CN109742503A - Based on the cross talk restraining method and structure between artificial SPP transmission line and microstrip line - Google Patents
Based on the cross talk restraining method and structure between artificial SPP transmission line and microstrip line Download PDFInfo
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- CN109742503A CN109742503A CN201910025363.3A CN201910025363A CN109742503A CN 109742503 A CN109742503 A CN 109742503A CN 201910025363 A CN201910025363 A CN 201910025363A CN 109742503 A CN109742503 A CN 109742503A
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Abstract
The invention discloses a kind of cross talk restraining methods and structure based between artificial SPP transmission line and microstrip line, mainly it is made of medium substrate, artificial SPP transmission line and microstrip line, the artificial SPP transmission line and microstrip line are set on medium substrate, and the microstrip line is oppositely arranged with artificial SPP transmission line, and coupled section is provided between the artificial SPP transmission line and microstrip line, it is mismatched using transmission mode between artificial SPP transmission line and microstrip line, and then inhibits the crosstalk between artificial SPP transmission line and microstrip line.The present invention is for degree of coupling different between transmission line, different artificial SPP transmission line structures is designed, the crosstalk between transmission line can be not only effectively reduced and also correspondingly improve the efficiency of transmission of transmission line and then can be widely applied in the high-speed and high-density integrated circuit of ultra wideband transmissions.
Description
Technical field
The present invention relates to a kind of based on artificial surface etc. not from the transmission mode between polariton transmission line and microstrip line
The clutter reduction technology matched belongs to communication and novel for reducing the signal interference between the transmission line under different coupling conditions
Artificial electromagnetic material field.
Background technique
With the development of power electronics high frequency, integration and miniaturization, the electromagnetic interference problem between transmission line is also got over
Come more serious.In order to reduce the electromagnetic interference between transmission line, a large amount of suppression technology is suggested, such as: increase transmission line it
Between distance, apply new circuit devcie between transmission line, using multilayer acoustical panel etc..But this classpath can expand space, increase
Lossy and the problems such as introduce non-linear components, therefore, because cross-interference issue caused by electromagnetic interference is still one between transmission line
Challenging problem.
So-called surface plasmon-polarition (SPPs) is a kind of surface electricity propagated on metal and dielectric interface
Magnetic wave is a kind of slow-wave structure.Under field conditions (factors), only just there is SPPs in high band.However, in order to be applied to Microwave Frequency
Section demonstrates a kind of structure of two-dimentional through-hole array form in professor J.B.Pandry in 2004, electromagnetic beam can be made to be tied to knot
Structure surface constitutes surface wave, that is, artificial SPPs of similar SPPs.For the ease of making it be applied to integrated circuit, the Shen of Southeast China University
Dawn, roc associate professor proposed a kind of surface phasmon structure with general character characteristic in 2013.In recent years, based on artificial
The transmission line structure of SPPs is studied, and compares with traditional microstrip line, it has low bending loss, anti-interference and miniaturization
Etc. advantages.
Summary of the invention
Goal of the invention: to effectively inhibit the different degrees of electromagnetic interference between transmission line, the present invention provides one kind and is based on
(artificial SPP transmission line transverse magnetic wave, microstrip line transmit transverse-electromagnetic to transmission mode between artificial SPP transmission line and microstrip line
Wave) unmatched cross talk restraining method and structure.Using the low-pass characteristic of artificial SPP transmission line and the high pass characteristic of microstrip line,
It can achieve the effect that high-transmission and low crosstalk simultaneously, and the working band on two lines road can pass through the several of SPP transmission line
What parameter regulation.
Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of cross talk restraining method based between artificial SPP transmission line and microstrip line, utilizes artificial SPP transmission line and micro-strip
Transmission mode mismatches between line, and then inhibits the crosstalk between transmission line；Under different coupling conditions, microstrip line and transmission line it
Between coefficient of coup k and coupled section line distance s numerical relation it is as follows:
Wherein, the coefficient of coup of the k between microstrip line and transmission line, υ0For the light velocity, μ is the magnetic conductivity of medium, t0For medium
The thickness of substrate, t are the thickness of metal, and w is the width of artificial SPP transmission line, and s is the line spacing of coupled section.
It is preferred: to work as k2>=0.1 thinks between microstrip line and transmission line for close coupling, k2< 0.1 thinks microstrip line and transmission
It is weak coupling between line:
A kind of clutter reduction structure based between artificial SPP transmission line and microstrip line, mainly by medium substrate, artificial SPP
Transmission line and microstrip line are constituted, and the artificial SPP transmission line and microstrip line are set on medium substrate, and the microstrip line and people
Work SPP transmission line is oppositely arranged, and is provided with coupled section between the artificial SPP transmission line and microstrip line；The microstrip line point
It is not connect with described artificial SPP transmission line one end with input terminal, the other end is connect with transmission end；Described microstrip line one end be isolated
End connection, the other end are connect with coupled end.
Preferred: artificial SPP transmission line includes unit periodic structure and period-graded structure, and the period-graded structure is set
It is placed in the both ends of unit periodic structure.
Preferred: each period in the unit periodic structure is in U-shaped structure or the unit periodic structure
Each period is L-shaped structure.
Preferred: each period in the period-graded structure is in U-shaped structure or the unit periodic structure
Each period is L-shaped structure.
The present invention compared with prior art, has the advantages that
1. the present invention is only the crosstalk that can inhibit between transmission line by changing the structure of transmission line, easy to operate, avoid
Space is saved in the introducing of passive and active device and multilayer dielectricity, convenient for miniaturization.
2. artificial SPP transmission line is introduced into conventional microstrip line integrated circuit by the present invention, crosstalk not only restrained effectively,
Also ensure the ultra wideband transmissions of transmission line.
3. the present invention is solved compared in the case of close coupling, it is highly dense can be preferably applied to high speed for effective transmission of transmission line
Spend integrated circuit
Detailed description of the invention
Fig. 1 is the cellular construction schematic diagram and its dispersion curve of artificial SPP transmission line, wherein Fig. 1 (a) and Fig. 1 (b) are
Different geometric units structures, Fig. 1 (c) and Fig. 1 (d) are corresponding dispersion curves；
Fig. 2,3 are artificial SPP transmission line and microstrip lines structural schematic diagram, wherein Fig. 2 is the people in the case of close coupling
The geometry of work SPP transmission line and microstrip lines, Fig. 3 are the artificial SPP transmission line and microstrip line coupling in the case of weak coupling
The geometry of conjunction；
Fig. 4 is the transmission and coupling S parameter curve graph of the emulation and experiment in the case of close coupling；
Fig. 5 is the transmission and coupling S parameter curve graph of the emulation and experiment in the case of close coupling.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, it should be understood that these examples are merely to illustrate this
It invents rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention various
The modification of equivalent form falls within the application range as defined in the appended claims.
A kind of cross talk restraining method based between artificial SPP transmission line and microstrip line is swashed based on artificial surface etc. from polarization
The unmatched principle of mode between first (SPP) transmission line and conventional microstrip line；Due to artificial SPP transmission line transverse magnetic wave, and
Conventional microstrip line transmits quasi- transverse electromagnetic wave, and the transmission mode between them mismatches, and artificial SPP transmission line is introduced into tradition
Microstrip IC in, the crosstalk between the transmission line under different coupling conditions can be made to be effectively inhibited.Such as Fig. 2,3 institutes
Show, the clutter reduction structure is mainly made of medium substrate, artificial SPP transmission line and microstrip line, the artificial SPP transmission line
It is set on medium substrate with microstrip line, and the microstrip line is oppositely arranged with artificial SPP transmission line, and the artificial SPP is passed
Coupled section is provided between defeated line and microstrip line；The microstrip line (is held with described artificial SPP transmission line one end and input terminal respectively
1) mouth connects, the other end is connect with transmission end (port 2)；Described microstrip line one end is connect with isolation end (port 3), the other end with
Coupled end (port 4) connection.Artificial SPP transmission line includes unit periodic structure and period-graded structure, the gradual period knot
Structure is set to the both ends of unit periodic structure.As shown in Figure 1, each period in the unit periodic structure is U-shaped structure, or
Each period in unit periodic structure described in person is L-shaped structure.Each period in the period-graded structure is U-shaped knot
Each period in structure or the unit periodic structure is L-shaped structure, the artificial SPP transmission line under different coupling conditions
Structure is different.
It is mismatched using transmission mode between artificial SPP transmission line and microstrip line, and then inhibits the crosstalk between transmission line: is logical
The calculating electromagnetism formula (formula 1) for crossing traditional coupled microstrip line, coefficient of coup k's and coupled section between microstrip line and transmission line
The numerical relation (formula 2) of line distance s
Wherein l is the self-induction of microstrip line, lmMutual inductance between coupled microstrip line, υ0For the light velocity, w is the width of transmission line,
t0For the thickness of dielectric substrate, μ is the magnetic conductivity of medium, and t is the thickness of metal.
By formula (1), it is known that the coefficient of coup is
It is obtained after substitution:
Work as k2>=0.1 thinks between microstrip line and transmission line for close coupling, k2< 0.1 think be between microstrip line and transmission line
Weak coupling.
As shown in Figure 1, the cellular construction of artificial SPP transmission line, wherein unit period p=2mm, width w=2.5mm, slot
Wide a=1mm, d0=0.4mm, a1=0.3mm, a0With a2The sum of be 1.4mm, dielectric-slab be with a thickness of 0.79mm TLY-5.With
Business software CST, which carries out eigen mode emulation, can obtain shown in its dispersion curve such as Fig. 1 (c) and Fig. 1 (d), can from the result of emulation
Artificial SPP transmission line has low-pass characteristic out, and effective groove depth plays critical effect to the passband of transmission line.
By the calculating of formula 2, when s=0.3mm can be considered as close coupling condition；When s=2.5mm can be considered as weak coupling
Conjunction condition.According to the difference of transmission line spacing, different artificial SPP transmission lines is designed.In order to there is artificial SPP transmission line more
Laser propagation effect well has used transition structure (wedge structure (L-shaped structure)).Wherein the parameter of transmission line is respectively p=2mm,
p2=2mm, w=2.5mm, a=1mm, a0=0.4mm, a1=0.25mm, a2=1.1mm, d=2.2mm, d0=0.4mm, d1=
0.4mm.When 1 input signal of port, port 2 is transmission end, and port 3 is isolation end, and port 4 is coupled end, and S21 can table at this time
Show configured transmission, S41 can indicate coupling parameter.In order to verify the clutter reduction degree under strong and weak coupling condition, emulation and material object
The result difference of test is as shown in Figure 4 and Figure 5.It can be seen from the figure that (s in the case where close coupling1=0.3mm), with coupling
Close microstrip line between crosstalk compare, introducings of artificial SPP transmission line make the crosstalk between transmission line in entire frequency range be averaged compared with
Few 20dB or so；(s in the case where weak coupling2=2.5mm), compared with the crosstalk between coupled microstrip line, artificial SPP transmission line
Introducing make the average less 30dB or so in entire frequency range of the crosstalk between transmission line.
The present invention is made of, without increasing line spacing and volume using medium substrate as carrier artificial SPP transmission line and microstrip line
The modes such as outer circuit are mismatched using transmission mode between artificial SPP transmission line and microstrip line, and then between inhibition transmission line
Crosstalk.In the case where weak coupling, artificial SPP transmission line can be made of a series of unit periodic structures and the both ends of transmission line are
Period-graded structure (as shown in Figure 3).To different transmission line coupling situations, the structure of artificial SPP transmission line is different.Strong
In the case where coupling, (region I is microstrip line to artificial SPP transmission line structure and region II is transitional SPP knot as shown in Figure 2
Structure), although corresponding transmission band will by the less crosstalk of effective trench depth energy for changing artificial SPP transmission line
Reduction largely, therefore different transmission structures need to be designed.At this point, only the coupled section of transmission line need to be designed as having
Transitional period SPP structure (as shown in Figure 2) adjusts the line distance s of coupled section.It is transitional in weak coupling
Artificial SPP transmission line, such as Fig. 3) shown in, crosstalk can be inhibited by changing effective trench depth.The artificial SPP transmission line of the present invention
Be combineding with each other between conventional microstrip line not only can effectively inhibit crosstalk between transmission line, can also in ultra wideband transmissions, into
And it is applied to high-speed and high-density integrated circuit.
The present invention designs different artificial SPP transmission line structures, can not only have for degree of coupling different between transmission line
The crosstalk that effect reduces between transmission line has also correspondingly improved the efficiency of transmission of transmission line and then can be widely applied to ultra wideband transmissions
High-speed and high-density integrated circuit in.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of cross talk restraining method based between artificial SPP transmission line and microstrip line, it is characterised in that: passed using artificial SPP
Transmission mode mismatches between defeated line and microstrip line, and then inhibits the crosstalk between artificial SPP transmission line and microstrip line；In different couplings
In the case of conjunction, the numerical relation of the line distance s of the coefficient of coup k between microstrip line and transmission line and coupled section is as follows:
Wherein, the coefficient of coup of the k between microstrip line and transmission line, υ0For the light velocity, μ is the magnetic conductivity of medium, t0For medium substrate
Thickness, t be metal thickness, w be artificial SPP transmission line width, s be coupled section line spacing.
2. according to claim 1 based on the cross talk restraining method between artificial SPP transmission line and microstrip line, it is characterised in that:
Work as k2>=0.1 thinks between microstrip line and transmission line for close coupling, k2< 0.1 thinks between microstrip line and transmission line for weak coupling.
3. a kind of any described based on the cross talk restraining method between artificial SPP transmission line and microstrip line using claim 1-2
Manufactured clutter reduction structure, it is characterised in that: be mainly made of medium substrate, artificial SPP transmission line and microstrip line, the people
Work SPP transmission line and microstrip line are set on medium substrate, and the microstrip line is oppositely arranged with artificial SPP transmission line, and institute
It states and is provided with coupled section between artificial SPP transmission line and microstrip line；The microstrip line respectively with described artificial SPP transmission line one end
It is connect with input terminal, the other end is connect with transmission end；Described microstrip line one end is connect with isolation end, and the other end and coupled end connect
It connects.
4. clutter reduction structure according to claim 3, it is characterised in that: artificial SPP transmission line includes unit periodic structure
And period-graded structure, the period-graded structure are set to the both ends of unit periodic structure.
5. clutter reduction structure according to claim 4, it is characterised in that: each period in the unit periodic structure is
Each period in U-shaped structure or the unit periodic structure is L-shaped structure.
6. clutter reduction structure according to claim 4, it is characterised in that: each period in the period-graded structure is
Each period in U-shaped structure or the unit periodic structure is L-shaped structure.
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| CN201910025363.3A CN109742503B (en) | 2019-01-11 | 2019-01-11 | Crosstalk suppression method and structure between transmission line and microstrip line based on artificial SPP |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031841A1 (en) * | 2007-07-08 | 2009-01-15 | Imst Gmbh | Multi-band coupler structure for e.g. power splitter, has surface plasmon polariton gap wave guide with common layer of metal across entire coupling area, where metallic layer has thickness less than preset value |
| CN108390136A (en) * | 2018-01-23 | 2018-08-10 | 西安电子科技大学 | The method for realizing strange mould artificial surface phasmon guided wave based on complementary trapezoidal shape slot |
| CN108923108A (en) * | 2018-07-20 | 2018-11-30 | 西安电子科技大学 | The controllable flexible microwave directional coupler of the degree of coupling |
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2019
- 2019-01-11 CN CN201910025363.3A patent/CN109742503B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031841A1 (en) * | 2007-07-08 | 2009-01-15 | Imst Gmbh | Multi-band coupler structure for e.g. power splitter, has surface plasmon polariton gap wave guide with common layer of metal across entire coupling area, where metallic layer has thickness less than preset value |
| CN108390136A (en) * | 2018-01-23 | 2018-08-10 | 西安电子科技大学 | The method for realizing strange mould artificial surface phasmon guided wave based on complementary trapezoidal shape slot |
| CN108923108A (en) * | 2018-07-20 | 2018-11-30 | 西安电子科技大学 | The controllable flexible microwave directional coupler of the degree of coupling |
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