CN102683872A - Metamaterial having negative magnetic permeability and magnetic resonance imaging (MRI) magnetic signal enhancement device - Google Patents
Metamaterial having negative magnetic permeability and magnetic resonance imaging (MRI) magnetic signal enhancement device Download PDFInfo
- Publication number
- CN102683872A CN102683872A CN2012101100559A CN201210110055A CN102683872A CN 102683872 A CN102683872 A CN 102683872A CN 2012101100559 A CN2012101100559 A CN 2012101100559A CN 201210110055 A CN201210110055 A CN 201210110055A CN 102683872 A CN102683872 A CN 102683872A
- Authority
- CN
- China
- Prior art keywords
- ultra material
- artificial micro
- artificial
- structural
- negative magnetoconductivity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention provides a metamaterial having negative magnetic permeability and a magnetic resonance imaging (MRI) magnetic signal enhancement device. The metamaterial comprises at least one layer of metamaterials having the negative magnetic permeability, the layer of metamaterials comprises a substrate, a plurality of first artificial micro-structures and a plurality of second artificial micro-structures, wherein the plurality of first artificial micro-structures and the plurality of second artificial micro-structures are periodically arranged at two sides of the substrate in an array mode, each of the first artificial micro-structures consists of four first artificial micro-structure units which are arranged in an annular array, each of the second artificial micro-structures consists of four second artificial micro-structure units which are arranged in an annular array, the first artificial micro-structure units and the second artificial micro-structure units are in an opening resonance loop structure, an opening of the opening resonance loop structure is at a corner, positions of the second artificial micro-structure units and positions of the first artificial micro-structure units are in a one-to-one correspondence mode, and the first artificial micro-structure units rotate around geometric centers of annular arrays by 180 DEG to form a shape which is the same as that of the second artificial micro-structure units. The metamaterial and the device can effectively reduce harmonic frequency of the metamaterial. Besides, the device has a wide application range.
Description
[technical field]
The present invention relates to ultra field of materials, relate to ultra material of a kind of negative magnetoconductivity and MRI magnetic signal enhance device particularly.
[background technology]
At present, international community is to the existing a large amount of research in magnetic permeability aspect, and wherein the research for positive magnetic permeability has been tending towards ripe; Research for the ultra material of negative magnetoconductivity is the focus of studying both at home and abroad now, and negative magnetoconductivity has the quantum polarization, can produce polarization to incident wave; Therefore sphere of action is very big, and like the mr imaging technique in the medical imaging field, negative magnetic-inductive capacity material can be strengthened electromagnetic imaging effect; Negative magnetic-inductive capacity material is also playing an important role aspect the lens research in addition; In the engineering field, magnetic permeability all is meant relative permeability usually, is the absolute permeability μ and the magnetic constant μ of material
0The ratio of (claiming permeability of vacuum again), μ
r=μ/μ
0, dimensionless number.Usually " relatively " two words and symbol subscript r are removed.Magnetic permeability is to represent that material receives magnetizing field H and does the time spent, and inner true magnetic field is with respect to the degree of increase (μ＞1) or the minimizing (μ＜1) of H.So far in the already present material of finding of nature, μ is greater than 0.
The principle of nulcear magnetic resonance (NMR) (MRI) imaging system is to utilize coil to remove to detect the radio wave pulses energy that nuclear spin absorbs and launches, and this coil is being gone back simultaneously as transmitting coil as receiving coil sometimes.Under the help of radio wave pulses energy, the Magnetic resonance imaging scanner can the position patient body in a very little point, confirm that then this is the tissue of which kind of type.The magnetic resonance imaging machine device adopts the radio frequency pulse specific to hydrogen atom.The system pilot pulse is aimed at the body region that institute will check, and causes this regional proton to absorb they are rotated or the required energy of precession with different directions.This is NMR imaging device " resonance " part.Radio frequency pulse forces their (referring to a pair of or two pairs of unmatched protons unnecessary in each 1,000,000 proton) under CF, to be rotated according to specific direction.The CF that causes resonance is called as Rameau that frequency, and this value is to calculate according to the magnetic field intensity of the particular organization that will form images and main field to draw.Radio frequency pulse utilizes a coil to provide usually, and this coil is called transmitting coil.The necessary quite near-earth of the receiving coil of existing Magnetic resonance imaging equipment is near detected part, to obtain the magnetic signal that is discharged by detected part.
Ultra material is meant artificial composite structure or the composite material that some have the not available extraordinary physical property of natural material.Structurally ordered design through on the key physical yardstick of material can break through the restriction of some apparent natural law, thereby obtains to exceed the meta-materials function of nature with the common character that has.The character of ultra material and function mainly come from its inner structure but not constitute their material.At present; The geometry of the artificial micro-structural of existing metal is the perhaps open annular of similar " recessed " font as shown in Figure 1 of " worker " font; But this structure all can not realize magnetic permeability μ and be significantly less than 0 or ultra material resonances frequency is reduced, and can not realize isotropism, has only the artificial micro-structural of metal that has the special geometric figure through design; Could make this artificial electromagnetic material in special frequency, reach magnetic permeability μ value, and have lower resonance frequency less than 0.
[summary of the invention]
Technical problem to be solved by this invention is; To the higher defective of the ultra material resonances frequency of negative magnetoconductivity in the prior art; Provide a kind of resonance frequency the lower ultra material of isotropism negative magnetoconductivity, in addition, the ultra material of negative magnetoconductivity of the present invention has bigger application in the magnetic signal enhance device.
The present invention realizes that the technical scheme that goal of the invention adopts is; Comprise that one deck at least has the ultra material layer of negative magnetoconductivity; Said ultra material layer comprises that substrate and cyclic array are arranged in a plurality of first artificial micro-structural and the second artificial micro-structural of substrate both sides; The said first artificial micro-structural is made up of the first artificial microstructure unit of four circular array; The said second artificial micro-structural is made up of the second artificial microstructure unit of four circular array; The said first artificial microstructure unit and the second artificial microstructure unit are openings on one jiao split ring resonator structure; The position of the said second artificial microstructure unit is corresponding one by one with the first artificial microstructure unit, the shape that the shape that is shaped as the said first artificial microstructure unit of the said second artificial microstructure unit obtains around the geometric center Rotate 180 degree of said annular array.
Preferably, be covered with protective layer on the said first artificial micro-structural and the second artificial micro-structural.
Preferably, said protective layer thickness is 0.08-0.12mm.
Preferably, the dielectric constant of said protective layer is 4-8.
Preferably, the loss tangent value of said protective layer is 0.010-0.015.
Preferably, said protective layer is high-molecular organic material or ceramic material.
Preferably, the thickness of said substrate is 0.008-0.015mm.
Preferably, the dielectric constant of said substrate is 14-20.
Preferably, the loss tangent value of said substrate is 0.003-0.007.
A kind of MRI magnetic signal enhance device is arranged between the magnetic signal receiving coil of detected part and MRI imaging device, and said MRI magnetic signal enhance device is ultra material, and said ultra material has negative magnetoconductivity under the magnetic signal operating frequency of MRI imaging device.
Preferably, said ultra material is the ultra material of above-described negative magnetoconductivity.
Beneficial effect of the present invention is that the ultra material of the present invention is formed by stacking the artificial micro-structural of multilayer through particular design, and substrate adopts the material that dielectric constant is higher, loss is lower, can reduce the resonance frequency of ultra material greatly, has bright development prospect.The present invention can be applied in the magnetic amplifier spare; Magnetic amplifier spare utilizes the magnetic permeability of the ultra material of negative magnetoconductivity to be negative this characteristic; Reaching the effect that signal strengthens, reduce the frequency of the ultra material of negative magnetoconductivity, is in order to obtain more the operating frequency near the MRI imaging device; Make MRI imaging device imaging effect better, reduce the cost of MRI imaging device.
[description of drawings]
Fig. 1, the existing artificial micro-structural sketch map of the ultra material of negative magnetoconductivity;
Fig. 2, the structural representation of the ultra material of the preferred embodiment of the present invention;
Fig. 3, the preferred embodiment of the present invention first artificial micro-structural sketch map;
Fig. 4, the preferred embodiment of the present invention first artificial microstructure unit structural representation;
Fig. 5, the preferred embodiment of the present invention second artificial micro-structural sketch map;
Fig. 6, the preferred embodiment of the present invention second artificial microstructure unit structural representation;
Fig. 7, the structural representation of the ultra material of the another preferred embodiment of the present invention;
Fig. 8, preferred embodiment of the present invention magnetic permeability simulated effect sketch map;
Among the figure, 1 first artificial micro-structural, 2 second artificial micro-structurals, 3 substrates, 4 protective layers, 11 first artificial microstructure units, 22 second artificial microstructure units.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
The present invention provides a kind of negative magnetoconductivity ultra material; As shown in Figure 2; Comprise that one deck at least has the ultra material layer of negative magnetoconductivity; Ultra material layer comprises that substrate 3 and cyclic array are arranged in a plurality of first artificial micro-structural 1 and the second artificial micro-structural 2 of substrate 3 both sides, and as shown in Figure 3, the first artificial micro-structural 1 is made up of the first artificial microstructure unit 11 of four circular array.As shown in Figure 5; The second artificial micro-structural 2 is made up of the second artificial microstructure unit 22 of four circular array; Like Fig. 4, shown in Figure 6; The first artificial microstructure unit 11 and the second artificial microstructure unit 22 are openings on one jiao split ring resonator structure; The position of the second artificial microstructure unit 22 is corresponding one by one with the first artificial microstructure unit 11, the shape that the shape that is shaped as the first artificial microstructure unit 11 of the second artificial microstructure unit 22 obtains around the geometric center Rotate 180 degree of said annular array.
To combine accompanying drawing below, the principle of compositionality and the beneficial effect of the ultra material of negative magnetoconductivity of the embodiment of the invention elaborated.
The first artificial micro-structural 1 and the second artificial micro-structural 2 are in two relative sides of substrate 3 periodically arranges; For example rectangular array is arranged; Promptly be row, serve as that row ground is arranged with y direction perpendicular to the x direction with an x direction; And each line space, each column pitch equate respectively, even line space equals column pitch and all can.Preferred line space, column pitch be not more than the incident electromagnetic wave that will respond wavelength 1/5th; Promptly for example operational environment is that wavelength is the electromagnetic wave of λ; Needing ultra material is to present negative magnetoconductivity to this electromagnetic electromagnetic property; When then designing artificial micro-structural above-mentioned line space, column pitch are selected to be not more than λ/5, be preferably λ/10.Obviously, do not overlap mutually in order to make artificial micro-structural, the length of each artificial micro-structural and width also are not more than λ/5.Periodically arranging to have other to have the arrangement mode of circulation law; For example when substrate 3 is circle or polygon; The first artificial micro-structural 1 and the second artificial micro-structural 2 are along equidistant one week of array of the external cylindrical surface of circle or polygon substrate 3; The substrate 3 of the preferred embodiment of the present invention is a rectangle, referring to Fig. 2.
When ultra material layer has when a plurality of, can they be encapsulated according to certain rules, shown in the structural representation of the ultra material of the another preferred embodiment of Fig. 7 the present invention, this embodiment comprises two-layer ultra material layer.The present invention is for example when substrate 3 is tabular; Each ultra material layer is arranged in order along the direction perpendicular to substrate 3 surfaces, is arranged in parallel between layer and the layer, and preferred parallel and spacing equate; When substrate 3 is above-mentioned circle or polygon, then can with the concyclic axle of a plurality of ultra material layers install and fix.
The present invention's first artificial micro-structural 1 and the second artificial micro-structural 2; Like Fig. 3, shown in Figure 5; The first artificial micro-structural 1 and the second artificial micro-structural 2 combine by four independently artificial microstructure units; Any artificial microstructure unit is opening on one jiao split ring resonator structure, the shape that the shape that is shaped as the first artificial microstructure unit 11 of the second artificial microstructure unit 22 obtains around the geometric center Rotate 180 degree of said annular array.The first artificial microstructure unit 11 and the second artificial microstructure unit 22 can be selected copper cash, silver-colored line, copper alloy for use; Or even gold thread; Or nonmetallic electric conducting material, like conductive plastics etc., the first artificial microstructure unit 11 and the second artificial microstructure unit 22 nested numbers of plies are greater than 2.The live width of the first artificial microstructure unit 11 and the second artificial microstructure unit 22 is 0.1-0.3mm; The thickness of the first artificial microstructure unit 11 and the second artificial microstructure unit 22 is 0.03-0.05mm, and the distance between centers of tracks of the first artificial microstructure unit 11 and the second artificial microstructure unit 22 is 0.05-0.15mm.The first artificial microstructure unit 11 of the preferred embodiment of the present invention and the second artificial microstructure unit 22 use copper cash; Live width d1 is 0.10mm; Live width d2 is
d1, d2 such as Fig. 4, shown in Figure 6; The thickness of copper cash is 0.033mm; The distance between centers of tracks of copper cash is 0.10mm, and the overall dimensions of the first artificial micro-structural 11 and the second artificial micro-structural 22 is 3mm * 3mm.Can increase the overall dimensions of the nested number of plies or the artificial micro-structural of convergent-divergent of artificial microstructure unit according to the needs of adjustment frequency.
The present invention realizes that the principle of negative magnetoconductivity does, for artificial micro-structural, can equivalence be the LC oscillating circuit; The copper cash equivalence is an inductance L, and the coupling capacitance equivalent capacity C between line capacitance, the triangle torus finds through emulation; Under the immovable situation of other conditions; Copper cash is long more, and distance between centers of tracks is near more, and then equivalent capacitance value C is big more.
In like manner we can judge the variation of inductance L qualitatively, and the copper cash line length is long more, and inductance L is big more.The copper cash winding turns of artificial microstructure unit is many more among the present invention, its inductance bigger (having mutual inductance).
Prior art is directly " spill " shown in Figure 1 split ring resonator cyclic array to be arranged on the substrate; Process ultra material; Ultra material is anisotropic; The artificial micro-structural of the ultra material of the present invention is like Fig. 3, artificial micro-structural stack group shown in Figure 4, not only can effectively reduce the resonance frequency of ultra material, can also realize the isotropism of ultra material.
With CST the ultra material of negative magnetoconductivity of the embodiment of the invention is carried out emulation, the simulation architecture parameter is d1=0.1mm;
d1, d2 such as Fig. 4, shown in Figure 6, copper cash distance between centers of tracks 0.1mm, copper cash thickness 0.033mm; The thickness of substrate 3 is that 0.011mm, dielectric constant are 16, loss tangent value is 0.005 ceramic substrate, and protective layer 4 is the PP material, and thickness is 0.1mm; Dielectric constant is 4.8, and loss tangent value is the size 3mm * 3mm of 0.013, the first artificial micro-structural 1 and the second artificial micro-structural 2; The simulation result sketch map can be known by Fig. 6 that referring to Fig. 6 the ultra material magnetic permeability of the present invention is 1.49GHz for-1 respective frequencies; The frequency reducing effect is remarkable, and loss is less, can realize the isotropism of ultra material; For the development of ultra material industry, significant.
The ultra material of negative magnetoconductivity according to the present invention; Can prepare a kind of MRI magnetic signal enhance device: in the MRI imaging device; MRI magnetic signal enhance device is arranged between the magnetic signal receiving coil of detected part and MRI imaging device; MRI magnetic signal enhance device is the ultra material of negative magnetoconductivity of the present invention, and the ultra material of the present invention has negative magnetoconductivity under the magnetic signal operating frequency of MRI imaging device, and the resonance frequency of the ultra material of negative magnetoconductivity can strengthen its signal strength signal intensity at the magnetic signal working frequency range; And then the image quality of Contrast-enhanced MRI imaging device, the cost of reduction MRI imaging device.Has bright development prospect.
The foregoing description among the present invention has only been done exemplary description, and those skilled in the art can carry out various modifications to the present invention under the situation that does not break away from the spirit and scope of the present invention after reading present patent application.
Claims (14)
1. ultra material of negative magnetoconductivity; Comprise that one deck at least has the ultra material layer of negative magnetoconductivity; Said ultra material layer comprises that substrate and cyclic array are arranged in a plurality of first artificial micro-structural and the second artificial micro-structural of substrate both sides; It is characterized in that; The said first artificial micro-structural is made up of the first artificial microstructure unit of four circular array; The said second artificial micro-structural is made up of the second artificial microstructure unit of four circular array; The said first artificial microstructure unit and the second artificial microstructure unit are openings on one jiao split ring resonator structure, and the position of the said second artificial microstructure unit is corresponding one by one with the first artificial microstructure unit, the shape that the shape that is shaped as the said first artificial microstructure unit of the said second artificial microstructure unit obtains around the geometric center Rotate 180 degree of said annular array.
2. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that, is covered with protective layer on the said first artificial micro-structural and the second artificial micro-structural.
3. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the thickness of said protective layer is 0.08-0.12mm.
4. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the dielectric constant of said protective layer is 4-8.
5. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the loss tangent value of said protective layer is 0.010-0.015.
6. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that said protective layer is high-molecular organic material or ceramic material.
7. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the thickness of said substrate is 0.008-0.015mm.
8. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the dielectric constant of said substrate is 14-20.
9. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the loss tangent value of said substrate is 0.003-0.007.
10. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the live width of said artificial micro-structural is 0.1-0.3mm.
11. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that, the distance between centers of tracks of said artificial micro-structural is 0.05-0.15mm.
12. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that, the line thickness of said artificial micro-structural is 0.03-0.05mm.
13. MRI magnetic signal enhance device; Be arranged between the magnetic signal receiving coil of detected part and MRI imaging device; It is characterized in that said MRI magnetic signal enhance device is ultra material, said ultra material has negative magnetoconductivity under the magnetic signal operating frequency of MRI imaging device.
14. MRI magnetic signal enhance device according to claim 13 is characterized in that, said ultra material is the ultra material of the arbitrary described negative magnetoconductivity of claim 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210110055.9A CN102683872B (en) | 2012-04-16 | 2012-04-16 | A kind of negative-magnetic-permeability meta-material and MRI magnetic signal enhancement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210110055.9A CN102683872B (en) | 2012-04-16 | 2012-04-16 | A kind of negative-magnetic-permeability meta-material and MRI magnetic signal enhancement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102683872A true CN102683872A (en) | 2012-09-19 |
| CN102683872B CN102683872B (en) | 2016-02-24 |
Family
ID=46815462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210110055.9A Active CN102683872B (en) | 2012-04-16 | 2012-04-16 | A kind of negative-magnetic-permeability meta-material and MRI magnetic signal enhancement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102683872B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931494A (en) * | 2012-11-10 | 2013-02-13 | 清华大学 | Optical frequency intrinsic supernormal electromagnetic dielectric material and preparation and application method thereof |
| CN104459585A (en) * | 2014-11-27 | 2015-03-25 | 骆柳春 | Magnetic signal enhancement device used for magnetic resonance imaging |
| CN107994352A (en) * | 2017-12-27 | 2018-05-04 | 北京航天飞腾装备技术有限责任公司 | A kind of wave-absorber unit, electromagnetic wave absorption body and radio frequency sending set |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070215843A1 (en) * | 2005-11-14 | 2007-09-20 | Iowa State University Research Foundation | Structures With Negative Index Of Refraction |
| CN101268593A (en) * | 2005-09-19 | 2008-09-17 | 惠普开发有限公司 | Method and apparatus for electromagnetic resonance using negative index material |
| CN101292175A (en) * | 2005-10-18 | 2008-10-22 | 特西奥普技术有限公司 | Method and apparatus for high-gain magnetic resonance imaging |
-
2012
- 2012-04-16 CN CN201210110055.9A patent/CN102683872B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101268593A (en) * | 2005-09-19 | 2008-09-17 | 惠普开发有限公司 | Method and apparatus for electromagnetic resonance using negative index material |
| CN101292175A (en) * | 2005-10-18 | 2008-10-22 | 特西奥普技术有限公司 | Method and apparatus for high-gain magnetic resonance imaging |
| US20070215843A1 (en) * | 2005-11-14 | 2007-09-20 | Iowa State University Research Foundation | Structures With Negative Index Of Refraction |
Non-Patent Citations (2)
| Title |
|---|
| ANTENNAS AND PROPAGATION (APSURSI), 2011 IEEE INTERNATIONAL SYMP: "《Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on》", 8 July 2011 * |
| T. SERKAN KASIRGA ET AL.: "Microfluidics for reconfigurable electromagnetic metamaterials", 《APPLIED PHYSICS LETTERS》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931494A (en) * | 2012-11-10 | 2013-02-13 | 清华大学 | Optical frequency intrinsic supernormal electromagnetic dielectric material and preparation and application method thereof |
| CN104459585A (en) * | 2014-11-27 | 2015-03-25 | 骆柳春 | Magnetic signal enhancement device used for magnetic resonance imaging |
| CN107994352A (en) * | 2017-12-27 | 2018-05-04 | 北京航天飞腾装备技术有限责任公司 | A kind of wave-absorber unit, electromagnetic wave absorption body and radio frequency sending set |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102683872B (en) | 2016-02-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103296466A (en) | Metamaterial with negative magnetic permeability, and MRI magnetic signal enhancement device | |
| CN103969609B (en) | A kind of local coil and magnetic resonance imaging system | |
| CN102723608A (en) | Metamaterial | |
| CN102683872A (en) | Metamaterial having negative magnetic permeability and magnetic resonance imaging (MRI) magnetic signal enhancement device | |
| Kang et al. | Analysis of MR‐WPT using planar textile resonators for wearable applications | |
| CN102709704B (en) | A kind of MRI magnetic signal enhancement device | |
| CN102709705B (en) | MRI (magnetic resonance imaging) magnetic signal enhancement device | |
| CN102593599A (en) | Negative permeability metamaterial | |
| CN102593595A (en) | Negative magnetic permeability metamaterial | |
| CN103296446B (en) | A kind of Meta Materials and MRI image enhancement devices | |
| CN103367923B (en) | A kind of Meta Materials and MRI magnetic signal enhancement device | |
| CN102349831A (en) | Superlens based on artificial electromagnetic structure in nuclear magnetic resonance imaging | |
| CN103296465A (en) | Metamaterial with negative magnetic permeability, and MRI magnetic signal enhancement device | |
| ES2344391B1 (en) | DEVICE FOR IMPROVING THE SENSITIVITY OF THE RECEIVING COILS MEDICAL IMAGES BY MAGNETIC RESONANCE. | |
| CN103367921A (en) | Meta-material and MRI magnetic signal enhancement device | |
| CN103296464A (en) | Metamaterial with negative magnetic permeability, and MRI magnetic signal enhancement device | |
| CN102593592A (en) | Negative magnetic conductivity metamaterial | |
| CN102683880B (en) | A kind of Meta Materials and MRI magnetic signal enhancement device | |
| Wu et al. | Development of a magnetoinductive lens for magnetic resonance imaging | |
| CN104409866A (en) | Magnetic signal enhancement device | |
| CN103367922B (en) | A kind of Meta Materials and MRI magnetic signal enhancement device | |
| CN103296467A (en) | Metamaterial with negative magnetic permeability | |
| CN102683878B (en) | A kind of MRI magnetic signal enhancement device | |
| CN102680922B (en) | A kind of novel MRI body phased-array coil | |
| CN103367924A (en) | Meta-material and MRI magnetic signal enhancement device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210427 Address after: 518057 2 / F, software building, No.9, Gaoxin Middle Road, Nanshan District, Shenzhen, Guangdong Province Patentee after: KUANG-CHI INSTITUTE OF ADVANCED TECHNOLOGY Address before: 518034. A, 18B, CIC international business center, 1061 Mei Xiang Road, Shenzhen, Guangdong, Futian District Patentee before: KUANG-CHI INNOVATIVE TECHNOLOGY Ltd. |
|
| TR01 | Transfer of patent right |