Microwave device test fixture

Abstract

The utility model discloses a microwave device test fixture. The microwave device test fixture comprises a base (1), a fixed end module (2), a sliding end module (3), a limiting end module (4) and a sliding rod (5), the fixed end module (2) and the limiting end module (4) are fixed on the base, the sliding rod (5) is arranged between the fixed end module (2) and the limiting end module (4), and the sliding end module (3) slides on the sliding rod (5) to adjust the distance between the sliding end module (3) and the fixed end module (2); the fixed end module (2) comprises a first external top plate (23) and a first convex edge (262) which are used for clamping a microstrip line circuit board, and the sliding end module (3) comprises a second external top plate (33) and a second convex edge (362) which are used for clamping the microstrip line circuit board. The microwave device test clamp is suitable for microstrip line circuit boards of various sizes.

Description

TECHNICAL FIELD

[0001] The utility model relates to radio frequency circuit technical field especially relates to a microwave device test fixture. BACKGROUND

[0002] With the development of microwave communication technology, more and more miniaturized planar microstrip structure circuits are used. The port products of this microstrip structure can be tested by probes, or can be tested by connecting the port with a test board or welding communication through a key wire. However, for products such as ceramic insulators with microstrip input and output structures and similar passive devices such as filters, which have relatively large volumes, probe batch testing cannot be used, and testing by connecting the port with a test board or welding communication through a key wire will damage the appearance integrity of the product and affect subsequent use.

[0003] The main reason why the microstrip structure port is difficult to test is that the microstrip line is composed of a planar transmission line and a ground plane. When testing the transmission line, a ground plane must be formed to form a transmission loop, and the microstrip transmission structure is complete. Therefore, in the prior art, a test device using a coaxial connector in cooperation with a test clamp plate is used. The coaxial connector is a prior art, which is a widely used small-sized threaded coaxial connector. It has the characteristics of wide frequency band, excellent performance, high reliability, and long service life. It is suitable for connecting RF cables or microstrip lines in the RF loop of microwave equipment and digital communication systems. This test fixture must ensure that the microstrip port is in good contact with the needle of the coaxial connector. When the signal is transmitted horizontally through the test needle, the clamping panel with the coaxial connector must be in close contact with the side surface of the base to minimize the distance between the microstrip port of the tested piece and the clamping panel, i.e. to reduce the gap without a ground loop for the transmitted signal, so that the microwave parameters can be truly tested. This is also the difficulty in testing microwave products with microstrip ports.

[0004] However, the test fixture of the prior art has two obvious defects. First, the lower pressing device needs to be manually pressed to fix the measured circuit, and the pressing force cannot be accurately controlled, which may cause damage to the measured piece. Second, the test fixture and the external RF coaxial connection part are horizontally embedded in the metal structure, which is easy to damage during use and difficult to disassemble, repair and assemble. The interconnection and assembly of the fixture and the PCB are achieved by welding, which is not conducive to repeated use. The existing test fixture is not flexible enough and can only move in the X direction, making it difficult to achieve universality and unable to meet the testing needs of different X, Y and Z sizes of the measured PCB. UTILITY MODEL CONTENTS

[0005] The utility model discloses want to reach the technical purpose at to provide a kind of microwave device test fixture, the microwave device test fixture can solve the defect existing in prior art scheme, solve the problem that the fixture and microstrip circuit board interconnection radio frequency parasitic in prior scheme are big, working frequency is low, cannot satisfy the test demand of different X / Y / Z size measured microstrip circuit board, with the advantages of applicable different size and thickness microstrip circuit board, easy to install, test accuracy is high, without welding can be realized in DC to millimeter wave range with good performance.

[0006] According to the above technical purpose, the utility model provides a kind of microwave device test fixture, the microwave device test fixture includes base 1, fixed end module 2, sliding end module 3, limit end module 4 and sliding rod 5;The fixed end module 2 and limit end module 4 are fixed on the base, and the sliding rod 5 is arranged between the fixed end module 2 and limit end module 4, and the sliding end module 3 slides on the sliding rod 5 to adjust the distance between the sliding end module 3 relative to the fixed end module 2;

[0007] The fixed end module 2 includes: first radio frequency coaxial connector 21, first internal top plate 22, first external top plate 23, first lower pressing handle 24, first pressing column 25, first upper end platform 26 and first compression spring 27;The first radio frequency coaxial connector 21 is installed on the first upper end platform 26, and the first upper end platform 26 is also provided with first convex edge 262, and the upper edge of the first external top plate 23 is in abutment with the first convex edge 262;The first internal top plate 22 is fixedly connected with the first external top plate 23, the pressing column 25 is inserted into the through hole on the first internal top plate 22, and the first pressing column 25 is externally sleeved with the first compression spring 27, and the upper end of the first pressing column 25 is in abutment with the first lower pressing handle 24;

[0008] The sliding end module 3 includes: second radio frequency coaxial connector 31, second internal top plate 32, second external top plate 33, second lower pressing handle 34, second pressing column 35, second upper end platform 36 and second compression spring 37;The second radio frequency coaxial connector 31 is installed on the second upper end platform 36, and the second upper end platform 36 is also provided with second convex edge 362, and the upper edge of the second external top plate 33 is in abutment with the second convex edge 362;The second internal top plate 32 is fixedly connected with the second external top plate 33, the pressing column 35 is inserted into the through hole on the second internal top plate 32, and the second pressing column 35 is externally sleeved with the second compression spring 37, and the upper end of the second pressing column 35 is in abutment with the second lower pressing handle 34.

[0009] In one embodiment, the first upper end platform 26 is provided with a first upper end platform first notch 261, and the first radio frequency coaxial connector 21 is installed in the first upper end platform first notch 261.

[0010] In one embodiment, the second upper end platform 36 is provided with a second upper end platform second notch 361, and the second radio frequency coaxial connector 31 is installed in the second upper end platform second notch 361.

[0011] In one embodiment, when the first lower pressing handle 24 is pressed, the first pressing column 25 moves downward and drives the first inner top plate 22 and the first outer top plate 23 to move downward at the same time, and the upper edge of the first outer top plate 23 is away from the first convex edge 262.

[0012] In one embodiment, when the second lower pressing handle 34 is pressed, the second pressing column 35 moves downward and drives the second inner top plate 32 and the second outer top plate 33 to move downward at the same time, and the upper edge of the second outer top plate 33 is away from the second convex edge 362.

[0013] In one embodiment, the upper edge of the first outer top plate 23 is further provided with a first outer top plate first notch 231, and the first outer top plate first notch 231 corresponds to the connection probe position of the first radio frequency coaxial connector 21.

[0014] In one embodiment, the upper edge of the second outer top plate 33 is further provided with a second outer top plate second notch 331, and the second outer top plate second notch 331 corresponds to the connection probe position of the second radio frequency coaxial connector 31.

[0015] In one embodiment, the sliding block 28 is arranged in a groove below the fixed end module 2 and can change position by sliding along the groove.

[0016] In one embodiment, the through hole 38 is arranged at the bottom of the sliding end module 3, and the sliding rod 5 passes through the through hole 38.

[0017] In one embodiment, the sliding end module 3 and the limiting end module 4 are both provided with fixing screws.

[0018] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present application and constitute a part of the specification, which together with the embodiments of the present application serve to explain the present application, and do not constitute a limitation to the present application. In the drawings:

[0020] Figure 1 is a perspective view of the microwave device test fixture structure of the present application;

[0021] Figure 2 is a top view of the microwave device test fixture structure of the present application;

[0022] Figure 3 is a perspective view of the microwave device test fixture fixed end module of the present application;

[0023] Figure 4 is a sectional view of the microwave device test fixture fixed end module of the present application;

[0024] Figure 5 is an exploded view of the microwave device test fixture fixed end module of the present application;

[0025] Figure 6 is a perspective view of the microwave device test fixture sliding end module of the present application;

[0026] Figure 7 is a side view of the microwave device test fixture sliding end module of the present application;

[0027] Figure 8 is a bottom view of the microwave device test fixture base of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings.

[0029] As shown in Figures 1-2 the microwave device test fixture of the present application comprises a base 1, a fixed end module 2, a sliding end module 3, a limiting end module 4 and a sliding rod 5. The fixed end module 2 and the limiting end module 4 are fixed on the base, and the sliding rod 5 is arranged between the fixed end module 2 and the limiting end module 4. The sliding end module 3 slides on the sliding rod 5 to adjust the distance between the sliding end module 3 and the fixed end module 2.

[0030] As shown in Figures 3-5As shown, the fixed end module 2 of the microwave device test fixture comprises: a first radio frequency coaxial connector 21, a first internal top plate 22, a first external top plate 23, a first lower pressing handle 24, a first pressing column 25, a first upper end platform 26, a first compression spring 27 and a sliding block 28. Wherein, the first radio frequency coaxial connector 21 is installed at the first upper end platform first gap 261 of the first upper end platform 26, and the first upper end platform 26 is also provided with a first convex edge 262, and the upper edge of the first external top plate 23 is in abutment with the first convex edge 262. The first internal top plate 22 is fixedly connected with the first external top plate 23, the pressing column 25 is inserted into the through hole on the first internal top plate 22, and the first pressing column 25 is externally sleeved with the first compression spring 27, the upper end of the first pressing column 25 is in abutment with the first lower pressing handle 24, when the first lower pressing handle 24 is pressed down, the first pressing column 25 moves downward and drives the first internal top plate 22 and the first external top plate 23 to move downward at the same time, and the upper edge of the first external top plate 23 is away from the first convex edge 262, at this time, the space between the upper edge of the first external top plate 23 and the first convex edge 262 is used for clamping the microstrip circuit board.

[0031] Further, the upper edge of the first external top plate 23 also has a first external top plate first gap 231, the first external top plate first gap 231 corresponds to the connection probe position of the first radio frequency coaxial connector 21, the first external top plate first gap 231 and the gap of the first radio frequency coaxial connector 21 form a space around the connection probe of the first radio frequency coaxial connector 21, thereby forming an air medium around the connection probe, thereby improving the working frequency of the microwave device test fixture.

[0032] The sliding block 28 is arranged in the groove below the fixed end module 2 and can slide along the groove to change the position. Thus, the first radio frequency coaxial connector 21 can change the contact position in the extension direction of the groove to adapt to the microstrip circuit board of different connection positions. Meanwhile, the sliding block 28 is provided with a plug hole for inserting the sliding rod 5.

[0033] As Figures 6-7As shown, the sliding end module 3 of the microwave device test fixture comprises a second radio frequency coaxial connector 31, a second inner top plate 32, a second outer top plate 33, a second lower pressing handle 34, a second pressing column 35, a second upper end platform 36, a second compression spring 37 and a through hole 38. The second radio frequency coaxial connector 31 is installed at the second upper end platform second gap 361 of the second upper end platform 36, and the second upper end platform 36 is also provided with a second convex edge 362, and the upper edge of the second outer top plate 33 abuts against the second convex edge 362. The second inner top plate 32 is fixedly connected with the second outer top plate 33, the pressing column 35 is inserted into the through hole on the second inner top plate 32, the second pressing column 35 is externally sleeved with the second compression spring 37, the upper end of the second pressing column 35 abuts against the second lower pressing handle 34, when the second lower pressing handle 34 is pressed down, the second pressing column 35 moves downward and drives the second inner top plate 32 and the second outer top plate 33 to move downward at the same time, and the upper edge of the second outer top plate 33 is away from the second convex edge 362, at this time, the space between the upper edge of the second outer top plate 33 and the second convex edge 362 is used for clamping the microstrip circuit board.

[0034] The upper edge of the second outer top plate 33 also has a second outer top plate second gap 331, and the second outer top plate second gap 331 corresponds to the position of the connecting probe of the second radio frequency coaxial connector 31. The second gap 331 and the gap of the second radio frequency coaxial connector 31 form a space around the connecting probe of the second radio frequency coaxial connector 31, thereby forming an air medium around the connecting probe, thereby improving the working frequency of the microwave device test fixture.

[0035] Further, the through hole 38 is arranged at the bottom of the sliding end module 3, and the sliding rod 5 passes through the through hole 38.

[0036] The limiting end module 4 is provided with a plug hole for inserting the sliding rod 5.

[0037] The sliding end module 3 and the limiting end module 4 are both provided with fixing screws, when the fixing screws are tightened, the sliding end module 3 and the limiting end module 4 cannot slide on the sliding rod 5.

[0038] Further, as shown in FIG. 6, the sliding end module 3 is provided with a second limiting end module 4, and the second limiting end module 4 is arranged at the end of the sliding rod 5. Figure 8As shown in the microwave device test fixture's base 1 includes long oval fixed groove 11 and fixed hole 12, the long oval fixed groove 11 is used to be fixed by fixing screw the limit end module 4, so that the limit end module 4 can change position in the extension direction perpendicular to the sliding rod 5.And simultaneously drive the sliding end module 3, sliding rod 5 and the fixed end module 2 The slider 28 together change position in the extension direction perpendicular to the sliding rod 5.The fixed hole 12 is used to be fixed by fixing screw the fixed end module 2.

[0039] The above-mentioned is only the embodiment of the utility model, and does not limit the protection scope of the utility model, and any equivalent transformation, direct or indirect application in related technical field using the utility model is also included in the protection scope of the utility model.

Claims

1. A microwave device test fixture, characterized by: The microwave device test fixture comprises a base (1), a fixed end module (2), a sliding end module (3), a limiting end module (4) and a sliding rod (5); the fixed end module (2) and the limiting end module (4) are fixed on the base, and the sliding rod (5) is arranged between the fixed end module (2) and the limiting end module (4); the sliding end module (3) slides on the sliding rod (5) to adjust the distance between the sliding end module (3) and the fixed end module (2); The fixed end module (2) comprises a first radio frequency coaxial connector (21), a first inner top plate (22), a first outer top plate (23), a first lower pressing handle (24), a first pressing column (25), a first upper end platform (26) and a first compression spring (27); the first radio frequency coaxial connector (21) is mounted on the first upper end platform (26), the first upper end platform (26) is further provided with a first convex edge (262), and the upper edge of the first outer top plate (23) abuts against the first convex edge (262); the first inner top plate (22) is fixedly connected with the first outer top plate (23), the first pressing column (25) is inserted into a through hole on the first inner top plate (22), and the first pressing column (25) is externally sleeved with the first compression spring (27), and the upper end of the first pressing column (25) abuts against the first lower pressing handle (24). The sliding end module (3) comprises a second radio frequency coaxial connector (31), a second inner top plate (32), a second outer top plate (33), a second lower pressing handle (34), a second pressing column (35), a second upper end platform (36) and a second compression spring (37); the second radio frequency coaxial connector (31) is mounted on the second upper end platform (36), the second upper end platform (36) is further provided with a second convex edge (362), and the upper edge of the second outer top plate (33) abuts against the second convex edge (362); the second inner top plate (32) is fixedly connected with the second outer top plate (33), the pressing column (35) is inserted into a through hole on the second inner top plate (32), and the second pressing column (35) is externally sleeved with the second compression spring (37), and the upper end of the second pressing column (35) abuts against the second lower pressing handle (34).

2. The microwave device test fixture of claim 1, wherein, The first upper end platform (26) is provided with a first upper end platform first notch (261), and the first radio frequency coaxial connector (21) is mounted in the first upper end platform first notch (261).

3. The microwave device test fixture of claim 1, wherein, The second upper end platform (36) is provided with a second upper end platform second notch (361), and the second radio frequency coaxial connector (31) is mounted in the second upper end platform second notch (361).

4. The microwave device test fixture of claim 1, wherein, When the first lower pressing handle (24) is pressed downward, the first pressing column (25) moves downward and drives the first inner top plate (22) and the first outer top plate (23) to move downward at the same time, and the upper edge of the first outer top plate (23) is away from the first convex edge (262).

5. The microwave device test fixture of claim 1, wherein, When the second lower pressing handle (34) is pressed, the second pressing column (35) moves downward and drives the second inner top plate (32) to move downward at the same time with the second outer top plate (33), and the upper edge of the second outer top plate (33) is away from the second convex edge (362).

6. The microwave device test fixture of claim 1, wherein, The upper edge of the first outer top plate (23) further has a first outer top plate first notch (231) corresponding to the position of the connecting probe of the first radio frequency coaxial connector (21).

7. The microwave device test fixture of claim 1, wherein, The upper edge of the second outer top plate (33) further has a second outer top plate second notch (331) corresponding to the position of the connecting probe of the second radio frequency coaxial connector (31).

8. The microwave device test fixture of claim 1, wherein, The slider (28) is arranged in a groove below the fixed end module (2) and can change position by sliding along the groove.

9. The microwave device test fixture of claim 1, wherein, The through hole (38) is arranged at the bottom of the sliding end module (3), and the sliding rod (5) passes through the through hole (38).

10. The microwave device test fixture of claim 1, wherein, The sliding end module (3) and the limiting end module (4) are both provided with fixing screws.

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