CN113960510B - Coaxial annular material electromagnetic parameter test seat and test system test method - Google Patents
Coaxial annular material electromagnetic parameter test seat and test system test method Download PDFInfo
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- CN113960510B CN113960510B CN202111218507.0A CN202111218507A CN113960510B CN 113960510 B CN113960510 B CN 113960510B CN 202111218507 A CN202111218507 A CN 202111218507A CN 113960510 B CN113960510 B CN 113960510B
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- 238000012360 testing method Methods 0.000 title claims abstract description 166
- 239000000463 material Substances 0.000 title claims abstract description 43
- 238000010998 test method Methods 0.000 title abstract description 6
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 11
- 238000009434 installation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1253—Measuring galvano-magnetic properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
-
- 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
- G01R27/28—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response
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- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention relates to the technical field of electromagnetic parameter measurement of materials, in particular to a coaxial annular material electromagnetic parameter test seat, a coaxial annular material electromagnetic parameter test system and a coaxial annular material electromagnetic parameter test method. The clamping part of the to-be-tested piece and the two cable brackets of the test seat are arranged on the base, the two cable brackets are respectively arranged on two sides of the clamping part of the to-be-tested piece, one end of the test cable passes through the through hole on the cable bracket and is in threaded connection with the coaxial clamp, the test cable is tightly matched with the through hole, the test cable can be well fixed, the cable is prevented from shaking randomly in the process of calibration and test connection, the coaxial clamp which is leveled with the to-be-tested piece is prevented from unnecessarily moving, the phase stability in the test process is ensured, and the test error is reduced. The two through holes are coaxially arranged with the coaxial clamp, the cable support is in sliding connection with the base, ports of the test cables connected with the two ends of the coaxial clamp are guaranteed to be on the same horizontal line, the test cables are convenient to be connected with the coaxial clamp, and accuracy of multiple connection is guaranteed.
Description
Technical Field
The invention relates to the technical field of electromagnetic parameter measurement of materials, in particular to a coaxial annular material electromagnetic parameter test seat, a coaxial annular material electromagnetic parameter test system and a coaxial annular material electromagnetic parameter test method.
Background
The material electromagnetic parameter test seat is a very critical component in the whole material parameter test system, is an important device used for calibrating the system and installing a tested sample and is connected with the vector network analyzer to form a closed loop test system, and the design advantages and disadvantages of the test seat directly influence the test precision of the vector network analyzer. The test seat has two main indexes:
(1) The repeated installation of the material sample is convenient, and the consistency of each installation is ensured;
(2) The test system is convenient to calibrate, and the test seat is ensured to be as stable as possible.
In the prior transmission line waveguide test method, a test seat used by the prior transmission line waveguide test method consists of coaxial waveguide conversion, a waveguide section and a material sample clamp. The test seat has the advantages of relatively simple structure and easy realization; the defects are that the test frequency band is narrow, the stability is poor, the waveguide movement is large in the calibration process, the cable jitter is large in the sample (to-be-tested piece) installation process, the measurement precision and the stability of a measurement system are affected, and the existing material electromagnetic parameter test seat is difficult to meet the test requirement along with the higher and higher requirements on the test precision.
Disclosure of Invention
First, the technical problem to be solved
The first object of the invention is to provide a coaxial annular material electromagnetic parameter test seat, which can provide better fixation for a test cable, improve the test stability of a test system, reduce test errors, test frequency bandwidth and improve test efficiency.
The second object of the invention is to provide a coaxial annular material electromagnetic parameter testing system with the testing seat.
A third object of the present invention is to provide a method for electromagnetic parameter testing of coaxial annular materials using the above-mentioned testing system.
(II) technical scheme
To achieve the above object, in a first aspect, the present invention provides a coaxial annular material electromagnetic parameter test socket, comprising:
a base;
the clamping part of the to-be-tested piece is arranged on the base and at least comprises a coaxial clamp, wherein the coaxial clamp is cylindrical made of metal materials, and external threads are arranged at two ends of the coaxial clamp and are used for being in threaded connection with the test cable; and
the two cable brackets are respectively arranged at two sides of the clamping part of the piece to be tested, the cable brackets are provided with through holes for the test cables to pass through, the test cables are tightly matched with the through holes, the two through holes are coaxially arranged with the coaxial clamp, and the cable brackets are slidably fixed on the base and can axially move along the coaxial clamp.
Preferably, the clamping part of the workpiece to be tested further comprises a clamp bracket, the clamp bracket is fixed on the base, and a jaw for clamping the coaxial clamp is arranged on the clamp bracket.
Preferably, the clamp holder is L-shaped, and the jaws are provided at the ends of the clamp holder.
Preferably, the outer peripheral side of the coaxial clamp is provided with a limit groove matched with the jaw.
Preferably, the limiting groove is located at an intermediate position in the axial direction of the coaxial clamp.
Preferably, the cable support includes movable block and fixed block, and the up end of fixed block is equipped with down the semicircle groove, and the lower terminal surface of movable block is equipped with the semicircle groove, and when the lower terminal surface of movable block and the up end butt joint of fixed block, go up semicircle groove and lower semicircle groove formation via hole, pass through locking screw connection between movable block and the fixed block, can adjust the distance between movable block and the fixed block through adjusting locking screw.
Preferably, the base comprises two vertical plates arranged at intervals, a guide rail and a support rod are arranged on the upper sides of the two vertical plates, the guide rail and the support rod are arranged in parallel, and the guide rail and the support rod are respectively connected with the two vertical plates;
be equipped with on the cable support with guide rail matched with slider, the cable support passes through the slider to be installed at the guide rail, awaits measuring piece clamping part and installs at the bracing piece.
Preferably, a connecting rod for connecting the two vertical plates is arranged between the two vertical plates.
In a second aspect, the invention also provides a coaxial annular material electromagnetic parameter testing system, which comprises any coaxial annular material electromagnetic parameter testing seat in the first aspect;
one end of one test cable is connected with a transmitting port of the vector network analyzer, the other end of the test cable passes through a through hole on one cable support to be coaxially connected with one end of the coaxial clamp in a threaded manner, one end of the other test cable is connected with a receiving port of the vector network analyzer, and the other end of the test cable passes through a through hole on the other cable support to be coaxially connected with the other end of the coaxial clamp in a threaded manner, so that S parameters of a piece to be measured are measured; and
and the computer is in signal connection with the vector network analyzer and is used for setting the parameters of the test system, receiving the S parameters measured by the vector network analyzer and processing the S parameters to obtain the electromagnetic parameters of the to-be-tested piece.
In a third aspect, the present invention also provides a coaxial annular material electromagnetic parameter testing method, adopting any one of the coaxial annular material electromagnetic parameter testing systems in the second aspect, including the following steps:
s1, setting system parameters on a computer according to test requirements;
s2, calibrating two ends of the measuring system, firstly disconnecting the coaxial clamp and the test cable, and then sequentially connecting an open circuit calibration piece, a short circuit calibration piece and a matched load calibration piece on the coaxial clamp for calibration.
S3, coaxially and tightly fitting the annular to-be-tested piece into the coaxial clamp, connecting the test cable with two ends of the coaxial clamp in a threaded manner to form a test closed loop, and inputting the axial lengths of the to-be-tested piece and the coaxial clamp into a computer;
s4, carrying out sweep frequency measurement by a vector network analyzer to obtain S parameters of the piece to be measured;
s5, processing the obtained S parameter of the to-be-detected piece by a computer to obtain the electromagnetic parameter of the to-be-detected piece.
(III) beneficial effects
The technical scheme of the invention has the following advantages: the coaxial annular material electromagnetic parameter test seat provided by the invention comprises a base, a clamping part of a piece to be tested and two cable brackets, wherein the clamping part of the piece to be tested and the two cable brackets are arranged on the base, the two cable brackets are respectively arranged on two sides of the clamping part of the piece to be tested, through holes for a test cable to pass through are formed in the cable brackets, one end of the test cable can pass through the through holes and is in threaded connection with a coaxial clamp, the test cable is tightly matched with the through holes, the test cable can be well fixed, the cable is prevented from shaking randomly in the process of calibration and test connection, unnecessary movement of the coaxial clamp which is leveled with the piece to be tested is avoided, the phase stability in the test process is ensured, and the test error is reduced. The two through holes are coaxially arranged with the coaxial clamp, the cable support and the base are in sliding connection, the cable support can move along the axial direction of the coaxial clamp, the axial distance between the cable support and the coaxial clamp is adjusted, the ports of the test cables connected with the two ends of the coaxial clamp can be ensured to be on the same horizontal line, the test cables are convenient to be connected with the coaxial clamp, and the accuracy of multiple connection is ensured. Compared with the existing waveguide test seat, the test seat can be used for testing the whole frequency band at one time, and the test efficiency is improved.
The coaxial annular material electromagnetic parameter testing system provided by the invention can better fix the testing cable, test the frequency bandwidth and improve the testing accuracy and the testing efficiency.
The coaxial annular material electromagnetic parameter testing method provided by the invention can be used for better fixing the testing cable, has high testing accuracy and testing efficiency, and can simplify the steps after testing compared with the prior waveguide testing seat for testing the frequency band.
Drawings
The drawings of the present invention are provided for illustrative purposes only and the proportion and the number of the parts in the drawings do not necessarily coincide with the actual product.
FIG. 1 is a schematic structural diagram of a coaxial annular material electromagnetic parameter test seat according to an embodiment of the present invention;
FIG. 2 is a partially exploded view of the electromagnetic parameter test seat of FIG. 1 at another angle;
FIG. 3 is a schematic view of the electromagnetic parameter testing seat of FIG. 1 at another angle;
fig. 4 is an exploded view of a clamping portion of a workpiece according to an embodiment of the invention.
In the figure: 1: a base; 11: a vertical plate; 12: a guide rail; 13: a support rod; 14: a connecting rod;
2: clamping part of the piece to be tested; 21: a coaxial clamp; 211: a limit groove; 22: a clamp bracket; 221: a jaw;
3: a cable support; 31: a fixed block; 311: a lower semicircular groove; 32: a moving block; 321: an upper semicircular groove; 33: a locking screw; 34: a via hole; 35: a slide block;
4: the cable was tested.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the coaxial annular material electromagnetic parameter testing seat provided by the embodiment of the invention comprises a base 1, a clamping part 2 of a piece to be tested and two cable brackets 3, wherein the clamping part 2 of the piece to be tested and the two cable brackets 3 are arranged on the base 1, the two cable brackets 3 are respectively arranged on two sides of the clamping part 2 of the piece to be tested, a through hole 34 for a test cable to pass through is arranged on the cable brackets 3, one end of the test cable 4 can pass through the through hole 34 and be in threaded connection with the coaxial clamp 21, and the test cable 4 is tightly matched with the through hole 34. The two through holes 34 are coaxially arranged with the coaxial clamp 21, the coaxial clamp 21 is cylindrical made of metal materials, the cable support 3 is in sliding connection with the base 1, the cable support 3 can move along the axial direction of the coaxial clamp 21, and the axial distance between the cable support 3 and the coaxial clamp 21 is adjusted.
When the coaxial fixture is used, the annular to-be-tested piece is coaxially embedded in the cavity of the coaxial fixture 21, the outer peripheral side of the annular to-be-tested piece is tightly attached to the wall of the cavity of the coaxial fixture, the test cable 4 passes through the through hole 34, and the end part of the annular to-be-tested piece is in threaded connection with the coaxial fixture 21. The material electromagnetic parameter test seat can better fix the test cable 4 and the to-be-tested piece, prevent the cable from shaking randomly in the process of calibration and test connection, ensure the phase stability in the test process, reduce the test error and avoid the unnecessary movement of the coaxial clamp of the to-be-tested piece, which is flat. Meanwhile, the ports of the test cables 4 connected with the two ends of the coaxial clamp 21 are on the same horizontal line, so that the test cables 4 are conveniently connected with the coaxial clamp 21, and the accuracy of multiple connection is ensured.
In addition, compared with the existing waveguide test seat, the test seat in the embodiment can be used for testing, a test system can have a wider test frequency band, and the test system can be used for testing waveguides with different sizes by using a waveguide method to test the waveguides in five frequency bands for replacing the waveguides with different sizes, and the test seat in the embodiment can be used for completing the test of the whole frequency band at one time, so that the test efficiency is improved.
In order to facilitate the fixation of the coaxial clamp 21, in the preferred embodiment, referring to fig. 2 and 4, the clamping portion 2 of the workpiece further includes a clamp holder 22, the clamp holder 22 is fixed to the base 1, and a jaw 221 for clamping the coaxial clamp 21 is provided on the clamp holder 22.
Referring to fig. 4, in a preferred embodiment, the clamp holder 22 has an L-shape, and the jaws 221 are provided at the ends of the clamp holder 22, so that the influence on other components can be minimized while the coaxial clamp 21 can be fixed at the corresponding position.
In order to make the mounting of the coaxial clamp 21 more convenient, the fixing more firm and the fixing position more accurate, it is further preferable that the outer peripheral side of the coaxial clamp 21 is provided with a limit groove 211 that matches the jaw 221. For example, the jaw 221 is a rectangular jaw, and is grooved on three sides of the outer periphery of the coaxial clamp 21, the grooved on the three sides are communicated to form a U-shaped limit groove, and the U-shaped limit groove is tightly attached to the inner wall of the rectangular jaw, so that the jaw 221 is matched with the limit groove 211, the installation and fixation of the coaxial clamp 21 are realized rapidly, repeated disassembly and assembly are repeated for many times, and the position of the coaxial clamp is not deviated. Preferably, the limiting groove 211 is located at an intermediate position in the axial direction of the coaxial jig 21.
For the passage and installation of the test cable 4, in some preferred embodiments, referring to fig. 2 and 3, the cable support 3 includes a moving block 32 and a fixed block 31, the upper end surface of the fixed block 31 is provided with a lower semicircular groove 311, the lower end surface of the moving block 32 is provided with an upper semicircular groove 321, when the lower end surface of the moving block 32 is in butt joint with the upper end surface of the fixed block 31, the upper semicircular groove 321 and the lower semicircular groove 311 form a through hole 34, the moving block 32 is connected with the fixed block 31 through a locking screw 33, the distance between the moving block 32 and the fixed block 31 can be adjusted through adjusting the locking screw 33, when the test cable 4 needs to pass through the through hole 34, the locking screw 33 can be unscrewed, the distance between the moving block 32 and the fixed block 31 is increased, the test cable easily passes through the through hole 34, and then the locking screw 33 is screwed to fix the test cable 4, so that the test cable 4 is tightly matched with the through hole 34.
Referring to fig. 1 and 2, the base 1 includes two vertical plates 11 disposed at intervals, a guide rail 12 and a support bar 13 are disposed on upper sides of the two vertical plates 11, the guide rail 12 and the support bar 13 are disposed in parallel, and the guide rail 12 and the support bar 13 are connected to the two vertical plates 11, respectively. The cable support 3 is provided with a sliding block 35 matched with the guide rail 12, the cable support 3 is arranged on the guide rail 12 through the sliding block 35, and the clamping part 2 of the piece to be tested is arranged on the supporting rod 13.
In order to further improve the stability of the base 1, a connecting rod 14 connecting the two risers 11 is provided between the two risers 11, as shown in fig. 1 and 2.
The embodiment also provides a coaxial annular material electromagnetic parameter testing system, which can adopt any coaxial annular material electromagnetic parameter testing seat as a testing seat and further comprises a vector network analyzer and a computer. The vector network analyzer is provided with a transmitting port and a receiving port, and is connected with the coaxial clamp through two test cables. One end of one test cable is connected with the transmitting port of the vector network analyzer, the other end of the test cable penetrates through a through hole on one cable support to be coaxially and threadedly connected with one end of the coaxial clamp, and one end of the other test cable is connected with the vectorThe receiving port of the network analyzer is connected with the other end of the coaxial clamp through a via hole on another cable bracket to form a tested closed loop, and the S parameter is used for measuring and obtaining the S parameter of the piece to be tested, wherein the S parameter comprises a transmission parameter S 21 And reflection parameter S 11 . The computer is in signal connection with the vector network analyzer and is used for setting parameters of a test system, receiving S parameters measured by the vector network analyzer and processing the S parameters to obtain electromagnetic parameters of the to-be-tested piece. The test system is simple in structure, good fixation is provided for the test cable, test stability is improved, and test errors are reduced.
It should be noted that, the test cable, the vector network analyzer and the computer are all in the prior art, and are not described herein.
The embodiment also provides a coaxial annular material electromagnetic parameter testing method, which can be used for testing by adopting any coaxial annular material electromagnetic parameter testing system and comprises the following steps:
the first step: the system parameters are set on the computer according to the test requirements, and the system parameters to be set are known in the art and will not be described herein.
And a second step of: the measurement system is calibrated at two ends, the coaxial clamp is disconnected with the test cable first, and then an open-circuit calibration piece, a short-circuit calibration piece and a matched load calibration piece are sequentially connected to the coaxial clamp for calibration, and the calibration process and the required calibration piece are prior art in the field and are not repeated here.
And a third step of: the annular to-be-tested piece is coaxially and tightly assembled into the coaxial clamp, the two ends of the test cable, which are connected with the coaxial clamp, are in threaded connection to form a closed loop for testing, and the axial lengths of the to-be-tested piece and the coaxial clamp are input into a computer. When the to-be-tested piece needs to be replaced or the test quantity needs to be retested for many times, the uniformity of the test position can be guaranteed, the test cable is prevented from shaking and moving during the test, the test error is reduced, and the test efficiency and the test precision are improved.
Fourth step: and the vector network analyzer performs sweep frequency measurement to obtain the S parameter of the piece to be measured.
Fifth step: and (5) processing by a computer to obtain the electromagnetic parameters of the to-be-detected part.
It should be noted that, the working process of the vector network analyzer and the processing of the S parameter by the computer are all in the prior art, and are not described herein.
The invention is not described in detail in a manner known to those skilled in the art.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: not every embodiment contains only one independent technical scheme, and all technical features mentioned in every embodiment can be combined in any way to form other implementations which can be understood by those skilled in the art in case of no scheme conflict.
In addition, modifications may be made to the embodiments described in the foregoing, or equivalents may be substituted for elements thereof without departing from the scope of the invention, so that the essence of the corresponding embodiments does not depart from the spirit and scope of the embodiments of the invention.
Claims (8)
1. A coaxial loop material electromagnetic parameter test socket, comprising:
a base;
the clamping part of the to-be-tested piece is arranged on the base and at least comprises a coaxial clamp, wherein the coaxial clamp is cylindrical made of metal materials, and external threads are arranged at two ends of the coaxial clamp and are used for being in threaded connection with a test cable; and
the two cable brackets are respectively arranged at two sides of the clamping part of the piece to be tested, through holes for the test cables to pass through are formed in the cable brackets, the test cables are tightly matched with the through holes, the two through holes are coaxially arranged with the coaxial clamp, and the cable brackets are slidably fixed on the base and can move along the axial direction of the coaxial clamp;
the base comprises two vertical plates arranged at intervals, a guide rail and a support rod are arranged on the upper sides of the two vertical plates, the guide rail and the support rod are arranged in parallel, and the guide rail and the support rod are respectively connected with the two vertical plates;
the cable support is provided with a sliding block matched with the guide rail, the cable support is installed on the guide rail through the sliding block, and the clamping part of the piece to be tested is installed on the supporting rod;
the cable support comprises a moving block and a fixed block, wherein a lower semicircular groove is formed in the upper end face of the fixed block, an upper semicircular groove is formed in the lower end face of the moving block, the upper semicircular groove and the lower semicircular groove form the through hole when the lower end face of the moving block is in butt joint with the upper end face of the fixed block, the moving block is connected with the fixed block through a locking screw, and the distance between the moving block and the fixed block can be adjusted through adjusting the locking screw.
2. The material electromagnetic parameter test socket of claim 1, wherein: the clamping part of the piece to be tested further comprises a clamp bracket, wherein the clamp bracket is fixed on the base, and a jaw for clamping the coaxial clamp is arranged on the clamp bracket.
3. The material electromagnetic parameter test socket of claim 2, wherein: the clamp bracket is L-shaped, and the jaw is arranged at the end part of the clamp bracket.
4. A material electromagnetic parameter test socket according to claim 2 or 3, wherein: and a limiting groove matched with the jaw is formed in the outer peripheral side of the coaxial clamp.
5. The material electromagnetic parameter test seat of claim 4, wherein: the limiting groove is positioned at the middle position in the axial direction of the coaxial clamp.
6. The material electromagnetic parameter test socket of claim 1, wherein: a connecting rod for connecting the two vertical plates is arranged between the two vertical plates.
7. The coaxial annular material electromagnetic parameter testing system is characterized in that: a coaxial annular material electromagnetic parameter test socket comprising any one of claims 1-6;
one end of one test cable is connected with a transmitting port of the vector network analyzer, the other end of the test cable passes through a through hole on one cable support to be coaxially connected with one end of the coaxial clamp in a threaded manner, one end of the other test cable is connected with a receiving port of the vector network analyzer, and the other end of the test cable passes through a through hole on the other cable support to be coaxially connected with the other end of the coaxial clamp in a threaded manner, so that S parameters of a piece to be measured are measured; and
and the computer is in signal connection with the vector network analyzer and is used for setting parameters of a test system, receiving the S parameters measured by the vector network analyzer and processing the S parameters to obtain electromagnetic parameters of the to-be-measured piece.
8. A coaxial annular material electromagnetic parameter testing method is characterized in that: testing with the material electromagnetic parameter testing system of claim 7, comprising the steps of:
s1, setting system parameters on a computer according to test requirements;
s2, calibrating two ends of a measurement system, namely firstly disconnecting the coaxial clamp from the test cable, and then sequentially connecting an open circuit calibration piece, a short circuit calibration piece and a matched load calibration piece on the coaxial clamp for calibration;
s3, coaxially and tightly fitting an annular to-be-tested piece into the coaxial clamp, connecting a test cable with two ends of the coaxial clamp in a threaded manner to form a closed loop for testing, and inputting the axial lengths of the to-be-tested piece and the coaxial clamp on the computer;
s4, carrying out sweep frequency measurement by the vector network analyzer to obtain S parameters of the to-be-measured piece;
s5, processing the obtained S parameter of the to-be-detected piece by the computer to obtain the electromagnetic parameter of the to-be-detected piece.
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| CN202111218507.0A CN113960510B (en) | 2021-10-20 | 2021-10-20 | Coaxial annular material electromagnetic parameter test seat and test system test method |
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| CN202111218507.0A CN113960510B (en) | 2021-10-20 | 2021-10-20 | Coaxial annular material electromagnetic parameter test seat and test system test method |
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