Differential cable test clamp

Abstract

The invention relates to a differential cable test clamp which comprises a radio frequency adapter, a replaceable adapter, a clamp base, a quick manual screw and a pressing block. The radio frequency adapter is connected with the replaceable adapter, the replaceable adapter is connected to one end of the clamp base, the high-speed differential copper cable is arranged on the clamp base, the high-speed differential copper cable and the pressing block are pressed tightly through the quick manual screw, and one end of the high-speed differential copper cable is connected with the replaceable adapter. The radio frequency adapter comprises a coaxial connector and a coaxial to parallel line cavity; the coaxial connector is connected to one side of the coaxial to parallel line cavity, and the other side of the coaxial to parallel line cavity is connected with the replaceable adapter. The replaceable adapter comprises a contact main body, a parallel line medium and a double-end spring needle; the invention aims to provide the differential cable test fixture for overcoming the existing defects, and solves the test problem of an ultra-high-speed 224Gbps high-speed cable.

Description

Technical Field

[0001] The invention relates to a differential cable testing fixture. Background Art

[0002] High-speed copper cables are a more economical option than optical communications for interconnecting large-scale AI server clusters and GPUs. NVIDIA's adoption of high-speed copper cables in its NV Link high-speed interconnect technology has triggered explosive growth in this traditional technology. A compound annual growth rate of up to 45% is projected. As a traditional manufacturing nation, China boasts a comprehensive industrial base and ample technological expertise. In this booming industry, China is poised to capture 50% of the global market share. Even its current overseas OEM business alone is poised for 100% growth. Once the AI ​​industry matures, the market size is projected to double or triple.

[0003] Therefore, high-speed copper cables require a technological upgrade, from traditional 10Gbps and 40Gbps to 112Gbps and 224Gbps. Conventional manufacturing equipment and testing devices no longer meet these requirements, necessitating a large-scale technological upgrade.

[0004] Existing testing equipment for ultra-high-speed 224Gbps (gigabits per second) cables suffers from low test accuracy, poor performance, poor adaptability, and frequency inability to meet requirements. Therefore, a differential cable test fixture is proposed to address the above issues. Summary of the Invention

[0005] The present invention aims to overcome the existing defects and provide a differential cable test fixture, which solves the problem of testing ultra-high-speed 224Gbps high-speed cables.

[0006] The technical solution to achieve the above object is: a differential cable test fixture, including a radio frequency adapter, a replaceable adapter, a fixture base, a quick manual screw and a pressure block; The RF adapter is connected to the replaceable adapter, the replaceable adapter is connected to one end of the fixture base, a high-speed differential copper cable is set on the fixture base, the high-speed differential copper cable is compressed by the quick manual screw and the pressure block, and one end of the high-speed differential copper cable is connected to the replaceable adapter.

[0007] Preferably, the radio frequency adapter includes a coaxial connector and a coaxial to parallel line cavity; the coaxial connector is connected to one side of the coaxial to parallel line cavity, and the other side of the coaxial to parallel line cavity is connected to the replaceable adapter.

[0008] Preferably, the replaceable adapter includes a contact head body, a parallel line medium and a double-ended spring needle; the parallel line medium is connected to the hole of the contact head body, the double-ended spring needle is connected to the parallel line medium, the left end of the double-ended spring needle is connected to the coaxial to parallel line cavity, and the right end is connected to the high-speed differential copper cable.

[0009] Preferably, a contact bevel is provided on one end of the contact head body close to the high-speed differential copper cable, and the high-speed differential copper cable passes through the contact bevel and is connected to the right end of the double-ended spring pin.

[0010] Preferably, a sunken platform is provided at the left end of the upper end surface of the clamp base, two limiting seats are connected to the bottom surface of the sunken platform on both sides by fixing screws, and the contact head body is located between the two limiting seats.

[0011] Preferably, a groove is provided on the fixture base, and the high-speed differential copper cable is located in the groove.

[0012] Preferably, the coaxial connector and the coaxial-to-parallel-line cavity are connected by a plurality of first fastening screws.

[0013] Preferably, the coaxial-to-parallel-line cavity is connected to the fixture base and the two side walls of the limit seat through a plurality of second fastening screws.

[0014] The beneficial effects of the present invention are as follows: the differential cable test fixture is connected to a replaceable adapter by setting an RF adapter, the replaceable adapter is connected to one end of the fixture base, a high-speed differential copper cable is set on the fixture base, the high-speed differential copper cable is tightened by a quick manual screw and a pressure block, and one end of the high-speed differential copper cable is connected to the replaceable adapter; it can realize the test of ultra-high-speed 224Gbps high-speed cables, and has high test accuracy and strong adaptability, meeting high-frequency testing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a top view of the overall connection of the differential cable test fixture of the present invention; Figure 2 This is an overall connection isometric diagram of the differential cable test fixture of the present invention; Figure 3 is an exploded view of the differential cable test fixture of the present invention; Figure 4 This is a detailed diagram of the radio frequency adapter of the present invention; Figure 5 is a detailed view of the replaceable adapter of the present invention; Figure 6 It is a connection cross-sectional view of the double-ended spring needle of the present invention.

[0016] In the figure: 1. First fastening screw; 2. Coaxial connector; 3. Coaxial to parallel line cavity; 4. Double-ended spring pin; 5. Interchangeable adapter; 6. Clamp base; 7. Fixing screw; 8. Quick manual screw; 9. Pressure block; 10. High-speed differential copper cable; 11. Contact head body; 12. Parallel line medium; 13. Contact bevel; 14. RF adapter; 15. Sink; 16. Limit seat; 17. Groove; 18. Second fastening screw. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1-6 As shown, a differential cable test fixture includes an RF adapter 14, a replaceable adapter 5, a fixture base 6, a quick manual screw 8 and a pressure block 9; the RF adapter 14 is connected to the replaceable adapter 5, the replaceable adapter 5 is connected to one end of the fixture base 6, a high-speed differential copper cable 10 is set on the fixture base 6, the high-speed differential copper cable 10 is compressed by the quick manual screw 8 and the pressure block 9, and one end of the high-speed differential copper cable 10 is connected to the replaceable adapter 5.

[0020] like Figure 4 As shown, the RF adapter 14 includes a coaxial connector 2 and a coaxial-to-parallel-line cavity 3. The coaxial connector 2 is connected to one side of the coaxial-to-parallel-line cavity 3 and is connected to the coaxial connector 2 and the coaxial-to-parallel-line cavity 3 via multiple first fastening screws 1. The other side of the coaxial-to-parallel-line cavity 3 is connected to a replaceable adapter 5. The coaxial-to-parallel-line cavity 3 is connected to the fixture base 6 and the side walls of the two limit seats 16 via multiple second fastening screws 18.

[0021] like Figure 5 、 6As shown, the replaceable adapter 5 includes a contact body 11, a parallel line dielectric 12, and a double-ended pogo pin 4. The parallel line dielectric 12 is connected to the hole of the contact body 11, and the double-ended pogo pin 4 is connected to the parallel line dielectric 12. The left end of the double-ended pogo pin 4 is connected to the coaxial-to-parallel line cavity 3, and the right end is connected to the high-speed differential copper cable 10. A contact bevel 13 is provided on the end of the contact body 11 near the high-speed differential copper cable 10. The high-speed differential copper cable 10 passes through the contact bevel 13 and connects to the right end of the double-ended pogo pin 4.

[0022] Specifically, a recessed platform 15 is formed on the left end of the upper end surface of the fixture base 6. Two stoppers 16 are connected to the bottom of the recessed platform 15 via fixing screws 7. The contact head body 11 is located between the two stoppers 16. A groove 17 is formed on the fixture base 6, and the high-speed differential copper cable 10 is located in the groove 17.

[0023] Specifically, the coaxial connector 2 is secured to the coaxial-to-parallel-line cavity 3 using multiple first fastening screws 1, forming a component RF adapter 14. The coaxial-to-parallel-line cavity 3 converts single-port coaxial RF transmission to high-speed differential transmission through microwave matching. The RF adapter 14 is connected to the replaceable contact head 5 via second fastening screws 18. The replaceable contact head 5 comprises a contact head body 11, a parallel-line dielectric 12, and a double-ended spring pin 4. The contact head body 11 is provided with a contact bevel 13 for adaptive contact with the wrapped outer conductor of the high-speed differential copper cable 10, addressing cable manufacturing tolerances and matching issues between manufacturers' specifications. The high-speed differential copper cable 10 is stripped according to the fixture requirements and inserted into the contact head body 11. The pressure block 9 is then pressed against the fixture base 6 using a quick manual screw 8 for quick fixation. The high-speed differential copper cable 10 under test is secured at both ends to different fixtures, forming an electromagnetic transmission loop. The high-speed differential copper cable 10 can then be connected to a network analyzer (VNA) through the ports on both ends of the fixture to test all electrical performance parameters of the high-speed differential.

[0024] This differential cable test fixture is connected to the replaceable adapter 5 by setting an RF adapter 14. The replaceable adapter 5 is connected to one end of the fixture base 6. A high-speed differential copper cable 10 is set on the fixture base 6. The high-speed differential copper cable 10 is tightened by a quick manual screw 8 and a pressure block 9. One end of the high-speed differential copper cable 10 is connected to the replaceable adapter 5. It can realize the testing of ultra-high-speed 224Gbps high-speed cables with high test accuracy and strong adaptability, meeting high-frequency testing requirements.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A differential cable test fixture, characterized in that: It includes a radio frequency adapter (14), a replaceable adapter (5), a fixture base (6), a quick manual screw (8) and a pressure block (9); The radio frequency adapter (14) is connected to the replaceable adapter (5), and the replaceable adapter (5) is connected to one end of the fixture base (6). A high-speed differential copper cable (10) is arranged on the fixture base (6), and the high-speed differential copper cable (10) is pressed by the fast manual screw (8) and the pressure block (9), and one end of the high-speed differential copper cable (10) is connected to the replaceable adapter (5).

2. The differential cable test fixture according to claim 1, wherein: The radio frequency adapter (14) comprises a coaxial connector (2) and a coaxial-to-parallel-line cavity (3); the coaxial connector (2) is connected to one side of the coaxial-to-parallel-line cavity (3), and the other side of the coaxial-to-parallel-line cavity (3) is connected to the replaceable adapter (5).

3. The differential cable test fixture according to claim 2, wherein: The replaceable adapter (5) comprises a contact head body (11), a parallel line medium (12) and a double-headed spring needle (4); the parallel line medium (12) is connected in a hole of the contact head body (11), the double-headed spring needle (4) is connected in the parallel line medium (12), the left end of the double-headed spring needle (4) is connected to the coaxial to parallel line cavity (3), and the right end is connected to the high-speed differential copper cable (10).

4. The differential cable test fixture according to claim 3, wherein: A contact bevel (13) is provided at one end of the contact head body (11) close to the high-speed differential copper cable (10), and the high-speed differential copper cable (10) passes through the contact bevel (13) and is connected to the right end of the double-headed spring pin (4).

5. The differential cable test fixture according to claim 3, wherein: A sinking platform (15) is provided at the left end of the upper end surface of the clamp base (6), and two limit seats (16) are connected to the bottom surface of the sinking platform (15) on both sides via fixing screws (7), and the contact head body (11) is located between the two limit seats (16).

6. The differential cable test fixture according to claim 3, wherein: A groove (17) is provided on the fixture base (6), and the high-speed differential copper cable (10) is located in the groove (17).

7. The differential cable test fixture according to claim 2, wherein: The coaxial connector (2) and the coaxial-to-parallel-line cavity (3) are connected via a plurality of first fastening screws (1).

8. The differential cable test fixture according to claim 5, wherein: The coaxial-to-parallel-line cavity (3) is connected to the clamp base (6) and the two side walls of the limiting seat (16) via a plurality of second fastening screws (18).

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