CN103036033B - Special-shaped artificial electromagnetic material - Google Patents
Special-shaped artificial electromagnetic material Download PDFInfo
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- CN103036033B CN103036033B CN201110163876.4A CN201110163876A CN103036033B CN 103036033 B CN103036033 B CN 103036033B CN 201110163876 A CN201110163876 A CN 201110163876A CN 103036033 B CN103036033 B CN 103036033B
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Abstract
The invention relates to a special-shaped artificial electromagnetic material which comprises substrates and a plurality of artificial microstructures attached to the substrates. By means of distribution of the artificial microstructures, the substrates are virtually divided into a plurality of same substrate units, at least one artificial microstructure is attached to each substrate unit, and the substrate units are polygon prisms. The polygon prisms are used as shapes of the substrate units to divide each substrate so that the substrates are fully divided, designing and simulation are simultaneously facilitated, and a scraggly curved surface formed by connecting the outermost ring of outer polygon prism contours can fit the non-square-shaped special-shaped artificial electromagnetic material with a coarse surface or the zigzag special-shaped artificial electromagnetic material. Accordingly, designing and simulation processes are simplified, and the development cycle is shortened.
Description
Technical field
The present invention relates to a kind of artificial electromagnetic material, more particularly, relate to a kind of special-shaped artificial electromagnetic material.
Background technology
Artificial electromagnetic material (Metamaterial), also known as Meta Materials, is a kind of novel artificial synthetic material, be the base material be made up of nonmetallic materials and attachment on substrate surface or the multiple metal micro structures being embedded in base material inside form.Metal micro structure is the certain geometric cylindrical or flat wire of composition, such as, form the wire etc. of annular, I shape.Each metal micro structure and attachment thereof or the part thereof occupied form a material cell, namely whole Meta Materials is made up of hundreds thousand of, 1,000,000 even more than one hundred million such unit, just as crystal is made up of according to certain arrangement countless lattices, namely each lattice is equivalent to the unit of above-mentioned metal micro structure and base material formation.
Due to the existence of metal micro structure, each above-mentioned material whole unit has an equivalent dielectric constant and magnetic permeability, and the Meta Materials that therefore all unit are formed presents special response characteristic to Electric and magnetic fields; Meanwhile, different concrete structures and shape are designed to metal micro structure, dielectric constant and the magnetic permeability of its unit can be changed, and then change the response characteristic of whole Meta Materials.
The Meta Materials of prior art, be all formed by blocks of substrate combination usually, every plate substrate is generally rectangle or square sheets, and its flush edge, cutting is neat.Therefore, when designing each metal micro structure, usually each substrate sheets is divided into the identical little square block of multiple array arrangement, each little square block is a base material unit, and the limit of base material unit respectively with the length or wide parallel of substrate sheets, thus base material is fully divided.
But, under the application scenario that some are special, may require that base material is not the square material such as regular rectangle or square, its surface may be rough and uneven in surface, base material is divided with square, in the convexconcave part on surface can not being divided in, then this part needs to consider separately and design its man-made microstructure, adds the difficulty of design.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of special-shaped artificial electromagnetic material being convenient to design, enhance productivity.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of special-shaped artificial electromagnetic material, comprise base material and be attached to the multiple man-made microstructure on base material, after described man-made microstructure distribution makes base material be divided into multiple identical base material unit virtually, each base material unit is attached with at least one man-made microstructure, described base material unit is polygon-prism.
In special-shaped artificial electromagnetic material of the present invention, described base material unit is regular polygon prism.
In special-shaped artificial electromagnetic material of the present invention, described base material unit is regular cube, and described substrate surface direction is not parallel to arbitrary limit of described regular cube.
In special-shaped artificial electromagnetic material of the present invention, described base material unit is regular hexagon prism.
In special-shaped artificial electromagnetic material of the present invention, described base material unit is regular triangular prism.
In special-shaped artificial electromagnetic material of the present invention, described man-made microstructure is 90-degree rotation symmetrical structure.
In special-shaped artificial electromagnetic material of the present invention, described man-made microstructure is rotation 60 degree of symmetrical structures.
In special-shaped artificial electromagnetic material of the present invention, described man-made microstructure is rotation 120 degree of symmetrical structures.
In special-shaped artificial electromagnetic material of the present invention, described man-made microstructure is the geometrical pattern be made up of copper cash or silver-colored line.
In special-shaped artificial electromagnetic material of the present invention, the equivalent diameter of described polygon-prism is less than 1/10th of the wavelength of the incident electromagnetic wave that described special-shaped artificial electromagnetic material will respond.
Implement special-shaped artificial electromagnetic material of the present invention, there is following beneficial effect: divide each base material with polygon-prism as the shape of base material unit, base material is made fully to be divided so that while designing and emulating, the scraggly curved surface that an outermost circle polygon-prism outline is linked to be can the non-box-shaped of matching, the special-shaped artificial electromagnetic material of rough surface or toothing, be beneficial to again simplified design and simulation process, shorten the R&D cycle.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the artificial electromagnetic material of prior art;
Fig. 2 is the structural representation of the special-shaped artificial electromagnetic material of first embodiment of the invention;
Fig. 3 is the structural representation of the special-shaped artificial electromagnetic material of second embodiment of the invention;
Fig. 4 is the structural representation of a material cell in special-shaped artificial electromagnetic material shown in Fig. 3;
Fig. 5 is the structural representation of the special-shaped artificial electromagnetic material of third embodiment of the invention;
Fig. 6 is the structural representation of a material cell in special-shaped artificial electromagnetic material shown in Fig. 5.
Embodiment
The present invention relates to the irregular artificial electromagnetic material of a kind of surface configuration, is also special-shaped artificial electromagnetic material.Due to when design artificial electromagnetic material, need the shape presetting material cell, then whole substrate is divided into one by one virtually the identical base material unit of shape with it, design shape, the size of man-made microstructure accompanying on each base material unit, thus the electromagnetic response characteristic of a material cell that the base material unit that analog simulation goes out this man-made microstructure and attachment thereof is formed jointly, finally by the property fitting of all material cell to there is required feature, thus make whole material finally reach specific function.
Existing splitting scheme is all adopt cube shaped base material unit usually, and as shown in Figure 1, base material unit 10 is along three orthogonal direction arrays corresponding to cubical three orthogonal limits.The base material 1 obtained like this is cube or rectangular sheet structure or block structure, its surfacing.When substrate surface is coarse, engrail or rough and uneven in surface time, this part matsurface then can not divide with above-mentioned unified base material unit, needs to design another splitting scheme, and emulate its electromagnetic response characteristic separately, then consider which kind of its electromagnetic parameter has affect on the material behavior of entirety and function.
Obviously, can the design cycle be extended like this, increase design difficulty.The inventive point that the present invention addresses this problem is, adopts polygon-prism to carry out the shape of alternative traditional cube as base material unit.Certainly, polygon-prism be comprise cubical, but the cube be applicable to herein when cube of the present invention only refers to that its array direction is not parallel to two the orthogonal limits be positioned in this array plane, as shown in Figure 2, artificial electromagnetic material has two plate substrates 1, and be stacked to together in the z-direction, every plate substrate 1 is divided into identical cube base material unit 10, these base material unit 10 with y direction for row, x direction is column array, and the gap location between every two row base material unit 10 to be also formed as a line onesize, cube base material unit staggered with it.The limit of each base material unit 10 of a base material cell array in XY array plane all becomes 45 degree or 135 degree with X-direction or Y-direction, instead of is parallel or perpendicular to X, Y-direction, and the direction of substrate surface then extends along X, Y, Z-direction.
Adopt such base material unit 10, the rough surface of the special-shaped artificial electromagnetic material required for matching can be carried out with the serrated-surface that the edge spike of a cycle basis material unit 10 at edge is linked to be, base material can all be divided with same base material unit, when designing artificial electromagnetic material without the need to the electromagnetic response characteristic on the rough surface of other project navigator abnormity artificial electromagnetic material, thus shorten the design cycle.
Because the base material unit 10 of the present embodiment is cube shaped, man-made microstructure 2 can be designed to 90-degree rotation symmetrical structure, namely with one perpendicular to the axle of this structure for rotating shaft, after any 90-degree rotation, its structure overlaps with original structure, then this structure is 90-degree rotation symmetrical structure.Adopt such structure, can make whole artificial electromagnetic material, any 90-degree rotation all has identical electromagnetic property with the material of reference azimuth.
For different rough surface shapes, different polygon-prism can be designed and carry out matching, as far as possible accurately to reach the convex-concave effect of rough surface.
Such as, for the substrate shapes shown in Fig. 3, can divide with the base material cell configuration shown in Fig. 4 and positive six prisms, base material can be divided with six prisms completely and irredundant, and each base material unit 10 be provided with man-made microstructure 2.
Equally, for regular hexagon prism, in order to the electromagnetic response realized on six direction is all identical, base material can be placed and realize identical electromagnetic response function by any direction, man-made microstructure 2 on its base material unit 10 is preferably rotation 60 degree of symmetrical structures, namely this structure with perpendicular to this man-made microstructure a straight line for rotating shaft rotate arbitrarily 60 degree after overlap with original structure.
It is way of realization that such man-made microstructure 2 has multiple, the structure that such as, shown in Fig. 4 six identical helixes are formed, and also can be the snowflake shape symmetrical structure shown in Fig. 5, Fig. 6.
Certainly, polygon-prism also has a variety of shape except cube, regular hexagon prism, such as, can also be regular triangular prism, and corresponding man-made microstructure can be designed to rotation 120 degree of symmetrical structures; Base material unit, except regular polygon prism, can also be irregular polygon prism, as long as can guarantee that base material can divide completely and can not be divided without rest by identical polygon-prism, such polygon-prism is all applicable in the present invention.
It should be noted that, the size of base material unit is limited, traditional cube shaped base material unit, and its length of side is less than the wavelength of the incident electromagnetic wave that will respond, usually within 1/10th of its wavelength.Equally, adopt polygon-prism to carry out the cube of alternative traditional form in the present invention, but its size still needs in effective range, namely its equivalent diameter must be less than the wavelength of the incident electromagnetic wave that will respond, and is preferably less than 1/10th of this wavelength.Here equivalent diameter, refers to the value that the polygonal area of polygon-prism obtains divided by self girth.
The materials such as polytetrafluoroethylene, epoxy resin, pottery selected usually by base material of the present invention, man-made microstructure is the geometrical pattern be made up of copper cash or silver-colored line, these copper cash or silver-colored line normally by the method for coating after etching, can certainly be attached on substrate surface by other techniques.
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; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (4)
1. a special-shaped artificial electromagnetic material, comprise base material and be attached to the multiple man-made microstructure on base material, after described man-made microstructure distribution makes base material be divided into multiple identical base material unit virtually, each base material unit is attached with at least one man-made microstructure, it is characterized in that, described base material unit is regular polygon prism;
When described base material unit is regular cube, the limit of each base material unit of a base material cell array in XY array plane is all not parallel or perpendicular to X, Y-direction;
When described base material unit is regular hexagon prism, described man-made microstructure is rotation 60 degree of symmetrical structures; When described base material unit is regular triangular prism, described man-made microstructure is rotation 120 degree of symmetrical structures.
2. special-shaped artificial electromagnetic material according to claim 1, is characterized in that, when described base material unit is regular cube, described man-made microstructure is 90-degree rotation symmetrical structure.
3. special-shaped artificial electromagnetic material according to claim 1, is characterized in that, described man-made microstructure is the geometrical pattern be made up of copper cash or silver-colored line.
4. special-shaped artificial electromagnetic material according to claim 1, is characterized in that, the equivalent diameter of described regular polygon prism is less than 1/10th of the wavelength of the incident electromagnetic wave that described special-shaped artificial electromagnetic material will respond; Described equivalent diameter, refers to the value that the polygonal area of regular polygon prism obtains divided by self girth.
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| CN201110163876.4A CN103036033B (en) | 2011-06-17 | 2011-06-17 | Special-shaped artificial electromagnetic material |
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| CN201110163876.4A CN103036033B (en) | 2011-06-17 | 2011-06-17 | Special-shaped artificial electromagnetic material |
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| CN103036033A CN103036033A (en) | 2013-04-10 |
| CN103036033B true CN103036033B (en) | 2015-05-20 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431171A (en) * | 2008-12-12 | 2009-05-13 | 东南大学 | Polarization conversion method and polarization converter based on artificial electromagnetic material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431171A (en) * | 2008-12-12 | 2009-05-13 | 东南大学 | Polarization conversion method and polarization converter based on artificial electromagnetic material |
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