CN102593563A - Waveguide device based on metamaterial - Google Patents
Waveguide device based on metamaterial Download PDFInfo
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- CN102593563A CN102593563A CN2012100504536A CN201210050453A CN102593563A CN 102593563 A CN102593563 A CN 102593563A CN 2012100504536 A CN2012100504536 A CN 2012100504536A CN 201210050453 A CN201210050453 A CN 201210050453A CN 102593563 A CN102593563 A CN 102593563A
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Abstract
The invention provides a waveguide device based on a metamaterial. The waveguide device comprises a waveguide tube and a separating piece arranged in the waveguide tube for separating the internal space of the waveguide tube into two segments. The separating piece is made of the metamaterial, and the impedance of the metamaterial is equal to or close to the impedance of the air, and therefore, when an electromagnetic wave enters the separating piece of the metamaterial from the air, the reflection is low, the transmission is high, the interference to an incoming wave is reduced, and an emission source can not be damaged due to the reflection.
Description
Technical field
The present invention relates to electromagnetic wave propagation, more particularly, relate to a kind of waveguide assembly.
Background technology
Waveguide is a kind of important way of electromagnetic wave propagation, in the reality, is meant a kind of waveguide that lets electromagnetic wave carry out efficient propagation.In some application scenario, in order to dwindle the size of waveguide, people fill medium in the waveguide of being everlasting.But after filling medium in the waveguide; Because air and the impedance different (also being that impedance does not match) of filling medium; Thereby the electromagnetic wave that causes in air, propagating runs into when filling medium, can on the filling dielectric surface, reflect, and not only influences propagation efficiency; And reflected wave can also can damage emission source when serious to the interference of original waveform one-tenth.
Summary of the invention
The present invention is directed to above-described technical problem, a kind of waveguide assembly based on ultra material is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of waveguide assembly based on ultra material; Comprise waveguide and be arranged in the said waveguide and the inner space of said waveguide be divided into two sections shim; Said shim is processed by ultra material, and the impedance of said ultra material equals or approach the impedance of air.
Preferably, said shim tilts to place.
Preferably, said shim is positioned over direction with the central shaft of said waveguide and forms a position less than the angle of 90 degree.
Preferably, said shim is vertically placed.
Preferably, said shim is positioned over the vertical position of direction with the central shaft of said waveguide.
Preferably, said ultra material comprises medium substrate and a plurality of artificial micro-structural that is attached to said medium substrate.
Preferably, the side in said shim in the said waveguide is filled water, passes the electromagnetic wave of said shim with absorption.
Preferably, said waveguide is a metal tube.
Preferably, said medium substrate is processed by polytetrafluoroethylene or pottery.
Preferably, said artificial micro-structural is plane with certain topology or the stereochemical structure that is made up of metal wire.
The waveguide assembly that the present invention is based on ultra material has following beneficial effect: be provided with the shim of being processed by ultra material in the said waveguide; Can let the impedance of shim equal or approach the impedance of air; Then when electromagnetic wave during from the said shim based on ultra material of air incident; Reflect little, transmission is many, has reduced the interference to incoming wave, more can be owing to reflection damages emission source.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below.
Fig. 1 is the structural representation of the waveguide assembly based on ultra material of the present invention;
Fig. 2 is the floor map that is used to make the ultra material of shim of the present invention.
The name that each label is corresponding among the figure is called:
9 waveguide assemblies, 10 waveguides, 20 shims, 22 surpass material, 24 medium substrates, 26 artificial micro-structurals, 28 surpass material cell
Embodiment
As shown in Figure 1, be the waveguide assembly 9 based on ultra material provided by the invention, it comprises hollow waveguide 10 and places in the said waveguide 10 and the inner space of said waveguide 10 is divided into two sections shim 20.Generally, said waveguide 10 is a metal tube; And the medium of filling in said shim 20 both sides in the said waveguide 10 is different.In the present embodiment, the sides in said shim 20 in the said waveguide 10 are filled air, and fill water in the opposite side of said shim 20, with as the suction carrier load.Shim 20 shown in Fig. 1 is for tilting to place; Also promptly form an angle less than 90 degree, like this, can increase the contact area of filling medium and said shim 20 with the direction of the central shaft A-A of said waveguide 10; Electromagnetic wave can on bigger area, be propagated, improve propagation efficiency.In fact, said shim 20 also can vertically be placed, like the direction perpendicular to the central shaft A-A of the said waveguide 10 among Fig. 1.
The medium of filling in said shim 20 both sides in the said waveguide 10 is different, and causes reflection of electromagnetic wave thus, mainly is because both impedances are different.
We know that ultra material is that a kind of on medium substrate, periodically the arrangement has the artificial micro-structural of certain geometrical shape such as the artificial composite material that metal micro structure forms.People can utilize geometry and the size of artificial micro-structural and relative dielectric constant and/or the relative permeability that arrangement mode changes ultra material space each point, make its electromagnetic response that produces expection, with the control electromagnetic wave propagation.And the formula of impedance is:
wherein μ is relative permeability, and ε is a relative permeability.It is thus clear that we can make said shim 20 with ultra material, make its impedance equal or approach the impedance of air, like this, can let electromagnetic wave in said shim 20, propagate as in air, propagating, reflect little, transmission is many.
As shown in Figure 2, said shim 20 comprises ultra material 22.Said ultra material 22 comprises medium substrate 24 and attached to a plurality of artificial micro-structural 26 on the medium substrate 24.Generally; With each artificial micro-structural 26 and the medium substrate 24 part people that adhered to thereof for being defined as a ultra material cell 28; And the size of each ultra material cell 28 between the electromagnetic wavelength of required response 1/5th to 1/10th between, and the physical dimension of said artificial micro-structural 26 should belong to the same order of magnitude with the physical dimension of said ultra material cell 28.Said medium substrate 24 can be processed by high molecular polymers such as polytetrafluoroethylene or ceramic material.Plane with certain topology or stereochemical structure that each artificial micro-structural 26 normally is made up of metal wire; And pass through certain processing technique attached on the said medium substrate 24; For example etching, plating, brill quarter, photoetching, electronics are carved, ion quarter etc.; And the cross section of metal wire can be flat or other arbitrary shapes, as cylindric.Artificial micro-structural 26 shown in Fig. 2 is the planar structures that are made up of the metal wire with flat cross section, and is periodic distribution.
In order to reduce the reflection of electromagnetic wave when the said ultra material 22 of incident, will let the impedance of said ultra material 22 approach or equal the impedance of air, also promptly, with the impedance phase coupling of air.We know that the relative dielectric constant ε and the relative permeability μ of air all are slightly larger than 1, and usually approximate value is 1 in the reality, so can be got by formula of impedance, the impedance Z of air is approximately 1.For said ultra material 22; In view of the space each point also is the malleable property of the relative dielectric constant ε and the relative permeability μ of each ultra material cell 28; In the present embodiment; We adopt the physical dimension that roughly is alabastrine artificial micro-structural 26 and passes through to regulate the artificial micro-structural 26 of each ultra material cell 28, so that the relative dielectric constant ε of each ultra material cell 28 and relative permeability μ are equal basically, particularly; We can let the relative dielectric constant ε of each ultra material cell 28 and relative permeability μ be equal to or approach 1, so that the impedance of said ultra material 22 equals or approach the impedance of air.By on can know that because relative dielectric constant ε is lower, we claim that said ultra material 22 is the ultra material of low-k.
Above adjustment process, our computer analog software capable of using such as CST accomplish, and as the adjusting that is the physical dimension of alabastrine artificial micro-structural 26 comprise width and the length size etc. of each bar line; Equal or approach the impedance of air until the impedance that obtains said ultra material 22, also promptly, the impedance of said ultra material 22 and the impedance phase of air coupling; Form " solid-state air "; Like this, electromagnetic wave during from the said shim of processing by ultra material 22 20 of air incident reflection little, and since electromagnetic wave propagate as propagation in air in said based on the shim 20 of ultra material; Loss is little, efficiency of transmission is high, passes through ripple rate height.
Like this; The electromagnetic wave that is sent by emission source (figure do not show) imports in the said waveguide 10 and when arriving said shim 20 based on ultra material; Reflection less, how transmission to pass said shim 20 and be transmitted in the water, and electromagnetic energy is all by the water absorption and be converted into heat, and is hot then can take away through the mode that the hot and cold water in the said waveguide 10 exchanges; Can not become to disturb, more can not damage emission source original waveform.
In addition, said shim 20 also is formed by stacking the said ultra material 22 of multilayer.
The above only is some embodiments of the present invention and/or embodiment, should not be construed as limiting the invention.For those skilled in the art, under the prerequisite that does not break away from basic thought of the present invention, can also make some improvement and retouching, and these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. waveguide assembly based on ultra material; Comprise waveguide and be arranged in the said waveguide and the inner space of said waveguide be divided into two sections shim; It is characterized in that said shim is processed by ultra material, the impedance of said ultra material equals or approaches the impedance of air.
2. the waveguide assembly based on ultra material according to claim 1 is characterized in that, said shim tilts to place.
3. the waveguide assembly based on ultra material according to claim 2 is characterized in that, said shim is positioned over direction with the central shaft of said waveguide and forms a position less than the angle of 90 degree.
4. the waveguide assembly based on ultra material according to claim 1 is characterized in that said shim is vertically placed.
5. the waveguide assembly based on ultra material according to claim 2 is characterized in that, said shim is positioned over the vertical position of direction with the central shaft of said waveguide.
6. the waveguide assembly based on ultra material according to claim 1 is characterized in that, said ultra material comprises medium substrate and a plurality of artificial micro-structural that is attached to said medium substrate.
7. the waveguide assembly based on ultra material according to claim 1 is characterized in that, the side in said shim in the said waveguide is filled water, passes the electromagnetic wave of said shim with absorption.
8. the waveguide assembly based on ultra material according to claim 1 is characterized in that, said waveguide is a metal tube.
9. the waveguide assembly based on ultra material according to claim 1 is characterized in that said medium substrate is processed by polytetrafluoroethylene or pottery.
10. the waveguide assembly based on ultra material according to claim 1 is characterized in that, said artificial micro-structural is plane with certain topology or the stereochemical structure that is made up of metal wire.
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| CN201210050453.6A CN102593563B (en) | 2012-02-29 | 2012-02-29 | Waveguide device based on metamaterial |
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| CN201210050453.6A CN102593563B (en) | 2012-02-29 | 2012-02-29 | Waveguide device based on metamaterial |
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| CN102593563B CN102593563B (en) | 2014-04-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874306A (en) * | 2013-12-19 | 2016-08-17 | Vega格里沙贝两合公司 | Radar-operated level gauge |
| CN106159399A (en) * | 2016-08-26 | 2016-11-23 | 电子科技大学 | A kind of novel winding waveguide |
| CN106159401A (en) * | 2016-08-23 | 2016-11-23 | 孟玲 | Waveguide assembly based on Meta Materials |
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| CN1152804A (en) * | 1995-10-04 | 1997-06-25 | 株式会社村田制作所 | Dielectric waveguide |
| TW200622309A (en) * | 2004-12-31 | 2006-07-01 | Ind Tech Res Inst | A super-resolution optical component and a left-handed material thereof |
| US7474456B2 (en) * | 2007-01-30 | 2009-01-06 | Hewlett-Packard Development Company, L.P. | Controllable composite material |
| US20090197210A1 (en) * | 2008-01-31 | 2009-08-06 | National Taiwan University | Method for preparing photonic crystal slab waveguides |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874306A (en) * | 2013-12-19 | 2016-08-17 | Vega格里沙贝两合公司 | Radar-operated level gauge |
| CN106159401A (en) * | 2016-08-23 | 2016-11-23 | 孟玲 | Waveguide assembly based on Meta Materials |
| CN106159399A (en) * | 2016-08-26 | 2016-11-23 | 电子科技大学 | A kind of novel winding waveguide |
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| CN102593563B (en) | 2014-04-16 |
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Effective date of registration: 20150513 Address after: 518057 Guangdong City, Nanshan District province high tech Zone in the middle of a high tech building, building No. 2, No. 9, building Patentee after: Shenzhen Kuang-Chi Institute of Advanced Technology Address before: 518000 Guangdong city of Shenzhen province Nanshan District South Road West Guangxi Temple northbound sun Huayi Building 1 15D-02F Patentee before: Shenzhen Guangqi Hezhong Technology Co., Ltd. |