A cable connection structure

Abstract

The application discloses a cable connection structure and relates to the technical field of cable connection.The cable connection structure comprises a double-core coaxial cable, a first single-core cable and a second single-core cable and a transition assembly.The double-core coaxial cable comprises two inner conductors arranged at intervals and a double-core shielding layer wrapping the two inner conductors.The first single-core cable comprises a first wire core and a first shielding layer wrapping the first wire core.The second single-core cable comprises a second wire core and a second shielding layer wrapping the second wire core.The transition assembly comprises two transition conductors arranged at intervals and a transition shell wrapping the two transition conductors.The corresponding ends of the two inner conductors are connected to the first wire core and the second wire core through the two transition conductors, and the double-core shielding layer, the first shielding layer and the second shielding layer are connected to the transition shell.The cable connection structure can realize broadband transition of the double-core coaxial cable to the two single-core cables, reduce impedance discontinuity in the transition area, and improve high-speed signal transmission performance and cable layout flexibility.

Description

Technical Field

[0001] This invention relates to the field of cable connection technology, and more specifically, to a cable connection structure. Background Technology

[0002] With the continuous improvement of high-speed interconnect speeds, cable structures must simultaneously meet multiple performance requirements, including high-density wiring near the chip, low-loss transmission at the chip's far end, and excellent bending reliability. Furthermore, in servers, high-speed differential signals typically need to be transmitted and transferred within a limited space via cable assemblies. The geometry, shielding structure, and impedance continuity of the cable assembly in transition areas have a significant impact on signal integrity.

[0003] Currently, the industry is shifting towards a connection structure that uses thin-diameter dual-core coaxial cables to connect thick-diameter dual-core coaxial cables for signal transmission. Thin-diameter dual-core coaxial cables can be used near connectors or high-density ports to meet high-density deployment requirements; thick-diameter dual-core coaxial cables can be used for longer-distance transmission to reduce cable loss. However, this solution is still limited to a dual-core shared cable structure, making it difficult to meet the needs of flexible remote deployment. Furthermore, due to the inherent characteristics of dual-core shared cables, this type of cable connection structure suffers from problems such as bend sensitivity and significant mode conversion during actual connection, resulting in poor signal transmission performance. Summary of the Invention

[0004] The purpose of this invention is to provide a cable connection structure that enables a broadband transition from a two-core coaxial cable to two single-core cables, reduces impedance discontinuities in the transition area, and improves high-speed signal transmission performance and cable layout flexibility.

[0005] An embodiment of the present invention provides a technical solution: A cable connection structure, comprising: A dual-core coaxial cable includes two spaced inner conductors forming a differential pair, an intermediate insulation layer wrapping the two inner conductors, and a dual-core shielding layer wrapping the intermediate insulation layer. The first single-core cable includes a first core, a first insulation layer wrapping the first core, and a first shielding layer wrapping the first insulation layer. The second single-core cable includes a second core, a second insulation layer that wraps around the second core, and a second shielding layer that wraps around the second insulation layer; The transition assembly includes two spaced-apart transition conductors, an insulating filler enclosing the two transition conductors, and a transition shell enclosing the insulating filler. The corresponding ends of the two inner conductors are respectively connected to the first core and the second core through the two transition conductors, and the dual-core shielding layer, the first shielding layer and the second shielding layer are all connected to the transition shell.

[0006] In an optional embodiment, the transition shell is provided with a main channel, a first channel and a second channel, with one end of the first channel and the second channel respectively connected to one end of the main channel at an angle to form a Y-shaped cavity structure; The main channel is circumferentially wrapped around the dual-core shielding layer at one end away from the first and second channels, and one end of each of the two transition conductors is connected to the two inner conductors respectively in the main channel; The first channel is circumferentially wrapped around the first shielding layer at one end away from the main channel, and one of the transition conductors extends into the first channel at one end away from the inner conductor and connects to the first wire core. The second channel, at one end away from the main channel, circumferentially wraps the second shielding layer, and the other transition conductor, at one end away from the inner conductor, extends into the second channel and connects to the second wire core.

[0007] In an optional embodiment, the portions of the two transition conductors within the main channel are coaxially connected to their respective inner conductors; and / or, One of the transition conductors, with one end facing away from the inner conductor, is coaxially connected to the first core, and the other transition conductor, with one end facing away from the inner conductor, is coaxially connected to the second core.

[0008] In an optional embodiment, the insulating filler includes a first part, a second part, and a third part. The first part wraps two of the transition conductors within the main channel. The second part is connected to the first part and wraps one of the transition conductors within the first channel. The third part is connected to the first part and wraps the other transition conductor within the second channel.

[0009] In an optional embodiment, the transition conductor includes a first connecting segment, an intermediate segment, and a second connecting segment connected in sequence. The first connecting segment and the second connecting segment are both arranged at an angle to the intermediate segment. The first connecting segment is coaxially connected to one of the inner conductors. The second connecting segment is coaxially connected to the first wire core, and the middle segment is located within the first channel; or, the second connecting segment is coaxially connected to the second wire core, and the middle segment is located within the second channel.

[0010] In an optional embodiment, the first connecting segment and the second connecting segment of the two transition conductors are arranged side by side, and the middle segment of the two is arranged at an angle.

[0011] In an optional embodiment, the main channel includes a main wrapping section, a main contraction section, and a main transition section connected in sequence. The main wrapping section circumferentially wraps the dual-core shielding layer. The main contraction section gradually contracts from one end connected to the main wrapping section to one end connected to the main transition section. The end of the main transition section away from the main contraction section is connected to the first channel and the second channel, respectively.

[0012] In an optional embodiment, one end of each of the two transition conductors is connected to one of the two inner conductors within the main contraction section.

[0013] In an optional embodiment, the first channel includes a first wrapping segment, a first contraction segment, and a first transition segment connected in sequence. The first wrapping segment circumferentially wraps the first shielding layer. The first contraction segment gradually contracts from one end connected to the first wrapping segment to one end connected to the first transition segment. The end of the first transition segment away from the first contraction segment is connected to the main channel; and / or, The second channel includes a second wrapping section, a second contraction section, and a second transition section connected in sequence. The second wrapping section circumferentially wraps the second shielding layer. The second contraction section gradually contracts from one end connected to the second wrapping section to one end connected to the second transition section. The end of the second transition section away from the second contraction section is connected to the main channel.

[0014] In an optional embodiment, the transition conductor located within the first channel has its end facing away from the inner conductor connected to the first core within the first contraction section; and / or, The transition conductor located in the second channel has its end facing away from the inner conductor connected to the first core within the second contraction section.

[0015] Compared to existing technologies, the cable connection structure provided by this invention uses a transition component to connect a dual-core coaxial cable to a first single-core cable and a second single-core cable, achieving a branching transition of the differential pair of the dual-core coaxial cable. This allows for independent transmission to the remote end via two single-core cables, meeting the needs of flexible remote deployment. Furthermore, the core diameters of the two single-core cables can be flexibly selected, better meeting the requirements for low-loss transmission at the remote end. Since the shielding layers of the two single-core cables are independent, electromagnetic isolation is ensured in the bending area during the transition between the first and second cores, allowing the two single-core cables to bend independently, thereby eliminating phase difference and mode conversion problems caused by bending. Therefore, the beneficial effects of the cable connection structure provided by this invention include: enabling a wideband transition from a dual-core coaxial cable to two single-core cables, reducing impedance discontinuities in the transition area, improving high-speed signal transmission performance, and enhancing cable deployment flexibility. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the cable connection structure provided in the first embodiment of the present invention; Figure 2 A cross-sectional view of a cable connection structure provided in the first embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of region A in the middle; Figure 4 This is a schematic diagram of the cable connection structure provided in the second embodiment of the present invention; Figure 5 This is a partial structural diagram of the cable connection structure provided in the second embodiment of the present invention.

[0018] Icons: 100 - Cable connection structure; 110 - Two-core coaxial cable; 111 - Inner conductor; 112 - Intermediate insulation layer; 113 - Two-core shielding layer; 114 - Two-core insulating sheath; 120 - First single-core cable; 121 - First conductor; 122 - First insulation layer; 123 - First shielding layer; 124 - First insulating sheath; 130 - Second single-core cable; 131 - Second conductor; 132 - Second insulation layer; 133 - Second shielding layer; 134 - Second insulating sheath; 140 - Transition assembly; 141 - Transition conductor; 1411 - First connecting section; 1412 - Intermediate section; 1413-Second connecting section; 142-Edge filler; 1421-First part; 1422-Second part; 1423-Third part; 143-Transition shell; 1431-Base; 1432-Top cover; 144-Main channel; 1441-Main wrapping section; 1442-Main shrinking section; 1443-Main transition section; 145-First channel; 1451-First wrapping section; 1452-First shrinking section; 1453-First transition section; 146-Second channel; 1461-Second wrapping section; 1462-Second shrinking section; 1463-Second transition section. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] Example Please refer to the following: Figure 1 , Figure 2 and Figure 3 , Figure 1 The diagram shown is a structural schematic of the cable connection structure 100 provided in the first embodiment of this application. Figure 2 The image shown is a cross-sectional view of the cable connection structure 100. Figure 3 As shown Figure 2 An enlarged schematic diagram of region A in the middle.

[0027] The cable connection structure 100 provided in this embodiment includes a dual-core coaxial cable 110, a first single-core cable 120, a second single-core cable 130, and a transition component 140.

[0028] The dual-core coaxial cable 110 includes two inner conductors 111, an intermediate insulation layer 112, a dual-core shielding layer 113, and a dual-core insulating outer sheath 114. The two inner conductors 111 are arranged side by side to form a differential pair. The intermediate insulation layer 112 wraps around the two inner conductors 111. The dual-core shielding layer 113 wraps around the intermediate insulation layer 112. The dual-core insulating outer sheath 114 wraps around the dual-core shielding layer 113.

[0029] The first single-core cable 120 includes a first core 121, a first insulation layer 122, a first shielding layer 123, and a first insulating sheath 124. The first insulation layer 122 wraps the first core 121, the first shielding layer 123 wraps the first insulation layer 122, and the first insulating sheath 124 wraps the first shielding layer 123.

[0030] The second single-core cable 130 includes a second core 131, a second insulation layer 132, a second shielding layer 133, and a second insulating sheath 134. The second insulation layer 132 wraps around the second core 131, the second shielding layer 133 wraps around the first insulation layer 122, and the second insulating sheath 134 wraps around the second shielding layer 133.

[0031] The transition assembly 140 includes two transition conductors 141, an insulating filler 142, and a transition shell 143. The insulating filler 142 encloses the two transition conductors 141, and the transition shell 143 encloses the insulating filler 142.

[0032] The corresponding ends of the two inner conductors 111 are connected to the first core 121 and the second core 131 respectively through two transition conductors 141, realizing the branching and transition of the two inner conductors 111. The double-core shielding layer 113, the first shielding layer 123 and the second shielding layer 133 are all connected to the transition shell 143, establishing a complete and continuous shielding structure from the double-core shielding layer 113 to the first shielding layer 123 and the second shielding layer 133.

[0033] The dual-core coaxial cable 110 facilitates high-density wiring in areas near the processor-side connector. The inner conductor 111 of the dual-core coaxial cable 110 has a thinner diameter, which can suppress the generation of high-order modes at extremely high frequencies. In this application, the dual-core coaxial cable 110 is connected to the first single-core cable 120 and the second single-core cable 130 via a transition component 140. The first single-core cable 120 and the second single-core cable 130 transmit independently to the remote end, meeting the needs of flexible remote deployment. Furthermore, the diameters of the first core 121 and the second core 131 can be flexibly selected, better meeting the requirements of low-loss transmission at the remote end.

[0034] Furthermore, it enables the branching and conversion of the differential pair of the dual-core coaxial cable 110, with the first shielding layer 123 and the second shielding layer 133 being independent of each other, achieving electromagnetic isolation at the bending points of the first core 121 and the second core 131, allowing the first single-core cable 120 and the second single-core cable 130 to bend independently, thereby eliminating the phase difference and mode conversion problems caused by bending at the conversion point.

[0035] It is understandable that the corresponding ends of the two inner conductors 111 refer to the same end of the two inner conductors 111 in the extension direction of the dual-core coaxial cable 110, which actually refers to the end of the dual-core coaxial cable 110 away from the processor-side connector. The same end of the dual-core shielding layer 113 is connected to the transition shell 143. The ends of the first core 121 and the second core 131 away from the target device are respectively connected to the two transition conductors 141. The ends of the first shielding layer 123 and the first core 121 that are the same as those of the second shielding layer 133 and the second core 131 that are the same as those of the second core 131 are both connected to the transition shell 143.

[0036] In this embodiment, the transition shell 143 is provided with a main channel 144, a first channel 145 and a second channel 146. One end of the first channel 145 and the second channel 146 are respectively connected to one end of the main channel 144 at an angle to form a Y-shaped cavity structure.

[0037] One end of the main channel 144 away from the first channel 145 and the second channel 146 is circumferentially wrapped with a double-core shielding layer 113 to realize the electrical connection between the transition shell 143 and the double-core shielding layer 113. One end of each of the two transition conductors 141 is connected to the two inner conductors 111 respectively in the main channel 144.

[0038] The first channel 145, at one end away from the main channel 144, circumferentially wraps the first shielding layer 123, thereby achieving an electrical connection between the transition shell 143 and the first shielding layer 123. One end of a transition conductor 141, at one end away from the inner conductor 111, extends into the first channel 145 and connects to the first wire core 121.

[0039] The second channel 146, at one end away from the main channel 144, wraps around the second shielding layer 133 to achieve an electrical connection between the transition shell 143 and the second shielding layer 133. The other transition conductor 141, at one end away from the inner conductor 111, extends into the second channel 146 and connects to the second core 131.

[0040] The insulating filler 142 can be injection molded inside the transition shell 143 by an insulating injection molding medium. In this embodiment, the insulating filler 142 includes a first part 1421, a second part 1422 and a third part 1423. The first part 1421 wraps two transition conductors 141 in the main channel 144. The second part 1422 is connected to the first part 1421 and wraps one of the transition conductors 141 in the first channel 145. The third part 1423 is connected to the first part 1421 and wraps the other transition conductor 141 in the second channel 146.

[0041] Preferably, in this embodiment, the portions of the two transition conductors 141 within the main channel 144 are coaxially connected to their respective inner conductors 111. Furthermore, one end of one transition conductor 141 facing away from the inner conductor 111 is coaxially connected to the first core 121, and the other end of the transition conductor 141 facing away from the inner conductor 111 is coaxially connected to the second core 131.

[0042] Specifically, the transition conductor 141 includes a first connecting segment 1411, an intermediate segment 1412, and a second connecting segment 1413 connected in sequence. Both the first connecting segment 1411 and the second connecting segment 1413 are arranged at an angle to the intermediate segment 1412. The first connecting segment 1411 is coaxially connected to one of the inner conductors 111. The second connecting segment 1413 of one of the transition conductors 141 is coaxially connected to the first wire core 121, and its intermediate segment 1412 is located within the first channel 145. The second connecting segment 1413 of the other transition conductor 141 is coaxially connected to the second wire core 131, and its intermediate segment 1412 is located within the second channel 146.

[0043] In this embodiment, the corresponding ends of the first core 121 and the second core 131 are arranged side by side. Correspondingly, the first connecting segment 1411 and the second connecting segment 1413 of the two transition conductors 141 are arranged side by side, and the middle segment 1412 of the two is arranged at an angle.

[0044] Understandably, in order to achieve low-loss transmission, the diameters of the first single-core cable 120 and the second single-core cable 130 are larger, and the distance between the first core 121 and the second core 131 is greater than the distance between the two inner conductors 111. Therefore, in order to enable the two inner conductors 111 to branch and connect to the first core 121 and the second core 131, the middle section 1412 of the two transition conductors 141 needs to be bent relative to the first connecting section 1411 and the second connecting section 1413.

[0045] In this embodiment, the middle sections 1412 of the two transition conductors 141 are respectively located in the first channel 145 and the second channel 146, that is, the bending positions between the middle sections 1412 of the two transition conductors 141 and their respective first connecting sections 1411 and second connecting sections 1413 are respectively located in the first channel 145 and the second channel 146.

[0046] Since the first channel 145 and the second channel 146 have independent shielding layer structures, the relative deformation of the bending parts of the two transition conductors 141 does not interfere with each other, thus avoiding mode conversion caused by relative deformation and improving signal transmission quality.

[0047] In this embodiment, the main channel 144 includes a main wrapping section 1441, a main contraction section 1442, and a main transition section 1443 connected in sequence. The main wrapping section 1441 wraps the dual-core shielding layer 113 circumferentially. The main contraction section 1442 gradually contracts from one end connected to the main wrapping section 1441 to one end connected to the main transition section 1443. The end of the main transition section 1443 away from the main contraction section 1442 is connected to the first channel 145 and the second channel 146 respectively.

[0048] It is understandable that the main contraction section 1442 gradually contracts from the end connecting the main wrapping section 1441 to the end connecting the main transition section 1443. That is, the cross-sectional area of ​​the main contraction section 1442 continuously decreases from the end connecting the main wrapping section 1441 to the end connecting the main transition section 1443, and the cross-sectional areas at both ends of the main contraction section 1442 are equal to those of the main wrapping section 1441 and the main transition section 1443, respectively.

[0049] Similarly, the first channel 145 includes a first wrapping section 1451, a first contraction section 1452 and a first transition section 1453 connected in sequence. The first wrapping section 1451 wraps the first shielding layer 123 circumferentially. The first contraction section 1452 gradually contracts from one end connected to the first wrapping section 1451 to one end connected to the first transition section 1453. The end of the first transition section 1453 away from the first contraction section 1452 is connected to the main channel 144.

[0050] The first contraction segment 1452 gradually contracts from one end connecting the first wrapping segment 1451 to one end connecting the first transition segment 1453. That is, the cross-sectional area of ​​the first contraction segment 1452 continuously decreases from one end connecting the first wrapping segment 1451 to one end connecting the first transition segment 1453, and the cross-sectional areas at both ends of the first contraction segment 1452 are equal to those of the first wrapping segment 1451 and the first transition segment 1453, respectively.

[0051] The second channel 146 includes a second wrapping section 1461, a second contraction section 1462, and a second transition section 1463 connected in sequence. The second wrapping section 1461 circumferentially wraps the second shielding layer 133. The second contraction section 1462 gradually contracts from one end connected to the second wrapping section 1461 to one end connected to the second transition section 1463. The end of the second transition section 1463 away from the second contraction section 1462 is connected to the main channel 144.

[0052] The second contraction segment 1462 gradually contracts from one end connecting the second wrapping segment 1461 to one end connecting the second transition segment 1463. That is, the cross-sectional area of ​​the second contraction segment 1462 continuously decreases from one end connecting the second wrapping segment 1461 to one end connecting the second transition segment 1463, and the cross-sectional areas at both ends of the second contraction segment 1462 are equal to those of the second wrapping segment 1461 and the second transition segment 1463, respectively.

[0053] Preferably, in this embodiment, the main contraction section 1442, the first contraction section 1452, and the second contraction section 1462 are all frustum-shaped cylindrical structures.

[0054] In practice, the first portion 1421 of the insulating filler 142 fills the main transition section 1443, the second portion 1422 fills the first transition section 1453, and the third portion 1423 fills the second transition section 1463. Because the dielectric constant of the insulating filler 142 is relatively large, greater than that of the intermediate insulating layer 112, the first insulating layer 122, and the second insulating layer 132, in order to ensure high bandwidth is maintained when transitioning from the first single-core cable 120 and the second single-core cable 130 to the dual-core coaxial cable 110, the cross-sectional area of ​​the main transition section 1443 needs to be smaller than the cross-sectional area of ​​the internal cavity of the dual-core coaxial cable 110. Similarly, the cross-sectional area of ​​the first transition section 1453 needs to be smaller than the cross-sectional area of ​​the internal cavity of the first single-core cable 120, and the cross-sectional area of ​​the second transition section 1463 needs to be smaller than the cross-sectional area of ​​the internal cavity of the second single-core cable 130.

[0055] That is, the cross-sectional area of ​​the main transition section 1443 is smaller than the cross-sectional area of ​​the main wrapping section 1441 and transitions smoothly through the main contraction section 1442; the cross-sectional area of ​​the first transition section 1453 is smaller than the cross-sectional area of ​​the first wrapping section 1451 and transitions smoothly through the first contraction section 1452; and the cross-sectional area of ​​the second transition section 1463 is smaller than the cross-sectional area of ​​the second wrapping section 1461 and transitions smoothly through the second contraction section 1462.

[0056] Preferably, in this embodiment, one end of each of the two transition conductors 141 is coaxially connected to the two inner conductors 111 in the main contraction section 1442, the end of the transition conductor 141 in the first channel 145 away from the inner conductor 111 is coaxially connected to the first wire core 121 in the first contraction section 1452, and the end of the transition conductor 141 in the second channel 146 away from the inner conductor 111 is coaxially connected to the second wire core 131 in the second contraction section 1462.

[0057] This connection method ensures that the inner and outer conductor relationships between the first core 121 of the first single-core cable 120 and the first shielding layer 123, as well as between the second core 131 of the second single-core cable 130 and the second shielding layer 133, are maintained during the initial transition phase. This prevents the first core 121 and the second core 131 from bending or shifting as soon as they leave their respective first shielding layers 123 and 133, thus avoiding impedance abrupt changes.

[0058] Furthermore, the two first connecting segments 1411 of the two transition conductors 141 extending in a straight line cooperate with the tapered main contraction segment 1442 of the transition shell 143, and the two second connecting segments 1413 of the two transition conductors 141 extending in a straight line cooperate with the tapered first contraction segment 1452 and second contraction segment 1462 of the transition shell 143, respectively, which can reduce the sudden change of parasitic inductance and parasitic capacitance, and improve passive performance such as return loss and insertion loss.

[0059] Furthermore, the conical shell structure allows the boundaries of the dual-core shielding layer 113, the first shielding layer 123, and the second shielding layer 133 to gradually change along the signal transmission direction, resulting in a smooth transition of the electromagnetic field. This reduces the risk of local signal reflection, mode conversion, and high-frequency radiation leakage, and improves the effective bandwidth of the transition structure. Please refer to [reference needed]. Figure 4 and Figure 5 , Figure 4 The diagram shown is a structural schematic of the cable connection structure 100 provided in the second embodiment of this application. Figure 5 The diagram shown is a partial structural schematic of the cable connection structure 100.

[0060] In the first embodiment, the transition housing 143 is made by stamping. The difference in the cable connection structure 100 provided in the second embodiment is that its transition housing 143 is made by casting, including a base 1431 and a top cover 1432. The top cover 1432 covers the base 1431 to form the main channel 144, the first channel 145 and the second channel 146.

[0061] In summary, the cable connection structure 100 provided in this embodiment can realize the broadband transition from a dual-core coaxial cable 110 to two single-core cables, reduce impedance discontinuities in the transition area, and improve high-speed signal transmission performance and cable layout flexibility.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cable connection structure, characterized in that, include: The dual-core coaxial cable (110) includes two spaced inner conductors (111) forming a differential pair, an intermediate insulation layer (112) wrapping the two inner conductors (111), and a dual-core shielding layer (113) wrapping the intermediate insulation layer (112). The first single-core cable (120) includes a first core (121), a first insulation layer (122) covering the first core (121), and a first shielding layer (123) covering the first insulation layer (122). The second single-core cable (130) includes a second core (131), a second insulation layer (132) wrapping the second core (131), and a second shielding layer (133) wrapping the second insulation layer (132). The transition assembly (140) includes two spaced-apart transition conductors (141), an insulating filler (142) that wraps around the two transition conductors (141), and a transition shell (143) that wraps around the insulating filler (142). The corresponding ends of the two inner conductors (111) are connected to the first core (121) and the second core (131) respectively through the two transition conductors (141), and the dual-core shielding layer (113), the first shielding layer (123) and the second shielding layer (133) are all connected to the transition shell (143).

2. The cable connection structure according to claim 1, characterized in that, The transition shell (143) is provided with a main channel (144), a first channel (145) and a second channel (146). One end of the first channel (145) and the second channel (146) are respectively connected to one end of the main channel (144) at an angle to form a Y-shaped cavity structure. The main channel (144) is circumferentially wrapped around the dual-core shielding layer (113) at one end away from the first channel (145) and the second channel (146), and one end of each of the two transition conductors (141) is connected to the two inner conductors (111) respectively in the main channel (144); The first channel (145) is circumferentially wrapped around the first shielding layer (123) at one end away from the main channel (144), and one of the transition conductors (141) extends into the first channel (145) and connects to the first wire core (121) at one end away from the inner conductor (111); The second channel (146) is circumferentially wrapped around the second shielding layer (133) at one end away from the main channel (144), and the other transition conductor (141) extends into the second channel (146) and connects to the second wire core (131) at one end away from the inner conductor (111).

3. The cable connection structure according to claim 2, characterized in that, The portions of the two transition conductors (141) within the main channel (144) are coaxially connected to their respective inner conductors (111); and / or, One of the transition conductors (141) is coaxially connected to the first core (121) at one end away from the inner conductor (111), and the other transition conductor (141) is coaxially connected to the second core (131) at one end away from the inner conductor (111).

4. The cable connection structure according to claim 2, characterized in that, The insulating filler (142) includes a first part (1421), a second part (1422) and a third part (1423). The first part (1421) wraps two transition conductors (141) in the main channel (144). The second part (1422) is connected to the first part (1421) and wraps one of the transition conductors (141) in the first channel (145). The third part (1423) is connected to the first part (1421) and wraps the other transition conductor (141) in the second channel (146).

5. The cable connection structure according to claim 2, characterized in that, The transition conductor (141) includes a first connecting segment (1411), an intermediate segment (1412), and a second connecting segment (1413) connected in sequence. The first connecting segment (1411) and the second connecting segment (1413) are both arranged at an angle to the intermediate segment (1412). The first connecting segment (1411) is coaxially connected to one of the inner conductors (111). The second connecting segment (1413) is coaxially connected to the first wire core (121), and the middle segment (1412) is located within the first channel (145); or, the second connecting segment (1413) is coaxially connected to the second wire core (131), and the middle segment (1412) is located within the second channel (146).

6. The cable connection structure according to claim 5, characterized in that, The first connecting segment (1411) and the second connecting segment (1413) of the two transition conductors (141) are arranged side by side, and the middle segment (1412) of the two is arranged at an angle.

7. The cable connection structure according to claim 2, characterized in that, The main channel (144) includes a main wrapping section (1441), a main contraction section (1442), and a main transition section (1443) connected in sequence. The main wrapping section (1441) circumferentially wraps the dual-core shielding layer (113). The main contraction section (1442) gradually contracts from one end connected to the main wrapping section (1441) to one end connected to the main transition section (1443). The end of the main transition section (1443) away from the main contraction section (1442) is connected to the first channel (145) and the second channel (146) respectively.

8. The cable connection structure according to claim 7, characterized in that, One end of each of the two transition conductors (141) is connected to one of the two inner conductors (111) within the main contraction section (1442).

9. The cable connection structure according to claim 2, characterized in that, The first channel (145) includes a first wrapping section (1451), a first contraction section (1452), and a first transition section (1453) connected in sequence. The first wrapping section (1451) circumferentially wraps the first shielding layer (123). The first contraction section (1452) gradually contracts from one end connected to the first wrapping section (1451) to one end connected to the first transition section (1453). The end of the first transition section (1453) away from the first contraction section (1452) is connected to the main channel (144); and / or, The second channel (146) includes a second wrapping section (1461), a second contraction section (1462), and a second transition section (1463) connected in sequence. The second wrapping section (1461) wraps the second shielding layer (133) circumferentially. The second contraction section (1462) gradually contracts from one end connected to the second wrapping section (1461) to one end connected to the second transition section (1463). The end of the second transition section (1463) away from the second contraction section (1462) is connected to the main channel (144).

10. The cable connection structure according to claim 9, characterized in that, The transition conductor (141) located within the first channel (145), with one end facing away from the inner conductor (111), is connected to the first wire core (121) within the first contraction section (1452); and / or, The transition conductor (141) located in the second channel (146) has one end opposite to the inner conductor (111) connected to the first core (121) in the second contraction section (1462).

Images