Highly shielded ethernet cable for vehicle, and manufacturing method thereof

Abstract

Disclosed is a highly shielded Ethernet cable for a vehicle. The highly shielded Ethernet cable for a vehicle according to an embodiment of the present invention comprises: a core unit formed by twisting a pair of cores with a predetermined pitch, the cores including insulators surrounding conductors; a tape layer formed by surrounding the outer circumference of the core unit with a tape in the direction opposite to a direction in which the pair of cores are twisted; a bedding layer formed to surround the tape layer; a shielding layer formed to surround the bedding layer; and a sheath layer formed to surround the shielding layer.

Description

Highly shielded Ethernet cable for vehicles and its manufacturing method

[0001] The present invention relates to a highly shielded Ethernet cable for vehicles and a method for manufacturing the same, and more particularly, to a highly shielded Ethernet cable for vehicles capable of improving LCL / LCTL electrical characteristics and a method for manufacturing the same.

[0002] Among the most widely used communication cables in vehicles, Ethernet cables are widely used in a wide range of applications. Furthermore, the automotive Ethernet market is steadily expanding due to advancements in autonomous driving and infotainment, leading to a significant increase in demand for Ethernet cables. Here, infotainment refers to an integrated multimedia system that combines information and entertainment.

[0003] In line with this trend, applications requiring in-vehicle data, such as autonomous driving and infotainment, are continuously evolving and their usage is increasing. However, currently available Ethernet cables face limitations in data speed and capacity, making them unable to keep pace with the pace of application development. Therefore, the development of alternative cables capable of transmitting and receiving more data is urgently needed.

[0004] Ethernet cables are broadly divided into UTP (Unshielded Twisted Pair) and STP (Shielded Twisted Pair). Since STP has better noise characteristics due to shielding than UTP, the development direction of high-performance Ethernet cables is moving toward the STP structure.

[0005] Cables with STP structure are broadly classified into two types, Class 1 and Class 2. Class 1 has the characteristic of requiring LCL / LCTL (TCL / TCTL) items along with lower shielding properties compared to Class 2, while Class 2 requires higher shielding properties compared to Class 1 but does not require LCL / LCTL (TCL / TCTL) items.

[0006] Therefore, in order to overcome the limitations of currently available Ethernet cables, development of a cable that can satisfy all the items specified in Class 1 and Class 2 is required.

[0007] In order to solve the above-mentioned problems, the technical task of the present invention is to propose a highly shielded Ethernet cable for vehicles that has high shielding properties and satisfies a certain level of LCL / LCTL values, thereby being advantageous for high-speed and large-capacity data transmission, and a method for manufacturing the same.

[0008] The problems solved by the present invention are not limited to those mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

[0009] As a means for solving the above-described technical problem, a highly shielded Ethernet cable for a vehicle according to an embodiment of the present invention includes a core portion formed by twisting a pair of cores including an insulator that wraps a conductor with each other at a preset pitch, a tape layer formed by wrapping a tape around an outer periphery of the core portion in a direction opposite to the direction in which the pair of cores are twisted, a bedding layer formed in a shape that surrounds the tape layer, a shielding layer formed in a shape that surrounds the bedding layer, and a sheath layer formed in a shape that surrounds the shielding layer.

[0010] The above conductor may have a structure in which multiple conductor wires are arranged around a single central wire.

[0011] The width of the tape and the angle at which the tape is wrapped can satisfy the following formula:

[0012]

[0013] Here, a is the width of the tape, and b is the angle at which the tape is wrapped.

[0014] The width of the above tape is in the range of 5 mm to 20 mm, and the tape can be wrapped to form an angle within the range calculated by the above formula based on the use width based on the central axis of the core portion.

[0015] The above tape can be selected from a group of polymer series tapes.

[0016] The preset pitch of the core portion formed by twisting the above pair of cores may be 7 mm to 50 mm.

[0017] The tape wrapping the outer periphery of the above core portion can be wound in a wrap shape in which a portion of the width of the tape overlaps.

[0018] Meanwhile, a method for manufacturing a highly shielded Ethernet cable for a vehicle according to another embodiment of the present invention includes a step of forming a core portion by twisting a pair of cores including an insulator wrapping a conductor in one direction at a preset pitch, a step of forming a tape layer by wrapping a tape in one direction and an opposite direction on the outside of the core portion, a step of forming a bedding layer surrounding the tape layer, a step of forming a shielding layer surrounding the bedding layer, and a step of forming a sheath layer surrounding the shielding layer.

[0019] The width of the above tape and the angle at which the tape is wrapped can satisfy the following formula:

[0020]

[0021] Here, a is the width of the tape, and b is the angle at which the tape is wrapped.

[0022] The width of the above tape is in the range of 5 mm to 20 mm, and the tape can be wrapped to form an angle within the range calculated by the above formula based on the use width based on the central axis of a pair of cores.

[0023] According to the present invention, by forming a tape layer that wraps the core constituting the cable, there is provided a vehicle-use high-shielding Ethernet cable that satisfies both the high LCL / LCTL characteristics required for Class 1 and the high shielding characteristics required for Class 2, and a method for manufacturing the same.

[0024] This has the effect of providing a highly shielded Ethernet cable for vehicles that can accommodate all applications requiring large amounts of data transmission, such as autonomous driving and infotainment.

[0025] The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0026] Figure 1 is a cross-sectional view of a highly shielded Ethernet cable for a vehicle according to one embodiment of the present invention;

[0027] FIG. 2 is a perspective view showing the core and tape layer of a highly shielded Ethernet cable for a vehicle according to one embodiment of the present invention;

[0028] FIG. 3 is a conceptual diagram for explaining the width and angle of a tape forming a tape layer in a highly shielded Ethernet cable for a vehicle according to one embodiment of the present invention.

[0029] Figure 4 is a drawing to explain an incorrect example of tape layer formation.

[0030] Figure 5 is a graph showing the results of LCL / LCTL evaluation according to the formation direction of the tape layer.

[0031] Figures 6 to 8 are graphs showing the results of LCL / LCTL evaluation according to the angle of the tape forming the tape layer, and

[0032] FIG. 9 is a flowchart illustrating a method for manufacturing a highly shielded Ethernet cable for a vehicle according to one embodiment of the present invention.

[0033] The above-described purposes, other purposes, features, and advantages of the present invention will be readily understood through the following preferred embodiments, illustrated in the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosure is thorough and complete, and to sufficiently convey the spirit of the present invention to those skilled in the art.

[0034] In this specification, when a component is referred to as being on another component, it means that it can be formed directly on the other component, or a third component may be interposed between them. Furthermore, in the drawings, the thicknesses of the components are exaggerated for the purpose of effectively explaining the technical contents.

[0035] When terms such as "first," "second," etc. are used herein to describe components, these components are not intended to be limited by these terms. These terms are used merely to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments.

[0036] Additionally, when it is said that a first element (or component) operates or executes on a second element (or component), it should be understood that the first element (or component) operates or executes in an environment in which the second element (or component) operates or executes, or operates or executes through direct or indirect interaction with the second element (or component).

[0037] Additionally, the terminology used herein is for the purpose of describing embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise. As used herein, the terms "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components.

[0038] FIG. 1 is a cross-sectional view of a highly shielded Ethernet cable for a vehicle according to one embodiment of the present invention.

[0039] Referring to FIG. 1, a highly shielded Ethernet cable for a vehicle (hereinafter referred to as an “Ethernet cable”) according to one embodiment of the present invention is composed of a core portion (100), a tape layer (200), a bedding layer (300), a shielding layer (400), and a sheath layer (500).

[0040] The core portion (100) is formed by twisting a pair of cores (110, 120) including an insulator (114, 124) surrounding a conductor (112, 122) in one direction at a preset pitch, that is, in one direction of either S-strand or Z-strand. Here, the preset pitch at which the pair of cores (110, 120) are twisted may be a value in the range of 7 mm to 50 mm.

[0041] The conductor (112, 122) may be formed in a shape in which multiple conductor wires are arranged around a central wire of one strand. As illustrated, six conductor wires may be arranged around a central wire of one strand. However, this is merely an example, and 6N conductor wires may be arranged per N layers around the central wire of one strand, for example, 1+6 wires, 1+6+12 wires, etc. The purpose of forming the conductor (112, 122) in this shape is to maintain a stable conductor shape. In addition, the conductor (112, 122) may be made of a metal material such as copper, aluminum, or silver, or an alloy thereof.

[0042] The insulator (114, 124) is formed in a shape that surrounds the outer periphery of the conductor (112, 122), and can be formed by extrusion of an insulating composition including a polymer resin having electrical insulating properties as a base resin, etc. Here, the polymer resin is not particularly limited as long as it can implement electrical insulating properties, but may include, for example, a polyolefin resin such as polyethylene, ethylene vinyl acetate, ethylene ethyl acetate, and ethylene butylacrylate.

[0043] The tape layer (200) is formed by wrapping the tape around the outer periphery of the core portion (100) in the opposite direction to the direction in which the pair of cores (110, 120) are twisted. What is important when forming the tape layer (200) is that the tape must be wrapped in the opposite direction to the direction of the twisted wires by the core portion (100). That is, if the direction of the twisted wires is Z-twisted, the tape must be wrapped in the S-twisted direction, and if the direction of the twisted wires is S-twisted, the tape must be wrapped in the Z-twisted direction. The reason why the direction of the tape must be opposite to the direction of the twisted wires will be examined in more detail with reference to FIGS. 4 and 5.

[0044] The bedding layer (300) is formed to surround the tape layer (200). In a typical Ethernet cable, the bedding layer (300) is arranged to fill the empty space between the core and the shielding layer, and this structure can improve the circularity of the Ethernet cable and provide structural stability. In the present embodiment, since the tape layer (200) surrounds the core portion (100), the bedding layer (300) is arranged between the tape layer (200) and the shielding layer (400).

[0045] The bedding layer (300) may be made of a resin such as polyvinyl chloride (PVC), polyethylene (PE), cross-linked polyethylene (XLPE), polypropylene (PP), or fluorinated ethylene propylene (FEP). The bedding layer (200) using these resins increases the permittivity outside the core portion (100) and increases the physical distance between the core portion (100) and the shielding layer (400), thereby changing the overall effective permittivity and capacitor value, thereby shifting the point where attenuation distortion occurs to a higher frequency band than a conventional Ethernet cable, thereby preventing attenuation distortion from occurring within the required frequency bandwidth.

[0046] The shielding layer (400) is formed to surround the bedding layer (300). The shielding layer (400) functions to block electromagnetic waves emitted from the core portion (100) to the outside and electromagnetic waves attempting to penetrate the Ethernet cable from the outside by reflecting or absorbing them. The shielding layer (400) may include a first shielding layer (410) and a second shielding layer (420).

[0047] The first shielding layer (410) is formed in a form that surrounds the bedding layer (300) so as to be in contact with the bedding layer (300), and an aluminum tape may be applied. For example, the first shielding layer (410) may be formed by an aluminum tape, such as an aluminum-mylar tape in which aluminum foil is attached to a polyester film.

[0048] The second shielding layer (420) is formed in a form that surrounds the first shielding layer (410), and a metal braid may be applied. For example, the second shielding layer (420) may be formed by a metal braid such as a tin-plated copper braid.

[0049] The sheath layer (500) is formed in a form that surrounds the shielding layer (400). The sheath layer (500) is formed in a form that surrounds the shielding layer (400), i.e., the second shielding layer (420), and forms the outermost layer of the Ethernet cable. The sheath layer (500) performs the function of protecting the core part (100) from external pressure or impact by wrapping the entire core part (100). For example, the sheath layer (500) may be formed using polyvinyl chloride resin, polyethylene resin, fluororesin, etc., and among them, it may be formed by extrusion of an outer composition including polyvinyl chloride resin having excellent flexibility as a base resin.

[0050] FIG. 2 is a perspective view illustrating a core and a tape layer of a highly shielded Ethernet cable for a vehicle according to one embodiment of the present invention, and FIG. 3 is a conceptual diagram for explaining the width and angle of a tape forming a tape layer in a highly shielded Ethernet cable for a vehicle according to one embodiment of the present invention.

[0051] As illustrated in Fig. 2, conductors (112, 122) made of wires are twisted at a constant pitch to form a core portion (100). Thereafter, a tape layer (200) is formed on the core portion (100) using tape. The tape layer (200) is formed over the entire core portion (100), and is formed by winding the tape in a direction opposite to the direction in which a pair of cores (110, 120) are twisted.

[0052] To improve LCL / LCTL characteristics, the Ethernet cable structure must be uniform overall. However, in the case of Daeyeon wire, the core portion (100) is twisted at a constant pitch, making it difficult to extrude the material. In this case, if high pressure is applied to fill the space between a pair of cores (110, 120), the pressure can cause the cores to gap or even cause the pitch to become uneven.

[0053] To solve this problem, in the Ethernet cable according to the present invention, the core part (100) is formed by winding the tape in the opposite direction to the direction of the wire material, thereby solving the problem by using a tape layer (200).

[0054] As described above, a pair of cores (110, 120) form a tape layer (200) by winding the tape in opposite directions to each other. At this time, the direction in which the tape forming the tape layer (200) is wound and the angle at which the tape is wound are schematically illustrated in FIG. 3.

[0055] The core portion (100) is formed by twisting each other at a preset pitch, and then the tape is wound. At this time, the tape for forming the tape layer (200) has a predetermined width and is wound obliquely at a predetermined angle to wrap the core portion (100) composed of a wire. The width of the tape can be selected from the range of 5 mm to 20 mm. At this time, when selecting the tape, the width of the tape should not exceed 20 mm, which is the maximum limit for securing a stable structure of the large body. In addition, in the present invention, when generally winding the tape, a part of the width of the tape is wrapped in a shape in which it overlaps (overlap), and this kind of winding is called a wrap shape, and FIG. 3 illustrates a tape wound in such a wrap shape (the overlapping and lowered part is expressed by a single-dot chain line).

[0056] When the tape forming the tape layer (200) is wrapped around the core portion (100), the width of the tape and the angle at which the tape is wrapped satisfy mathematical expression 1.

[0057]

[0058] In mathematical expression 1, a is the width of the tape (mm) and b is the angle at which the tape is wrapped (deg).

[0059] When using a tape with a width of 8 mm, it is preferable that the tape be wrapped around the core portion (100) at an angle of 29 to 52 degrees with respect to the vertical central axis of the core when wrapping the tape according to mathematical formula 1. Since the width and angle of the tape must satisfy mathematical formula 1, if the width of the tape changes, the angle at which the tape is wrapped may also change.

[0060] Figure 4 is a drawing to explain an incorrect example of tape layer formation.

[0061] As described above, in the Ethernet cable according to the present invention, a pair of cores (110, 120) are formed to form a tape layer (200) in a direction opposite to the direction in which they are wound. In other words, the direction in which the core portion (100) is wound and the direction in which the tape is wound must be opposite to each other. The reason for this is to expect an LCL / LCTL improvement effect.

[0062] The situation when the tape is wound in the same direction as the winding direction of a pair of cores (110, 120) is exemplified through Fig. 4. That is, the tape layer (200) is formed in the same direction as the direction in which the core portion (100) is formed, and the bedding layer (300), the shielding layer (400), and the sheath layer (500) are sequentially formed to manufacture an Ethernet cable, and then the cross-section thereof is actually observed. That is, Fig. 4 corresponds to the case where both the twisted pair wire and the tape are formed in the S-stretch direction or the Z-stretch direction.

[0063] As shown, when forming a tape layer (200) on a core portion (100), if a pair of cores (110, 120) and the tape layer (200) are formed in the same direction, it can be seen that the formed shape of the tape layer (200) is not uniform, as shown in (a) to (c).

[0064] That is, a phenomenon occurred in which the tape partially penetrated into the groove between the cores of the large-diameter wire. More specifically, (a) is a phenomenon in which the end of the tape was rolled into the groove at the starting end, and (b) and (c) are cases in which grooves were formed on one or both sides due to tension.

[0065] As shown in (a) to (c), if the formation of the tape layer (200) has an uneven structure, it has a negative effect on the LCL / LCTL characteristics. Therefore, when manufacturing an Ethernet cable according to the present invention, the tape layer (200) must be formed by winding the tape in the opposite direction in which a pair of cores (110, 120) are formed.

[0066] It was experimentally confirmed that when an Ethernet cable was manufactured by forming a tape layer (200) by winding the tape in the opposite direction to the direction in which a pair of cores (110, 120) were wound, the non-uniform phenomenon as shown in (a) to (c) did not occur.

[0067] Figure 5 is a graph showing the results of LCL / LCTL evaluation according to the formation direction of the tape layer.

[0068] In this embodiment, Ethernet cables were manufactured when the winding direction of a pair of cores (110, 120) and the winding direction of the tape forming the tape layer (200) were in the same direction and when they were in opposite directions, and then the LCL characteristics and LCTL characteristics were observed for each and represented in a graph. The LCL / LCTL values ​​should be lower than the specification values ​​to indicate good characteristics.

[0069] LCL refers to a phenomenon in which common mode is converted to differential mode due to an unbalanced structure such as the length and outer diameter between cores, and attenuation and mode conversion occur simultaneously due to a section that causes a reflection signal and returns to the input (Return Loss). On the other hand, LCTL refers to a phenomenon in which the cause is similar to LCL, but the signal is output as is to the output terminal instead of returning to the input terminal (Insertion Loss).

[0070] LCL and LCTL are measures of the symmetry of a cable's structure. To suppress mode conversion, ensuring uniformity (symmetry) throughout the cable is essential. Furthermore, mode-converted signals can be perceived as noise at the receiver, interfering with data transmission and reducing transmission efficiency. Therefore, satisfying a certain level of LCL / LCTL values ​​is advantageous for high-speed and large-capacity data transmission.

[0071] (a) shows the results of evaluating the LCL characteristics according to frequency of a cable in which a pair of cores (110, 120) and a tape layer (200) are formed in the same direction along with the disclosed LCL specifications, and an Ethernet cable according to the present invention.

[0072] (b) shows the results of evaluating the LCTL characteristics according to the frequency of a cable in which a pair of cores (110, 120) and a tape layer (200) are formed in the same direction along with the published LCTL specifications, and an Ethernet cable according to the present invention.

[0073] Referring to (a) and (b), it can be seen that the Ethernet cable according to the present invention exhibits improved LCL / LCTL characteristics compared to a cable in which a pair of cores (110, 120) and a tape layer (200) are formed in the same direction, and satisfies the LCL / LCTL characteristics required for Class 1.

[0074] Figures 6 to 8 are graphs showing the results of LCL / LCTL evaluation according to the angle of the tape forming the tape layer.

[0075] As mentioned in the previous embodiment, in manufacturing an Ethernet cable according to the present invention, the tape wrapping the core portion (100) satisfies the mathematical expression 1 in its width and wrapping angle. Accordingly, in this embodiment, in order to compare when the width and angle of the tape satisfy and do not satisfy the mathematical expression 1, the LCL and LCTL characteristics were observed by varying the tape wrapping angle. At this time, the width a of the tape was applied equally at 8 mm for all cases.

[0076] In Fig. 6, the LCL and LCTL characteristics are shown in a graph after manufacturing a cable by setting the tape angle b to 15 degrees. In Fig. 7, the LCL and LCTL characteristics are shown in a graph after manufacturing a cable by setting the tape angle b to 40 degrees. In addition, in Fig. 8, the LCL and LCTL characteristics are shown in a graph after manufacturing a cable by setting the tape angle b to 60 degrees. The graphs expressed in the form of thick straight lines in Figs. 6 to 8 indicate values ​​according to the specifications of LCL and LCTL, respectively.

[0077] Referring to the graphs, the LCL and LCTL characteristics shown in Figures 6 and 8 are similar to the specifications and do not differ significantly. When the tape angle b is 60 degrees, the LCTL is satisfactory. However, the LCL / LCTL characteristics must satisfy both conditions.

[0078] On the other hand, it can be confirmed that the LCL and LCTL characteristics shown in Fig. 7 show values ​​that are significantly improved compared to the values ​​according to the specifications. Fig. 7 shows a case where the angle b of the tape is formed at 40 degrees, which falls within the range of 29 to 52 degrees, and it appears that both the LCL / LCTL characteristics show improved results.

[0079] As a result, the tape forming the tape layer (200) by mathematical expression 1 must be formed at an angle in the range of 29 to 52 degrees, but a cable including a tape layer (200) formed at an angle that does not satisfy mathematical expression 1, as shown in FIGS. 6 and 8, did not have improved LCL / LCTL characteristics. On the other hand, the Ethernet cable according to the present invention including a tape layer (200) formed at an angle that satisfies mathematical expression 1 not only has improved LCL / LCTL characteristics, but also satisfies the LCL / LCTL characteristics required by Class 1.

[0080] Class 1 requires high LCL / LCTL characteristics, and Class 2 requires high shielding characteristics. In the present invention, by forming a tape layer (200) in the opposite direction of the twisting direction of a pair of cores (110, 120), an Ethernet cable was manufactured that satisfies the LCL / LCTL characteristics required for Class 1 and also the shielding characteristics required for Class 2.

[0081] FIG. 9 is a flowchart illustrating a method for manufacturing a highly shielded Ethernet cable for a vehicle according to one embodiment of the present invention.

[0082] After forming a pair of cores (110, 120) including conductors (112, 122) and insulators (114, 124), the pair of cores (110, 120) are twisted in one direction to form a core portion (100) (S610). At this time, the direction in which the pair of cores (110, 120) are twisted may be either S-direction or Z-direction.

[0083] After forming the core portion (100), a tape layer (200) is formed in a form that wraps around the outer periphery of the core portion (100) (S620). At this time, the tape layer (200) may be a polymer-based tape, and is formed in a form that wraps around the core portion (100) in a direction opposite to the direction in which the pair of cores (110, 120) are twisted. That is, when a pair of cores (110, 120) are wound in the S-direction, the tape layer (200) is formed in the Z-direction, and when a pair of cores (110, 120) are wound in the Z-direction, the tape layer (200) is formed in the S-direction.

[0084] A bedding layer (300) is formed on the outer periphery of the tape layer (200) (S630), a shielding layer (400) is formed on the outer periphery of the bedding layer (300) (S640), and a sheath layer (500) is formed on the outer periphery of the shielding layer (400) (S650). At this time, the shielding layer (400) may include a first shielding layer (410) and a second shielding layer (420).

[0085] In manufacturing Ethernet cables, an extruder (not shown) is used to fill material into wires twisted at a certain pitch. The wires rotate as they enter the extruder. Consequently, extruding a certain amount of material into the groove between a pair of cores (110, 120) has been a very difficult task. However, the Ethernet cable according to the present invention solves this problem by forming a tape layer (200) on a pair of cores (110, 120).

[0086] In addition, since the tape layer (200) is formed by winding the tape in a direction opposite to the direction in which a pair of cores (110, 120) are wound, it is possible to form a tape layer (200) of uniform shape. This provides the advantage of a maximized LCL / LCTL improvement effect and high shielding.

[0087] Those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering its technical spirit or essential characteristics. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

Claims

1. A core portion formed by twisting a pair of cores containing an insulator that surrounds a conductor at a preset pitch; A tape layer formed by wrapping the outer periphery of the core portion with tape in the direction opposite to the direction in which the pair of cores are twisted; A bedding layer formed in a shape surrounding the above tape layer; A shielding layer formed in a shape surrounding the above bedding layer; and A highly shielded Ethernet cable for a vehicle, characterized in that it includes a sheath layer formed in a form that surrounds the shielding layer.

2. In paragraph 1, A highly shielded Ethernet cable for vehicles, characterized in that the conductor has a structure in which multiple conductor wires are arranged around a single central wire.

3. In paragraph 1, A highly shielded Ethernet cable for a vehicle, characterized in that the width of the tape and the angle at which the tape is wrapped satisfy the following formula: Here, a is the width of the tape, and b is the angle at which the tape is wrapped.

4. In paragraph 1, The width of the above tape ranges from 5 mm to 20 mm, A highly shielded Ethernet cable for vehicles, characterized in that the tape is wrapped to form an angle within a range calculated by the above formula based on the usage width based on the central axis of the core portion.

5. In paragraph 1, A highly shielded Ethernet cable for vehicles, characterized in that the above tape is selected from a group of polymer series tapes.

6. In paragraph 1, A highly shielded Ethernet cable for vehicles, characterized in that the core portion formed by twisting a pair of cores together has a preset pitch of 7 mm to 50 mm.

7. In paragraph 1, A highly shielded Ethernet cable for vehicles, characterized in that the tape wrapping the outer periphery of the core section described above is wound in a wrap shape in which a portion of the width of the tape overlaps.

8. A step of forming a core portion by twisting a pair of cores including an insulator wrapping a conductor in one direction at a preset pitch; A step of forming a tape layer by wrapping the tape in the opposite direction to the one direction on the outside of the core portion; A step of forming a bedding layer surrounding the tape layer; A step of forming a shielding layer surrounding the bedding layer; and A method for manufacturing a highly shielded Ethernet cable for a vehicle, characterized in that it comprises a step of forming a sheath layer surrounding the shielding layer.

9. In paragraph 8, A method for manufacturing a highly shielded Ethernet cable for a vehicle, characterized in that the width of the tape and the angle at which the tape is wrapped satisfy the following formula: Here, a is the width of the tape, and b is the angle at which the tape is wrapped.

10. In paragraph 8, The width of the above tape ranges from 5 mm to 20 mm, A method for manufacturing a highly shielded Ethernet cable for a vehicle, characterized in that the tape is wrapped to form an angle within a range calculated by the above formula based on the use width based on the central axis of the pair of cores.

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