CN106711617A - Plane lens for focusing and amplifying near magnetic field through adoption of magnet ring dipole - Google Patents
Plane lens for focusing and amplifying near magnetic field through adoption of magnet ring dipole Download PDFInfo
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- CN106711617A CN106711617A CN201710102836.6A CN201710102836A CN106711617A CN 106711617 A CN106711617 A CN 106711617A CN 201710102836 A CN201710102836 A CN 201710102836A CN 106711617 A CN106711617 A CN 106711617A
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- magnet ring
- spiral winding
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- medium substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention discloses a plane lens for focusing and amplifying a near magnetic field through adoption of a magnet ring dipole. The plane lens is formed by a magnet ring dipole unit array or a single magnet ring dipole unit, the magnet ring dipole unit comprises a dielectric substrate and two resonators having the same structure and symmetrically arranged at positive and negative sides of the dielectric substrate, the two resonators are in central symmetry about the dielectric substrate, and the resonators are formed by two spiral coils. The plane lens for focusing and amplifying the near magnetic field through adoption of the magnet ring dipole can substantially improve the wireless energy transmission efficiency between two antennas.
Description
Technical field
The present invention relates to wireless energy transfer field, and in particular to a kind of utilization magnet ring dipole is focused on and amplifies nearly magnetic field
Planar lens.
Background technology
Near field focus are always study hotspot in many fields, are applied to：(1) near field magnetic energy is wirelessly transferred, (2) medical science
Treatment, medical imaging.Pulsed magnetic field is strong, painless as medical research and clinical treatment field focus because of non-thermal effect, transmission power.
(3) high-resolution imaging.
Medical science magnetic hardware system is still in Physical Experiment stage, key issue：Nearly magnetic field diverging, field intensity not enough, with distance
Sharp-decay, such as medical imaging are treated, and target tissue intensity, depth are not enough, normal structure is damaged.Wireless power transfer increases with distance
Energy transmission efficiency is drastically reduced.Other fields there is also same problem.Question classification is evanescent wave in the near field of active antenna,
Increase sharp-decay, near field diverging out-focus with distance.It is easy to be combined into body from hundreds of MHz to ghz band emittance
The water of composition big absolutely absorbs, therefore radiation mode avoids using so far, from hundreds of kHz as in the frequency range that magnetic near field focus are used
To tens MHz frequency ranges, but the nearly magnetic field of low frequency focuses on many fields because there is huge commercial interest, such Magnetic Field Design
Seldom reported both at home and abroad with calculating.There is joule and radiation loss in above antenna array and near field plate focusing technology, allow evanescent waves
Short distance exponentially decays, and deteriorates efficiency.It is generally basede on antenna array and negative-magnetic-permeability meta-material lens focus amplifies evanescent wave, so
And joule and radiation loss can deteriorate efficiency.This patent is the new negative magnetoconductivity lens based on magnet ring dipole.
Annular resonance is proposed by Zel'dovich nineteen fifty-sevens first time in Atomic Physics, and is widely present in small to core
Son, atom, molecule and other elementary particles, greatly in the nature of astronomy neck.Annular resonance is produced by ring dipole.Ring idol
Extremely son is made up of end to end electric dipole or magnetic dipole.It is different from electric dipole and magnetic dipole, although ring dipole
It is also a kind of basic electromagnetic response, but the composition of ring dipole is complicated more than electric dipole and magnetic dipole.However,
Because the electromagnetic response of ring dipole is fainter, generally covered by electric dipole or magnetic dipole, therefore very long by one
The section time is all ignored by people.2010, Kaelberer et al. was opened by arranging four in the elementary cell of circular symmetric
Mouth resonant ring, and annular resonance is experimentally realized in microwave section, and it is separated with other multipoles, and in a certain frequency
Rate scope annular dipole moment is in leading position.
From now on, research ring shaped dipole electromagnetic property and its potential application have obtained a large amount of concerns.During this,
Many excellent configurations are suggested, and illustrate application value of the annular response in terms of electromagnetism, and quickly grow.
The content of the invention
For the shortcoming and deficiency that overcome prior art to exist, present invention offer is a kind of to be amplified using the focusing of magnet ring dipole
The planar lens in nearly magnetic field.
The present invention is adopted the following technical scheme that：
A kind of utilization magnet ring dipole focuses on the planar lens for amplifying nearly magnetic field, by magnet ring doublet unit array or single
Magnet ring doublet unit is constituted, and the magnet ring doublet unit includes medium substrate, and is symmetricly set on medium substrate positive and negative
Two structure identical resonators, two resonators are centrosymmetric on medium substrate, and the resonator is by two helixes
Circle is constituted.
The center of described two spiral windings is in same horizontal linear.
Described two spiral windings include the spiral winding in left side and the spiral winding on right side, specially：It is viewed from above,
, clockwise about the spiral winding in complete left side, its end is according to the spiral winding on the right side of counter clockwise direction winding for metal wire.
Adjacent wires spacing is 0.15 centimetre, 0.15 li of metal line width in left-hand helix circle and right side spiral winding
Rice.
The spiral winding is specially square spiral coil.
Be arranged on the positive resonator of medium substrate, the spiral winding number of turns on the left of it be arranged on medium substrate reverse side
The number of turns of the right side spiral winding of resonator is identical, spiral winding number of turns and the resonator for being arranged on medium substrate reverse side on the right side of it
Left-hand helix circle the number of turns it is identical, the winding direction of two resonators is identical, and adjustment number of turns poor | N-M | is capable of achieving Jie for bearing
Electric constant and magnetic conductivity, the N represent the spiral winding number of turns in the left side for being arranged on the positive resonator of medium substrate, right side
The number of turns of spiral winding is M.
Beneficial effects of the present invention：
1st, low-frequency small-sized planar structure, can be integrated, and low cost, making are simple；
2nd, focused on based on magnet ring dipole negative-magnetic-permeability meta-material and amplify nearly magnetic field, it is its gram to be different from traditional Meta Materials
Take joule radiation loss and extend evanescent field distance, mechanism is as follows：
I () due to mutual resonance coupling formation toroidal magnetic field mode of resonance between magnetic resonance, i.e. magnet ring dipole electromagnetic is humorous
Shake pattern, now electromagnetic field is limited in annular space, thus joule thermal losses is smaller, it is small to radiate, and solves joule and radiation
Loss problem；
(ii) electromagnetic field is confined to zonule, and more energy accumulations cause Q factor high in antenna near-field, so that
From a starting point decay higher, the magnetic near field of such system can extend more remote, solve evanescent field in the magnetic near field of antenna
Rapid decay problem；
(iii) dual amplification focusing function, one is that the magnetic resonance sub-resonance for constituting magnet ring dipole amplifies focusing, and two is negative
The intrinsic amplification of magnetic conductivity Meta Materials is focused on.Further enhance and focused on evanescent field.
Brief description of the drawings
Fig. 1 (a) is the structural representation of 4*4 magnet ring doublet unit arrays, and Fig. 1 (b) is its perspective view；
Fig. 2 is that a kind of utilization magnet ring dipole of the invention focuses on the planar lens structure top view for amplifying nearly magnetic field；
Fig. 3 is the perspective view of Fig. 2 of the present invention；
Fig. 4 (a), Fig. 4 (b) and Fig. 4 (c) are that magnetic field intensities of the invention, without Meta Materials and traditional negative magnetoconductivity lens are imitated
True figure.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As shown in Fig. 1 (a) and Fig. 1 (b), Fig. 2 and Fig. 3, a kind of utilization magnet ring dipole focuses on the plane for amplifying nearly magnetic field
Lens, are mainly used in therapeutic treatment, medical industries detection and magnetic wireless energy transfer, and it is by magnet ring doublet unit array or phase
Constituted with the single magnet ring doublet unit of size, the doublet unit includes medium substrate, and is symmetricly set on medium base
Two structure identical resonators of plate positive and negative.Two resonators are centrosymmetric on medium substrate, and the number of turns can be with identical
Can be with difference.Fig. 2 is the planar lens structural representation that magnet ring doublet unit array is constituted.
The resonator is made up of two spiral windings, respectively the spiral winding on the spiral winding in left side and right side, this
Square spiral coil is used in embodiment.It is positioned at the medium substrate specific winding method of positive resonator：A piece metal
Line wound clockwise N first encloses the coil to form left side, and then its end is further continued for enclosing to form the right side according to counter clockwise direction winding M
The spiral winding of side, that is to say, that in the coil in left side, terminal is in the coil on right side for the spiral winding starting point of resonator.
The central point of the coil on the left of it is with the central point of right side coil on same horizontal linear.It is viewed from above,
Winding direction and placement location positioned at medium substrate reverse side resonator is identical with positive, and specific difference is left side clockwise
Winding M circle, then right side then left distal end counterclockwise winding N circle.
Be arranged on the positive resonator of medium substrate, the spiral winding number of turns on the left of it be arranged on medium substrate reverse side
The number of turns of the right side spiral winding of resonator is identical, spiral winding number of turns and the resonator for being arranged on medium substrate reverse side on the right side of it
Left-hand helix circle the number of turns it is identical, the winding direction of two resonators is identical, and adjustment number of turns poor | N-M | is capable of achieving Jie for bearing
Electric constant and magnetic conductivity, the N represent the spiral winding number of turns in the left side for being arranged on the positive resonator of medium substrate, right side
The number of turns of spiral winding is M, and poor | the N-M | of the adjustment number of turns realizes negative dielectric constant and magnetic conductivity.
In the present embodiment, N=14, M=6 are taken, the periphery of its coil is long 18.2 centimetres, a width of 9.15 centimetres, phase in coil
Adjacent metal wire spacing is 0.15 centimetre, a width of 0.15 centimetre of metal wire.
The resonator is made up of the square spiral coil of two differential concatenations, and material aspect selects copper, chi of the invention
It is very little adjustable as the case may be, it is finally reached system resonance frequencies 13.57MHz.
Medium baseplate material uses FR-4 in the present embodiment, and dielectric constant is 4.3, and thickness is 1.2 millimeters, long 20 centimetres,
It is wide 20 centimetres.
In 13.57MHz, compared with kHz frequencies, resonance line length reduces working frequency of the present invention, and near field range is larger, and coupling is strong
Degree increases.To ensure that sense of current is consistent on wire during resonance, wire overall length l≤λ/2, λ=c/v, λ are the ripple of electromagnetic wave
Long, c is electromagnetic wave propagation speed, and f is the frequency of electromagnetic wave.Working frequency of the present invention in MHz, compared with kHz frequencies, resonance line length
Spend is its 1/1000.
What dimensions indicated above made utilizes magnet ring doublet unit for wireless energy transfer, shown in such as Fig. 4 (a), without super
Material and traditional negative magnetoconductivity lens emulation field are shown in Fig. 4 (b), Fig. 4 (c), are compared with showing.It can be seen that, magnet ring dipole energy
The efficiency that wireless energy is passed between highly significant two antennas of raising.
The present invention in limited substrate space, spiralization and by two spiral winding differential concatenations by way of increasing
Big equivalent inductance, uses the structure of rectangular coil to make full use of substrate space, effectively reduces resonant frequency.Meanwhile, reversely
The coil configuration of series connection not only ensures that the sense of current on two coils is consistent, more increases and produces the effective of magnet ring dipole
Size of current in conductor, so as to increase the intensity of magnet ring dipole, further improves wireless energy transfer radiation efficiency.Pass through
Emulate and be compared with the situation without Meta Materials and traditional negative magnetoconductivity lens, magnet ring dipole energy highly significant can be obtained and improve two
The efficiency of wireless energy transfer between antenna.
Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by the embodiment
Limitation, it is other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (6)
1. a kind of utilization magnet ring dipole focuses on the planar lens for amplifying nearly magnetic field, it is characterised in that the planar lens is by magnet ring
Doublet unit array or single magnet ring doublet unit are constituted, and the magnet ring doublet unit includes medium substrate, and symmetrically
Two structure identical resonators of medium substrate positive and negative are arranged on, two resonators are centrosymmetric on medium substrate,
The resonator is made up of two spiral windings.
2. planar lens according to claim 1, it is characterised in that the center of described two spiral windings is in same water
Flat line.
3. planar lens according to claim 1, it is characterised in that described two spiral windings include the helix in left side
Circle and the spiral winding on right side, specially：Viewed from above, metal wire clockwise about the spiral winding in complete left side, press by its end
According to the spiral winding on the right side of wrapped anti-clockwise.
4. planar lens according to claim 3, it is characterised in that in the spiral winding and right side spiral winding in left side
Adjacent wires spacing is 0.15 centimetre, 0.15 centimetre of metal line width.
5. planar lens according to claim 1, it is characterised in that the spiral winding is specially square spiral coil.
6. planar lens according to claim 3, it is characterised in that be arranged on the positive resonator of medium substrate, it is left
The spiral winding number of turns of side is identical with the number of turns of the right side spiral winding of the resonator for being arranged on medium substrate reverse side, its right side spiral shell
Rotation wire circle is identical with the number of turns of the left-hand helix circle of the resonator for being arranged on medium substrate reverse side, and two resonators are twined
Identical around direction, poor | the N-M | of the adjustment number of turns is capable of achieving negative dielectric constant and magnetic conductivity, and the N is represented and is arranged on medium substrate
The spiral winding number of turns in the left side of positive resonator, the number of turns of the spiral winding on right side is M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102836.6A CN106711617B (en) | 2017-02-24 | 2017-02-24 | Plane lens for focusing and amplifying near magnetic field by utilizing magnetic ring dipole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102836.6A CN106711617B (en) | 2017-02-24 | 2017-02-24 | Plane lens for focusing and amplifying near magnetic field by utilizing magnetic ring dipole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106711617A true CN106711617A (en) | 2017-05-24 |
| CN106711617B CN106711617B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710102836.6A Active CN106711617B (en) | 2017-02-24 | 2017-02-24 | Plane lens for focusing and amplifying near magnetic field by utilizing magnetic ring dipole |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0374915A (en) * | 1989-08-16 | 1991-03-29 | Murata Mfg Co Ltd | Dielectric resonator |
| JP2005260382A (en) * | 2004-03-09 | 2005-09-22 | Sony Corp | Dipole antenna |
| WO2011122162A1 (en) * | 2010-03-31 | 2011-10-06 | 株式会社村田製作所 | Composite antenna and composite wireless communication device |
| CN102683880A (en) * | 2012-04-28 | 2012-09-19 | 深圳光启创新技术有限公司 | Metamaterial and MRI (magnetic resonance imaging) magnetic signal enhancer |
| CN103367921A (en) * | 2012-03-31 | 2013-10-23 | 深圳光启创新技术有限公司 | Meta-material and MRI magnetic signal enhancement device |
| CN204044346U (en) * | 2014-08-26 | 2014-12-24 | 国家电网公司 | A kind of planar radio frequency coils for nuclear magnetic resonance |
| CN206834334U (en) * | 2017-02-24 | 2018-01-02 | 华南理工大学 | It is a kind of that the planar lens for amplifying nearly magnetic field is focused on using magnet ring dipole |
-
2017
- 2017-02-24 CN CN201710102836.6A patent/CN106711617B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0374915A (en) * | 1989-08-16 | 1991-03-29 | Murata Mfg Co Ltd | Dielectric resonator |
| JP2005260382A (en) * | 2004-03-09 | 2005-09-22 | Sony Corp | Dipole antenna |
| WO2011122162A1 (en) * | 2010-03-31 | 2011-10-06 | 株式会社村田製作所 | Composite antenna and composite wireless communication device |
| CN103367921A (en) * | 2012-03-31 | 2013-10-23 | 深圳光启创新技术有限公司 | Meta-material and MRI magnetic signal enhancement device |
| CN102683880A (en) * | 2012-04-28 | 2012-09-19 | 深圳光启创新技术有限公司 | Metamaterial and MRI (magnetic resonance imaging) magnetic signal enhancer |
| CN204044346U (en) * | 2014-08-26 | 2014-12-24 | 国家电网公司 | A kind of planar radio frequency coils for nuclear magnetic resonance |
| CN206834334U (en) * | 2017-02-24 | 2018-01-02 | 华南理工大学 | It is a kind of that the planar lens for amplifying nearly magnetic field is focused on using magnet ring dipole |
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| CN106711617B (en) | 2023-08-22 |
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