CN106202634A - The equivalent circuit structure of a kind of CRLH transmission line structure and method for designing thereof - Google Patents
The equivalent circuit structure of a kind of CRLH transmission line structure and method for designing thereof Download PDFInfo
- Publication number
- CN106202634A CN106202634A CN201610488389.8A CN201610488389A CN106202634A CN 106202634 A CN106202634 A CN 106202634A CN 201610488389 A CN201610488389 A CN 201610488389A CN 106202634 A CN106202634 A CN 106202634A
- Authority
- CN
- China
- Prior art keywords
- line
- transmission line
- microstrip line
- drc
- resonant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/06—Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Waveguides (AREA)
Abstract
The invention discloses equivalent circuit structure and the method for designing thereof of a kind of CRLH transmission line structure, including CgRepresent interdigital capacitor, CfThen representing the edge capacitance that interdigital capacitor is formed with microstrip line, L represents the line inductance of microstrip line, LcAnd CcThe resonant tank formed is produced by DRC, and C, in addition to representing the line capacitance of microstrip line, also includes coupling electric capacity between DRC with microstrip line.The present invention proposes to utilize DRC to construct CRLH transmission line structure, then this transmission line structure is utilized to realize the transmission line of+90 ° of 50 Ω and+90 ° of 35 Ω respectively, the transmission line of realization is applied in the design of branch line coupler, substantially reduce the size of branch line coupler, the reduction of the method size is big, will not bring backward radiation, may be used for any frequency range, it is easy to integrated and encapsulation, debugging gets up also to be easier, and has higher design freedom simultaneously.
Description
Technical field
The invention belongs to microwave engineering techniques field, relate to the equivalent circuit structure of a kind of CRLH transmission line structure and set
Meter method.
Background technology
Branch line coupler is one of important devices of microwave engineering, be also plane microwave integrated circuit basic device it
The 3dB branch line coupler of one, especially power decile, the most easily makes, and its output port is positioned at the same side, because of
And be prone to same semiconductor device in structure and combine, constituting the integrated circuits such as balanced mixer, phase shifter and switch, it is also by extensively
It is applied among the design of antenna feeding network.But in theory, the output letter of two output ports of branch line coupler
Phase contrast always 90 ° number in operating frequency, so no matter using which kind of method, which kind of design of material branch line coupler,
The length of its four arm all approximates quarter-wave guide wavelength, when being operated in low-frequency range, and this size electricity integrated for microwave
It is the biggest for road.Therefore, the grinding of circuit size always microwave engineering design personnel of branch line coupler how is reduced
Study carefully focus.
Up to the present, research worker proposes substantially has following four big class methods to reduce the circuit of branch line coupler
Area:
One is to use lamped element: the area adopting the branch line coupler designed in this way can control the least
In the range of, yet with have employed lamped element, therefore its processing is the most cumbersome, and the Q-value of lamped element is general
Relatively higher, therefore its design accuracy requires higher and bandwidth of operation is the narrowest, additionally, due to lamped element self is humorous
Shaking, such branch line coupler may not apply to high frequency occasion.
Two are corrosion electro-magnetic bandgap (EBG) structure on floor: due to the Slow-wave effect of EBG structure, adopt in this way
Its area can be made effectively to reduce about 20%, but owing to have employed EBG structure, the most easily produce backward radiation,
Bring the problems such as the most easy of integration and encapsulation, and for other all kinds of methods, the size reduction that corrosion EBG is brought is also
It not the biggest.
Three are the micro-strip plate that employing has high-k, dielectric-slab is the thickest: this method can be branch line coupler
Area be contracted to 1/16, but to be dielectric loss too big for one of them shortcoming of this method, so its performance drops the most significantly
Low, its another shortcoming is that requirement on machining accuracy is the highest, it is desirable to reaching micron-sized machining accuracy, therefore, this design is not
Too easily promote.
Four be the branch line to branch line coupler or parallel lines according to fractals or common meander line carry out tortuous come
Reach to subtract undersized purpose, but owing to fractals structure cannot represent with analytical expression, can only model the most piecemeal,
Motility and adjustability are poor.It addition, because branch line is different with parallel lines width, after using fractals, it is ensured that its
Each electrical length is that 90 ° of needs optimize through fine setting, and for the Fractal Geometry Model that adjustability is poor, above-mentioned optimization process is
Extremely complex and time-consuming.And the transmission line that live width is wider is carried out tortuous or fractal the most relatively difficult, additionally, tortuous or
Fractal simultaneously also bringing along bends in a large number, which increases the coupling between the discontinuity of structure and line, thus causes coupling spy
Property complicated with orthogonal phase shift characteristic optimizing process.
Summary of the invention
It is an object of the invention to the defect overcoming above-mentioned technology to exist, it is provided that the equivalent electric of a kind of CRLH transmission line structure
Line structure and method for designing thereof, propose to utilize DRC to construct CRLH transmission line structure, then utilize this transmission line structure to realize respectively
The transmission line of+90 ° of 50 Ω and+90 ° of 35 Ω, is applied to the transmission line of realization in the design of branch line coupler, is greatly reduced
The size of branch line coupler, the reduction of the method size is big, will not bring backward radiation, may be used for any frequency range, it is easy to
Integrated and encapsulation, debugging get up also to be easier, there is higher design freedom simultaneously.
Its concrete technical scheme is:
The equivalent circuit structure of a kind of CRLH transmission line structure, including CgRepresent interdigital capacitor, CfThen represent interdigital capacitor with
The edge capacitance that microstrip line is formed, L represents the line inductance of microstrip line, LcAnd CcThe resonant tank formed is produced by DRC, C except
Represent outside the line capacitance of microstrip line, also include the electric capacity that couples between DRC with microstrip line, CgIt is positioned in series resonant tank with L,
Cf、Lc、CcAnd C is positioned on shunt-resonant circuit.
The method for designing of the equivalent circuit structure of a kind of CRLH transmission line structure, specifically comprises the following steps that
Step 1: want to construct CRLH transmission line, first has to realize, in relatively low frequency range and higher frequency range, Jie of bearing respectively
Electric constant and negative pcrmeability.
Step 2: utilize interdigital structure to realize electric capacity C in series armg, utilize microstrip line construction to realize series inductance L,
So, less than series arm resonant frequencyFrequency band range in, this structure achieves negative permittivity effect, but,
Due to the introducing of interdigital structure, inevitably bring edge capacitance Cf。
Step 3: utilize microstrip line and ground to define capacity plate antenna C in parallel branch, utilizes DRC structure to define bag
Include electric capacity CcWith inductance LcAt interior resonant tank, therefore, the introducing of parallel branch brings two resonant frequencies, in the two
Resonant frequencyWithBetween, this structure achieves negative magnetoconductivity effect.
Compared with prior art, the invention have the benefit that
1, compared with the scheme utilizing lamped element reduction branch line coupler size, the method is not limited by application frequency band
System, both may apply to low frequency occasion, it is also possible to be applied to high frequency occasion.
2, compared with the scheme utilizing EBG structure reduction branch line coupler size, the method size reduction property is big, will not
Bring backward radiation, it is easy to integrated and encapsulation.
3, compared with the scheme utilizing high-k reduction branch line coupler size, the method dielectric loss is little, if
Meter degree of freedom is big.
4, compared with the scheme utilizing fractal curve or snake reduction branch line coupler size, the method modeling letter
Single, easily, design freedom is big in debugging.
Accompanying drawing explanation
Fig. 1 is CRLH transmission line structure schematic diagram based on DRC；
Fig. 2 is the S parameter simulation result of 50+90 ° of phase-shift lines of Ω, and wherein Fig. 2 (a) is the amplitude response of transmission line structure
Simulation result, Fig. 2 (b) is the phase characteristic simulation result of transmission line structure；
Fig. 3 is the S parameter simulation result of 35+90 ° of phase-shift lines of Ω, and wherein Fig. 3 (a) is the amplitude response of transmission line structure
Simulation result, Fig. 3 (b) is the phase characteristic simulation result of transmission line structure；
Fig. 4 is the test result of branch line coupler, and wherein Fig. 4 (a) is the amplitude response test knot of branch line coupler
Really, Fig. 4 (b) is the phase response test result of branch line coupler.
Detailed description of the invention
With specific embodiment, technical scheme is described in more detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, the equivalent circuit structure of a kind of CRLH transmission line structure, including CgRepresent interdigital capacitor, CfThen represent
The edge capacitance that interdigital capacitor is formed with microstrip line, L represents the line inductance of microstrip line, LcAnd CcThe resonant tank formed is by DRC
Producing, C, in addition to representing the line capacitance of microstrip line, also includes coupling electric capacity between DRC with microstrip line.At these circuit parameters
In the middle of, CgIt is positioned in series resonant tank with L, Cf、Lc、CcAnd C is positioned on shunt-resonant circuit, the position between them is closed
System is as shown in Figure 1.
The method for designing of the equivalent circuit structure of embodiment 1CRLH transmission line structure
In the present invention, the operating frequency of branch line coupler to be designed is 1GHz, for design work on that frequency
Branch line coupler, first have to separately design+90 ° of phase-shift lines of+90 ° of phase-shift lines of 50 Ω and 35 Ω, by simulation optimization,
Tables 1 and 2 sets forth the size of both phase-shift lines, Fig. 2 and Fig. 3 sets forth their S parameter simulation result.
The size of+90 ° of phase-shift lines of table 1 50 Ω
| W1(mm) | W2(mm) | W3(mm) | W4(mm) | d(mm) | L1(mm) |
| 4.05 | 3.75 | 2.15 | 1.35 | 33.3 | 11.1 |
| L2(mm) | L3(mm) | g1(mm) | g2(mm) | g3(mm) | n |
| 0.15 | 7.85 | 0.15 | 0.15 | 0.15 | 14 |
The size of+90 ° of phase-shift lines of table 2 35 Ω
| W1(mm) | W2(mm) | W3(mm) | W4(mm) | d(mm) | L1(mm) |
| 6.75 | 6.45 | 0.15 | 1.55 | 24.2 | 6.45 |
| L2(mm) | L3(mm) | g1(mm) | g2(mm) | g3(mm) | n |
| 0.15 | 6.25 | 0.15 | 0.15 | 0.15 | 23 |
From Fig. 2 and Fig. 3,50 Ω phase-shift lines | S11 |, | S21 | and Φ at 1GHz of design be respectively-
30.72dB ,-0.24dB and+90 °, 35 Ω phase-shift lines | S11 |, | S21 | and Φ at 1GHz of design be respectively-
28.14dB ,-0.28dB and+89 °.As can be seen here, the two phase-shift line has basically reached design object, can be used to construct little
Type branch line coupler.
The performance of embodiment 2 miniaturization based on DRC branch line coupler
The phase-shift line utilizing embodiment 1 to design constructs branch line coupler, this branch line coupler is carried out material object and adds
Work and experiment are measured, and Fig. 4 gives its test result, as shown in Figure 4, in the range of 0.994GHz-1.007GHz, and branch line
Bonder | S11 | is more than 10dB less than-10dB, isolation, and the Insertion loss fluctuation of 2 ports is less than 3.66 ± 0.31dB, 3 ends
The Insertion loss fluctuation of mouth is less than 0.3dB, the phase of output port less than 3.63 ± 0.23dB, the amplitude imbalance degree of output port
Potential difference is 90 ° ± 5 °.For branch line coupler superiority dimensionally in the prominent present invention, by the face of this branch line coupler
Long-pending compared with the conditional branch line bonder being operated in 1GHz, the branch line coupler area reduction in the present invention 66%, this
Outward, this branch line coupler will not bring backward radiation, it is easy to integrated and encapsulation, it addition, this structure is applicable to any frequency range, adjusts
Examination gets up to be easier, and has higher design freedom simultaneously.
The above, the only present invention preferably detailed description of the invention, protection scope of the present invention is not limited to this, any ripe
Know those skilled in the art in the technical scope of present disclosure, the letter of the technical scheme that can become apparent to
Altered or equivalence are replaced and are each fallen within protection scope of the present invention.
Claims (2)
1. the equivalent circuit structure of a CRLH transmission line structure, it is characterised in that include CgRepresent interdigital capacitor, CfThen represent
The edge capacitance that interdigital capacitor is formed with microstrip line, L represents the line inductance of microstrip line, LcAnd CcThe resonant tank formed is by DRC
Producing, C, in addition to representing the line capacitance of microstrip line, also includes the electric capacity that couples between DRC with microstrip line, CgIt is positioned at series connection with L
On resonant tank, Cf、Lc、CcAnd C is positioned on shunt-resonant circuit.
2. the method for designing of the equivalent circuit structure of a CRLH transmission line structure, it is characterised in that:
Step 1: first have to realize the dielectric constant born and the pcrmeability born respectively in relatively low frequency range and higher frequency range；
Step 2: utilize interdigital structure to realize electric capacity C in series armg, utilize microstrip line construction to realize series inductance L, little
In series arm resonant frequencyFrequency band range in, it is achieved that negative permittivity effect, due to the introducing of interdigital structure,
Bring edge capacitance Cf；
Step 3: utilize microstrip line and ground to define capacity plate antenna C in parallel branch, utilizes DRC structure to define and includes electricity
Hold CcWith inductance LcAt interior resonant tank, the introducing of parallel branch brings two resonant frequencies, in the two resonant frequencyWithBetween, it is achieved that negative magnetoconductivity effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610488389.8A CN106202634A (en) | 2016-06-28 | 2016-06-28 | The equivalent circuit structure of a kind of CRLH transmission line structure and method for designing thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610488389.8A CN106202634A (en) | 2016-06-28 | 2016-06-28 | The equivalent circuit structure of a kind of CRLH transmission line structure and method for designing thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106202634A true CN106202634A (en) | 2016-12-07 |
Family
ID=57460989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610488389.8A Pending CN106202634A (en) | 2016-06-28 | 2016-06-28 | The equivalent circuit structure of a kind of CRLH transmission line structure and method for designing thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106202634A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802408A (en) * | 2017-03-07 | 2017-06-06 | 中国人民解放军空军工程大学 | Airborne non-positive side battle array short range clutter range ambiguity suppressing method based on sparse recovery |
| CN110581334A (en) * | 2019-08-29 | 2019-12-17 | 中山大学 | Miniaturized transmission line structure based on inductance and electric capacity |
| CN111817006A (en) * | 2020-07-07 | 2020-10-23 | 西安朗普达通信科技有限公司 | Multichannel tuning decoupling chip |
-
2016
- 2016-06-28 CN CN201610488389.8A patent/CN106202634A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| MIGUEL DURAN-SINDREU 等: "Planar Multi-Band Microwave Components Based on the Generalized Composite Right/Left Handed Transmission Line Concept", 《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》 * |
| 刘双喜: "新型复合左右手传输线及其在天线中的应用", 《中国优秀硕士论文全文数据库 信息科技辑》 * |
| 王辰: "基于复合左右手传输线结构的新型多频、小型化天线研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802408A (en) * | 2017-03-07 | 2017-06-06 | 中国人民解放军空军工程大学 | Airborne non-positive side battle array short range clutter range ambiguity suppressing method based on sparse recovery |
| CN106802408B (en) * | 2017-03-07 | 2020-05-26 | 中国人民解放军空军工程大学 | Airborne non-positive side array short range clutter distance fuzzy suppression method based on sparse recovery |
| CN110581334A (en) * | 2019-08-29 | 2019-12-17 | 中山大学 | Miniaturized transmission line structure based on inductance and electric capacity |
| CN111817006A (en) * | 2020-07-07 | 2020-10-23 | 西安朗普达通信科技有限公司 | Multichannel tuning decoupling chip |
| CN111817006B (en) * | 2020-07-07 | 2021-12-21 | 西安朗普达通信科技有限公司 | Multichannel tuning decoupling chip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101986456A (en) | Ultra wide band filter with trap characteristics | |
| CN106202634A (en) | The equivalent circuit structure of a kind of CRLH transmission line structure and method for designing thereof | |
| CN204289663U (en) | A kind of millimeter wave filter adopting frequency selectivity coupling to carry out Fundamental wave suppression | |
| Kordiboroujeni et al. | Mode matching design of substrate integrated waveguide diplexers | |
| Letavin et al. | Compact microstrip branch-line coupler with unequal power division | |
| Alhalabi et al. | Miniaturized branch-line coupler based on slow-wave microstrip lines | |
| CN104241743A (en) | Millimeter wave filter adopting frequency selectivity coupling for suppressing fundamental waves | |
| Phan et al. | Simple miniaturized Wilkinson power divider using a compact stub structure | |
| Xia et al. | A new dual band balanced-to-balanced power divider | |
| Rui et al. | Design and simulation of a W-band two-way power divider based on substrate integrated waveguide | |
| Chen et al. | A microstrip dualband bandstop filter with dualband bandstop resonators | |
| Cheng et al. | A W-band quadrature hybrid coupled substrate integrated waveguide diplexer | |
| CN104051831A (en) | Small ultra-wide band filter | |
| Chinig et al. | A novel design of an H-shaped microstrip diplexer | |
| Wang et al. | A software configurable coupler with programmable coupling coefficient | |
| CN106025472B (en) | A kind of structure and its design method of CRLH branch line coupler | |
| Roshani et al. | Design of a Microwave Lowpass–Bandpass Filter using Deep Learning and Artificial Intelligence | |
| Lu et al. | Miniature 60‐GHz‐band bandpass filter with 2.55‐dB insertion‐loss using standard 0.13 μm CMOS technology | |
| Xu et al. | Compact, broadband waveguide-to-CPWG transition operating around 300 GHz | |
| US20200203795A1 (en) | Directional Coupler and Method for Manufacturing the Same as Well as Radio Transmitter and Radio Device | |
| Hu et al. | Equivalent circuit modeling of chassis-antenna with two coupling elements | |
| Bautista et al. | Design of on-chip quadrature hybrid (3dB) branch-line couplers in 0.13-μm SiGe technology for millimetre-wave applications | |
| Hamzah et al. | Microstrip-to-parallel strip transition balun integrated with stubs and dgs for 3-d harmonic Suppressed dipole antenna | |
| Gong et al. | Analysis and design of a wideband lumped-element quadrature directional coupler for complementary metal-oxide semiconductor implementation | |
| Chen et al. | A planar filtering crossover utilizing full-wavelength ring resonators |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161207 |