Data cable for high-speed data transmission

Abstract

The utility model discloses a data cable for high-speed data transmission, which comprises two core wires arranged in parallel, the two core wires are wrapped by a solid insulating inner sheath, the solid insulating inner sheath is wrapped by a metal wrapping layer, the metal wrapping layer is wrapped by a non-metal wrapping layer, and the non-metal wrapping layer is wrapped by a metal sheath. A ground wire is arranged between the metal coating layer and the non-metal coating layer, and the ground wire is of a flat structure. According to the utility model, the cable employs the ground wire with a flat structure, is small in size, is suitable for high-density wiring, is stable in structure, and improves the anti-extrusion capability of parallel pairs; and the transmission speed is high, and differential common mode conversion is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of data cables, in particular to a data cable for high-speed data transmission. Background Art

[0002] High-speed cables play an important role in signal transmission in servers, meta-computing, data centers and other fields. In order to maintain the integrity of high-frequency and high-speed signals, higher requirements are placed on cables. Higher frequencies (30GHz, 40GHz, and different bandwidths above 67GHz) and higher transmission rates (400Gbps / 800Gbps / 1.6T) place higher requirements on the density of cable wiring. To meet the transmission rate, more cables are required to be laid in the same volume space. Cables with ordinary structures can no longer meet the growing data exchange requirements. There is an urgent need to develop small-sized, high-speed transmission data cables with stable performance.

[0003] In the field of high-speed cable transmission, the traditional high-speed line structure is to extrude a layer of insulation from a single conductor to form an insulated single-core wire, and then place two single-core wires in parallel, and then perform aluminum foil shielding and PET wrapping to form a single pair. Because the two cables forming a single pair have no crossover and no alternating twisting, they are also called "parallel pairs". Finally, multiple pairs of data lines are assembled together to form 2 pairs, 4 pairs, 8 pairs, 16 pairs of multi-pair cables, and finally braiding and outer sheathing are added to the outside; parallel pairs have excellent signal transmission capabilities in high-speed data transmission because of the addition of shielding (aluminum foil and ground wire), and the transmission rate can reach more than 25Gbps.

[0004] like Figure 2 Ordinary "parallel pair" high-speed cables are two separate PE or PP foam insulated core wires, covered with PE or PP inner sheath, and shielded with metal tape. The ground wire adopts a round wire structure and is placed on both sides. The outside is wrapped with self-adhesive polyester tape. The ordinary structural ground wire is on both sides and is round, which makes the cable very wide and not suitable for high-density wiring. Utility Model Content

[0005] The utility model aims to provide a data cable for high-speed data transmission to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a data cable for high-speed data transmission, comprising two core wires arranged in parallel, the two core wires are covered by a solid insulating inner sheath, the outer side of the solid insulating inner sheath is covered with a metal coating layer, the outer side of the metal coating layer is covered with a non-metallic coating layer, a ground wire is arranged between the metal coating layer and the non-metallic coating layer, and the ground wire adopts a flat structure ground wire.

[0007] Preferably, the core wire comprises a conductor and a foamed insulator, and the outer side of the conductor is coated with the foamed insulator.

[0008] Preferably, the conductor is a single conductor or a twisted conductor, and the size of the conductor is set to 38AWG-26AWG.

[0009] Preferably, the metal coating layer is a pure metal strip or a combination of a metal layer and a non-metal layer.

[0010] Preferably, the pure metal belt is made of aluminum, copper, alloy metal or surface-plated metal; the metal layer is made of aluminum, copper or alloy metal, and the non-metal layer is made of PET, PP, FEP or PTFE.

[0011] Preferably, the thickness of the ground wire is 0.01 mm-0.04 mm, the width of the ground wire is 0.5 mm-1.5 mm, and the surface of the ground wire is tin-plated or silver-plated.

[0012] Preferably, the metal cladding layer is wrapped longitudinally or wrapped around, and the metal surface of the metal cladding layer is in contact with the ground wire.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the cable adopts a flat structure ground wire, the cable is small in size, suitable for high-density wiring, and has a stable structure, which enhances the anti-extrusion ability of the parallel pair; it has fast transmission speed and differential common mode conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the prior art.

[0017] In the figure: 1. conductor; 2. foam insulator; 3. solid insulating inner sheath; 4. metal coating; 5. ground wire; 6. non-metallic coating. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0019] See also Figure 1 In an embodiment of the utility model, a data cable for high-speed data transmission comprises two parallel core wires, the two core wires are covered by a solid insulating inner sheath 3, the outer side of the solid insulating inner sheath 3 is covered with a metal coating 4, the outer side of the metal coating 4 is covered with a non-metallic coating 6, a ground wire 5 is arranged between the metal coating 4 and the non-metallic coating 6, and the ground wire 5 adopts a flat structure ground wire; the thickness of the ground wire 5 is 0.01mm-0.04mm, the width of the ground wire 5 is 0.5mm-1.5mm, and the surface of the ground wire 5 is tinned or silver-plated; the coating method of the metal coating 4 is longitudinally wrapped or wrapped, and the metal surface of the metal coating 4 is in contact with the ground wire 5. The cable adopts a flat structure ground wire, the cable is small in size, suitable for high-density wiring, and the structure is stable, which enhances the anti-extrusion ability of the parallel pair; the transmission speed is fast, and differential common mode conversion is achieved.

[0020] The core wire comprises a conductor 1 and a foam insulator 2, wherein the outer side of the conductor 1 is coated with the foam insulator 2; the conductor 1 adopts a single conductor 1 or a twisted conductor 1, and the size of the conductor 1 is set to 38AWG-26AWG.

[0021] The metal coating layer 4 is made of pure metal strip or a combination of metal layer and non-metal layer; the pure metal strip is made of aluminum, copper, alloy metal or surface-plated metal; the metal layer is made of aluminum, copper or alloy metal, and the non-metal layer is made of PET, PP, FEP or PTFE.

[0022] The foam insulator 2 is coated on the outside of the conductor 1. The material of the new insulator is solid insulation or foam insulation (PP / PE / FEP / Foam FEP, etc.). Solid insulation means that the insulation layer is made of solid insulating plastic material; foam insulation means that the insulation layer is made of foam material formed by injecting gas into solid plastic. The size is determined according to different materials to meet different differential impedance requirements (85ohm, 90ohm, 100ohm, etc.).

[0023] In one embodiment of the present patent, a self-adhesive glue layer is coated on the surface of the non-metallic coating layer (PET / PP layer) in contact with the solid insulator inner sheath 3. The thickness of the self-adhesive glue layer is 2-5um. After being baked in an oven, it melts, and the non-metallic coating layer (PET / PP layer) is bonded to the solid insulator inner sheath 3 to enhance the shielding effect.

[0024] The metal shielding tape 4 is wrapped longitudinally or wrapped around, and the metal surface of the metal shielding tape 4 faces outward. The metal surface of the metal shielding tape 4 contacts the flat structure ground wire 5, and the flat structure ground wire 5 and the outside of the metal shielding tape 4 are wrapped and wrapped by a non-metallic coating tape 6 to prevent the metal shielding tape 4 from loosening and causing the stability of the shielding performance; the thickness of the non-metallic is generally 0.008-0.040mm.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A data cable for high-speed data transmission, comprising two parallel core wires, characterized in that: The two core wires are covered by a solid insulating inner sheath (3), the outer side of the solid insulating inner sheath (3) is covered with a metal coating layer (4), the outer side of the metal coating layer (4) is covered with a non-metallic coating layer (6), a ground wire (5) is arranged between the metal coating layer (4) and the non-metallic coating layer (6), and the ground wire (5) adopts a flat structure ground wire.

2. A data cable for high-speed data transmission according to claim 1, characterized in that: The core wire comprises a conductor (1) and a foamed insulator (2), and the outer side of the conductor (1) is coated with the foamed insulator (2).

3. A data cable for high-speed data transmission according to claim 2, characterized in that: The conductor (1) is a single conductor (1) or a twisted conductor (1), and the size of the conductor (1) is set to 38AWG-26AWG.

4. The data cable for high-speed data transmission according to claim 1, characterized in that: The metal coating layer (4) is made of a pure metal strip or a combination of a metal layer and a non-metal layer.

5. The data cable for high-speed data transmission according to claim 4, characterized in that: The pure metal belt is made of aluminum, copper, alloy metal or surface-plated metal; the metal layer is made of aluminum, copper or alloy metal, and the non-metal layer is made of PET, PP, FEP or PTFE.

6. The data cable for high-speed data transmission according to claim 1, characterized in that: The thickness of the ground wire (5) is 0.01 mm-0.04 mm, the width of the ground wire (5) is 0.5 mm-1.5 mm, and the surface of the ground wire (5) is tin-plated or silver-plated.

7. The data cable for high-speed data transmission according to claim 1, characterized in that: The metal coating layer (4) is coated in a longitudinal manner or in a winding manner, and the metal surface of the metal coating layer (4) is in contact with the ground wire (5).

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