CN103682655A - Microstructure, metamaterial plate and antenna system - Google Patents
Microstructure, metamaterial plate and antenna system Download PDFInfo
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- CN103682655A CN103682655A CN201210316736.0A CN201210316736A CN103682655A CN 103682655 A CN103682655 A CN 103682655A CN 201210316736 A CN201210316736 A CN 201210316736A CN 103682655 A CN103682655 A CN 103682655A
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Abstract
The invention provides a microstructure, a metamaterial plate and an antenna system. The topological pattern of the microstructure takes a central point as a rotation point to rotate for 90 degrees in the clockwise direction or the counterclockwise direction to obtain a new topological pattern which is overlapped with the original topological pattern; the microstructure comprises a first basic structure and a second basic structure, wherein the second basic structure is obtained by rotating the first basic structure for 90 degrees in the clockwise direction by taking a central point of a second metal branch as a rotation point. The metamaterial plate comprises a layer or multiple layers of base materials, wherein a first microstructure and a second microstructure are respectively periodically distributed on two opposite side surfaces of each layer of base material; the second microstructure and the first microstructure are in mirror symmetry. The antenna system comprises a feed source and the metamaterial plate arranged on the path of electromagnetic wave radiated by the feed source. According to the microstructure, the metamateiral plate and the antenna system, by designing the topological shape and/or size of the microstructure of the metamaterial, the gain of the feed source can be increased without changing the feed source in the antenna system.
Description
Technical field
The present invention relates to super material technology field, relate in particular to a kind of micro-structural, super plate of material and antenna system.
Background technology
Light, as electromagnetic a kind of, it is when passing glass, because the wavelength of light is much larger than the size of atom, therefore we can use the univers parameter of glass, and the details parameter of the atom of for example refractive index, rather than composition glass is described the response of glass to light.Accordingly, when research material is to other electromagnetic responses, in material, any yardstick also can be used the univers parameter of material much smaller than the structure of electromagnetic wavelength to electromagnetic response, and for example DIELECTRIC CONSTANT ε and magnetic permeability μ describe.Structure by every of designing material makes the dielectric constant of material each point all identical or different with magnetic permeability, thereby making the dielectric constant of material monolithic and magnetic permeability be certain rule arranges, the magnetic permeability that rule is arranged and dielectric constant can make material have the response in macroscopic view to electromagnetic wave, such as converging electromagnetic wave, divergent electromagnetic ripple, electromagnetic wave absorption etc.Such has magnetic permeability that rule arranges and the material of dielectric constant is referred to as super material.
As shown in Figure 1, Fig. 1 is the perspective view of the elementary cell of the super material of existing formation.The elementary cell of super material comprises the base material 200 that the artificial micro-structural 100 of snowflake type and this artificial micro-structural are adhered to.The artificial micro-structural of snowflake type can be artificial metal's micro-structural, and it can produce response to change each super material elementary cell response to incident electromagnetic wave to incident electromagnetic wave electric field and/or magnetic field.A plurality of super material elementary cells are arranged according to certain rules, can make super material have macroscopical response to electromagnetic wave.Because super material monolithic need have macroscopical electromagnetic response to incident electromagnetic wave, therefore each super material elementary cell need form continuous response to the response of incident electromagnetic wave, this requires the size of each super material elementary cell to be less than incident electromagnetic wave 1/5th wavelength, is preferably incident electromagnetic wave 1/10th wavelength.During this section is described, to surpass material monolithic, to be divided into a plurality of super material elementary cells are a kind of man-made division methods, but should know that this kind of division methods only for convenience of description, should not regard super material as by a plurality of super material elementary cell splicings or assemble, in practical application, super material is that artificial metal's micro-structural is arranged on base material and can be formed, and technique is simple and with low cost.
The micro-structural topology of super material and/or size are to change the important parameter of super material to electromagnetic electromagnetic response.The micro-structural topology of existing super material is too simple, and single to electromagnetic response, purposes is less.
Summary of the invention
Technical problem to be solved by this invention is, above-mentioned deficiency for prior art, propose a kind of micro-structural, described micro-structural topology pattern be take its central point as the point of rotation, and the new topological pattern along clockwise direction or counterclockwise obtaining after half-twist overlaps with former topological pattern; Described micro-structural comprises the first basic structure and the second basic structure, and described the first basic structure comprises and equidistantly be arrangeding in parallel and the first metal branch, the second metal branch and San metal branch equal in length; Second metal branch one end end points and the first metal branch homonymy end points are interconnected to form Si metal branch, described Si metal branch is perpendicular to the first metal branch and the second metal branch, the second metal branch other end end points and San metal branch homonymy end points are interconnected to form five metals and belong to branch, and described five metals belongs to branch perpendicular to the second metal branch and San metal branch; Described the second basic structure obtains as point of rotation clockwise direction half-twist for the first basic structure being take to the second metal branch central point.
Further, described the first metal branch is identical with San metal branch live width, and it is identical that described Si metal branch and five metals belong to branch's live width.
Further, described the first metal branch line is wider than Si metal branch live width, and described the 4th metal branch line is wider than the second metal branch live width.
Further, described the first metal branch length is 10 to 13 millimeters, and the first metal branch live width is 1.5 to 2.0 millimeters; Described the second metal branch live width is 0.8 to 1.2 millimeter, and described the 4th metal branch length is 8 to 9 millimeters, and described Si metal branch live width is 1.3 to 1.5 millimeters.
The present invention also proposes a kind of super plate of material, and described super plate of material comprises one or more layers base material, and the cycle is placed with the first micro-structural and the second micro-structural to every layer of relative both side surface of base material respectively; Described the first micro-structural is above-mentioned micro-structural, and described the second micro-structural becomes mirror image symmetrical with the first micro-structural.
Further, the dielectric constant of described base material when 10GHZ is 4.0 to 5.0.
Further, described base material is FR-4 material, F4B material, PS material or ceramic material.
The present invention also provides a kind of antenna system, and it comprises feed and is arranged at the above-mentioned super plate of material on described feed electromagnetic radiation wave path.
Further, described feed is paster antenna, microstrip antenna or horn antenna.
Further, described super plate of material comprises 8 layers of base material, and the vertical range of described super plate of material and described feed is 9 to 11 millimeters.
The present invention surpasses micro-structural topology and/or the size of material by design, make feed in antenna system without the gain of making any change and can strengthen feed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the super material elementary cell of existing formation;
Fig. 2 is the topological structure of micro-structural of the present invention and the schematic diagram that micro-structural is decomposed into the first basic structure and the second basic structure;
Fig. 3 is the structural representation that in the super plate of material of the present invention, the first micro-structural cycle arranged;
Fig. 4 is the structural representation that in the super plate of material of the present invention, the second micro-structural cycle arranged;
When Fig. 5 is the additional super plate of material of paster antenna, phi is the simulation result schematic diagram of 0 °;
When Fig. 6 is the additional super plate of material of paster antenna, phi is the simulation result schematic diagram of 90 °;
When Fig. 7 is the additional super plate of material of paster antenna, phi is the simulation result schematic diagram of 0 °;
When Fig. 8 is the additional super plate of material of paster antenna, phi is the simulation result schematic diagram of 90 °.
Embodiment
Please refer to Fig. 2, the topological structure that Fig. 2 is micro-structural of the present invention and micro-structural are decomposed into the schematic diagram of the first basic structure and the second basic structure.In Fig. 2, micro-structural of the present invention consists of the first basic structure 10 and the second basic structure 20.The first basic structure 10 comprises and equidistantly be arrangeding in parallel and the first metal branch 11, the second metal branch 12, San metal branch 13 equal in length; Second metal branch 12 one end end points and the first metal branch homonymy end points are interconnected to form Si metal branch 14, and Si metal branch 14 is respectively perpendicular to the first metal branch 11 and the second metal branch 12; The second metal branch 12 other end end points and San metal branch homonymy end points are interconnected to form five metals and belong to branch 15, and five metals belongs to branch 15 respectively perpendicular to the second metal branch 12 and San metal branch 13.
The second basic structure 20 is to obtain as point of rotation clockwise direction half-twist by the first basic structure being take to the second metal branch 12 central points.Due to the special shape of the first basic structure 20, the second basic structure 20 take the second metal branch 12 central points as the point of rotation counterclockwise half-twist also can obtain the second identical basic structure 20.
Special shape due to the first basic structure 10 and the second basic structure 20, the micro-structural consisting of the first basic structure 10 and the second basic structure 20 be take its central point as the point of rotation, and the new topological pattern along clockwise direction or counterclockwise obtaining after half-twist overlaps with former topological pattern.The micro-structural with this class feature is isotropic microstructures, and isotropic microstructures all has identical electromagnetic response to the electromagnetic wave of all directions incident, can simplified design and raising range of application.
Preferably, the first metal branch 11 and San metal branch 13 have identical live width, and Si metal branch 14 and five metals belong to branch 15 and have identical live width.The first metal branch 11 live widths are greater than Si metal branch 14 live widths, and Si metal branch 14 live widths are greater than the second metal branch 12 live widths.
More preferably, the first metal branch 11 length are 10 to 13 millimeters, and the first metal branch 11 live widths are 1.5 to 2.0 millimeters; The second metal branch 12 live widths are 0.8 to 1.2 millimeter, and Si metal branch 14 length are 8 to 9 millimeters, and Si metal branch 14 live widths are 1.3 to 1.5 millimeters.
It is different and different that the live width of each strip metal branch and length respond electromagnetic frequency according to it, and for example, when its response wave frequency is higher, electromagnetic wavelength is longer, and correspondingly, each strip metal branch length is longer; When its response wave frequency is lower, electromagnetic wavelength is shorter, and correspondingly, each strip metal branch length is shorter.
The present invention also provides a kind of super plate of material, and described super plate of material comprises one or more layers base material, and the cycle is placed with the first micro-structural and the second micro-structural to every layer of relative both side surface of base material respectively.The first micro-structural is the micro-structural shown in Fig. 2, and the second micro-structural becomes mirror image symmetrical with the first micro-structural.Please refer to Fig. 3 and Fig. 4, Fig. 3 is the structural representation that the first micro-structural cycle arranged, and Fig. 4 is the structural representation of arranging in the second micro-structural cycle.
The material of the first micro-structural and the second micro-structural can be all kinds of conducting metals such as copper, silver, aluminium.
The dielectric constant of base material when 10GHZ is preferably 4.0 to 5.0.The substrate material that meets above-mentioned dielectric constant requirement can be FR-4 material, F4B material, PS material or ceramic material etc.
The present invention also provides a kind of antenna system, and it comprises feed and is arranged at the above-mentioned super plate of material on feed electromagnetic radiation wave path.Feed can be the device of all kinds of energy such as paster antenna, microstrip antenna, horn antenna radiated electromagnetic wave.In the present embodiment, take paster antenna as example explanation.
Super plate of material in the antenna system of the present embodiment comprises 8 layers of base material of being made by FR-4 material.The thickness of every layer of base material is 0.2 to 0.5 millimeter, and the thickness of the first micro-structural and the second micro-structural is 0.01 to 0.02 millimeter.Whole super plate of material thickness is less than 5 millimeters, and very thin thickness, takes up room very little.
Choosing a paster antenna below illustrates and adds the humidification to antenna gain after super plate of material.In the present embodiment, paster antenna volume is 41.95 * 41.95 * 1.96mm, and dead ahead circle paster circumference is 12.87mm, and radiated electromagnetic wave frequency is 3.43GHZ.During the additional super plate of material of paster antenna, its positive gain maximum of utilizing the emulation of CST simulation software to obtain is not 3.58dB, and paster antenna during additional super plate of material its phi be that the polar of 0 ° and 90 ° schemes to distinguish as shown in Figure 5, Figure 6.As can be seen from Figure 5, when paster antenna does not add super plate of material, half-power bandwidth when phi is 0 ° is 80.4 °, and as can be seen from Figure 6, when paster antenna does not add super plate of material, half-power bandwidth when phi is 90 ° is 99.9 °.
On paster antenna electromagnetic radiation wave path, add above-mentioned super plate of material, preferably, the vertical range of super plate of material and paster antenna is 9 to 11 millimeters.Now, the positive gain maximum of utilizing CST simulation software emulation electromagnetic wave to see through after super plate of material is 5.47dB.Electromagnetic wave sees through after super plate of material, phi be 0 ° and 90 ° polar figure respectively as shown in Figure 7, Figure 8, as can be seen from Figure 7, after the additional super plate of material of paster antenna, half-power bandwidth when phi is 0 ° is 64.8 °, as can be seen from Figure 8, when paster antenna does not add super plate of material, half-power bandwidth when phi is 90 ° is 76.3 °.
From above-mentioned the simulation results, after additional super plate of material, the gain performance of paster antenna and half-power bandwidth performance are all well improved, and without paster antenna being made to any change.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.
Claims (10)
1. a micro-structural, is characterized in that: described micro-structural topology pattern be take its central point as the point of rotation, and the new topological pattern along clockwise direction or counterclockwise obtaining after half-twist overlaps with former topological pattern; Described micro-structural comprises the first basic structure and the second basic structure, and described the first basic structure comprises and equidistantly be arrangeding in parallel and the first metal branch, the second metal branch and San metal branch equal in length; Second metal branch one end end points and the first metal branch homonymy end points are interconnected to form Si metal branch, described Si metal branch is perpendicular to the first metal branch and the second metal branch, the second metal branch other end end points and San metal branch homonymy end points are interconnected to form five metals and belong to branch, and described five metals belongs to branch perpendicular to the second metal branch and San metal branch; Described the second basic structure obtains as point of rotation clockwise direction half-twist for the first basic structure being take to the second metal branch central point.
2. micro-structural as claimed in claim 1, is characterized in that: described the first metal branch is identical with San metal branch live width, and it is identical that described Si metal branch and five metals belong to branch's live width.
3. micro-structural as claimed in claim 2, is characterized in that: described the first metal branch line is wider than Si metal branch live width, and described the 4th metal branch line is wider than the second metal branch live width.
4. micro-structural as claimed in claim 3, is characterized in that: described the first metal branch length is 10 to 13 millimeters, and the first metal branch live width is 1.5 to 2.0 millimeters; Described the second metal branch live width is 0.8 to 1.2 millimeter, and described the 4th metal branch length is 8 to 9 millimeters, and described Si metal branch live width is 1.3 to 1.5 millimeters.
5. a super plate of material, is characterized in that: described super plate of material comprises one or more layers base material, and the cycle is placed with the first micro-structural and the second micro-structural to every layer of relative both side surface of base material respectively; Described the first micro-structural is that claim 1 is to the micro-structural described in claim 4 any one; Described the second micro-structural becomes mirror image symmetrical with the first micro-structural.
6. super plate of material as claimed in claim 5, is characterized in that: the dielectric constant of described base material when 10GHZ is 4.0 to 5.0.
7. super plate of material as claimed in claim 6, is characterized in that: described base material is FR-4 material, F4B material, PS material or ceramic material.
8. an antenna system, is characterized in that: comprise feed and super plate of material as claimed in claim 5, described super plate of material is arranged on described feed electromagnetic radiation wave path.
9. antenna system as claimed in claim 8, is characterized in that: described feed is paster antenna, microstrip antenna or horn antenna.
10. antenna system as claimed in claim 8, is characterized in that: described super plate of material comprises 8 layers of base material, and the vertical range of described super plate of material and described feed is 9 to 11 millimeters.
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| CN201210316736.0A CN103682655B (en) | 2012-08-31 | 2012-08-31 | Micro-structural, metamaterial board and antenna system |
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| CN104953293A (en) * | 2015-06-30 | 2015-09-30 | 桂林电子科技大学 | Circularly-polarized horn antenna based on C waveband |
| CN105161857A (en) * | 2015-08-03 | 2015-12-16 | 欧阳征标 | Meta-material film for left-hand circular polarization conversion |
| CN107946762A (en) * | 2017-11-15 | 2018-04-20 | 哈尔滨工业大学 | X-band based on C-type clamp layer radome wall construction minimizes high wave transparent FSS |
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