CN109802241A - Metamaterial unit, electromagnetic focusing amplifying lens and preparation method thereof - Google Patents
Metamaterial unit, electromagnetic focusing amplifying lens and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of metamaterial units, electromagnetic focusing amplifying lens and preparation method thereof, metamaterial unit, including medium substrate and resonance ring structure, resonance ring structure includes the derivative resonant ring of dual openings positioned at the first side of medium substrate and the microstrip line positioned at medium substrate second side, wherein, the derivative resonant ring of dual openings is inShape, including symmetrical first part and second part；Microstrip line derives the projection on resonant ring also cross the opening of first part and second part in dual openings, and is parallel to a side of medium base.Electromagnetic focusing amplifying lens includes multiple Meta Materials array structures in the fan-shaped distribution in space, wherein Meta Materials array structure includes multiple metamaterial units, and multiple metamaterial units are arranged in square array.Electromagnetic focusing amplifying lens of the invention can be such that the electromagnetic energy density in front of micro-strip RECTIFYING ANTENNA is obviously improved, and improve the working efficiency of micro-strip RECTIFYING ANTENNA system.
Description
Technical field
The invention belongs to microwave wireless energy transmission technology fields, and in particular to a kind of metamaterial unit, electromagnetic focusing are put
Big lens and preparation method thereof.
Background technique
Microwave wireless energy transmission technology is using microwave as energy carrier, by transmitting antenna and receiving antenna and attached
Circuit system realizes remote energy transmission, is a kind of settling mode of energy crisis.It is wireless with electromagnetic induction, magnetic resonance type etc.
Energy transmission technology is compared, and microwave wireless energy transmission technology can realize energy transmission, and its direction in larger distance
Property is preferable.
In microwave wireless energy transmission system, the most key part is exactly RECTIFYING ANTENNA part, and RECTIFYING ANTENNA is used for
It receives energy and is converted into easily stored direct current energy, the whole efficiency of entire microwave wireless energy transmission system is basic
It is determined by the performance of RECTIFYING ANTENNA.Because the advantages that micro-strip RECTIFYING ANTENNA is small in size, degree easy of integration is high, Yi Chengzhen, usually used
Receiving antenna of the micro-strip RECTIFYING ANTENNA as RECTIFYING ANTENNA, but the gain of micro-strip RECTIFYING ANTENNA is generally lower, therefore its work
Efficiency is not high.
Amplifying lens structure can effectively promote the gain of antenna, and can reinforce the directionality of microwave energy,
Certain lens systems are added in micro-strip RECTIFYING ANTENNA part, then can further promote its efficiency and transmission range.It is currently used
Amplifying lens structure is the primary lens of dragon, plating media lens and Meta Materials lens etc..Meta Materials lens compare other lenses structure
Have the advantages that small in size, easy of integration and Yi Chengzhen, and can directly be produced in batches by the technique of printed circuit board,
With the advantage for being difficult to substitute.Meta Materials refer to some structures with engineer and show not available for natural material
The composite material of extraordinary physical property, and these properties are mainly from artificial special construction.
But current Meta Materials lens are chiefly used in antenna house or resonance type wireless energy transmission system, are not used
In micro-strip RECTIFYING ANTENNA part, therefore the present invention devises a kind of metamaterial unit, electromagnetic focusing amplifying lens and its preparation side
Method.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides a kind of metamaterial units, electromagnetic focusing
Amplifying lens and preparation method thereof.The technical problem to be solved in the present invention is achieved through the following technical solutions:
The present invention provides a kind of metamaterial units for electromagnetic focusing amplifying lens, including medium substrate and resonant ring
Structure, the resonance ring structure include that the dual openings positioned at first side of medium substrate derive resonant ring and are located at the medium
The microstrip line of substrate second side, wherein
The dual openings derive resonant ringShape, including symmetrical first part and second part；
Projection of the microstrip line on the derivative resonant ring of the dual openings is also cross the first part and described the
The opening of two parts, and it is parallel to a side of the medium base.
In one embodiment of the invention, the opening of the first part and the opening of second part difference
It is provided with symmetrical first revers turn part and the second revers turn part；
Recess is respectively arranged on the side wall opposite with the opening of the first part and the second part；
In one embodiment of the invention, side length≤λ/4 of the metamaterial unit, wherein λ is desired electromagnetic wave
Wavelength.
In one embodiment of the invention, copper wire is made again for the derivative resonant ring of the dual openings and the microstrip line,
The copper line width is 0.5mm.
The present invention provides a kind of electromagnetic focusing amplifying lenses, including multiple Meta Materials arrays in the fan-shaped distribution in space
Structure, wherein
The Meta Materials array structure includes metamaterial unit described in any one of multiple above embodiments, multiple described
Metamaterial unit is arranged in square array.
In one embodiment of the invention, the space angle between the adjacent Meta Materials array structure is equal.
The present invention provides a kind of preparation methods of electromagnetic focusing amplifying lens, comprising:
According to the basic resonance ring of the frequency of desired electromagnetic wave and pre-selection, Meta Materials simulation unit is obtained；
According to the Meta Materials simulation unit, Meta Materials emulation array is obtained；
Array is emulated according to the Meta Materials, prepares the electromagnetic focusing amplifying lens.
In one embodiment of the invention, described according to the frequency of desired electromagnetic wave and the basic resonance ring of pre-selection, it obtains
To Meta Materials simulation unit, comprising:
Select the basic resonance ring as the initial resonant ring structure of the Meta Materials simulation unit；
Optimization is adjusted to the parameter of the basic resonance ring, obtains the derivative resonant ring of dual openings
According to the derivative resonant ring of the dual openings, the Meta Materials simulation unit is constituted.
In one embodiment of the invention, according to the Meta Materials simulation unit, Meta Materials emulation array, packet are obtained
It includes:
The Meta Materials simulation unit is subjected to array arrangement, obtains initially emulating array；
The distance between Meta Materials simulation unit described in the initial emulation array is adjusted, until the initial emulation battle array
Arranging has negative effective dielectric constant and negative equivalent permeability, obtains the Meta Materials emulation array.
In one embodiment of the invention, array is emulated according to the Meta Materials, it is saturating prepares the electromagnetic focusing amplification
Mirror, comprising:
Array is emulated according to the Meta Materials, Meta Materials array structure is prepared on selected medium substrate；
By several Meta Materials array structures in space arrangement, the electromagnetic focusing amplifying lens is formed.
Compared with prior art, the beneficial effects of the present invention are:
1, electromagnetic focusing amplifying lens of the invention can be such that the electromagnetic energy density in front of micro-strip RECTIFYING ANTENNA is shown
The promotion of work improves the working efficiency of micro-strip RECTIFYING ANTENNA system；
2, electromagnetic focusing amplifying lens of the invention can be realized as using existing conventional printed circuit boards manufacturing process, at
This is lower；
3, the connection type of electromagnetic lens of the invention and micro-strip ballast antenna can be rotated using the mechanical of simple and flexible
Structural union, so as to realize the function in control wireless energy transfer direction.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Fig. 1 is a kind of upper surface schematic diagram of metamaterial unit provided in an embodiment of the present invention；
Fig. 2 is a kind of lower surface schematic diagram of metamaterial unit provided in an embodiment of the present invention；
Fig. 3 is a kind of side schematic view of metamaterial unit provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of electromagnetic focusing amplifying lens provided in an embodiment of the present invention；
Fig. 5 is a kind of schematic diagram of Meta Materials array structure provided in an embodiment of the present invention；
Fig. 6 is that micro-strip RECTIFYING ANTENNA is being transmitted in the case where not using the electromagnetic focusing amplifying lens of the embodiment of the present invention
Space flux-density distribution figure at distance 60cm；
Fig. 7 is micro-strip RECTIFYING ANTENNA using the electromagnetic focusing amplifying lens of the embodiment of the present invention in transmission distance
From the space flux-density distribution figure at 60cm；
Fig. 8 is a kind of preparation method flow chart of electromagnetic focusing amplifying lens provided in an embodiment of the present invention；
Fig. 9 is a kind of schematic diagram of basic resonance ring provided in an embodiment of the present invention；
Figure 10 is a kind of schematic diagram of the second resonant ring for increasing recess provided in an embodiment of the present invention；
Figure 11 is a kind of schematic diagram of third resonant ring for increasing by the first revers turn part provided in an embodiment of the present invention；
Figure 12 is a kind of schematic diagram of the 4th resonant ring for increasing by the second revers turn part provided in an embodiment of the present invention.
Description of symbols
1- metamaterial unit；11- medium substrate；12- dual openings derive resonant ring；121- first part；122- second
Point；123- double back meander line structure；The first revers turn part of 1231-；The second revers turn part of 1232-；124- recess；13- microstrip line；2- is super
Material array structure；21- the first Meta Materials array structure；22- the second Meta Materials array structure；23- third Meta Materials array junctions
Structure；3- micro-strip RECTIFYING ANTENNA.
Specific embodiment
In order to which the present invention is further explained to reach the technical means and efficacy that predetermined goal of the invention is taken, below in conjunction with
The drawings and the specific embodiments, to a kind of electromagnetic focusing amplifying lens for micro-strip RECTIFYING ANTENNA proposed according to the present invention and
Its construction method is described in detail.
For the present invention aforementioned and other technology contents, feature and effect, in the specific embodiment party of following cooperation attached drawing
Formula can be clearly presented in being described in detail.By the explanation of specific embodiment, predetermined purpose institute can be reached to the present invention
The technical means and efficacy taken more understand deeply and specifically, however appended attached drawing be only to provide reference and description it
With, not be used to technical solution of the present invention is limited.
Referring to Figure 1 to Fig. 3, as shown, the metamaterial unit 1 for electromagnetic focusing amplifying lens of the present embodiment,
Including medium substrate 11 and resonance ring structure, the resonance ring structure includes that the dual openings positioned at 11 first side of medium substrate are derivative
Resonant ring 12 and microstrip line 13 positioned at 11 second side of medium substrate, Meta Materials refer to some structures with engineer and are in
Reveal the composite material of extraordinary physical property not available for natural material, and these properties are mainly from artificial special knot
Structure.
Specifically, referring to Figure 1, Fig. 1 is a kind of upper surface schematic diagram of metamaterial unit provided in an embodiment of the present invention,
As shown, the derivative resonant ring 12 of dual openings is inShape, including symmetrical first part 121 and second part 122；The
The opening of a part 121 and the opening of second part 122 are respectively arranged with symmetrical first revers turn part 1231 and the
Two revers turn parts 1232 form double back meander line structure 123；The side opposite with the opening of first part 121 and second part 122
Recess 124 is respectively arranged on wall.In the present embodiment, the size b of the derivative resonant ring 12 of dual openings is 9mm, first part
Spacing d between 121 and second part 122 is 0.5mm, and the derivative resonant ring 12 of dual openings is made of copper wire, and copper line width e is
0.5mm, the opening width f of the derivative resonant ring 12 of dual openings are 2mm, and the length j of the first revers turn part 1231 is 2mm, the second inflection
The length k in portion 1232 is 1.5mm, and the width g of recess 124 is 3mm, and depth i is 1mm.
The lower surface schematic diagram that 2, Fig. 2 is a kind of metamaterial unit provided in an embodiment of the present invention is referred to, as shown,
Projection of the microstrip line 13 on the derivative resonant ring 12 of dual openings also cross first part 121 and second part 122 opening,
And it is parallel to a side of medium substrate 11, the concave side wall of the projection and recess 124 is mutually perpendicular to, and intersection point is positioned at recessed
The midpoint of the concave side wall in portion 124.In the present embodiment, microstrip line 13 is made of copper wire, and copper line width e is 0.5mm.
The side schematic view that 3, Fig. 3 is a kind of metamaterial unit provided in an embodiment of the present invention is referred to, as shown,
In the present embodiment, medium substrate 11 is epoxy resin board, material rate FR-4, its mechanical performance with higher and dielectricity
Energy, preferable heat resistance and moisture resistivity simultaneously have good machining property, relative dielectric constant 4.3, and loss angle tangent is
0.025.The thickness h of medium substrate 11 is 3mm, because its too thick loss of the thickness of medium substrate 11 is higher, thickness too Bao Zengjia
Difficulty of processing, comprehensively considers drain performance and processing technology difficulty, and the optimal selection of compromise is 3mm.
Further, side length≤λ/4 of metamaterial unit 1, wherein λ is the wavelength of desired electromagnetic wave, because working as Meta Materials
When the size of unit 1 is more much smaller than the wavelength of the expectation electromagnetic wave, it is believed that charge inducing is approximately uniformly distributed in super
1 surrounding space of material cell can describe its electromagnetic signature with effective dielectric constant.In the present embodiment, the expectation electricity
The frequency of magnetic wave is 2.45GHz, wavelength c/f, and wherein c is the light velocity in vacuum, and f is the frequency of electromagnetic wave, Meta Materials list
The side length a of member 1 is 10mm.
The metamaterial unit 1 of the present embodiment has negative effective dielectric constant and negative equivalent permeability in 2.45GHz, can
To be applied to working frequency point in the micro-strip RECTIFYING ANTENNA system of 2.45GHz, the electromagnetic wave energy with 2.45GHz is existed
It propagates and focuses in metamaterial unit 1, according to other structures, will affect the effective dielectric constant of metamaterial unit 1 and equivalent
Magnetic conductivity, and then influence the performance of the present embodiment metamaterial unit 1.2.4GHz frequency is existing air electromagnetic signals wave band
In, using the mature extensive and lower frequency band of energy attenuation.
Fig. 4 is referred to, Fig. 4 is a kind of structural schematic diagram of electromagnetic focusing amplifying lens provided in an embodiment of the present invention, such as
Shown in figure, the electromagnetic focusing amplifying lens of the present embodiment includes multiple Meta Materials array structures 2 in the fan-shaped distribution in space,
In, Meta Materials array structure 2 includes the metamaterial unit 1 of any one of above embodiments, multiple 1 sides of being arranged in of metamaterial unit
Shape array, the square array refer to a metamaterial unit 1 of n (n > 2) according to certain line number, columns and adjacent Meta Materials
The array of spacing composition l*m between unit 1, wherein l, m are arbitrary integer, l*m=n.Further, adjacent Meta Materials battle array
Space angle between array structure 2 is equal.
In the electromagnetic focusing amplifying lens of the present embodiment, including three Meta Materials array structures 2, respectively the first surpass material
Expect array structure 21, the second Meta Materials array structure 22 and third Meta Materials array structure 23.Three Meta Materials array structures 2 are in
Fan-shaped array is in the front of micro-strip RECTIFYING ANTENNA 3, on the basis of the position of the second Meta Materials array structure 22, the first Meta Materials battle array
The space angle of array structure 21 and third Meta Materials array structure 23 and the second Meta Materials array structure 22 is 30 °, and micro-strip is whole
The working frequency of current antenna 3 is 2.45GHz.Fig. 5 is referred to, Fig. 5 is a kind of Meta Materials array junctions provided in an embodiment of the present invention
The schematic diagram of structure, as shown, in this embodiment, Meta Materials array structure 2 arranges squarely battle array by 5*5 metamaterial unit 1
The spacing of column, the derivative resonant ring 12 of two neighboring dual openings is 1mm.It is worth noting that, Meta Materials array structure 2 can be by more
A metamaterial unit 1 is constituted in the form of square array, forms of the Meta Materials array structure 2 of the electromagnetic focusing amplifying lens
Number can be that >=1 integer can be in the front of micro-strip RECTIFYING ANTENNA 3 when the number of Meta Materials array structure 2 is greater than 1
The arrangement of one row's sector structure can also be arranged in multiple rows of sector structure, the angular range of the sector structure according to the actual situation
It can be between -90 °~90 ° centered on micro-strip RECTIFYING ANTENNA 3.
The electromagnetic focusing amplifying lens of the present embodiment is mounted on the front of micro-strip RECTIFYING ANTENNA 3, so that micro-strip RECTIFYING ANTENNA 3
The electromagnetic energy density in front is obviously improved, to improve the working efficiency of micro-strip RECTIFYING ANTENNA system.
Fig. 6 and Fig. 7 are referred to, Fig. 6 and Fig. 7 are that micro-strip RECTIFYING ANTENNA is poly- in the electromagnetism for not using the embodiment of the present invention respectively
In the case where burnt amplifying lens with using the embodiment of the present invention electromagnetic focusing amplifying lens in the case where in transmission range
Space flux-density distribution figure at 60cm.As shown in fig. 6, when not using the electromagnetic focusing amplifying lens of the present embodiment, electricity
Magnetic energy propagates the case where presentation freely dissipates in space, decays larger, reaches the flat homomergic flow at micro-strip RECTIFYING ANTENNA 3
Density is 1.12VA/m2, energy-flux density refers within the scope of certain space, unit area can obtain or Unit Weight energy
The energy or power for certain energy that source can be generated are one of the main indicators for evaluating the energy, in electromagnetism, energy-flux density
Refer to the energy in certain unit time by the unit area vertical with the direction of propagation.As shown in fig. 7, by three Meta Materials arrays
The electromagnetic focusing amplifying lens of the present embodiment that structure 2 forms is placed in the front of micro-strip RECTIFYING ANTENNA 3, using the present embodiment
When electromagnetic focusing amplifying lens, there is focusing phenomenon at electromagnetic focusing amplifying lens rear in electromagnetic energy, this makes this
There is convergence in electromagnetic wave more to dissipate, and the average value of the energy-flux density at micro-strip RECTIFYING ANTENNA 3 is 3.4VA/m2.It can
To find out, after the electromagnetic focusing amplifying lens using the present embodiment, due to the good electromagnetic focusing of Meta Materials array structure 2
Characteristic, so that when electromagnetic focusing amplifying lens of the electromagnetic energy flow density at micro-strip RECTIFYING ANTENNA 3 by not using the present embodiment
1.12V·A/m23.4VA/m after being promoted to the electromagnetic focusing amplifying lens using the present embodiment2, realize three times or so
It is promoted, so that the working efficiency of micro-strip RECTIFYING ANTENNA system has significant raising.
It is worth noting that the present embodiment forms Meta Materials array structure 2 only with the metamaterial unit 1 of 5*5, and
The electromagnetic focusing amplifying lens for using only three Meta Materials array structures, 2 groups of cost implementations, if using greater number of
Metamaterial unit 1 constitutes Meta Materials array structure 2, and increases the quantity of Meta Materials array structure 2, then the electromagnetic focusing is put
The energy-flux density gain effect of big lens can further enhance, to further improve the work of micro-strip RECTIFYING ANTENNA system
Make efficiency.
The Meta Materials array structure 2 that the electromagnetic focusing amplifying lens of the present embodiment uses, with good electromagnetic focusing
Characteristic can make the electromagnetic energy flow density in 3 front of micro-strip RECTIFYING ANTENNA be obviously improved, to improve micro-strip rectification day
The working efficiency of linear system system.
Fig. 8 is referred to, Fig. 8 is a kind of preparation method process of electromagnetic focusing amplifying lens provided in an embodiment of the present invention
Figure, as shown, the construction method of the electromagnetic focusing amplifying lens of the present embodiment, comprising:
S1: according to the basic resonance ring of the frequency of desired electromagnetic wave and pre-selection, Meta Materials simulation unit is obtained；
S2: according to the Meta Materials simulation unit, Meta Materials emulation array is obtained；
S3: array is emulated according to the Meta Materials, prepares the electromagnetic focusing amplifying lens.
Specifically, in the present embodiment using CST (3 D electromagnetic field simulation software) or HFSS (high-frequency structure emulation) electricity
Magnetic simulation software carries out modeling and simulating, in simulation process, the boundary condition of setting are as follows: up-and-down boundary is desired electrical wall, left and right
Boundary is ideal magnetic wall, and front and back boundary is open space, and driving source simulates the occurring source of electromagnetic wave, its frequency, which is arranged, is
2.45GHz, 2.4GHz frequency are in existing air electromagnetic signals wave band, using the mature extensive and lower frequency of energy attenuation
The working frequency point of the application of the electromagnetic focusing amplifying lens of wave band and the present embodiment.
Further, the S1, comprising:
S11: select the basic resonance ring as the initial resonant ring structure of the Meta Materials simulation unit；
Fig. 9 is referred to, Fig. 9 is a kind of schematic diagram of basic resonance ring provided in an embodiment of the present invention, the basic resonance
Ring is inShape, specifically, the material selection epoxy resin board of medium substrate, grade FR-4, thickness is selected as 3mm.
S12: being adjusted optimization to the parameter of the basic resonance ring, obtains the derivative resonant ring of dual openings；
S13: according to the derivative resonant ring of the dual openings, the Meta Materials simulation unit is constituted.
Specifically, the first step determines the size of the initial resonant ring structure, first according to the frequency of the expectation electromagnetic wave
Rate determines the size range of the initial resonant ring structure.Since in effective dielectric constant theory, the size of structure must be remote
Less than the wavelength of the expectation electromagnetic wave, in the present embodiment, the electromagnetic wave that the expectation electromagnetic wave is 2.45GHz, wavelength
For c/f, wherein c is the light velocity in vacuum, and f is the frequency of electromagnetic wave, and the wavelength that 2.45GHz electromagnetic wave is calculated is
0.1224m, therefore select the size range of the initial resonant ring structure for the range of 1/5~1/20 wavelength, i.e. 5mm~
20mm。
Secondly, by the initial resonant ring structure, according to the size range since 5mm every 1mm until 20mm is drawn
Be divided into 16 groups, it emulated respectively in cst software, obtain 16 groups described in initial resonant ring structure S parameter.Wherein, S
Parameter refers to scattering parameter, is an important parameter in microwave transmission, for assessing the reflection signal and biography of tested equipment
The performance for the number of delivering letters.
Again, the S parameter of initial resonant ring structure described in determining each group, mutate Frequency point, selection near
That group of the nearly expectation wave frequency, using its corresponding size as the size of the initial resonant ring structure.Specifically
Ground, the Frequency point that S parameter mutates mean that, in this Frequency point, left hand characteristic probably occurs in this structure.In classics
In electrodynamics, the electromagnetic property of medium can be described with two macroparameters of permittivity ε and magnetic permeability μ, in nature
The two parameters of substance are generally all related with frequency, and they are all positive number in the case where the overwhelming majority.For dielectric
Constant ε and magnetic permeability μ are the conventional medium of positive number, and electromagnetism wave energy is propagated wherein, and propagation constant k depends on the dielectric of medium
Constant ε and magnetic permeability μ are closed meeting right-handed helix in conventional medium between electric field strength E, magnetic field strength H and propagation vector k
System, i.e., conventional medium have right hand characteristic.
If permittivity ε and magnetic permeability μ are negative, electromagnetic wave can also be propagated wherein, but electric field strength E, magnetic
Meeting left hand helix relationship between field intensity H and propagation vector k, i.e., this medium has left hand characteristic, and with left hand characteristic
Substance generally pass through it is artificial synthesized be fabricated, that is, Meta Materials in embodiments of the present invention, and pass through building Meta Materials
To obtain the amplifying lens with electromagnetic focusing function.
In the present embodiment, as shown in figure 9, S parameter generates mutation when the size b of the basic resonance ring is 9mm
Frequency point near 2.45GHz, therefore selecting the size b of the basic resonance ring is 9mm, and the side length a of medium substrate is
The side length of 10mm i.e. the Meta Materials simulation unit.
Second step determines the resonance ring structure of the Meta Materials simulation unit, and the Meta Materials that the first step determines are emulated
The size and structure of unit, S parameter generate the Frequency point i.e. resonant frequency point of mutation, exist centainly with 2.45GHz
Deviation mainly optimizes adjustment to the structural parameters of the basic resonance ring so to optimize to its structure.
Firstly, the structure of the basic resonance ring is constant, using different copper line width e, respectively 1mm and 0.5mm into
Row emulation, obtains two groups of S parameters, uses recurrence formula to the basic resonance ring in MATLAB obtain two groups of S parameters
Effective dielectric constant and equivalent permeability carry out backstepping, recurrence formula is as follows:
Wherein, n is the equivalent refractive index of structure；Z is the impedance of structure；K is electromagnetic wave wave number；D is dielectric substrate thickness；
S11 and S21 is the data in S parameter, and S11 is input reflection coefficient, S21 positive transmission coefficients.
Effective dielectric constant ε=nz, equivalent permeability μ=n/z calculate in MATLAB according to above-mentioned formula, energy
Access the effective dielectric constant and equivalent permeability of the basic resonance ring.It is obtained by interpretation of result, copper line width e is
When 0.5mm, the basic resonance ring obtains left hand characteristic in 2~3GHz, but distance 2.45GHz still has relatively large deviation.
Secondly, as shown in Figure 10, increasing separately depth on the opposite side wall of two openings of the basic resonance ring is
I, width are the recess of g, form the second resonant ring, imitate using the width g of the recess and depth i as variable
Very, analysis is as a result, it has been found that the width g for promoting the recess can move back the frequency that the S parameter of second resonant ring mutates
Rate point, and the mutation amplitude enhancing of S parameter, S parameter mutation mean that a left side probably occur in this Frequency point
The amplitude of hand characteristic, the mutation amplitude enhancing of S parameter, the dielectric constant and refractive index that indicate the structure can be more preferable, and refractive index
Amplitude is higher, illustrates that it is stronger to refraction of electromagnetic wave effect, that is, focusing effect is more preferable.And increase the depth of the recess
I can then move forward the Frequency point that the second resonant ring S parameter mutates, but not change the amplitude of S parameter mutation.Instead
It is multiple that the value of the width g and depth i of the recess are tested, regardless of value, it can not all make second resonant ring
S parameter mutation Frequency point adjust to 2.45GHz.
Again, consider to introduce new variables, discovery, which increases the opening width f, can equally move back S parameter mutation
Frequency point, the Frequency point for enabling to the S parameter of second resonant ring to mutate after being adjusted to f are 2.45GHz,
But backstepping, obtained effective dielectric constant are carried out by effective dielectric constant and equivalent permeability of the recurrence formula to the structure
It is worth amplitude to reduce, this illustrates that the left hand characteristic of the structure becomes unobvious.
Finally, as shown in figure 11, introducing the first revers turn part in the opening, the length is j, form third resonant ring,
It was found that promoting the value of the first revers turn part length j, it is able to ascend the effective dielectric constant amplitude of the third resonance ring structure, still
The Frequency point that its S parameter mutates can move forward.At this point, the property of total can be made if being further added by the value of the opening width f
It can deteriorate.As shown in figure 12, therefore on the basis of the first revers turn part the second revers turn part, the length of the second revers turn part are further introduced into
Degree is k, forms the 4th resonant ring, and first revers turn part and second revers turn part form double back meander line structure.
After each parameter to the 4th resonant ring adjusts optimization, the derivative resonant ring of the dual openings is obtained,
Opening width f is 2mm, and the width g of the recess is 3mm, and depth i is 1mm, and the length j of first revers turn part is 2mm,
The length k of second revers turn part is 1.5mm, this structure realizes the Frequency point of S parameter mutation in 2.45GHz, and S
Parameter is larger in the frequency point mutation amplitude, to S parameter carry out backstepping be calculated negative effective dielectric constant with bear it is equivalent
Magnetic permeability value, numerical value is more satisfactory, resonant ring of the derivative resonant ring of the dual openings as the Meta Materials simulation unit
Structure constitutes the Meta Materials simulation unit.
Further, the S2, comprising:
S21: the Meta Materials simulation unit is subjected to array arrangement, obtains initially emulating array；
S22: the distance between Meta Materials simulation unit described in the adjustment initial emulation array, until described initial imitative
True array has negative effective dielectric constant and negative equivalent permeability, obtains the Meta Materials emulation array.
Specifically, it is described initial to emulate the humorous of array after the Meta Materials simulation unit forms the initial emulation array
Vibration frequency point is likely to occur offset, needs to be adjusted the spacing between the Meta Materials simulation unit, then respectively to having
The initial emulation array of different spacing carries out the effective dielectric constant and negative equivalent magnetic that emulation backstepping is preferably born
Conductivity value, to obtain Meta Materials emulation array, so that the resonant frequency point of Meta Materials emulation array is in 2.45GHz,
The application working frequency of the namely described electromagnetic focusing amplifying lens.
Further, the S3, comprising:
S31: array is emulated according to the Meta Materials, Meta Materials array structure is prepared on selected medium substrate；
Specifically, by printed-board technology, the Meta Materials that copper wire arrangement is printed out on epoxy resin board are imitative
True array obtains the Meta Materials array structure.Using existing conventional printed circuit boards manufacturing process, technical maturity, cost
It is lower.
S32: by several Meta Materials array structures in space arrangement, the electromagnetic focusing amplifying lens is formed.
Specifically, space of the Meta Materials array structure in front of micro-strip RECTIFYING ANTENNA is fan-shaped arranged evenly, is formed
The electromagnetic focusing amplifying lens, the space angle between the adjacent Meta Materials array structure are equal.Adjacent is described super
Spacing between material array structure adjust according to the actual situation it is moderate, because if spacing between the Meta Materials array structure
Relatively close, according to geometric operation, micro-strip RECTIFYING ANTENNA described in the focal length of Voice segment too far, is unfavorable for installation and energy
Also there can be Divergent Phenomenon, have no idea to focus more electromagnetic waves, influence the working efficiency of the electromagnetic focusing amplifying lens；
If spacing is farther out between the Meta Materials array structure, since electromagnetic wave is mainly gathered near central axes, the array of two sides
The electromagnetic wave power density of convergence is lower, is unfavorable for the electromagnetic focusing amplifying lens and receives electromagnetic wave, and the array of two sides
Deviation angle is excessive, and received electromagnetic wave energy is less, and the electromagnetic focusing amplifying lens is bad to the gain effect of electromagnetic wave.
It is worth noting that can be used to improve the electromagnetic focusing amplifying lens to the gain effect of electromagnetic wave
Multiple Meta Materials array structures arrange in the front of the micro-strip RECTIFYING ANTENNA in row's sector structure, or are in multiple rows of fan
Shape structural arrangement can also be arranged in hemispherical dome structure in front of the micro-strip RECTIFYING ANTENNA.
In the present embodiment, the electromagnetic focusing amplifying lens can be realized whole with the micro-strip using mechanical means
Spatial position distribution and space angle between current antenna, or rectified using the mechanical system and the micro-strip with rotational structure
Antenna formation is rotatably connected, to realize the function in control wireless energy transfer direction.
The above content is combine specifically preferred embodiment further detailed description of the invention, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of metamaterial unit (1) for electromagnetic focusing amplifying lens, which is characterized in that including medium substrate (11) harmony
Shake ring structure, the resonance ring structure include positioned at (11) first side of medium substrate dual openings derivative resonant ring (12) and
Positioned at the microstrip line (13) of the medium substrate (11) second side, wherein
The dual openings derive resonant ring (12)Shape, including symmetrical first part (121) and second part
(122)；
Projection of the microstrip line (13) on the dual openings derivative resonant ring (12) is also cross the first part (121)
With the opening of the second part (122), and it is parallel to a side of the medium substrate (11).
2. metamaterial unit (1) according to claim 1, which is characterized in that the opening of the first part (121) and
The opening of the second part (122) is respectively arranged with symmetrical first revers turn part (1231) and the second revers turn part
(1232)；
It is respectively arranged on the side wall opposite with the opening of the first part (121) and the second part (122) recessed
Into portion (124).
3. metamaterial unit (1) according to claim 1, which is characterized in that side length≤λ of the metamaterial unit (1)/
4, wherein λ is the wavelength of desired electromagnetic wave.
4. metamaterial unit (1) according to claim 1, which is characterized in that the dual openings derivative resonant ring (12) and
The microstrip line (13) is made of copper wire, and the width of the copper wire is 0.5mm.
5. a kind of electromagnetic focusing amplifying lens, which is characterized in that including multiple Meta Materials array junctions in the fan-shaped distribution in space
Structure (2), wherein
The Meta Materials array structure (2) includes multiple metamaterial units according to any one of claim 1 to 4 (1),
Multiple metamaterial units (1) are arranged in square array.
6. electromagnetic focusing amplifying lens according to claim 5, which is characterized in that the adjacent Meta Materials array structure
(2) space angle between is equal.
7. a kind of preparation method of electromagnetic focusing amplifying lens characterized by comprising
According to the basic resonance ring of the frequency of desired electromagnetic wave and pre-selection, Meta Materials simulation unit is obtained；
According to the Meta Materials simulation unit, Meta Materials emulation array is obtained；
Array is emulated according to the Meta Materials, prepares the electromagnetic focusing amplifying lens.
8. the method according to the description of claim 7 is characterized in that according to the basic resonance of the frequency of desired electromagnetic wave and pre-selection
Ring obtains Meta Materials simulation unit, comprising:
Select the basic resonance ring as the initial resonant ring structure of the Meta Materials simulation unit；
Optimization is adjusted to the parameter of the basic resonance ring, obtains the derivative resonant ring of dual openings；
According to the derivative resonant ring of the dual openings, the Meta Materials simulation unit is constituted.
9. the method according to the description of claim 7 is characterized in that it is imitative to obtain Meta Materials according to the Meta Materials simulation unit
True array, comprising:
The Meta Materials simulation unit is subjected to array arrangement, obtains initially emulating array；
The distance between Meta Materials simulation unit described in the initial emulation array is adjusted, until the initial emulation array tool
There are negative effective dielectric constant and negative equivalent permeability, obtains the Meta Materials emulation array.
10. preparing the electromagnetism the method according to the description of claim 7 is characterized in that emulating array according to the Meta Materials
Focus amplifying lens, comprising:
Array is emulated according to the Meta Materials, Meta Materials array structure is prepared on selected medium substrate；
By several Meta Materials array structures in space arrangement, the electromagnetic focusing amplifying lens is formed.
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| CN113394566A (en) * | 2021-05-28 | 2021-09-14 | 哈尔滨工业大学 | All-metal metamaterial lens based on near-field convergence function and phase shift amount design method thereof |
| CN116979235A (en) * | 2023-07-07 | 2023-10-31 | 苏州城市学院 | Electromagnetic energy flow control device in waveguide |
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