CN206147014U - Dielectric dielectric constant microwave measuring device - Google Patents
Dielectric dielectric constant microwave measuring device Download PDFInfo
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- CN206147014U CN206147014U CN201621204145.4U CN201621204145U CN206147014U CN 206147014 U CN206147014 U CN 206147014U CN 201621204145 U CN201621204145 U CN 201621204145U CN 206147014 U CN206147014 U CN 206147014U
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Abstract
The utility model discloses a dielectric dielectric constant microwave measuring device, including the hybrid ring that a groove line knot constructs, this hybrid ring includes input port, keeps apart port and two homophase output port, and hybrid ring quarter wavelength part is the line of rabbet joint, wherein input port and two homophase output port all adopt symmetrical coplanar waveguide transmission line to the symmetry is with being loaded with multiunit array detail on two homophase output port's middle conduction band, and the coplanar waveguide transmission line that this array detail was opened a way by the terminal constructs, the homophase output port who opens a way from input port to two terminals forms two signal transmission branch roads, and wherein the signal transmission of one side props up and is equipped with the plastic tubing that holds the solution that awaits measuring on the road, keep apart the port and adopt the line of rabbet joint, and adopt the ba lun that etching process makes to be had with groove line coplanar, accomplish the conversion of balance / non - balanced signal. The utility model provides a measuring device measures for the dual -port, can avoid the problem of separating more, therefore its dielectric constant's measuring result is more accurate reliable.
Description
Technical field
The utility model belongs to dielectric constant microwave measurement apparatus technical field, and in particular to a kind of dielectric Constant
MMU microwave measurement unit.
Background technology
The dielectric constant of material is always a basis in the research of material and microwave interactive and important problem.With
Carrying out the method for Measuring Dielectric Constant has a lot, can be largely classified into the resonance method and disresonance method.Wherein disresonance method is relatively easy,
In disresonance method, transmission-shooting method is widely used in wide-band width measurement, or even is used to measure low-loss material
Dielectric constant.This measuring method is the amplitude and the letter of phase place by the scattering parameter of test device before and after loading measured object
Breath, by complicated De- embedding or inversion algorithm the calculating and extraction of material dielectric constant are completed.Must essence when therefore measuring
Really obtain scattering parameter.Especially when two kinds of mediums dielectric constant closely when, the information of measured scattering parameter
Also can closely, traditional output-bounce technique cannot precisely distinguish the information of these minor variations such as shaft centerline measurement, so as to shadow
The judgement to material dielectric property is rung.The utility model provides a kind of based on mixing ring structure output port open-end
New measurement apparatus, using two-way comparison method measurement sensitivity is improved, and is realized and is distinguished dielectric constant minor variations information
Test.
The content of the invention
The technical problem that the utility model is solved there is provided a kind of electricity based on mixing ring structure composite terminal open circuit and be situated between
Matter dielectric constant microwave measurement apparatus, the measurement apparatus are by two output port ends of broadband mixing ring plus mounted terminal
The array additional structure of the detail composition of open circuit is carried in two output ends come what is constituted using the detail structure of open-end
On mouth, so as to constitute the new structure that array structure form is constituted together with the mixing ring that two output ports are opened a way, raising is reached
The purpose of whole measurement apparatus dielectric constant measurement sensitivity.
The utility model adopts the following technical scheme that dielectric Constant microwave measurement is filled to solve above-mentioned technical problem
Put, it is characterised in that including the mixing ring of a slot line structure, the mixing ring includes setting input port, isolated port and two
In-phase output end mouth, mixing ring quater-wave section be connected with each port using the line of rabbet joint, wherein input port and two it is defeated
Exit port adopts symmetrical coplanar waveguide transmission line, and asymmetrical load has many group patterns on the middle conduction band of two output ports
Detail, the array detail is constructed by the coplanar waveguide transmission line of open-end, from input port to the homophase of two open-ends
Output port forms two bars transmission branches, and the signal transmission branch road of wherein side is provided with the modeling for holding solution to be measured
Expects pipe, isolated port adopts the microwave line of rabbet joint.In test process, input port and isolated port are respectively by sub-miniature A connector and vector
Network Analyzer is connected.
Further preferably, described isolated port is made using etching technics the balun coplanar with the microwave line of rabbet joint, completes
Balance between coaxial interface and slot line structure/non-equilibrium signal conversion.
The utility model has the advantages that compared with prior art：The two of the new structure that the utility model is provided
The mixing ring measurement apparatus of individual in-phase output end mouth terminal open circuit and array of loading detail, in measurement apparatus same volume is kept
Under experiment condition, the solution to be measured of variable concentrations is measured, the measurement apparatus are explored using FEM numerical algorithms and perceives Jie
The limit of the faint change information of electric constant, its sensitivity is significantly larger than conventional transmission line method, and with the coaxial line of single port
Measuring method is compared, the utility model proposes measurement apparatus be dual-port measurement, many solution problems can be avoided, thus its dielectric is normal
Several measurement results is more accurate reliable.
Description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of the mixing ring of output port open circuit and array of loading detail in the utility model；
Fig. 3 is that scattering parameter is illustrated when the mixing annular space of output port open circuit and array of loading detail in the utility model is carried
Figure；
Fig. 4 is that scattering parameter is illustrated when the mixing ring of output port open circuit and array of loading detail in the utility model is loaded
Figure.
In figure：1st, vector network analyzer, 2, plastic tube, 3, solution to be measured, 4, input port, 5, isolated port, 6, same
Phase output terminal mouth, 7, array detail, 8, the line of rabbet joint, 9, sub-miniature A connector, 10, transmission line, 11, reference line, 12, balun.
Specific embodiment
The above of the present utility model is described in further details by the following examples, but this should not be understood
Scope for the above-mentioned theme of the utility model is only limitted to below example, all skills realized based on the utility model the above
Art belongs to scope of the present utility model.
As shown in Figure 1-2, dielectric Constant MMU microwave measurement unit, including the mixing ring of a slot line structure, this is mixed
Cyclization includes being arranged at input port 4 and isolated port 5 and two in-phase output end mouths 6, mixes ring quater-wave section
It is connected with each port using the line of rabbet joint 8, wherein input port 4 and two in-phase output end mouths 6 adopt symmetrical coplanar wave guide transmission
Line, asymmetrical load has many group pattern details 7 on the middle conduction band of in-phase output end mouth 6, and the array detail 7 is open-end
Coplanar waveguide structure, from the in-phase output end mouth 6 of 4 to two open-ends of input port two bars transmission branches are formed, its
The signal transmission branch road of middle side is provided with the plastic tube 2 for holding solution to be measured 3, and isolated port 5 adopts the microwave line of rabbet joint,
Isolated port 5 is made using etching technics the balun 12 coplanar with the line of rabbet joint, completes flat between coaxial interface and slot line structure
Weighing apparatus/non-equilibrium signal is changed.Balun 12 and input port 4 are respectively by sub-miniature A connector 9 and vector network analyzer in test process
1 is connected.
Using finite element（FEM）Numerical method is simulated to whole measurement apparatus, builds such as Fig. 2 institutes according to actual size
The measurement apparatus model structure shown, simulates respectively the mixing ring of two in-phase output end mouths 6 open circuit and array of loading detail 7 not
Scattering parameter during any solution to be measured is placed, as shown in Figure 3.
Ideally, microwave signal is input into by input port 4, and the most of signal constant amplitude of Jing quarter-waves conversion is same
Mutually reach two in-phase output end mouths 6, the output of the no signal of isolated port 5.To be exported by the signal transmission of input port 4 to homophase
Two bars transmission branches of port 6 are referred to as transmission line 10 and reference line 11.When by the ethanol solution of variable concentrations
When being positioned in the plastic tube 2 in transmission line 10, equivalent to introducing discontinuity structure, original letter in measurement apparatus
Number transmission poised state will be broken so that the input port 4 of measurement apparatus and isolated port 5 scattering parameter information occur
Change, the utility model exactly calculates the dielectric constant of solution 3 to be measured according to these change informations.
It is this coaxial because the interface being connected with vector network analyzer 1 is characterized the coaxial line interface that impedance is 50 Ω
Line interface is the standard interface of most of instruments and signal generator.Balance due to being coaxially unbalanced interface and slot line structure
Transmission characteristic is mismatched, and needs to adopt balance/non-equilibrium conversion between coaxial interface and slot line structure.The utility model is given
Broadband range inner equilibrium/non-equilibrium conversion balun, i.e., being made using etching technics according to different parameters has micro- with isolated port 5
The coplanar balun 12 of wave trough line, so as to reach best match effect, completes the conversion of balance/non-equilibrium signal.
In order to verify the utility model proposes in-phase output end mouth 6 open circuit and array of loading detail 7 mixing ring measurement
Device is perceiving the validity of dielectric constant minor variations, and below by embodiment the measurement of some correlations has been carried out, and will rub
You are respectively 0.05 (x1 at concentration）, 0.09 (x2), the ethanol solution of 0.12 (x3) and 0.14 (x4) be respectively placed in above-mentioned modeling
In expects pipe 2, the scattering parameter information of its measurement apparatus for calculating is as shown in figure 4, from Fig. 4（a）With（b）As can be seen that when measurement
When device puts solution 2 to be measured, the scattering parameter of the port of whole measurement apparatus there occurs significantly change.And Fig. 4 also says
The minimum molar concentration difference for understanding the appreciable ethanol solution of the measurement apparatus is 0.02.Show the utility model proposes homophase is defeated
The mixing ring measurement apparatus of the open circuit of exit port 6 and array of loading detail 7 perceive the faint of dielectric constant in broadband in microwave band
Change is highly effective.
Research shows, the method for testing for taking two circuits to compare.I.e. one is reference line 11, places refer to material thereon
Material, another is transmission line 10, and measured material is placed thereon, is greatly improved measurement sensitivity.The utility model need not appoint
What reference substance, described reference substance is identical with measured object to be referred to whole measurement apparatus and not to place task material（It is unloaded）, as general
Referred to as load when measured object is positioned in plastic tube, the utility model is by scattering parameter in the case of unloaded and two kinds of load
Contrast, and then obtain the dielectric constant of solution to be measured.And the measurement apparatus that the utility model is proposed are exported in two homophases
The end array of loading detail 7 of port 6, which increase effect of the electromagnetic field to solution to be measured, and the sensitive dielectric constant that perceives
The faint scattering parameter information that minor variations cause, therefore the sensitivity of whole measurement apparatus can be increased substantially.
Embodiment above describes general principle of the present utility model, principal character and advantage, the technical staff of the industry
It should be appreciated that the utility model is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification is originally
The principle of utility model, under the scope without departing from the utility model principle, the utility model also has various changes and modifications,
These changes and improvements are each fallen within the range of the utility model protection.
Claims (2)
1. dielectric Constant MMU microwave measurement unit, it is characterised in that including the mixing ring of a slot line structure, the mixing ring
Including input port, isolated port and two in-phase output end mouths；Mixing ring quater-wave section is using the line of rabbet joint and each end
Mouth is connected, and wherein input port and two in-phase output end mouths adopt symmetrical coplanar waveguide transmission line, and defeated in two homophases
Asymmetrical load has many group pattern details on the middle conduction band of exit port, the array detail by open-end coplanar waveguide transmission line
Construction；Two bars transmission branches, the wherein letter of side are formed from input port to the in-phase output end mouth of two open-ends
Number transmission branch is provided with the plastic tube for holding solution to be measured；Isolated port adopts the line of rabbet joint, input port in test process
And isolated port is connected respectively by sub-miniature A connector with vector network analyzer.
2. dielectric Constant MMU microwave measurement unit according to claim 1, it is characterised in that：Described isolated port
Being made using etching technics has the balun coplanar with the line of rabbet joint, completes the balance/non-equilibrium letter between coaxial interface and slot line structure
Number conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621204145.4U CN206147014U (en) | 2016-11-08 | 2016-11-08 | Dielectric dielectric constant microwave measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621204145.4U CN206147014U (en) | 2016-11-08 | 2016-11-08 | Dielectric dielectric constant microwave measuring device |
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| CN206147014U true CN206147014U (en) | 2017-05-03 |
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| CN201621204145.4U Expired - Fee Related CN206147014U (en) | 2016-11-08 | 2016-11-08 | Dielectric dielectric constant microwave measuring device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069173A (en) * | 2017-06-09 | 2017-08-18 | 中国科学技术大学 | Quantum chip, quantal data bus, microwave transmission line resonator and preparation method |
| CN108088858A (en) * | 2017-12-18 | 2018-05-29 | 河南师范大学 | A kind of double-frequency broadband microwave remote sensor |
| CN108226650A (en) * | 2017-12-18 | 2018-06-29 | 河南师范大学 | A kind of broadband dielectric constant measuring apparatus |
| CN108226651A (en) * | 2017-12-18 | 2018-06-29 | 河南师范大学 | Measured zone electric-field enhancing type dielectric constant measuring apparatus |
| CN108267642A (en) * | 2017-12-18 | 2018-07-10 | 河南师范大学 | A kind of microfluid electrical characteristics microwave detecting device |
| CN109374691A (en) * | 2018-10-19 | 2019-02-22 | 沈阳师范大学 | The device and method of microwave measurement graphite alkenes Dielectric constant changing rule |
| CN113970670A (en) * | 2021-09-29 | 2022-01-25 | 西安电子科技大学 | Foil strip air-mixed dielectric constant measuring method |
-
2016
- 2016-11-08 CN CN201621204145.4U patent/CN206147014U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069173A (en) * | 2017-06-09 | 2017-08-18 | 中国科学技术大学 | Quantum chip, quantal data bus, microwave transmission line resonator and preparation method |
| CN107069173B (en) * | 2017-06-09 | 2020-08-28 | 中国科学技术大学 | Quantum chip, quantum data bus, microwave transmission line resonant cavity and preparation method |
| CN108226651A (en) * | 2017-12-18 | 2018-06-29 | 河南师范大学 | Measured zone electric-field enhancing type dielectric constant measuring apparatus |
| CN108226650A (en) * | 2017-12-18 | 2018-06-29 | 河南师范大学 | A kind of broadband dielectric constant measuring apparatus |
| CN108267642A (en) * | 2017-12-18 | 2018-07-10 | 河南师范大学 | A kind of microfluid electrical characteristics microwave detecting device |
| CN108088858A (en) * | 2017-12-18 | 2018-05-29 | 河南师范大学 | A kind of double-frequency broadband microwave remote sensor |
| CN108226650B (en) * | 2017-12-18 | 2023-04-11 | 河南师范大学 | Broadband dielectric constant measuring device |
| CN108267642B (en) * | 2017-12-18 | 2023-06-06 | 河南师范大学 | Micro-fluid electric characteristic microwave detection device |
| CN108226651B (en) * | 2017-12-18 | 2023-06-06 | 河南师范大学 | Measurement area electric field enhanced dielectric constant measurement device |
| CN109374691A (en) * | 2018-10-19 | 2019-02-22 | 沈阳师范大学 | The device and method of microwave measurement graphite alkenes Dielectric constant changing rule |
| CN109374691B (en) * | 2018-10-19 | 2020-10-30 | 沈阳师范大学 | Device and method for measuring dielectric constant change rule of graphene solution by microwave |
| CN113970670A (en) * | 2021-09-29 | 2022-01-25 | 西安电子科技大学 | Foil strip air-mixed dielectric constant measuring method |
| CN113970670B (en) * | 2021-09-29 | 2022-08-09 | 西安电子科技大学 | Foil strip air-mixed dielectric constant measuring method, system, equipment, medium and terminal |
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| CF01 | Termination of patent right due to non-payment of annual fee |