A PIM test device dedicated for phase shifter testing

Abstract

The utility model belongs to the phase shifter test technical field discloses a PIM testing arrangement special for phase shifter test, including test board, the surface of test board is equipped with the positioning hole of linear array arrangement, positioning module, positioning module includes bearing frame, clamp array group and positioner, bearing frame is the U shape structure of horizontal section and vertical section, and horizontal section and vertical section integral forming set up, clamp array group installs on horizontal section, positioner installs on vertical section, positioner can be detachably installed in positioning hole, the bottom fixed mounting of test board has the fixed frame, the bottom of fixed frame is equipped with fixed hole, and fixed frame passes through fixed hole and external workbench rigid connection is realized by bolt. The utility model discloses the positioning hole of linear array arrangement, the design of adjustable interval's clamp array group of combination and standardization hole distance can realize the quick adaptive installation of different specifications phase shifter, to reduce frock replacement time, and can solve the problem that traditional device adaptability is poor.

Description

Technical Field

[0001] This utility model relates to the field of phase shifter testing technology, and in particular to a PIM testing device specifically for phase shifter testing. Background Technology

[0002] The PIM test device for phase shifters is specifically designed to detect passive intermodulation distortion (PIM) generated by phase shifters under specific operating conditions. PIM is a parasitic signal in high-frequency systems caused by material nonlinearity or poor contact.

[0003] In wireless communication systems, the passive intermodulation (PIM) performance of phase shifters directly affects signal transmission quality. Traditional PIM testing devices have the following problems:

[0004] 1) Poor positioning adaptability: Conventional test benches have a single type of fixing hole, which cannot be compatible with the installation dimensions of phase shifters of different specifications, resulting in frequent tooling changes;

[0005] 2) Signal interference risk: Metal positioning components are prone to causing additional electromagnetic reflections, which can affect the accuracy of PIM testing. Therefore, we propose a dedicated PIM testing device for phase shifter testing. Utility Model Content

[0006] In view of the problems of poor positioning adaptability and signal interference risk of the existing PIM testing device, this utility model is proposed.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A PIM testing device for phase shifter testing includes a test bench with positioning holes arranged in a linear array on the surface of the test bench. The positioning holes are used to fix the cable so that it is not disturbed during vibration testing.

[0009] The positioning module includes a support frame, a fixture array group mounted on the support frame, and a positioner. The support frame is a U-shaped structure with horizontal and vertical sections, and the horizontal and vertical sections are integrally formed. The fixture array group is mounted on the horizontal section, and the positioner is mounted on the vertical section. The positioner is detachably installed in the positioning hole. Through the positioning hole of the linear array and the U-shaped support frame design, multi-dimensional adjustment of the phase shifter installation position is realized. At the same time, the fixture array group and the positioner are arranged in separate areas to reduce the interference of mechanical structure on the test signal, thereby solving the problem of poor adaptability of traditional positioning.

[0010] As a technical solution of the PIM testing device for phase shifter testing described in this utility model, the bottom of the test platform is fixedly installed with a fixing frame, the bottom of the fixing frame is provided with symmetrically arranged fixing holes, and the fixing frame is rigidly connected to the external workbench through the fixing holes by bolts, so as to enhance the overall stability of the testing device, avoid PIM test errors caused by mechanical vibration, and reduce the risk of signal interference.

[0011] As a technical solution of the PIM testing device for phase shifter testing described in this utility model, the linear array spacing of the positioning holes is adapted to the standard mounting hole position of the phase shifter, so as to simplify the tooling adjustment process and improve the testing efficiency.

[0012] As a technical solution of the PIM testing device for phase shifter testing described in this utility model, the fixture array group includes fixtures equidistantly distributed along the horizontal section of the support frame. The horizontal spacing of each fixture combination can correspond to the size of different specifications of phase shifters, so as to facilitate compatibility with different specifications of phase shifters and reduce the frequency of tooling replacement.

[0013] As a technical solution of the PIM testing device for phase shifter testing described in this utility model, the upper section of the positioner is symmetrically provided with limiting plates, and the lower section of the positioner is provided with anti-retraction spikes with anti-retraction protrusions, so as to ensure that the positioner does not shift during the test.

[0014] As a technical solution of the PIM testing device for phase shifter testing described in this utility model, the anti-retraction protrusion of the anti-retraction spike has a barbed structure to avoid additional electromagnetic reflection on the metal contact surface.

[0015] As a technical solution of the PIM testing device for phase shifter testing described in this utility model, the positioner is made of conductive rubber to further suppress electromagnetic wave reflection and improve the accuracy of PIM testing from the material level.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1. This utility model, through the design of linear array positioning holes, combined adjustable spacing fixture array group and standardized hole spacing, can realize the rapid adaptation and installation of phase shifters of different specifications, so as to reduce tooling change time and solve the problem of poor adaptability of traditional devices.

[0018] 2. This utility model, through the synergistic effect of the locator made of conductive rubber, the U-shaped support frame, and the anti-stab structure, can reduce the risk of electromagnetic reflection from both mechanical layout and material properties, thereby playing the role of fixing the radio frequency cable in the slot and significantly improving the reliability of PIM test results. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the separate structure of the test platform and positioning module of this utility model.

[0022] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] In the diagram: 1. Test stand; 101. Positioning hole; 102. Fixture; 103. Fixing hole; 2. Bearing frame; 201. Horizontal section; 202. Vertical section; 3. Fixture; 4. Positioner; 401. Limiting piece; 402. Anti-reverse spike. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0028] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] Reference Figures 1-3 A PIM testing device for phase shifter testing is provided. This PIM testing device for phase shifter testing includes a test bench 1. The surface of the test bench 1 is provided with positioning holes 101 arranged in a linear array. The positioning holes 101 are used to fix the cable so that it is not disturbed during the vibration test.

[0030] The positioning module includes a support frame 2, a fixture array group mounted on the support frame 2, and a positioner 4. The support frame 2 is a U-shaped structure with a horizontal section 201 and a vertical section 202, and the horizontal section 201 and the vertical section 202 are integrally formed. The fixture array group is mounted on the horizontal section 201, and the positioner 4 is mounted on the vertical section 202. The positioner 4 is detachably installed in the positioning hole 101. In application, the positioning hole 101 of the linear array and the U-shaped support frame 2 design realize multi-dimensional adjustment of the phase shifter installation position. At the same time, the fixture array group and the positioner 4 are arranged in separate areas to reduce the interference of mechanical structure on test signals, thereby solving the problem of poor adaptability of traditional positioning.

[0031] Reference Figure 1 and Figure 2 The bottom of the test bench 1 is fixedly installed with a fixing frame 102. The bottom of the fixing frame 102 has symmetrically arranged fixing holes 103. The fixing frame 102 is rigidly connected to the external workbench by bolts through the fixing holes 103. In application, the rigid connection design of the fixing frame 102 and the bolts enhances the overall stability of the test device, avoids PIM test errors caused by mechanical vibration, and reduces the risk of signal interference.

[0032] Reference Figure 2 and Figure 3 The linear array spacing of the positioning holes 101 is adapted to the standard mounting hole position of the phase shifter. In application, the spacing of the positioning holes 101 matches the standard mounting hole position of the phase shifter, which simplifies the tooling adjustment process and improves the testing efficiency.

[0033] Reference Figure 2 and Figure 3The fixture array group includes fixtures 3 that are equidistantly distributed along the horizontal section 201 of the support frame 2. The horizontal spacing of each fixture 3 combination can correspond to the size of different specifications of phase shifters. In application, the adjustable spacing fixture array group design is compatible with different specifications of phase shifters and reduces the frequency of tooling changes.

[0034] Reference Figure 2 and Figure 3 The upper section of the positioner 4 is symmetrically provided with limiting plates 401, and the lower section of the positioner 4 is provided with anti-retraction protrusions 402. The anti-retraction protrusions of the anti-retraction protrusions 402 have a barb-shaped structure. In application, the limiting plates 401 and the barb-shaped anti-retraction protrusions 402 structure ensure that the positioner 4 does not shift during the test, while avoiding additional electromagnetic reflection from the metal contact surface.

[0035] Reference Figure 2 and Figure 3 The positioner 4 is made of conductive rubber. In application, the conductive rubber positioner 4 can further suppress electromagnetic wave reflection and improve the accuracy of PIM testing from the material level.

[0036] The working principle of this utility model is as follows: Device installation: First, the test table 1 is bolted to the work table via the fixing frame 102, and the table surface is calibrated using an external level. Then, according to the size of the phase shifter, it is fixed in the corresponding fixture 3.

[0037] Phase shifter positioning: First, insert the positioner 4 into the positioning hole 101 of the test bench 1 until the limiting piece 401 is stuck on the bench surface. Then, place the phase shifter between the clamps 3 and press it lightly until it engages, ensuring that the outer shell is in close contact with the conductive rubber positioner 4.

[0038] PIM Test Execution: First, connect the vector network analyzer to the phase shifter port and set the test frequency band (e.g., 1.7-2.2GHz). Then, apply a 43dBm dual-carrier signal and record the third-order intermodulation product (e.g., below -110dBc is acceptable). Finally, observe whether the positioner 4 is loose during the test; the anti-reverse barb 402 barb structure should not have any displacement.

[0039] Disassembly and switching: Vertically pull out the positioner 4, the barb structure retracts and disengages from the positioning hole 101, then remove the phase shifter on the clamp 3, and replace it with the next specification phase shifter. Repeat the above phase shifter positioning and PIM test.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A PIM testing device specifically for phase shifter testing, characterized in that: include: The test bench (1) has positioning holes (101) arranged in a linear array on its surface. The positioning holes (101) are used to fix the cable so that it is not disturbed during the vibration test. The positioning module includes a support frame (2), a clamp array group installed on the support frame (2), and a locator (4). The support frame (2) is a U-shaped structure with a horizontal section (201) and a vertical section (202), and the horizontal section (201) and the vertical section (202) are integrally formed. The clamp array group is installed on the horizontal section (201), and the locator (4) is installed on the vertical section (202). The locator (4) is detachably installed in the positioning hole (101).

2. The PIM testing device for phase shifter testing according to claim 1, characterized in that: The bottom of the test bench (1) is fixedly installed with a fixing frame (102). The bottom of the fixing frame (102) is provided with symmetrically arranged fixing holes (103), and the fixing frame (102) is rigidly connected to the external workbench by bolts through the fixing holes (103).

3. The PIM testing device for phase shifter testing according to claim 1, characterized in that: The linear array spacing of the positioning holes (101) is adapted to the position of the standard mounting holes of the phase shifter.

4. The PIM testing device for phase shifter testing according to claim 1, characterized in that: The clamp array group includes clamps (3) that are equidistantly distributed along the horizontal section (201) of the support frame (2), and the horizontal spacing of each clamp (3) combination can correspond to the size of different specifications of phase shifters.

5. The PIM testing device for phase shifter testing according to claim 1, characterized in that: The upper section of the locator (4) is symmetrically provided with limiting pieces (401), and the lower section of the locator (4) is provided with anti-retraction spikes (402) with anti-retraction protrusions.

6. The PIM testing device for phase shifter testing according to claim 5, characterized in that: The anti-retraction protrusion of the anti-retraction spike (402) has a barbed structure.

7. The PIM testing apparatus for phase shifter testing according to any one of claims 1-6, characterized in that: The locator (4) is made of conductive rubber.

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