CN112824912A - Transmission line test module and transmission line test method - Google Patents
Transmission line test module and transmission line test method Download PDFInfo
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- CN112824912A CN112824912A CN201911139988.9A CN201911139988A CN112824912A CN 112824912 A CN112824912 A CN 112824912A CN 201911139988 A CN201911139988 A CN 201911139988A CN 112824912 A CN112824912 A CN 112824912A
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- transmission line
- test
- testing
- module
- insulating base
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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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
- G01R1/0416—Connectors, terminals
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- General Physics & Mathematics (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
The invention discloses a transmission line test module and a transmission line test method. The adapter circuit board is provided with a signal circuit and a grounding metal layer. The test component is arranged on the adapter circuit board and corresponds to the grounding metal layer. The test assembly includes an insulating base, a plurality of probes, and a conductive block. The probes penetrate through the insulating base, and two end parts of each probe protrude out of the first side surface and the second side surface of the insulating base. The conductive block is provided with a first surface and a second surface which are oppositely arranged. The conductive block wraps the insulating base, the probes protruding out of the first side face of the insulating base are exposed out of the first surface, the probes protruding out of the second side face of the insulating base are exposed out of the second surface, and a groove is formed in the second surface in a concave mode. When the test assembly is arranged on the transfer circuit board, the second surface is contacted with the grounding metal layer, and the groove corresponds to the signal circuit.
Description
Technical Field
The present invention relates to a transmission line test module, and more particularly, to a transmission line test module for effectively achieving impedance matching.
Background
When testing a transmission line connecting a Board-to-Board connector (Board-to-Board connector) to a Flexible Printed Circuit (FPC) according to the prior art, the reflection between the testing apparatus and an object to be tested is too large to accurately measure parameters of the transmission line because the testing pin die cannot effectively perform impedance matching.
If the male and female heads of the board-to-board connector are buckled with each other for testing, the method is not suitable for testing in the mass production process and is easy to damage the connector in the testing process.
Disclosure of Invention
In view of the above, the present application provides a transmission line testing module, which includes an adapter circuit board and a testing assembly. The adapter circuit board is provided with a signal circuit and a grounding metal layer, and the grounding metal layer surrounds part of the signal circuit. The test component is arranged on the adapter circuit board and corresponds to the grounding metal layer. The test assembly includes an insulating base, a plurality of probes, and a conductive block. The insulating base is provided with a first side surface and a second side surface which are oppositely arranged. The probes penetrate through the insulating base, so that two end parts of each probe protrude out of the first side surface and the second side surface of the insulating base.
The conductive block is provided with a first surface and a second surface which are oppositely arranged. The conductive block wraps the insulating base, the probes protruding out of the first side face of the insulating base are exposed out of the first surface, the probes protruding out of the second side face are exposed out of the second surface, and a groove is formed in the second surface in a concave mode. When the test assembly is arranged on the transfer circuit board, the second surface is contacted with the grounding metal layer, and the groove corresponds to the signal circuit.
Therefore, the insulating base provided with the probes is coated and assembled by the conductive block, and the conductive block is in contact with the grounding metal layer of the switching circuit board, so that the whole testing assembly and the switching circuit board are grounded together, the grounding area is increased, and the testing noise is reduced. In addition, the groove arranged at the bottom of the conductive block can effectively avoid and transmit a signal circuit of a result detected by the probe, so that the test result is prevented from being influenced, and the impedance consistency of the switching circuit board can be kept.
In some embodiments, the insulating base and the adapting circuit board have a distance therebetween.
In some embodiments, the first surface has a receiving groove corresponding to the first side surface of the insulating base and disposed at the position where the first side surface is exposed, and a distance from a bottom surface of the receiving groove to the first surface is smaller than a distance from the first side surface to the first surface.
In some embodiments, the shape of the receiving slot is the same as the shape of the connector to be tested of the transmission line.
In some embodiments, the transmission line testing module further comprises a lower module and a carrier tray. The switching circuit board is assembled on the lower module. The bearing disc is assembled on the lower module, covers the switching circuit board and enables the upper surface of the test assembly to be exposed out of the bearing disc.
In some embodiments, the carrier tray has a test recess where the test assembly is located.
In some embodiments, the carrier tray further has two relief slots disposed in the testing recess and adjacent to the testing component.
In another embodiment of the present invention, the transmission line testing module can be used for testing a transmission line, and the transmission line testing method includes obtaining the transmission line testing module; arranging a transmission line testing module on the lower module; the bearing disc is assembled on the lower module, covers the switching circuit board and enables the upper surface of the test assembly to be exposed out of the bearing disc; placing a connector to be tested of the transmission line on the first surface of the conductive block corresponding to the probe; and pressing the upper module on the bearing disc, and starting the test.
In some embodiments, the transmission line has an identification code, the upper module has a perspective portion corresponding to the identification code, and the testing method further includes obtaining the identification code through the perspective portion by using a reader.
In summary, compared with the conventional test module made of only a general insulating material, the transmission line test module and the transmission line test method can effectively improve the overall impedance matching of the transmission line test module. Moreover, by utilizing the grooves arranged at the bottoms of the conductive blocks, a signal circuit for transmitting the result detected by the probe can be effectively avoided, so that the test result is prevented from being influenced, and the impedance consistency of the switching circuit board can be kept. During testing, the bar code reading device is used for identification, and the tested transmission line and the test result thereof can be rapidly recorded.
The detailed features and advantages of the present invention are described in detail in the following embodiments, which are sufficient for anyone skilled in the art to understand the technical contents of the present invention and to implement the present invention, and the related objects and advantages of the present invention can be easily understood by anyone skilled in the art according to the disclosure of the present specification, the claims and the attached drawings.
Drawings
Fig. 1 is a perspective view of a transmission line testing module according to an embodiment of the invention;
FIG. 2 is a partially exploded view of a transmission line testing module according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a transmission line testing module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a transmission line to be tested being placed in a transmission line testing module according to an embodiment of the invention;
fig. 5 is a schematic view of a transmission line testing module disposed on a carrier tray according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a transmission line testing module according to an embodiment of the invention;
FIG. 7 is a flow chart of a transmission line testing method according to an embodiment of the invention;
FIG. 8 is a comparison graph of the standing wave ratio (VSWR) of the transmission line test module according to the embodiment of the invention and the conventional pin die during testing; and
fig. 9 is a comparison graph of S21 curves of the transmission line test module according to the embodiment of the invention and the conventional pin die during testing.
Wherein, the reference numbers:
100 transmission line test module 10 switching circuit board
11 signal circuit 12 ground metal layer
13 test circuit 20 test assembly
21 first side of the insulating base 211
212 second side 22 Probe
23 first surface of conductive block 231
2311A second surface of the accommodation groove 232
2321 groove 30 transmission line
31 lower module of connector to be tested 40
50 Carrier tray 51 test recess
Module on 52-way groove 60
61 see-through 70 reader
D1 distance D2 and D3 distance
G1 control group G2 experimental group
S01-S06
Detailed Description
Referring to fig. 1 to 4, fig. 1 is a perspective view of a transmission line testing module according to an embodiment of the present invention, fig. 2 is a partially exploded view of the transmission line testing module according to the embodiment of the present invention, fig. 3 is a cross-sectional view of the transmission line testing module according to the embodiment of the present invention, and fig. 4 is a schematic view of a transmission line to be tested according to the embodiment of the present invention being placed in the transmission line testing module. As shown in fig. 1, the transmission line testing module 100 of the present embodiment includes a transition circuit board 10 and a testing assembly 20.
As seen in fig. 2, the relay circuit board 10 has a signal circuit 11 and a ground metal layer 12, and the ground metal layer 12 surrounds a portion of the signal circuit 11. The ground metal layer 12 may be formed by exposing a metal layer of the adapting circuit board 10, or the ground metal layer 12 may be plated on the adapting circuit board 10 and then grounded with the whole adapting circuit board 10. At the center of the ground metal layer 12 is a test circuit 13 that contacts a plurality of probes 22 (described in detail below). The test circuit 13 is electrically connected to the signal circuit 11, so that the signal read by the probe 22 is transmitted out through the signal circuit 11 via the test circuit 13 and the signal circuit 11 of the relay circuit board 10 for subsequent detection and analysis.
The test assembly 20 includes an insulating base 21, a plurality of probes 22, and conductive bumps 23. As shown in fig. 3, the insulating base 21 has a first side 211 and a second side 212 opposite to each other. The plurality of probes 22 are inserted into the insulating base 21, and both ends of each probe 22 protrude from the first side surface 211 and the second side surface 212 of the insulating base 21.
Referring to fig. 1 to fig. 3, the conductive block 23 has a first surface 231 and a second surface 232 disposed opposite to each other. The conductive block 23 covers the insulating base 21 and exposes the probe 22 protruding from the first side surface 211 of the insulating base 21 to the first surface 231. For example, a through hole may be formed on the conductive block 23, and then the insulating base 21 is disposed in the through hole, such that the first side surface 211 of the insulating base 21 is not completely covered by the conductive block 23 and is exposed. At this time, the probe 22 protruding from the first side surface 211 is exposed, so that the object to be tested can contact with the probe 22 during the subsequent testing. Similarly, the probe 22 protruding from the second side 212 of the insulating base 21 is exposed to the second surface 232 of the conductive block 23.
Next, as can be seen from fig. 2, a plurality of grooves 2321 are recessed in the second surface 232 of the conductive block 23. When the testing component 20 is assembled on the adapting circuit board 10, the second surface 232 of the conductive block 23 contacts the ground metal layer 12, and the groove 2321 corresponds to the signal circuit 11. That is, the conductive bumps 23 contact the grounding metal layer 12 on the adapting circuit board 10, so that the whole testing assembly 20 and the adapting circuit board 10 are grounded to increase the grounding area and reduce the noise during testing. In addition, the groove 2321 disposed at the bottom of the conductive block 23 can effectively avoid the signal circuit 11 that transmits the result detected by the probe 22, so as to avoid affecting the test result, and also maintain the impedance consistency of the adapting circuit board 10.
Referring to fig. 3, a distance D1 is provided between the insulating base 21 and the adapting circuit board 10. Thus, the insulating base 21 does not contact the test circuit 13 and the signal circuit 11 on the relay circuit board 10, and the impedance between the relay circuit board 10 and the test component 20 is not affected.
Referring to fig. 1 and fig. 3, the first surface 231 of the conductive block 23 has a receiving groove 2311 correspondingly surrounding the first surface 231 exposed from the first side surface 211 of the insulating base 21. The shape of the receiving groove 2311 is the same as the shape of the to-be-tested connector 31 of the transmission line 30 as the object to be tested. Thus, when the end of the transmission line 30 to be tested 31 is to be placed on the testing component 20 for testing, the shape of the receiving groove 2311 can be used for alignment, so that the connector 31 to be tested can be accurately placed at the testing position.
In addition, as shown in fig. 3, a distance D2 from the bottom surface of the receiving groove 2311 to the first surface 231 is smaller than a distance D3 from the first side surface 211 of the insulating base 21 to the first surface 231. Thus, when the connector 31 to be tested is placed in the receiving groove 2311, the terminal to be tested on the connector 31 to be tested will contact the probe 22 protruding from the first side surface 211 of the insulation base 21, but will not contact the first side surface 211 of the insulation base 21. Thus, it is possible to prevent impedance from varying due to a change in DK value (Dielectric Constant).
Next, a transmission line testing method for performing the transmission line 30 test using the above transmission line testing module 100 will be described. Referring to fig. 4 to 7, fig. 4 is a schematic diagram of a transmission line to be tested being placed in a transmission line testing module according to an embodiment of the present invention, fig. 5 is a schematic diagram of a transmission line testing module according to an embodiment of the present invention being placed on a carrying tray, fig. 6 is a schematic diagram of a transmission line testing module according to an embodiment of the present invention being tested, and fig. 7 is a flowchart of a transmission line testing method according to an embodiment of the present invention.
In practice, the required transmission line test modules 100 can be integrated or arranged according to the number of the connectors 31 to be tested arranged on the transmission line 30 of the object to be tested. As shown in fig. 4, in the present embodiment, since two ends of the transmission line 30 are respectively provided with one connector 31 to be tested, the transmission line 30 is also tested by arranging two sets of testing components 20 corresponding to the two adapting circuit boards 10. And the two sets of test assemblies 20 are commonly mounted on the lower module 40 to make the two sets of test assemblies 20 share the same ground and enlarge the common ground area. Referring to fig. 7, the transmission line testing method includes obtaining the transmission line testing module 100 (step S01), and disposing the transmission line testing module 100 on the lower module 40 (step S02). Fig. 4 shows only a part of the lower module 40, and the complete lower module 40 can be provided with corresponding holes or spaces reserved for connecting external connectors according to the number of adapters disposed on the adapting circuit board 10, so that the adapting circuit board 10 assembled on the lower module 40 can be connected with external connectors to transmit test signals to a computer or a machine for analysis and judgment.
Subsequently, as shown in fig. 5, the carrier tray 50 is assembled to the lower module 40, covering the adapting circuit board 10 and exposing the upper surface of the test assembly 20 to the carrier tray 50 (step S03). Next, the connector to be tested 31 of the transmission line 30 is placed at the first surface 231 of the conductive block 23 corresponding to the probe 22 (step S04). As can be seen in fig. 5, there is a test recess 51 on the carrier tray 50, and the test assembly 20 will be located at the test recess 51. In addition, the tray 50 further has two relief grooves 52 disposed in the testing recess 51 and adjacent to the testing component 20. Therefore, when the transmission line 30 is to be placed or picked up by hand, the relief groove 52 can be used to provide a working space for fingers to operate.
Next, as shown in fig. 6, the upper module 60 is pressed on the carrier tray 50, and the test is started (step S05). Therefore, the transmission line testing method is very simple, and the testing speed and efficiency in the mass production process can be improved. Moreover, with the structure of the transmission line testing module 100, effective impedance matching can be achieved, and the accuracy of the measurement result can be improved.
In addition, the transmission line 30 of the present embodiment has an identification code (not shown), and as can be seen from fig. 6, the upper module 60 has a see-through portion 61 corresponding to the identification code. The transmission line testing method further includes acquiring the identification code through the perspective part 61 by the reader 70 (step S06). After the test is started, the reader 70 reads the identification code on the transmission line 30 first, and can record the number of the transmission line 30 measured at present, so as to further understand the status of each product or eliminate defective products when the test result is analyzed and identified.
Referring to fig. 8 and 9, fig. 8 is a graph comparing a standing wave ratio (VSWR) of the transmission line test module according to the embodiment of the invention and a conventional pin die during testing, and fig. 9 is a graph comparing an S21 curve of the transmission line test module according to the embodiment of the invention and a conventional pin die during testing. For comparison, a conventional test module (conventional pin module) without the conductive block 23 is assembled on the adapting circuit board 10 as a comparison group G1, and the transmission line test module 100 with the test module 20 of the present embodiment is used as an experiment group G2.
As can be seen from fig. 8, the VSWR of the experimental group G2 was significantly reduced because the impedance matching between the relay circuit board 10 and the test component 20 was improved by the conductive bumps 23. Particularly, the VSWR of the whole is 1.4 or less in the high frequency part. However, the control group G1 does not match the impedance, so the VSWR value becomes higher in the higher frequency portion.
In addition, as the common ground area is enlarged, it can be seen from fig. 9 that the measured data is larger in the curve jitter of the control group G1 by using the S21 loss measurement function of the vector network analyzer, and the jitter amplitude is more obvious especially at higher frequencies. Whereas the curve jitter of experimental group G2 is smaller, this advantage is more pronounced especially at high frequencies.
As can be seen from the above experimental results, the impedance matching performance of the transmission line testing module 100 can be effectively improved by the transmission line testing module 100 and the transmission line testing method of the present embodiment. By using the conductive block 23 to cover the insulating base 21 assembled with the probes 22 and making the conductive block 23 contact with the grounding metal layer 12 of the adapting circuit board 10, the whole testing assembly 20 and the adapting circuit board 10 can be grounded together, so as to increase the grounding area and reduce the noise wave of the test. Furthermore, the recess 2321 disposed at the bottom of the conductive block 23 can effectively avoid the signal circuit 11 that transmits the result detected by the probe 22, so as to avoid affecting the test result, and maintain the impedance consistency of the adapting circuit board 10.
Although the present invention has been described with reference to the foregoing embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (14)
1. A transmission line testing module, comprising:
the adapter circuit board is provided with a signal circuit and a grounding metal layer, and the grounding metal layer surrounds part of the signal circuit; and
a testing assembly, which is arranged on the adapting circuit board and corresponds to the grounding metal layer, and the testing assembly comprises:
an insulating base having a first side and a second side opposite to each other;
the probes penetrate through the insulating base, so that two end parts of each probe protrude out of the first side surface and the second side surface of the insulating base; and
the conductive block is coated on the insulating base, the probes protruding out of the first side face of the insulating base are exposed out of the first surface, the probes protruding out of the second side face of the insulating base are exposed out of the second surface, a groove is concavely arranged on the second surface, when the testing assembly is assembled on the adapter circuit board, the second surface is contacted with the grounding metal layer, and the groove corresponds to the signal circuit.
2. The transmission line test module of claim 1, wherein the dielectric base is spaced apart from the transition circuit board.
3. The transmission line testing module of claim 1, wherein the first surface has a receiving slot corresponding to the first side surface of the insulating base and disposed at a position where the first side surface is exposed, and a distance from a bottom surface of the receiving slot to the first surface is smaller than a distance from the first side surface to the first surface.
4. The transmission line test module of claim 3, wherein the shape of the receiving slot is the same as a to-be-tested connector of a transmission line.
5. The transmission line testing module of claim 1, further comprising a lower module and a tray, wherein the adapter circuit board is assembled to the lower module, and the tray is assembled to the lower module, covering the adapter circuit board and exposing the upper surface of the testing assembly to the tray.
6. The transmission line test module according to claim 5, characterized in that the carrier tray has a test recess, the test element being located in the test recess.
7. The transmission line test module of claim 6, wherein the carrier tray further has two relief grooves disposed in the test recess and adjacent to the test element.
8. A transmission line testing method, comprising:
obtaining a transmission line test module according to claim 1;
arranging the transmission line testing module on a lower module;
assembling a bearing disc on the lower module, covering the switching circuit board and exposing the upper surface of the test assembly out of the bearing disc;
placing a connector to be tested of a transmission line on the first surface of the conductive block corresponding to the probes; and
and pressing an upper module on the bearing disc, and starting the test.
9. The transmission line testing method of claim 8, wherein the transmission line has an identification code, the upper module has a transparent portion corresponding to the identification code, and the transmission line testing method further comprises:
a reader is used to obtain the identification code through the perspective part.
10. The transmission line testing method of claim 8, wherein the insulating base is spaced apart from the adapting circuit board.
11. The transmission line testing method of claim 8, wherein the first surface of the conductive block has a receiving slot corresponding to the first side surface of the insulating base and disposed at the position where the first side surface is exposed, and a distance from a bottom surface of the receiving slot to the first surface is smaller than a distance from the first side surface to the first surface.
12. The transmission line testing method of claim 8, wherein the shape of the receiving slot is the same as the shape of the connector to be tested of the transmission line.
13. The transmission line testing method of claim 8, wherein the carrier plate has a testing recess, and the testing element is located at the testing recess.
14. The transmission line testing method of claim 13, wherein the carrier tray further has two relief grooves disposed in the testing recess and adjacent to the testing element.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911139988.9A CN112824912A (en) | 2019-11-20 | 2019-11-20 | Transmission line test module and transmission line test method |
| TW108143495A TWI726509B (en) | 2019-11-20 | 2019-11-28 | Cable test module and method of cable test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911139988.9A CN112824912A (en) | 2019-11-20 | 2019-11-20 | Transmission line test module and transmission line test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112824912A true CN112824912A (en) | 2021-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911139988.9A Pending CN112824912A (en) | 2019-11-20 | 2019-11-20 | Transmission line test module and transmission line test method |
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| CN (1) | CN112824912A (en) |
| TW (1) | TWI726509B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6116112B2 (en) * | 2011-02-04 | 2017-04-19 | スリーエム イノベイティブ プロパティズ カンパニー | IC device socket |
| WO2015195970A1 (en) * | 2014-06-20 | 2015-12-23 | Xcerra Coproration | Test socket assembly and related methods |
| JP6046200B2 (en) * | 2015-04-30 | 2016-12-14 | 東京特殊電線株式会社 | Transmission line and inspection jig |
| KR102015788B1 (en) * | 2017-11-30 | 2019-08-29 | 리노공업주식회사 | Test device |
| CN110441640A (en) * | 2019-09-10 | 2019-11-12 | 宁波吉品科技有限公司 | A kind of test device |
| CN211528556U (en) * | 2019-11-20 | 2020-09-18 | 嘉联益电子(昆山)有限公司 | Transmission line test module |
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2019
- 2019-11-20 CN CN201911139988.9A patent/CN112824912A/en active Pending
- 2019-11-28 TW TW108143495A patent/TWI726509B/en active
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| Publication number | Publication date |
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| TWI726509B (en) | 2021-05-01 |
| TW202120943A (en) | 2021-06-01 |
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