High-speed data transmission cable for space navigation and manufacturing method thereof

Abstract

The invention discloses a high-speed data transmission cable for aerospace and a manufacturing method thereof, and relates to the technical field of cables, the cable comprises a cable core, and a silver-plated copper wire braided total shielding layer and an ethylene-tetrafluoroethylene copolymer sheath layer are sequentially arranged outside the cable core from inside to outside; one cable core or a plurality of groups of cable cores are arranged in pairs, each cable core comprises two wire cores, a silver-plated copper bar streamline is arranged between the two wire cores or on the two sides of the two wire cores side by side, and a polyimide aluminum-plastic composite belt is arranged outside the two wire cores and the silver-plated copper bar streamline. An ethylene-tetrafluoroethylene copolymer film wrapping layer is arranged on the outer wall of the polyimide aluminum-plastic composite belt; the wire core comprises a silver-plated copper body wire, and a polytetrafluoroethylene microporous belt and polytetrafluoroethylene raw material belt combined insulating layer is arranged outside the silver-plated copper body wire; according to the cable, high-speed data transmission can be realized in an aerospace environment, and meanwhile, the problems of low cut-off frequency, remarkable high-frequency signal attenuation and the like of a traditional twisted symmetrical communication cable are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly to a high-speed data transmission cable for aerospace applications and a manufacturing method thereof. Background Art

[0002] For space information transmission technology, traditional methods can no longer meet the high requirements for data transmission speed and capacity in modern space missions.

[0003] With the continuous expansion of the data volume collected by remote sensing satellites, the data volume of space remote sensing images is increasing in geometric progression, and the demand for data transmission rate has also increased significantly, reaching hundreds or even thousands of Mbps per second. Although the current technology can achieve a maximum transmission rate of several hundred Mbps, this has become a key factor restricting the improvement of the resolution of space remote sensing images. Facing the development of new satellite data services that need to process a large amount of information and high-resolution remote sensing equipment, higher data transmission rate requirements are put forward for new remote sensing satellites, data relay satellites, space communication network node satellites, and new-generation communication satellites (such as broadband multimedia satellites and dedicated military communication satellites), that is, an ultra-high speed of several hundred megabits to the Gbps level.

[0004] Based on this, as the demand for space information high-speed data transmission technology in China's space activities becomes increasingly urgent. The past single point-to-point transmission method is difficult to meet the current needs. The direct communication between spacecraft, the cooperation between relay satellites, and the efficient interconnection and interoperability between spacecraft and relay satellites have become important directions for the evolution of the space information transmission system.

[0005] To meet the high-speed space information transmission requirements proposed by China's future remote sensing satellites, communication satellites, relay satellites, space-based integrated information networks, as well as deep space exploration, manned spacecraft, and space stations, etc., it is necessary to accelerate the research and development of China's space information high-speed transmission system; this includes but is not limited to the efficient processing, compression, storage, and transmission technologies of satellite internal data. Therefore, the existing hundred-megabit data transmission cables are difficult to meet the needs of high-speed data exchange between spacecraft, so it is urgent to develop a higher-performance data transmission solution. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-speed data transmission cable for aerospace applications and a manufacturing method thereof, and solve the following technical problems:

[0007] How to improve the performance of data transmission cables.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] In a first aspect, the present invention discloses a high-speed data transmission cable for aerospace applications, comprising a cable core, and a silver-plated copper wire braided overall shielding layer and an ethylene-tetrafluoroethylene copolymer sheath layer are sequentially arranged from the inside to the outside of the cable core;

[0010] One or several groups of the cable cores are provided in pairs. Each cable core includes two wire cores, and a silver-plated copper drainage strip is placed side by side between or on both sides of the two wire cores. A polyimide-aluminum-plastic composite tape is provided outside the two wire cores and the silver-plated copper drainage strip, and an ethylene-tetrafluoroethylene copolymer film wrapping layer is provided on the outer wall of the polyimide-aluminum-plastic composite tape;

[0011] The wire core includes a silver-plated copper body conductor, and a combined insulation layer of a polytetrafluoroethylene microporous tape and a polytetrafluoroethylene green tape is provided outside the silver-plated copper body conductor.

[0012] In a further aspect of the present invention, the thickness of the silver-plated copper body conductor is ≥1.5 μm, the elongation at break is ≥6%, and the resistivity is ≤0.017241 Ω·mm 2 / m.

[0013] In a further aspect of the present invention, the combined insulation layer of the polytetrafluoroethylene microporous tape and the polytetrafluoroethylene green tape is formed by combining and wrapping the polytetrafluoroethylene microporous tape and the polytetrafluoroethylene green tape; wherein, the density of the polytetrafluoroethylene microporous tape is ≤0.7 g / cm 3 , the tensile strength is ≤10 MPa, and the elongation at break is ≤75%; the density of the polytetrafluoroethylene green tape is 1.55 - 1.65 g / cm 3 , the tensile strength is ≤10 MPa, and the elongation at break is ≤80%.

[0014] In a further aspect of the present invention, the overlapping rate of the polyimide-aluminum-plastic composite tape is ≥25%, the density is 1.65 g / cm 3 , the tensile strength is ≥80 MPa, and the elongation at break is ≥20%.

[0015] In a further aspect of the present invention, the overlapping rate of the ethylene-tetrafluoroethylene copolymer film wrapping layer is ≥25%, the nominal density is 1.75 g / cm 3 , the tensile strength is ≥35 MPa, the elongation at break is ≥300%, the melting point is 220 - 255 °C, and the dielectric strength is ≥60 kV / mm.

[0016] In a further aspect of the present invention, the braiding density of the silver-plated copper wire braided overall shielding layer is ≥92%.

[0017] In a further aspect of the present invention, the concentricity of the ethylene-tetrafluoroethylene copolymer sheath layer is ≥70%, and the tensile strength is 48 - 52 MPa.

[0018] In a further embodiment of the present invention, the number of pairs of the cable cores is 1, 2, 4 or 8 pairs.

[0019] In a further embodiment of the present invention, a layer of polyimide aluminum-plastic composite tape is further provided inside the silver-plated copper wire braided overall shielding layer, and the overlapping rate of this layer of polyimide aluminum-plastic composite tape 4 is ≥ 25%.

[0020] Second, the present invention also discloses a manufacturing method of the high-speed data transmission cable for aerospace as described above, including the following steps:

[0021] S1. Wrap a combined insulating layer of expanded polytetrafluoroethylene tape and polytetrafluoroethylene green tape around the silver-plated copper wire conductor to form a wire core. Place a silver-plated copper drainage strip side by side between or on both sides of the two wire cores. Then, wrap a polyimide aluminum-plastic composite tape around the two wire cores and the drainage strip in an overlapping longitudinal wrapping manner. Next, wrap an ethylene-tetrafluoroethylene copolymer film wrapping layer on the outer wall of the polyimide aluminum-plastic composite tape to form a cable core;

[0022] S2. Arrange one or several cable cores in pairs; if there is one cable core, directly wrap a silver-plated copper wire braided overall shielding layer on the outer wall of the cable core; if there are several cable cores arranged in pairs, first wrap a polyimide aluminum-plastic composite tape around the outside of the paired cable cores in an overlapping manner, and then wrap a silver-plated copper wire braided overall shielding layer on the outer wall of this polyimide aluminum-plastic composite tape;

[0023] S3. Wrap an ethylene-tetrafluoroethylene copolymer sheath layer on the outside of the silver-plated copper wire braided overall shielding layer to finally obtain the high-speed data transmission cable for aerospace.

[0024] In a further embodiment of the present invention, in step S1, after the combined insulating layer of expanded polytetrafluoroethylene tape and polytetrafluoroethylene green tape is wrapped, a shaping treatment and a heat treatment are carried out, and the temperature parameter of the heat treatment is 400 - 450 °C.

[0025] Advantages of the present invention:

[0026] The high-speed data transmission cable for aerospace of the present invention can ensure high-speed data transmission in the aerospace environment while effectively solving problems existing in traditional stranded symmetrical communication cables, such as low cut-off frequency and significant high-frequency signal attenuation; by adding an ethylene-tetrafluoroethylene copolymer film wrapping layer between the partial shielding layer formed by the polyimide aluminum-plastic composite tape and the silver-plated copper wire braided overall shielding layer, a double-layer shielding structure is formed. Compared with the traditional design, the electromagnetic interference resistance ability of the cable is enhanced, the stability and reliability of data transmission are ensured, and the transmission cut-off frequency of the high-speed data transmission cable reaches 15 GHz. Description of the Drawings

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 It is a schematic structural diagram of the high-speed data transmission cable for aerospace use in Embodiment 1 of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the high-speed data transmission cable for aerospace use in Embodiment 2 of the present invention.

[0030] In the figure: 1. Silver-plated copper strip streamline; 2. Silver-plated copper wire conductor; 3. Combined insulating layer of polytetrafluoroethylene microporous tape and polytetrafluoroethylene green tape; 4. Polyimide aluminum-plastic composite tape; 5. Ethylene-tetrafluoroethylene copolymer film wrapping layer; 6. Silver-plated copper wire braided overall shielding layer; 7. Ethylene-tetrafluoroethylene copolymer sheath layer. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0032] Embodiment 1

[0033] Please refer to Figure 1 , this embodiment discloses a high-speed data transmission cable for aerospace use, including a cable core. The cable core includes two wire cores. A silver-plated copper strip streamline 1 is placed between the two wire cores. A polyimide aluminum-plastic composite tape 4 is provided outside the two wire cores and a silver-plated copper strip streamline 1, and the polyimide aluminum-plastic composite tape 4 is closely attached to the silver-plated copper strip streamline 1; an ethylene-tetrafluoroethylene copolymer film wrapping layer 5 is provided on the outer wall of the polyimide aluminum-plastic composite tape 4; wherein, the wire core includes a silver-plated copper body wire 2, and a combined insulating layer 3 of polytetrafluoroethylene microporous tape and polytetrafluoroethylene green tape is provided outside the silver-plated copper body wire 2; the two wire cores, the silver-plated copper strip streamline 1, the outer wall of the polyimide aluminum-plastic composite tape 4 and the ethylene-tetrafluoroethylene copolymer film wrapping layer 5 together constitute the cable core.

[0034] A silver-plated copper wire braided overall shielding layer 6 is provided on the outer wall of the cable core, and an ethylene-tetrafluoroethylene copolymer sheath layer 7 is provided on the outer wall of the silver-plated copper wire braided overall shielding layer 6, thus constituting the high-speed data transmission cable for aerospace use in this embodiment.

[0035] Next, each part of the high-speed data transmission cable for aerospace use in this embodiment will be introduced in detail one by one, as follows.

[0036] The silver-plated copper body wire 2 uses silver-plated soft round copper wire to meet the current transmission requirements under high-frequency conditions by utilizing the good electrical conductivity of silver. Due to the skin effect, current tends to flow on the surface of the conductor at high frequencies. Silver-plated copper material can provide excellent electrical conductivity in this case, and the thickness of the silver-plated copper body wire 2 is ≥1.5 μm, the elongation at break is ≥6%, and the resistivity is ≤0.017241 Ω·mm 2 / m.

[0037] The combined insulation layer 3 of polytetrafluoroethylene microporous tape and polytetrafluoroethylene raw tape is formed by combining and winding the polytetrafluoroethylene microporous tape and the polytetrafluoroethylene raw tape. This material has the advantages of a low relative dielectric constant, a small dielectric loss tangent value, and a light weight. However, its softness may cause deformation problems during the production process. To improve this, a shaping treatment is required after insulation winding to make the outer diameter of the insulation layer more uniform. Although the subsequent high-temperature heat treatment improves the mechanical strength of the insulation material, it also increases its relative dielectric constant. Therefore, by adjusting the heat treatment parameters, the change in the dielectric constant can be controlled while maintaining the mechanical strength. Among them, the density of the polytetrafluoroethylene microporous tape is ≤0.7 g / cm 3 , the tensile strength is ≤10 MPa, and the elongation at break is ≤75%; the density of the polytetrafluoroethylene raw tape is 1.55 - 1.65 g / cm 3 , the tensile strength is ≤10 MPa, and the elongation at break is ≤80%.

[0038] The polyimide aluminum-plastic composite tape 4 is used as the partial shielding layer in an overlapping longitudinal wrapping manner, and its aluminum side should face inward to ensure that the overlapping rate is not less than 25%. The digital communication cable manufactured in this way can significantly reduce the crosstalk between wire pairs and enhance its ability to resist external electromagnetic interference at the same time. Compared with the traditional wrapping shield, the longitudinal wrapping shield not only provides better mechanical protection, but also, due to its structural characteristics, is not prone to displacement or deformation when subjected to external forces, thus more effectively protecting the internal wires from physical damage. Especially in fields such as aerospace, the cable must be able to cope with harsh conditions such as extreme temperature fluctuations and radiation. The longitudinal wrapping shield design of the cable can better meet these requirements and ensure long-term stable working performance in extreme environments. To ensure the shielding effect and mechanical properties, the density requirement of the polyimide aluminum-plastic composite tape 4 is 1.65 g / cm 3 , the tensile strength is ≥80 MPa, and the elongation at break is ≥20%.

[0039] The overlapping rate of the ethylene-tetrafluoroethylene copolymer film wrapping layer 5 is ≥25%. This helps to reduce the current loop caused by the potential difference that may occur between shielding layers, thereby improving the anti-interference ability and signal integrity of the system. The nominal density of the ethylene-tetrafluoroethylene copolymer film wrapping layer 5 is required to be 1.75 g / cm 3, the tensile strength ≥ 35 MPa, the elongation at break ≥ 300%, the melting point is 220 - 255 °C, and the dielectric strength ≥ 60 kV / mm.

[0040] The braiding density of the silver-plated copper wire braided total shielding layer 6 ≥ 92%, which can further enhance the anti-interference ability of the cable.

[0041] The concentricity of the ethylene-tetrafluoroethylene copolymer sheath layer 7 ≥ 70%, and it has high corrosion resistance, high and low temperature resistance, radiation resistance, flame retardancy and low density characteristics. Compared with the traditional polytetrafluoroethylene material, its tensile strength reaches 48 - 52 MPa, about twice that of polytetrafluoroethylene.

[0042] For the above reasons, compared with the existing stranded symmetric communication cables or optical fibers, the aerospace high-speed data transmission cable of this embodiment has certain advantages in cost, especially more economical in short-distance transmission applications; and its design principle is simple, this design simplifies the production process and reduces the installation difficulty; within an appropriate frequency range, the aerospace high-speed data transmission cable can ensure good signal transmission performance, especially suitable for short-distance and medium data rate requirements; by precisely designing to ensure impedance matching between the cable and the system load, signal reflection can be effectively reduced, signal quality and transmission efficiency can be enhanced, and the double-layer shielding design of the polyimide aluminum-plastic composite tape 4 and the silver-plated copper wire braided total shielding layer 6 provides effective protection against electromagnetic interference.

[0043] Embodiment 2

[0044] On the basis of Embodiment 1, this embodiment discloses a manufacturing method of an aerospace high-speed data transmission cable, including the following steps:

[0045] S1. Wrap a combined insulating layer 3 of polytetrafluoroethylene microporous tape and polytetrafluoroethylene raw tape around the silver-plated copper wire conductor 2, perform sizing treatment and heat treatment, and the temperature parameter of the heat treatment is 400 - 450 °C to form a wire core. Place a silver-plated copper drainage wire 1 between the two wire cores, and then wrap the polyimide aluminum-plastic composite tape 4 around the outside of the two wire cores and the drainage wire 1 in an overlapping longitudinal wrapping manner. Then wrap an ethylene-tetrafluoroethylene copolymer film wrapping layer 5 on the outer wall of the polyimide aluminum-plastic composite tape 4 to form a cable core;

[0046] S2. Directly wrap a silver-plated copper wire braided total shielding layer 6 on the outer wall of the cable core;

[0047] S3. Wrap an ethylene-tetrafluoroethylene copolymer sheath layer 7 on the outside of the silver-plated copper wire braided total shielding layer 6 to finally obtain an aerospace high-speed data transmission cable.

[0048] Embodiment 3

[0049] Please refer to Figure 2, on the basis of Embodiment 1, this embodiment discloses a high-speed data transmission cable for aerospace applications. Compared with Embodiment 1, the difference is only that the high-speed data transmission cable for aerospace applications includes two paired cable cores, and at the same time, a layer of polyimide aluminum-plastic composite tape 4 is further provided inside the silver-plated copper wire braided overall shielding layer 6, and the overlap rate of the polyimide aluminum-plastic composite tape 4 is ≥ 25%.

[0050] It should be noted that the number of cable cores is not limited to two, that is, one pair, in this embodiment; in other embodiments, the number of cable cores can be set in pairs according to actual application requirements. For example, it can also be set to 2, 4 or 8 pairs.

[0051] Embodiment 4

[0052] This embodiment discloses a manufacturing method of a high-speed data transmission cable for aerospace applications on the basis of Embodiment 3, including the following steps:

[0053] S1. Wrap a combined insulating layer 3 of polytetrafluoroethylene microporous tape and polytetrafluoroethylene green tape around the silver-plated copper wire conductor 2, perform shaping treatment and heat treatment, and the temperature parameter of the heat treatment is 400 - 450 °C to form a wire core. Place a silver-plated copper drainage wire 1 between the two wire cores, and then wrap a polyimide aluminum-plastic composite tape 4 around the outside of the two wire cores and the drainage wire 1 in an overlapping longitudinal wrapping manner. Then wrap an ethylene-tetrafluoroethylene copolymer film wrapping layer 5 on the outer wall of the polyimide aluminum-plastic composite tape 4 to form a cable core, and a total of two cable cores are manufactured;

[0054] S2. Arrange the two cable cores in pairs. First, wrap a polyimide aluminum-plastic composite tape 4 around the outside of the paired cable core pair in an overlapping manner, and then wrap a silver-plated copper wire braided overall shielding layer 6 on the outer wall of the polyimide aluminum-plastic composite tape 4;

[0055] S3. Wrap an ethylene-tetrafluoroethylene copolymer sheath layer 7 on the outside of the silver-plated copper wire braided overall shielding layer 6 to finally obtain a high-speed data transmission cable for aerospace applications.

[0056] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present invention. In addition, "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0058] The above has described in detail one embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A high-speed data transmission cable for aerospace, characterized in that: It comprises a cable core, wherein the exterior of the cable core is provided with a silver-plated copper wire braided overall shielding layer (6) and an ethylene-tetrafluoroethylene copolymer sheath layer (7) in sequence from the inside to the outside; The cable core is provided with one or several groups of pairs, each cable core comprises two wire cores, a silver-plated copper drain wire (1) is placed side by side between the two wire cores or on both sides, a polyimide aluminum-plastic composite tape (4) is provided outside the two wire cores and the silver-plated copper drain wire (1), and an ethylene-tetrafluoroethylene copolymer film wrapping layer (5) is provided on the outer wall of the polyimide aluminum-plastic composite tape (4); The wire core comprises a silver-plated copper conductor (2), and a polytetrafluoroethylene microporous tape and a polytetrafluoroethylene raw tape combined insulation layer (3) is provided on the outside of the silver-plated copper conductor (2).

2. The aerospace high-speed data transmission cable according to claim 1, characterized in that: The thickness of the silver-plated copper conductor (2) is ≥1.5um, the elongation at break is ≥6%, and the resistivity is ≤0.017241Ω·mm 2 / m.

3. The high-speed data transmission cable for aerospace use according to claim 1, characterized in that: The polytetrafluoroethylene microporous tape and polytetrafluoroethylene raw tape combined insulation layer (3) is formed by wrapping the polytetrafluoroethylene microporous tape and the polytetrafluoroethylene raw tape together; wherein the density of the polytetrafluoroethylene microporous tape is ≤0.7 g / cm 3 , tensile strength ≤ 10MPa, elongation at break ≤ 75%; the density of the polytetrafluoroethylene raw tape is 1.55-1.65g / cm 3 , tensile strength ≤10MPa, elongation at break ≤80%.

4. The high-speed data transmission cable for aerospace use according to claim 1, characterized in that: The overlap rate of the polyimide aluminum-plastic composite tape (4) is ≥25%, and the density is 1.65 g / cm 3 , tensile strength ≥80MPa, elongation at break ≥20%.

5. The high-speed data transmission cable for aerospace use according to claim 1, characterized in that: The overlap rate of the ethylene-tetrafluoroethylene copolymer film wrapping layer (5) is ≥25%, and the nominal density is 1.75 g / cm 3 , tensile strength ≥35MPa, elongation at break ≥300%, melting point 220-255℃, dielectric strength ≥60kV / mm.

6. The high-speed data transmission cable for aerospace use according to claim 1, characterized in that: The braiding density of the silver-plated copper wire braided total shielding layer (6) is ≥92%.

7. The high-speed data transmission cable for aerospace use according to claim 1, characterized in that: The concentricity of the ethylene-tetrafluoroethylene copolymer sheath layer (7) is ≥70%, and the tensile strength is 48-52 MPa.

8. The aerospace high-speed data transmission cable according to claim 1, characterized in that: The number of the cable cores arranged in pairs is 1, 2, 4 or 8 pairs.

9. The high-speed data transmission cable for aerospace use according to claim 8, characterized in that: A layer of polyimide aluminum-plastic composite tape (4) is also arranged on the inner side of the silver-plated copper wire braided total shielding layer (6), and the overlapping rate of the layer of polyimide aluminum-plastic composite tape (4) is ≥25%.

10. A method for manufacturing aerospace high-speed data transmission cable according to any one of claims 1 to 9, characterized in that: The steps include: S1. Wrapping a polytetrafluoroethylene microporous tape and a polytetrafluoroethylene raw tape combined insulation layer (3) around the outside of the silver-plated copper wire conductor (2) to form a wire core, placing a silver-plated copper drain wire (1) side by side between the two wire cores or on both sides, then wrapping a polyimide aluminum-plastic composite tape (4) around the outside of the two wire cores and the drain wire (1) in an overlapping longitudinal manner, and then wrapping an ethylene-tetrafluoroethylene copolymer film wrapping layer (5) around the outer wall of the polyimide aluminum-plastic composite tape (4) to form a cable core; S2. Arrange one or more cable cores in pairs; if there is one cable core, directly wrap a silver-plated copper wire braided general shielding layer (6) on the outer wall of the cable core; if there are several cable cores arranged in pairs, first wrap a polyimide aluminum-plastic composite tape (4) on the outer side of the paired cable cores, and then wrap a silver-plated copper wire braided general shielding layer (6) on the outer wall of the polyimide aluminum-plastic composite tape (4); S3. Wrap an ethylene-tetrafluoroethylene copolymer sheath layer (7) around the outside of the silver-plated copper wire braided total shielding layer (6), and finally obtain a high-speed data transmission cable for aerospace use.

11. The method for manufacturing aerospace high-speed data transmission cable according to claim 10, characterized in that: In step S1, after the polytetrafluoroethylene microporous tape and polytetrafluoroethylene raw tape combined insulation layer (3) is wrapped, it is subjected to shaping treatment and heat treatment, and the temperature parameter of the heat treatment is 400-450°C.

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