High-speed cable and high-speed cable assembly

Abstract

The invention discloses a high-speed cable and a high-speed cable assembly, and relates to the technical field of cables, the high-speed cable comprises two signal lines arranged side by side along a first direction, the outer walls of the two signal lines are sequentially coated with a foamed polytetrafluoroethylene layer, an aluminum foil layer and a plastic layer, and two flat ground wires are arranged between the aluminum foil layer and the plastic layer. The two flat ground wires are distributed in a layered mode in the second direction, and the flat ground wires abut against the aluminum foil layer or are bonded with the aluminum foil layer through a conductive adhesive; wherein the first direction is perpendicular to the second direction, the heights of the two signal lines in the second direction are located between the heights of the two flat ground wires in the second direction, the projection length of the two signal lines in the first direction is larger than the projection length of the flat ground wires in the first direction, and the two ends of the plastic layer in the second direction are arranged in a plane mode. According to the invention, the technical problem of poor grounding contact of the high-speed cable is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a high-speed cable and a high-speed cable assembly. BACKGROUND

[0002] The high-speed cable is a special cable specially designed for high-frequency and high-speed data transmission, and its core function is to stably transmit high-frequency electrical signals between electronic devices such as servers, switches, storage devices, graphics cards, and displays. The high-speed cable is not only a physical connection channel, but also a key carrier to ensure signal integrity. With the data transmission rate of servers entering the Gen5 (56Gbps PCIe 5.0) era, the performance requirements of high-speed cables in backplane interconnection have significantly increased.

[0003] In the prior art, most high-speed cables have a round ground wire structure on both sides. However, due to the composition structure of the high-speed cable, when the wire of the high-speed cable is welded with the gold finger of the solder plate, a point or line contact is formed, and the molten solder cannot completely fill the gap between the round ground wire and the gold finger, resulting in bubbles or voids, which in turn increases the ground resistance and increases the impedance of the high-frequency return path, thereby affecting the signal transmission performance of the high-speed cable. SUMMARY

[0004] The purpose of the present application is to provide a high-speed cable and a high-speed cable assembly, which solves the technical problem of poor grounding contact of the high-speed cable.

[0005] To achieve this purpose, the present application adopts the following technical solutions: According to a first aspect, the present application provides a high-speed cable, comprising two signal lines arranged side by side along a first direction, the outer walls of the two signal lines being covered with a foamed polytetrafluoroethylene layer, an aluminum foil layer and a plastic layer in sequence, two flat ground wires being provided between the aluminum foil layer and the plastic layer, the two flat ground wires being distributed in layers along a second direction, and the flat ground wires being in abutment with the aluminum foil layer or being bonded by conductive adhesive; wherein the first direction and the second direction are perpendicular to each other, the height of the two signal lines along the second direction is located between the height of the two flat ground wires along the second direction, the projection length of the two signal lines in the first direction is greater than the projection length of the flat ground wires in the first direction, and the two ends of the plastic layer along the second direction are both flat.

[0006] Optionally, the foamed polytetrafluoroethylene layer is embedded with an elastic support, the elastic support oppositely has a first plane and a first arc surface, and the elastic support is provided with an arc chamfer connected with the first plane; The elastic support is further provided with two second planes parallel to each other and located between the first plane and the first arc surface, and the height of the first plane along the second direction is higher than the height of the first arc surface along the second direction.

[0007] Optionally, a first channel is arranged in the elastic support for facilitating the flow of the cooling liquid and along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other. The first channel is located between the two signal lines and adjacent to the first arc surface, and the cross section of the first channel is circular, and the radius of the first channel is smaller than the radius of the signal line.

[0008] Optionally, a second channel and a first communication hole are arranged in the elastic support, the second channel is used for condensing and recycling the cooling liquid evaporated in the first channel, the second channel is arranged along the third direction and is layered with the first channel, and the height of the second channel along the second direction is higher than the height of the first channel along the second direction. The first communication hole penetrates the first channel and the second channel respectively, the cross section of the second channel is circular, and the inner diameter of the second channel is larger than the inner diameter of the first channel.

[0009] Optionally, the first communication hole is a tapered hole, the direction from the second channel to the first channel is perpendicular to the first direction, and the inner diameter of the first communication hole gradually decreases along the direction from the second channel to the first channel.

[0010] Optionally, the number of the first channel and the first communication hole is two, the two first channels and the second channel are triangularly distributed, and a second communication hole is arranged between the two first channels. A third communication hole is arranged in the elastic support for returning the cooling liquid in the second channel to the first channel, and the third communication hole penetrates the second communication hole.

[0011] Optionally, a condensing plate arranged along the third direction is fixedly installed in the second channel, and the condensing plate is provided with a third plane and a second arc surface. The third plane is opposite to the first communication hole, and the second arc surface is in contact with the inner wall of the second channel.

[0012] Optionally, a plurality of condensing holes are arranged in the condensing plate along the first direction, the condensing holes penetrate the third plane and the second arc surface respectively, and the height of the plurality of condensing holes along the second direction is low at both sides and high in the middle.

[0013] Optionally, the signal line comprises a conductor and an insulating layer covering the conductor, the conductor is arranged in a circular shape, and the insulating layer is arranged in a circular ring shape; the two flat ground wires have the same width in the first direction.

[0014] According to a second aspect, the application provides a high-speed cable assembly comprising the high-speed cable according to the first aspect and a printed circuit board.

[0015] Compared with the prior art, the application has the following beneficial effects: The high-speed cable and the high-speed cable assembly provided by the application make full use of the space of the cable cross section by arranging the flat ground wire between the aluminum foil layer and the plastic layer, without occupying too much radial size, which helps to realize the miniaturization and light weight of the cable and meet the application requirements of high-density connection. The aluminum foil layer acts as a shielding layer, effectively isolating external electromagnetic interference and making good contact with the flat ground wire, thereby reducing noise interference during signal transmission and improving the reliability of signal transmission. Since the projection length of the signal line is greater than the projection length of the flat ground wire, the current return path of the signal line during transmission is more ideal, effectively reducing the impedance of the high-frequency return path and ensuring the stable transmission of high-frequency signals. The flat ground wire and the flat setting of the two ends of the plastic layer facilitate the wiring and installation of the cable, the weld joint between the flat ground wire and the gold finger is more flat and uniform, while ensuring the structural stability of the cable and reducing the structural deformation problem caused by bending or stretching of the cable. The composite material and the laminated structure used in the high-speed cable not only improve the overall mechanical strength and durability, but also help to adapt to the high-speed and long-distance data transmission requirements. Therefore, the application solves the technical problem of poor grounding contact of the high-speed cable. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, without creative labor, other drawings can also be obtained from these drawings.

[0017] The structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limited conditions that the application can be implemented. Therefore, any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that the application can produce, should still fall within the scope of the technical content disclosed by the application.

[0018] Figure 1A stereogram of the first high-speed cable provided for the first embodiment of the present application is shown in Figure 1. Figure 2 A cross-sectional structure diagram of the first high-speed cable provided for the first embodiment of the present application is shown in Figure 2. Figure 3 A cross-sectional structure diagram of the second high-speed cable provided for the first embodiment of the present application is shown in Figure 3. Figure 4 An enlarged structure diagram of A of Figure 1 is shown in Figure 4. Figure 3 An enlarged structure diagram of B of Figure 2 is shown in Figure 5. Figure 5 A cross-sectional structure diagram of the third high-speed cable provided for the first embodiment of the present application is shown in Figure 6. Figure 6 An enlarged structure diagram of A of Figure 3 is shown in Figure 7. Figure 5 An enlarged structure diagram of B of Figure 6 is shown in Figure 8.

[0019] Illustration: 10, signal line; 11, conductor; 12, insulating layer; 20, foamed polytetrafluoroethylene layer; 30, aluminum foil layer; 40, plastic layer; 50, flat ground wire; 60, elastic support; 61, first plane; 62, first arc surface; 63, arc chamfer; 64, second plane; 65, first channel; 66, second channel; 67, first communication hole; 68, second communication hole; 69, third communication hole; 70, condensing plate; 71, third plane; 72, second arc surface; 73, condensing hole. DETAILED DESCRIPTION

[0020] In order to make the purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0021] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: This invention provides a high-speed cable, such as... Figures 1 to 6 As shown, it includes two signal lines 10 arranged side by side along a first direction. The outer walls of the two signal lines 10 are sequentially covered with a foamed polytetrafluoroethylene layer 20, an aluminum foil layer 30, and a plastic layer 40. Two flat ground wires 50 are provided between the aluminum foil layer 30 and the plastic layer 40. The two flat ground wires 50 are distributed in layers along a second direction. The flat ground wires 50 abut against the aluminum foil layer 30 or are bonded to it by conductive adhesive. The first direction and the second direction are perpendicular to each other. The height of the two signal lines 10 along the second direction is between the height of the two flat ground lines 50 along the second direction. The projected length of the two signal lines 10 in the first direction is greater than the projected length of the flat ground lines 50 in the first direction. Both ends of the plastic layer 40 along the second direction are set as planes.

[0024] It should be noted that the high-speed cable provided by the present application makes full use of the space of the cable cross-section by arranging the flat ground wire 50 between the aluminum foil layer 30 and the plastic layer 40, without occupying too much radial size, which helps to realize the miniaturization and light weight of the cable, and meets the application requirements of high-density connection. The aluminum foil layer 30 acts as a shielding layer, effectively isolating external electromagnetic interference and making good contact with the flat ground wire 50, thereby reducing noise interference during signal transmission and improving the reliability of signal transmission. Because the projection length of the signal line 10 is greater than the projection length of the flat ground wire 50, the current return path of the signal line 10 during transmission is more ideal, effectively reducing the impedance of the high-frequency return path, and ensuring the stable transmission of high-frequency signals. Through the arrangement of the flat ground wire 50 and the flat arrangement of the two ends of the plastic layer 40, the wiring and installation of the cable are facilitated, the weld joint between the flat ground wire 50 and the gold finger is more flat and uniform, while ensuring the structural stability of the cable, reducing the structural deformation problem caused by bending or stretching of the cable. The composite material and laminated structure used in the high-speed cable not only improve the overall mechanical strength and durability, but also help to adapt to the high-speed and long-distance data transmission requirements. Therefore, the present application solves the technical problem of poor grounding contact of the high-speed cable.

[0025] As shown in Figures 3 to 6 The elastic support 60 is arranged in the foamed polytetrafluoroethylene layer 20, the first plane 61 and the first arc surface 62 are oppositely arranged on the elastic support 60, and the arc chamfer 63 is arranged on the elastic support 60 and connected with the first plane 61. The two second planes 64 are arranged on the elastic support 60 and parallel to each other between the first plane 61 and the first arc surface 62, and the height of the first plane 61 along the second direction is higher than the height of the first arc surface 62 along the second direction. In this embodiment, the elastic support 60 is made of an elastic material such as thermoplastic polyurethane elastomer rubber or silicone or silicone rubber.

[0026] Specifically, when the high-speed cable is subjected to radial pressure, the pressure is transmitted through the plastic layer 40, the aluminum foil layer 30 and the foamed polytetrafluoroethylene layer 20, and then transmitted to the first plane 61. The arrangement of the arc chamfer 63 can effectively disperse stress; the arrangement of the second arc surface 72 can uniformly transmit pressure. In addition, high-speed vibration and thermal deformation can easily cause micro-displacement of the signal line 10, causing signal attenuation. When the second arc surface 72 is in contact with the signal line 10, the mutual abrasion of the two signal lines 10 is prevented, and the fretting wear is inhibited.

[0027] As shown in Figures 3 to 6 The first channel 65 for facilitating the flow of cooling liquid and arranged along the third direction is arranged in the elastic support 60, and the first direction, the second direction and the third direction are perpendicular to each other. The first channel 65 is located between the two signal lines 10 and adjacent to the first camber 62, and the cross section of the first channel 65 is circular, and the radius of the first channel 65 is smaller than the radius of the signal line 10.

[0028] In this embodiment, when the first channel 65 has cooling liquid, the heat generated by the signal line 10 during operation can be effectively absorbed, solving the technical problem of low heat dissipation efficiency of traditional high-speed cables. Under high-speed data transmission, the temperature of the signal line 10 is too high, which will cause signal attenuation and distortion. Through the cooling liquid in the first channel 65, the temperature of the signal line 10 is reduced, ensuring that the signal line 10 operates within the normal operating temperature range, thereby improving the stability and anti-interference ability of signal transmission. By reducing the operating temperature of the signal line 10, not only can electromagnetic noise be reduced, but also signal integrity can be improved, further reducing the bit error rate. The cooling liquid pressure of the first channel 65 can provide additional support, reducing the displacement of the signal line 10 under radial pressure.

[0029] As shown in Figures 3 to 6 The elastic support 60 is provided with a second channel 66 and a first communication hole 67, the second channel 66 is used for condensing and recycling the cooling liquid evaporated in the first channel 65, the second channel 66 is arranged along the third direction and is distributed in layers with the first channel 65, and the height of the second channel 66 along the second direction is higher than the height of the first channel 65 along the second direction. The first communication hole 67 penetrates the first channel 65 and the second channel 66 respectively, the cross section of the second channel 66 is circular, and the inner diameter of the second channel 66 is larger than the inner diameter of the first channel 65.

[0030] It should be noted that through the arrangement of the second channel 66, on the one hand, the cooling liquid evaporated in the first channel 65 can be quickly recycled and returned to the first channel 65 in liquid state; on the other hand, the weight of the elastic support 60 can be reduced, thereby reducing the overall weight of the high-speed cable, and the vibration of the high-speed cable can be effectively suppressed. The recycling of the cooling liquid not only reduces the consumption of the cooling liquid, but also improves the overall efficiency of the cooling system.

[0031] Since the height of the second channel 66 along the second direction is higher than the height of the first channel 65 along the second direction, it is helpful to ensure that the cooling liquid can avoid the steam that may be deposited in the first channel 65 during recycling and flowing, and to cool smoothly and further avoid airflow interference, thereby maintaining a more constant temperature environment. Through the arrangement of the first communication hole 67, the recycling path is ensured to be smooth, and the overall thermal management performance is optimized. Since the second channel 66 adopts a circular cross section and the inner diameter is larger than that of the first channel 65, the efficiency of the cooling liquid flow is further improved, and the flow resistance is reduced, ensuring the smooth flow of the cooling liquid.

[0032] As shown in Figure 3 andFigure 4 As shown, the first communication hole 67 is a tapered hole, the direction of the second channel 66 to the first channel 65 is perpendicular to the first direction, and the inner diameter of the first communication hole 67 gradually decreases along the direction of the second channel 66 to the first channel 65.

[0033] It should be noted that, since the first communication hole 67 is a tapered hole, the flow resistance of the cooling liquid can be effectively reduced when flowing from the second channel 66 to the first channel 65, and the smooth flow of the cooling liquid is promoted. Since the inner diameter of the first communication hole 67 gradually decreases along the direction of the second channel 66 to the first channel 65, the cooling liquid can change speed during flow, so that the cooling liquid can be distributed at an appropriate flow rate when entering the first channel 65, reducing the generation of vortex flow, helping to maintain uniform flow of the cooling liquid and improve cooling effect. The inner diameter of the tapered hole gradually decreases, which conforms to the dynamic change process of the cooling liquid from gas phase to liquid phase, and helps to strengthen the efficiency of condensation and recovery of the cooling liquid. This design can effectively guide the cooling liquid to flow back to the cooling system more quickly, reducing the loss of the cooling liquid during recovery. The tapered hole provides better recovery guidance, ensures that the evaporated cooling liquid can smoothly move to the second channel 66, and reduces the accumulation of possible residual gas, optimizing the entire condensation process.

[0034] It should also be noted that, by providing a tapered hole, the contact time between the cooling liquid and the heat source (signal line 10) is increased, thereby improving the heat exchange efficiency. Longer contact time can more effectively remove heat, ensuring the stability of the signal line 10 under high frequency conditions. After the cooling liquid evaporates, the cooling process through the tapered hole effectively reduces the temperature fluctuation of the signal line 10, and the stability of the signal transmission is maintained as a whole. The cooling and recovery structure formed by the first channel 65, the first communication hole 67 and the second channel 66 effectively improves the flow and recovery efficiency of the cooling liquid, realizes continuous and efficient cooling of the signal line 10, ensures the stability and reliability of the signal in high-speed data transmission, and has good application prospect.

[0035] As shown in Figure 5 and Figure 6 The number of first channels 65 and first communication holes 67 is two, the two first channels 65 and the second channel 66 are triangularly distributed, and the second communication hole 68 is provided through between the two first channels 65. The elastic support 60 is provided with a third communication hole 69 for returning the cooling liquid in the second channel 66 to the first channel 65, and the third communication hole 69 and the second communication hole 68 are through each other.

[0036] It should be noted that the triangular distribution of the two first channels 65 and the second channel 66, and the design of the two first communication holes 67, help to guide the uniform flow of the cooling liquid in the entire system. The triangular distribution optimizes the flow path of the fluid, enabling the cooling liquid to be effectively transmitted between the two channels, avoiding the problem of stagnation or poor flow of the cooling liquid during transmission. The communication of the third communication hole 69 and the second communication hole 68 provides a convenient path for the cooling liquid to flow smoothly from the second channel 66 to the first channel 65. This design enhances the circulation ability of the cooling liquid in the system, ensuring that the cooling liquid can be recycled to the first channel 65 in time, effectively maintaining the overall cooling capacity of the system. Through the through communication hole, the cooling efficiency is greatly improved, ensuring that the cooling liquid can fully participate in heat exchange during operation, achieving the effect of rapid cooling. Through the combination of triangular distribution design and multiple channels, the distribution of cooling liquid around the signal line 10 is more uniform, ensuring that each signal line 10 can be adequately cooled. This uniform cooling configuration helps to stabilize the temperature of the signal line 10, avoiding signal attenuation and distortion caused by local overheating of the signal line 10, and improving the overall reliability of the system.

[0037] As shown in Figures 1 to 6 The second channel 66 is fixedly installed with a condensation plate 70 arranged along the third direction, and the condensation plate 70 is provided with a third plane 71 and a second arc surface 72. The third plane 71 is arranged opposite to the first communication hole 67, and the second arc surface 72 is in contact with the inner wall of the second channel 66.

[0038] It should be noted that by arranging the condensation plate 70 in the second channel 66, an efficient surface is provided for the condensation of the cooling liquid. By arranging the third plane 71, it is ensured that the cooling liquid vapor can be effectively condensed into a liquid state on the third plane 71, thereby significantly improving the heat exchange efficiency. This process accelerates the condensation of vapor by increasing the condensation area, improving the heat transfer effect. Since the third plane 71 is arranged opposite to the first communication hole 67, it helps the condensed liquid to flow back to the first channel 65 through the first communication hole 67 effectively, forming a good backflow path and ensuring the sustainable circulation of the cooling liquid in the system. This design reduces the residence time of the liquid and improves the overall circulation efficiency of the system.

[0039] In the case where the second arc surface 72 of the condensation plate 70 is in contact with the inner wall of the second channel 66, the condensation effect is further improved, thereby effectively reducing the temperature of the environment around the signal line 10 and maintaining it within the ideal working range. Through the design of the condensation plate 70, the formation of bubbles and the generation of residual liquid are effectively prevented, ensuring that the cooling liquid remains in a liquid state, thereby improving the reliability and stability of the cooling system, reducing the flow resistance and heat exchange efficiency caused by the generation of bubbles, and helping to maintain a more stable cooling effect.

[0040] As shown in Figures 4 to 6 The condensing plate 70 is provided with a plurality of condensing holes 73 arranged along the first direction, the condensing holes 73 are respectively penetrated through the third plane 71 and the second arc surface 72, and the heights of the plurality of condensing holes 73 in the second direction present a distribution of low on both sides and high in the middle.

[0041] It should be noted that the condensing holes 73 increase the effective condensing area of the condensing plate 70, which can provide more condensing surfaces for the cooling liquid vapor, thereby improving the condensing efficiency. The vapor is more likely to be converted into liquid cooling liquid when encountering the condensing plate 70, thereby improving the overall efficiency of cooling. The cooling liquid vapor gradually condenses into droplets on the condensing plate 70 and falls through the condensing holes 73. The change in height helps to maintain the fluidity of the liquid during condensation, ensuring that the liquid can be discharged in time to avoid accumulation. The linear distribution of the condensing holes 73 along the first direction allows the vapor to be directed in multiple directions, which helps to maintain uniform cooling of the condensing water. The cooling effect is more uniform throughout the condensing plate 70, avoiding the problem of local overheating or overcooling, which helps to maintain the temperature stability of the signal line 10. By reasonably arranging the condensing holes 73, the heat exchange capacity between different regions is enhanced, ensuring optimal cooling effect and heat transfer efficiency.

[0042] As shown in Figures 1 to 6 The signal line 10 includes a conductor 11 and an insulating layer 12 covering the conductor 11, the conductor 11 is circularly arranged, and the insulating layer 12 is annularly arranged; the two flat ground wires 50 have the same width along the first direction. In this embodiment, the conductor 11 can be made of high-purity oxygen-free copper or silver-plated copper wire, and the insulating layer 12 is made of high-performance insulating material (such as polytetrafluoroethylene, etc.).

[0043] The circular conductor 11 and the annular insulating layer 12 design ensures efficient current transmission and effectively reduces signal interference. Due to the combined action of the flat ground wire 50 layout and the aluminum foil layer 30, the resistance of the high-speed cable to external electromagnetic interference is significantly enhanced, providing a guarantee for the stability of high-speed signals and ensuring reliable data transmission.

[0044] Working principle: when the high-speed cable is in use, the signal line 10 transmits the signal quickly, and the aluminum foil layer 30 effectively isolates external electromagnetic interference as a shielding layer; two flat ground wires 50 are installed between the aluminum foil layer 30 and the plastic layer 40, making full use of the space of the cable cross section without occupying too much radial dimension, the weld between the flat ground wire 50 and the gold finger is more flat and uniform, while ensuring the structural stability of the cable, solving the technical problem of poor grounding contact of the high-speed cable; The elastic support 60 is embedded in the foamed polytetrafluoroethylene layer 20, and since the foamed polytetrafluoroethylene layer 20 contains closed-cell bubbles in the structure, when an external force acts, the bubble structure absorbs energy through local deformation to avoid stress concentration; the elastic support 60 can maintain the stability of the foamed structure and resist extrusion deformation, solving the technical problem that the traditional foamed polytetrafluoroethylene is easy to collapse under external pressure.

[0045] When the high-speed cable works for a long time, a large amount of heat is generated in the conductor 11; since the first channel 65 is filled with cooling liquid, the heat emitted by the conductor can be absorbed to prevent the temperature of the conductor from being too high, solving the problem that the signal transmission performance of the traditional high-speed cable is reduced due to high temperature; the setting of the two first channels 65 further improves the cooling effect of the cooling liquid; the first channel 65 is filled with cooling liquid and the second channel 66 is filled with vapor condensate, and such fluids can form a fluid damping layer in a closed space; In addition, the two first channels 65 and the second channel 66 are triangularly distributed, the cooling liquid in the first channel 65 evaporates and is condensed and recovered in the second channel 66; since the first channel 65 and the second channel 66 are connected through the first communication hole 67, the cooling liquid can be effectively transmitted between the two channels, avoiding the problem of stagnation or poor flow of the cooling liquid during transmission. The first channel 65 is filled with cooling liquid and the second channel 66 is filled with vapor condensate, and such fluids can form a fluid damping layer in a closed space; when the high-speed cable works, mechanical vibration (such as server fan disturbance, electromagnetic force coupling, etc.) occurs, and the fluid in the channel moves back and forth in a small space to absorb and dissipate part of the mechanical energy, thereby playing a damping and vibration reduction role; since the two first channels 65 and the second channel 66 are triangularly distributed, a stable triangular structure is formed, which helps to resist periodic or instantaneous vibration interference.

[0046] Then, by arranging the condensing plate 70 in the second channel 66, the third plane 71 of the condensing plate 70 provides an efficient surface for condensation of the cooling liquid, preventing the formation of bubbles and the generation of residual liquid, and ensuring that the cooling liquid remains in a liquid state. A plurality of condensing holes 73 are formed in the condensing plate 70 to increase the effective condensing area of the condensing plate 70, providing more condensing surfaces for the cooling liquid vapor, thereby improving the condensing efficiency and solving the technical problem of low condensing efficiency of the condensing plate 70.

[0047] Finally, the second communication hole 68 is arranged between the two first channels 65, and the third communication hole 69 is arranged in the elastic support 60 and communicates with the second communication hole 68, providing a convenient path for the cooling liquid to flow smoothly from the second channel 66 to the first channel 65, solving the technical problem of smooth return flow of the cooling liquid between the first channel 65 and the second channel 66.

[0048] Embodiment Two: An embodiment of the present application provides a high-speed cable assembly, comprising the high-speed cable as described in Embodiment One and a printed circuit board.

[0049] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-speed cable, characterized in that, It includes two signal lines (10) arranged side by side along a first direction. The outer walls of the two signal lines (10) are sequentially covered with a foamed polytetrafluoroethylene layer (20), an aluminum foil layer (30), and a plastic layer (40). Two flat ground wires (50) are provided between the aluminum foil layer (30) and the plastic layer (40). The two flat ground wires (50) are distributed in layers along a second direction. The flat ground wires (50) abut against the aluminum foil layer (30) or are bonded to it by conductive adhesive. Wherein, the first direction and the second direction are perpendicular to each other, the height of the two signal lines (10) along the second direction is between the height of the two flat ground lines (50) along the second direction, the projection length of the two signal lines (10) in the first direction is greater than the projection length of the flat ground line (50) in the first direction, and both ends of the plastic layer (40) along the second direction are planar.

2. The high-speed cable according to claim 1, characterized in that, The foamed polytetrafluoroethylene layer (20) is embedded with an elastic support member (60), and the elastic support member (60) is provided with a first plane (61) and a first arc surface (62) opposite to each other, and the elastic support member (60) is provided with an arc chamfer (63) that connects with the first plane (61). The elastic support (60) is also provided with two second planes (64) located between the first plane (61) and the first arc surface (62) and parallel to each other. The height of the first plane (61) along the second direction is higher than the height of the first arc surface (62) along the second direction.

3. The high-speed cable according to claim 2, characterized in that, The elastic support member (60) has a first channel (65) arranged in a third direction to facilitate the flow of coolant, and the first direction, the second direction and the third direction are perpendicular to each other; The first channel (65) is located between the two signal lines (10) and adjacent to the first arc surface (62). The cross-section of the first channel (65) is circular, and the radius of the first channel (65) is smaller than the radius of the signal line (10).

4. The high-speed cable according to claim 3, characterized in that, The elastic support (60) has a second channel (66) and a first connecting hole (67). The second channel (66) is used to condense and recover the coolant evaporated in the first channel (65). The second channel (66) is arranged along a third direction and is layered with the first channel (65). The height of the second channel (66) along the second direction is higher than the height of the first channel (65) along the second direction. The first connecting hole (67) is connected to the first channel (65) and the second channel (66) respectively. The cross-section of the second channel (66) is circular, and the inner diameter of the second channel (66) is larger than the inner diameter of the first channel (65).

5. The high-speed cable according to claim 4, characterized in that, The first connecting hole (67) is a tapered hole, the direction from the second channel (66) to the first channel (65) is perpendicular to the first direction, and the inner diameter of the first connecting hole (67) gradually decreases along the direction from the second channel (66) to the first channel (65).

6. The high-speed cable according to claim 4, characterized in that, The number of the first channel (65) and the first connecting hole (67) is set to two. The two first channels (65) and the second channel (66) are arranged in a triangular distribution, and a second connecting hole (68) is provided between the two first channels (65). The elastic support (60) has a third connecting hole (69) for returning the coolant in the second channel (66) to the first channel (65), and the third connecting hole (69) is in communication with the second connecting hole (68).

7. The high-speed cable according to claim 4 or 6, characterized in that, A condenser plate (70) arranged along a third direction is fixedly installed in the second channel (66). The condenser plate (70) is provided with a third plane (71) and a second arc surface (72). The third plane (71) is positioned opposite the first connecting hole (67), and the second arc surface (72) is in contact with the inner wall of the second channel (66).

8. The high-speed cable according to claim 7, characterized in that, The condensing plate (70) has a plurality of condensing holes (73) arranged at intervals along the first direction. The condensing holes (73) are respectively connected to the third plane (71) and the second arc surface (72). The height of the plurality of condensing holes (73) in the second direction is distributed with the two sides being lower and the middle being higher.

9. The high-speed cable according to claim 1, characterized in that, The signal line (10) includes a conductor (11) and an insulating layer (12) covering the conductor (11). The conductor (11) is circular and the insulating layer (12) is annular. The two flat ground lines (50) have the same width along the first direction.

10. A high-speed cable assembly, characterized in that, Includes high-speed cables and printed circuit boards as described in any one of claims 1 to 9.

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