CN105048044B - The transmission line and circuit that suppression based on artificial surface phasmon ripple couples between facing - Google Patents
The transmission line and circuit that suppression based on artificial surface phasmon ripple couples between facing Download PDFInfo
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- CN105048044B CN105048044B CN201510268830.7A CN201510268830A CN105048044B CN 105048044 B CN105048044 B CN 105048044B CN 201510268830 A CN201510268830 A CN 201510268830A CN 105048044 B CN105048044 B CN 105048044B
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Abstract
The transmission line coupled between facing the invention discloses the suppression based on artificial surface phasmon ripple, including dielectric substrate, the tow sides of dielectric substrate are respectively arranged with two sheet metals, and each sheet metal includes some Wave guide units；Two sheet metals on the same face are symmetrical into minute surface, from the either port of sheet metal to the direction at sheet metal midpoint, including at least the changeover portion being sequentially arranged, asymptotic section and periodic structure section；In changeover portion, the depth of groove of Wave guide unit progressively increases to predetermined value from zero, at asymptotic section, the depth of groove of Wave guide unit is predetermined value, waveguide is moved closer to the axis of symmetry, for predetermined value and equal to the distance of the axis of symmetry in periodic structure section, the depth of groove of Wave guide unit；The sheet metal being located in different faces, the position of Wave guide unit is corresponding up and down, and opening direction is opposite.The present invention solves the problems, such as mutual coupling between neighbour, enhances antijamming capability, and saves circuit area, can make syntype circuit, have good application prospect.
Description
Technical field
The invention belongs to artificial electromagnetic material field, and be based particularly on artificial surface phasmon passes through self structure
Reduce the transmission line coupled between facing.
Background technology
In optical band, surface phasmon ripple is a kind of on a kind of special surface that metal and dielectric interface produce
Ripple.The generation of this surface wave be due to the electromagnetic wave phase interaction in intrametallic free electron and medium formed etc. from
Son concussion.Because this special generation mechanism causes this surface phasmon to possess very special physical characteristic, wherein
Mainly there are following two attributes：Depth sub-wavelength effect and field local effect.Therefore a kind of this special mode of electromagnetic wave is new
Type optics has important application value, so as to also result in the concern of the scientists in many fields.
But relevant technology is difficult directly to be used in lower frequency range (microwave and Terahertz frequency range), this is because low
In in the frequency range of far infrared, metal shows as perfect electric conductor rather than plasma properties more.But pass through grinding for scientist
Study carefully, can be by the thought of artificial electromagnetic medium by building corresponding artificial Meta Materials, to realize surface phasmon property.
This surface phasmon ripple can realize such as device miniaturization due to its intrinsic field local, field enhancing and sub-wavelength property
And a variety of potential applications, therefore, this transmission line is one of hope of circuit system of future generation.
Suppression transmission line without producing extra cost (as additional circuit arrangement is not required) faces a coupling scheme for existing
It is particularly significant for integrated circuit, because needing to integrate in the space of very little for modern highly integrated modern system more
Transmission line, therefore interfering with each other between transmission line will be extremely serious, so that destroying signal integrity.
The content of the invention
Goal of the invention：In order to solve the above problem existing in the prior art, there is provided a kind of to can inhibit the waveguide for facing a crosstalk
Type transmission line, to reduce the mutual coupling between adjacent waveguide, and further provides for a kind of circuit based on above-mentioned waveguide type transmission line.
Technical solution：It is a kind of to can inhibit the waveguide type transmission line for facing a crosstalk, including dielectric substrate, the dielectric substrate
Tow sides are respectively arranged with two sheet metals, and each sheet metal includes some Wave guide units；Two gold on the same face
Belong to that piece is symmetrical into minute surface, from the either port of sheet metal to the direction at sheet metal midpoint, including at least the changeover portion being sequentially arranged,
Asymptotic section and periodic structure section；
In changeover portion, the depth of groove of Wave guide unit progressively increases to predetermined value from zero, at asymptotic section, Wave guide unit it is recessed
Groove depth is predetermined value, and waveguide is moved closer to the axis of symmetry, and in periodic structure section, the depth of groove of Wave guide unit is predetermined value
It is and equal to the distance of the axis of symmetry；
The sheet metal being located in different faces, the position of Wave guide unit is corresponding up and down, and opening direction is opposite.
In a further embodiment, the dielectric constant of the dielectric substrate is 2.2.Loss tangent angle is 0.0009.It is thick
Spend for 0.508mm.The Wave guide unit is in ㄩ types.In asymptotic section and periodic structure section, the depth of groove of the Wave guide unit is
1.2~2.0mm.
A kind of circuit, including any of the above-described kind can inhibit the transmission line for facing a crosstalk.
The transmission line that a kind of suppression based on artificial surface phasmon ripple couples between facing, including dielectric substrate and be arranged at
Dielectric substrate side, respectively contain the two of some Wave guide units sheet metals, every sheet metal has one perpendicular to length side
To the first symmetry axis；From one end of sheet metal to the other end, the depth of Wave guide unit groove increases from zero to predetermined value, is formed
After the equal structure of one section of groove depth, then from predetermined value it is decreased to zero；
Two sheet metals have second symmetry axis extended along its length, and the end of two metal sheets is parallel to each other, its
Middle part is close to each other and forms one section of cycle repetitive structure being parallel to each other；
The opposite side of medium substrate is correspondingly arranged on that shaped position is corresponding and Wave guide unit slot opening direction is opposite
Sheet metal.In a further embodiment, the depth of groove of the Wave guide unit is 1.2~2.0mm.The Wave guide unit is in ㄩ
Type.
Beneficial effect：
1. the present invention passes through the improvement of physical basis, the directly mutual coupling between underlying transport line just solves the problems, such as neighbour, enhancing
Antijamming capability.
2. compared to the technology of other circuit grades, the present invention can save circuit without extra additional circuit configuration
Area, simplifies circuit structure.
3. compared to microwave section others transmission line, can easily be made of surface wave transmission energy due to of the invention
Syntype circuit, has stronger application prospect.
4. its propagation constant can not be adjusted arbitrarily compared to conventional transmission line, transmission line of the invention can be by it not
With cellular construction adjust, therefore can realize the adjusting of propagation constant by adjusting depth of defect.
Brief description of the drawings
Fig. 1 a to Fig. 1 c are the structure diagram of the front of Wave guide unit of the present invention, reverse side and side respectively.
Fig. 2 a to Fig. 2 b are the structure diagram of obverse and reverse of the present invention respectively.
Fig. 3 is the S parameter test chart of the present invention.
Fig. 4 is the propagation constant figure under different depth of defect.
Embodiment
As shown in Fig. 1 a to Fig. 2 b, the present invention, which can inhibit, to be faced the waveguide type transmission line of a crosstalk and mainly includes dielectric substrate 1
And the metal grating shape copper foil waveguide moved closer to positioned at the centre of dielectric substrate tow sides.
Specifically, the tow sides of the dielectric substrate are respectively arranged with two sheet metals 2, and each sheet metal includes at least
Some Wave guide unit 2a；Two sheet metals on the same face are symmetrical into minute surface, from the either port of sheet metal to sheet metal
The direction at midpoint, including at least the changeover portion 21 being sequentially arranged, asymptotic section 22 and periodic structure section 23.
As shown in Figure 2 a and 2 b, two copper foils are generally aligned in the same plane, in the longitudinal direction with a symmetry axis, while copper
Paper tinsel itself is symmetrical structure, its symmetry axis is located at midpoint, vertical with length direction.Since the embodiment is planar structure, because
This might also say that two waveguides in the same plane are in a center of symmetry.If nonplanar structure, then the axis of symmetry is curve.
As shown in Fig. 2 a or Fig. 2 b, in changeover portion, the depth of groove of Wave guide unit progressively increases to predetermined value from zero, gradually
Proximal segment, the depth of groove of Wave guide unit is predetermined value, and waveguide is moved closer to the axis of symmetry, in periodic structure section, Wave guide unit
Depth of groove for predetermined value and to the axis of symmetry distance it is equal.
If from a port of waveguide to the direction of another port, its structure is followed successively by First Transition section, asymptotic section, week
Phase structural sections, gradually distal section and the second changeover portion.In the second changeover portion, the depth of groove of Wave guide unit is gradually decrease to from predetermined value
Zero.In gradually distal section, Wave guide unit is gradually distance from the axis of symmetry.
In this embodiment, changeover portion and periodic structure section are parallel with the axis of symmetry.
The sheet metal being located in different faces, the position of Wave guide unit is corresponding up and down, and opening direction is opposite.
In a further embodiment, the Wave guide unit is in ㄩ types, as shown in Figure 1 a or 1b, certainly according to design need
Will, technical staff can use other shapes.
The present invention is that the surface phasmon structural cycle arrangement based on engineer forms.Wherein medium substrate uses
It is Rogers RT 5880, its relative dielectric constant is 2.2, and loss tangent angle is 0.0009.Structure passes through printed circuit thereon
Plate technique is process, wherein two waveguides form mirror symmetry relation up and down.Its unit cycle is 2.4mm, and defect width is
0.96mm, depth of defect 1.92mm, duct height 2.4mm.This special periodic structure make it that structure general performance is
Negative dielectric material, therefore can be with the transmission of support surface phasmon ripple.Since surface phasmon has height field local
Effect, therefore it without the transmission line around influencing, therefore can use this by field energy height local around structure
Principle, couples between the neighbour between transmission waveguide to reduce.
For two waveguides close to each other, its transmission energy ratio (T) and coupling energy ratio (C) can be by following etc.
Formula is described：
Wherein, L represents coupling length, and α is dissipation constant, and the coefficient of coup of κ frequency dependences.Wherein, for SPP tables
Surface wave is led its coefficient of coup and can be expressed as：
Wherein, n and n0Represent the equivalent refraction rule of surrounding space and waveguide.And EjtAnd Ejn(j=1,2) ripple is represented respectively
Lead the tangential and normal direction power plant distribution of j.It is possible thereby to find that the mutual coupling between two waveguides is due to its field between waveguide
Component is overlapping.Therefore, field containment characteristic helps to suppress the coupling between neighbouring waveguide.
As shown in figure 3, tested using vector network analyzer, wherein the Single port of vector network analyzer with it is any
A port is connected, and 2 ports are sequentially connected to other three ports, except the port of connection arrow net is all connected with matched load, and by
This obtains test result.
We can analyze to obtain from the result shown in Fig. 3, and this scheme has preferable for coupling between waveguide neighbour
Inhibitory action suppresses 10dB in broad frequency band than micro-strip, can even reach for specific narrow-band and suppress more than 40dB
Amount.
By the test of system, which demonstrates this transmission line, mutual neighbouring waveguide in broad frequency band
The suppression of coupling, this causes it to have very big utilization prospect in application aspect.
In the embodiment experimental provision by printed circuit according to structure shown in Fig. 2 a and Fig. 2 b processing institute into.Jie used
Lumber is Rogers RT 5880, its dielectric constant is 2.2, and loss tangent angle is about 0.0009, thickness 0.508mm.Table
It is 0.018mm that copper thickness is covered in face.
In order to facilitate test, micro-strip is excessively arrived in four ports by smooth excessiveness structure, and a standard is respectively welded in port
Sub-miniature A connector so that whole system matches and 50 ohm of coaxial waveguide.
As shown in figure 4, the transmission line of the present invention can be adjusted by its different cellular construction, such as tune can be passed through
Depth of defect is saved to realize the adjusting of propagation constant.
In short, the present invention provides a kind of simple and effectively using between the suppression waveguide neighbour of artificial surface phasmon ripple
Coupling scheme.The structure of the present invention has good field containment characteristic, is conveniently made into curved surface syntype circuit, possesses very high
Practical value.The present invention uses two artificial surface moved closer to phasmon waveguide structure fabrications on a planar circuit
To verify the property of its uncoupling, S parameter measurement effectively demonstrates between it can realize efficient neighbour and couples suppression.The program
Only by simple structure, but can without any adjunct circuit area in the case of, in very wide bandwidth, efficiently realize
Waveguide mutual coupling suppresses function between neighbour.
The present invention only faces the technology of a crosstalk by self structure suppression transmission line, has for modern integrated circuits and system
Important promotion meaning.This special device is formed by structure, the dielectric substrate of engineer, can be realized in broadband
Only has negligible mutual coupling between close transmission line.Surface plasmon waveguide is in bent circuit, sub-wavelength electricity
There is huge potential application in road.
The preferred embodiment of the present invention described in detail above, still, during present invention is not limited to the embodiments described above
Detail, in the range of the technology design of the present invention, a variety of equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.It is further to note that described in above-mentioned embodiment
Each particular technique feature, in the case of reconcilable, can be combined by any suitable means.In order to avoid not
Necessary repetition, the present invention no longer separately illustrate various combinations of possible ways.
Claims (10)
1. the transmission line that a kind of suppression based on artificial surface phasmon ripple couples between facing, including dielectric substrate（1）, its feature
It is, the tow sides of the dielectric substrate are respectively arranged with two sheet metals（2）, each sheet metal includes some Wave guide units
（2a）；Two sheet metals on the same face are symmetrical into minute surface, from the either port of sheet metal to the direction at sheet metal midpoint,
Including at least the changeover portion being sequentially arranged（21）, asymptotic section（22）With periodic structure section（23）；
In changeover portion, the depth of groove of Wave guide unit progressively increases to predetermined value from zero, and at asymptotic section, the groove of Wave guide unit is deep
Spend and moved closer to for predetermined value, waveguide to the axis of symmetry, in periodic structure section, the depth of groove of Wave guide unit for predetermined value and arrives
The distance of the axis of symmetry is equal；
Upper and lower corresponding two sheet metals in medium substrate different faces, the position of its Wave guide unit is corresponding up and down, opening
Direction is opposite.
2. the transmission line that the suppression based on artificial surface phasmon ripple as described in claim 1 couples between facing, its feature exist
In the dielectric constant of the dielectric substrate is 2.2.
3. the transmission line that the suppression based on artificial surface phasmon ripple as described in claim 1 couples between facing, its feature exist
In the loss tangent angle of the dielectric substrate is 0.0009.
4. the transmission line that the suppression based on artificial surface phasmon ripple as described in claim 1 couples between facing, its feature exist
In the thickness of the dielectric substrate is 0.508 mm.
5. the transmission line that the suppression based on artificial surface phasmon ripple as described in claim 1 couples between facing, its feature exist
In the Wave guide unit is in ㄩ types.
6. the transmission coupled between facing such as suppression of claim 1 to 5 any one of them based on artificial surface phasmon ripple
Line, it is characterised in that in asymptotic section and periodic structure section, the depth of groove of the Wave guide unit is 1.2 ~ 2.0mm.
7. a kind of circuit, it is characterised in that be based on artificial surface phasmon ripple including claim 1 ~ 6 any one of them
Suppression face between the transmission line that couples.
8. the transmission line that a kind of suppression based on artificial surface phasmon ripple couples between facing, it is characterised in that including medium base
Piece and be arranged at dielectric substrate side, respectively contain the two of some Wave guide units sheet metals, every sheet metal has one to hang down
Directly in the first symmetry axis of length direction；From one end of sheet metal to the other end, the depth of Wave guide unit groove increases from zero to
Predetermined value, after forming the equal structure of one section of groove depth, then from predetermined value is decreased to zero；
Two sheet metals have second symmetry axis extended along its length, and the end of two metal sheets is parallel to each other, its middle part
Close to each other and one section of cycle repetitive structure being parallel to each other of formation；
The metal that shaped position is corresponding and Wave guide unit slot opening direction is opposite is correspondingly arranged in the opposite side of medium substrate
Piece.
9. the transmission line that the suppression based on artificial surface phasmon ripple as described in claim 8 couples between facing, its feature exist
In the depth of groove of the Wave guide unit is 1.2 ~ 2.0mm.
10. the transmission line that the suppression based on artificial surface phasmon ripple as described in claim 8 couples between facing, its feature
It is, the Wave guide unit is in ㄩ types.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510268830.7A CN105048044B (en) | 2015-05-22 | 2015-05-22 | The transmission line and circuit that suppression based on artificial surface phasmon ripple couples between facing |
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| CN102856622A (en) * | 2012-09-21 | 2013-01-02 | 东南大学 | Directional coupler on basis of spoof surface plasmon polariton |
| CN103259067B (en) * | 2013-04-15 | 2015-07-15 | 东南大学 | Differential filter based on artificial surface plasmon |
| CN103390800B (en) * | 2013-07-23 | 2015-07-01 | 东南大学 | Surface plasmon lens based on artificial electromagnetic material |
| CN104332686B (en) * | 2014-10-31 | 2017-01-25 | 东南大学 | Waveguide structure based on artificial surface plasmon device and amplifier |
| CN204632893U (en) * | 2015-05-22 | 2015-09-09 | 江苏轩途电子科技有限公司 | The transmission line of coupling between facing based on the suppression of artificial surface phasmon ripple and circuit |
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