology.Therefore, administer electromagnetic pollution, seek a kind of material---the absorbing material that can keep out and weaken electromagenetic wave radiation, become a big problem of material science.
Absorbing material is one type of material that can absorb the electromagnetic wave energy that projects its surface, and it is comprising that military affairs and others also are widely used, such as stealthy machine, contact clothing etc.The electromagnetic primary condition of absorbed is: when (1) electromagnetic wave incided on the material, it can get into material internal to greatest extent, promptly required material to have matching properties; (2) the electromagnetism wave energy of entering material internal promptly almost all attenuates, i.e. attenuation characteristic.
Existing absorbing material utilizes each material self to the absorption of electromagnetic wave performance; Component through the design different materials makes mixed material possess microwave absorbing property; This type of material complex design and do not have large-scale promotion property; The mechanical performance of this type of material is subject to the mechanical performance of material itself simultaneously, can not satisfy the demand of special occasions.
Summary of the invention
Technical problem to be solved by this invention is, to the above-mentioned deficiency of prior art, proposes a kind of wideband of ultra materials theory design that utilizes and inhales the ultra material of ripple.The ultra absorbed frequency range of this wideband suction ripple is wide, absorbing property good, is with a wide range of applications.
The present invention solves the technical scheme that its technical problem adopts, and proposes a kind of wideband and inhales the ultra material of ripple, and it comprises along what the electromagnetic wave propagation direction set gradually and the second surpasses sheet of material, the first surpasses sheet of material and metal back layer; The said sheet of material that the first surpasses comprises first base material and is arranged in a plurality of first artificial micro-structural on first base material that the said sheet of material that the second surpasses comprises second base material and is arranged in a plurality of second artificial micro-structural on second base material; The said first artificial micro-structural comprises the metal ring of a plurality of concentric settings, and the said second artificial micro-structural is a metal ring.
Further, the said first artificial micro-structural comprises 6 metal rings that are provided with one heart, and said 6 metal rings are respectively first to the 6th metal ring from small to large by radius; The live width of first to the 6th metal ring equates that thickness equates that the spacing of adjacent metal annulus equates.
Further, to belong to annulus identical for the topology of the said second artificial micro-structural and the five metals of the said first artificial micro-structural.
Further, the material of the said first artificial micro-structural and the second artificial micro-structural is a copper, and the thickness of said copper coin bottom equals the said first artificial micro-structural or the second artificial micro-structural thickness.
Further, said first base material is FR-4 material, ceramic material, ferroelectric material or ferrite material.
Further, said second base material is FR-4 material, ceramic material, ferroelectric material or ferrite material.
Further, the said first artificial micro-structural through etching, bore to carve, electronics is carved or ion is carved and is attached on first substrate surface.
Further, the said second artificial micro-structural through etching, bore to carve, electronics is carved or ion is carved and is attached on second substrate surface.
Further, also be coated with cover layer on the said second artificial micro-structural, said first base material, second base material and tectal material are identical.
Further, also be provided with impedance matching layer on the said cover layer, the resistance value of said impedance matching layer is less than said cover layer resistance value.
The present invention utilizes ultra material principle design to inhale the ultra material of ripple, inhales the effect of ripple through the micro-structural topological structure that is provided with on multilayer subelement and each the straton unit to reach impedance matching and wideband.Wideband of the present invention is inhaled the ultra material of ripple and is all had wave-absorbing effect preferably 4 to 18GHZ.
Description of drawings
Fig. 1 is the perspective view of the elementary cell of the ultra material of formation;
Fig. 2 inhales the cutaway view of the ultra material of ripple for wideband of the present invention;
Fig. 3 inhales the perspective view that the first surpasses sheet of material in the ultra material of ripple for wideband of the present invention;
Fig. 4 inhales the perspective view that the second surpasses sheet of material in the ultra material of ripple for wideband of the present invention;
Fig. 5 inhales the suction ripple simulation result sketch map of the ultra material of ripple for wideband of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
Light, as electromagnetic a kind of, it is when passing glass; Because the wavelength of light is much larger than the size of atom; Therefore we can use the univers parameter of glass, and the details parameter of the atom of for example refractive index, rather than composition glass is described the response of glass to light.Accordingly, when research material was to other electromagnetic responses, any yardstick also can be used the univers parameter of material much smaller than the structure of electromagnetic wavelength to electromagnetic response in the material, and for example DIELECTRIC CONSTANTS and magnetic permeability μ describe.Structure through every of designing material makes the dielectric constant of material each point all identical or different with magnetic permeability; Thereby making dielectric constant and the magnetic permeability of material monolithic be certain rule arranges; Magnetic permeability that rule is arranged and dielectric constant can make material that electromagnetic wave is had the response on the macroscopic view, for example converge electromagnetic wave, divergent electromagnetic ripple, absorb electromagnetic wave etc.Such has magnetic permeability that rule arranges and the material of dielectric constant is referred to as ultra material.
As shown in Figure 1, Fig. 1 is the perspective view of the elementary cell of the ultra material of formation.The elementary cell of ultra material comprises the base material 200 that artificial micro-structural 100 and this artificial micro-structural are adhered to.Artificial micro-structural can be artificial metal's micro-structural; It has plane or three-dimensional topological structure to incident electromagnetic wave electric field and/or magnetic field generation response; Change the pattern and/or the size of the artificial metal's micro-structural on each ultra material elementary cell, can change of the response of each ultra material elementary cell incident electromagnetic wave.A plurality of ultra material elementary cells are arranged according to certain rules, can make ultra material electromagnetic wave had the response of macroscopic view.Because ultra material monolithic needs that incident electromagnetic wave is had macroscopical electromagnetic response; Therefore each ultra material elementary cell need form continuous response to the response of incident electromagnetic wave; This size that requires each ultra material elementary cell is preferably incident electromagnetic wave 1/10th wavelength less than incident electromagnetic wave 1/5th wavelength.During this section is described; To surpass material monolithic, to be divided into a plurality of ultra material elementary cells are a kind of man-made division methods; But it is convenient to know that this kind division methods is merely description; Should not regard ultra material as by a plurality of ultra material elementary cells splicings or assemble, ultra material is that artificial metal's micro-structural is arranged on the base material and can constitutes in the practical application, and technology is simple and with low cost.
The present invention utilizes above-mentioned ultra material principle design wideband to inhale the ultra material of ripple, and different with Fig. 1 is, the elementary cell that the present invention inhales the ultra material of ripple comprises the multilayer subelement, and every straton all is attached with different micro-structurals on the unit.Through designing the effect that arranging of different micro-structurals realizes that impedance matching and wideband are inhaled ripple.
Please with reference to Fig. 2, Fig. 2 inhales the cutaway view of the ultra material of ripple for wideband of the present invention.Along the electromagnetic wave propagation direction, wideband of the present invention is inhaled the ultra material of ripple and is comprised and the second surpass sheet of material 2, the first surpass sheet of material 1 and metal back layer 3.In the present embodiment, metal back layer 3 is made up of the fine copper plate.The perspective view that the first surpasses sheet of material 1 is as shown in Figure 3, and it comprises first base material 10 and is arranged in a plurality of first artificial micro-structural 11 on first base material 10; The perspective view that the second surpasses sheet of material 2 is as shown in Figure 4, and it comprises second base material 20 and is arranged in a plurality of second artificial micro-structural 21 on second base material 20.
The first artificial micro-structural 11 comprises the metal ring of a plurality of concentric settings; In the present embodiment; Comprise 6 metal rings that are provided with one heart, 6 metal rings are respectively first to the 6th metal ring from small to large by radius, and the live width of each metal ring equates; Thickness equates, and the spacing of adjacent metal annulus equates.
The second artificial micro-structural 21 is made up of a metal ring, and it is identical that the size of this metal ring and five metals in the first artificial micro-structural 11 belong to annulus.
The material of first base material 10 and second base material 20 can be identical also can be different, its material can be chosen for FR4 material, ferroelectric material, ferrite material or ceramic material etc.Can imagine ground, first base material 10 and second base material 20 can make when choosing the material with certain absorbing property that the absorbing property of the ultra material of wideband suction ripple of the present invention is better.
The thickness of bottom 3 equals the thickness of the metal ring on the first artificial micro-structural 11 and the second artificial micro-structural 21.
The material of the metal ring on the first artificial micro-structural 11 and the second artificial micro-structural 21 can be copper, silver, aluminium or other conducting metals, and it can be through etching, bore to carve, electronics is carved, ion quarter etc. is attached on first base material 10 and second base material, 20 surfaces.
In the present invention; The a plurality of first artificial micro-structural 11 is held between first base material 10 and second base material 20; In order to protect the second artificial micro-structural 21, the present invention also is coated with cover layer 4 on the second artificial micro-structural 21, and the material of cover layer 4 is identical with second base material, 20 materials.
Further, can not cause a large amount of reflections because of impedance variations is excessive when inhaling the ultra material of ripple for making electromagnetic wave incide wideband of the present invention, the present invention also cover layer 4 is provided with impedance matching layer 5.The resistance value of impedance matching layer 5 is less than the resistance value of second base material 20, makes impedance transition mechanism.
Utilize CST (Computer Simulation Technology) software emulation wideband of the present invention to inhale the absorbing property of the ultra material of ripple, simulation result is as shown in Figure 5.As can beappreciated from fig. 5, wideband of the present invention is inhaled the suction ripple frequency range broad of the ultra material of ripple, all can reach-5 to-20dB wave-absorbing effect 4 to 18GHZ, and wherein in 8.5 to 13GHZ frequencies, absorbing property the best can reach-15 to-20dB wave-absorbing effect.
Combine accompanying drawing that embodiments of the invention are described above; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. a wideband is inhaled the ultra material of ripple, it is characterized in that: comprise along what the electromagnetic wave propagation direction set gradually the second surpassing sheet of material, the first surpassing sheet of material and metal back layer; The said sheet of material that the first surpasses comprises first base material and is arranged in a plurality of first artificial micro-structural on first base material that the said sheet of material that the second surpasses comprises second base material and is arranged in a plurality of second artificial micro-structural on second base material; The said first artificial micro-structural comprises the metal ring of a plurality of concentric settings, and the said second artificial micro-structural is a metal ring.
2. wideband as claimed in claim 1 is inhaled the ultra material of ripple, it is characterized in that: the said first artificial micro-structural comprises 6 metal rings that are provided with one heart, and said 6 metal rings are respectively first to the 6th metal ring from small to large by radius; The live width of first to the 6th metal ring equates that thickness equates that the spacing of adjacent metal annulus equates.
3. wideband as claimed in claim 2 is inhaled the ultra material of ripple, it is characterized in that: it is identical that the topology of the said second artificial micro-structural and the five metals of the said first artificial micro-structural belong to annulus.
4. wideband as claimed in claim 3 is inhaled the ultra material of ripple, and it is characterized in that: the material of the said first artificial micro-structural and the second artificial micro-structural is a copper, and the thickness of said copper coin bottom equals the said first artificial micro-structural or the second artificial micro-structural thickness.
5. wideband as claimed in claim 1 is inhaled the ultra material of ripple, and it is characterized in that: said first base material is FR-4 material, ceramic material, ferroelectric material or ferrite material.
6. wideband as claimed in claim 1 is inhaled the ultra material of ripple, and it is characterized in that: said second base material is FR-4 material, ceramic material, ferroelectric material or ferrite material.
7. wideband as claimed in claim 1 is inhaled the ultra material of ripple, it is characterized in that: the said first artificial micro-structural through etching, bore carve, electronics is carved or ion is attached on first substrate surface quarter.
8. wideband as claimed in claim 1 is inhaled the ultra material of ripple, it is characterized in that: the said second artificial micro-structural through etching, bore carve, electronics is carved or ion is attached on second substrate surface quarter.
9. inhale the ultra material of ripple like each described wideband of claim 1 to 4, it is characterized in that: also be coated with cover layer on the said second artificial micro-structural, said first base material, second base material and tectal material are identical.
10. wideband as claimed in claim 9 is inhaled the ultra material of ripple, and it is characterized in that: also be provided with impedance matching layer on the said cover layer, the resistance value of said impedance matching layer is less than said cover layer resistance value.
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| CN103474727A (en) * | 2013-09-14 | 2013-12-25 | 电子科技大学 | Multi-layer metamaterial unit structure and preparation and regulation method thereof |
| CN103582401A (en) * | 2012-08-03 | 2014-02-12 | 深圳光启创新技术有限公司 | Broadband wave absorbing material, electronic equipment and method for obtaining broadband wave absorbing material |
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| CN104682010A (en) * | 2013-12-03 | 2015-06-03 | 深圳光启创新技术有限公司 | Wave-transparent meta-material |
| CN105086934A (en) * | 2014-05-06 | 2015-11-25 | 深圳光启创新技术有限公司 | Microwave absorbing composite material and preparation method therefor |
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| CN103236581B (en) * | 2013-04-09 | 2015-07-08 | 江苏大学 | Left-handed material latticed patch antenna with multi-layer composite heterostructure |
| CN103474727A (en) * | 2013-09-14 | 2013-12-25 | 电子科技大学 | Multi-layer metamaterial unit structure and preparation and regulation method thereof |
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| CN107946776A (en) * | 2017-11-21 | 2018-04-20 | 山西大学 | A kind of multiband absorbing meta-material |
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Effective date of registration: 20210705 Address after: 2 / F, software building, No.9, Gaoxin Zhongyi Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: KUANG-CHI INSTITUTE OF ADVANCED TECHNOLOGY Address before: 18B, building a, CIC international business center, 1061 Xiangmei Road, Futian District, Shenzhen, Guangdong 518034 Patentee before: KUANG-CHI INNOVATIVE TECHNOLOGY Ltd. |