CN105929246A - Closed coaxial transmission line test system and method for representing dielectric property of sample to be tested - Google Patents
Closed coaxial transmission line test system and method for representing dielectric property of sample to be tested Download PDFInfo
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- CN105929246A CN105929246A CN201610272097.0A CN201610272097A CN105929246A CN 105929246 A CN105929246 A CN 105929246A CN 201610272097 A CN201610272097 A CN 201610272097A CN 105929246 A CN105929246 A CN 105929246A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
- G01R27/2623—Measuring-systems or electronic circuits
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Abstract
The invention discloses a closed coaxial transmission line test system for testing dielectric property of liquid and solid materials. The closed coaxial transmission line test system comprises a test fixture, a vector network analyzer, a computer and a test connection line. The test fixture comprises a both-way SMA connector, screws, waterproof rubber washers, adapters, the two ends of each of which are opened and which are in a communication structure, a sample room having an electromagnetic shielding effect, a sample indoor conductor and a sample to be tested. The both-way SMA connector is formed by four-hole flanges, columnar cylindrical polytetrafluoroethylene and both-way SMA connector dual-female-connector coaxial inner conductors. Based on the organic combination of a transmission reflection method and de-embedding technology, test parasitic effect of a fixture interface is eliminated under the condition of not depending on a special customized calibration device or not carrying out complex mathematical modeling, thereby realizing accurate measurement of the dielectric property of the liquid and solid materials; processing requirement for the test sample is low; the fixture installation is simple; test work frequency range is flexible to expend; and application range is wide.
Description
Technical field
The invention belongs to microwave test field, relate to Jie for fluent material, solid or solid powder material
The sign of electrical characteristics, particularly to a kind of Guan Bi coaxial transmission line characterizing liquid and solid material dielectric property
Test system.
Background technology
The dielectric property of material is the electric characteristic that every kind of material is exclusive, for the accurate survey of dielectric material characteristic
Measure most important for the appropriate use of material with sign.By the grasp to dielectric material characteristic, Ke Yiwei
Many electronic application provide crucial design parameter information, by dielectric material characteristic is understood in depth,
The application in the fields such as the design of food safety detection, armarium and use, Aero-Space design brings help,
The efficiency improving industry product design, flow quality is checked is helped by the dielectric property grasping material fast and accurately
Benefit is much.
For the measurement of dielectric material characteristic, mainly there are coaxial probe method, coaxial/waveguide collimation method, freedom
Space law, parallel plate method resonant cavity method.Coaxial transmission collimation method has broadband measurement because of it
(50MHz-60GHz), relatively low to test sample processing request, it is suitable for test sample wide variety, test is fast
Speed and result accurately and extraordinarily receive publicity, but owing to Guan Bi coaxial transmission wire holder needs to connect instrument,
Its adaptor is the most essential, thus because the ghost effect of joint is to test knot in final testing result
The accuracy of fruit causes the impact that can not be ignored.Existing bearing calibration is that the specific dimensions according to fixture is fixed
Make corresponding calibrating device, or eliminate joint at S by the S parameter of complicated mathematical modeling simulation joint
Ghost effect in parameter.The calibrating device restricted application of customization, cost is high, can not the while of modeling time-consuming
Remove joint impact completely.Before existing De-embedding technology can be implemented in acquisition fixture joint S parameter
Put the effect realizing that test is gone ghost effect, but rarely have the concrete method being simply available for realizing.
Prior art " a kind of coaxial holder testing material electromagnetic property " (application number 201420584461.3),
The probe assembly program carrying out testing is complicated, and labyrinth is unfavorable for ensureing test result accuracy, can simultaneously
The flow process making sample test lengthens, and is unfavorable for the quick test of sample, and fixing adaptor type is unfavorable for surveying
The extension of examination frequency.Prior art " the broadband alternating temperature dielectric constant test of solid and dusty material " (application
Numbers 201510305197.4), its for the coupling effect in the test of test fixture be removed by traditional
TRL calibrating mode realizes, and needs to customize specific dimensions calibrating device, and the making of calibrating device requires high, greatly
Improve greatly production cost, the result simultaneously calibrated can not well ensure, this test system can not be right simultaneously
Fluid sample dielectric property is tested.
Summary of the invention
Produce in test process for coaxial transmission wire testing method test fixture center tap in prior art
Ghost effect is difficult to remove, and application frequency range is required higher by fc-specific test FC material, specific coaxial transmission
Wire holder working range is limited, the problem of test frequency range extension difficulty.The present invention provides a kind of and characterizes liquid
The Guan Bi coaxial transmission line test system of body and solid material dielectric property, specifically a kind of Guan Bi coaxial transmission
Line is popped one's head in, and this Guan Bi coaxial transmission line test system compensation result is accurate, and test frequency range is available for extension
Test system, it is achieved the measurement to the dielectric property of test sample material.
In order to realize purpose, the technical scheme is that
A kind of Guan Bi coaxial transmission line test system characterizing liquid and solid material dielectric property, this Guan Bi is same
Axle transmission line test system includes test fixture, vector network analyzer 9, computer 10 and test connecting line
11；Test fixture includes two-way sub-miniature A connector, screw 4, waterproof rubber gasket 5, both ends open connectivity structure
Adaptor 6, there is the sample room 7 of electromagnetic shielding effect, sample room inner wire 8 and testing sample.
Two-way sub-miniature A connector side is by the double female coaxial inner conductor 3 of two-way sub-miniature A connector and sample room inner wire 8
Grafting is connected, and is connected with adaptor 6 screwed by screw thread, and passes through screw 4 via two-way sub-miniature A connector
Whole two-way sub-miniature A connector is fixed on adaptor 6, separately by outer conductor double end SMA thread belt four hole flange 1
Side is connected with vector network analyzer 9 corresponding ports by test connecting line 11；The other end of adaptor 6
Engaged with sample room 7 by inner hole thread, be annular groove at inner hole thread end, anti-in order to install annular
Water rubber washer 5.The two ends female dimension reference sub-miniature A connector of the double female coaxial inner conductor 3 of two-way sub-miniature A connector
Female inner wire size makes, the two ends female size of the double female coaxial inner conductor 3 of the most two-way sub-miniature A connector with
Sub-miniature A connector female inner wire is identical, all contains the symmetrical cylindrical hole caved in that cracks, and hole terminal is coaxial taper
Hole.Vector network analyzer 9 is connected, to be measured with Guan Bi coaxial transmission wire holder by test connecting line 11
Sample is tested；Computer 10 is connected with vector network analyzer 9, carries out data acquisition and computational analysis.
Being threaded connection adaptor 6 at the two-port of described dual-end tubular sample room 7, internal toroidal cavities is put
Put testing sample.
Described two-way sub-miniature A connector is by four hole flanges 1, column tubular politef 2 and two-way sub-miniature A connector
Double female coaxial inner conductors 3 are constituted；Two-way sub-miniature A connector is female, and female two ends are external screw thread.Institute
The column tubular politef 2 stated be filled in the double female of four hole flanges 1 and two-way sub-miniature A connector coaxially in lead
Between body 3, the interior diameter of column tubular politef 2 equal to the double female of two-way sub-miniature A connector coaxially in lead
The diameter of body 3, overall diameter connects equal to two-way SMA equal to the interior diameter of two-way sub-miniature A connector outer conductor, length
The length of the double female coaxial inner conductor 3 of head.Double for two-way sub-miniature A connector female coaxial inner conductors 3 are inserted and adds
The column tubular politef 2 that work is good, then inserts two-way sub-miniature A connector outer conductor by the entirety assembled double
Head SMA thread belt four hole flange 1, constitutes two-way sub-miniature A connector.
Described sample room inner wire 8 two ends are contact pin, and its size female double with two-way sub-miniature A connector is coaxially interior
The female matching size at conductor 3 two ends closes, and sample room inner wire 8 removes principal length and the sample room 7 of contact pin
Equal, main body portion diameter female coaxial inner conductor 3 equal diameters double with two-way sub-miniature A connector, in sample room
Conductor 8 inserts in the coaxial bellmouth of the double female coaxial inner conductor 3 of two-way sub-miniature A connector；Sample room inner wire 8,
Two-way sub-miniature A connector inner wire 3 is on same axis with loop sample room 7, and testing sample is placed in double
Between two adaptors 6 that sub-miniature A connector connects.Described sample room is dual-end loop sample room,
Internal toroidal cavities is in order to hold testing sample.
Described two-way sub-miniature A connector, sample room 7, adaptor 6, the double female of two-way sub-miniature A connector coaxially in lead
Body 3 and sample room inner wire 8 are austenite 304 rustless steel, can effectively reduce test sample to test
The corrosion and damage of system, simultaneously because material is non magnetic, it is also possible to be prevented effectively from test system own material
Example dielectric characteristic is tested the impact brought.Two-way sub-miniature A connector 1 and the inner surface of sample room 7, SMA connects
The surface of head inner wire 3 and sample room inner wire 8 is required to polishing, to ensure test microwave signal transmission
Stable.
Described testing sample is liquid or solid material, and testing sample is placed in and connects with two-way sub-miniature A connector
Between two adaptors.Testing sample is filled up completely with in sample room, in testing sample is internal diameter and sample room
Conductor diameter is equal, and external diameter is equal with sample room interior diameter, the cylindricality tubular that length is equal with sample room length,
So that the accurate measurement of example dielectric characteristic, then directly one is being installed for pressed powder or fluid sample
The fixture of side adaptor is filled with.
The method using above-mentioned Guan Bi coaxial transmission line test characterized systematically testing sample dielectric property, specifically wraps
Include following steps:
The first step, setup test instrument, gather data
Computer is connected with vector network analyzer, obtains the data from test instrunment；Test is connected
Line connects with vector network analyzer corresponding ports, carries out vector network analyzer complete double with standard calibration part
Port corrects, and preserves correction data in vector network analyzer after correction.
Second step, tests the S parameter of two-way sub-miniature A connector
Two-way sub-miniature A connector is connected with the test connecting line of vector network analyzer dual-port, by two-way
Sub-miniature A connector carries out sweep check and obtains full S parameter S of two-way sub-miniature A connectora 11、Sa 21、Sa 12、Sa 22, and will
The data that vector network analyzer records are saved in computer, are obtained the S of two-way sub-miniature A connector by reality test
Parameter.
3rd step, assembling test fixture, testing sample is put into sample room
Start from the side of test fixture to assemble, two-way sub-miniature A connector be connected with adaptor side and screw,
With screw, sub-miniature A connector is fixed with adaptor, at the inner hole thread end that adaptor opposite side engages with sample room
Waterproof rubber gasket is put in tail annular groove.
Sample room inner wire is connected by the opposite side of test fixture with two-way sub-miniature A connector, then by two-way SMA
Joint screw in adaptor correspondence connect sub-miniature A connector side screw thread in, after screwing with screw by sub-miniature A connector with
Adaptor is fixed, it is ensured that during later stage fixture connecting test line, sub-miniature A connector will not occur additional rotation；Adaptor
Connect with product room and screw, and putting into waterproof rubber gasket.
4th step, tests testing sample
The test connecting line at test fixture two ends with connected vector Network Analyzer two-port is connected and screws,
Testing sample is carried out sweep check, and the dual-port population parameter S of test fixture that will recordm 11、Sm 21、Sm 12、
Sm 22Importing computer preserves.
5th step, removes test ghost effect, calculates dielectric property parameter
By full S parameter S that second step is recordeda 11、Sa 21、Sa 12、Sa 22And the 4th pacing obtain full S ginseng
Number Sm 11、Sm 21、Sm 12、Sm 22It is transmitted scattering parameter conversion and obtains corresponding T parameter Ta 11、Ta 12、Ta 21、
Ta 22With corresponding Tm 11、Tm 21、Tm 12、Tm 22；Calculate the two-way sub-miniature A connector of removal by chain type transmission matrix to bring
Test ghost effect, obtain T parameter T of purely testing sampled 11、Td 21、Td 12、Td 22, and then pass through matrix
Conversion obtains full S parameter S that test sample is correspondingd 11、Sd 21、Sd 12、Sd 22；Utilize the testing sample obtained complete
S parameter by transmission bounce technique inverting i.e. can get sample dielectric property, described dielectric property includes multiple
Dielectric constant, complex permeability, sample loss tangent or quality factor.
Based on transmission bounce technique and the combination of De-embedding technology, it is being independent of exclusive customization calibrating device or right
Fixture carries out removing in the case of complex mathematical modeling the test ghost effect of fixture interface, it is achieved to liquid with
The accurate measurement of solid material dielectric property.
Beneficial effects of the present invention:
1) it is designed to and vector network analyzer test connection joint size, spiral shell due to fixture blank area
The bidirectional joint that stricture of vagina is corresponding with inner wire, can be obtained the scattering parameter of joint, pass through by directly test
The matrixing of corresponding test result and computing the most removable coaxial transmission line method fixture center tap test parasitism effect
Should, the removal of joint ghost effect during transmission bounce technique test sample dielectric property be need not depend on
Customize specific calibrating device according to the size of fixture, tackle different joint categories, be independent of setting up complicated number
Learning model and remove the additional testing impact of joint, minimizing technology feasibility is good, goes division result accurately and reliably.
2) test material can be liquid, solid or pressed powder；It is available for the abundant species of test, is suitable for model
Enclose wide, test sample process is required low.
3) extension of test frequency range can be by fixture bidirectional joint type and counter sample room coaxial inner conductor
Mode realize.The test fixture that sub-miniature A connector connects can realize the test of 1MHz-18GHz scope, by two-way
Joint categories is changed to SSMA from SMA can expand to 38GHz by test upper frequency limit, is changed to GPO, OSMP, SMP
One can by test frequency range expand to 40GHz.The extension of test job frequency range is flexible, the scope of application
Wide feature.
4) integrated testability operating process is short, and fixture is installed succinct, and simple to operate, test repeatability is good.
Accompanying drawing explanation
Fig. 1 is that test fixture obtains cross-sectional structure schematic diagram；
Fig. 2 is the test device system schematic diagram of the present invention；
Fig. 3 is two-way sub-miniature A connector structure sectional view；
Fig. 4 is two-way sub-miniature A connector structure left view；
Fig. 5 is adapter structure sectional view；
Fig. 6 is adapter structure left view；
Fig. 7 is adapter structure right view；
Fig. 8 is sample room coaxial inner conductor structural representation；
Fig. 9 is sample room structural representation；
In figure: 1 four hole flanges；2 column tubular politef；The double female of 3 two-way sub-miniature A connectors is coaxially interior
Conductor；4 screws；5 waterproof rubber gaskets；6 adaptors；7 sample rooms；8 sample room inner wires；9 vectors
Network Analyzer；10 computers；11 test connecting lines.
Detailed description of the invention
For realizing above effect, with embodiment, invention is further described below in conjunction with the accompanying drawings:
A kind of Guan Bi coaxial transmission line test system characterizing liquid and solid material dielectric property, such as Fig. 2 institute
Show, including test fixture, vector network analyzer 9, computer 10 and test connecting line 11；Test fixture
Cross-sectional structure schematic diagram as it is shown in figure 1, test fixture includes two-way sub-miniature A connector (Fig. 3,4), screw
4, waterproof rubber gasket 5, the adaptor 6 (such as Fig. 5,6,7) of both ends open connectivity structure, there is electromagnetic screen
Cover the sample room 7 (such as Fig. 9) of effect, sample room inner wire 8 (such as Fig. 8) and testing sample.
Described two-way sub-miniature A connector is by four hole flanges 1, column tubular politef 2 and two-way sub-miniature A connector
Double female coaxial inner conductors 3 are constituted；Two-way sub-miniature A connector is female, and female two ends are external screw thread.Will
The double female coaxial inner conductor 3 of two-way sub-miniature A connector inserts manufactured column tubular politef 2, then
The entirety assembled is inserted two-way sub-miniature A connector outer conductor double end SMA thread belt four hole flange 1, constitutes two-way
Sub-miniature A connector；
Two-way sub-miniature A connector side is by the double female coaxial inner conductor of two-way sub-miniature A connector and sample room inner wire 8
Grafting is connected, and is connected with adaptor 6 screwed by screw thread, and passes through screw 4 via two-way sub-miniature A connector
Whole two-way sub-miniature A connector is fixed on adaptor 6, separately by outer conductor double end SMA thread belt four hole flange 1
Side is connected with vector network analyzer 9 corresponding ports by test connecting line 11；The other end of adaptor 6
Engaged with sample room 7 by inner hole thread, be annular groove at inner hole thread end, anti-in order to install annular
Water rubber washer 5.The two ends female dimension reference sub-miniature A connector of the double female coaxial inner conductor 3 of two-way sub-miniature A connector
Female inner wire size makes, and all contains the symmetrical cylindrical hole caved in that cracks, and hole terminal is coaxial bellmouth.
Vector network analyzer 9 is connected, to testing sample with Guan Bi coaxial transmission wire holder by test connecting line 11
Test；Computer 10 is connected with vector network analyzer 9, carries out data acquisition and computational analysis.
The method using above-mentioned Guan Bi coaxial transmission line test characterized systematically testing sample dielectric property, specifically wraps
Include following steps:
The first step, setup test instrument, gather data
Computer 10 is connected with vector network analyzer 9, obtains the data from test instrunment；Will test
Connecting line 11 connects with vector network analyzer 9 corresponding ports, with standard calibration part to vector network analyzer
9 carry out full dual-port correction, preserve correction data in vector network analyzer 9 after correction.
Second step, tests the S parameter of two-way sub-miniature A connector
The p-wire 11 of two-way sub-miniature A connector with vector network analyzer 9 dual-port is connected, by two-way
The sweep check of sub-miniature A connector obtains full S parameter S of two-way sub-miniature A connectora 11、Sa 21、Sa 12、Sa 22, and will vow
The data that amount Network Analyzer 9 records are saved in computer 10, obtain two-way sub-miniature A connector by reality test
S parameter.
3rd step, assembling test fixture
Start from the side of test fixture to assemble, two-way sub-miniature A connector be connected with adaptor 6 side and screw,
With screw 4, sub-miniature A connector is fixed with adaptor 6, in adaptor 6 opposite side engages with sample room 7
Waterproof rubber gasket 5 is put in the annular groove of screw thread end, hole.
Sample room inner wire 8 is connected by the opposite side of test fixture with two-way sub-miniature A connector, then by two-way SMA
Joint screws in the corresponding side screw thread connecting sub-miniature A connector of adaptor 6, is connect by SMA with screw 4 after screwing
Head is fixed with adaptor 6, it is ensured that during later stage fixture connecting test line, sub-miniature A connector will not occur additional rotation；
Adaptor 6 connects with product room 7 and screws, and puts into waterproof rubber gasket 5.
Testing sample is put into sample room 7, the adaptor 6 assembled is connected with sample room 7 and revolves
Tightly.
4th step, tests testing sample
The p-wire 11 at test fixture two ends with connected vector Network Analyzer 9 two-port is connected and screws,
Testing sample is carried out sweep check, and the fixture dual-port population parameter S that will recordm 11、Sm 21、Sm 12、Sm 22Lead
Enter computer 10 to preserve.
5th step, removes test ghost effect and calculates dielectric property parameter
By full S parameter S that second step is recordeda 11、Sa 21、Sa 12、Sa 22And the 4th pacing obtain full S ginseng
Number Sm 11、Sm 21、Sm 12、Sm 22It is transmitted scattering parameter conversion and obtains corresponding T parameter Ta 11、Ta 12、Ta 21、
Ta 22With corresponding Tm 11、Tm 21、Tm 12、Tm 22；Calculate the two-way sub-miniature A connector of removal by chain type transmission matrix to bring
Test ghost effect, obtain T parameter T of purely test sampled 11、Td 21、Td 12、Td 22, and then pass through matrix
Conversion obtains full S parameter S that test sample is correspondingd 11、Sd 21、Sd 12、Sd 22；Utilize test sample S obtained
Parameter just i.e. can get the complex dielectric permittivity of sample, complex permeability, sample loss by transmission bounce technique inverting
Cut or quality factor.
For to material working range at radio frequency to the test less than 18GHz frequency range, use sub-miniature A connector
Meet the requirement of test.To requiring test material Jie in higher frequency section (K frequency range, Ka frequency range, Q frequency range)
Electrical characteristics test with characterize then can by replacing corresponding working frequency range joint kind (two-way SSMA joint,
Two-way GPO, OSMP or SMP joint) come with corresponding adaptor and corresponding sample room coaxial inner conductor
Realize.As a example by two-way SSMA joint, when testing upper frequency limit and being 38GHz, replaceable two-way SSMA
Splicer and the adaptor of correspondence thereof and sample room coaxial inner conductor, carried out even by the connected mode in embodiment
Connect test, it is possible to achieve test system is available for testing the extension of frequency range.
The removal that the present invention the most inevitably tests coupling effect in design for joint is more square
Just, can realize for connecing while part of detecting the most removable in fixture being well coupled in fixture
The independent test of head S parameter, carries out test by the instrument after using existing calibrated part to calibrate and can ensure that
The accuracy of test result, the sealing in design ensure that for liquid with the requirement of fixture sample size simultaneously
The sign of body example dielectric characteristic.
Claims (6)
1. the Guan Bi coaxial transmission line test system characterizing liquid and solid material dielectric property, it is characterised in that
This Guan Bi coaxial transmission line test system includes test fixture, vector network analyzer (9), computer (10)
With test connecting line (11)；Described test fixture includes two-way sub-miniature A connector, screw (4), water proof rubber
Packing ring (5), the adaptor (6) of both ends open connectivity structure, have electromagnetic shielding effect sample room (7),
Sample room inner wire (8) and testing sample；
Described two-way sub-miniature A connector side is by the double female coaxial inner conductor (3) of two-way sub-miniature A connector and sample
Indoor conductor (8) grafting is connected, and by four hole flanges (1), two-way sub-miniature A connector is fixed on adaptor (6)
One end, opposite side is connected with vector network analyzer (9) by test connecting line (11)；Described switching
The other end of head (6) is engaged with sample room (7) by inner hole thread, the end of adaptor (6) inner hole thread
It is annular groove at tail, annular waterproof rubber gasket (5) is installed；Described vector network analyzer (9) leads to
Cross test connecting line (11) to be connected with test fixture, testing sample is tested；Computer (10) with
Vector network analyzer (9) connects, and carries out data acquisition and computational analysis；Described sample room inner wire (8),
The double female coaxial inner conductor (3) of two-way sub-miniature A connector and sample room (7) are in same axis, treat test sample
Product are placed on the inner annular intracavity of sample room (7) between two adaptors (6)；
Described two-way sub-miniature A connector is by four hole flanges (1), column tubular politef (2) and two-way SMA
The double female coaxial inner conductor (3) of joint is constituted, and two-way sub-miniature A connector is female, and female two ends are external screw thread,
It is coaxially interior that column tubular politef (2) is filled in four hole flanges (1) female double with two-way sub-miniature A connector
Between conductor (3)；The interior diameter of described column tubular politef (2) is equal to two-way sub-miniature A connector
The diameter of double female coaxial inner conductors (3), overall diameter is equal to the interior diameter of two-way sub-miniature A connector outer conductor, long
Degree is equal to the length of the double female coaxial inner conductor (3) of two-way sub-miniature A connector；Described two-way sub-miniature A connector is double female
The two ends female size of head coaxial inner conductor (3) is identical with sub-miniature A connector female inner wire, all contains symmetry and opens
The cylindrical hole that seam caves in, hole terminal is coaxial bellmouth, by coaxial bellmouth and sample room inner wire (8)
Connect；
Described sample room inner wire (8) two ends are contact pin, and its size female double with two-way sub-miniature A connector is coaxial
The female matching size at inner wire (3) two ends closes, and sample room inner wire (8) removes the principal length of contact pin
Equal with sample room (7), main body portion diameter female coaxial inner conductor (3) double with two-way sub-miniature A connector is straight
Footpath is equal.
Guan Bi coaxial transmission line the most according to claim 1 test system, it is characterised in that described is two-way
Sub-miniature A connector, sample room (7), adaptor (6), the double female coaxial inner conductor (3) of two-way sub-miniature A connector and
Sample room inner wire (8) is austenite 304 rustless steel.
Guan Bi coaxial transmission line the most according to claim 1 and 2 test system, it is characterised in that two-way SMA
Joint and the inner surface of sample room (7), sub-miniature A connector inner wire (3) and the table of sample room inner wire (8)
Face is processed by shot blasting.
Guan Bi coaxial transmission line the most according to claim 1 and 2 test system, it is characterised in that described
Testing sample is liquid or solid material.
Guan Bi coaxial transmission line the most according to claim 3 test system, it is characterised in that described is to be measured
Sample is liquid or solid material.
6. use the arbitrary described Guan Bi coaxial transmission line test characterized systematically testing sample dielectric of claim 1-5 special
The method of property, it is characterised in that specifically include following steps:
The first step, setup test instrument, gather data
Computer (10) is connected with vector network analyzer (9), obtains test instrunment data；Will test
Connecting line (11) connects with vector network analyzer (9) corresponding ports, with standard calibration part to vector network
Analyser (9) carries out full dual-port correction, preserves correction data to vector network analyzer (9) after correction
In；
Second step, tests the S parameter of two-way sub-miniature A connector
Two-way sub-miniature A connector is connected with the test connecting line (11) of vector network analyzer (9) dual-port,
Two-way sub-miniature A connector is carried out sweep check and obtains full S parameter S of two-way sub-miniature A connectora 11、Sa 21、Sa 12、Sa 22,
And the data that vector network analyzer (9) records are saved in computer (10)；
3rd step, puts into sample room (7) by testing sample；
4th step, tests testing sample
By test connecting line (11), test fixture is connected with vector network analyzer (9) two-port, right
Testing sample carries out sweep check, and the dual-port population parameter S of test fixture that will recordm 11、Sm 21、Sm 12、
Sm 22Import computer (10) to preserve；
5th step, removes test ghost effect, calculates dielectric property parameter
Full S parameter S that second step is recordeda 11、Sa 21、Sa 12、Sa 22It is transmitted scattering parameter conversion and obtains phase
T parameter T answereda 11、Ta 12、Ta 21、Ta 22；Full S parameter S that 4th pacing is obtainedm 11、Sm 21、Sm 12、Sm 22
It is transmitted scattering parameter conversion and obtains corresponding T parameter Tm 11、Tm 21、Tm 12、Tm 22；
Calculated by chain type transmission matrix and remove the test ghost effect that two-way sub-miniature A connector brings, obtain to be measured
T parameter T of sampled 11、Td 21、Td 12、Td 22, then obtain, by matrixing, the full S parameter that testing sample is corresponding
Sd 11、Sd 21、Sd 12、Sd 22, full S parameter Sd 11、Sd 21、Sd 12、Sd 22Obtain to be measured by transmission bounce technique inverting
The dielectric property of sample, described dielectric property includes complex dielectric permittivity, complex permeability, sample loss tangent
Or quality factor.
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| CN201610272097.0A CN105929246B (en) | 2016-04-27 | 2016-04-27 | A kind of closure coaxial transmission line test system and method for characterizing sample to be tested dielectric property |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107340306A (en) * | 2017-09-08 | 2017-11-10 | 大连理工大学 | A kind of method for detecting oily waste water petrochina hydrocarbon content |
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| CN107091847A (en) * | 2017-06-01 | 2017-08-25 | 厦门大学 | A kind of dielectric material measuring electromagnetic parameters device and measuring method |
| CN107091847B (en) * | 2017-06-01 | 2023-11-07 | 厦门大学 | Device and method for measuring electromagnetic parameters of dielectric material |
| CN107340306A (en) * | 2017-09-08 | 2017-11-10 | 大连理工大学 | A kind of method for detecting oily waste water petrochina hydrocarbon content |
| CN107340306B (en) * | 2017-09-08 | 2019-08-09 | 大连理工大学 | A kind of method of petroleum hydrocarbon content in detection oily waste water |
| CN108318746A (en) * | 2018-04-10 | 2018-07-24 | 四川聚强创新科技有限公司 | A kind of VHF frequency ranges complex dielectric constant measuring apparatus |
| CN109444174B (en) * | 2018-08-20 | 2021-08-31 | 中国石油天然气集团有限公司 | High-frequency rock dielectric constant measuring method and measuring clamp |
| CN109444174A (en) * | 2018-08-20 | 2019-03-08 | 中国石油天然气集团有限公司 | Fixture is used in a kind of high frequency dielectric constant of rock measurement method and measurement |
| CN110398678A (en) * | 2019-06-11 | 2019-11-01 | 西安电子科技大学 | A kind of wide impedance ranges test method of large power semiconductor device |
| CN110596463A (en) * | 2019-09-20 | 2019-12-20 | 电子科技大学 | Coaxial measuring device, testing system and method for measuring dielectric constant of medium |
| CN111856151A (en) * | 2020-08-19 | 2020-10-30 | 无锡威孚高科技集团股份有限公司 | Material testing device and system for testing dielectric constant of wave-transparent material |
| WO2022227945A1 (en) * | 2021-04-25 | 2022-11-03 | 中兴通讯股份有限公司 | Cable parameter determination method, apparatus and system, storage medium, and electronic apparatus |
| US20230065531A1 (en) * | 2021-08-25 | 2023-03-02 | Lanzhou University | Single-ended test method for wave-absorbing characteristic of material |
| CN113960510A (en) * | 2021-10-20 | 2022-01-21 | 北京环境特性研究所 | Coaxial annular material electromagnetic parameter testing seat and testing system testing method |
| CN113960510B (en) * | 2021-10-20 | 2024-01-19 | 北京环境特性研究所 | Coaxial annular material electromagnetic parameter test seat and test system test method |
| CN113985140A (en) * | 2021-10-28 | 2022-01-28 | 南昌工程学院 | Dielectric characteristic testing device based on equiangular spiral line coupler |
| CN114545092A (en) * | 2022-03-15 | 2022-05-27 | 昆明理工大学 | Sample loading device for testing dielectric property of hydride material with high moisture absorption and high activity |
| CN115494308A (en) * | 2022-09-20 | 2022-12-20 | 闽都创新实验室 | Material electromagnetic parameter measuring device and measuring method |
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