CN107257035A - Six insensitive frequency band Meta Materials wave-absorbers of a kind of microwave band polarization - Google Patents
Six insensitive frequency band Meta Materials wave-absorbers of a kind of microwave band polarization Download PDFInfo
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- CN107257035A CN107257035A CN201710614936.7A CN201710614936A CN107257035A CN 107257035 A CN107257035 A CN 107257035A CN 201710614936 A CN201710614936 A CN 201710614936A CN 107257035 A CN107257035 A CN 107257035A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
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Abstract
Polarize six insensitive frequency band Meta Materials wave-absorbers the present invention relates to a kind of microwave band.The Meta Materials wave-absorber is made up of top layer resonant element, medium substrate and metal base plate, and top layer resonant element and metal base plate are fitted in the upper and lower surface of medium substrate respectively.Top layer resonant element is symmetrically placed in above and below medium substrate by four, the identical multimode Ω shape resonators on four sides of left and right are constituted, and described multimode Ω shapes resonator can show multiple different absworption peaks under horizontal polarization and vertical polarization.The Meta Materials wave-absorber that the present invention is provided has high suction ripple rate, and polarize insensitive characteristic, and has six wave absorbed crest value points, with very high engineering application value.
Description
Technical field
The present invention relates to Meta Materials wave-absorber, more particularly to the band Meta Materials wave-absorber of one kind six, belong to artificial electromagnetic material
Field.
Background technology
Artificial electromagnetic Meta Materials are a kind of novel artificial composites, and it has negative magnetic permeability and negative equivalent dielectric normal
Several extraordinary physical characteristics.Using this physical characteristic, the device of operation wavelength can be far smaller than with design structure size.Compare
In common dielectric material, the characteristics of this material has that thickness of thin, size are small, is easily integrated.
2008, artificial electromagnetic Meta Materials were incorporated into wave-absorber field by Landy et al. first, and real at single frequency point
The perfect absorption of electromagnetic wave is showed.This wave-absorber (i.e. Meta Materials wave-absorber) made based on artificial electromagnetic Meta Materials is breached
The limitation of traditional wave absorbing device quarter-wave thickness, and can reach the absorptivity of almost Perfect, with traditional wave absorbing device without
The advantage of method analogy.A kind of new design method is provided for the design of wave absorbing device, to realizing wave-absorber " thin, light, wide, strong "
Developing goal has great impetus.Its physical dimension is small, thickness of thin, high-selenium corn, the characteristics of be easily integrated, it is military,
It is with a wide range of applications in terms of communication, sensing, electromagnetic compatibility.
With the fast development of modern technologies, electromagnetic environment is more and more complicated, and the electromagnetic wave absorption body of single frequency band can not
Meet the requirement of system rejection to disturbance.Therefore, how to realize the electromagnetic absorption of multiband, reduce the interference to system, be one urgently
To be solved the problem of.Meta Materials wave-absorber proposed by the present invention realizes the efficient absorption of up to six frequency bands in 2-17GHz, and
And also there is the insensitive characteristic that polarizes, therefore with very high engineering application value.
The content of the invention
Few the invention aims to solve traditional Meta Materials wave-absorber absorption band, absorption efficiency is low, and to incidence
The problem of polarization of ele orientation-sensitive there is provided it is a kind of based on multimode resonator work in microwave band have polarize it is unwise
Feel six frequency band Meta Materials wave-absorbers of characteristic.
To solve the above problems, a kind of microwave band designed by the present invention polarizes, six insensitive frequency band Meta Materials inhale ripple
Body, including at least 100 inhaled ripple unit in the square of periodic arrangement, inhale ripple unit be top layer resonant element, medium substrate,
" sandwich " structure of metal base plate composition.The upper surface of top layer resonant element and medium substrate is affixed, metal floor and medium
The lower surface of substrate is affixed.The geometric center of top layer resonant element is overlapped with the geometric center of medium substrate, and metal base plate is complete
The lower surface of overwrite media substrate.
The top layer resonant element has four identical multimode Ω shape resonators, four multimode Ω shape resonator quilts
Left and right, the upper and lower four direction of medium substrate upper surface is individually positioned in, preferably medium is arranged in mirror image
There is gap between any two in the left and right of upper surface of substrate and up and down four sides, multimode Ω shape resonators；Four multimode Ω shape resonators
The outline of the top layer resonant element of composition is square, and with left and right, the plane of symmetry up and down and diagonally.Multimode Ω
Shape resonator can show multiple different absworption peaks under horizontal polarization and vertical polarization.
Further, described multimode Ω shapes resonator 2 can be looked at as split ring resonator and be opened along split ring resonator
The adjutage that mouth both sides horizontal edge extends to both sides is constituted.
Further, described multimode Ω shape resonators exist between gap, therefore multimode Ω shape resonators between any two
Electromagnetic response will not influence each other, and the split ring resonator opening direction outwardly.
Further, the material of described top layer resonant element and metal base plate is metallic copper, and its thickness have to be larger than
The skin depth of electromagnetic wave.
Further technical scheme is：Described media substrate materials are necessary for lossy dielectric material.
It is using the beneficial effect of above-mentioned technical proposal：
1st, the top layer of Meta Materials wave-absorber is using four identical resonators, and make it have level, it is vertical and along right
The plane of symmetry of linea angulata, can make wave-absorber have the insensitive characteristic that polarizes；
2nd, four multimode Ω shape resonators are arranged in the left and right of medium substrate, four side up and down, and resonance can be inspired simultaneously
The vertical polarization response and horizontal polarization response of device so that wave-absorber has six absworption peaks, and all has the suction of almost Perfect
Receive；
3rd, the material of the materials'use metallic copper and medium substrate of top layer resonant element and metal base plate is lossy dielectric material
Material, can make resonant element that EMR electromagnetic resonance occur under the driving of electromagnetic wave with metal base plate, and electromagnetic wave has been dissipated in into consumption
In medium.
4th, the opening for the multimode Ω shape resonators that the present invention is used outwardly, can cause four resonators to be easily integrated, subtract
Junior unit area.
Brief description of the drawings
Fig. 1 is six three dimensional structure diagrams with wave-absorber proposed by the present invention based on four multimode Ω shape resonators；
Fig. 2 (a) is multimode Ω shapes resonator structure schematic diagram proposed by the present invention；
Fig. 2 (b) is the six cellular construction signals with wave-absorber proposed by the present invention based on four multimode Ω shape resonators
Figure；
Fig. 2 (c) is the six cellular construction side views with wave-absorber proposed by the present invention based on four multimode Ω shape resonators
Figure；
Fig. 3 is the six band wave-absorber normal incidence absorption curve maps proposed by the present invention based on four multimode Ω shape resonators；
Fig. 4 for it is proposed by the present invention based on four multimode Ω shape resonators six with wave-absorber under different polarisation angles
Absorb spectrogram；
In figure：1st, absorptive unit；2nd, multimode Ω shapes resonator；
1-1 top layer resonant elements；1-2, medium substrate；1-3, metal base plate；
2-1, the first multimode Ω shape resonators；2-2, the second multimode Ω shape resonators；2-3, the 3rd multimode Ω shape resonators；
The multimode Ω shape resonators of 2-4 the 4th；
2A, split ring resonator；2B, adjutage.
Embodiment
In order to which the object, technical solutions and advantages of the present invention are better described, below in conjunction with embodiment to this hair
It is bright to make specific description in further detail.
As shown in figure 1, the six band wave-absorbers proposed by the present invention based on four multimode Ω shape resonators are in same plane
The periodicity matrix arrangement of multiple absorptive units 1 composition, the repetition number of the cyclic extension on horizontal and vertical of absorptive unit 1
It is identical, and the unit number repeated is individual no less than 100 (10 × 10), the unit number repeated in the present embodiment be 100 (10 ×
10) it is individual.
It is square to inhale the outline of ripple unit 1, is by top layer resonant element 1-1, middle medium substrate 1-2 and bottom
Metal base plate 1-3 composition " sandwich " structure.Top layer resonant element 1-1 and medium substrate 1-2 upper surface are affixed, metal
Floor 1-3 and medium substrate 1-2 lower surface are affixed.Top layer resonant element 1-1 geometric center and medium substrate 1-2 geometry
Medium substrate 1-2 lower surface is completely covered in center superposition, metal base plate 1-3.
In the present embodiment, top layer resonant element 1-1 is made up of four identical multimode Ω shapes resonators 2.Multimode Ω
The adjutage 2B groups that shape resonator 2 extends from middle split ring resonator 2A and along split ring resonator 2A opening edge to both sides
Into.
As shown in Fig. 2 (a), multimode Ω shapes resonator 2 is made up of the line of three kinds of different line widths, its split shed both sides horizontal edge
Width is identical, and the line width of two adjutages is identical with the line width of opening both sides horizontal edge, and the length of adjutage is determined jointly by L and L2
It is fixed.Its geometrical structure parameter is as shown in table 1.
As shown in a parts in Fig. 3, when multimode Ω shapes resonator 2 is placed vertically, in the situation of electromagnetic wave normal incidence
Under, with four absworption peaks；As shown in the b parts in Fig. 3, during multimode Ω shape 2 horizontal positioneds of resonator, in the same terms
Under, with three absworption peaks.
In four multimode Ω shape resonators of the present embodiment, the first multimode Ω shape resonator 2-1 and the 3rd multimode Ω shapes are humorous
The device 2-3 speculars that shake are placed on medium substrate 1-2 the right and left, the second multimode Ω shape resonator 2-2 and the 4th multimode Ω
Shape resonator 2-4 speculars are placed on medium substrate 1-2 both sides up and down.Between multimode Ω shapes resonator 2 exists between any two
Gap s=0.5mm.
As shown in Fig. 2 (b), the resonant element 1-1 finally synthesized outline is square, and its length of side is L=18mm, tool
There are left and right, the plane of symmetry up and down and diagonally.
In the present embodiment, medium substrate 1-2 uses glass fabric of epoxy resin plate, and it is a kind of lossy dielectric material,
Specifically electromagnetic parameter is：Permittivity εr=4.3, magnetic permeability μr=1, loss tangent angle is 0.025.Medium substrate 1-2 has two
Individual effect：First effect is separation top layer resonant element 1-1 and metal floor 1-3, is allowed them in incident electromagnetic wave
Driving is lower to occur EMR electromagnetic resonance；Second is that electromagnetic wave energy is converted into heat energy using the dissipation characteristic of medium.Such as Fig. 2 (b)
With Fig. 2 (c) Suo Shi, the length of side of medium substrate is P=20mm, and thickness is h=1mm.
In the present embodiment, top layer resonant element 1-1 and metal base plate 1-3 use thickness for t=0.035mm metal coppers
Make, its electrical conductivity is σ=5.8 × 107S/m.Metal base plate 1-3 is covered in medium substrate 1-2 lower surface, its area coverage with
Medium substrate 1-2 floor space is identical.
Six absorptivities with wave-absorber based on four multimode Ω shape resonators described in the present embodiment are defined as A=1-R-
T=1- | S11|2-|S21|2, R is reflectivity in formula, and T is transmissivity.Reflectivity R is defined as | S11|2, transmissivity T is defined as | S21
|2.In order that absorptivity is maximized, it is desirable to small as far as possible in whole frequency range reflected waves and transmitted wave.Present invention design
The back side of suction ripple unit 1 be metal base plate 1-3, electromagnetic wave can not be passed through, therefore absorptivity calculation formula can be reduced to A=1- |
S11|2。
Simulation result of the present embodiment under electromagnetic wave normal incidence is as shown in Fig. 3 c parts, and the simulation result is by finite element
Method is calculated and obtained.In figure, abscissa is frequency, and ordinate is absorptivity.It can be seen that there is 6 in 2-17GHz
Obvious absworption peak.This six absworption peaks are in 3.95GHz, 6.61GHz, 9.17GHz, 11.22GHz, 12.59GHz, 15.63GHz
The absorptivity at place is respectively 97.04%, 99.57%, 99.54%, 98.95%, 99.94% and 99.49%, and average absorption
Rate is up to 99%.This illustrates that wave-absorber proposed by the present invention has reached the absorption of almost Perfect on six frequencies.Pass through contrast
Fig. 3 (a), Fig. 3 (b) and Fig. 3 (c) absorb frequency it can be found that six suctions with wave-absorber based on four multimode Ω shape resonators
The superposition that peak is absworption peak when being placed by single multimode Ω shapes resonator in horizontal positioned and vertically is received, wherein the 6th absorption
Peak (P6) is formed by stacking by two absworption peaks (M4 and N3).
Absorption spectrogram of the present embodiment under different polarisation angles is as shown in Figure 4.The polarisation angles are defined as electric field
The angle of vector and vertical direction, it is constant that electromagnetic wave wave vector still remains perpendicular to wave-absorber absorbing surface.In figure, abscissa is pole
Change angle, excursion is 0~90 °；Ordinate is frequency, and indication range is 2-17GHz.It can be seen that proposed by the present invention inhale
Ripple body under different polarisation angles there is identical to absorb response curve, and it is good that this illustrates that wave-absorber proposed by the present invention is shown
The good insensitive characteristic of polarization.
It can be seen that, the Meta Materials wave-absorber that the present invention is provided has high suction ripple rate, and polarize insensitive characteristic, and has six suctions
Crest value point, with very high engineering application value.
The invention is not limited in above-mentioned embodiment, if the various changes or deformation to invention do not depart from the present invention's
Spirit and scope, it is if these are changed and deformation belongs within the scope of the claim and equivalent technologies of the present invention, then of the invention
It is also intended to comprising these changes and deforms.
Claims (10)
- The six insensitive frequency band Meta Materials wave-absorbers 1. a kind of microwave band polarizes, the wave-absorber is existed by suction ripple unit (1) The array structure of cyclic extension formation on x, y direction；It is characterized in that：The outline for inhaling ripple unit (1) is square, It is by top layer resonant element (1-1), middle medium substrate (1-2) and " sandwich " knot of the metal base plate 1-3 compositions of bottom Structure；The top layer resonant element (1-1) has four identical multimode Ω shapes resonators (2-1,2-2,2-3,2-4), four Individual multimode Ω shapes resonator (2-1,2-2,2-3,2-4) is separately placed the left and right, upper and lower of medium substrate (1-2) upper surface Four direction, the outline of the top layer resonant element (1) combined is square, the center of top layer resonant element (1) and Jie The center superposition of matter substrate (1-2)；Four multimode Ω shape resonators are not in contact with each other, and there is gap between any two.
- The six insensitive frequency band Meta Materials wave-absorbers 2. microwave band according to claim 1 polarizes, it is characterised in that：Institute It is the adjutage (2B) extended from split ring resonator (2A) and along opening both sides horizontal edge to both sides to state multimode Ω shapes resonator (2) The structure of composition, the opening of the split ring resonator (2A) is outwardly；Four multimode Ω shapes resonators (2-1,2-2,2-3,2-4) are in Up and down, left and right mirror image is arranged.
- The six insensitive frequency band Meta Materials wave-absorbers 3. microwave band according to claim 1 polarizes, it is characterised in that：Institute When the multimode Ω shapes resonator (2) stated is arranged vertically, in the case of electromagnetic wave normal incidence, with four absworption peaks；Multimode Ω When shape resonator (2) is horizontally disposed, under above-mentioned the same terms, with three absworption peaks.
- The six insensitive frequency band Meta Materials wave-absorbers 4. microwave band according to claim 1 polarizes, it is characterised in that：It is many There is gap s=0.5mm between any two in mould Ω shapes resonator (2).
- The six insensitive frequency band Meta Materials wave-absorbers 5. the microwave band according to any one of claim 1-4 polarizes, its It is characterised by：The length of side of the top layer resonant element (1-1) is L=18mm, and less than medium substrate (1-2) length of side, it is fitted In medium substrate (1-2) upper surface, and geometric center is overlapped with the geometric center of medium substrate (1-2).
- The six insensitive frequency band Meta Materials wave-absorbers 6. the microwave band according to any one of claim 1-4 polarizes, its It is characterised by：The material of the medium substrate (1-2) is lossy dielectric material.
- The six insensitive frequency band Meta Materials wave-absorbers 7. the microwave band according to any one of claim 1-4 polarizes, its It is characterised by：The medium substrate (1-2) selects permittivity εr=4.3, magnetic permeability μr=1, loss tangent angle is 0.025 Glass fabric of epoxy resin plate, the structural parameters of the medium substrate (1-2) are：Length of side P=20mm, thickness h=1mm.
- The six insensitive frequency band Meta Materials wave-absorbers 8. the microwave band according to any one of claim 1-4 polarizes, its It is characterised by：The metal base plate (1-3) is fitted in medium substrate (1-2) lower surface, fitting area and medium substrate completely The lower surface area equation of (1-2).
- The six insensitive frequency band Meta Materials wave-absorbers 9. the microwave band according to any one of claim 1-4 polarizes, its It is characterised by：The thickness of the top layer resonant element (1-1) and metal floor (1-3) have to be larger than the skin depth of electromagnetic wave, What is selected is the metallic copper that thickness is t=0.035mm, and electrical conductivity is σ=5.8 × 107S/m。
- The six insensitive frequency band Meta Materials wave-absorbers 10. the microwave band according to any one of claim 1-4 polarizes, its It is characterised by：The array number for inhaling ripple unit (1) is no less than 10 × 10.
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Cited By (9)
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|---|---|---|---|---|
| CN108645872A (en) * | 2018-07-31 | 2018-10-12 | 西南大学 | A kind of edible oil type microwave detection system based on super surface texture |
| CN108761588A (en) * | 2018-04-09 | 2018-11-06 | 北京邮电大学 | A kind of insensitive Meta Materials wave absorbing device of infrared multiband polarization |
| CN109361067A (en) * | 2018-12-03 | 2019-02-19 | 南京信息工程大学 | A kind of polarization converter turning 90 degrees any direction polarization of ele partially |
| CN112054309A (en) * | 2020-09-02 | 2020-12-08 | 中国航空工业集团公司西安飞行自动控制研究所 | Multi-frequency-band electromagnetic wave absorption structure and method |
| CN112134027A (en) * | 2020-09-25 | 2020-12-25 | 合肥工业大学 | Metamaterial wave-absorbing device formed on basis of mutual intersection of three-dimensional resonance rings |
| JP2021508998A (en) * | 2017-12-29 | 2021-03-11 | クアンチー カッティング エッジ テクノロジー リミテッドＫｕａｎｇ−Ｃｈｉ Ｃｕｔｔｉｎｇ Ｅｄｇｅ Ｔｅｃｈｎｏｌｏｇｙ Ｌｔｄ． | Controllable wave absorption metamaterial |
| CN113314837A (en) * | 2021-05-31 | 2021-08-27 | 湖南汽车工程职业学院 | Polarization insensitive WIFI frequency band electromagnetic energy collection surface |
| CN113811173A (en) * | 2021-09-29 | 2021-12-17 | 联想(北京)有限公司 | Electromagnetic shielding mechanism and electronic equipment |
| CN114144053A (en) * | 2021-12-20 | 2022-03-04 | 重庆邮电大学 | Composite wave absorber with dual dynamic regulation and control functions and preparation method and application thereof |
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| CN108761588A (en) * | 2018-04-09 | 2018-11-06 | 北京邮电大学 | A kind of insensitive Meta Materials wave absorbing device of infrared multiband polarization |
| CN108645872A (en) * | 2018-07-31 | 2018-10-12 | 西南大学 | A kind of edible oil type microwave detection system based on super surface texture |
| CN109361067A (en) * | 2018-12-03 | 2019-02-19 | 南京信息工程大学 | A kind of polarization converter turning 90 degrees any direction polarization of ele partially |
| CN109361067B (en) * | 2018-12-03 | 2023-09-01 | 南京信息工程大学 | Polarization converter for deflecting electromagnetic wave polarization in any direction by 90 degrees |
| CN112054309A (en) * | 2020-09-02 | 2020-12-08 | 中国航空工业集团公司西安飞行自动控制研究所 | Multi-frequency-band electromagnetic wave absorption structure and method |
| CN112054309B (en) * | 2020-09-02 | 2023-05-23 | 中国航空工业集团公司西安飞行自动控制研究所 | Multi-band electromagnetic wave absorption structure and absorption method |
| CN112134027B (en) * | 2020-09-25 | 2022-06-10 | 合肥工业大学 | Metamaterial wave-absorbing device formed on basis of mutual intersection of three-dimensional resonance rings |
| CN112134027A (en) * | 2020-09-25 | 2020-12-25 | 合肥工业大学 | Metamaterial wave-absorbing device formed on basis of mutual intersection of three-dimensional resonance rings |
| CN113314837A (en) * | 2021-05-31 | 2021-08-27 | 湖南汽车工程职业学院 | Polarization insensitive WIFI frequency band electromagnetic energy collection surface |
| CN113314837B (en) * | 2021-05-31 | 2024-02-23 | 湖南汽车工程职业学院 | Polarization-insensitive WIFI frequency band electromagnetic energy collection surface |
| CN113811173A (en) * | 2021-09-29 | 2021-12-17 | 联想(北京)有限公司 | Electromagnetic shielding mechanism and electronic equipment |
| CN114144053A (en) * | 2021-12-20 | 2022-03-04 | 重庆邮电大学 | Composite wave absorber with dual dynamic regulation and control functions and preparation method and application thereof |
| CN114144053B (en) * | 2021-12-20 | 2024-04-12 | 重庆邮电大学 | Composite wave absorber with dual dynamic regulation and control and preparation method and application thereof |
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