CN107946776A - A kind of multiband absorbing meta-material - Google Patents
A kind of multiband absorbing meta-material Download PDFInfo
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- CN107946776A CN107946776A CN201711168422.XA CN201711168422A CN107946776A CN 107946776 A CN107946776 A CN 107946776A CN 201711168422 A CN201711168422 A CN 201711168422A CN 107946776 A CN107946776 A CN 107946776A
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- annulus
- multiband
- medium substrate
- successively
- absorbing meta
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Classifications
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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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- 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
Abstract
The present invention relates to a kind of multiband absorbing meta-material, it is therefore an objective to which the coupling effect inside wave absorbing device made of Meta Materials between each resonant element is so as to influence the technical problem of the assimilation effect of each absworption peak.The technical scheme is that：A kind of multiband absorbing meta-material, the multiband absorbing meta-material is rearranged by the tiling of some metamaterial structure units, the metamaterial structure unit includes the first material medium substrate, at least two concentric metal annulus, at least one same core insulation annulus, the second material medium substrate and metal base plate, and the first material medium substrate, concentric metal annulus, the second material medium substrate and metal base plate bond together successively from top to bottom；The present invention with the addition of insulating materials in absorbing meta-material and eliminate coupling between concentric metal annulus, make not interfereing with each other between absorption peak, stably work respective response frequency range, and solving the electromagnetic coupled in existing absorbing meta-material between multiple resonant elements influences.
Description
Technical field
The invention belongs to microwave absorbing material field, and in particular to a kind of multiband absorbing meta-material.
Background technology
With the continuous development of scientific technology, electromagnetic wave has been widely used in every field, wherein with channel radio
Believe that the influence to human being's production and life is the most notable.However, with the increasingly mature of wireless communication technique, electromagnetic pollution is asked
Topic is also increasingly severe, such as：Electromagnetic radiation can not only influence the quality of communication；Disturb the normal work of various sophisticated electronicses
Make；Particularly from the electromagnetic interference of near by frequency；The electromagnetic wave of near by frequency can seriously affect the normal transmission of one's own side's electromagnetic wave
And reception.Therefore, it is badly in need of developing a kind of absorbing material, can selectively absorbs some frequency range or certain several frequency range
Electromagnetic wave, and then ensure the normal work of other frequency range electromagnetic waves.
Absorbing meta-material is a kind of material that can absorb the electromagnetic wave energy for being incident on its surface, its operation principle is logical
Cross and rationally design the structural parameters of material and adjust the dielectric constant of material and magnetic conductivity, its in working frequency range is reached impedance
With condition, so that incident electromagnetic wave enters material internal to greatest extent, and pass through the dielectric loss in absorbing meta-material
Or/and ohmic loss, the electromagnetic wave for inciding material internal is changed into thermal energy or other energy, is realized to the complete of electromagnetic wave
U.S. absorbs.
Current multiband absorbing meta-material mainly has two classes, and one kind is to combine multiple resonators in a plane,
Forming one can be inevitable between each resonator of this kind of absorber in response to the multiband absorber at multiple frequency ranges
Coupling occurs in ground, and this coupling can make assimilation effect be affected；Another kind be multiple resonator layers are stacked be set to it is more
The absorber of Rotating fields, this make it that absorber integral thickness is thicker, and processing and manufacturing becomes more difficult.Further, since each inhale
It is apart from each other between receipts frequency range, it also limit the application of multifrequency absorbing material to a certain extent.
The content of the invention
Present invention aim to address the coupling effect made of existing Meta Materials inside wave absorbing device between each resonant element from
And influence the technical problem of the assimilation effect of each absworption peak, there is provided a kind of multiband absorbing meta-material.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of multiband absorbing meta-material is described more
Frequency range absorbing meta-material is rearranged by the tiling of some metamaterial structure units, and the metamaterial structure unit includes the first material
Medium substrate, at least two concentric metal annulus, at least one same core insulation annulus, the second material medium substrate and metal base plate,
The first material medium substrate, concentric metal annulus, the second material medium substrate and metal base plate are bonded successively from top to bottom
Together；At least two concentric metal annulus be located at from outside to inside from big to small by inside radius the first material medium substrate and
One is equipped between second material medium substrate, between each two concentric metal annulus with core insulation annulus, it is described concentric
Insulation annulus be located on the lower surface of the first material medium substrate or the upper surface of the second material medium substrate and with adjacent inner ring
The outer edge of concentric metal annulus be in contact.
Further, the material of the first material medium substrate is Rogers, Arlon, Teflon or F4B, described
The thickness of one material medium substrate is 0.3mm~0.5mm.
Further, the material of the second material medium substrate is FR-4.
Further, the material of the concentric metal annulus is copper, aluminium, silver or gold, the thickness of the concentric metal annulus
For 0.017mm to 0.036mm.
Further, the material of the same core insulation annulus is SrTiO3, PET or rubber.
Further, the length of side of the metamaterial structure unit is 21mm~23mm, and thickness is 2.3~2.6mm.
Further, the inside radius of the concentric metal annulus and outer radius are successively decreased successively from outside to inside, concentric metal circle
The width of ring is incremented by successively from outside to inside, and the spacing between neighboring concentric metal ring is successively decreased successively from outside to inside.
Further, the inside radius of the same core insulation annulus and outer radius are successively decreased successively from outside to inside, are justified with core insulation
The width of ring successively decreases successively from outside to inside.
The beneficial effects of the invention are as follows：
1st, the present invention with the addition of insulating materials in absorbing meta-material and eliminate coupling between concentric metal annulus, make suction
It is not interfere with each other between receipts peak value, stably work respective response frequency range, solves multiple resonance lists in existing absorbing meta-material
Electromagnetic coupled between member influences, and realizes that the multifrequency in S-band and C-band absorbs；
2nd, the resonator in absorbing meta-material construction unit of the present invention is simple circular ring type, convenient processing and manufacturing；
3rd, multiband absorbing meta-material integral thickness of the present invention is about 2.5mm or so, compared with similar absorbing meta-material, tool
There are relatively thin thickness, good absorption effect, available for fields such as wireless telecommunications, electromagnetic shielding, heat radiation detections.
4th, multiband absorbing meta-material of the invention can realize that multiband absorbs by 2-7GHz in relatively narrow scope, and
Absorptivity reaches more than 99%.
Brief description of the drawings
Fig. 1 is the structure diagram of metamaterial structure unit in the embodiment of the present invention 1；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the structure diagram of metamaterial structure unit in the embodiment of the present invention 2；
Fig. 4 is the structure diagram of metamaterial structure unit in the embodiment of the present invention 3；
Fig. 5 is the assimilation effect figure of the embodiment of the present invention 1；
Fig. 6 is the assimilation effect figure of the embodiment of the present invention 2；
Fig. 7 is the assimilation effect figure of the embodiment of the present invention 3；
In figure, 1- the first material medium substrates, 2- concentric metal annulus, 3- is the same as core insulation annulus, 4- the second material media
Substrate, 5- metal base plates.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Embodiment 1
A kind of multiband absorbing meta-material in the present embodiment, the multiband absorbing meta-material is by some metamaterial structures
Unit tiling rearranges, and as depicted in figs. 1 and 2, the length of side of the metamaterial structure unit is 21mm~23mm, and thickness is
2.3~2.6mm.It is concentric that the metamaterial structure unit includes the concentric metal annulus 2, four of the first material medium substrate 1, five
Insulate annulus 3, the second material medium substrate 4 and metal base plate 5, the first material medium substrate 1, concentric metal annulus 2, the
Two material medium substrates 4 and metal base plate 5 bond together successively from top to bottom；Five concentric metal annulus 2 are by interior half
Footpath is located between the first material medium substrate 1 and the second material medium substrate 4 from outside to inside from big to small, and each two is concentric
It is located between metal ring 2 equipped with one with core insulation annulus 3, the same core insulation annulus 3 under the first material medium substrate 1
It is in contact on surface or the upper surface of the second material medium substrate 4 and with the outer edge of the concentric metal annulus 2 of adjacent inner ring.
Five concentric metal annulus 2 are respectively the first to the 5th concentric metal annulus from inside to outside, and five golden with one heart
The inside radius and outer radius for belonging to annulus 2 successively decrease successively from outside to inside, and the width of concentric metal annulus is incremented by successively from outside to inside, phase
Spacing between adjacent concentric metal annulus is successively decreased successively；The inside radius ecto-entad of five concentric metal annulus 2 is respectively
9.10mm、7.48mm、6.09mm、4.93mm、4.00mm；The width of concentric metal annulus be respectively 0.50mm, 0.52mm,
0.54mm、0.56mm、0.58mm；Spacing between neighboring concentric metal ring be respectively 1.10mm, 0.85mm, 0.60mm,
0.35mm。
Described four are respectively first to fourth with core insulation annulus from outside to inside with core insulation annulus 3, and described four same
The inside radius and outer radius of core insulation annulus 3 successively decrease successively from outside to inside, and the width with core insulation annulus is passed successively from outside to inside
Subtract, successively decrease successively with the spacing between core insulation annulus；Four inside radius with core insulation annulus 3 are respectively from outside to inside
8.00mm、6.63mm、5.49mm、4.58mm；Width with core insulation annulus be respectively 0.40mm, 0.30mm, 0.20mm,
0.10mm；Spacing between neighboring concentric insulation annulus is respectively 1.07mm, 0.94mm, 0.81mm.
The concentric metal annulus 2 and with core insulation annulus 3 by the regular arrangement of inside and outside radius size, will can absorb
Peak is closely compressed in less scope, so that (2-7GHz) realizes that multiband absorbs in relatively narrow scope, and is absorbed
Rate reaches more than 99%.
The material of the first material medium substrate 1 is Rogers (Rogers RO3006), and permittivity ε=6.15, are damaged
Consume tangent value tan δ=0.0025,0.3~0.5mm of thickness；
The material of the second material medium substrate 4 is FR-4, and dielectric constant is 4.2 to 4.5, loss tangent value tan δ=
0.02, thickness 2mm；
The material of the concentric metal annulus 2 and metal base plate 5 is copper, conductivityσ=5.8 × 107S/m, thickness are
0.017mm to 0.036mm；
The material of the same core insulation annulus 3 is SrTiO3, permittivity ε=300, loss tangent value tan δ=0.005,
Thickness is 0.017mm to 0.036mm.
Embodiment 2
A kind of multiband absorbing meta-material in the present embodiment, the multiband absorbing meta-material is by some metamaterial structures
Unit periodic arrangement is formed, as shown in figure 3, difference lies in by metamaterial structure unit in embodiment 1 with embodiment 1
Second concentric metal annulus and first remove with core insulation annulus, obtain wave absorbing device, ensure other sizes parameter and are made
Material and simulated conditions are in the same manner as in Example 1.
Embodiment 3
A kind of multiband absorbing meta-material in the present embodiment, the multiband absorbing meta-material is by some metamaterial structures
Unit periodic arrangement is formed, as shown in figure 4, difference lies in by metamaterial structure unit in embodiment 1 with embodiment 1
Second concentric metal annulus, the 4th concentric metal annulus, first justify with core insulation annulus and the 3rd with core insulation
Ring removes, and obtains wave absorbing device, ensures that other sizes parameter and used material and simulated conditions are in the same manner as in Example 1.
In above-described embodiment, the concentric metal annulus 2 and the number with core insulation annulus 3 can absorb frequency according to required
The number of section correspondingly increases or reduces, and the size of annulus can also be adjusted according to the wave band of required absorption.It is described
The material of first material medium substrate 1 can also be Arlon (refined dragon), Teflon (Te Folong) or F4B；The concentric metal circle
The material of ring 2 and metal base plate 5 can also be aluminium, silver or gold；The material of the same core insulation annulus 3 can also be PET or rubber
Glue.
Material is absorbed to the multiband in the embodiment of the present invention 1~3 using the electromagnetic simulation software HFSS based on FInite Element
Material carries out simulation calculation, the surface of electromagnetic wave vertical incidence to absorbing material, since resonance structure of the present invention is
Metal ring, mutually perpendicular electric field and magnetic direction could be provided as any direction.Obtained reflectance factor S will be emulated11With
Transmission coefficient S21Substitute into absorptivity calculation formula A=1- | S11|2-|S21|2, because the metal base plate in bottom has blocked electromagnetic wave
Transmission so that transmission coefficient S21=0, the calculation formula of absorptivity can be reduced to A=1- | S11|2.By what is be calculated
Absorbance curves, as shown in figure 5, be the assimilation effect figure of embodiment 1, the results show meta-material absorber can be
Absorptivity at 2.48GHz, 2.96GHz, 3.66GHz, 4.63GHz, 6.13GHz respectively reaches 99.5%, 99.2%,
99.0%, 99.8%, 99.1%.
As shown in fig. 6, the assimilation effect figure for embodiment 2, it can be seen that the absorber can in 2.51GHz,
Absorptivity at 3.70GHz, 4.66GHz, 6.13GHz respectively reaches 99.1%, 99.2%, 99.9%, 99.4%,
As shown in fig. 7, the assimilation effect figure for embodiment 3, it can be seen that the absorber can in 2.50GHz,
Absorptivity at 3.75GHz, 6.15GHz respectively reaches 99.0%, 99.8%, 99.8%.
Claims (8)
- A kind of 1. multiband absorbing meta-material, it is characterised in that：The multiband absorbing meta-material is by some metamaterial structure lists Member tiling rearranges, and the metamaterial structure unit includes the first material medium substrate (1), at least two concentric metal annulus (2), at least one same core insulation annulus (3), the second material medium substrate (4) and metal base plate (5), the first material medium Substrate (1), concentric metal annulus (2), the second material medium substrate (4) and metal base plate (5) are bonded in one successively from top to bottom Rise；At least two concentric metal annulus (2) is located at the first material medium from outside to inside from big to small by inside radius and outer radius It is exhausted with one heart equipped with one between each two concentric metal annulus (2) between substrate (1) and the second material medium substrate (4) Edge annulus (3), the same core insulation annulus (3) are located at lower surface or the second material medium base of the first material medium substrate (1) It is in contact on the upper surface of plate (4) and with the outer edge of the concentric metal annulus (2) of adjacent inner ring.
- A kind of 2. multiband absorbing meta-material according to claim 1, it is characterised in that：The first material medium substrate (1) material is Rogers, Arlon, Teflon or F4B, the thickness of the first material medium substrate (1) for 0.3mm~ 0.5mm。
- A kind of 3. multiband absorbing meta-material according to claim 1, it is characterised in that：The second material medium substrate (4) material is FR-4.
- A kind of 4. multiband absorbing meta-material according to claim 1, it is characterised in that：The concentric metal annulus (2) Material be copper, aluminium, silver or gold, the thickness of the concentric metal annulus (2) is 0.017mm to 0.036mm.
- A kind of 5. multiband absorbing meta-material according to claim 1, it is characterised in that：The same core insulation annulus (3) Material be SrTiO3, PET or rubber.
- A kind of 6. multiband absorbing meta-material according to claim 1, it is characterised in that：The metamaterial structure unit The length of side is 21mm~23mm, and thickness is 2.3~2.6mm.
- A kind of 7. multiband absorbing meta-material according to claim 1, it is characterised in that：The concentric metal annulus (2) Inside radius and outer radius successively decrease successively from outside to inside, the width of concentric metal annulus (2) is incremented by successively from outside to inside, adjacent same Spacing between heart metal ring (2) is successively decreased successively from outside to inside.
- A kind of 8. multiband absorbing meta-material according to claim 2, it is characterised in that：The same core insulation annulus (3) Inside radius and outer radius successively decrease successively from outside to inside, the width with core insulation annulus (3) successively decreases successively from outside to inside.
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| CN201711168422.XA CN107946776A (en) | 2017-11-21 | 2017-11-21 | A kind of multiband absorbing meta-material |
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| CN109443550A (en) * | 2018-09-19 | 2019-03-08 | 天津大学 | Terahertz micro-metering bolometer based on CMOS technology multifrequency Meta Materials absorbing structure |
| CN111641046A (en) * | 2020-05-07 | 2020-09-08 | 宁波大学 | Microwave band broadband circular dichroism chirality wave absorber |
| CN113015424A (en) * | 2021-04-06 | 2021-06-22 | 浙江师范大学 | Superstructure millimeter wave absorbing plate and application thereof |
| CN113540820A (en) * | 2021-07-20 | 2021-10-22 | 合肥工业大学 | Stepped cylindrical resonance structure and absorber of multi-frequency electromagnetic waves |
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