CN102593595A - Negative magnetic permeability metamaterial - Google Patents
Negative magnetic permeability metamaterial Download PDFInfo
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- CN102593595A CN102593595A CN2012100505844A CN201210050584A CN102593595A CN 102593595 A CN102593595 A CN 102593595A CN 2012100505844 A CN2012100505844 A CN 2012100505844A CN 201210050584 A CN201210050584 A CN 201210050584A CN 102593595 A CN102593595 A CN 102593595A
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Abstract
The invention relates to a negative magnetic permeability metamaterial comprising a dielectric substrate and micro-structures arrayed on the dielectric substrate. The micro-structure is composed of four same micro-structure units, any one of the micro-structures respectively coincides with other three micro-structure units after being rotated by 90 degrees, 180 degrees and 270 degrees around a same rotation shaft, and the micro-structure unit is of a multiple embedded concave opening resonance loop structure or a derived structure of the opening resonance loop formed by treating a metal line in a mode of multiple winding. On the premise of realizing negative magnetic permeability, with the adoption of the negative magnetic permeability material, the resonance frequency of the metamaterial can be effectively reduced, and the metamaterial meeting isotropy can be prepared, and therefore, the negative magnetic permeability metamaterial is of significance in the development of a metamaterial industry.
Description
[technical field]
The present invention relates to ultra field of materials, relate to the ultra material of a kind of negative magnetoconductivity 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.In the already present material of existing natural circle, μ is greater than 0.
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 the intrinsic common character of nature.The character of ultra material and function mainly come from its inner structure but not constitute their material.At present; The geometry of existing artificial micro-structural 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 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, and is higher to the ultra material resonances frequency of negative magnetoconductivity in the prior art, can not realize isotropic situation, provides a kind of resonance frequency the lower ultra material of isotropism negative magnetoconductivity.
The technical scheme that realization goal of the invention of the present invention adopts is; Construct the ultra material of a kind of negative magnetoconductivity; Said ultra material comprises medium substrate and is fixed on the microstructured layers on the medium substrate; Said microstructured layers is formed by a plurality of micro structure arrays, it is characterized in that, said micro-structural is made up of four identical microstructure units; Said arbitrary microstructure unit overlaps with other three microstructure units respectively behind same rotating shaft half-twist, 180 °, 270 °, and said microstructure unit is formed the spill split ring resonator of multinest through the mode of multiple coiling by a wires.
In the ultra material of negative magnetoconductivity of the present invention, said ultra material is by two-layer said medium substrate and three layers of alternate cascading of said microstructured layers.
In the ultra material of negative magnetoconductivity of the present invention; The position of said microstructure unit is one to one; Said microstructure unit opening direction does, the opening direction of two outer microtube construction units is identical, and the opening direction of intermediate layer microstructure unit and outer microtube construction unit is opposite.
In the ultra material of negative magnetoconductivity of the present invention, said microstructure unit is an electric conducting material.
In the ultra material of negative magnetoconductivity of the present invention, the overall dimensions of said ultra material is 30mm * 30mm.
In the ultra material of negative magnetoconductivity of the present invention, the live width 0.05-0.15mm of said metal wire.
In the ultra material of negative magnetoconductivity of the present invention, the distance between centers of tracks 0.05-0.15mm of said metal wire.
In the ultra material of negative magnetoconductivity of the present invention, the thickness 0.015-0.020mm of said metal wire.
In the ultra material of negative magnetoconductivity of the present invention, the medium substrate of said ultra material is FR-4 substrate or ceramic substrate.
In the ultra material of negative magnetoconductivity of the present invention, said two layer medium substrate thickness is identical, is 0.10mm-0.30mm.
In the ultra material of negative magnetoconductivity of the present invention, the number of turns of said multiple coiling is greater than 2.
Beneficial effect of the present invention is that the metal micro structure that multiple coiling forms is equivalent to increase electric capacity and inductance; Electric capacity and inductance increase, and its corresponding resonance frequency will reduce, the design that the present invention is range upon range of to microstructure unit arrangement mode, microstructured layers and medium substrate; Strengthen the coupling of each interlayer, reached the effect that increases overall inductance electric capacity, thereby further reduced the frequency of ultra material; Simultaneously, the arrangement mode of microstructure unit makes whole ultra material be isotropism; Practical, have bright development prospect.
[description of drawings]
Fig. 1, the ultra material microstructure sketch map of existing negative magnetoconductivity;
Fig. 2, microstructure unit sketch map of the present invention;
Fig. 3, Fig. 2 microstructure unit opening direction sketch map;
Fig. 4, embodiment of the invention end view;
Fig. 5, the right view of Fig. 4;
Fig. 6, further embodiment of this invention end view;
Fig. 7, the right view of Fig. 6;
Fig. 8, the micro-structural sketch map of the embodiment of the invention;
Fig. 9, the micro-structural simulation result sketch map of the ultra material of existing negative magnetoconductivity;
Figure 10, micro-structural simulation result sketch map of the present invention;
Among the figure, the opening part of 1 microstructure unit, 2,3 micro-structurals, a, b, c, f microstructured layers, d, e, g medium substrate.
[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, and comprising medium substrate d, e, g and be fixed on microstructured layers a, b, c, the f on the medium substrate, said microstructured layers a, b, c, f are formed by micro-structural 2,3 arrays; Micro-structural 2,3 is made up of four identical microstructure units; Arbitrary microstructure unit overlaps with other three microstructure units respectively behind same rotating shaft half-twist, 180 °, 270 °, and in the present invention, rotating shaft is perpendicular to the O point; The horizontal offset of O point all directions is 0.05mm; Shown in the micro-structural sketch map of Fig. 8 embodiment of the invention, four microstructure units ringwise, equidistant array; The all directions of this homogeneous texture in the space are identical to electromagnetic response; Can make ultra material realize isotropism, microstructure unit forms the spill split ring resonator of multinest by a wires through the mode of multiple coiling, and the mode of this multiple coiling has reduced the resonance frequency of ultra material; Directly over the opening part 1 of microstructure unit shown in Figure 2 pointed to, arrow points shown in Figure 3 was the opening direction of Fig. 2 microstructure unit.
To combine accompanying drawing below, the principle of compositionality of the ultra material of negative magnetoconductivity and the beneficial effect of realization among two embodiment of the present invention will be elaborated.
Shown in Fig. 4 embodiment of the invention end view; The ultra material of the negative magnetoconductivity of the embodiment of the invention by two layer medium substrate d, e and three layers of microstructured layers a, b, c is alternate cascades; Each microstructure unit opening direction among outer microtube structure sheaf a, the c is all identical; Each microstructure unit among three layers of microstructured layers a, b, the c all is one to one; Each microstructure unit opening direction among microstructure unit opening direction among the micro-structural b of intermediate layer and a, the c is opposite fully, and Fig. 5 is the end view of Fig. 4, and micro-structural 2 comprises 4 microstructure units; Each microstructure unit is shown in Fig. 2 microstructure unit sketch map of the present invention, and the opening direction of each microstructure unit is shown in the micro-structural sketch map of Fig. 8 embodiment of the invention.
Shown in Fig. 6 further embodiment of this invention end view; This micro-structural is made up of medium substrate g and microstructured layers f, can know that by right view Fig. 7 of Fig. 6 microstructured layers f is formed by a plurality of micro-structural 3 array arrangements; Micro-structural 3 comprises 4 microstructure units; Each microstructure unit is shown in Fig. 2 microstructure unit sketch map of the present invention, and the opening direction of each microstructure unit is shown in the micro-structural sketch map of Fig. 8 embodiment of the invention, and this structure can realize the isotropism of ultra material.
The ultra material medium substrate of negative magnetoconductivity of the present invention can use FR-4 substrate or ceramic substrate, and micro-structural can be used metal wire, like copper cash, silver-colored line, copper alloy, or even gold thread, or nonmetallic electric conducting material, like conductive plastics etc.Medium substrate d, e, the g of the ultra material of two embodiment of the present invention select the FR-4 substrate for use; Thickness is 0.20mm; Microstructure unit shown in Figure 2 uses copper cash, and the live width of copper cash is 0.10mm, and the thickness of copper cash is 0.018mm; The distance between centers of tracks of copper cash is 0.10mm, and the overall dimensions of ultra material is 30mm * 30mm.
The present invention realizes that the principle of negative magnetoconductivity does, for the split ring resonator micro-structural, can equivalence be the LC oscillating circuit; The metal wire equivalence is an inductance L, and the coupling capacitance equivalent capacity C between line capacitance, the split ring resonator 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 microstructure unit is many more among the present invention, its inductance bigger (having mutual inductance).
Hereinafter will be an example with the micro-structural of prior art shown in Figure 1, and micro-structural more of the present invention is with respect to the superiority of prior art micro-structural.
Prior art be directly with spill split ring resonator array arrangement shown in Figure 1 on medium substrate; Process ultra material; The present invention forms micro-structural with the rule of arranging of 4 microstructure units through setting, and some micro structure arrays is arranged in forms microstructured layers on the medium substrate again; At last microstructured layers and medium substrate are laminated together to form ultra material by mode shown in Figure 4, can realize the isotropism of ultra material.
Be the relatively difference of prior art and performance of the present invention, with CST the ultra material of negative magnetoconductivity of ultra material of prior art negative magnetoconductivity and embodiment 1 carried out emulation, the structural parameters of ultra material of setting ultra material of the prior art and embodiment 1 during emulation are identical; The micro-structural simulation result sketch map of the ultra material of existing negative magnetic conductance can be known by Fig. 9 that referring to Fig. 9 prior art will realize that magnetic permeability is less than 0; Its respective frequencies is more than 350MHz, and loss is bigger, and micro-structural simulation result sketch map of the present invention is referring to Figure 10; Can know that by Figure 10 the respective frequencies that ultra material of the present invention is realized negative magnetoconductivity is significantly less than the frequency that the ultra material of prior art is realized negative magnetoconductivity in 10MHz; The frequency reducing effect is remarkable; Loss is less, and is for the development of ultra material industry, significant.
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 (11)
1. ultra material of negative magnetoconductivity; Said ultra material comprises medium substrate and is fixed on the microstructured layers on the medium substrate; Said microstructured layers is formed by a plurality of micro structure arrays; It is characterized in that; Said micro-structural is made up of four identical microstructure units, and said arbitrary microstructure unit overlaps with other three microstructure units respectively behind same rotating shaft half-twist, 180 °, 270 °, and said microstructure unit is formed the spill split ring resonator of multinest through the mode of multiple coiling by a wires.
2. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that, said ultra material is by two-layer said medium substrate and three layers of alternate cascading of said microstructured layers.
3. the ultra material of negative magnetoconductivity according to claim 2; It is characterized in that; The position of said microstructure unit is one to one; Said microstructure unit opening direction does, the opening direction of two outer microtube construction units is identical, and the opening direction of intermediate layer microstructure unit and outer microtube construction unit is opposite.
4. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that said microstructure unit is an electric conducting material.
5. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the overall dimensions of said ultra material is 30mm * 30mm.
6. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the live width 0.05-0.15mm of said metal wire.
7. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that, the distance between centers of tracks 0.05-0.15mm of said metal wire.
8. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that, the thickness 0.015-0.020mm of said metal wire.
9. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the medium substrate of said ultra material is FR-4 substrate or ceramic substrate.
10. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that said two layer medium substrate thickness is identical, is 0.10mm-0.30mm.
11. the ultra material of negative magnetoconductivity according to claim 1 is characterized in that the number of turns of said multiple coiling is greater than 2.
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| CN2012100505844A CN102593595A (en) | 2012-02-29 | 2012-02-29 | Negative magnetic permeability metamaterial |
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| CN2012100505844A CN102593595A (en) | 2012-02-29 | 2012-02-29 | Negative magnetic permeability metamaterial |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802394A (en) * | 2012-08-03 | 2012-11-28 | 深圳光启创新技术有限公司 | Wave-absorbing material |
| CN102821589A (en) * | 2012-08-03 | 2012-12-12 | 深圳光启创新技术有限公司 | Wave absorbing material |
| CN102843900A (en) * | 2012-08-03 | 2012-12-26 | 深圳光启创新技术有限公司 | Wave absorbing material |
| CN103582402A (en) * | 2012-08-03 | 2014-02-12 | 深圳光启创新技术有限公司 | Wave absorbing material |
| CN104682013A (en) * | 2015-02-09 | 2015-06-03 | 北京理工大学 | Wide-angle polarization-insensitive low RCS meta-material wave absorber |
| CN104682007A (en) * | 2013-12-03 | 2015-06-03 | 深圳光启创新技术有限公司 | Wave-transparent meta-material |
| CN113922063A (en) * | 2021-11-23 | 2022-01-11 | 电子科技大学 | Microstrip structure array capable of increasing antenna gains of different resonant frequency points and application thereof |
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| CN101389998A (en) * | 2004-07-23 | 2009-03-18 | 加利福尼亚大学董事会 | Metamaterials |
| US7864114B2 (en) * | 2005-03-02 | 2011-01-04 | National University Corporation Yamaguchi University | Negative permeability or negative permittivity meta material and surface wave waveguide |
| CN202094299U (en) * | 2011-06-01 | 2011-12-28 | 深圳光启高等理工研究院 | Antenna and MIMO antenna comprising same |
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| CN101389998A (en) * | 2004-07-23 | 2009-03-18 | 加利福尼亚大学董事会 | Metamaterials |
| US7864114B2 (en) * | 2005-03-02 | 2011-01-04 | National University Corporation Yamaguchi University | Negative permeability or negative permittivity meta material and surface wave waveguide |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802394A (en) * | 2012-08-03 | 2012-11-28 | 深圳光启创新技术有限公司 | Wave-absorbing material |
| CN102821589A (en) * | 2012-08-03 | 2012-12-12 | 深圳光启创新技术有限公司 | Wave absorbing material |
| CN102843900A (en) * | 2012-08-03 | 2012-12-26 | 深圳光启创新技术有限公司 | Wave absorbing material |
| CN103582402A (en) * | 2012-08-03 | 2014-02-12 | 深圳光启创新技术有限公司 | Wave absorbing material |
| CN102821589B (en) * | 2012-08-03 | 2015-07-01 | 深圳光启创新技术有限公司 | Wave absorbing material |
| CN102802394B (en) * | 2012-08-03 | 2016-08-03 | 深圳光启创新技术有限公司 | A kind of absorbing material |
| CN102843900B (en) * | 2012-08-03 | 2018-07-24 | 深圳光启创新技术有限公司 | A kind of absorbing material |
| CN103582402B (en) * | 2012-08-03 | 2019-01-22 | 深圳光启创新技术有限公司 | A kind of absorbing material |
| CN104682007A (en) * | 2013-12-03 | 2015-06-03 | 深圳光启创新技术有限公司 | Wave-transparent meta-material |
| CN104682013A (en) * | 2015-02-09 | 2015-06-03 | 北京理工大学 | Wide-angle polarization-insensitive low RCS meta-material wave absorber |
| CN113922063A (en) * | 2021-11-23 | 2022-01-11 | 电子科技大学 | Microstrip structure array capable of increasing antenna gains of different resonant frequency points and application thereof |
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Application publication date: 20120718 |