CN109802210A - A kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period - Google Patents
A kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period Download PDFInfo
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- CN109802210A CN109802210A CN201910092910.XA CN201910092910A CN109802210A CN 109802210 A CN109802210 A CN 109802210A CN 201910092910 A CN201910092910 A CN 201910092910A CN 109802210 A CN109802210 A CN 109802210A
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Abstract
A kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period, is related to artificial surface phasmon waveguide.Equipped with medium substrate, metal structure is equipped in the side of medium substrate, the metal structure is equipped with the transition structure of coplanar wave guide feedback structure, intermediate artificial surface phasmon waveguide transmission structure and artificial surface phasmon, the transition structure of the artificial surface phasmon is located between coplanar wave guide feedback structure and the artificial surface phasmon waveguide transmission structure of centre, and the coplanar wave guide feedback structure is located at medium substrate both ends.Progressive frequency is reduced, the bound of electromagnetic wave is enhanced, is of great significance to plane SSPP waveguide dimensions are reduced.By adjusting the size of back-shaped minor matters side length, free transmission range can be changed, and have many advantages, such as that size is small, easy to process, transmission rate is high.
Description
Technical field
The present invention relates to artificial surface phasmon waveguides, are based on the back-shaped minor matters symmetrical configuration period more particularly, to one kind
Artificial surface phasmon waveguide.
Background technique
Surface phasmon (Surface Plasmon Polaritons, SPPs) is external electromagnetic field and metal surface area
Domain free electron interact to be formed along metal surface propagate electronic sparse wave.Since in optical band, metal has negative
Dielectric constant, according to the boundary condition of electromagnetic field, it can be proved that there is the surface phasmons of optical band for metal surface.Table
Phasmon tool in face is there are two obvious characteristic, and first, the wave vector on the direction of propagation is bigger than light wave arrow；Second, in propagation side
To vertical direction, field is exponentially decayed, and is had high bound.This unique transmission characteristic is low to device miniaturization
It is lost highly beneficial.But regrettably, in terahertz wave band, even lower microwave section, metal surface is perfect electric conductor
(PEC) non-plasma causes metal that can not inspire surface phasmon in microwave, millimeter wave and terahertz wave band.
Therefore, it in order to simulate the surface phasmon of optical band in low-frequency band, is applied in microwave small device and circuit
Research and development in, the Pendry jazz of Britain and its colleague design artificial periodical media hole array knot on the metal surface first
Structure significantly reduces metal surface plasma body frequency, obtains the artificial surface for constructing microwave and millimeter wave frequency band
Phasmon (Spoof SPP, also known as Designer SPP).
Nowadays there are many waveguide of artificial surface phasmon is based on, such as document (Conformal surface
plasmons propagating on ultrathin and flexible films[J].Proceedings of the
National Academy of Sciences, 2013,110 (1): 40-45) a kind of ultrathin is proposed (close to zero thickness
Degree) conformal artificial surface phasmon structure, realize the waveguide of artificial surface phasmon from stereochemical structure to planar structure
Transformation.
But most of artificial surface phasmon waveguide reported at present uses linear minor matters or groove, electromagnetic wave
Bound difference, size is often larger, and transmission rate is lower, it is difficult to investment actual use.
Summary of the invention
The purpose of the present invention is to provide that can reduce device size, the bound one kind of enhancing electromagnetic wave is based on back-shaped branch
The artificial surface phasmon waveguide of section structure symmetric periodic.
The present invention is equipped with medium substrate, is equipped with metal structure in the side of medium substrate, the metal structure is equipped with coplanar
The transition structure of waveguide feed structure, intermediate artificial surface phasmon waveguide transmission structure and artificial surface phasmon,
The transition structure of the artificial surface phasmon is located at coplanar wave guide feedback structure and intermediate artificial surface phasmon wave
It leads between transmission structure, the coplanar wave guide feedback structure is located at medium substrate both ends.
The coplanar wave guide feedback structure is equipped with the metal ground structure of middle conductor part and distributed conductive both ends.
The transition structure of the artificial surface phasmon is equipped with the wave vector matching strip of intermediate artificial surface phasmon
It is the metal ground structure of elliptic curve with boundary curve；The wave vector matching strip contains the back-shaped minor matters structure of side length gradual change, institute
Back-shaped minor matters structure is stated to be square.
The periodic unit of the artificial surface phasmon waveguide transmission structure of the centre loads back-shaped gold by shape of rectangular ribbon
Belong to ring structure to constitute.
Present invention reduces progressive frequencies, enhance the bound of electromagnetic wave, have to plane SSPP waveguide dimensions are reduced
Significance.
Compared with the prior art, the present invention has the advantages that following prominent and significant effect: in artificial surface etc. from sharp
Using the back-shaped minor matters period knot of Novel symmetrical in the transition structure of member and intermediate artificial surface phasmon waveguide transmission structure
Structure guides microwave and millimeter wave, simulates the surface phasmon of optical band well, and compared to traditional unit knot
Structure is that linear minor matters or groove artificial surface phasmon waveguide, the structure dispersion curve further offset from light cone line, gradually
It is far below the progressive frequency of tradition SSPP waveguide into frequency, SSPP can be further strengthened in the constraint ability of metal surface.It is logical
The size of back-shaped minor matters side length is overregulated, free transmission range can be changed, and have many advantages, such as that size is small, easy to process, transmission rate is high.
Detailed description of the invention
Fig. 1 is the structure composition top view of the embodiment of the present invention.
Fig. 2 is the ruler of coplanar wave guide feedback structure and the transition structure of artificial surface phasmon described in the embodiment of the present invention
Very little Parameter Map.
Fig. 3 is the dispersion curve figure of the embodiment of the present invention.
Fig. 4 is the measured result of the return loss plot of the embodiment of the present invention.
Fig. 5 is the measured result of the transmission coefficient curve of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further described.
Referring to Fig. 1, the embodiment of the present invention is equipped with medium substrate, is equipped with metal structure, the gold in the side of medium substrate
Belong to structure be equipped with coplanar wave guide feedback structure 1, intermediate artificial surface phasmon waveguide transmission structure 3 and artificial surface etc. from
The transition structure 2 of excimer, the transition structure 2 of the artificial surface phasmon are located at coplanar wave guide feedback structure 1 and centre
Between artificial surface phasmon waveguide transmission structure 3, the coplanar wave guide feedback structure 1 is located at medium substrate both ends.
The coplanar wave guide feedback structure 1 is equipped with the metal ground structure of middle conductor part and distributed conductive both ends.
The transition structure 2 of the artificial surface phasmon is equipped with the wave vector matching strip of intermediate artificial surface phasmon
It is the metal ground structure of elliptic curve with boundary curve；The wave vector matching strip contains the back-shaped minor matters structure of side length gradual change.
The periodic unit of the artificial surface phasmon waveguide transmission structure 3 of the centre loads back-shaped gold by shape of rectangular ribbon
Belong to ring structure to constitute.
The medium substrate with a thickness of 0.8mm, relative dielectric constant 2.2, loss tangent is not more than 0.005,
Long side length A is 230mm, and bond length B is 35.4mm.
Referring to fig. 2, the coplanar wave guide feedback structure 1 is made of middle conductor part and distributed conductive both ends metal.
Wherein, the rectangular metal ground structure long side length w at distributed conductive both ends is 15mm, and bond length L1 is 10mm, and intermetallic metal is led
Body portion width H is 5mm, is located at center conductor two sides to rectangular metal, and the gap width s at a distance of conductor is 0.25mm.It is described
The transition structure 2 of artificial surface phasmon is ellipse by the wave vector matching strip and distribution edges at two ends curve of minor matters overall length gradual change
The metal ground structure of curve forms, the metallic transmission that wave vector matching strip is extended by 1 middle conductor of coplanar wave guide feedback structure
Line loads the back-shaped minor matters composition of longitudinal length gradual change, and back-shaped minor matters are square, with the extension of metal transmission line, Zong Xiangchang
It to h is 4mm that degree, which is 0.5mm even variation by h1, remaining size remains unchanged, back-shaped structure lower section shape of rectangular ribbon long side length f
It is 0.5mm for 0.8mm, bond length m.Back-shaped minor matters cycle length p is 5mm, and the back-shaped width of frame f1 of metal is 0.4mm.It is described
It is distributed the metal ground structure that edges at two ends curve is elliptic curve, long axis half length L2 is 50mm, and short axle half length w is
15mm。
It is a kind of artificial surface phasmon waveguide periodic unit based on the back-shaped minor matters symmetrical configuration period referring to Fig. 3
The dispersion curve of structure.It can be seen that dispersion curve further offsets from light cone line, compared to biography with the increase of the total longitudinal length h of minor matters
The field containment characteristic of the rectangular channel of system, surface phasmon is more obvious.
It is a kind of artificial surface phasmon waveguide echo based on the back-shaped minor matters symmetrical configuration period referring to fig. 4 with Fig. 5
Loss, transmission coefficient measured value, return loss be less than -10dB and transmission coefficient be greater than-three dB bandwidth is 1.85~7.72GHz.
Metal structure of the invention is located at medium substrate unilateral side, and metal transmission line periodic unit structure is by symmetrical rectangle gold
Belong to line and loads back-shaped minor matters composition.The metal transmission line constituted using this periodic structure, can guide microwave artificial surface etc.
From excimer, have the characteristics that small size, broader bandwidth, transmission rate are high, easy to process, dispersion curve on the right side of light cone line,
And it is higher than general artificial phasmon waveguide departure degree, there is lower progressive frequency, depth sub-wavelength may be implemented
The constraint of local fields can be used in the transmission of the artificial surface phasmon electromagnetic wave of microwave and millimeter wave band.
Claims (8)
1. a kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period, it is characterised in that be equipped with medium base
Plate is equipped with metal structure in the side of medium substrate, and the metal structure is equipped with coplanar wave guide feedback structure, intermediate labor statement
The transition structure of face phasmon waveguide transmission structure and artificial surface phasmon, the transition of the artificial surface phasmon
Structure is located between coplanar wave guide feedback structure and the artificial surface phasmon waveguide transmission structure of centre, the co-planar waveguide
Feed structure is located at medium substrate both ends.
2. a kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period as described in claim 1, special
Sign be the medium substrate with a thickness of 0.8mm, relative dielectric constant 2.2, loss tangent is not more than 0.005, long
Edge lengths are 230mm, bond length 35.4mm.
3. a kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period as described in claim 1, special
Sign is that the coplanar wave guide feedback structure is equipped with the metal ground structure of middle conductor part and distributed conductive both ends.
4. a kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period as claimed in claim 3, special
Sign is that the rectangular metal ground structure long side length at the distributed conductive both ends is 15mm, bond length 10mm, intermetallic metal
Conductor part width is 5mm, is located at center conductor two sides to rectangular metal, and the gap width at a distance of conductor is 0.25mm.
5. a kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period as described in claim 1, special
Sign be the transition structure of the artificial surface phasmon be equipped with intermediate artificial surface phasmon wave vector matching strip and
Boundary curve is the metal ground structure of elliptic curve.
6. a kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period as claimed in claim 5, special
The metal transmission line load that sign is that the wave vector matching strip is extended by coplanar wave guide feedback structure middle conductor is longitudinal long
Spend the back-shaped minor matters structure composition of gradual change.
7. a kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period as claimed in claim 6, special
Sign is that the back-shaped minor matters structure is square, and with the extension of metal transmission line, longitudinal length is by 0.5mm even variation
To 4mm, remaining size is remained unchanged, and shape of rectangular ribbon long side length is 0.8mm, bond length 0.5mm below back-shaped structure；It returns
Shape minor matters cycle length is 5mm, and the back-shaped width of frame of metal is 0.4mm.
8. a kind of artificial surface phasmon waveguide based on the back-shaped minor matters symmetrical configuration period as described in claim 1, special
Sign is that the periodic unit of the artificial surface phasmon waveguide transmission structure of the centre loads back-shaped metal by shape of rectangular ribbon
Ring structure is constituted.
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| CN201910092910.XA CN109802210B (en) | 2019-01-30 | 2019-01-30 | Artificial surface plasmon waveguide based on symmetrical period of clip-shaped branch structure |
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| CN201910092910.XA CN109802210B (en) | 2019-01-30 | 2019-01-30 | Artificial surface plasmon waveguide based on symmetrical period of clip-shaped branch structure |
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Cited By (4)
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| CN110581333A (en) * | 2019-09-26 | 2019-12-17 | 厦门大学 | Artificial surface plasmon transmission line based on fractal branch structure and application |
| CN110739552A (en) * | 2019-10-31 | 2020-01-31 | Oppo广东移动通信有限公司 | Lens structure, lens antenna and electronic equipment |
| CN111370820A (en) * | 2020-03-20 | 2020-07-03 | 厦门大学 | Adjustable band elimination filter based on artificial surface plasmon |
| CN113328257A (en) * | 2021-05-31 | 2021-08-31 | 湖南汽车工程职业学院 | Super surface electromagnetic energy collection device |
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| CN110739552A (en) * | 2019-10-31 | 2020-01-31 | Oppo广东移动通信有限公司 | Lens structure, lens antenna and electronic equipment |
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| CN111370820A (en) * | 2020-03-20 | 2020-07-03 | 厦门大学 | Adjustable band elimination filter based on artificial surface plasmon |
| CN111370820B (en) * | 2020-03-20 | 2021-05-25 | 厦门大学 | Adjustable band elimination filter based on artificial surface plasmon |
| CN113328257A (en) * | 2021-05-31 | 2021-08-31 | 湖南汽车工程职业学院 | Super surface electromagnetic energy collection device |
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