CN100576627C - 1-D anisotropic medium to form electromagnetic beam separator and separation method with rotation - Google Patents
1-D anisotropic medium to form electromagnetic beam separator and separation method with rotation Download PDFInfo
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- CN100576627C CN100576627C CN200610049548A CN200610049548A CN100576627C CN 100576627 C CN100576627 C CN 100576627C CN 200610049548 A CN200610049548 A CN 200610049548A CN 200610049548 A CN200610049548 A CN 200610049548A CN 100576627 C CN100576627 C CN 100576627C
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Abstract
The invention discloses a kind of 1-D anisotropic medium to form electromagnetic beam separator and separation method with rotation.The electromagnetic beam separator is a flat board, and this flat board only is staggered the forming in rectangular-shaped unit negative and that dielectric constant only constitutes for negative one dimension anisotropic media by multilayer with magnetic permeability on another main shaft on a main shaft.The present invention can select the anglec of rotation of negative magnetoconductivity (negative permittivity) main shaft and the dispersion characteristics of negative magnetoconductivity (negative permittivity) according to TE (TM) incident electromagnetic wave bundle operating frequency, the feasible electromagnetic beam that is operated in two different frequencies of the negative free transmission range of one dimension anisotropic media can be separated into the unifrequent transmission electromagnetic beam of two bundles, its eye point is positioned at the both sides of normal, has the effect of apart.
Description
Technical field
The present invention relates to a kind of by 1-D anisotropic medium to form electromagnetic beam separator and separation method with rotation.
Background technology
The scientist V.G.Veselago of the former Soviet Union pointed out in nineteen sixty-eight: as the DIELECTRIC CONSTANT of medium and magnetic permeability μ during simultaneously for negative, its refractive index will become negative value.This ε and μ are Left-handed Material for the English name of negative medium simultaneously.Professor J.A.Kong of Massachusetts Institute Technology names its Chinese name to be called " anisotropic media ".Calendar year 2001, the people such as D.R.Smith in California, USA university San Diego branch school are according to the result of study of Britain Imperial College of Science and Technology J.B.Pendry, construct ε and μ first and be negative artificial dielectric simultaneously, its method is that the thin plain conductor array structure effective dielectric constant of employing is the medium of negative value, adopting metal open circuit toroidal cavity resonator array structure equivalent permeability is the medium of negative value, put together by these two kinds of arrays are mixed then, thereby constitute a kind of artificial electromagnetic anisotropic media of equivalence.The anisotropic media that can realize in the laboratory comprises two dimension and one dimension anisotropic media now, and its difference is that the former electromagnetism dispersion characteristics are closed round or ellipse, and the latter is a hyperbolic-type.For the one dimension anisotropic media, because its unique electromagnetism dispersion characteristics, the electromagnetic property that has had some to be different from other anisotropic materials shows.
Summary of the invention
The object of the present invention is to provide a kind of electromagnetic beam separator and separation method that constitutes by one dimension anisotropic media with rotation, the dispersion characteristics that can select the one dimension anisotropic media according to the frequency and the polarization of the wave beam that will separate and the anglec of rotation of medium main shaft, make the eye point of wave beam of different frequency be positioned at the both sides of normal, reach the purpose of apart.
The technical solution adopted for the present invention to solve the technical problems is:
1, a kind of by 1-D anisotropic medium to form electromagnetic beam separator with rotation:
The electromagnetic beam separator is a flat board, this flat board is only being formed for rectangular-shaped unit combination negative and that dielectric constant only constitutes for negative one dimension anisotropic media on second main shaft on first main shaft of one dimension anisotropic media with magnetic permeability by multilayer, each rectangular-shaped unit be by multi-disc be carved with the periodic arrangement that produces negative permittivity and negative magnetoconductivity metal pattern printed circuit board (PCB) and be spaced sticking system without any the blind printing printed circuit board of metal pattern and form, be the one-period metal pattern distance that staggers between the adjacent rectangle shape unit, the metal pattern of adjacent rectangle shape unit common ground still can be piled up.
2, a kind of method of separating electromagnetic beam with the one dimension anisotropic media of rotation:
1) if the separator flat board is to be used for the TE incident electromagnetic wave bundle (1) of electric field perpendicular to plane of incidence, then dielectric constant for negative main shaft perpendicular to plane of incidence, magnetic permeability forms an angle with one of flat board by the hypotenuse border that certain distance forms of staggering mutually, rectangular-shaped unit for negative main shaft in plane of incidence, this angle is an acute angle; When TE incident electromagnetic wave bundle is staggered that hypotenuse border that certain distance forms forms with this hypotenuse border normal in plane of incidence mutually and comprises incident in the zone with simultaneously vertical the 3rd main shaft of first main shaft and second main shaft by rectangular-shaped unit from of flat board, and the frequency of incident wave beam is in the frequency band of bearing at the dielectric constant and the magnetic permeability of one dimension anisotropic media simultaneously, in the promptly negative passband, utilize distinctive hyperbolic-type dispersion relation of one dimension anisotropic media and negative permittivity and negative magnetoconductivity characteristic with frequency change, can be in the not homonymy of normal at dull and stereotyped another according to the frequency of TE incident electromagnetic wave bundle by stagger the mutually eye point of transmission electromagnetic beam on the hypotenuse border that certain distance forms of rectangular-shaped unit, thereby make same incident direction with two different frequencies with the TE incident electromagnetic wave bundle of incidence point by this flat board the time, be separated into two bundle unifrequency transmission electromagnetic beams, and be respectively in the both sides of normal, reached apart.
2) according to the antithesis character of electromagnetic field,, also can realize that wave beam separates for the TM incident wave beam of magnetic field perpendicular to plane of incidence.
3) this electromagnetic beam separator is based on the electromagnetism dispersion characteristics of the distinctive hyperbolic-type of one dimension anisotropic media, therefore at any electromagnetic wave band, as long as the one dimension anisotropic media in this wave band can be realized, then according to 1) described method, just can realize the separation of the electromagnetic beam in this wave band.
4), also can be with 1 for the medium of the electromagnetism dispersion characteristics of hyperbolic-type with one dimension anisotropic media) described method realizes that this electromagnetic beam separates.
The useful effect that the present invention has is: can select the anglec of rotation of negative magnetoconductivity (negative permittivity) main shaft and the dispersion characteristics of negative magnetoconductivity (negative permittivity) according to the operating frequency of TE (TM) incident electromagnetic wave bundle, make two different frequencies being operated in the negative free transmission range of one dimension anisotropic media same incident direction, can be separated into the unifrequent transmission electromagnetic beam of two bundles with the electromagnetic beam of incidence point, its eye point is positioned at the both sides of normal, has the effect of apart.
Description of drawings
Fig. 1 is the structure vertical view of electromagnetic beam separator.
Fig. 2 be among Fig. 1 A to the view of a rectangular-shaped unit of formation one dimension anisotropic media flat board.
Among the figure: 1, be TE incident electromagnetic wave bundle, 2, be the normal of incidence point correspondence, 3, be the transmission electromagnetic beam, 4, flat board, 5, rectangular-shaped unit.
Embodiment
As shown in Figure 1, 2, electromagnetic beam separator of the present invention is a flat board 4.Fig. 1 is the structure vertical view of electromagnetic beam separator.As shown in FIG., dull and stereotyped 4 borders are in the x direction, and normal is in the z direction.Plane of incidence is x-z plane, perhaps e
1-e
3The plane.e
1, e
2And e
3Three main shafts for the one dimension anisotropic media.e
1Axle is the negative main shaft in plane of incidence, e for magnetic permeability
2For dielectric constant is the negative main shaft perpendicular to plane of incidence, and e
3For magnetic permeability is the positive main shaft in plane of incidence.θ is e
1Axle and the formed angle in interface.Whole dull and stereotyped 4 are made up of multilayer rectangle shape unit 5, and the thickness of each rectangular-shaped unit 5 is δ.Each rectangular-shaped unit 5 is to be carved with the metallic pattern of the periodic arrangement that produces negative permittivity and negative magnetoconductivity by multi-disc (Fig. 2 is a kind of S type, also can be the figure of other one dimension anisotropic medias, as the Ω type etc.) printed circuit board (PCB) and be spaced without any the blind printing printed circuit board of metal pattern that sticking system forms, thickness δ is by the sheet number decision of printed circuit board (PCB).Dull and stereotyped 4 the time when constituting with these rectangular-shaped unit 5, the one-period pattern distance delta that staggers between the adjacent rectangle shape unit 5, this makes the metal pattern of adjacent rectangle shape unit 5 common grounds still can be piled up.
For TE incident electromagnetic wave bundle 1, wave beam is from e
3The quadrant incident that axle is passed, dull and stereotyped 4 frequencies according to wave beam make wave beam have different eye points, as above normal (wave beam that solid line is represented), perhaps below normal (wave beam that dotted line is represented).Above-mentioned structure can make the electromagnetic beam of frequency in the negative passband of one dimension anisotropic media have different refraction behaviors.If negative magnetoconductivity is a normal dispersion, promptly is that its real part increases with frequency, then whole negative passband can be divided into two parts.When the frequency of electromagnetic beam in low frequency part, wave beam then can be experienced negative refraction in medium, then can observe wave beam when going out to penetrate medium and have negative skew; For electromagnetic beam, then obtain positive skew at HFS.Thereby make to have the equidirectional of two different frequencies, be separated into the unifrequent wave beam of two bundles, and the unifrequent transmission electromagnetic beam 3 of two bundles is positioned at not homonymy of normal, reached the purpose of apart wave beam with the TE incident electromagnetic wave bundle 1 of incidence point.This frequency separation is by the dispersion characteristics decision of negative magnetoconductivity main shaft and dielectric boundaries angle and medium negative magnetoconductivity.According to the antithesis character of electromagnetic theory,, then determine the angle for negative permittivity and main shaft and interface of frequency separation for TM incident electromagnetic wave bundle.
Claims (5)
1, a kind of 1-D anisotropic medium to form electromagnetic beam separator with rotation is characterized in that:
The electromagnetic beam separator is a flat board (4), this flat board by multilayer with magnetic permeability only at first main shaft (e of one dimension anisotropic media
1) go up to negative, the direction of this first main shaft is the direction that rectangular-shaped cells overlap is arranged, and dielectric constant is only at second main shaft (e
2) go up to negative, the direction of vertical this first main shaft of the direction of this second main shaft and combine along the rectangular-shaped unit (5) that the one dimension anisotropic media of the bearing of trend of each rectangular-shaped unit constitutes, each rectangular-shaped unit (5) be by multi-disc be carved with the periodic arrangement that produces negative permittivity and negative magnetoconductivity metal pattern printed circuit board (PCB) and be spaced sticking system without any the blind printing printed circuit board of metal pattern and form, be the one-period metal pattern distance (σ) that staggers between the adjacent rectangle shape unit (5), the metal pattern of adjacent rectangle shape unit common ground still can be piled up.
2, be used for the described a kind of separation method of claim 1, it is characterized in that with the 1-D anisotropic medium to form electromagnetic beam separator that rotates:
If the separator flat board is to be used for the TE incident electromagnetic wave bundle (1) of electric field perpendicular to plane of incidence, then dielectric constant is the second negative main shaft (e
2) perpendicular to plane of incidence, magnetic permeability is the first negative main shaft (e
1) in plane of incidence, forming (θ) angle by the hypotenuse border that certain distance forms of staggering mutually, rectangular-shaped unit with dull and stereotyped (4) one, this (θ) angle be an acute angle; When TE incident electromagnetic wave bundle (1) staggers that hypotenuse border and this hypotenuse border normal (2) in plane of incidence that certain distance forms forms mutually by rectangular-shaped unit and comprises and the first main shaft (e from dull and stereotyped (4) one
1) and the second main shaft (e
2) the 3rd simultaneously vertical main shaft (e
3) the zone in incident, and the frequency of incident wave beam is in the frequency band of bearing at the dielectric constant and the magnetic permeability of one dimension anisotropic media simultaneously, in the promptly negative passband, utilize distinctive hyperbolic-type dispersion relation of one dimension anisotropic media and negative permittivity and negative magnetoconductivity characteristic with frequency change, another can be in the not homonymy of normal according to the frequency of TE incident electromagnetic wave bundle (1) by stagger the mutually eye point of transmission electromagnetic beam (3) on the hypotenuse border that certain distance forms of rectangular-shaped unit in dull and stereotyped (4), thereby make same incident direction with two different frequencies with the TE incident electromagnetic wave bundle (1) of incidence point by this flat board the time, be separated into two bundle unifrequency transmission electromagnetic beams (3), and be respectively in the both sides of normal, reached apart.
3, a kind of separation method according to claim 2 with the 1-D anisotropic medium to form electromagnetic beam separator that rotates, it is characterized in that: according to the antithesis character of electromagnetic field, for the TM incident wave beam of magnetic field, also can realize that wave beam separates perpendicular to plane of incidence.
4, a kind of separation method according to claim 2 with the 1-D anisotropic medium to form electromagnetic beam separator that rotates, it is characterized in that: this electromagnetic beam separator is based on the electromagnetism dispersion characteristics of the distinctive hyperbolic-type of one dimension anisotropic media, therefore at any electromagnetic wave band, as long as the one dimension anisotropic media in this wave band can be realized, method then according to claim 2 just can realize the separation of the electromagnetic beam in this wave band.
5, a kind of separation method according to claim 2 with the 1-D anisotropic medium to form electromagnetic beam separator that rotates, it is characterized in that:, also can realize that this electromagnetic beam separates with the method that claim 2 is described for the medium of the electromagnetism dispersion characteristics of hyperbolic-type with one dimension anisotropic media.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610049548A CN100576627C (en) | 2006-02-20 | 2006-02-20 | 1-D anisotropic medium to form electromagnetic beam separator and separation method with rotation |
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| CN200610049548A CN100576627C (en) | 2006-02-20 | 2006-02-20 | 1-D anisotropic medium to form electromagnetic beam separator and separation method with rotation |
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| CN1825679A CN1825679A (en) | 2006-08-30 |
| CN100576627C true CN100576627C (en) | 2009-12-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102790285B (en) * | 2011-05-18 | 2015-11-18 | 深圳光启高等理工研究院 | Line polarization wave R-T unit |
| CN102790281B (en) * | 2011-05-20 | 2015-04-22 | 深圳光启高等理工研究院 | Metamaterial capable of diverging electromagnetic waves |
| CN103219567B (en) * | 2013-04-09 | 2016-04-20 | 中国工程物理研究院应用电子学研究所 | A kind of metamaterial mode converter |
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Non-Patent Citations (2)
| Title |
|---|
| 一种新型人工异向介质结构的设计和仿真. 皇甫江涛，冉立新，陈抗生.浙江大学学报(工学版)，第39卷第4期. 2005 |
| 一种新型人工异向介质结构的设计和仿真. 皇甫江涛，冉立新，陈抗生.浙江大学学报(工学版)，第39卷第4期. 2005 * |
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