CN102956941A - Metamaterial-based microstrip line - Google Patents
Metamaterial-based microstrip line Download PDFInfo
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- CN102956941A CN102956941A CN2011102545748A CN201110254574A CN102956941A CN 102956941 A CN102956941 A CN 102956941A CN 2011102545748 A CN2011102545748 A CN 2011102545748A CN 201110254574 A CN201110254574 A CN 201110254574A CN 102956941 A CN102956941 A CN 102956941A
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Abstract
The invention relates to a metamaterial-based microstrip line. The microstrip line comprises a metal strip, a dielectric substrate, an earth plate and a metamaterial thin film, wherein the metamaterial thin film and the metal strip are arranged on the same side of the dielectric substrate and cling to the dielectric substrate; the metamaterial thin film covers the metal strip; the earth plate is arranged on the other side of the dielectric substrate; and the dielectric substrate is a metamaterial substrate which comprises a plurality of first metamaterial sheet layers with the same refractive index distribution. The microstrip line has the beneficial effects that leak of the space wave form of the microstrip line is effectively restricted via the metamaterial thin film and the metamaterial substrate and then electromagnetic wave crosstalk between the microstrip lines is greatly reduced.
Description
Technical field
The present invention relates to the microstrip line field, in particular, relate to a kind of microstrip line based on super material.
Background technology
Microstrip line (Microstrip Line) is present hybrid microwave integrated circuit (Hybrid Microwave Integrated Circuits, HMIC) and use maximum a kind of plane transmission lines in the monolithic integrated microwave circuit (Monolithic Mictowave Integrated Circuits, MMIC).On structure, microstrip line is to be placed on the ground plate with the interval much smaller than wavelength by very thin metal tape, separates with medium substrate between metal tape and the ground plate.
The outstanding advantages of microstrip line is that structure is small and exquisite, lightweight, can make complicated microwave circuit in little volume with techniques such as mechanical, photoetching, corrosion, and easily integrated with other microwave device, realization microwave component and system integrated.
Day by day miniaturization along with microwave device and system, at some volume and weight is required harsh occasion, can adopt microstrip transmission line to replace waveguide and consist of microwave circuit and form various complex plane circuit at the same substrate, comprise bridge circuit, matched load, attenuator antenna etc.But adopt microstrip line to transmit same existent defect, i.e. microstrip line loss more greatly, easily leak electromagnetic energy cause crosstalk, Q value is low, be difficult to realize finely tuning, power capacity is little etc.
In using the microstrip line transmission course, the guided electromagnetic wave on the microstrip line axially constantly produces leaky wave to the space radiation energy along microstrip line, and wherein electromagnetic wave leakage has two kinds of forms: surface wave form 2 and space wave form 1, as shown in Figure 1.Known that at present microstrip line exists one to leak main mould at high band, this leaks main mould with the outside leakage electromagnetic wave energy of the form of surface wave; And in low-frequency range, each higher mode of microstrip line is then with the outside leakage electromagnetic wave energy of the form of space wave.No matter be that surface wave leaks or space wave leaks, in integrated circuit, these leaky waves all are harmful to, it not only brings the decline of through-put power, and the energy of its leakage also can be given on every side, and other circuit bring electromagnetic interference problem, thereby so that overall system performance descends, therefore need to suppress it.
In the prior art, mainly adopt at microstrip line and apply enough large thin dielectric layers of one deck dielectric constant for suppressing method that microstrip line master mould leaks; Yet the inhibition for the microstrip line higher mode is leaked does not have any simple effective method.This mainly is owing to microstrip line master mould leaks different the causing of physical mechanism of leaking from higher mode, and the space wave of microstrip line higher mode leaks and almost is difficult to be curbed by complete.
Summary of the invention
The object of the invention is to overcome the defective of the space wave leakage of microstrip line higher mode in the prior art, the microstrip line based on super material is provided, this microstrip line can effectively suppress space wave to be revealed, and solves the problem that electromagnetic wave is crosstalked between the microstrip line.
In order to achieve the above object, the following technical scheme of the present invention's employing:
Microstrip line based on super material, described microstrip line comprises metal tape, medium substrate and ground plate, described microstrip line also comprises super material film, described super material film and metal tape are positioned at a side of described medium substrate, and all be close to described medium substrate, wherein, described super material film covers described metal tape, and described ground plate is positioned at the opposite side of described medium substrate; Described medium substrate is super material substrate, and described super material substrate is comprised of a plurality of sheet of material that the first surpass with identical refraction index profile.
Further, described super material film surpasses the second by a plurality of that sheet of material is stacking to be formed, and a plurality of super sheet of material has identical refraction index profile.
Further, described the first surpass sheet of material and the second surpass sheet of material form by a plurality of super material cell.
Further, described super material cell comprises artificial micro-structural and the unit base material that adheres to for artificial micro-structural.
Further, the described refraction index profile rule that the first surpasses sheet of material is: minimum with the refractive index located under the described metal tape, and increase gradually toward the local refractive index away from described metal tape both sides.
Further, the described refraction index profile rule that the second surpasses sheet of material is: the described refraction index profile that the second surpasses in the sheet of material is uniformly, and the span of its refractive index is: 0～1.
Further, described artificial micro-structural is for to form planar structure or the stereochemical structure that electromagnetic field is had response by at least one one metal wire, and described wire is copper wire or filamentary silver.
Further, described wire is attached on the described unit base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.
Further, described artificial micro-structural be flakes or alabastrine derivative shape any one.
Further, described unit base material is made by ceramic material, epoxy resin, polytetrafluoroethylene, FR-4 composite material or F4B composite material.
The present invention has following beneficial effect with respect to prior art:
1, the present invention adopts super material as medium substrate, by regulating the refraction index profile of super material substrate inside, has effectively suppressed the space wave of microstrip line and has revealed.
2, the variation of the dielectric constant of the present invention by changing super material internal realizes the refractive index that needs in the practical application, and technique is simple, and is easy to batch production.
3, utilize super material as baseplate material, exempted the medium splicing, saved cost.
4, a kind of microstrip line based on super material of the present invention is by arranging the super material film of one deck at medium substrate, and described super material film covering metal band, effectively suppressed the leaky wave of microstrip line space wave form, and the electromagnetic wave that has reduced adjacent microstrip line is crosstalked.
Description of drawings
Fig. 1 is the schematic diagram of microstrip line leaky wave form in the prior art;
Fig. 2 is the structural representation that the present invention is based on the microstrip line of super material;
Fig. 3 is the structural representation of super material substrate of the present invention;
Fig. 4 is super material film structural representation of the present invention;
Fig. 5 is super material cell structural representation of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 2, microstrip line based on super material, described microstrip line comprises metal tape 10, medium substrate 30 and ground plate 20, described microstrip line also comprises super material film 40, described super material film 40 and metal tape 10 are positioned at a side of described medium substrate 30, and all are close to described medium substrate 30, wherein, described super material film 40 covers described metal tape 10, and described ground plate 20 is positioned at the opposite side of described medium substrate 30; Described medium substrate 30 is super material substrate 30, and described super material substrate 30 is comprised of a plurality of sheet of material 301 that the first surpass with identical refraction index profile.
Described super material film 40 the second surpasses sheet of material 401 stacking forming by a plurality of, and a plurality of super sheet of material 401 has identical refraction index profile.
Described the first surpass sheet of material 301 and the second surpass sheet of material 401 form by a plurality of super material cell 50, described super material cell 50 comprises artificial micro-structural 502 and the unit base material 501 that adheres to for artificial micro-structural 502.
The described refraction index profile rule that the first surpasses sheet of material 301 is: minimum with the refractive index located under the described metal tape 10, and increase gradually toward the local refractive index away from described metal tape 10 both sides.
The described refraction index profile that the second surpasses in the sheet of material 401 is uniform, but the refractive index span is between 0 and 1, because this ranges of indices of refraction is to make the medium refraction index scope of invisible clothes, with so super material film covering metal band 10, can effectively suppress the space wave form of microstrip line and reveal, reduce the electromagnetic wave of adjacent microstrip line and crosstalk.In the preferred embodiment of the present invention, the value that the second surpasses the refractive index in the sheet of material 401 is 0.7.
Realize the variation of refractive index shown in Figure 3 for the refractive index that makes super material medium 30 interior each the first surpass sheet of material 301, and make super material film 40 interior each the second surpass the variation that sheet of material 401 realizes refractive index shown in Figure 4, through theoretical and actual proof, can be to the topological structure of described artificial micro-structural 502, physical dimension with and the design that distributes at unit base material 501, unit base material 501 adopts dielectric insulation material to make, can be ceramic material, macromolecular material, ferroelectric material, ferrite material, ferromagnetic materials etc., macromolecular material for example can be, epoxy resin or polytetrafluoroethylene.Artificial micro-structural 502 is for to be attached to the metal wire that response can be arranged electromagnetic wave on the unit base material 501 with certain geometry, metal wire can be that section is the copper cash of cylindric or flat, silver line etc., the general copper that adopts, because copper wire is relatively cheap, certainly the section of metal wire also can be other shapes, metal wire is by etching, electroplate, bore and carve, photoetching, electronics carve or ion quarter etc. technique be attached on the unit base material 501, each super material cell 50 all has an artificial micro-structural 502, each super material cell 50 can produce response to the electromagnetic wave that passes through wherein, thereby affect electromagnetic wave transmission therein, the size of each super material cell 50 depends on the electromagnetic wave of needs response, be generally required response electromagnetic wavelength 1/10th, can not be regarded as in the space continuously otherwise comprise being arranged in that the super material cell 50 of artificial micro-structural 502 forms in the space.
In the selected situation of unit base material 501, by shape, size and the spatial distribution on unit base material 501 thereof of adjusting artificial micro-structural 502, can adjust everywhere effective dielectric constant and equivalent permeability and then the super material of change equivalent refractive index everywhere on the super material.When artificial micro-structural 502 adopted identical geometry, the size of the artificial micro-structural in somewhere was larger, and the effective dielectric constant that then should locate is larger, and refractive index is also larger.
The pattern of the artificial micro-structural 502 that the present embodiment adopts is alabastrine derivative pattern, by Fig. 4 and Fig. 5 as can be known, the size of the artificial micro-structural 502 of flakes can according to concrete should be used for fixed.
Above-described embodiment is the better execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not run counter to change, the modification done under Spirit Essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. based on the microstrip line of super material, described microstrip line comprises metal tape, medium substrate and ground plate, it is characterized in that, described microstrip line also comprises super material film, described super material film and metal tape are positioned at a side of described medium substrate, and all are close to described medium substrate, wherein, described super material film covers described metal tape, and described ground plate is positioned at the opposite side of described medium substrate; Described medium substrate is super material substrate, and described super material substrate is comprised of a plurality of sheet of material that the first surpass with identical refraction index profile.
2. the microstrip line based on super material according to claim 1 is characterized in that, described super material film surpasses the second by a plurality of that sheet of material is stacking to be formed, and a plurality of super sheet of material has identical refraction index profile.
3. the microstrip line based on super material according to claim 1 is characterized in that, described the first surpass sheet of material and the second surpass sheet of material form by a plurality of super material cell.
4. the microstrip line based on super material according to claim 3 is characterized in that, described super material cell comprises artificial micro-structural and the unit base material that adheres to for artificial micro-structural.
5. the microstrip line based on super material according to claim 1, the described refraction index profile rule that the first surpasses sheet of material is: minimum with the refractive index of locating under the described metal tape, and increase gradually toward the local refractive index away from described metal tape both sides.
6. the microstrip line based on super material according to claim 1, the described refraction index profile rule that the second surpasses sheet of material is: the described refraction index profile that the second surpasses in the sheet of material is uniformly, and the span of its refractive index is: 0～1.
7. the microstrip line based on super material according to claim 4 is characterized in that, described artificial micro-structural is for to form planar structure or the stereochemical structure that electromagnetic field is had response by at least one one metal wire, and described wire is copper wire or filamentary silver.
8. the microstrip line based on super material according to claim 7 is characterized in that, described wire is attached on the described unit base material by etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.
9. the microstrip line based on super material according to claim 7 is characterized in that, described artificial micro-structural be flakes or alabastrine derivative shape any one.
10. the microstrip line based on super material according to claim 4 is characterized in that, described unit base material is made by ceramic material, epoxy resin, polytetrafluoroethylene, FR-4 composite material or F4B composite material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110254574.8A CN102956941B (en) | 2011-08-31 | 2011-08-31 | Based on the microstrip line of Meta Materials |
| PCT/CN2012/073680 WO2013029371A1 (en) | 2011-08-31 | 2012-04-09 | Metamaterial-based microstrip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110254574.8A CN102956941B (en) | 2011-08-31 | 2011-08-31 | Based on the microstrip line of Meta Materials |
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| Publication Number | Publication Date |
|---|---|
| CN102956941A true CN102956941A (en) | 2013-03-06 |
| CN102956941B CN102956941B (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110254574.8A Active CN102956941B (en) | 2011-08-31 | 2011-08-31 | Based on the microstrip line of Meta Materials |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090021323A1 (en) * | 2007-07-19 | 2009-01-22 | Brocoli Ltd. | Flat uniform transmission line having electromagnetic shielding function |
| CN101587990A (en) * | 2009-07-01 | 2009-11-25 | 东南大学 | Broad band cylindrical lens antenna based on artificial electromagnetic materials |
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2011
- 2011-08-31 CN CN201110254574.8A patent/CN102956941B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090021323A1 (en) * | 2007-07-19 | 2009-01-22 | Brocoli Ltd. | Flat uniform transmission line having electromagnetic shielding function |
| CN101587990A (en) * | 2009-07-01 | 2009-11-25 | 东南大学 | Broad band cylindrical lens antenna based on artificial electromagnetic materials |
Non-Patent Citations (3)
| Title |
|---|
| KAI-SHYUNG CHEN ET AL: "Microstrip Antenna Gain Enhancement by Metamaterial Radome with More Subwavelength Holes", 《MICROWAVE CONFERENCE》 * |
| KAORU HASHIMOTO ET.AL: "Development of Low Characteristic Impedance Transmission Line for Power Supply", 《VLSI PACKAGING WORKSHOP OF JAPAN,2008. VPWJ2008.IEEE 9TH》 * |
| 周恩: "微带线漏波的利用与抑制", 《中国博士学位论文全文数据库》 * |
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| CN102956941B (en) | 2015-09-16 |
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