CN102593563B - Waveguide device based on metamaterial - Google Patents
Waveguide device based on metamaterial Download PDFInfo
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- CN102593563B CN102593563B CN201210050453.6A CN201210050453A CN102593563B CN 102593563 B CN102593563 B CN 102593563B CN 201210050453 A CN201210050453 A CN 201210050453A CN 102593563 B CN102593563 B CN 102593563B
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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 reality, refers to a kind of waveguide that allows electromagnetic wave carry out efficient propagation.In some application scenario, in order to dwindle the size of waveguide, people are filled media in the waveguide of being everlasting.But after the interior filled media of waveguide, due to air different from the impedance of filled media (being also impedance mismatch), when thereby the electromagnetic wave that causes propagating in air runs into filled media, can on filled media surface, reflect, not only affect propagation efficiency, and reflected wave can, to the interference of original waveform one-tenth, also can damage emission source when serious.
Summary of the invention
The present invention is directed to above-described technical problem, a kind of waveguide assembly based on super material is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of waveguide assembly based on super material, comprise waveguide and be arranged in described waveguide and the inner space of described waveguide be divided into the shim of two sections, described shim is made by surpassing material, and the impedance of described super material equals or close to the impedance of air.
Preferably, described shim slant setting.
Preferably, described shim is positioned over direction with the central shaft of described waveguide and forms a position that is less than the angle of 90 degree.
Preferably, described shim is vertically placed.
Preferably, described shim is positioned over the position vertical with the direction of the central shaft of described waveguide.
Preferably, described super material comprises medium substrate and a plurality of artificial micro-structural that is attached to described medium substrate.
Preferably, the side in described shim in described waveguide is filled water, to absorb the electromagnetic wave that passed described shim.
Preferably, described waveguide is metal tube.
Preferably, described medium substrate is made by polytetrafluoroethylene or pottery.
Preferably, described artificial micro-structural is the plane with certain topology or the stereochemical structure consisting of metal wire.
The waveguide assembly that the present invention is based on super material has following beneficial effect: in described waveguide, be provided with the shim of being made by super material, can allow the impedance of shim equal or close to the impedance of air, when electromagnetic wave is from described in air incident during the shim based on super material, reflect little, transmission is many, reduced the interference to incoming wave, more can be because reflection damages emission source.
Accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
Fig. 1 is the structural representation of the waveguide assembly based on super material of the present invention;
Fig. 2 is the floor map of the super material for the manufacture of shim of the present invention.
The name that in figure, each label is corresponding 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 super material provided by the invention, it comprises hollow waveguide 10 and is placed in described waveguide 10 and the inner space of described waveguide 10 is divided into the shim 20 of two sections.Generally, described waveguide 10 is metal tube; And the medium of filling in described shim 20 both sides in described waveguide 10 is different.In the present embodiment, the side in described shim 20 in described waveguide 10 is filled air, and fills water in the opposite side of described shim 20, usings as inhaling carrier load.Shim 20 shown in Fig. 1 is slant setting, also form an angle that is less than 90 degree with the direction of the central shaft A-A of described waveguide 10, like this, can increase the contact area of filled media and described shim 20, electromagnetic wave can on larger area, be propagated, improve propagation efficiency.In fact, described shim 20 also can vertically be placed, as the direction of the central shaft A-A perpendicular to waveguide 10 as described in Fig. 1.
The medium of filling in described shim 20 both sides in described waveguide 10 is different, and causes thus reflection of electromagnetic wave, is mainly because both impedances are different.
We know, super material is that a kind of periodically arrangement on medium substrate has the artificial composite material that the artificial micro-structural of certain geometrical shape forms as metal micro structure.People can utilize the geometry of artificial micro-structural and size and arrangement mode to change relative dielectric constant and/or the relative permeability of super material space each point, make its electromagnetic response that produces expection, to control electromagnetic wave propagation.And the formula of impedance is:
wherein μ is relative permeability, and ε is relative permeability.Visible, we can make described shim 20 with super material, its impedance are equaled or close to the impedance of air, like this, can allow electromagnetic wave in the interior propagation of described shim 20 as propagating in air, reflect little, transmission is many.
As shown in Figure 2, described shim 20 comprises super material 22.Described super material 22 comprises medium substrate 24 and is attached to a plurality of artificial micro-structural 26 on medium substrate 24.Generally, by each artificial micro-structural 26 and accompanying medium substrate 24 part people thereof for being defined as a super material cell 28, and the size of each super material cell 28 between the electromagnetic wavelength of required response 1/5th to 1/10th between, and the physical dimension of described artificial micro-structural 26 should belong to the physical dimension of described super material cell 28 the same order of magnitude.Described medium substrate 24 can be made by the high molecular polymers such as polytetrafluoroethylene or ceramic material.The plane with certain topology or stereochemical structure that each artificial micro-structural 26 normally consists of metal wire, and be attached on described medium substrate 24 by certain processing technology, such as etching, plating, brill quarter, photoetching, electronics carve, 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 consist of the metal wire with flat cross section, and is periodic distribution.
In order to reduce electromagnetic wave in reflection during super material 22 described in incident, will allow described super material 22 impedance close to or equal the impedance of air, also, mate with the impedance phase of air.We know, relative dielectric constant ε and the relative permeability μ of air are all slightly larger than 1, and in reality, usually approximate value is 1, therefore can be obtained by formula of impedance, the impedance Z of air is approximately 1.For described super material 22, in view of space each point is also the relative dielectric constant ε of each super material cell 28 and the malleable of relative permeability μ, in the present embodiment, we adopt the physical dimension that is roughly alabastrine artificial micro-structural 26 and passes through to regulate the artificial micro-structural 26 of each super material cell 28, so that the relative dielectric constant ε of each super material cell 28 and relative permeability μ are substantially equal, particularly, we can allow each super material cell 28 relative dielectric constant ε and relative permeability μ is equal to or close to 1, so that the impedance of described super material 22 equals or close to the impedance of air.As from the foregoing, due to relative dielectric constant, ε is lower, and we claim described super material 22 for the super material of low-k.
Above adjustment process, we can utilize computer analog software to complete as CST, and as the adjusting that is the physical dimension of alabastrine artificial micro-structural 26 comprise the width of each line and length size etc., until obtain that the impedance of described super material 22 equals or close to the impedance of air, also be, the impedance of described super material 22 is mated with the impedance phase of air, form " solid-state air ", like this, electromagnetic wave from described in air incident, by super material 22, made shim 20 time reflect little, and because electromagnetic wave is propagated as propagating in air in the described shim 20 based on super material, loss is little, efficiency of transmission is high, wave transparent rate is high.
Like this, the electromagnetic wave being sent by emission source (not shown) imports in described waveguide 10 and while arriving the described shim 20 based on super material, reflection less, how transmission to pass described shim 20 and be transmitted in water, and electromagnetic energy is all absorbed by water and is converted into heat, mode hot that can exchange by the hot and cold water in described waveguide 10 be taken away, can not become to disturb to original waveform more impossible damage emission source.
In addition, described shim 20 is also formed by stacking by super material 22 described in multilayer.
The above is only some embodiments of the present invention and/or embodiment, should not be construed as limiting the invention.For those skilled in the art, not departing under the prerequisite of basic thought of the present invention, can also make some improvements and modifications, and these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the waveguide assembly based on super material, comprise waveguide and be arranged in described waveguide and the inner space of described waveguide be divided into the shim of two sections, it is characterized in that, a side in described shim in described waveguide is filled water, to absorb the electromagnetic wave that passed described shim, the opposite side of described shim is filled air, described shim is made by surpassing material, the impedance of described super material equals or close to the impedance of air, described shim slant setting, described shim is positioned over direction with the central shaft of described waveguide and forms a position that is less than the angle of 90 degree.
2. the waveguide assembly based on super material according to claim 1, is characterized in that, described shim is positioned over the position vertical with the direction of the central shaft of described waveguide.
3. the waveguide assembly based on super material according to claim 1, is characterized in that, described super material comprises medium substrate and is attached to a plurality of artificial micro-structural of described medium substrate.
4. the waveguide assembly based on super material according to claim 1, is characterized in that, described waveguide is metal tube.
5. the waveguide assembly based on super material according to claim 3, is characterized in that, described medium substrate is made by polytetrafluoroethylene or pottery.
6. the waveguide assembly based on super material according to claim 3, is characterized in that, described artificial micro-structural is the plane with certain topology or the stereochemical structure consisting of metal wire.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN102593563A CN102593563A (en) | 2012-07-18 |
| CN102593563B true CN102593563B (en) | 2014-04-16 |
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| DE102013226778A1 (en) * | 2013-12-19 | 2015-06-25 | Vega Grieshaber Kg | Radar level transmitter |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2998614B2 (en) * | 1995-10-04 | 2000-01-11 | 株式会社村田製作所 | Dielectric line |
| TWI263063B (en) * | 2004-12-31 | 2006-10-01 | 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 |
| TW200933223A (en) * | 2008-01-31 | 2009-08-01 | Univ Nat Taiwan | Method for preparing photonic crystal slab waveguides |
| JP5642678B2 (en) * | 2008-08-22 | 2014-12-17 | デューク ユニバーシティーＤｕｋｅ Ｕｎｉｖｅｒｓｉｔｙ | Metamaterials for surfaces and waveguides |
| JP5399686B2 (en) * | 2008-11-06 | 2014-01-29 | 株式会社セルクロス | Electromagnetic wave transmission sheet, wireless LAN system, RFID system, and electromagnetic wave transmission method |
| CN101582529A (en) * | 2009-05-26 | 2009-11-18 | 上海大学 | High medium small scale round waveguide with attenuation |
| CN101562269A (en) * | 2009-05-26 | 2009-10-21 | 上海大学 | High-dielectric attenuation-containing small-dimension rectangular waveguide tube |
| CN202150531U (en) * | 2011-07-29 | 2012-02-22 | 深圳光启高等理工研究院 | Resonant cavity |
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