WO2022000591A1

WO2022000591A1 - Test tool for dielectric waveguide filter

Info

Publication number: WO2022000591A1
Application number: PCT/CN2020/102981
Authority: WO
Inventors: 韩莉; 李陆龙; 王红军; 姜华; 岳月华
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声精密制造科技(常州)有限公司
Priority date: 2020-06-30
Filing date: 2020-07-20
Publication date: 2022-01-06
Also published as: CN111722045A

Abstract

A test tool for a dielectric waveguide filter (5), comprising a test tool base (1), wherein the test tool base (1) comprises a first surface (11) and a second surface (12) arranged opposite to the first surface (11); the first surface (11) is installed with an indenter (2) and a test circuit board (3); the side of the test circuit board (3) located on the first surface (11) is provided with a ground plug (8) and signal transmission plugs (9); the side of the test circuit board (3) located on the second surface (12) is provided with a test SMA connector (6); and the test SMA connector (6) is connected to the signal transmission plugs (9). The side of the proposed test circuit board (3) close to the second surface (12) is soldered to a test SMA connector (6), and the test SMA connector (6) is close to said side. When the filter (5) is tested, the test SMA connector (6) does not need to directly come in contact with the filter (5), i.e. the filter (5) will not be damaged. Moreover, the structure of the test tool is simple and convenient.

Description

Test Fixtures for Dielectric Waveguide Filters

technical field

The invention relates to the field of filter component testing, in particular to a testing tool for a dielectric waveguide filter.

Background technique

For a long time, filters have played an extremely important role in the processing of electronic signals, which are mainly used to filter signals of used frequencies and suppress interfering signals. However, in the existing technology, when the filter is tested, it will have an impact on the filter, and even damage the filter in severe cases, and the structure of many filter testing tooling is very complicated, and the process of testing the filter is very complicated. Cumbersome and time-consuming.

Therefore, it is necessary to provide a test tool for testing the dielectric waveguide filter quickly and easily without destroying the filter.

technical problem

The purpose of the present invention is to provide a simpler and more convenient testing tool for the dielectric waveguide filter.

technical solutions

The technical scheme of the present invention is as follows:

The invention provides a test tool for a dielectric waveguide filter, including a test tool base, the test tool base includes a first surface and a second surface opposite to the first surface, the first surface is mounted with a pressure head and a test circuit board, the side of the test circuit board located on the first surface is provided with a grounding plug-in and a signal transmission plug-in, the side of the test circuit board located on the second surface is provided with a test SMA connector, the The test SMA connector is connected to the transmission insert.

Further, a limit fixture is provided on the top of the test circuit board, and the limit fixture is fixed on the first surface.

Further, the limiting fixture has an installation position, and a signal shielding block is fixedly connected inside the installation position.

Further, a filter to be tested is also arranged in the installation position, and the filter is arranged on the top of the signal shielding block.

Further, the grounding plug and the signal transmission plug are connected to the filter through the signal shielding block.

Further, the top of the filter is provided with the pressure head, and the pressure head is pressed against the filter.

Further, the first surface is provided with a first groove for accommodating the test circuit board, and the second surface is provided with a second groove for accommodating the test SMA device.

Further, the grounding plug-in is a grounding pin, and the signal transmission plug-in is an input/output pin.

Further, mounting holes for accommodating the test SMA connectors are opened between the first surface and the second surface, the number of the mounting holes is two, and the two test SMA connectors are correspondingly mounted on the test SMA connectors. in the mounting hole.

beneficial effect

The beneficial effects of the present invention are:

The invention provides a test tool for a dielectric waveguide filter, including a test tool base, the test tool base includes a first surface and a second surface opposite to the first surface, the first surface is mounted with a pressure head and a test circuit board, the side of the test circuit board located on the first surface is provided with a grounding plug-in and a signal transmission plug-in, the side of the test circuit board located on the second surface is provided with a test SMA connector, the The test SMA connector is connected to the transmission insert. In the present invention, the side of the test circuit board exposed to the second surface is welded with a test SMA head, and the test SMA head is close to this side. When testing the filter, the test SMA head does not need to directly contact the filter, that is, it will not The filter is destroyed, and the structure of the test tool is simple and convenient.

Description of drawings

Fig. 1 is the overall structure exploded schematic diagram of the test tool of the present invention;

Fig. 2 is the overall structure schematic diagram of the present invention;

Fig. 3 is the structural schematic diagram of the limiting fixture of the present invention;

Fig. 4 is the sectional view of A-A direction in Fig. 3;

Fig. 5 is the schematic diagram of the test circuit board of the present invention;

FIG. 6 is a schematic diagram of the test SMA connector of the present invention.

Embodiments of the present invention

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

The present invention will be further described below with reference to the accompanying drawings and embodiments. Referring to FIG. 1 , a test fixture for a dielectric waveguide filter includes a test fixture base 1 , and the test fixture base 1 includes a first surface 11 and a second surface 12 disposed opposite to the first surface 11 . The first surface 11 is installed with an indenter 2 and a test circuit board 3, and the test circuit board 3 is provided with a grounding plug-in and a signal transmission plug-in on one side of the first surface 11. In this embodiment, the grounding plug-in is the grounding Pin 8, and the signal transmission plug-in In order to input/output the Pin 9, the side of the test circuit board 3 located on the second surface 12 is provided with a test SMA connector 6, and the test SMA connector 6 is connected with the transmission plug-in.

In this embodiment, the first surface 11 is provided with a first groove for accommodating the test circuit board 3 , the second surface 12 is provided with a second groove for accommodating the test SMA device, the first surface 11 and the second surface Mounting holes for accommodating the test SMA connectors 6 are opened between 12 , there are two mounting holes, and the two test SMA connectors 6 are correspondingly mounted in the mounting holes.

In this embodiment, the test fixture of the dielectric waveguide filter includes a test fixture base 1, and the test fixture base 1 includes a first surface 11 and a second surface 12 opposite to the first surface 11. The first surface 11 is installed with a An indenter 2, the first surface 11 is also provided with a first groove for accommodating the test circuit board 3, the size and thickness of the first groove are consistent with the shape of the test circuit board 3, so that the appearance of the first surface 11 is Clean and flat, the side of the test circuit board 3 close to the first surface 11 is provided with a ground pin 8 and an input/output pin 9, the ground pin 8 and the input/output pin 9 are exposed on the first surface 11, and the test circuit board is 3. The side close to the second surface 12 is provided with a test SMA connector 6, the first surface 11 and the second surface 12 are provided with mounting holes for accommodating the test SMA connector 6, and the test SMA connector 6 is opened from the second side of the test tool base 1. The surface 12 is exposed, and the second groove of the second surface 12 of the test jig base 1 can be used to place the instrument connected to the test SM connector 6 . The input/output pins 9 on both sides of the test circuit board 3 and the test SMA connector 6 are connected, and the test SMA connector 6 is directly connected to the input/output pin 9 through the test circuit board 3 .

The top of the test circuit board 3 is provided with a limit fixture 4, which is fixed on the first surface 11 of the test fixture base 1. The limit fixture 4 is provided with an installation position, and a signal shielding block 7 is fixedly connected to the inside of the installation position. The inside of the installation position of the position fixture 4 is fixedly connected to the signal shielding block 7 by means of screws.

Specifically, a filter 5 to be tested is also placed in the installation position of the limiting fixture 4 , the filter 5 is also arranged on the top of the signal shielding block 7 , and the ground Pin 8 and the input/output Pin 9 are connected through the signal shielding block 7 on filter 5.

The limit fixture 4 defines the position of the filter 5. When the test tool is working, the position of the filter 5 will not change, and the test is more convenient. The installation position of the limit fixture 4 can be divided into two parts. , a part is close to the test circuit board 3, this part is fixed with a signal shielding block 7, the ground pin 8 and the input/output pin 9 can penetrate the signal shielding block 7, the function of the signal shielding block 7 is to pass the test filter 5 When the performance is high, some external interference can be shielded, thereby preventing the impact on the test signal, and the installation position of the limit fixture 4 is close to the other part of the indenter 2. A filter 5 is placed, and the size of the filter 5 is the same as The size of the installation position is the same, the filter 5 is placed on the signal shielding block 7 , the input/output pin 9 and the grounding pin 8 can directly contact the filter 5 through the signal shielding block 7 .

Further, the top of the filter 5 is provided with a pressure head 2, and the pressure head 2 is pressed against the filter 5, that is, the filter 5 is fixed in the limit fixture 4, which plays a fixed role, so that the filter 5 can be connected with the filter 5. Ground pin 8 and input/output pin 9 are in contact.

In summary, the present invention provides a test tool for a dielectric waveguide filter, including a test tool base 1 , and the test tool base 1 includes a first surface 11 and a second surface disposed opposite to the first surface 11 12. An indenter 2 and a test circuit board 3 are installed on the first surface 11. The test circuit board 3 is provided with a grounding plug-in and a signal transmission plug-in on one side of the first surface 11. One side of the second surface 12 is provided with a test SMA connector 6, and the test SMA connector 6 is connected to the transmission plug-in. The instrument for testing the filter is connected to the test SMA connector 6 at the bottom of the test tool base 1, and the test SMA connector 6 is welded to the test circuit board 3, and the other side of the test circuit board 3 is welded with the ground pin 8 and the input/output pin. 9. The test SMA connector 6 corresponds to the input/output pin 9, and the input/output pin 9 and ground pin 8 can directly contact the filter 5 through the signal shielding block 7, and the indenter 2 directly presses the filter 5. It can be ensured that the filter 5 can definitely contact the input/output pin 9 and the ground pin 8, that is, the test SMA connector 6 directly contacts the filter 5 when the input/output pin 9 is in contact with the filter 5. In this way, the performance of the filter 5 can be directly tested under the condition that the test SMA connector 6 does not contact the filter 5, and the signal shielding block 7 can also shield the external interference signal, thereby reducing the impact on the test signal, Moreover, the test tool has a simple structure and is convenient to use.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein can, for example, be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

The above are only the embodiments of the present invention. It should be pointed out 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 belong to the present invention. scope of protection.

Claims

A test tool for a dielectric waveguide filter includes a test tool base, the test tool base includes a first surface and a second surface opposite to the first surface, wherein the first surface is mounted with a pressure head and a test circuit board, the side of the test circuit board located on the first surface is provided with a grounding plug-in and a signal transmission plug-in, the side of the test circuit board located on the second surface is provided with a test SMA connector, The test SMA connector is connected to the transmission insert.
The test tool for a dielectric waveguide filter according to claim 1, wherein a limit fixture is provided on the top of the test circuit board, and the limit fixture is fixed on the first surface.
The test tool for a dielectric waveguide filter according to claim 2, wherein the limiting fixture has an installation position, and a signal shielding block is fixedly connected inside the installation position.
The test tool for a dielectric waveguide filter according to claim 3, wherein a filter to be tested is further arranged in the installation position, and the filter is arranged on the top of the signal shielding block.
The test tool for a dielectric waveguide filter according to claim 4, wherein the grounding plug and the signal transmission plug are connected to the filter through the signal shielding block.
The test tool for a dielectric waveguide filter according to claim 5, wherein the pressure head is provided on the top of the filter, and the pressure head is pressed against the filter.
The test tool for a dielectric waveguide filter according to any one of claims 1 to 6, wherein the first surface is provided with a first groove for accommodating the test circuit board, and the second surface is provided with a first groove for accommodating the test circuit board. A second groove for accommodating the test SMA device is opened.
The test tool for a dielectric waveguide filter according to claim 7, wherein the grounding plug-in is a grounding pin, and the signal transmission plug-in is an input/output pin.
The test tool for a dielectric waveguide filter according to claim 7, wherein a mounting hole for accommodating the test SMA connector is opened between the first surface and the second surface, and the mounting hole There are 2, and the 2 test SMA connectors are correspondingly installed in the installation holes.