CN102810746B - Wideband artificial electromagnetic material - Google Patents
Wideband artificial electromagnetic material Download PDFInfo
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- CN102810746B CN102810746B CN201110145120.7A CN201110145120A CN102810746B CN 102810746 B CN102810746 B CN 102810746B CN 201110145120 A CN201110145120 A CN 201110145120A CN 102810746 B CN102810746 B CN 102810746B
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Abstract
The invention relates to a wideband artificial electromagnetic material, comprising a plurality of square material units arranged along x, y and z directional arrays, every two of which are orthogonally perpendicular to each other, wherein each material unit comprises a nonmetal square base material unit and artificial micro-structures attached to the surface of the base material unit. Each artificial micro-structure comprises a plurality of same structure units which are parallel to each other, wherein the plurality of the structure unit have the same first geometrical pattern, are not intersected with each other and are sequentially arranged along a second geometrical pattern which is similar to but larger than the first geometrical pattern. According to the invention, one artificial micro-structure is formed by the plurality of the structure units, thereby reducing the formed equivalent capacitance and inductance. Therefore, the resonant frequency is shifted backwards, and the available frequency band becomes wide. As a result, the application range of the material becomes wider.
Description
Technical field
The present invention relates to a kind of artificial electromagnetic material, more particularly, relate to a kind of broadband artificial electromagnetic material.
Background technology
Artificial electromagnetic material, is commonly called as Meta Materials, is a kind of novel artificial synthetic material that can produce response to electromagnetism, is made up of substrate and the man-made microstructure be attached on substrate.What be generally that metal wire is arranged into due to man-made microstructure has certain geometric structure, therefore, it is possible to produce response to electromagnetism, thus making Meta Materials entirety embody the electromagnetic property being different from substrate, such as DIELECTRIC CONSTANT ε is different with magnetic permeability μ, according to refractive index formula
known, refractive index n is also different.
Existing artificial electromagnetic material, its man-made microstructure is generally the shape such as " work " font, " Qian " font, and available band is narrower.For the applying frequency that some are wider, need to design new man-made microstructure.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, designs new man-made microstructure thus realizes a kind of broadband artificial electromagnetic material.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of broadband artificial electromagnetic material, comprise along the vertical x of pairwise orthogonal, the multiple square material cell of y and z direction array arrangement, each material cell comprises nonmetallic square substrates unit and is attached to the man-made microstructure on described base material cell surface, each described man-made microstructure comprises multiple identical and construction unit be parallel to each other, each construction unit has the first same geometrical pattern, described multiple construction unit mutually disjoints, and along one similar in appearance to and the second pattern being greater than described first geometrical pattern arrange successively.
In broadband artificial electromagnetic material of the present invention, each square base material unit its be all not more than 1/10th of an incident electromagnetic wave wavelength along the length on x, y and z direction.
In broadband artificial electromagnetic material of the present invention, the first geometrical pattern of described construction unit is " work " font, and the second geometrical pattern that the outline line of described multiple construction unit is formed is " work " font being greater than the first geometrical pattern.
In broadband artificial electromagnetic material of the present invention, the height of described " work " font first geometrical pattern equals wherein two levels of described " work " font second geometrical pattern and the live width of parallel line segment.
In broadband artificial electromagnetic material of the present invention, the width of described " work " font first geometrical pattern equals the live width of a wherein vertical line segment of described " work " font second geometrical pattern.
In broadband artificial electromagnetic material of the present invention, first, second geometrical pattern described is two similar " ten " fonts.
In broadband artificial electromagnetic material of the present invention, the construction unit of described man-made microstructure is made up of metal wire.
In broadband artificial electromagnetic material of the present invention, described metal wire is copper cash or silver-colored line.
In broadband artificial electromagnetic material of the present invention, described artificial electromagnetic material comprises multi-disc base material lamella stacking in the z-direction, and each base material lamella comprises the base material unit along x, y direction array arrangement.
In broadband artificial electromagnetic material of the present invention, described base material lamella is made up of FR-4 material.
Implement broadband artificial electromagnetic material of the present invention, there is following beneficial effect: in the present invention, form a man-made microstructure with multiple construction unit, compared with the man-made microstructure formed with the single structure unit of same size, the equivalent capacity that man-made microstructure of the present invention is formed and inductance reduce, thus move after making resonance frequency, available band broadens, and makes the range of application of material become wide.
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 broadband artificial electromagnetic material of the present invention;
Fig. 2 is the structural representation of a material cell of broadband artificial electromagnetic material as shown in Figure 1;
Fig. 3 is the first geometrical pattern of man-made microstructure in the material cell shown in Fig. 2 and the comparison diagram of the second geometrical pattern.
Embodiment
The invention provides a kind of broadband artificial electromagnetic material, as shown in Figure 1, it comprises the base material 1 of at least one piece of even uniform thickness to its structure, and when base material 1 has multi-disc, they are laminated to together along the z direction perpendicular to substrate surface.Base material 1 can be virtually divided into identical multiple cube shaped base material unit 10, the such as length of side be a kind of electromagnetic wavelength of frequency 1/10th or be less than 1/10th cube.More substrates 1 can regard as by multiple such base material unit 2 with x direction be row, y direction is row, the array that forms for stacked direction of z direction, wherein x, y, z direction pairwise orthogonal is vertical.Base material 1 can be made up of materials such as FR-4 material, epoxy resin, potteries.
Each base material unit 10 is attached with a man-made microstructure 200, man-made microstructure 200 on base material unit 10 and base material unit 10 forms a material cell 30 jointly, as shown in Figure 2, then broadband artificial electromagnetic material of the present invention can be regarded as and formed along x, y, z three direction array arrangements by multiple material cell 30.
Man-made microstructure 200 be generally metal wire such as copper cash, silver-colored line composition there is certain geometric plane or stereochemical structure, certainly, man-made microstructure can also have other metal materials as gold thread, also can, by the material of at least two kinds of metal mixed, nonmetallic materials even also may be adopted to make.
Man-made microstructure 200 of the present invention, comprise multiple identical and construction unit 201 be parallel to each other, each construction unit has the first identical geometrical pattern P1, " work " font such as shown in Fig. 2, Fig. 3, multiple construction unit is parallel to each other and mutually disjoints, and they are arranged in order along another larger " work " font, and this larger " work " font is the second geometrical pattern P2, little " work " font geometric similarity of itself and each construction unit, and be greater than little " work " font.
Construction unit is arranged successively along the second geometrical pattern P2, refer to that construction unit to drop on the second geometrical pattern and to be covered with make can not put into another construction unit again in the gap between adjacent two construction units, the pattern that also namely the outer contour of all first geometrical pattern P1 is formed by connecting is the second geometrical pattern P2.Such as, as shown in Figure 3, the width of " work " font second geometrical pattern P2 also namely the line length of its two horizontal line sections be parallel to each other be w, live width is a, the line length of middle vertical line segment is h, live width is b, and " work " font first geometrical pattern P1 that construction unit 201 is formed, the line length of its two horizontal line sections also namely the width of the first geometrical pattern P1 be w0, whole height is h0, then have w0=b, h0=a, two geometrical pattern geometric similarities refer to w:(2a+h)=w0:h0.It should be understood that basic simlarity and do not get equal sign completely and also can reach effect of the present invention, therefore this situation also counts within scope.
Certainly, first, second geometrical pattern P1, P2 of the present invention are not limited in " work " font, and it can be the geometrical pattern be made up of metal wire arbitrarily, such as " ten " font, circle, snowflake shape, fork-shaped etc.
The present invention emulates the material cell 30 shown in Fig. 2, wherein, base material cell size is 4mm × 4mm × 4mm, base material material is FR-4 material, man-made microstructure is copper cash, and the geomery of the second geometrical pattern P2 that man-made microstructure 200 of the present invention forms is: w=3mm, a=h0=0.5mm, b=w0=0.4mm, h=2.5mm.
By emulation, record the artificial electromagnetic material that material cell 30 shown in Fig. 2 is formed, compared with the man-made microstructure formed with by the single structure unit of same size, move after its electromagnetic response curve resonance peak.Therefore, adopt man-made microstructure 200 of the present invention, the working band of material is widened greatly.
This is because, in artificial electromagnetic material, " work " character form structure is equivalent to the series connection of an electric capacity and an inductance in circuit, the man-made microstructure supposing to have the second geometrical pattern P2 is electric capacity and inductance C1, L1 series connection, the equivalent capacity of each construction unit 201 and inductance are C2, L2 series connection, and obviously C1, L1 and C2, L2 are much bigger respectively.In man-made microstructure shown in Fig. 2, above a line to be equivalent to 9 construction units 201 in parallel, after in parallel, capacitance is 9C2, below a line in like manner capacitance also be 9C2,4 construction units 201 in centre are connected, and capacitance is
c2, then the equivalent capacity of the man-made microstructure 200 having multiple construction unit 201 to form is
be less than C2 value.Equally, its equivalent inductance L1 of man-made microstructure 200 that also can obtain multiple construction unit 201 formation is also greater than L2 value.
According to formula
known, its equivalent capacitance value L of man-made microstructure 200, the inductance value C that are made up of multiple construction unit will much smaller than capacitance C1, the inductance value L1 of the man-made microstructure 2 of prior art, thus its resonance frequency f
0will much larger than the resonance frequency of existing man-made microstructure 2, also namely resonance frequency is moved relative to after prior art, thus available band is broadened.
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 (10)
1. a broadband artificial electromagnetic material, comprise along the vertical x of pairwise orthogonal, the multiple square material cell of y and z direction array arrangement, each material cell comprises nonmetallic square substrates unit and is attached to the man-made microstructure on described base material cell surface, it is characterized in that, each described man-made microstructure comprises multiple identical and construction unit be parallel to each other, each construction unit has shape first geometrical pattern all identical with size, described multiple construction unit mutually disjoints and spaced, and along one similar in appearance to and the second geometrical pattern being greater than described first geometrical pattern arrange successively.
2. broadband artificial electromagnetic material according to claim 1, is characterized in that, each square base material unit its be all not more than 1/10th of an incident electromagnetic wave wavelength along the length on x, y and z direction.
3. broadband artificial electromagnetic material according to claim 1, it is characterized in that, first geometrical pattern of described construction unit is " work " font, and the second geometrical pattern that the outline line of described multiple construction unit is formed is " work " font being greater than the first geometrical pattern.
4. broadband artificial electromagnetic material according to claim 3, is characterized in that, the height of described " work " font first geometrical pattern equals wherein two levels of described " work " font second geometrical pattern and the live width of parallel line segment.
5. broadband artificial electromagnetic material according to claim 4, is characterized in that, the width of described " work " font first geometrical pattern equals the live width of a wherein vertical line segment of described " work " font second geometrical pattern.
6. broadband artificial electromagnetic material according to claim 1, is characterized in that, first, second geometrical pattern described is two similar " ten " fonts.
7. broadband artificial electromagnetic material according to claim 1, is characterized in that, the construction unit of described man-made microstructure is made up of metal wire.
8. broadband artificial electromagnetic material according to claim 7, is characterized in that, described metal wire is copper cash or silver-colored line.
9. broadband artificial electromagnetic material according to claim 1, is characterized in that, described artificial electromagnetic material comprises multi-disc base material lamella stacking in the z-direction, and each base material lamella comprises the base material unit along x, y direction array arrangement.
10. broadband artificial electromagnetic material according to claim 9, is characterized in that, described base material lamella is made up of FR-4 material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110145120.7A CN102810746B (en) | 2011-06-01 | 2011-06-01 | Wideband artificial electromagnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110145120.7A CN102810746B (en) | 2011-06-01 | 2011-06-01 | Wideband artificial electromagnetic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102810746A CN102810746A (en) | 2012-12-05 |
| CN102810746B true CN102810746B (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110145120.7A Active CN102810746B (en) | 2011-06-01 | 2011-06-01 | Wideband artificial electromagnetic material |
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|---|---|
| CN (1) | CN102810746B (en) |
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2011
- 2011-06-01 CN CN201110145120.7A patent/CN102810746B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| Metamaterials Theory,Design,and Applications;Tie Jun Cui等;《Springer》;20101231;第225-228页 * |
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| CN102810746A (en) | 2012-12-05 |
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