A high performance coaxial cable for in-vehicle communication systems

Abstract

This utility model discloses a high-performance coaxial cable for vehicle-mounted communication systems, comprising: a conductor, and an insulation layer, a metal wrapping layer, a braided shielding layer, and a sheathing layer sequentially wrapped around the conductor; the conductor comprises multiple stranded monofilaments, each monofilament comprising a core layer and an outer layer, the core layer being graphene-coated copper, and the outer layer being a pure copper cladding layer; the insulation layer is graphene-containing polytetrafluoroethylene; the metal wrapping layer is a copper layer covered with a graphene layer; the braided shielding layer is graphene-coated copper; and the sheathing layer is made of polyurethane material. This utility model can effectively reduce the loss of high-frequency signals during transmission and has superior shielding performance compared to traditional copper / aluminum materials.

Description

Technical Field

[0001] This utility model relates to the field of cable manufacturing, and specifically to a high-performance coaxial cable for vehicle communication systems. Background Technology

[0002] Existing automotive communication cables suffer from several critical issues that urgently need to be addressed: First, pure copper conductors exhibit a significant skin effect at high frequencies, especially above 1MHz, where resistance rises sharply, severely limiting their performance in high-frequency signal transmission. Second, traditional shielding materials (such as aluminum foil) are heavy and lack flexibility, increasing the overall vehicle load and making it difficult to adapt to complex wiring environments. Furthermore, in autonomous driving scenarios, vehicles become significantly more sensitive to electromagnetic interference (EMI), placing higher demands on the interference immunity of communication cables.

[0003] Graphene, as a novel material with two-dimensional electron gas properties, has shown potential in suppressing the skin effect. However, current technologies still face significant bottlenecks: on the one hand, the graphene-copper composite interface is prone to phonon scattering, leading to a decline in its electrical performance; on the other hand, there is no perfect composite material structure design to fully leverage the advantages of graphene for high-frequency signal transmission. These issues pose numerous challenges to the practical application of graphene in automotive communication cables. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a high-performance coaxial cable for vehicle communication systems.

[0005] This utility model is implemented as follows:

[0006] A high-performance coaxial cable for vehicle communication systems includes: a conductor, and an insulation layer, a metal tape layer, a braided shielding layer, and a sheath layer sequentially wrapped around the conductor.

[0007] The conductor is made of seven 0.16mm monofilaments twisted together, with a pitch of 10mm and a diameter of 0.48mm; each monofilament includes a core layer and an outer layer, the core layer being graphene-coated copper and the outer layer being a pure copper cladding layer.

[0008] The insulating layer is polytetrafluoroethylene;

[0009] The metal wrapping layer is a copper layer covered with a graphene layer;

[0010] The braided shielding layer is graphene-coated copper, which is woven from four 0.1mm graphene-coated copper strands with a braiding density of 88%.

[0011] The sheath layer is made of polyurethane material.

[0012] Furthermore, the insulation layer has a thickness of 0.48-0.55 mm and a concentricity greater than 95%.

[0013] Furthermore, the metal wrapping layer has a thickness of 0.04 mm and a width of 7 mm.

[0014] Furthermore, the thickness of the sheath layer is 0.25-0.35 mm, and the concentricity is greater than 85%.

[0015] The advantages of this invention are: it can effectively reduce the loss of high-frequency signals during transmission, and exhibits superior shielding performance compared to traditional copper / aluminum materials. In a 10GHz high-frequency environment, the attenuation of this cable is only 3.2dB / m, approximately 52.9% lower than pure copper (6.8dB / m); in the 1GHz band, the shielding attenuation of this cable is >85dB, 30.8% higher than traditional copper / aluminum shielding (65dB), effectively preventing vehicles from being affected by electromagnetic interference (EMI) and the risk of information leakage. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of this utility model;

[0018] Figure 2 This is a diagram of the internal structure of this utility model.

[0019] in:

[0020] 100. Cable; 1. Conductor; 2. Insulation layer; 3. Metallic wrapping layer; 4. Braided shielding layer; 5. Sheath layer. Detailed Implementation

[0021] Please see Figure 1 and Figure 2 As shown, a high-performance coaxial cable 100 for a vehicle communication system includes: a conductor 1, and an insulation layer 2, a metal tape layer 3, a braided shielding layer 4, and a sheath layer 5 sequentially wrapped around the conductor 1.

[0022] Conductor 1 is composed of multiple stranded monofilaments. Each monofilament includes a core layer and an outer layer. The core layer is graphene-coated copper, which is achieved by growing graphene on the copper surface using plasma-assisted chemical vapor deposition (PECVD) to form atomic-level bonding. The outer layer is a pure copper cladding layer with a thickness of 3-10 μm, which can reduce interfacial contact resistance and significantly reduce signal loss by more than 40% in high-frequency (1-10 GHz) transmission scenarios. Ideally, the number of monofilaments should be 7, with a pitch of 10 ± 1 mm and a diameter of 0.48 mm.

[0023] The insulating layer 2 is made of polytetrafluoroethylene (PTFE), and its thickness is controlled between 0.48-0.55 mm with a concentricity greater than 95%. The insulating layer 2 can also be made of polytetrafluoroethylene doped with 0.1% graphene.

[0024] The metal wrapping layer 3 is graphene-coated copper, with a thickness of 0.04 mm and a width of 7 mm.

[0025] The braided shielding layer 4 is made of four 0.1mm graphene-coated copper strands braided together, with a braiding density of 88% and a braiding pitch of 16.2mm. This provides a shielding effectiveness of 90dB or more in the 30 to 300MHz frequency range, while reducing the weight by 50% compared to traditional copper braided layers.

[0026] The sheath layer 5 is made of polyurethane (TPU) material, with a thickness of 0.25-0.35mm and a concentricity greater than 85%.

[0027] The advantages of this invention are: it can effectively reduce the loss of high-frequency signals during transmission, and exhibits superior shielding performance compared to traditional copper / aluminum materials. In a 10GHz high-frequency environment, the attenuation of this cable is only 3.2dB / m, approximately 52.9% lower than pure copper (6.8dB / m); in the 1GHz band, the shielding attenuation of this cable is >85dB, 30.8% higher than traditional copper / aluminum shielding (65dB), effectively preventing vehicles from being affected by electromagnetic interference (EMI) and the risk of information leakage.

[0028] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A high performance coaxial cable for use in a vehicle communication system, characterized by: include: A conductor, and sequentially covering the outer layers of the conductor with an insulating layer, a metal wrapping layer, a braided shielding layer, and a sheath layer; The conductor is made of seven 0.16mm monofilaments twisted together, with a pitch of 10mm and a diameter of 0.48mm; each monofilament includes a core layer and an outer layer, the core layer being graphene-coated copper and the outer layer being a pure copper cladding layer. The insulating layer is polytetrafluoroethylene; The metal wrapping layer consists of a copper layer covered with a graphene layer; the braided shielding layer is graphene-coated copper, woven from four 0.1mm graphene-coated copper strands with a braiding density of 88%. The sheath layer is made of polyurethane material.

2. A high performance coaxial cable for in-vehicle communication systems as defined in claim 1, characterized in that: The insulation layer has a thickness of 0.48-0.55 mm and a concentricity greater than 95%.

3. The high-performance coaxial cable for vehicle communication systems as described in claim 1, characterized in that: The metal wrapping layer has a thickness of 0.04 mm and a width of 7 mm.

4. A high performance coaxial cable for in-vehicle communication systems as defined in claim 1, characterized in that: The thickness of the sheath layer is 0.25-0.35 mm, and the concentricity is greater than 85%.

Images