A test device for a filter

Abstract

The application discloses a filter testing device, which comprises a base assembly and a pressing block rotationally connected with the base assembly, a filter is arranged on the base assembly, a radio frequency connector assembly is fixedly arranged on the pressing block, the lead pin of the radio frequency connector assembly is in contact with the electrode end of the filter after the pressing block is rotationally attached to the base assembly, and the radio frequency connector assembly is connected with an external vector network analyzer; the testing device is free from the dependence on a traditional probe station, does not need to be operated by a special person, is more flexible in testing, effectively improves testing efficiency, and reduces testing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter, in particular to a kind of filter testing device. BACKGROUND

[0002] Filter is an important passive device in microwave system circuit, its function is to allow the microwave signal of specific frequency band to pass while shielding other frequency band signals, and is widely used in radar, communication and other fields.

[0003] Chip filter is a common input and output end form as coplanar waveguide structure, this form is easy to process and realize, and it is convenient for filter to be assembled and used by gold wire bonding, for the testing of the chip filter with this input and output end structure, traditional probe is usually used for testing, which needs to rely on probe station and be operated by a special person, and the testing efficiency is low and the cost is high. SUMMARY

[0004] Based on the technical problems existing in the background art, the present application provides a kind of filter testing device, which does not need special operation, is more flexible in testing, effectively improves the testing efficiency and reduces the testing cost.

[0005] The filter testing device provided by the present application comprises a base assembly and a pressing block rotatably connected with the base assembly, the filter is arranged on the base assembly, a radio frequency connector assembly is fixedly arranged on the pressing block, the lead pins of the radio frequency connector assembly are in contact with the electrode terminals of the filter after the pressing block is rotated and attached to the base assembly, and the radio frequency connector assembly is connected with an external vector network analyzer.

[0006] Further, the base assembly comprises a bottom plate and a support plate fixed on the bottom plate, protrusions are arranged on the upper surfaces of the two sides of the support plate, and a limiting space for limiting the filter is formed between the two protrusions.

[0007] Further, one end of the support plate is provided with a rotating shaft, and the two ends of the rotating shaft are rotatably connected with the end portions of the pressing block.

[0008] Further, the radio frequency connector assembly comprises a first radio frequency connector and a second radio frequency connector, the pressing block is a hollow structure, and the first lead pin of the first radio frequency connector and the second lead pin of the second radio frequency connector both extend into the hollow cavity through the pressing block.

[0009] Further, the electrode of the filter comprises an input terminal, an output terminal and a ground terminal, the input terminal and the output terminal are oppositely arranged, a first gap is arranged between the input terminal and the ground terminal, a second gap is arranged between the output terminal and the ground terminal, the input terminal, the output terminal, the ground terminal, the first gap and the second gap jointly form a CPW structure, the first lead pin and the second lead pin are oppositely arranged, and the first lead pin is in contact with the input terminal and the second lead pin is in contact with the output terminal after the pressing block is rotated and attached to the support plate.

[0010] Further, the first and second guide pins are respectively fixedly provided with limiting blocks, the first guide pin, the second guide pin and the limiting blocks are arranged in parallel, and the limiting blocks are in contact with the grounding end after the pressing block is attached to the support plate.

[0011] Further, the first guide pin is detachably arranged at the end of the first radio frequency connector, the second guide pin is detachably arranged at the end of the second radio frequency connector, and the thickness of the limiting block is 0.3-0.7mm, preferably 0.5mm.

[0012] Further, the pressing block is provided with a handle at one end away from the base assembly, and the handle is detachably connected with the pressing block.

[0013] The filter testing device provided by the application has the advantages that: the filter testing device provided by the application structure is free from the dependence on the traditional probe station, does not need to be operated by a dedicated person, is more flexible in testing, effectively improves the testing efficiency, and reduces the testing cost; the first guide pin and the second guide pin are close in width to the input end and the output end of the filter, so as to improve the good contact of the first guide pin and the second guide pin with the input end and the output end of the filter, improve the contact stability, and further improve the testing stability of the final filter; the detachable arrangement of the first guide pin and the second guide pin facilitates the replacement of the first guide pin or the second guide pin when the first guide pin or the second guide pin is damaged, and further reduces the testing cost; the limiting block is in stable abutment with the grounding end of the filter, stably positions the filter, and enables the first guide pin and the second guide pin to stably contact the input end and the output end of the filter; the slight downward bending of the first guide pin and the second guide pin increases the contact reliability of the first guide pin and the second guide pin with the input end and the output end of the filter. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a structural schematic diagram of the application;

[0015] Figure 2 FIG. 2 is a side view of the application; Figure 1

[0016] Figure 3 FIG. 4 is a structural schematic diagram of the filter;

[0017] Figure 4 FIG. 5 is a structural schematic diagram of the filter arranged on the base assembly;

[0018] Figure 5 FIG. 6 is a structural schematic diagram of the radio frequency connector assembly arranged on the pressing block;

[0019] Figure 6 FIG. 7 is a structural schematic diagram of the contact of the radio frequency connector assembly with the filter after the pressing block is attached to the support plate;

[0020] Figure 7 ​It is a structural schematic view of the first radio frequency connector and the filter;

[0021] Figure 8 It is a schematic view of the radio frequency connector assembly, the filter, and the appropriate network analyzer connection;

[0022] Wherein, 1 is a base assembly, 2 is a pressing block, 3 is a filter, 4 is a radio frequency connector assembly, 5 is a handle, 11 is a bottom plate, 12 is a support plate, 13 is a protruding block, 14 is a rotating shaft, 31 is an input end, 32 is an output end, 33 is a ground end, 41 is a first radio frequency connector, 42 is a second radio frequency connector, 43 is a first lead pin, 44 is a second lead pin, and 45 is a limiting block. DETAILED DESCRIPTION

[0023] In the following, the technical solutions of the present application are described in detail through specific embodiments. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application. Therefore, the present application is not limited to the specific implementation disclosed below.

[0024] As shown in Figures 1 to 8 The test device for the filter provided by the present application includes a base assembly 1 and a pressing block 2 rotationally connected with the base assembly 1. The filter 3 is arranged on the base assembly 1, and the radio frequency connector assembly 4 is fixedly arranged on the pressing block 2. After the pressing block 2 is rotated and attached to the base assembly 1, the lead pins of the radio frequency connector assembly 4 are in contact with the electrode ends of the filter 3. The radio frequency connector assembly 4 is connected with an external vector network analyzer.

[0025] The lead pins of the radio frequency connector assembly 4 are in contact with the electrode ends of the filter by directly rotating the pressing block 2, so as to realize the test of the filter. At the same time, the pressing block 2 presses and limits the filter to be fixed, thereby avoiding the defect that the test result is inaccurate due to displacement of the filter during the test. The filter test device is free from the dependence on the traditional probe station, and does not need to be operated by a dedicated person. The test is more flexible, the test efficiency is effectively improved, and the test cost is reduced.

[0026] In the embodiment, the base assembly 1 comprises a bottom plate 11 and a support plate 12 fixed on the bottom plate 11, and protrusions 13 are arranged on the upper surface of the support plate 12, and a limiting space for limiting the filter 3 is formed between the two protrusions 13. The bottom plate 11 is used to stabilize the entire test device and avoid safety defects such as shaking and tilting of the test device. The bottom plate 11, the support plate 12, and the protrusions 13 can be integrally formed or separately formed and then fixed as a whole by screws. Alternatively, the bottom plate 11 and the support plate 12 can be integrally formed, and then the protrusions 13 are fixed to the support plate 12 by screws. In this way, the size of the limiting space can be adjusted by changing the size of the protrusions 13, so that the test device can adapt to the test needs of filters of different specifications.

[0027] The rotary connection between the pressing block 2 and the support plate 12 can be achieved by arranging a rotating shaft 14 at one end of the support plate 12, and the two ends of the rotating shaft 14 are rotatably connected to the end portions of the pressing block 2. The rotation of the pressing block 2 facilitates the replacement of the filter 3 and the adjustment of the contact effectiveness of the probe pins and the electrode ends of the filter 3 by adjusting the adhesion pressure between the pressing block 2 and the support plate 12.

[0028] Specifically, the electrode end of the filter 3 comprises an input end 31, an output end 32, and a ground end 33. The input end 31 and the output end 32 are oppositely arranged, a first gap 34 is arranged between the input end 31 and the ground end 33, and a second gap 35 is arranged between the output end 32 and the ground end 33. The input end 31, the output end 32, the ground end 33, the first gap 34, and the second gap 35 together form a CPW structure. The first gap 34 is used to separate the input end 31 and the ground end 33 to avoid mutual electrical connection. Similarly, the second gap 35 is used to separate the output end 32 and the ground end 33 to avoid mutual electrical connection.

[0029] In order to test the input end 31 and the output end 32 of the filter 3, the radio frequency connector assembly 4 comprises a first radio frequency connector 41 and a second radio frequency connector 42. The pressing block 2 is a hollow structure, the first probe pin 43 of the first radio frequency connector 41 and the second probe pin 44 of the second radio frequency connector 42 extend into the hollow cavity through the pressing block 2, and the first probe pin 43 and the second probe pin 44 are oppositely arranged. After the pressing block 2 is rotated and attached to the support plate 12, the first probe pin 43 contacts the input end 31, and the second probe pin 44 contacts the output end 32.

[0030] The first probe needle 43 and the second probe needle 44 are close to the width of the input end 31 and the output end 32 of the filter 3, so that the first probe needle 43 and the second probe needle 44 are in good contact with the input end 31 and the output end 32 of the filter 3, the contact stability is improved, and the test stability of the final filter is improved. For example, the width of the first probe needle 43 and the second probe needle 44 is 0.3mm, so that the contact area between the probe needle and the electrode end is maximized, and the test accuracy is improved.

[0031] In addition, the first probe needle 43 is detachably arranged at the end of the first radio frequency connector 41, and the second probe needle 44 is detachably arranged at the end of the second radio frequency connector 42, so that the first probe needle 43 or the second probe needle 44 can be replaced when damaged, and the test cost is further reduced.

[0032] The input end 31 and the output end 32 of the filter 3 are tested through the first radio frequency connector 41 and the second radio frequency connector 42, then the data fed back by the first radio frequency connector 41 and the second radio frequency connector 42 are read by the vector network analyzer, and the data are saved, which provides a data basis for analyzing the function of the filter later.

[0033] In the embodiment, in order to avoid the defect that the contact stability between the probe needle and the electrode end is poor, the first probe needle 43 and the second probe needle 44 are respectively fixedly provided with limiting blocks 45 on both sides, and the first probe needle 43, the second probe needle 44 and the limiting blocks 45 are arranged in parallel. After the pressing block 2 is attached to the supporting plate 12, the limiting block 45 is in contact with the grounding end 33, and the thickness of the limiting block is 0.3-0.7mm. If the thickness of the limiting block is too thin, the limiting block may not be in contact with the grounding end 33 during use, and if the thickness of the limiting block is too thick, the grounding end 33 may be damaged. Preferably, the thickness of the limiting block is 0.5mm. After the pressing block 2 is attached to the supporting plate 12, the limiting block 45 is in stable contact with the grounding end 33 of the filter 3, and the filter 3 is stably positioned, so that the first probe needle 43 and the second probe needle 44 are in stable contact with the input end 31 and the output end 32 of the filter 3. In addition, the first probe needle 43 and the second probe needle 44 are slightly bent downward to increase the contact reliability with the input end 31 and the output end 32 of the filter 3.

[0034] In order to facilitate the rotation of the pressing block 2, the pressing block 2 is provided with a handle 5 at one end away from the base assembly 1. One end of the handle 5 is detachably connected to the pressing block 2, and the other end can be arranged in a shape easy to hold, such as a circular shape. The handle 5 can also be arranged in a telescopic structure to meet the requirements of different operators.

[0035] Working process: firstly, the test device is connected to the calibrated vector network analyzer, then the pressing block 2 of the test device is lifted, the filter 3 is placed in the placing space on the supporting plate 12 and positioned, the pressing block 2 is pressed, the first needle 43 of the first radio frequency connector 41 and the second needle 44 of the second radio frequency connector 42 are in good contact with the input end 31 and the output end 32 of the filter 3 respectively, and the limiting block 45 is in good contact with the ground end 33 of the filter 3. Finally, the test data is read and saved in the vector network analyzer.

[0036] The above merely describes the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical solution and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A test apparatus for a filter, characterized in that, Includes a base assembly (1) and a pressure block (2) rotatably connected to the base assembly (1). A filter (3) is disposed on the base assembly (1). An RF connector assembly (4) is fixedly disposed on the pressure block (2). After the pressure block (2) is rotated and attached to the base assembly (1), the pins of the RF connector assembly (4) contact the electrode terminals of the filter (3). The RF connector assembly (4) is connected to the external vector network analyzer. The base assembly (1) includes a base plate (11) and a support plate (12) fixed on the base plate (11). Protrusions (13) are provided on both sides of the upper surface of the support plate (12), and a limiting space for the limiting filter (3) is formed between the two protrusions (13). The radio frequency connector assembly (4) includes a first radio frequency connector (41) and a second radio frequency connector (42). The pressure block (2) is a hollow structure. The first pin (43) of the first radio frequency connector (41) and the second pin (44) of the second radio frequency connector (42) both extend through the pressure block (2) into the hollow cavity.

2. The filter testing apparatus according to claim 1, characterized in that, One end of the support plate (12) is provided with a rotating shaft (14), and both ends of the rotating shaft (14) are rotatably connected to the ends of the pressure block (2).

3. The filter testing apparatus according to claim 1, characterized in that, The electrical terminals of the filter (3) include an input terminal (31), an output terminal (32), and a ground terminal (33). The input terminal (31) and the output terminal (32) are arranged opposite to each other. A first gap (34) is provided between the input terminal (31) and the ground terminal (33). A second gap (35) is provided between the output terminal (32) and the ground terminal (33). The input terminal (31), the output terminal (32), the ground terminal (33), the first gap (34), and the second gap (35) together constitute the CPW structure. The first pin (43) and the second pin (44) are arranged opposite to each other. After the pressure block (2) rotates and attaches to the support plate (12), the first pin (43) contacts the input terminal (31), and the second pin (44) contacts the output terminal (32).

4. The filter testing apparatus according to claim 1, characterized in that, Limiting blocks (45) are fixedly installed on both sides of the first pin (43) and the second pin (44). The first pin (43), the second pin (44), and the limiting blocks (45) are arranged in parallel to each other. After the pressure block (2) rotates and attaches to the support plate (12), the limiting block (45) contacts the grounding end 33.

5. The filter testing apparatus according to claim 4, characterized in that, The first pin (43) is detachably disposed at the end of the first RF connector (41), and the second pin (44) is detachably disposed at the end of the second RF connector (42). The first pin (43) and the second pin (44) are slightly bent downwards, and the thickness of the limiting block (45) is 0.3-0.7mm.

6. The test apparatus for the filter according to any one of claims 1-5, characterized in that, The pressure block (2) has a handle (5) at the end away from the base assembly (1), and the handle (5) is detachably connected to the pressure block (2).

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