Composite insulated high speed core wire

Abstract

The application relates to a combined insulated high-speed core wire, a first insulating layer is wrapped outside a first conductor and forms a first core wire together with the first conductor; a second insulating layer is wrapped outside a second conductor and forms a second core wire together with the second conductor; the first core wire and the second core wire are symmetrically arranged and form an inner core body together; a middle layer comprises a first middle layer wrapped outside the inner core body and a second middle layer wrapped outside the first middle layer in an extrusion mode; the first middle layer forms symmetrically arranged first and second hollow regions outside the first and second insulating layers. The wrapped first middle layer cooperates with the extruded second middle layer to form a double wrapping state for the inner core body, which improves the relative closeness of the positions of the first and second core wires, guarantees the overall coupling ratio of the middle layer and the insulating layer, avoids the problems that the first and second core wires in the inner core body are prone to loosening, deformation and parameter loss control, and causes product defects.

Description

Technical Field

[0001] This application relates to the field of high-speed cables, and in particular to combined insulated high-speed core wires. Background Technology

[0002] Traditional high-speed cables typically use differential pairs for signal transmission. Low-end products simply wrap a shielding layer around the two core wires, which is low in cost but has high attenuation. High-end products, on the other hand, usually wrap an additional inner sheath around the two core wires to flexibly control the spacing between the core wires. This is because the presence of the inner sheath can reduce the conductor spacing while keeping the overall cable impedance constant. Furthermore, since the electric field strength is greatest between the two conductors, shortening the conductor spacing can effectively reduce the overall attenuation of the cable.

[0003] There are two main types of sheathing structures in traditional high-speed cables: one uses wrapped tape as the sheathing, and the other uses extruded plastic. However, both types of sheathing have obvious and unavoidable inherent drawbacks.

[0004] For wrapped insulation, in structures with high coupling ratio requirements, the insulation thickness must be greater than the insulation thickness. However, due to severe bending and deformation of the wrapping tape, only a very thin layer of tape can be wrapped, resulting in the coupling ratio not meeting the requirements.

[0005] For extruded sheaths, when the wire is wrapped with the outer shielding layer and sheath layer, the insulated core wire is prone to loosening inside the sheath due to bending during the wrapping process. This can lead to uncontrollable SI parameters such as differential to common mode conversion and delay difference, affecting product yield. Utility Model Content

[0006] Therefore, it is necessary to provide a combined insulated high-speed core wire.

[0007] One embodiment of this application is a combined insulated high-speed core wire, which includes a wire pair, an insulation layer, and a middle sheath layer;

[0008] The wire pair includes a first conductor and a second conductor, and the insulating layer includes a first insulating layer and a second insulating layer;

[0009] The first insulating layer covers the first conductor and together with the first conductor forms the first core wire;

[0010] The second insulating layer covers the second conductor and together with the second conductor forms the second core wire;

[0011] The first core wire and the second core wire are symmetrically arranged and together form the inner core;

[0012] The inner lining layer includes a first inner lining layer wrapped around the inner core and a second inner lining layer that is extruded and covers the first inner lining layer.

[0013] The aforementioned combined insulated high-speed core wire, through the cooperation of wire pairs, insulation layers, and intermediate layers, features a first and second core wire designed as a differential pair, resulting in a faster data transmission frequency compared to single-wire transmission. Furthermore, the design incorporates a wrapped first intermediate layer in conjunction with an extruded second intermediate layer, creating a double-wrap structure around the inner core. This enhances the relative tightness of the first and second core wires while maintaining the overall coupling ratio between the intermediate layer and the insulation layer. This avoids issues such as loosening, deformation, and parameter malfunctions of the first and second core wires within the inner core, which can lead to product defects.

[0014] In some embodiments, the first inner core layer is disposed outside the inner core layer in a gap-wrapping manner.

[0015] In some embodiments, the first inner core layer is disposed outside the inner core layer in an overlapping wrapping manner.

[0016] In some embodiments, the overlap of the first layer is no more than 50%.

[0017] In some embodiments, the combined insulated high-speed core wire further includes a shielding layer, a first ground wire, and a second ground wire;

[0018] The shielding layer covers the outer layer of the second inner layer;

[0019] The first ground wire and the second ground wire are both located between the second inner layer and the shielding layer. The first ground wire and the second ground wire are symmetrically arranged and have the same symmetry plane as the first core wire and the second core wire.

[0020] In some embodiments, the combined insulated high-speed core wire further includes an outer sheath, a first ground wire, and a second ground wire;

[0021] The outer sheath covers the second inner sheath;

[0022] The first ground wire and the second ground wire are both located between the second middle layer and the outer layer. The first ground wire and the second ground wire are symmetrically arranged and have the same symmetry plane as the first core wire and the second core wire.

[0023] In some embodiments, the combined insulated high-speed core wire further includes a shielding layer covering the second inner layer;

[0024] Both the first ground wire and the second ground wire are located between the shielding layer and the outer layer.

[0025] In some embodiments, a third hollow region is provided between the shielding layer, the second ground wire, and the outer sheath;

[0026] There is a fourth hollow region between the shielding layer, the first ground wire and the outer layer.

[0027] In some embodiments, the first hollow region and the second hollow region are symmetrically arranged outside the first insulating layer and the second insulating layer.

[0028] In some embodiments, the total thickness of the first and second interlayers is greater than the thickness of either the first or the second insulating layer.

[0029] In some embodiments, the thickness of either the first or the second intermediate layer is the same as the thickness of the first or the second insulating layer. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the first embodiment of the combined insulated high-speed core wire described in this application.

[0032] Figure 2 for Figure 1 The illustrated embodiment is a cross-sectional view along the extension direction.

[0033] Figure 3 for Figure 2 Another schematic diagram of the embodiment shown.

[0034] Figure 4 for Figure 3 Another schematic diagram of the embodiment shown.

[0035] Figure 5 This is a schematic diagram of the structure of the second embodiment of the combined insulated high-speed core wire described in this application.

[0036] Figure 6 This is a structural schematic diagram of the third embodiment of the combined insulated high-speed core wire described in this application.

[0037] Reference numerals: Combined insulated high-speed core wire 100, first core wire 101, second core wire 102, wire pair 110, first conductor 111, second conductor 112, insulation layer 120, first insulation layer 121, second insulation layer 122, core hole 123, inner core 130, first hollow region 131, second hollow region 132, first symmetry plane 133, second symmetry plane 134, middle sheath 140, first middle sheath 141, second middle sheath 142, shielding layer 150, outer sheath 160, first ground wire 170, second ground wire 180, third hollow region 191, fourth hollow region 192, extension direction 200. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0040] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0043] This application discloses a combined insulated high-speed core wire, which includes some or all of the technical features of the following embodiments; that is, the combined insulated high-speed core wire includes some or all of the following structures. In one embodiment of this application, a combined insulated high-speed core wire includes a wire pair, an insulation layer, and a middle sheath layer; the wire pair includes a first conductor and a second conductor, the insulation layer includes a first insulation layer and a second insulation layer; the first insulation layer covers the first conductor and forms a first core wire together with the first conductor; the second insulation layer covers the second conductor and forms a second core wire together with the second conductor; the first core wire and the second core wire are symmetrically arranged and together form an inner core; the middle sheath layer includes a first middle sheath layer wrapped around the inner core, and a second middle sheath layer extruded and wrapped around the first middle sheath layer. The aforementioned combined insulated high-speed core wire, through the cooperation of wire pairs, insulation layers, and intermediate layers, employs two design elements: firstly, the first and second core wires are designed as differential pairs, resulting in a faster data transmission frequency compared to single-wire transmission; secondly, the design incorporates a wrapped first intermediate layer and an extruded second intermediate layer, creating a double-wrap structure around the inner core. This improves the relative tightness of the first and second core wires while ensuring the overall coupling ratio between the intermediate layer and the insulation layer, preventing issues such as loosening, deformation, and parameter malfunction of the first and second core wires within the inner core, which could lead to product defects. It should be noted that if the differential pairs are well-designed for symmetry and overall coupling ratio, the data transmission frequency can exceed 1Gbps or even 100Gbps. Therefore, data transmission lines using differential pairs can be called high-speed core wires or even ultra-high-speed core wires. The following section will further elaborate on this. Figures 1 to 5 The combined insulated high-speed core wire is described in detail below.

[0044] In some embodiments, a combined insulated high-speed core wire 100, such as... Figure 1 and Figure 2 As shown, it includes wire pairs 110, an insulating layer 120, and a middle sheath layer 140; combined with Figure 3 and Figure 4The wire pair 110 includes a first conductor 111 and a second conductor 112, and the insulating layer 120 includes a first insulating layer 121 and a second insulating layer 122. The first insulating layer 121 covers the first conductor 111 and together with the first conductor 111 forms a first core wire 101. The second insulating layer 122 covers the second conductor 112 and together with the second conductor 112 forms a second core wire 102. The first core wire 101 and the second core wire 102 are symmetrically arranged and together form an inner core 130. The middle sheath 140 includes a first middle sheath 141 wrapped around the inner core 130 and a second middle sheath 142 extrudedly wrapped around the first middle sheath 141. This design, through the cooperation of wire pair 110, insulation layer 120, and intermediate sheath layer 140, on the one hand, designs the first core wire 101 and the second core wire 102 as a differential wire pair, which allows for a data transmission frequency faster than single-wire transmission, exceeding 1Gbps or even 100Gbps, thus qualifying it as an ultra-high-speed core wire; on the other hand, the design of the wrapped first intermediate sheath layer 141 and the extruded second intermediate sheath layer 142 forms a double wrapping state for the inner core 130, improving both the first core wire 101 and the second core wire 102. The relatively tight position of the second core wire 102 ensures the overall coupling ratio between the middle liner 140 and the insulation layer 120, avoiding problems such as easy loosening, deformation, and parameter loss of the first core wire 101 and the second core wire 102 in the inner core 130, which can lead to product defects. In particular, the first middle liner 141 wrapped around the inner core 130 is firmly tied to the first core wire 101 and the second core wire 102 with a wrapping tape, so that the first core wire 101 and the second core wire 102 do not deform or shift.

[0045] In some embodiments, the first insulating layer 141 forms symmetrically arranged first hollow regions 131 and second hollow regions 132 outside the first insulating layer 121 and the second insulating layer 122. This structural design, ensuring the proper positioning of the symmetrical first hollow regions 131 and second hollow regions 132 with the first core wire 101 and second core wire 102, provides conditions for transporting air as the transmission medium, thereby helping to reduce the signal transmission attenuation value of the combined insulated high-speed core wire 100.

[0046] In each embodiment, the first conductor 111 and the second conductor 112 are essentially both conductors 110; they are identical. The names 111 and 112 are used for ease of distinction, meaning there are two conductors 110. For example, the conductor 110 is a single or multi-strand metal wire, and the material includes, but is not limited to, silver-plated copper, tin-plated copper, bare copper, silver-plated copper-clad steel, and silver-plated copper-clad aluminum. For example, the first conductor 111 and the second conductor 112 are conductors 110 produced in the same batch.

[0047] In this design, the first conductor 111 and the second conductor 112 serve as the core components of the wire pair 110. These two conductors 110 form the basis of the differential wire pair, providing the core carrier for high-speed data transmission between the first core wire 101 and the second core wire 102, thus ensuring the high-speed transmission characteristics of the combined insulated high-speed core wire 100. The high performance consistency of conductors 110 produced in the same batch ensures the parameter matching degree between the first core wire 101 and the second core wire 102, facilitating the maintenance of a stable overall coupling ratio and reducing parameter runaway problems caused by conductor differences. Diverse material choices, such as silver-plated copper, not only guarantee excellent conductivity to reduce transmission loss but also adapt to different application scenarios. Combined with the symmetrical first hollow region 131 and second hollow region 132, this further optimizes signal transmission attenuation performance and improves product reliability.

[0048] Similarly, in various embodiments, the first insulating layer 121 and the second insulating layer 122 are essentially both insulating layers 120, and are identical. The names 121 and 122 are used for ease of distinction; that is, the insulating layer 120 has two parts, respectively covering the first conductor 111 and the second conductor 112. The insulating layer 120 covers the conductor 110. As an example, the material of the insulating layer 120 includes, but is not limited to, polyethylene, foamed polyethylene, polypropylene, foamed polypropylene, perfluoroethylene propylene, foamed perfluoroethylene propylene, polytetrafluoroethylene, foamed polytetrafluoroethylene, microporous polytetrafluoroethylene, and fusible polytetrafluoroethylene. As an example, the first insulating layer 121 and the second insulating layer 122 are integrally formed. As an example, a plurality of through holes are provided at the position where the first insulating layer 121 and the second insulating layer 122 are integrally disposed to form the first hollow region 131 and the second hollow region 132. That is, each of the through holes forms a symmetrically arranged first hollow region 131 and second hollow region 132 outside the first insulating layer 121 and the second insulating layer 122. As an example, a plurality of micropores are provided in the first insulating layer 121 and the second insulating layer 122 to form a core structure. This provides the conditions for transporting air as a transmission medium, thereby helping to reduce the signal transmission attenuation value of the combined insulated high-speed core wire.

[0049] In this design, the first insulating layer 121 and the second insulating layer 122 serve as two parts of the insulating layer 120, respectively covering the first conductor 111 and the second conductor 112 to form the first core wire 101 and the second core wire 102, providing basic insulation protection for the differential pair. The integrated design enhances structural stability, ensuring the symmetrical distribution of the first core wire 101 and the second core wire 102 within the inner core 130, and maintaining a stable coupling ratio between the inner sheath 140 and the insulating layer 120. The through-hole in the central integrated position forms symmetrical first hollow regions 131 and second hollow regions 132, which, combined with the properties of air, help reduce signal transmission attenuation of the combined insulated high-speed core wire 100. The selection of various materials, such as foamed polyethylene, can adapt to different scenarios. Combined with the double wrapping of the inner sheath 140, this further reduces the risk of loosening and deformation of the first core wire 101 and the second core wire 102, ensuring parameter stability and improving product reliability.

[0050] In each embodiment, the first core wire 101 and the second core wire 102 are symmetrically arranged and together form the inner core 130, such as... Figure 4 As shown, the first core wire 101 and the second core wire 102 are symmetrically arranged with respect to the first symmetry plane 133 to ensure data transmission performance. In various embodiments, the first hollow region 131 and the second hollow region 132 are symmetrically arranged with respect to the second symmetry plane 134 to ensure data transmission performance. As an example, the first hollow region 131 and the second hollow region 132 are empty, that is, the interior of the first hollow region 131 and the second hollow region 132 is filled with air. Because air is the best transmission medium, air is introduced into the first hollow region 131 and the second hollow region 132 between the first inner layer 141 and the inner core 130 as a transmission medium to reduce wire attenuation.

[0051] This design, with the first core wire 101 and the second core wire 102 symmetrically arranged relative to the first symmetry plane 133 to form the inner core 130, ensures the structural stability of the differential pair, provides a symmetrical basis for high-speed data transmission, and ensures stable data transmission performance. The first hollow region 131 and the second hollow region 132 are symmetrical relative to the second symmetry plane 134, and the interior is empty, using air as the transmission medium. Utilizing the excellent transmission characteristics of air, the signal transmission attenuation value of the combined insulated high-speed core wire 100 is significantly reduced. Moreover, this symmetrical design, combined with the air medium, not only works synergistically with the wrapped first inner liner 141 and the extruded second inner liner 142 to maintain the overall coupling ratio between the inner liner 140 and the insulation layer 120, but also avoids parameter imbalance caused by structural asymmetry, further improving the reliability of high-speed transmission.

[0052] It should be noted that the middle layer 140 has different shapes and connection methods depending on the molding process. In various embodiments, the first middle layer 141 wraps around the inner core 130, and the second middle layer 142 is extruded and covers the first middle layer 141. Therefore, as an example, the first middle layer 141 has a wrapped shape, and the first middle layer 141 is tightly pressed with the first insulating layer 121 and the second insulating layer 122 in the inner core 130, which improves the relative tightness of the position of the first core wire 101 and the second core wire 102, and avoids problems such as easy loosening and deformation of the first core wire 101 and the second core wire 102 in the inner core 130, which would lead to product defects. The second middle layer 142 is a structural component formed by hardening a soft material. Before molding, the second inner lining layer 142 is bonded to the first inner lining layer 141, and after molding, it is also bonded to the first inner lining layer 141. In this way, when the first inner lining layer 141 is molded, the wrapping tape therein firmly binds the first core wire 101 and the second core wire 102. Without increasing the thickness of the wrapping tape of the first inner lining layer 141, the second inner lining layer 142 uses extrusion molding to ensure the overall thickness of the inner lining layer 140, improve the wrapping effect of the first inner lining layer 141, and overcome the problem of poor bending performance caused by excessively thick wrapping tape of the first inner lining layer 141. This ensures the overall coupling ratio between the inner lining layer 140 and the insulation layer 120, and avoids problems such as product defects caused by parameter loss due to wire bending in the first core wire 101 and the second core wire 102 in the inner core 130. Furthermore, the first inner sheath 141 has a wrapping shape and wraps around the inner core 130, forming an appropriate deformation structure on the outside of the inner core 130. This allows for the release of internal stress generated when the inner core 130 is bent using micro-deformation of the tape, especially the internal stress generated when the first core wire 101 and the second core wire 102 in the inner core 130 are bent. Because this micro-deformation generated by the wrapping structure occurs on the entire outer periphery of the inner core 130, it has little impact on the symmetry of the first core wire 101 and the second core wire 102 in the inner core 130, and it does not linearly superimpose with the wire length. Therefore, it has little impact on the overall SI parameters, and there are no hidden dangers after releasing the internal stress of the wire bending. Therefore, this design gives the combined insulated high-speed core wire 100 a matching double-layer inner sheath structure, resulting in a stable wire structure and advantages such as good attenuation, differential-to-common-mode conversion, and delay difference, i.e., excellent SI performance.

[0053] The wrapping can have different overlapping methods. In some embodiments, the first inner lining layer 141 is disposed outside the inner core 130 with a gap wrapping method. Alternatively, in some embodiments, the first inner lining layer 141 is disposed outside the inner core 130 with an overlapping wrapping method. In some embodiments, the overlap of the first inner lining layer 141 is no more than 50%. A 50% overlap rate means that the first inner lining layer 141 on the entire surface consists of two layers of wrapping tape, that is, the middle wrapping tape overlaps with the left and right sides by 50%, resulting in a full overlap without gaps and a relatively flat outer surface. In some embodiments, the overlap of the first inner lining layer 141 is 40% to 50%. The wrapping can also have different angles. As an example, the first inner lining layer 141 is wrapped around the inner core 130 at an angle of 40 degrees to 70 degrees. In some embodiments, the first inner lining layer 141 is wrapped around the inner core 130 at an angle of 50 degrees to 65 degrees.

[0054] This design offers two advantages. First, the versatility of gap wrapping and overlapping wrapping allows for adaptation to different scenarios. Gap wrapping provides a buffer space for the inner core 130, which, combined with the air medium in the first hollow region 131 and the second hollow region 132, facilitates heat dissipation and attenuation control during signal transmission. Overlap wrapping, through interlayer stacking, enhances the binding force on the core 130, further improving the positional tightness of the first core wire 101 and the second core wire 102, reducing the risk of loosening. Second, controlling the overlap to no more than 50%, especially within the range of 40% to 50%, ensures the stability of the wrapping through moderate overlap, preventing deformation of the inner core 130. It also ensures that the first inner lining layer 141 has no gaps and a relatively flat outer surface, while preventing uneven material accumulation caused by excessive overlap. This ensures uniform thickness of the first inner lining layer 141, maintains a stable overall coupling ratio between the inner lining layer 140 and the insulation layer 120, and reduces parameter runaway issues. On the other hand, the optimized design of the wrapping angle is equally crucial. An angle ranging from 40 to 70 degrees, especially from 50 to 65 degrees, allows the first inner liner 141 to form uniform tension during wrapping, tightly fitting the symmetrical structure of the inner core 130. This not only preserves the symmetry between the first hollow region 131 and the second hollow region 132 but also strengthens the fixation of the differential wire pairs. This angle design, combined with the wrapping method and the extruded second inner liner 142, forms a dual-stabilizing structure, ultimately ensuring the stability and low attenuation characteristics of the combined insulated high-speed core wire 100 in high-speed data transmission.

[0055] As an example, the first inner layer is located outside the insulating layer 120, has a racetrack-shaped cross-section, and is made of materials including but not limited to polyethylene, foamed polyethylene, polypropylene, foamed polypropylene, perfluoroethylene propylene, foamed perfluoroethylene propylene, polytetrafluoroethylene, foamed polytetrafluoroethylene, microporous polytetrafluoroethylene, and fusible polytetrafluoroethylene. As an example, the second inner layer is located outside the first inner layer, has a racetrack-shaped cross-section, and is made of materials including but not limited to any one of polyethylene, foamed polyethylene, polypropylene, foamed polypropylene, perfluoroethylene propylene, foamed perfluoroethylene propylene, polytetrafluoroethylene, foamed polytetrafluoroethylene, microporous polytetrafluoroethylene, and fusible polytetrafluoroethylene.

[0056] This design, with the first and second intermediate layers 141 and 142 featuring a racetrack-shaped cross-section, and the first intermediate layer 141 located outside the insulation layer 120 and the second intermediate layer 142 located outside the first intermediate layer 141, adapts to the symmetrical structure of the inner core 130. This enhances the stability of the wrapping of the first core wire 101 and the second core wire 102, maintaining their relative positions to ensure the overall coupling ratio. Furthermore, the use of various materials such as polyethylene and expanded polytetrafluoroethylene allows for optimization of insulation and protection performance according to requirements. Combined with the double-wrap structure, this improves the inner core 130's resistance to loosening and deformation while preventing parameter runaway. Simultaneously, the racetrack-shaped cross-section design does not disrupt the symmetry of the first hollow region 131 and the second hollow region 132, ensuring air medium transmission conditions and helping to reduce signal transmission attenuation in the combined insulated high-speed core wire 100, thus improving high-speed transmission reliability.

[0057] To enhance the protective effects of the intermediate layer 140, such as physical constraint and isolation, in some embodiments, the total thickness of the first intermediate layer 141 and the second intermediate layer 142 is greater than the thickness of either the first insulating layer 121 or the second insulating layer 122. That is, for both the first insulating layer 121 and the second insulating layer 122, the maximum thickness of the two insulating layers 120 is less than the total thickness of the first intermediate layer 141 and the second intermediate layer 142. For example, the thickness of the first insulating layer 121 is the same as the thickness of the second insulating layer 122. In some embodiments, the thickness of either the first intermediate layer 141 or the second intermediate layer 142 is the same as the thickness of both the first insulating layer 121 and the second insulating layer 122.

[0058] This design, through a specific matching relationship between the thickness of the first and second intermediate layers 141 and 142 and the thickness of the first and second insulating layers 121 and 122, provides multiple guarantees for the performance optimization of the combined insulated high-speed core wire 100. On the one hand, when the total thickness of the first and second intermediate layers 141 and 142 is greater than the thickness of either the first or second insulating layer 121, this design significantly strengthens the physical constraint and isolation capability of the intermediate layer 140. The thicker double-wrap structure can form a stronger binding force on the inner core 130, further improving the positional tightness of the first core wire 101 and the second core wire 102, effectively resisting core wire loosening or deformation caused by external stress, and structurally avoiding problems such as coupling ratio imbalance and parameter runaway caused by core wire displacement. In addition, the increase in total thickness does not destroy the symmetrical structure of the first hollow region 131 and the second hollow region 132, and can still retain the advantage of air as a transmission medium. Together with the enhanced constraint, it maintains low signal attenuation characteristics while ensuring structural stability.

[0059] To enhance the shielding effect and strengthen the anti-interference advantage of electromagnetic shielding for differential signals, in some embodiments, such as Figure 5 As shown, the combined insulated high-speed core wire 100 further includes a shielding layer 150, a first ground wire 170, and a second ground wire 180; the shielding layer 150 covers the second intermediate layer 142; the first ground wire 170 and the second ground wire 180 are both located between the second intermediate layer 142 and the shielding layer 150, the first ground wire 170 and the second ground wire 180 are symmetrically arranged, and have the same symmetry plane as the first core wire 101 and the second core wire 102.

[0060] This design serves two purposes. First, the shielding layer 150 covers the second inner layer 142, forming an electromagnetic shielding barrier that effectively blocks external electromagnetic interference signals from entering the inner core 130. This prevents signal distortion caused by environmental interference during high-speed transmission of the differential pair's first core 101 and second core 102, strengthening the protection of differential signals and providing a cleaner electromagnetic environment for high-speed data transmission. This significantly improves the anti-interference capability and transmission stability of the combined insulated high-speed core 100. Second, the first ground wire 170 and the second ground wire 180 are located between the second inner layer 142 and the shielding layer 150, and share a symmetrical plane with the first core 101 and second core 102. This symmetrical arrangement maintains the overall structural symmetry and allows interference signals captured by the shielding layer 150 to be exported through grounding, further reducing the impact of interference on the differential pair. Meanwhile, the symmetrically distributed ground wires prevent parameter shifts caused by structural imbalance. Combined with the double-wrapping effect of the inner sheath 140, this ensures the relative positional stability of the first core wire 101 and the second core wire 102, maintaining a stable overall coupling ratio between the inner sheath 140 and the insulation layer 120, and reducing the risk of parameter runaway. Furthermore, this design does not disrupt the symmetrical structure and air medium conditions of the first hollow region 131 and the second hollow region 132. While strengthening shielding and anti-interference, it retains the advantage of air reducing signal transmission attenuation. These three elements, along with the wire pair 110, insulation layer 120, and inner sheath 140, work synergistically to maintain high-speed transmission and structural stability, while also compensating for anti-interference shortcomings through electromagnetic shielding and grounding design, comprehensively improving the reliability and applicability of the combined insulated high-speed core wire 100.

[0061] To enhance protection, in some embodiments, such as Figure 5 As shown, the combined insulated high-speed core wire 100 further includes an outer sheath layer 160, a first ground wire 170, and a second ground wire 180; the outer sheath layer 160 covers the second middle sheath layer 142; the first ground wire 170 and the second ground wire 180 are both located between the second middle sheath layer 142 and the outer sheath layer 160, and the first ground wire 170 and the second ground wire 180 are symmetrically arranged and have the same symmetry plane as the first core wire 101 and the second core wire 102. In some embodiments, the combined insulated high-speed core wire 100 further includes a shielding layer 150 covering the second middle sheath layer 142; the first ground wire 170 and the second ground wire 180 are both located between the shielding layer 150 and the outer sheath layer 160, and the shielding layer 150 can also enhance the grounding effect of the ground wires including the first ground wire 170 and the second ground wire 180.

[0062] This design serves two purposes. First, the outer sheath 160 covers the second inner sheath 142, forming an outer protective barrier that effectively resists external mechanical wear, compression, and environmental erosion. This provides additional protection for the core structure, including the inner core 130 and the inner sheath 140, reducing the risk of core wire loosening, deformation, or parameter abnormalities caused by external damage, thus extending the product's lifespan. Second, the first ground wire 170 and the second ground wire 180 are symmetrically positioned between the second inner sheath 142 and the outer sheath 160, or between the shielding layer 150 and the outer sheath 160, sharing a symmetrical plane with the first core wire 101 and the second core wire 102. This maintains the overall structural symmetry, preventing coupling ratio fluctuations due to imbalance, and allows potential interference signals to be discharged through grounding, reducing the impact on differential pairs. Furthermore, when used in conjunction with the shielding layer 150, the grounding effect is enhanced, allowing electromagnetic interference captured by the shielding layer 150 to be discharged more efficiently through the ground wire, further improving anti-interference capabilities. Meanwhile, the design does not disrupt the symmetrical structure and air medium conditions of the first hollow region 131 and the second hollow region 132. While strengthening protection and anti-interference, it retains the advantage of air reducing signal transmission attenuation. It works in synergy with the wire pair 110, insulation layer 120 and middle sheath 140 to comprehensively improve the reliability of the combined insulated high-speed core wire 100.

[0063] To increase the proportion of air-filled portions, in some embodiments, the combined insulated high-speed core wire 100, as... Figure 6 As shown, with Figure 5 The difference in the illustrated embodiment is that the combined insulated high-speed core wire 100 has a hollow core hole 123 in the insulation layer 120, and the first insulation layer 121 and the second insulation layer 122 are symmetrically arranged, that is, the core holes 123 of the first insulation layer 121 and the second insulation layer 122 are symmetrically arranged. This structural design helps to increase the proportion of air-filled portions in the first core wire 101 and the second core wire 102, which enhances protection and anti-interference while further improving the advantage of air in reducing signal transmission attenuation.

[0064] In some embodiments, a third hollow region 191 is formed between the shielding layer 150, the second ground wire 180, and the outer sheath layer 160; a fourth hollow region 192 is formed between the shielding layer 150, the first ground wire 170, and the outer sheath layer 160. As an example, the third hollow region 191 and the fourth hollow region 192 are empty, meaning they are filled with air. Similarly, introducing air as a transmission medium in this way helps reduce wire attenuation.

[0065] This design, on the one hand, utilizes air as a medium in the third hollow region 191 between the shielding layer 150, the second ground wire 180, and the outer sheath 160, and the fourth hollow region 192 between the shielding layer 150, the first ground wire 170, and the outer sheath 160. This design continues the advantage of the first hollow region 131 and the second hollow region 132 in using air to reduce attenuation, further reducing signal transmission loss of the combined insulated high-speed core wire 100. On the other hand, their symmetrical distribution matches the symmetrical structure of the first core wire 101 and the second core wire 102, maintaining overall structural balance and ensuring the relative position stability of the first core wire 101 and the second core wire 102. Simultaneously, the air regions provide buffer space for the ground wire and the shielding layer 150, reducing the impact of external stress on the internal structure. Combined with the protective function of the outer sheath 160, this enhances resistance to deformation and loosening, prevents parameter runaway, and works synergistically with other structures to improve the reliability of high-speed transmission.

[0066] As an example, the combined insulated high-speed core wire 100 adopts a wrapping structure as the first inner sheath 141. The wrapping characteristics are used to firmly bind the two core wires, the first core wire 101 and the second core wire 102, solving the problem of easy loosening of the internal insulation core wires in a simple extruded inner sheath structure. Furthermore, an extruded second inner sheath 142 is wrapped around the first inner sheath 141. The second inner sheath 142 increases the overall coupling ratio. In conjunction with this, the total thickness of the inner sheath 140 is greater than the thickness of either the first insulation layer 121 or the second insulation layer 122. This effectively solves the defect of a single-layer wrapping inner sheath being too thick and prone to deformation, resulting in a large change in wire bending impedance. Moreover, the double-layer inner sheath structure has good attenuation, stable wire structure, and excellent SI performance such as differential to common mode conversion and delay difference.

[0067] It should be noted that other embodiments of this application also include, implementable combined insulated high-speed core wires formed by combining the technical features of the above embodiments.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A composite insulated high-speed core wire (100), characterized in that, It includes wire pairs (110), insulation layer (120) and middle liner (140); The wire pair (110) includes a first conductor (111) and a second conductor (112), and the insulating layer (120) includes a first insulating layer (121) and a second insulating layer (122). The first insulating layer (121) covers the first conductor (111) and together with the first conductor (111) forms the first core wire (101). The second insulating layer (122) covers the second conductor (112) and together with the second conductor (112) forms the second core wire (102). The first core wire (101) and the second core wire (102) are symmetrically arranged and together form the inner core (130). The inner lining layer (140) includes a first inner lining layer (141) wrapped around the inner core (130) and a second inner lining layer (142) extruded over the first inner lining layer (141).

2. The combined insulated high-speed core wire (100) according to claim 1, characterized in that, The first inner layer (141) is disposed outside the inner core (130) in a gap-wrapping manner.

3. The combined insulated high-speed core wire (100) according to claim 1, characterized in that, The first inner layer (141) is disposed outside the inner core (130) in an overlapping wrapping manner.

4. The combined insulated high-speed core wire (100) according to claim 3, characterized in that, The overlap of the first intermediate layer (141) is no more than 50%.

5. The combined insulated high-speed core wire (100) according to claim 1, characterized in that, The combined insulated high-speed core wire (100) also includes a shielding layer (150), a first ground wire (170) and a second ground wire (180). The shielding layer (150) covers the second inner layer (142); The first ground wire (170) and the second ground wire (180) are both located between the second inner layer (142) and the shielding layer (150). The first ground wire (170) and the second ground wire (180) are symmetrically arranged and have the same symmetry plane as the first core wire (101) and the second core wire (102).

6. The combined insulated high-speed core wire (100) according to claim 1, characterized in that, The combined insulated high-speed core wire (100) also includes an outer sheath (160), a first ground wire (170) and a second ground wire (180). The outer sheath (160) covers the second inner sheath (142); The first ground wire (170) and the second ground wire (180) are both located between the second middle layer (142) and the outer layer (160). The first ground wire (170) and the second ground wire (180) are symmetrically arranged and have the same symmetry plane as the first core wire (101) and the second core wire (102).

7. The combined insulated high-speed core wire (100) according to claim 6, characterized in that, The combined insulated high-speed core wire (100) also includes a shielding layer (150) covering the second inner lining layer (142). The first ground wire (170) and the second ground wire (180) are both located between the shielding layer (150) and the outer layer (160).

8. The combined insulated high-speed core wire (100) according to claim 7, characterized in that, There is a third hollow region (191) between the shielding layer (150), the second ground wire (180) and the outer sheath (160). There is a fourth hollow region (192) between the shielding layer (150), the first ground wire (170) and the outer sheath (160).

9. The combined insulated high-speed core wire (100) according to claim 1, characterized in that, The first inner layer (141) forms a first hollow region (131) and a second hollow region (132) symmetrically arranged outside the first insulating layer (121) and the second insulating layer (122).

10. The combined insulated high-speed core wire (100) according to any one of claims 1 to 9, characterized in that, The total thickness of the first intermediate layer (141) and the second intermediate layer (142) is greater than the thickness of either the first insulating layer (121) or the second insulating layer (122).

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