CN208622948U - A kind of controllable absorbing meta-material - Google Patents
A kind of controllable absorbing meta-material Download PDFInfo
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- CN208622948U CN208622948U CN201721900005.5U CN201721900005U CN208622948U CN 208622948 U CN208622948 U CN 208622948U CN 201721900005 U CN201721900005 U CN 201721900005U CN 208622948 U CN208622948 U CN 208622948U
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Abstract
The utility model discloses a kind of controllable absorbing meta-materials, comprising: substrate and metamaterial unit array layer；Conductive geometric units include: the first engraved structure, the second engraved structure and conductive geometry each of on metamaterial unit array layer；Wherein, four vertex of the first engraved structure have each extended over the second engraved structure, and are provided with conductive geometry between every two adjacent second engraved structure；And each second engraved structure includes the second end towards the first end at the center of conductive geometric units and backwards to the center of conductive geometric units, the varactor connecting with the conductive geometry on both sides is equipped at the first end of second engraved structure, the fixed capacity being intervally installed and fixed resistance are equipped at the second end of second engraved structure, and fixed capacity and one side the connection of conductive geometry and fixed resistance and the conductive geometry of another side connect.The utility model can be realized the active adjusting for inhaling wave frequency section, and power consumption is extremely low.
Description
Technical field
The utility model relates to Material Fields, it particularly relates to a kind of controllable absorbing meta-material.
Background technique
Meta Materials are a kind of special type composite material or structure, by setting to carrying out ordered structure in material key physical size
Meter makes it obtain the extraordinary physical property that conventional material does not have.By the basic material composition, the periodic unit that design Meta Materials
Shape and arrangement mode can obtain corresponding resonance characteristic as needed.In addition, Meta Materials also pass through impedance matching and decaying
Characteristic realizes that the absorption to radar wave, the impedance matching with external environment can make incident electromagnetic wave in the anti-of Meta Materials surface
It penetrates minimum and enters inside Meta Materials as much as possible, while keeping the electromagnetic wave entered in Meta Materials fast by efficient attenuation characteristic
Speed decaying.
In addition, can effectively eliminate the radar cross section (RCS) of target using absorbing meta-material, applied at present
Absorbing material be research passive, that academia has had some scholars to carry out active controllable absorbing material, for example, existing
Scheme disclosed in technology is led to by generating an absorption peak in microwave section using semicircle and triangle shape composite micro-structure
It crosses the insertion variable capacitance between semicircle and triangle and realizes the electricity regulation for absorbing peak position.But the currently existing scheme is
Microwave Absorption Properties only to one polarization effectively, to another polarize it is no it is adjustable inhale wave effect.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Utility model content
For the problems in the relevant technologies, the utility model proposes a kind of controllable absorbing meta-materials, by Meta Materials
Resistance and varactor are introduced in structure, it is several by rationally designing the conduction in conductive geometric units and conductive geometric units
Connection mode between what structure is realized to change the absorption frequency range of Meta Materials by the change of applied voltage and inhales wave frequency
The active of section is adjusted.
The technical solution of the utility model is achieved in that
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of controllable absorbing meta-material is constructed, it should
Controllable absorbing meta-material includes: substrate；Metamaterial unit array layer, metamaterial unit array layer are disposed on the substrate, Meta Materials
Cell array layer includes the conductive geometric units of multiple periodic arrangements, wherein each conduction geometric units include: the first hollow out knot
Structure, the second engraved structure and conductive geometry；Wherein, four vertex of the first engraved structure have each extended over the second hollow out knot
Structure, and conductive geometry is provided between every two adjacent second engraved structure；And each second engraved structure packet
Include the second end towards the first end at the center of conductive geometric units and backwards to the center of conductive geometric units, the second hollow out knot
It is equipped with the varactor connecting with the conductive geometry on both sides at the first end of structure, is set at the second end of the second engraved structure
There is the connection of the conductive geometry on the fixed capacity being intervally installed and fixed resistance and fixed capacity and one side, and
Fixed resistance and the conductive geometry of another side connect.
One embodiment according to the present utility model is provided with metal material between fixed capacity and fixed resistance, and
Metal material is in contact with fixed capacity and fixed resistance respectively.
One embodiment according to the present utility model, fixed capacity and fixed resistance are arranged in series by metal material, and
And varactor with connect after fixed capacity and fixed resistance be arranged in parallel.
One embodiment according to the present utility model, the shape of conductive geometry are the central axes point along octagon
The half of octagon after cutting.
One embodiment according to the present utility model, opposite two conductive geometries are about across conductive geometric units
Center central axes it is symmetrical.
One embodiment according to the present utility model, the first engraved structure include: two metal lines, and the two of every metal line
End contacted respectively with the conductive geometry being oppositely arranged, and a metal line in substrate be equipped with bending section, in addition one
The top of bending section is arranged in metal wire, so that two metal lines do not contact.
One embodiment according to the present utility model, two metal lines are projected as cross structure.
The side of one embodiment according to the present utility model, the second engraved structure is connected to the first engraved structure, and second engraves
The other side of hollow structure is connected to third engraved structure.
One embodiment according to the present utility model, substrate include: reflecting layer；Honeycomb layer, honeycomb layer setting
Above reflecting layer.
One embodiment according to the present utility model, further includes: wave transparent protective layer, wave transparent protective layer are arranged in Meta Materials list
On element array layer.
The advantageous effects of the utility model are:
The utility model in metamaterial structure by introducing resistance and varactor, by rationally designing conductive geometry
The connection mode between conductive geometry in unit and conductive geometric units, to be changed by the change of applied voltage
Become the absorption frequency range of Meta Materials, realizes that the active for inhaling wave frequency section is adjusted, and the power consumption pole that the controllable suction wave of the utility model surpasses
It is low, it almost can be ignored, well solved the power consumption defect of electrically controllable absorbing material.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the schematic diagram according to the section of the controllable absorbing meta-material of the utility model embodiment；
Fig. 2 is the structural schematic diagram according to the conductive geometric units of the utility model embodiment；
Fig. 3 is the schematic diagram of the metamaterial unit array layer after the voltage-drop loading according to the utility model embodiment；
Fig. 4 is the wave-absorbing effect of the controllable absorbing meta-material according to corresponding to the different capacitors of the utility model embodiment
Schematic diagram；
Fig. 5 is to be illustrated according to the controllable absorbing meta-material of the utility model embodiment to the wave-absorbing effect of two polarized waves
Figure.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained, all belongs to
In the range of the utility model protection.
Fig. 1 and Fig. 2 are please referred to, the utility model provides a kind of controllable absorbing meta-material, which includes:
Substrate；Metamaterial unit array layer (2), metamaterial unit array layer (2) are disposed on the substrate, metamaterial unit array layer (2)
Conductive geometric units including multiple periodic arrangements, wherein each conduction geometric units include: the first engraved structure (27), the
Two engraved structures (28) and conductive geometry (21)；Wherein, four vertex of the first engraved structure (27) have each extended over
Two engraved structures (28), and conductive geometry (21) are provided between every two adjacent second engraved structure (28)；With
And each second engraved structure (28) includes towards the first end at the center of conductive geometric units and backwards to conductive geometric units
Center second end, the change connecting with the conductive geometry (21) on both sides is equipped at the first end of the second engraved structure (28)
Hold diode (24), the fixed capacity (23) being intervally installed and fixed electricity are equipped at the second end of the second engraved structure (28)
Resistance (22) and fixed capacity (23) are connect with the conductive geometry (21) on one side and fixed resistance (22) and another side
Conductive geometry (21) connection.
With the aid of the technical scheme, by introducing resistance and varactor in metamaterial structure, by rationally setting
The connection mode between the conductive geometry in conductive geometric units and conductive geometric units is counted, to pass through applied voltage
Change realize that the active for inhaling wave frequency section is adjusted to change the absorption frequency ranges of Meta Materials, and the controllable suction wave of the utility model
Super power consumption is extremely low, almost can be ignored, and has well solved the power consumption defect of electrically controllable absorbing material.
In order to preferably describe the technical solution of the utility model, detailed retouch is carried out below by specific embodiment
It states.
With continued reference to Fig. 1, which can be divided into 4 layers, and along the incident direction of electromagnetic wave, this controllably inhales wave
Meta Materials are followed successively by wave transparent protective layer (1), metamaterial unit array layer (2), honeycomb layer (3), reflecting layer from top to bottom
(4), wherein the honeycomb layer (3) and reflecting layer (4) constitute substrate.In addition, wave transparent protective layer (1) with a thickness of d1, surpass
Material cell array layer (2) with a thickness of d2, honeycomb layer (3) with a thickness of d3, reflecting layer (4) with a thickness of d4, meanwhile,
Those skilled in the art can the thickness d 1 to wave transparent protective layer (1), the thickness of metamaterial unit array layer (2) according to actual needs
The thickness d 3 of d2, honeycomb layer (3) are spent, the thickness d 4 of reflecting layer (4) is configured, for example, according to the present utility model one
A embodiment, the thickness d 2 with a thickness of 0.8mm, metamaterial unit array layer (2) of wave transparent protective layer (1) are 0.04mm, honeycomb
The thickness d 3 of structure sheaf (3) is 7mm, and the thickness d 4 of reflecting layer (4) is 0.1mm, and the utility model is not construed as limiting this.
It is made of in addition, though Fig. 1 shows the substrate honeycomb layer (3) and reflecting layer (4), it can also basis
Actual demand is configured, for example, one embodiment according to the present utility model, can could alternatively be honeycomb layer (3)
PMI (polymethacrylimide, Polymethacrylimide) layer or PVC (Polyvinyl chloride, polychlorostyrene second
Alkene) layer, the utility model do not limit this.Meanwhile the material in the reflecting layer (4) can also be selected according to actual needs,
Carbon fiber or metal film can be selected in the material of another embodiment according to the present utility model, the reflecting layer (4), this is practical new
Type does not limit this.
In addition, as shown in figure 3, the metamaterial unit array layer (2) is by multiple conductive geometric units weeks as shown in Figure 2
Phase rearranges, and the shape of the conduction geometric units can be configured according to actual needs, for example, according to the present utility model one
The shape of a embodiment, the conduction geometric units is square, and the utility model is not construed as limiting this.For ease of description, under
Face is illustrated so that the conductive geometric units in Fig. 2 are square as an example.
In addition, the conduction geometric units include: the first engraved structure (27), in the first engraved structure with continued reference to Fig. 2
(27) four vertex have each extended over the second engraved structure (28), to include four the second hollow outs in the conduction geometric units
Structure (28), and four second engraved structures (28) are separately positioned on around the first engraved structure (27).Meanwhile every
Conductive geometry (21) are additionally provided between two the second engraved structures (28), the shape of the conduction geometry (21) is edge
The half after the central axes segmentation octagon of octagon, and opposite two conductive geometries (21) are about passing through
The central axes at the center of conductive geometric units are symmetrical, it will be appreciated, however, by one skilled in the art that in metamaterial unit array
In the conduction geometry (21) shape it is practical be exactly octagon, be intended merely to describe the side of conductive geometric units here
Just, each octagon is separated along center, it is divided into two 1/2 octagons, adheres to 2 adjacent units separately.Meanwhile often
A second engraved structure (28) is other than two faces contacted with conductive geometry (21), also towards the conduction geometry
The first end of unit center and the backwards second end at the conduction geometric units center, wherein in each second engraved structure (28)
First end be equipped with a varactor (24) connecting with the conductive geometry (21) on both sides, and engraved each second
The second end of hollow structure (28) is equipped with the fixed resistance (22) being intervally installed and fixed capacity (23) and fixed capacity
(23) it connect with the conductive geometry (21) on one side, and is additionally provided between fixed resistance (22) and fixed capacity (23)
Metal material (30), and the metal material (30) is in contact with fixed resistance (22) and fixed capacity (23) respectively, so that this is solid
Determine resistance (22) and fixed capacity (23) to be arranged in series by the metal material (30), consolidating after varactor (24) and series connection
Determine resistance (22) and fixed capacity (23) is arranged in parallel, and then circuit is allowed to be not turned on, thus the function of wave-absorber in practical applications
Consumption almost can be ignored, and well solve the power consumption defect of controllable absorbing meta-material.
In addition, with continued reference to Fig. 2, the first engraved structure (27) further include: metal wire (25) and metal wire (26), every gold
The both ends for belonging to line are contacted with the conductive geometry (21) being oppositely arranged respectively, meanwhile, in order to avoid horizontal and vertical two sides
To metal connecting line intersection, metal wire (25) can be run through substrate, and be bent at the back side of substrate, thus the metal wire
(25) it is equipped with bending section, meanwhile, the top of bending section is arranged in metal wire (26), to spatially do dislocation processing, guarantees
Metal wire (25) and metal wire (26) do not contact, meanwhile, metal wire (25) and metal wire (26) are projected as cross structure.This
Outside, it as shown in Fig. 2, the blank parts in the conduction geometric units are hollow out, here for convenience, further defines
Third engraved structure (29), the third engraved structure (29) are connected to the side of the second engraved structure (28), while this second is engraved
The other side of hollow structure (28) is connected to the first engraved structure (27), thus pass through the presence of third engraved structure, it can be by the conduction
Geometric units are regarded as a square, in addition, those skilled in the art can of course be by the second engraved structure (28) and third hollow out
Structure (29) regards second engraved structure (28) as.In addition, of course it is to be understood that the material of the conduction geometric units can basis
Actual demand is selected, for example, one embodiment according to the present utility model, the material of the artificial conductive geometry (21)
For gold, silver, copper, the utility model is not construed as limiting this.
To which by above-mentioned arrangement, which includes: 4 conductive geometries (21), 4 fixed resistances
(22), 4 fixed capacities (23), 4 varactors (24), transverse metal line (25) and longitudinal metal line (26), should
Fixed resistance (22), fixed capacity (23), varactor (24) load between two adjacent conductive geometries (21),
Then wherein fixed resistance (22) and fixed capacity (23) loaded in series are loaded with varactor (24) parallel connection.
In addition, the side length of the conduction geometric units is a, the opposite both sides of conductive geometry (21) with continued reference to Fig. 2
Distance is b, and the side length of the second engraved structure (28) is s, and the width of the second engraved structure (28) is g, metal wire (25) or metal
The width of line 26 is w, and the resistance value of fixed resistance (22) is Res0, and the capacitance of fixed capacity (23) is C0, varactor
(24) capacitance is Cap.In addition, of course it is to be understood that the parameters value in conductive geometric units can be according to actual needs
It is configured.For example, one embodiment according to the present utility model, the side length a of the conduction geometric units is 30mm, conductive geometry
The distance on the opposite both sides of structure (21) is 18.2mm, and the side length of the second engraved structure (28) is 7.5mm, the second engraved structure
(28) width is 3mm, and the width of metal wire (25) or metal wire 26 is 1mm, and the resistance value of fixed resistance (22) is 500 Ω,
The capacitance of fixed capacity (23) is 1pF, and the capacitance of varactor (24) is 1pF~16pF.
In addition, with continued reference to Fig. 3, the metamaterial unit array being made of multiple conductive geometric units periodic arrangements leads to
The adjacent two sides on-load voltage in the metamaterial unit array is crossed, the active of absorption frequency range can be realized by changing applied voltage
It adjusts, and the power consumption of wave-absorber is extremely low, almost can be ignored.
In order to better illustrate the utility model controllable absorbing meta-material technical effect, implement below by specific
Example is illustrated.
| Parameter | Value |
| d1 | 0.8mm |
| d2 | 0.04mm |
| d3 | 7mm |
| d4 | 0.1mm |
| a | 30mm |
| b | 18.2mm |
| s | 7.5mm |
| g | 3mm |
| w | 1mm |
| Res0 | 500Ω |
| C0 | 1pF |
| Cap | 1~16pF |
Table 1
Firstly, the value of the structure size of controllable absorbing meta-material, resistance and capacitor is as listed in Table 1, load surpasses material at this
The applied voltage of material unit array layer (2) changes to 28V from 1V, and the corresponding capacitor of varactor (24) is about changed to from 16pF
1pF, controllable absorbing meta-material absorption peak corresponding under different capacitors are as shown in Figure 4.It can be seen from figure 4 that capacitor from
16pF changes to 1pF, corresponding absorption peak increases to 1.72GHz from 0.46GHz, 3.74 times of the change in location of absorption peak, horizontal
Across P~L-band.In addition, those skilled in the art should be appreciated that it is one embodiment, changing structure size, selection difference
The varactor (24) of capacitance variations range, can adjusting in P~Ku band limits by absorption peak, cover current application
Most of detection radar service band.
Secondly, Fig. 5 is that conductive geometric units are corresponding to TE wave (horizontal polarized wave) and TM wave (vertically polarized wave) polarization
Wave-absorbing effect, the capacitor of corresponding varactor (24) are 1pF.From fig. 5, it is seen that the reflectivity under two polarization is bent
Line is almost overlapped, and illustrates that the controllable absorbing meta-material of the low-power consumption of the utility model is that polarization is insensitive.
In addition, in the present embodiment, the overall thickness of controllable absorbing meta-material is 7.94mm, and 0.46GHz absorption peak is corresponding
Wavelength is 652mm, so that the thickness of the Meta Materials is only the 1/82 of wavelength, 1/4 far smaller than traditional wavelength absorbent structure, into
And splendid ultra-slim features are shown, the consumption and weight of material can be greatly reduced in actual use.
In conclusion by means of the above-mentioned technical proposal of the utility model, by rationally design conductive geometric units and
The connection mode between conductive geometry in conductive geometric units may be implemented below the utility model has the advantages that outer by changing
Making alive changes the absorption frequency range of Meta Materials, realizes that the active for inhaling wave frequency section is adjusted；The controllable adjustable suction baud of absorbing meta-material
Property is identical to two polarized effects；The controllable absorbing meta-material has excellent ultra-thin microwave absorbing property；The controllable super material of suction wave
The power consumption of material is extremely low, almost can be ignored, and has well solved the power consumption defect of electrically controllable absorbing material.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (8)
1. a kind of controllable absorbing meta-material characterized by comprising
Substrate；
Metamaterial unit array layer, the metamaterial unit array layer are arranged on the substrate, the metamaterial unit array
Layer includes the conductive geometric units of multiple periodic arrangements, wherein each conductive geometric units include: the first engraved structure,
Second engraved structure and conductive geometry；
Wherein, the shape of the conductive geometry is one of the octagon after the central axes segmentation along octagon
Half, the conductive geometry of opposite two is symmetrical about the central axes at the center for passing through the conductive geometric units；
Wherein, four vertex of first engraved structure have each extended over second engraved structure, and every two is adjacent
Second engraved structure between be provided with the conductive geometry；And
Each second engraved structure includes to lead towards the first end at the center of the conductive geometric units and backwards to described
The second end at the center of electric geometric units is equipped with the conductive geometry knot with both sides at the first end of second engraved structure
The varactor of structure connection, the fixed capacity and fixation being intervally installed are equipped at the second end of second engraved structure
The conductive geometry connection on resistance and the fixed capacity and one side and the fixed resistance and another side
The conduction geometry connection.
2. controllable absorbing meta-material according to claim 1, which is characterized in that in the fixed capacity and the fixed electricity
Metal material is provided between resistance, and the metal material is in contact with the fixed capacity and the fixed resistance respectively.
3. controllable absorbing meta-material according to claim 2, which is characterized in that the fixed capacity and the fixed resistance
Be arranged in series by the metal material, and the varactor with connect after the fixed capacity and the fixed electricity
Resistance is arranged in parallel.
4. controllable absorbing meta-material according to claim 1, which is characterized in that first engraved structure includes:
Two metal lines, the both ends of every metal wire are contacted with the conductive geometry being oppositely arranged respectively, and
One metal wire is equipped with bending section in the substrate, and in addition the upper of the bending section is arranged in a metal wire
Side, so that two metal wires do not contact.
5. controllable absorbing meta-material according to claim 4, which is characterized in that two metal wires are projected as cross
Structure.
6. controllable absorbing meta-material according to claim 1, which is characterized in that the side of second engraved structure is connected to
The other side of first engraved structure, second engraved structure is connected to third engraved structure.
7. controllable absorbing meta-material according to claim 1, which is characterized in that the substrate includes:
Reflecting layer；
Honeycomb layer, the honeycomb layer are arranged above the reflecting layer.
8. controllable absorbing meta-material according to claim 1, which is characterized in that further include:
Wave transparent protective layer, the wave transparent protective layer are arranged on the metamaterial unit array layer.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802243A (en) * | 2019-03-29 | 2019-05-24 | 北京环境特性研究所 | A kind of active-passive compatible composite radar absorber based on AFSS |
| CN109994838A (en) * | 2017-12-29 | 2019-07-09 | 深圳光启尖端技术有限责任公司 | A kind of controllable absorbing meta-material |
| CN111029788A (en) * | 2019-12-11 | 2020-04-17 | 中国电子科技集团公司第十四研究所 | Broadband metamaterial wave-absorbing structure with angle and polarization insensitivity |
| CN116864995A (en) * | 2023-08-04 | 2023-10-10 | 中南大学 | Diode loading two-layer active metamaterial frequency division band adjustable wave absorbing structure |
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2017
- 2017-12-29 CN CN201721900005.5U patent/CN208622948U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109994838A (en) * | 2017-12-29 | 2019-07-09 | 深圳光启尖端技术有限责任公司 | A kind of controllable absorbing meta-material |
| CN109802243A (en) * | 2019-03-29 | 2019-05-24 | 北京环境特性研究所 | A kind of active-passive compatible composite radar absorber based on AFSS |
| CN109802243B (en) * | 2019-03-29 | 2021-08-24 | 北京环境特性研究所 | Active and passive compatible composite radar absorber based on AFSS |
| CN111029788A (en) * | 2019-12-11 | 2020-04-17 | 中国电子科技集团公司第十四研究所 | Broadband metamaterial wave-absorbing structure with angle and polarization insensitivity |
| CN116864995A (en) * | 2023-08-04 | 2023-10-10 | 中南大学 | Diode loading two-layer active metamaterial frequency division band adjustable wave absorbing structure |
| CN116864995B (en) * | 2023-08-04 | 2023-12-22 | 中南大学 | Diode loading two-layer active metamaterial frequency division band adjustable wave absorbing structure |
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