Multi-tube high-speed transmission line core wire and cable

Abstract

This utility model relates to a multi-tube high-speed transmission line core wire and cable, including a central conductor and an outer insulation layer located outside the central conductor. Multiple hollow insulating tubes are disposed between the outer insulation layer and the central conductor. The insulating tubes are spirally wound around the periphery of the central conductor along its length, or the insulating tubes are uniformly arranged around the periphery of the central conductor along its length. The multi-tube high-speed transmission cable, including the aforementioned tubular high-speed transmission line core wire, utilizes pre-prepared hollow insulating tubes surrounding the central conductor. This design ensures the stability of the air hole structure in the core wire, resulting in higher precision, less deformation, a lower dielectric constant for the entire cable, further reducing insertion loss, and meeting the demands of higher bandwidth data transmission.

Description

Technical Field

[0001] This utility model relates to the field of high-speed electronic signal transmission connection technology, and more specifically, to a multi-tube high-speed transmission line core and a multi-tube high-speed transmission cable. Background Technology

[0002] For transmission cables with speeds of 224G / 448G and higher, the common structure on the market mainly consists of a center conductor and an insulation layer made using a foaming process, with the insulation layer having a porous foam structure. These cables have a high dielectric constant, making them unsuitable for higher bandwidth data transmission requirements. Furthermore, these cables are larger in size, have lower stability, and higher losses, failing to meet the demands of smaller transmission equipment space, smaller wire diameters, and lower losses, thus hindering the improvement of cable transmission speeds.

[0003] Based on the current market situation, some methods of extruding the insulation layer outside the center conductor in one molding process, setting up air channels in a lotus root-like distribution, and setting air holes in the insulation layer outside the center conductor are prone to defects such as incomplete shape, inconsistent size, and deformation of air holes in actual manufacturing process. Furthermore, the air channel structure formed is unstable, and problems such as air hole collapse may even occur, thereby affecting the performance transmission of high-speed wires, resulting in unstable manufacturing process and low product yield. Utility Model Content

[0004] In view of this, one of the objectives of this utility model is to provide a multi-tube high-speed transmission line core wire with stable structure and high transmission speed.

[0005] Another objective of this invention is to provide a multi-tube high-speed transmission cable with stable structure and high transmission speed.

[0006] The objective of this utility model is achieved through the following technical solution: A multi-tube high-speed transmission line core includes a central conductor and an outer insulation layer located outside the central conductor. Multiple hollow insulating tubes are disposed between the outer insulation layer and the central conductor. The insulating tubes are spirally wound around the periphery of the central conductor along the length direction of the central conductor, or the insulating tubes are uniformly arranged around the periphery of the central conductor along the length direction of the central conductor.

[0007] As an optimization of the above scheme, an inner insulating layer is provided on the outer surface of the central conductor.

[0008] As an optimization of the above solution, the insulating tube is glued to the outer periphery of the central conductor.

[0009] As an optimization of the above solution, the insulating tube, outer insulating layer and inner insulating layer are all made of Teflon. The Teflon material of the outer insulating layer wraps around the central conductor and the insulating tube and fills the gap between the central conductor and the insulating tube.

[0010] A cable includes the aforementioned tubular high-speed transmission line core wires, wherein the tubular high-speed transmission line core wires are two parallel wires, and a sheathing layer, a shielding layer, and a heat-fused Mylar layer are sequentially disposed outside the two core wires, and a ground wire is disposed between the shielding layer and the heat-fused Mylar layer or between the sheathing layer and the shielding layer.

[0011] The shielding layer is formed by wrapping copper foil or aluminum foil around the outer edge of the covering layer.

[0012] The ground wire is a silver-plated or tin-plated copper wire, consisting of one or two wires, located between the shielding layer and the hot-melt Mylar layer or the covering layer and the shielding layer.

[0013] As an optimization of the above scheme, the coating layer is formed by single-layer or multi-layer e-PTFE foaming, or by wrapping e-PTFE foam tape, or by extruding a single layer of PE or PP or insulating Teflon.

[0014] Compared with the prior art, the present invention has the following advantages: 1. By using a pre-prepared hollow insulating tube surrounding the central conductor, the air hole structure in the core wire can be stabilized, with higher precision and less prone to deformation. This results in a lower dielectric constant for the entire cable, further reducing insertion loss and meeting the requirements for higher bandwidth data transmission.

[0015] 2. Compared with the existing air hole structure formed by extrusion molding, this structure design is easier to manufacture, has a lower defect rate, lower production cost, and higher production efficiency.

[0016] 3. The insulating tube, outer insulation layer and inner insulation layer are all made of Teflon material, which makes the core wire layers more fused and the layers more tightly connected, resulting in a stable structure and improved physical properties such as bending resistance and tensile strength of the core wire, thus improving reliability.

[0017] 4. A ground wire is provided between the shielding layer and the thermoplastic Mylar layer of the cable to ensure that the equipment is fully grounded and improve safety performance. At the same time, placing the ground wire outside the shielding layer can more effectively shield the interference of external electrical signals to internal signals.

[0018] 5. The core wire and cable have a smaller overall size and occupy less space. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of the core wire of a multi-tube high-speed transmission line as an example.

[0021] Figure 2 To adopt Figure 1 A schematic diagram of the cross-sectional structure of a cable with a core wire structure.

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the core wire of the multi-tube high-speed transmission line in Example 2.

[0023] Figure 4 To adopt Figure 3 A schematic diagram of the cross-sectional structure of a cable with a core wire structure.

[0024] Reference numerals: 1-Center conductor; 2-Outer insulation layer; 3-Insulating tube; 4-Inner insulation layer; 5-Covering layer; 6-Shielding layer; 7-Hot melt Mylar layer; 8-Ground wire; 9-Adhesive. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer and more complete, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. Example 1

[0027] As attached Figure 1 As shown. The multi-tube high-speed transmission line core disclosed in this embodiment includes, from the inside out, a central conductor 1, an inner insulation layer 4 wrapped around the outer surface of the central conductor 1, hollow insulating tubes 3 uniformly distributed around the inner insulation layer 4, and an outer insulation layer 2 wrapped around the inner insulation layer 4 and the insulating tubes 3.

[0028] The center conductor 1 is made of silver-plated or copper-plated wire. The inner insulation layer 4, the insulation tube 3, and the outer insulation layer 2 are all made of Teflon. The Teflon material of the outer insulation layer 2 wraps around the inner insulation layer 4 and the insulation tube 3 and fills the gap between the inner insulation layer 4 and the insulation tube 3. This ensures better fusion of the core wire layers, tighter interlayer bonding, and a stable structure, thereby improving the physical properties of the core wire such as bending and tensile strength and enhancing reliability.

[0029] The insulating tube 3 designed in this embodiment is a hollow tube, which is prefabricated and not formed during the overall forming of the core wire. This reduces the manufacturing difficulty of forming air holes in the outer insulation layer 2 of the core wire, enhances the hardness of the tube wall of the air hole, makes the core wire structure more stable, the air hole is not easy to collapse or deform, and the precision is also higher. It can also make the dielectric constant of the entire cable lower, further reducing insertion loss.

[0030] In this embodiment, there are multiple insulating tubes 3 (generally more than four in specific implementations). They can be arranged closely around the outer periphery of the central conductor 1, or there can be a certain gap between adjacent insulating tubes 3, with the Teflon material of the outer insulation layer 2 filling the gap. The insulating tubes 3 can be arranged evenly and parallel to the central conductor 1 along its length direction around the central conductor 1, or they can be spirally wound around the central conductor 1 along its length direction.

[0031] For example, see attached Figure 2 As shown, this is an example of using an appendix. Figure 1 A schematic diagram of the cross-sectional structure of the cable with the core wire. The cable includes two parallel core wires. Outside the two core wires, there is a sheathing layer 5, a shielding layer 6, and a heat-fused Mylar layer 7. A ground wire 8 is placed outside the shielding layer. This structure can protect the internal core wires and improve the shielding effect of interference signals, thereby improving the stability of the internal structure of the cable and the reliability of signal transmission, making it more suitable for high-speed data transmission equipment.

[0032] The covering layer 5 is formed by single-layer or multi-layer e-PTFE foaming. The shielding layer 6 is formed by wrapping copper foil or aluminum foil around the covering layer 5. The shielding layer 6 and the hot-melt Mylar layer 7 form a double-layer shield, which greatly improves the anti-interference effect of the cable.

[0033] In this embodiment, two ground wires 8 are provided, located between the shielding layer 6 and the thermoplastic Mylar layer 7, which ensures that the equipment is fully grounded and improves safety performance. At the same time, placing the ground wires outside the shielding layer 6 also more effectively shields the interference of external electrical signals on internal signals. Example 2

[0034] For example, see attached Figure 3 Appendix Figure 4 As shown. The difference between this embodiment and the first embodiment is that glue 9 is added between the insulating tube 3 and the inner insulating layer 4 to increase the positional stability of the insulating tube 3, thereby further ensuring the quality and effect of the core wire.

[0035] The other structural components and principles of this embodiment are the same as those of Embodiment 1, and will not be described again here.

[0036] In addition to the above embodiments, the technical solution of this utility model can also be implemented in other ways, such as eliminating the inner insulation layer 4. For example, the structure of the covering layer 4 can be formed by wrapping with e-PTFE foam tape, or by extruding a single layer of PE or PP or insulating Teflon, etc., which can also achieve the purpose of the invention, and will not be elaborated here.

[0037] Of course, the ground wire can also be located between the shielding layer and the sheath 4, achieving the same technical effect. Furthermore, the number of ground wires can be one, or even omitted depending on the cable application.

[0038] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-tube high-speed transmission line core wire, comprising a center conductor (1) and an outer insulation layer (2) located outside the center conductor, characterized in that, Multiple hollow insulating tubes (3) are provided between the outer insulation layer and the central conductor. The insulating tubes are spirally wound around the periphery of the central conductor along the length of the central conductor. Alternatively, the insulating tubes may be evenly arranged around the center conductor along its length.

2. The multi-tubular high-speed transmission line core wire according to claim 1, wherein An inner insulating layer (4) is provided on the outer surface of the central conductor.

3. The multi-tubular high-speed transmission line core of claim 1, wherein, The insulating tube is glued to the outer periphery of the central conductor.

4. The multi-tubular high-speed transmission line core of claim 1, wherein, The insulating tube, outer insulating layer, and inner insulating layer are all made of Teflon. The Teflon material of the outer insulating layer wraps around the central conductor and the insulating tube and fills the gap between the central conductor and the insulating tube.

5. A cable, characterized by The device includes the core wire as described in claim 1, wherein the core wire is two parallel wires, and a sheathing layer (5), a shielding layer (6), and a hot-melt Mylar layer (7) are sequentially provided outside the two core wires, and a ground wire (8) is provided between the shielding layer and the hot-melt Mylar layer or between the sheathing layer and the shielding layer.

6. The cable of claim 5, wherein, The shielding layer is formed by wrapping copper foil or aluminum foil around the outer edge of the covering layer.

7. The cable of claim 5, wherein, The ground wire is a silver-plated or tin-plated copper wire, consisting of one or two wires, located between the shielding layer and the hot-melt Mylar layer or the covering layer and the shielding layer.

8. The cable of claim 5, wherein, The coating layer is formed by single-layer or multi-layer e-PTFE foaming, or by wrapping e-PTFE foam tape, or by extruding a single layer of PE, PP or insulating Teflon.

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