WO2021174583A1

WO2021174583A1 - Transmission module testing device

Info

Publication number: WO2021174583A1
Application number: PCT/CN2020/079523
Authority: WO
Inventors: 詹大伟; 何家勇; 王亚; 陈勇利
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-03-02
Filing date: 2020-03-16
Publication date: 2021-09-10
Also published as: CN111343050A

Abstract

The present invention provides a transmission module testing device. The testing device comprises a first plate body, a second plate body connected to the first plate body, a radio frequency signal adapter installed on the first plate body and used for being connected to an external testing instrument, and a probe assembly installed on the second plate body and used for being connected to a transmission module in an abutting manner, at least two installation holes are provided in the second plate body in a penetrating manner, the probe assembly comprises a plurality of elastic probes, each elastic probe is installed in the corresponding installation hole, and one end of each elastic probe is electrically connected to the radio frequency signal adapter, and the other end thereof is used for abutting against the transmission module. According to the transmission module testing device, the radio frequency probe assembly is used for being in contact with the transmission module, radio frequency signals of the transmission module are led out by means of the probe assembly, and then the radio frequency signal adapter is used for signal switching and is connected to an external testing instrument, such that the testing accuracy is high, and the testing device has the characteristics of easy operation, low cost, long service life and suitability for batch testing.

Description

Test device for transmission module

Technical field

The present invention relates to the field of communication technology, in particular to a testing device for a transmission module.

Background technique

With the development of 5G and consumer electronics technology, the research on multi-antenna technology has been around for a long time, and the space available for the layout of traditional radio frequency coaxial transmission modules (transmission lines) is getting smaller and smaller. Therefore, new transmission module structures (including FPC and adapters) came into being; for the design of multi-antenna radio frequency transmission modules, flexible material circuits (including adapters) are mainly used for radio frequency transmission, and the superiority of its radio frequency transmission performance plays a vital role.

technical problem

Testing the radio frequency performance of the transmission module has become an important part of the mass production test of the transmission module. A stable, reliable and accurate test device can measure the radio frequency performance of the transmission module well, and the test device must also meet the production line batch The requirements for chemical testing are easy to operate and have a long service life.

Therefore, it is necessary to provide a test device with high reliability, long service life and low cost.

Technical solutions

The object of the present invention is to provide a test device for a transmission module, which aims to improve the reliability of the test device, extend the service life of the test device, and reduce the cost of the test device.

The technical scheme of the present invention is as follows:

In order to achieve the above objective, the present invention provides a test device for a transmission module, which includes a first board, a second board connected to the first board, installed on the first board and used for A radio frequency signal adapter connected with an external test instrument and a probe assembly installed on the second board body and used for abutting with the transmission module, the second board body is penetrated with at least two mounting holes arranged at intervals, The probe assembly includes a plurality of elastic probes, each of the elastic probes is installed in each of the mounting holes, and one end of the elastic probe is electrically connected to the radio frequency signal adapter, and the other end is used for abutting The transmission module.

Further, the first board body is provided with a plurality of circuit traces respectively matched with the elastic probes, one end of the circuit trace is electrically connected with the elastic probe, and the other end is connected with the radio frequency The signal adapter is electrically connected.

Further, the elastic probe includes a first probe, a spring, and a second probe, and the first probe and the second probe are respectively connected to two ends of the spring, and the first probe is exposed in the mounting hole One end of the second probe is used to connect with the circuit trace, and the other end of the second probe exposed to the mounting hole is used to abut the transmission module.

Further, the radio frequency signal adapter is installed on a side of the first board away from the second board.

Further, the testing device of the transmission module further includes a number of fasteners, the first plate body is provided with a number of perforations, the second plate body is provided with a number of fixing holes, and the fasteners pass through After the perforation, it is connected with the fixing hole.

Further, the test device of the transmission module further includes a plurality of positioning members, a plurality of positioning holes spaced apart from the perforation are provided on the first plate body, and a plurality of positioning holes are also provided on the second plate body. Each of the positioning holes is matched with a clamping hole, and the positioning member is fastened to the clamping hole after passing through the positioning hole.

Further, the side of the second plate body away from the first plate body is convexly provided with a boss, and the side of the boss away from the second plate body is concavely provided for the transmission The module is embedded in the guide groove, the guide groove has a first groove bottom surface, one end of the mounting hole is provided on the bottom surface of the first groove, and the end of the elastic probe close to the transmission module is exposed at the bottom surface of the first groove. The bottom surface of the first groove is outside.

Further, a receiving groove corresponding to the guide groove is recessed on a side of the second plate body close to the first plate body, the receiving groove has a second groove bottom surface, and the mounting hole The other end is arranged on the bottom surface of the second groove, and one end of the elastic probe close to the first plate body is exposed outside the bottom surface of the second groove.

Beneficial effect

The beneficial effects of the present invention are:

The test device of the transmission module of the present invention uses the probe assembly for radio frequency to contact the transmission module, the radio frequency signal of the transmission module is led out through the probe assembly, and the signal is transferred through the radio frequency signal adapter and connected to an external test instrument. The structure is simple, its test accuracy is high, it has the characteristics of easy operation, low cost, long service life, and suitable for batch testing.

Description of the drawings

FIG. 1 is a schematic diagram of a three-dimensional structure of a transmission module testing device and a transmission module provided by an embodiment of the present invention;

Figure 2 is a schematic diagram of the exploded structure of Figure 1;

FIG. 3 is a top view of the transmission module testing device and the transmission module provided by the embodiment of the present invention after assembling;

Figure 4 is a cross-sectional view taken along line A-A in Figure 3;

Fig. 5 is a partial enlarged schematic diagram of the circle B in Fig. 4;

6 is a schematic diagram of the three-dimensional structure of the probe assembly and the second board body provided by the embodiment of the present invention after being assembled;

Fig. 7 is a partial enlarged schematic diagram of the circle C in Fig. 6;

FIG. 8 is a schematic diagram of a three-dimensional structure of a second plate provided by an embodiment of the present invention.

Attached icon number description:

10. Transmission module; 11. FPC board; 12, connector; 121, signal terminal; 20, first test component; 21, first board; 211, substrate; 212, circuit trace; 213, perforation; 214 , Positioning hole; 22, radio frequency signal adapter; 30, second test component; 31, second board; 311, first surface; 312, second surface; 313, mounting hole; 314, fixing hole; 315, card Holding hole; 316, boss; 317, guide groove; 318, the bottom surface of the first groove; 319, the receiving groove; 320, the bottom surface of the second groove; 32, the probe assembly; 321, the elastic probe; 322, the first probe; 323. Spring; 324. Second probe; 325. Sleeve; 40. Fastener; 50. Positioning member.

Embodiments of the present invention

The present invention will be further described below in conjunction with the drawings and embodiments.

It should be noted that all the directional indicators (such as up, down, inside, outside, top, bottom...) in the embodiments of the present invention are only used to explain the difference between the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, the element may be directly on the other element or a centering element may exist at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time.

Please refer to FIG. 1 and FIG. 2, an embodiment of the present invention provides a transmission module testing device for testing the transmission module 10. The transmission module 10 includes an FPC board 11 and a connector 12 installed on the FPC board 11.

The testing device of the transmission module includes a first testing component 20 and a second testing component 30. The first test assembly 20 includes a first board 21 and a radio frequency signal adapter 22 installed on the first board 21. The first board body 21 is a printed circuit board, and the radio frequency signal adapter 22 is connected to the circuit traces 212 on the first board body 21. The second test assembly 30 includes a second board 31 and a probe assembly 32 installed on the second board 31 and used to abut the transmission module 10. The first test assembly 20 and the second test assembly 30 are stacked, and the first board body 21 and the second board body 31 are fixedly connected, so that the probe assembly 32 is connected with the circuit trace 212 on the first board body 21.

During the test, the second test component 30 is matched and abutted with the connector 12 of the transmission module 10 to be tested, and the first test component 20 is connected to an external test instrument in cooperation. Specifically, one end of the probe assembly 32 of the second test assembly 30 away from the first board 21 abuts against the signal terminal 121 of the connector 12 to facilitate the extraction of the radio frequency signal of the transmission module 10. The radio frequency signal adapter 22 of the first test assembly 20 is connected to an external test instrument through a cable. Therefore, the first test component 20 and the second test component 30 cooperate to extract and transmit the radio frequency signal of the transmission module 10 to the test instrument to complete the test.

Referring to FIGS. 3 to 5 and 8, the second board 31 is vertically penetrated with at least two mounting holes 313 spaced apart, the probe assembly 32 includes a plurality of spaced elastic probes 321, and each elastic probe 321 Installed in each mounting hole 313, one end of the elastic probe 321 is electrically connected to the RF signal adapter 22, and the other end of the elastic probe 321 is used to abut the transmission module 10, and the elastic probes 321 are not mutually connected. When connected, when a certain elastic probe 321 is damaged, the elastic probe 321 can be directly replaced, avoiding the replacement of the probe assembly 32 as a whole, thereby saving cost.

The number of each elastic probe 321 can be set according to actual needs. For example, when three signal terminals 121 of the connector 12 need to be tested, the number of elastic probes 321 is set to at least three. In the above situation, when the number of elastic probes 321 exceeds 3, only the remaining elastic probes 321 need to be left empty or grounded. It is worth mentioning that multiple flexible probes 321 can be set to form multiple sets of test units, and multiple sets of signal terminals 121 can be tested at the same time to improve the test efficiency. One signal terminal 121 is abutted for radio frequency parameter testing, and the other two are respectively abutted with the other two signal terminals 121 for conduction testing. At this time, it is only necessary to adjust the circuit structure of the first board body 21 adaptively. As for the distance between the elastic probes 321, the distance between the signal terminals 121 of the connector 12 can be designed.

2 to FIG. 8, in this embodiment, the second board 31 has a first surface 311 on the side close to the first board 21, a second surface 312 disposed opposite to the first surface 311, and a mounting hole 313 From the first surface 311 to the second surface 312, the elastic probe 321 includes a first probe 322, a spring 323, a second probe 324, and a sleeve 325. The first probe 322, the spring 323, and the second probe 324 are from top to bottom Set up and connected in sequence, the spring 323 is slidably installed in the sleeve 325, the first probe 322 and the second probe 324 penetrate into the sleeve 325 from the two ends of the sleeve 325, the first probe 322 and the second probe 324 are respectively Connected to both ends of the spring 323. The first probe 322 and the second probe 324 are exposed at both ends of the mounting hole 313, and the first probe 322 is in elastic contact with the circuit trace 212 on the first board 21, and the second probe 324 is in contact with the signal terminal 121 of the connector 12. The elastic contact can lead the radio frequency signal in the transmission module 10 to the first board 21.

The first board body 21 includes a substrate 211 and the above-mentioned circuit traces 212 provided on the substrate 211. During the test, the first probe 322 of the elastic probe 321 abuts against the circuit trace 212 so as to lead out the radio frequency signal in the transmission module 10. The radio frequency signal adapter 22 is installed on the side of the substrate 211 away from the second board 31 and connected to the circuit trace 212 so as to transmit the radio frequency signal to the external test instrument to realize the test of the transmission module 10 by the external test instrument. The external test instrument is a radio frequency parameter measuring instrument such as a network analysis instrument. Here, the radio frequency signal adapter 22 is an SMA connector, but it is for reference only. Any connector that can lead out radio frequency signals is applicable to this patent.

The testing device of the transmission module also includes a number of fasteners 40. The first plate body 21 is provided with a number of perforations 213, and the second plate body 31 is provided with a number of fixing holes 314. The holes 314 are connected, and the second board 31 and the first board 21 can be detachably fixed together by the fastener 40.

As a preferred embodiment, the testing device of the transmission module further includes a number of positioning members 50, the first plate body 21 is also provided with a number of positioning holes 214 spaced apart from the perforation 213, and the second plate body 31 is also provided with a number of and Each positioning hole 214 is matched with a clamping hole 315, the positioning member 50 passes through the positioning hole 214 and then is firmly connected to the clamping hole 315. The relative position between the second plate 31 and the first plate 21 can be accurately determined by the positioning member 50 respectively mating with the corresponding clamping holes 315 on the second plate body 31 and the positioning holes 214 on the first plate body 21 , So that the probe assembly 32 and the corresponding circuit trace 212 on the first board body 21 can be electrically connected quickly.

Please refer to Figures 2 and 6 to Figure 8. As a preferred embodiment, the side of the second plate 31 away from the first plate 21, that is, the second surface 312 is provided with a boss 316. The shape of the boss 316 is based on The shape of the connector 12 is designed to be matched, so that the boss 316 is engaged with the connector 12 during testing. A guide groove 317 is recessed on the side of the boss 316 away from the second board 31, and the guide groove 317 has a guiding function. The guide groove 317 has a first groove bottom surface 318. One end of the mounting hole 313 is provided on the first groove bottom surface 318 and communicates with the guide groove 317. The end of the elastic probe 321 close to the transmission module 10 is exposed on the first groove bottom surface 318 outside. During the test, the connector 12 on the transmission module 10 can be embedded in the guide groove 317, and the guide groove 317 can guide the second board 31 and the connector 12 to align with each other to ensure the elastic probe 321 and the signal terminal of the connector 12 121 can be accurately contacted.

A receiving groove 319 corresponding to the guide groove 317 is recessed on the side of the second plate 31 close to the first plate 21, that is, on the first surface 311. The receiving groove 319 has a second groove bottom surface 320 and the other of the mounting hole 313 One end is arranged on the bottom surface 320 of the second groove and communicates with the receiving groove 319. The end of the elastic probe 321 close to the first plate body 21 is exposed outside the bottom surface 320 of the second groove to facilitate the circuit on the first plate body 21 The trace 212 and the elastic probe 321 can elastically contact each other.

In this application, the first test component 20 and the second test component 30 realize the radio frequency signal transfer from the transmission module 10 to the test instrument, which has the following advantages:

1. It is only necessary to adaptively design the first test assembly 20 and the second test assembly 30 according to the structure of the connector 12, without requiring specific requirements for the test instrument and its interface or the elastic probe 321, which saves costs;

2. During the test, if the second test component 30 or the first test component 20 is worn or damaged, it is easy to replace and save costs;

3. The elastic probe 321 of the second test assembly 30 can be precisely designed to accurately align and abut with the connector 12, and the test accuracy is high;

4. Both the first test component 20 and the second test component 30 are plate-shaped structures, which are easy to integrate with tooling and fixtures to meet the requirements of batch testing on the production line;

5. The circuit structure of the first board body 21 can be flexibly designed, and multiple sets of flexible probes 321 can be selected to realize multiple sets of tests at the same time, which improves the test efficiency.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these are all protected by the present invention. Scope.

Claims

A test device for a transmission module, which is characterized by comprising a first board body, a second board body connected to the first board body, installed on the first board body and used for communicating with an external test instrument A connected radio frequency signal adapter and a probe assembly installed on the second board body and used to abut the transmission module, the second board body penetrating through at least two mounting holes arranged at intervals, the probe assembly It includes a plurality of elastic probes, each of the elastic probes is installed in each of the mounting holes, and one end of the elastic probe is electrically connected with the radio frequency signal adapter, and the other end is used to abut the transmission module .
The testing device of the transmission module according to claim 1, wherein the first board body is provided with a plurality of circuit traces respectively matched with each of the elastic probes, and one end of the circuit trace It is electrically connected to the elastic probe, and the other end is electrically connected to the radio frequency signal adapter.
The test device of the transmission module according to claim 2, wherein the elastic probe comprises a first probe, a spring, and a second probe, and the first probe and the second probe are respectively connected to the spring Both ends are connected, one end of the first probe exposed to the mounting hole is used to connect with the circuit trace, and the other end of the second probe exposed to the mounting hole is used to abut the transmission module .
The testing device of the transmission module according to claim 1, wherein the radio frequency signal adapter is installed on a side of the first board away from the second board.
The test device of the transmission module according to claim 1, wherein the test device of the transmission module further comprises a plurality of fasteners, the first plate body is provided with a plurality of perforations, and the second plate A number of fixing holes are provided on the body, and the fasteners are connected with the fixing holes after passing through the perforations.
The test device of the transmission module according to claim 5, wherein the test device of the transmission module further comprises a plurality of positioning members, and the first plate body is also provided with a plurality of spaced apart from the perforation Positioning holes, the second plate body is also provided with a plurality of clamping holes matching with each of the positioning holes, and the positioning member is fastened to the clamping holes after passing through the positioning holes.
The testing device of the transmission module according to claim 1, wherein a convex boss is protruded on a side of the second board away from the first board, and the boss is away from the One side of the second board is recessed with a guide groove for embedding the transmission module, the guide groove has a first groove bottom surface, one end of the mounting hole is provided on the first groove bottom surface, the One end of the elastic probe close to the transmission module is exposed outside the bottom surface of the first groove.
7. The testing device of the transmission module according to claim 7, wherein a receiving groove corresponding to the guide groove is recessed on a side of the second plate body close to the first plate body, The receiving groove has a second groove bottom surface, the other end of the mounting hole is provided on the second groove bottom surface, and the end of the elastic probe close to the first plate body is exposed on the second groove bottom surface outside.