CN109786973A - A kind of chirality microwave absorption Meta Materials and its preparation and application - Google Patents
A kind of chirality microwave absorption Meta Materials and its preparation and application Download PDFInfo
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Abstract
The present invention is a kind of preparation and application of chiral microwave absorption Meta Materials.The structural unit of the material is chiral helical structure, and the spiral of various outer diameter is coaxial nested perpendicular to substrate and is distributed in two-dimensional array.The preparation method of the material: using chiral helical structure as periodic structure unit, its coaxial nesting is distributed perpendicular to substrate in two-dimensional array, the microwave absorption Meta Materials of different cycles are constructed.The material has significant strong absorption-wideband-lightweight microwave absorption effect, and preparation process is simple, and raw material is cheap and easy to get, and performance can easily be accommodated, and has broad application prospects, such as militarily, can be stealthy to fixed military equipment, building, tank etc.；In civil field, the application that can be used in the fields such as microwave dark room, electromagnetic compatibility, electromagnetic pollution protection.
Description
Technical field
The present invention relates to electromagnetic functional material fields, and in particular to a kind of microwave absorption Meta Materials of chiral building block
Preparation and application.
Background technique
So-called electromagnetism Meta Materials refer to some artificial composite junctions with extraordinary physical property not available for natural material
Structure or composite material.By orderly being designed the key physical scale on material structure, people can break through certain natures
The limitation of rule, artificial " the new medium " for obtaining the extraordinary physical property far different with natural medium.Meta Materials microwave absorption
Newcomer of the structure as microwave absorbing material family, with traditional veneer structure microwave-absorbing body and sandwich microwave-absorbing body
It is thickness is thin, absorption band is wide etc. compared to biggest advantage, any frequency range may be implemented by uniform zoom EMR electromagnetic resonance structure
It is perfect absorb, be with a wide range of applications in field of microwave absorption.The performance of existing Meta Materials microwave absorbing structure is main
Design depending on its artificial structure.
Currently, the still rarely seen patent report of preparation about chiral microwave absorption Meta Materials, and only a small amount of document and specially
Benefit discloses the preparation of broadband microwave absorption Meta Materials.Wherein Chinese patent literature (CN107946776A) discloses a kind of multifrequency
The preparation of section microwave absorption Meta Materials.Chinese patent literature (CN107093804A), which discloses, a kind of introduces Meta Materials for water droplet
Method in design realizes the microwave absorption method to incoming free-space electromagnetic wave within the scope of broad frequency band.Conclusion is opened up
The method of wide microwave absorbing material frequency band can be divided into two classes, and one kind is to combine multiple resonator elements in a plane, shape
It can be in response to the multiband absorber at multiple frequency ranges, between each resonator of this kind of absorber inevitably at one
It will appear coupling, and this coupling can make assimilation effect be affected；Another kind is to stack multiple resonator layers to be set to multilayer
The absorber of structure, this makes absorber integral thickness thicker, and processing and manufacturing becomes more difficult.
In order to overcome the problems, such as that the above method exists, in the present invention, we, will using chiral helical structure as periodic unit
Its coaxial nesting is distributed perpendicular to substrate in two-dimensional array, has designed and prepared microwave absorption Meta Materials.This be mainly based upon into
The resonant interaction between violent electromagentic resonance and helical structure occurs between radio magnetic wave and its helical structure unit.When entering radio
When the circular polarisation mode of magnetic wave and the circular polarisation mode of helical structure match, helical structure, which could resonate, receives incident electromagnetism
Wave, and very strong surface current can be induced on helical structure, and then generate strong RESONANCE ABSORPTION.Therefore, helical structure
Chiral Meta Materials have good wideband Microwave Absorption Properties, this for the design of wide band electromagnetic wave absorbing material provide one kind newly
Thinking has important military, civilian and academic reference value.
Summary of the invention
The present invention is directed to a kind of chiral microwave suction is provided from the mentality of designing of broadband light chirality microwave absorption Meta Materials
Receive the preparation and application of Meta Materials.The mentality of designing of material is novel, preparation process is simple, it is at low cost, be easily achieved, using wide
It is general.
The present invention solves its technical problem, and the following technical solution is employed:
Chirality microwave absorption Meta Materials provided by the invention, structural unit are chiral helical structure, the spiral shell of various outer diameter
Rotation is coaxial nested perpendicular to substrate and is distributed in two-dimensional array.
The chiral helical structural unit is one of spring or tower spring.
The outer diameter of the chiral helical structural unit is 0.5~3cm, and line footpath is 0.45~1mm, and circle number is 1.5~6
Circle, pitch are 2.5~5mm.
The material of the chiral helical structural unit is iron, cobalt, nickel, copper or alloy.
The baseplate material is one of FR4, and dielectric constant is 3.6~4.2, and substrate thickness is 1~2mm.
The Meta Materials are outer diameter 3cm, 3cm and 1cm, the chiral helical knot of 3cm and 2cm or 3cm, 2cm and 1cm
Structure unit is coaxial nested perpendicular to the FR4 substrate of 180mm × 180mm and is distributed in 5 × 5 two-dimensional arrays；Or outer diameter is 1cm,
2cm, 2cm and 0.5cm, 2cm and 1cm, the chiral helical structural unit of 2cm, 1cm and 0.5cm are perpendicular to 180mm × 180mm's
FR4 substrate is coaxial nested and is distributed in 8 × 8 two-dimensional arrays；Or outer diameter is that 1cm is vertical with the chiral helical structural unit of 0.5cm
In the FR4 substrate of 180mm × 180mm, coaxial nested and two-dimensional array in 14 × 14 is distributed.
Chirality microwave absorption Meta Materials of the invention, in 1~40GHz frequency range, incidence angle is 30 °~120 °, small
In equal to -10dB effective bandwidth be 6.3~27.1GHz；Absorption maximum is -20.8~-43.9dB.
The present invention prepares above-mentioned chiral microwave absorption Meta Materials using following methods, it may be assumed that with chiral helical structure is week
Its coaxial nesting is distributed perpendicular to substrate in two-dimensional array, constructs the microwave absorption Meta Materials of different cycles by phase structural unit.
Chirality microwave absorption Meta Materials prepared by the present invention are in application, it has significant " broadband-lightweight-absorbs by force " micro-
Wave sink effect, the outer diameter of the chiral helical structural unit by changing Meta Materials, enclose number, pitch, incident angle to adjust at line footpath
Control the EMR electromagnetic resonance of Meta Materials microwave absorbing structure；Helical structure unit can resonate and receive incident electromagnetic wave, incident by control
The coupling and electromagnetic response characteristic of electromagnetic wave and Meta Materials, can consume incident electromagnetic wave, to significantly increase Meta Materials pair
The absorbability of electromagnetic wave achievees the effect that multiband, lightweight, absorbs by force.
Chirality microwave absorption Meta Materials of the invention militarily can be hidden to fixed military equipment, building, tank etc.
Body；In civil field, the application that can be used in the fields such as microwave dark room, electromagnetic compatibility, electromagnetic pollution protection.
The chiral microwave absorption Meta Materials and traditional microwave absorbing material and other microwaves that the present invention designs and prepares are inhaled
It receives Meta Materials to compare, has the advantages that following main and good effect:
(1) design concept is novel, and preparation process is simple, easily controllable；
(2) preparing resulting microwave absorption Meta Materials has the characteristics that small surface density, microwave absorption bandwidth, absorption are strong,
It is able to satisfy the absorption requirement of different frequency bands；
(3) raw material is cheap and easy to get, and preparation cost is low, environmentally protective, high-efficient, using than wide, is easy to application.
Detailed description of the invention
Fig. 1-3 is the reflectance curve of embodiment 1 obtained sample object figure and test.
Fig. 4-6 is the reflectance curve of embodiment 2 obtained sample object figure and test.
Fig. 7-9 is the reflectance curve of embodiment 3 obtained sample object figure and test.
Figure 10-12 is the reflectance curve of embodiment 4 obtained sample object figure and test.
Figure 13-15 is the reflectance curve of embodiment 5 obtained sample object figure and test.
Figure 16-18 is the reflectance curve of embodiment 6 obtained sample object figure and test.
Figure 19-21 is the reflectance curve of embodiment 7 obtained sample object figure and test.
Figure 22-24 is the reflectance curve of embodiment 8 obtained sample object figure and test.
Figure 25-27 is the reflectance curve of embodiment 9 obtained sample object figure and test.
Figure 28-30 is the reflectance curve of embodiment 10 obtained sample object figure and test.
Figure 31-33 is the reflectance curve of embodiment 11 obtained sample object figure and test.
Figure 34-36 is the reflectance curve of embodiment 12 obtained sample object figure and test.
Figure 37-39 is the reflectance curve of embodiment 13 obtained sample object figure and test.
Figure 40-42 is the reflectance curve of embodiment 14 obtained sample object figure and test.
Specific embodiment
The present invention is a kind of preparation and application of chiral microwave absorption Meta Materials.With chiral helical structure (spring and tower spring)
Divided by coaxial nesting vertical in 2mm thickness, the FR4 substrate of 180mm × 180mm in two-dimensional array for periodic structure unit
Cloth constructs the microwave absorption Meta Materials of different cycles.The helical structure line 0.5~3cm of outer diameter, 0.45~1mm of line footpath enclose number
1.5~6 circles, 2.5~5mm of screw pitch；The two-dimensional array that the period of Meta Materials is 5 × 5,8 × 8,14 × 14.When incident electromagnetic wave
When polarization mode and the polarization mode of helical structure match, very strong surface current can be induced, and then play resonant microwave
The effect of absorption.Mentality of designing of the invention is novel, which has significant strong absorption-wideband-light
Matter microwave absorption effect: in 1~40GHz frequency range, the effective bandwidth less than -10dB is up to 27.1GHz；Most strong absworption peak
For -43.9dB.And preparation process is simple, and raw material is cheap and easy to get, and performance can easily be accommodated, and has broad application prospects.
The present invention is by changing the periodicity of structural unit arrangement, the outer diameter of helical structure unit, line footpath, circle number, pitch
And the parameters such as incident angle come the interaction between control structure unit, the microwave of incident electromagnetic wave and chiral building block
Coupling and the response mechanism of Meta Materials are absorbed, and then obtains the microwave absorbing structure of lightweight, wideband.
Below with reference to examples and drawings, the invention will be further described, but is not limited solely to the following examples.
Embodiment 1
The concentric circles of DXP software design 5 × 5 are first used, concentric diameter of a circle is respectively 1cm, 2cm, 3cm.Connection is complete
Automatic drill mills engraving all-in-one machine, and 2.0mm × 180mm × 180mm FR4 substrate is fixed on carved region, carries out through-carved work；Again
The iron spring that outer diameter 3cm, line footpath 0.45mm, pitch 5mm, circle number 3 are enclosed, is successively embedded in the hollow out gap of concentric circles, is in 5
× 5 array distribution obtains single spiral chirality Meta Materials.
The reflectivity of the chiral material is tested using arch form method.Its sample object figure and reflectance curve such as Fig. 1-Fig. 3 institute
Show.As it can be seen that bandwidth of the chirality microwave absorption Meta Materials less than or equal to -10dB is about when electromagnetic wave incident angle is 120 °
For 10.4GHz, most strong absworption peak is -40.1dB.
Embodiment 2
It is identical as 1 step of embodiment, the difference is that outer diameter 3cm, line footpath 0.45mm, pitch 5mm, circle number 3 is selected to enclose herein
Big iron spring and the small iron spring that encloses of outer diameter 2cm, line footpath 0.45mm, pitch 5mm, circle number 3, two kinds of helical structures are carried out same
Axis is nested, is distributed in 5 × 5 two-dimensional array.Its sample object figure and reflectance curve are as shown in Fig. 4-Fig. 6.As it can be seen that working as electromagnetism
When wave incident angle is 90 °, bandwidth of the chirality microwave absorption Meta Materials less than or equal to -10dB is about 17.1GHz, most strong to inhale
Receipts peak is -31.3dB；When electromagnetic wave incident angle is 120 °, which is less than or equal to the frequency of -10dB
Bandwidth is about 27.1GHz, and most strong absworption peak is -33.7dB.
Embodiment 3
It is identical as 1 step of embodiment, the difference is that outer diameter 3cm, line footpath 0.45mm, pitch 5mm, circle number 3 is selected to enclose herein
Big cobalt-nickel alloy spring and outer diameter 2cm, line footpath 0.45mm, pitch 5mm, circle number 3 enclose small cobalt-nickel alloy spring and outer diameter
Three kinds of helical structures are carried out coaxial nesting, are in 5 by the small cobalt-nickel alloy spring that 1cm, line footpath 0.5mm, pitch 5mm, circle number 3 enclose
× 5 two-dimensional array distribution.Its sample object figure and test reflectance curve are as shown in Fig. 7-Fig. 9.As it can be seen that working as electromagnetic wave incident
When angle is 60 °, which is about 9.1GHz less than or equal to the bandwidth of -10dB, most strong absworption peak for -
20.8dB
Embodiment 4
It is identical as 1 step of embodiment, the difference is that it is big to select outer diameter 3cm, line footpath 1mm, pitch 5mm, circle number 3 to enclose herein
The spring and outer diameter that spring and outer diameter 2cm, line footpath 0.6mm, pitch 5mm, circle number 3 enclose be 1cm, line footpath 0.5mm, pitch 5mm,
The little spring that number 3 encloses is enclosed, three kinds of helical structures carry out nesting, are distributed in 5 × 5 two-dimensional array.Its sample object figure and test
Reflectance curve is as shown in Figure 10-Figure 12, it is seen then that when electromagnetic wave incident angle is 60 °, the chirality microwave absorption Meta Materials are small
It is about 10.7GHz in the bandwidth equal to -10dB, most strong absworption peak is -29.3dB.
Embodiment 5
It is identical as 1 step of embodiment, but with the concentric circles of DXP software design 8 × 8, concentric diameter of a circle is
0.5cm, 1cm, 2cm, connection full-automatic drilling mill engraving all-in-one machine, through-carved work are carried out on the substrate of 1.0mm thickness.Other and reality
Apply that 1 step of example is identical, unlike select outer diameter 1cm, line footpath 0.5mm, pitch 5mm, circle number 3 to enclose herein small iron-nickel alloy bullet
Spring is distributed in 8 × 8 two-dimensional arrays.Its sample object figure and test reflectivity results are as shown in Figure 13-Figure 15, it is seen then that work as electromagnetism
When wave incident angle is 90 °, bandwidth of the chirality microwave absorption Meta Materials less than or equal to -10dB is about 6.3GHz, most strong to inhale
Receipts peak is -21.1dB；When electromagnetic wave incident angle is 120 °, which is less than or equal to the frequency of -10dB
Bandwidth is about 7.8GHz, and most strong absworption peak is -35.6dB.
Embodiment 6
It is identical as 5 step of embodiment, the difference is that selecting outer diameter 2cm, 0.45mm line footpath, 5mm pitch, 3 bullets enclosed herein
Spring is distributed in 8 × 8 two-dimensional arrays.Its sample object figure and test reflectance curve are as shown in Figure 16-Figure 18, it is seen then that work as electromagnetism
When wave incident angle is 90 °, bandwidth of the chirality microwave absorption Meta Materials less than or equal to -10dB is about 21.3GHz, most strong to inhale
Receipts peak is -34.2dB；When electromagnetic wave incident angle is 120 °, which is less than or equal to the frequency of -10dB
Bandwidth is about 19.5GHz, and most strong absworption peak is -39.1dB.
Embodiment 7
It is identical as 5 step of embodiment, the difference is that selecting outer diameter 2cm herein, line footpath 0.45mm, pitch 5mm, enclosing number 3
Big spring is nested with outer diameter 0.5cm, line footpath 0.5mm, pitch 2.5mm, the circle little spring progress of number 6, and is in 8 × 8 two-dimensional arrays
Distribution, sample object figure and test reflectance curve are as shown in Figure 19-Figure 21, it is seen then that when electromagnetic wave incident angle is 90 °
When, bandwidth of the chirality microwave absorption Meta Materials less than or equal to -10dB is about 23.8GHz, and most strong absworption peak is -42.6dB；
When electromagnetic wave incident angle is 120 °, bandwidth of the chirality microwave absorption Meta Materials less than or equal to -10dB is about
15.8GHz, most strong absworption peak are -38.3dB.
Embodiment 8
It is identical as 5 step of embodiment, the difference is that selecting outer diameter 2cm herein, line footpath 0.45mm, pitch 5mm, enclosing number 3
Big spring is nested with outer diameter 1cm, line footpath 0.5mm, pitch 5mm, the circle little spring progress of number 3, and is distributed in 8 × 8 two-dimensional arrays.
Its sample object figure and test reflectance curve are as shown in Figure 22-Figure 24, it is seen then that when electromagnetic wave incident angle is 60 °, the hand
Property microwave absorption Meta Materials less than or equal to the bandwidth of -10dB be about 9.6GHz, most strong absworption peak is -28.6dB.
Embodiment 9
It is identical as 5 step of embodiment, the difference is that selecting outer diameter 2cm herein, line footpath 0.6mm, pitch 5mm, enclosing the big of number 3
Spring is nested with outer diameter 1cm, line footpath 0.5mm, pitch 5mm, the circle little spring progress of number 3, and is distributed in 8 × 8 two-dimensional arrays.Its
Sample object figure and test reflectance curve are as shown in Figure 25-Figure 27, it is seen then that when electromagnetic wave incident angle is 60 °, the chirality
Bandwidth of the microwave absorption Meta Materials less than or equal to -10dB is about 9.2GHz, and most strong absworption peak is -28.8dB.
Embodiment 10
It is identical as 5 step of embodiment, the difference is that selecting outer diameter 2cm herein, line footpath 0.45mm, pitch 5mm, enclosing number 3
Big spring, outer diameter 1cm, line footpath 0.5mm, pitch 5mm, enclose number 3 spring and outer diameter 0.5cm, line footpath 0.5mm, pitch 2.5mm,
The little spring for enclosing number 6 carries out nesting, and is distributed in 8 × 8 two-dimensional arrays.Its sample object figure and test reflectance curve are as schemed
Shown in 28-Figure 30, it is seen then that when electromagnetic wave incident angle is 30 °, the chirality microwave absorption Meta Materials are less than or equal to-10dB's
Bandwidth is about 10.4GHz, and most strong absworption peak is -28.1dB；When electromagnetic wave incident angle is 60 °, the chirality microwave absorption
Bandwidth of the Meta Materials less than or equal to -10dB is about 24.3GHz, and most strong absworption peak is -27.9dB.
Embodiment 11
It is identical as 5 step of embodiment, the difference is that selecting outer diameter 2cm herein, line footpath 0.45mm, pitch 5mm, enclosing number 6
Big spring, outer diameter 1cm, line footpath 0.5mm, pitch 5mm, the big spring and outer diameter 0.5cm, line footpath 0.5mm, pitch for enclosing number 3
2.5mm, the little spring for enclosing number 6 carry out nesting, and are distributed in 8 × 8 two-dimensional arrays.Its sample object figure and test reflectance curve
As shown in Figure 31-Figure 33, it is seen then that when electromagnetic wave incident angle be 30 ° when, the chirality microwave absorption Meta Materials less than or equal to-
The bandwidth of 10dB is about 14.3GHz, and most strong absworption peak is -37.5dB；When electromagnetic wave incident angle is 60 °, the chirality is micro-
It is about 24.9GHz that wave, which absorbs bandwidth of the Meta Materials less than or equal to -10dB, and most strong absworption peak is -42.5dB.
Embodiment 12
It is identical as 5 step of embodiment, the difference is that selecting outer diameter 2cm, line footpath 0.45mm, pitch 5mm, circle number 1.5 herein
Big spring, outer diameter 1cm, line footpath 0.5mm, pitch 5mm, enclose number 3 spring and outer diameter 0.5cm, line footpath 0.5mm, pitch
2.5mm, the little spring for enclosing number 6 carry out nesting, and are distributed in 8 × 8 two-dimensional arrays.Its sample object figure and test reflectance curve
As shown in Figure 34-Figure 36, it is seen then that when electromagnetic wave incident angle be 30 ° when, the chirality microwave absorption Meta Materials less than or equal to-
The bandwidth of 10dB is about 7GHz, and most strong absworption peak is -33.5dB；When electromagnetic wave incident angle is 60 °, which inhales
Receiving bandwidth of the Meta Materials less than or equal to -10dB is about 10.6GHz, and most strong absworption peak is -43.9dB.
Embodiment 13
It is identical as 1 step of embodiment, but with the concentric circles of DXP software design 14 × 14, concentric diameter of a circle difference
Full-automatic drilling is connected for 1cm, 0.5cm and mills engraving all-in-one machine, and the FR4 substrate of 180 × 180mm of 2.0mm thickness is fixed on carved region,
Carry out through-carved work.Diameter 0.5cm, line footpath 0.5mm, pitch 2.5mm, the spring and outer diameter 1cm, line footpath for enclosing number 6 are selected herein
0.5mm, pitch 5mm, the spring progress nesting of number 3 is enclosed, and is distributed in 14 × 14 two-dimensional arrays.Its sample object figure and test are anti-
Rate curve is penetrated as shown in Figure 37-Figure 39, it is seen then that when electromagnetic wave incident angle is 30 °, which is less than
Bandwidth equal to -10dB is about 10.7GHz, and most strong absworption peak is -26.6dB；When electromagnetic wave incident angle is 60 °, the hand
Property microwave absorption Meta Materials less than or equal to the bandwidth of -10dB be about 15.7GHz, most strong absworption peak is -34.5dB；Work as electromagnetic wave
When incident angle is 90 °, bandwidth of the chirality microwave absorption Meta Materials less than or equal to -10dB is about 23.3GHz, most strong to absorb
Peak is -33.8dB；When electromagnetic wave incident angle is 120 °, which is less than or equal to the frequency band of -10dB
Width is about 13.4GHz, and most strong absworption peak is -33.4dB.
Embodiment 14
It is identical as 2 step of embodiment, the difference is that selecting outer diameter 3cm herein, line footpath 1mm, pitch 3.75mm, enclosing number 4
The trourelle spring that big tower spring and outer diameter 1cm, line footpath 0.5mm, pitch 3.75mm, circle number 4 enclose, two kinds of tower springs is carried out coaxial nested
And it is distributed in 5 × 5 two-dimensional arrays.Its sample object figure and test reflectance curve are as shown in Figure 40-Figure 42.As it can be seen that working as electromagnetism
When wave incident angle is 90 °, bandwidth of the chirality microwave absorption Meta Materials less than or equal to -10dB is about 15.7GHz, most strong to inhale
Receipts peak is -35.4dB；When electromagnetic wave incident angle is 120 °, which is less than or equal to the frequency of -10dB
Bandwidth is about 24.5GHz, and most strong absworption peak is -41.1dB.
Claims (10)
1. a kind of chirality microwave absorption Meta Materials, it is characterized in that structural unit is chiral helical structure, the spiral of various outer diameter is hung down
Directly in the coaxial nesting of substrate and in two-dimensional array distribution.
2. chirality microwave absorption Meta Materials as described in claim 1, it is characterised in that the chiral helical structural unit is
One of spring or tower spring.
3. chirality microwave absorption Meta Materials as described in claim 1, it is characterised in that the chiral helical structural unit
Outer diameter is 0.5~3cm, and line footpath is 0.45~1mm, and circle number is 1.5~6 circles, and pitch is 2.5~5mm.
4. chirality microwave absorption Meta Materials as described in claim 1, it is characterised in that the chiral helical structural unit
Material is iron, cobalt, nickel, copper or alloy.
5. chirality microwave absorption Meta Materials as described in claim 1, it is characterised in that the baseplate material is one in FR4
Kind, dielectric constant is 3.6~4.2, and substrate thickness is 1~2mm.
6. chirality microwave absorption Meta Materials as described in claim 1, it is characterized in that the Meta Materials are, outer diameter 3cm,
FR4 substrate of the chiral helical structural unit of 3cm and 1cm, 3cm and 2cm or 3cm, 2cm and 1cm perpendicular to 180mm × 180mm
Coaxial nesting is simultaneously distributed in 5 × 5 two-dimensional arrays；Or outer diameter is 1cm, 2cm, 2cm and 0.5cm, 2cm and 1cm, 2cm, 1cm with
The chiral helical structural unit of 0.5cm is coaxial nested perpendicular to the FR4 substrate of 180mm × 180mm and in 8 × 8 two-dimensional arrays point
Cloth；Or outer diameter be 1cm and the chiral helical structural unit of 0.5cm perpendicular to 180mm × 180mm FR4 substrate it is coaxial it is nested simultaneously
It is distributed in 14 × 14 two-dimensional array.
7. chirality microwave absorption Meta Materials as described in claim 1, it is characterized in that in 1~40GHz frequency range, incidence angle
It is 30 °~120 °, the effective bandwidth less than or equal to -10dB is 6.3~27.1GHz；Absorption maximum is -20.8~-43.9dB.
8. a kind of preparation of chirality microwave absorption Meta Materials, it is characterized in that using described in following methods preparation claim 1-7
Chiral microwave absorption Meta Materials: using chiral helical structure as periodic structure unit, by its coaxial nesting perpendicular to substrate in two dimension
Array distribution constructs the microwave absorption Meta Materials of different cycles.
9. according to claim 8 method preparation chiral microwave absorption Meta Materials, it is characterized in that the Meta Materials in application, its
With significant " broadband-lightweight-absorbs by force " microwave absorption effect, by change Meta Materials chiral helical structural unit it is outer
Diameter, line footpath enclose number, pitch, incident angle to regulate and control the EMR electromagnetic resonance of Meta Materials microwave absorbing structure；Helical structure unit can be total to
Vibration receives incident electromagnetic wave, can be by incoming electromagnetic by controlling the coupling and electromagnetic response characteristic of incident electromagnetic wave and Meta Materials
Wave consumes, to significantly increase Meta Materials to the absorbability of electromagnetic wave, achievees the effect that multiband, lightweight, absorbs by force.
10. the application of any chiral microwave absorption Meta Materials in claim 1 to 7, it is characterized in that militarily, it can be right
Fixed military equipment, building, tank etc. are stealthy；In civil field, it can be used for microwave dark room, electromagnetic compatibility, electromagnetic pollution protection
Application in equal fields.
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| CN111205820A (en) * | 2020-02-10 | 2020-05-29 | 大连理工大学 | Multifunctional bionic wave-absorbing metamaterial adapted to various waves and inspired by carapace spiral structure of chafer |
| WO2023228368A1 (en) * | 2022-05-26 | 2023-11-30 | ソニーグループ株式会社 | Wave control medium, wave control element, wave control member, and wave control device |
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