Adjustable filter testing device

Abstract

The utility model discloses an adjustable filter testing device, which comprises a base, slide rails, a filter connecting terminal and a ground stud, four rows of slide rails are arranged on the base in a #-shaped manner, two rows of parallel transverse slide rails are fixed on the base, and each row of vertical slide rails is respectively connected with the two rows of parallel transverse slide rails in a sliding manner; the transverse sliding rails and the vertical sliding rails are provided with guide grooves respectively, each column of vertical sliding rails can move in the guide grooves of the two columns of parallel transverse sliding rails, the two ends of each vertical sliding rail are provided with filter connecting terminals respectively, the filter connecting terminals can move in the guide grooves of the vertical sliding rails, and the two sides of each vertical sliding rail are fixedly provided with grounding piles respectively. The grounding pile is electrically connected with the filter connecting terminal; the filter connecting terminal comprises a PCB, a connecting end slot and a mounting pin, the connecting end slot is connected with the PCB, the mounting pin is accommodated in the guide groove of the vertical sliding rail and is connected with the PCB, and the PCB is sequentially provided with a TOP ground layer, an S1 wiring layer, an S2 wiring layer and a BOT ground layer in a stacked mode.

Description

Technical Field

[0001] The utility model relates to the technical field of filter testing, and more particularly to an adjustable filter testing device capable of adjusting dimensions horizontally and vertically. Background Art

[0002] A filter is a circuit composed of components such as capacitors, inductors, and resistors. Its main function is to allow signals of specific frequencies to pass through while blocking or reducing signals of other frequencies. In this way, the filter can extract useful information from complex signals or eliminate unwanted interference signals. Before a filter is put into actual use, it must undergo a series of strict parameter tests to ensure that its performance meets the design requirements. When conducting these tests, the current common practice is to rely on manual installation of four wire harnesses and clamping.

[0003] However, this approach has significant drawbacks. The impedance matching problem between the wire harnesses installed on the filter and the connecting wires (such as commonly used coaxial cables) of the test equipment, as well as the interference from the external environment, directly affect the accuracy of the test results. In addition, manual operation also has a certain impact on the test. Moreover, traditional filter testing devices usually adopt fixed edges. Each time a filter of a different size is replaced, a suitable device needs to be selected. Frequent replacement of the device not only increases the operation complexity but also significantly reduces the test efficiency. Summary of the Invention

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art, and provide an adjustable filter testing device that can not only adapt to filters of different sizes but also ensure good impedance matching and be free from external environment interference, which helps to reduce errors in the test process and improve the test efficiency.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An adjustable filter testing device includes a base, sliding rails, filter connection terminals, and grounding piles. Four rows of sliding rails are arranged in a cross-shaped array on the base. Two rows of parallel horizontal sliding rails are fixed to the base, and each row of vertical sliding rails is slidably connected to the two rows of parallel horizontal sliding rails respectively;

[0007] The horizontal sliding rails and the vertical sliding rails are respectively provided with guiding grooves. Each row of vertical sliding rails can move in the guiding grooves of the two rows of parallel horizontal sliding rails. Filter connection terminals are respectively arranged at both ends of each row of vertical sliding rails, and the filter connection terminals can move in the guiding grooves of the vertical sliding rails. Grounding piles are respectively fixed on both sides of each row of vertical sliding rails, and the grounding piles are electrically connected to the filter connection terminals;

[0008] The filter connection terminal includes a PCB board, a connection terminal slot, and mounting feet. The connection terminal slot is connected to the PCB board, and the mounting feet are accommodated in the guiding slots of the vertical slide rails and connected to the PCB board. The PCB board adopts a four-layer board structure, and the TOP ground layer, S1 trace layer, S2 trace layer, and BOT ground layer are sequentially stacked on the PCB board.

[0009] Further, the connection terminal slot is connected to one side of the top layer of the PCB board, the mounting feet are connected to the bottom layer of the PCB board, and the middle layer of the PCB board is used for routing.

[0010] Further, small steel balls are provided between the bottom of the mounting feet and the guiding slots of the vertical slide rails, and the small steel balls are used to reduce the friction between the mounting feet and the slide rails.

[0011] Further, connector pads are provided at the middle position near the edge on one side of the TOP ground layer, and slot pads are provided on the other side; the other parts of the TOP ground layer are ground layers, and multiple ground vias are provided in the ground layers.

[0012] Further, connector pads are provided at the middle position near the edge on one side of the S1 trace layer, vertical inner layer traces are provided on the other side, horizontal inner layer traces are provided in the middle, and the horizontal inner layer traces are respectively connected to the connector pads and the vertical inner layer traces.

[0013] Further, connector pads are provided at the middle position near the edge on one side of the S2 trace layer, vertical inner layer traces are provided on the other side, horizontal inner layer traces are provided in the middle, and the horizontal inner layer traces are respectively connected to the connector pads and the vertical inner layer traces.

[0014] Further, connector pads are provided at the middle position near the edge on one side of the BOT ground layer, and slot pads are provided on the other side; the other parts of the BOT ground layer are ground layers, and multiple ground vias are provided in the ground layers.

[0015] Further, the mounting feet are SMA or BNC mounting feet.

[0016] Further, the guiding slots of the horizontal slide rails and the vertical slide rails respectively penetrate through their middle positions.

[0017] Further, the TOP ground layer is the top layer of the PCB board, the S1 trace layer is the middle layer of the PCB board, the S2 trace layer is the middle layer of the PCB board, and the BOT ground layer is the bottom layer of the PCB board.

[0018] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0019] This utility model not only provides a more precise and detailed measurement method for filters, but also can flexibly adapt to filters of different sizes, meeting diverse test requirements. Test engineers can test filters of various sizes without frequently replacing the device. Moreover, a stable shielded transmission line structure is adopted at the key test connection nodes of the filter to avoid interference from the external environment, thereby significantly improving the test efficiency and effectively reducing the operation cost and error rate. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the adjustable filter test device.

[0021] Figure 2 It is a schematic diagram of the filter connection terminal configuration.

[0022] Figure 3 It is a schematic diagram of the front, back, and side connections of the PCB board.

[0023] Figure 4 It is a schematic diagram of the sliding connection between the vertical slide rail and the horizontal slide rail.

[0024] Figure 5 It is a schematic diagram of the connection between the filter connection terminal and the vertical slide rail.

[0025] Figure 6 It is a schematic diagram of the connection between the vertical slide rail and the mounting feet.

[0026] Figure 7 It is a schematic diagram of the wiring and via design of the TOP layer.

[0027] Figure 8 It is a schematic diagram of the wiring and via design of the S1 routing layer.

[0028] Figure 9 It is a schematic diagram of the wiring and via design of the S2 routing layer.

[0029] Figure 10 It is a schematic diagram of the wiring and via design of the BOT layer.

[0030] Description of the Reference Numerals in the Drawings:

[0031] 1 - Base; 2 - Slide rail; 21 - Guide groove; 3 - Filter connection terminal; 31 - PCB board; 311 - TOP layer; 3111 - Connector pad; 3112 - Slot pad; 3113 - Layer; 3114 - Ground via; 3115 - Via; 312 - S1 trace layer; 3121 - Connector pad; 3122 - Vertical inner trace; 3123 - Horizontal inner trace; 3124 - Blind buried via; 3125 - Layer; 313 - S2 trace layer; 3131 - Connector pad; 3132 - Vertical inner trace; 3133 - Horizontal inner trace; 3134 - Blind buried via; 3135 - Layer; 314 - BOT layer; 3141 - Connector pad; 3142 - Slot pad; 3143 - Layer; 3144 - Ground via; 3145 - Via; 32 - Connection end slot; 33 - Mounting foot; 4 - Ground stake; 5 - Small steel ball. Detailed implementation mode

[0032] The adjustable filter test device of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Please refer to Figure 1 , the present utility model discloses an adjustable filter test device, which includes a base 1, a slide rail 2, a filter connection terminal 3 and a ground stake 4. Four columns of slide rails 2 are arranged in a cross-shaped array on the base 1. Two columns of parallel horizontal slide rails 2 are fixed to the base 1, and each column of vertical slide rails 2 is slidably connected to the two columns of parallel horizontal slide rails 2 respectively.

[0034] Please refer to Figure 4 and Figure 5 , the horizontal slide rail 2 and the vertical slide rail 2 are respectively provided with guide grooves 21, and each column of vertical slide rails 2 can move in the guide grooves 21 of the two columns of parallel horizontal slide rails 2. Filter connection terminals 3 are respectively arranged at both ends of each column of vertical slide rails 2, and the filter connection terminals 3 can move in the guide grooves 21 of the vertical slide rails 2. Ground stakes 4 are respectively fixed on both sides of each column of vertical slide rails 2, and the ground stakes 4 are electrically connected to the filter connection terminals 3.

[0035] Please refer to Figure 2 and Figure 3 , the filter connection terminal 3 includes a PCB board 31, a connection end slot 32 and a mounting foot 33. The connection end slot 32 is connected to the PCB board 31, and the mounting foot 33 is accommodated in the guide groove 21 of the vertical slide rail 2 and connected to the PCB board 31. The PCB board 31 adopts a four-layer board structure, and the PCB board 31 is sequentially stacked with a TOP layer 311, an S1 trace layer 312, an S2 trace layer 313 and a BOT layer 314.

[0036] Please refer to Figure 3, the TOP layer 311 is the top layer of the PCB board 31, the S1 trace layer 312 is the middle layer of the PCB board 31, the S2 trace layer 313 is the middle layer of the PCB board 31, and the BOT layer 314 is the bottom layer of the PCB board 31. The connection end slot 32 is connected to one side of the top layer of the PCB board 31, the mounting feet 33 are connected to the bottom layer of the PCB board 31, and the middle layer of the PCB board 31 is used for routing.

[0037] Please refer to Figure 6 , the mounting feet 33 are SMA or BNC mounting feet, and the guiding grooves 21 of the horizontal slide rail 2 and the vertical slide rail 2 respectively penetrate through their middle positions. There are small steel balls 5 between the bottom of the mounting feet 33 and the guiding grooves 21 of the vertical slide rail 2, and the small steel balls 5 are used to reduce the friction between the mounting feet 33 and the slide rail 2. The sliding connection method between the vertical slide rail 2 and the horizontal slide rail 2 is the same as the mating connection method between the mounting feet 33 and the guiding grooves 21 of the vertical slide rail 2.

[0038] Please refer to Figure 7 , at the middle position near the edge on one side of the TOP layer 311, there is a connector pad 3111, and on the other side, there is a slot pad 3112. Except for the connector pad 3111 and the slot pad 3112, the other parts of the TOP layer 311 are the layer 3113. The layer 3113 is provided with a plurality of via holes 3114, and the slot pad 3112 is provided with a plurality of through holes 3115.

[0039] Please refer to Figure 8 , at the middle position near the edge on one side of the S1 trace layer 312, there is a connector pad 3121, on the other side, there is a vertical inner layer trace 3122, and in the middle, there is a horizontal inner layer trace 3123. The horizontal inner layer trace 3123 is respectively connected to the connector pad 3121 and the vertical inner layer trace 3122, and the horizontal inner layer trace 3123 is provided with a plurality of blind buried holes 3124. Except for the connector pad 3121, the vertical inner layer trace 3122, and the horizontal inner layer trace 3123, the other parts of the S1 trace layer 312 are the layer 3125.

[0040] Please refer to Figure 9 , at the middle position near the edge on one side of the S2 trace layer 313, there is a connector pad 3131, on the other side, there is a vertical inner layer trace 3132, and in the middle, there is a horizontal inner layer trace 3133. The horizontal inner layer trace 3133 is respectively connected to the connector pad 3131 and the vertical inner layer trace 3132, and the horizontal inner layer trace 3133 is provided with a plurality of blind buried holes 3134. Except for the connector pad 3131, the vertical inner layer trace 3132, and the horizontal inner layer trace 3133, the other parts of the S2 trace layer 313 are the layer 3135.

[0041] Please refer to Figure 10, a connector pad 3141 is provided at the middle position near the edge on one side of the BOT layer 314, and a slot pad 3142 is provided on the other side. Except for the connector pad 3141 and the slot pad 3142, the other part of the BOT layer 314 is the layer 3143, and a plurality of via holes 3144 are provided in the layer 3413, and a plurality of through holes 3145 are provided in the slot pad 3142.

[0042] In summary, the present utility model has the following advantages and beneficial effects:

[0043] The present utility model not only provides a more accurate and detailed measurement means for the filter, but also can flexibly adapt to filters of different sizes, meeting diverse test requirements. Without the need to frequently replace the device, test engineers can test filters of various sizes. And a stable shielded transmission line structure is adopted at the key test connection nodes of the filter to avoid interference from the external environment, thereby significantly improving the test efficiency, and at the same time effectively reducing the operation cost and error rate.

[0044] The above description is a detailed description of the preferred feasible embodiment of the present utility model, but the embodiment is not used to limit the patent application scope of the present utility model. Any equivalent changes or modifications completed under the technical spirit disclosed by the present utility model shall fall within the patent scope covered by the present utility model.

Claims

1. A tunable filter test device, characterized in that: It includes a base, a slide rail, a filter connection terminal and a grounding pile, wherein four rows of slide rails are arranged in a tic-tac-toe array on the base, two rows of parallel horizontal slide rails are fixed to the base, and each row of vertical slide rails is slidably connected to the two rows of parallel horizontal slide rails respectively; The horizontal slide rails and the vertical slide rails are respectively provided with guide grooves, and each column of vertical slide rails can move in the guide grooves of two parallel horizontal slide rails. Filter connection terminals are respectively provided at both ends of each column of vertical slide rails, and the filter connection terminals can move in the guide grooves of the vertical slide rails. Grounding piles are respectively fixed on both sides of each column of vertical slide rails, and the grounding piles are electrically connected to the filter connection terminals. The filter connection terminal includes a PCB board, a connection end slot and a mounting foot. The connection end slot is connected to the PCB board. The mounting foot is accommodated in a guide groove of a vertical slide rail and connected to the PCB board. The PCB board adopts a four-layer board structure. The PCB board is sequentially stacked with a TOP ground layer, an S1 routing layer, an S2 routing layer and a BOT ground layer.

2. The tunable filter test device according to claim 1, characterized in that: The connection end slot is connected to one side of the top layer of the PCB board, the mounting foot is connected to the bottom layer of the PCB board, and the middle layer of the PCB board is used for routing.

3. The tunable filter test device according to claim 1, characterized in that: A small steel ball is arranged between the bottom of the mounting foot and the guide groove of the vertical slide rail, and the small steel ball is used to reduce the friction between the mounting foot and the slide rail.

4. The adjustable filter test device according to claim 1, characterized in that: A connector pad is provided in the middle position near the edge of one side of the TOP ground layer, and a slot pad is provided on the other side; the rest of the TOP ground layer is a ground layer, and the ground layer is provided with a plurality of ground through holes.

5. The tunable filter test device according to claim 1, characterized in that: A connector pad is provided in the middle position near the edge of one side of the S1 routing layer, a vertical inner routing is provided on the other side, and a horizontal inner routing is provided in the middle. The horizontal inner routing is respectively connected to the connector pad and the vertical inner routing.

6. The tunable filter test device according to claim 1, characterized in that: A connector pad is provided in the middle position near the edge of one side of the S2 routing layer, a vertical inner routing is provided on the other side, and a horizontal inner routing is provided in the middle. The horizontal inner routing is respectively connected to the connector pad and the vertical inner routing.

7. The adjustable filter test device according to claim 1, characterized in that: A connector pad is provided at a middle position near the edge of one side of the BOT ground layer, and a slot pad is provided on the other side; the rest of the BOT ground layer is a ground layer, and a plurality of ground through holes are provided on the ground layer.

8. The adjustable filter test device according to claim 1, characterized in that: The mounting feet are SMA or BNC mounting feet.

9. The adjustable filter test device according to claim 1, characterized in that: The guide grooves of the horizontal slide rail and the vertical slide rail respectively pass through the middle positions thereof.

10. The tunable filter testing device according to claim 1, characterized in that: The TOP ground layer is the top layer of the PCB board, the S1 routing layer is the middle layer of the PCB board, the S2 routing layer is the middle layer of the PCB board, and the BOT ground layer is the bottom layer of the PCB board.

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