High-speed cable connector structure for improving crosstalk

Abstract

The utility model relates to a high-speed cable connector structure for improving crosstalk, which comprises a PCBA (printed circuit board assembly) arranged in a shell, a plurality of bonding pad groups arranged on the PCBA and signal lines arranged corresponding to the bonding pad groups, each bonding pad group comprises a signal bonding pad and a shielding ground bonding pad, a signal conductor and an aluminum foil are exposed at the front end of each signal line, the signal conductor is welded and fixed with the signal bonding pad, and the shielding ground bonding pad is welded and fixed with the signal bonding pad. The printed circuit board is characterized in that UV insulating blocks wrapping the corresponding signal bonding pads and the signal conductors are formed at the front ends of the signal lines on the PCBA through glue dispensing or forming, the UV insulating blocks are covered with conductive layers through glue dispensing or forming, and the conductive layers are used for conducting the corresponding shielding ground bonding pads and the aluminum foil to form a complete shielding layer. According to the utility model, the signal crosstalk between the signal lines can be further reduced, the manufacture is convenient, and the compatibility with PCBAs of various specifications is better.

Description

Technical Field

[0001] The utility model relates to a high-speed cable connector structure for improving crosstalk. Background Art

[0002] Known high-speed cables are all multi-channel products, and the structure of their head connectors mainly includes PCBA and multiple channel signal lines connected to it. The outer insulation sleeves at the front of these channel signal lines are cut off, and the internal aluminum foil and inner insulation sleeves are cut in turn to expose the signal conductors wrapped by the inner insulation sleeves, and then welded and fixed to the preset signal pads on the PCBA to complete the connection. The aluminum foil has a grounding wire, which is used to weld and conduct with the shielding ground pad on the PCBA to achieve shielding, thereby ensuring the stability of the channel signal.

[0003] However, after the aluminum foil with signal shielding function around the signal conductor is cut, the electromagnetic signal of the signal conductor radiates outward without blocking, which will cause greater signal crosstalk between channel signal lines. In addition, the current conventional PCBA processing basically adopts a symmetrical fan-out solution, that is, all vias are symmetrical and equidistant, resulting in magnetic field induction in adjacent wires when current passes through the wires, thereby enhancing crosstalk.

[0004] The current solution is to add a metal shielding cover to the PCBA to shield the signal conductor to improve crosstalk. The bottom of the metal shielding cover is provided with a ground pin that is welded and fixed to the shielding ground pad, and the grounding wire of the aluminum foil is directly welded to the metal shielding cover. However, the disadvantage of this shielding structure is that the metal shielding cover needs to be specially adapted to the size of the corresponding pad and signal conductor for production and manufacturing, which often has a small range of adaptability. In addition, it needs to be aligned and assembled on the PCBA, which makes the manufacturing more cumbersome and inconvenient, resulting in reduced production efficiency.

[0005] With the rapid development of the communications industry, the transmission rate of high-speed cable products has been greatly improved, and the corresponding crosstalk between channels has also been greatly increased, which cannot meet the association's specifications and urgently needs to be improved. Summary of the invention

[0006] The purpose of the utility model is to provide a high-speed cable connector structure with improved crosstalk in view of the problems mentioned in the background technology, which can not only further reduce the signal crosstalk between signal lines, but also is easy to manufacture and has better compatibility with PCBAs of various specifications.

[0007] The technical solution of the utility model is: a high-speed cable connector structure for improving crosstalk, including a PCBA arranged in a shell, a plurality of pad groups arranged on the PCBA and signal lines arranged corresponding to each pad group, the pad group including a signal pad and a shielding ground pad, a signal conductor and an aluminum foil are exposed at the front end of the signal line, and the signal conductor is welded and fixed to the signal pad, characterized in that a UV insulating block wrapping the corresponding signal pad and the signal conductor is formed on the PCBA at the front end of each signal line by dispensing or molding, and the UV insulating block is covered with a conductive layer by dispensing or molding, and the conductive layer is used to conduct the corresponding shielding ground pad and the aluminum foil to form a complete shielding layer.

[0008] Furthermore, the shielding ground pads of the pad group described in the utility model include two first shielding ground pads that are symmetrically arranged on the left and right, two second shielding ground pads that are symmetrically arranged on the inner side and below the two first shielding ground pads, and a third shielding ground pad that is arranged in the middle of the two first shielding ground pads, and the third shielding ground pad is located above the two second shielding ground pads; the signal pads of the pad group include two unit signal pads on the inner side of the two second shielding ground pads that are symmetrically arranged on the left and right, and the front end of the signal line exposes a signal conductor that is respectively welded and fixed to the two unit signal pads; and the conductive layer is connected and conductive to the two first shielding ground pads, the two second shielding ground pads and the third shielding ground pad.

[0009] Furthermore, the outermost side of the signal line in the utility model is an outer insulating sleeve, the aluminum foil is arranged on the inner side of the outer insulating sleeve, the inner insulating sleeve is arranged inside the aluminum foil, and the inner insulating sleeve is wrapped around the outside of the signal conductor; the outer insulating sleeve, the aluminum foil and the inner insulating sleeve are cut off in sequence at the front end of the signal line to expose the signal conductor.

[0010] Furthermore, the pad groups in the present invention are staggered in the width direction of the PCBA.

[0011] Furthermore, the rear side of each signal line in the present invention is provided with a 135-degree bend, and the spacing between adjacent signal lines on the PCBA is greater than 24 mil.

[0012] Furthermore, a copper joint is provided on the top of the PCBA in the utility model, two installation grooves are symmetrically provided on the upper left and right sides of the PCBA, and a positioning groove is provided in the middle of the left and right sides of the PCBA for positioning and fixing the PCBA in the shell.

[0013] The advantages of adopting the technical solution of the utility model are as follows:

[0014] 1. The utility model eliminates the metal shielding cover, and instead forms a UV insulating block that wraps the corresponding signal pad and signal conductor at the front end of each signal line on the PCBA by dispensing or molding, and then covers the conductive layer on the UV insulating block by dispensing or molding, and makes the conductive layer conduct the corresponding shielding ground pad and aluminum foil to form a complete shielding layer. This structure not only further reduces the electromagnetic interference between signal lines, improves the crosstalk problem caused by the magnetic field formed by the current passing through the signal line, but also because there is no need to introduce the production and assembly of the metal shielding cover, the manufacturing is more convenient, and the compatibility with PCBAs of various specifications is better.

[0015] 2. In a further solution of the utility model, the pad groups are staggered, and the rear side of each signal line is bent 135 degrees, and the spacing between adjacent signal lines is greater than 24 mils. These measures can effectively reduce the crosstalk between signal lines, which is beneficial to improving the stability and reliability of signal transmission. The bending of the rear end of the signal line can reduce the reflection at the end of the signal line, which is beneficial to maintaining signal integrity and reducing signal attenuation, and improving the quality of the signal. The spacing between adjacent signal lines is greater than 24 mils, which can reduce the crosstalk caused by interconnection and is beneficial to maintaining the purity and stability of the signal.

[0016] 3. The utility model can also greatly improve the internal channel signal crosstalk problem without increasing the internal pad group spacing, without changing the layout of the multi-channel signal line, and without reducing the number of signal lines, and can ensure the integrity of the original multi-channel signal line layout of the high-speed cable connector. At the same time, it does not shield and reinforce the structure of the signal line of the high-speed cable itself, and can keep the high-speed cable as it is, improve the adaptability to the current high-speed cable, and greatly save the improvement cost.

[0017] 4. In the utility model, since the conductive layer is directly introduced by dispensing or molding to connect the shielding ground pad and the aluminum foil, there is no need to connect the ground wire on the aluminum foil to weld with the shielding ground pad as in conventional technology, which simplifies the production and assembly process and improves production efficiency.

[0018] 5. The UV insulating block in the utility model effectively makes up for the shielding function of the aluminum foil at the front end of the signal conductor that was originally cut off, and is easy to produce and manufacture, which is conducive to the promotion and application on the current high-speed cable connector.

[0019] The objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments, which are given as examples only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the overall structure of the utility model;

[0021] Figure 2 for Figure 1 A top view of the structure after removing the front conductive layer of each signal line;

[0022] Figure 3 for Figure 2 The top view of the structure after removing the UV insulation block at the front end of each signal line;

[0023] Figure 4 for Figure 3 The top view of the structure after removing the signal lines (only the PCBA and its upper pad group are retained);

[0024] Figure 5 It is a schematic diagram of a separate three-dimensional structure of a signal line in the utility model;

[0025] Figure 6 for Figure 4 A is an enlarged schematic diagram in Figure 1 (a separate schematic diagram of the pad group).

[0026] In the figure: 1. PCBA; 2. connector; 3. positioning groove; 4. first shielding ground pad; 5. unit signal pad; 6. signal line; 7. signal conductor; 8. UV insulation block; 9. conductive layer; 10. outer insulation sleeve; 11. aluminum foil; 12. inner insulation sleeve; 13. second shielding ground pad; 14. third shielding ground pad; 15. mounting groove. DETAILED DESCRIPTION

[0027] Example: The following combination Figure 1 to Figure 6 As shown, the specific implementation of the high-speed cable connector structure for improving crosstalk provided by the utility model is described as follows:

[0028] This high-speed cable connector structure for improving crosstalk is the same as conventional technology, and comprises a PCBA1 arranged in a housing, a plurality of pad groups arranged on the PCBA1, and a signal line 6 arranged corresponding to each pad group, the pad group comprises a signal pad and a shielding ground pad, a signal conductor 7 and an aluminum foil 11 are exposed at the front end of the signal line 6, and the signal conductor 7 is welded and fixed to the signal pad 5. Figure 5 As shown, the signal line 6 is the same as the conventional technology, with the outermost side being the outer insulating sleeve 10, the inner side of the outer insulating sleeve 10 being provided with the aluminum foil 11, the inner side of the aluminum foil 11 being provided with the inner insulating sleeve 12, and the inner insulating sleeve 12 being wrapped around the outside of the signal conductor 7; the outer insulating sleeve 10, the aluminum foil 11 and the inner insulating sleeve 12 are sequentially cut off at the front end of the signal line 6 to expose the signal conductor 7, and the aluminum foil 11 is also partially exposed after the front part of the outer insulating sleeve 10 is cut off.

[0029] The core improvement of the utility model is that a UV insulating block 8 wrapping the corresponding signal pad and the signal conductor 7 is formed on the front end of each signal line 6 on the PCBA1 by dispensing or molding, and the UV insulating block 8 is covered with a conductive layer 9 by dispensing or molding. The conductive layer 9 is used to conduct the corresponding shielding ground pad and the aluminum foil 11 to form a complete shielding layer.

[0030] Further integration Figure 1-Figure 6 As shown, in this embodiment, the shielding ground pads of each pad group are composed of two first shielding ground pads 4 symmetrically arranged, two second shielding ground pads 13 symmetrically arranged inside and below the two first shielding ground pads 4, and a third shielding ground pad 14 arranged in the middle of the two first shielding ground pads 4, wherein the third shielding ground pad 14 is located above the two second shielding ground pads 13. The signal pads of the pad group are composed of two unit signal pads 5 inside the two second shielding ground pads 13 symmetrically arranged, and the front end of the signal line 6 exposes a signal conductor 7 respectively welded and fixed to the two unit signal pads 5; and the conductive layer 9 is connected and conductive to the two first shielding ground pads 4, the two second shielding ground pads 13 and the third shielding ground pad 14.

[0031] The pad groups in this embodiment are arranged in a staggered manner in the width direction of PCBA1.

[0032] The rear side of each signal line 6 is provided with a 135 degree bend, and the spacing between adjacent signal lines 6 on PCBA1 is greater than 24 mil. Figure 1-3 shown.

[0033] In this embodiment, a copper joint 2 is provided on the top of the PCBA1, two installation grooves 15 are symmetrically provided on the upper left and right sides of the PCBA1, and a positioning groove 3 is provided in the middle of the left and right sides of the PCBA1 for positioning and fixing the PCBA1 in the shell.

[0034] The two first shielding ground pads 4 , the two second shielding ground pads 13 , the third shielding ground pad 14 and the two unit signal pads 5 are all copper pads, and the substrate of the PCBA 1 is a glass fiber reinforced epoxy resin material.

[0035] The utility model eliminates the metal shielding cover, and instead forms a UV insulating block 8 that wraps the corresponding signal pad and signal conductor 7 at the front end of each signal line 6 on PCBA1 by dispensing or molding, and then covers the UV insulating block 8 with a conductive layer 9 by dispensing or molding, and makes the conductive layer 9 conduct to the corresponding shielding ground pad and aluminum foil 11 to form a complete shielding layer. This structure not only further reduces the electromagnetic interference between the signal lines 6, improves the crosstalk problem caused by the magnetic field formed by the current passing through the signal line 6, but also because there is no need to introduce the production and assembly of the metal shielding cover, the manufacturing is more convenient, and the compatibility with PCBA1 of various specifications is better.

[0036] At the same time, the pad groups in the utility model are staggered, and the rear side of each signal line 6 is bent 135 degrees, and the spacing between adjacent signal lines 6 is greater than 24 mils. These measures can effectively reduce the crosstalk between the signal lines 6, which is beneficial to improving the stability and reliability of signal transmission. The bending of the rear end of the signal line 6 can reduce the reflection at the end of the signal line 6, which is beneficial to maintaining signal integrity and reducing signal attenuation, and improving the quality of the signal. The spacing between adjacent signal lines 6 is greater than 24 mils, which can reduce the crosstalk caused by interconnection, which is beneficial to maintaining the purity and stability of the signal.

[0037] Of course, the above are only specific application examples of the utility model, and do not constitute any limitation on the protection scope of the utility model. In addition to the above embodiments, the utility model can also have other implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model.

Claims

1. A high-speed cable connector structure for improving crosstalk, comprising a PCBA (1) arranged in a housing, a plurality of pad groups arranged on the PCBA (1), and a signal line (6) arranged corresponding to each pad group, the pad group comprising a signal pad and a shielding ground pad, a signal conductor (7) and an aluminum foil (11) exposed at the front end of the signal line (6), the signal conductor (7) being fixed to the signal pad (5) by welding, characterized in that A UV insulating block (8) is formed on the PCBA (1) at the front end of each signal line (6) by dispensing or molding, and the UV insulating block (8) is covered with a conductive layer (9) by dispensing or molding. The conductive layer (9) is used to conduct the corresponding shielding ground pad and the aluminum foil (11) to form a complete shielding layer.

2. A high-speed cable connector structure for improving crosstalk according to claim 1, characterized in that: The shielding ground pads of the pad group include two first shielding ground pads (4) symmetrically arranged, two second shielding ground pads (13) symmetrically arranged inside and below the two first shielding ground pads (4), and a third shielding ground pad (14) arranged in the middle of the two first shielding ground pads (4), the third shielding ground pad (14) being located above the two second shielding ground pads (13); the signal pads of the pad group include two unit signal pads (5) inside the two second shielding ground pads (13) symmetrically arranged, the front end of the signal line (6) exposes a signal conductor (7) respectively welded and fixed to the two unit signal pads (5); and the conductive layer (9) is connected and conductive to the two first shielding ground pads (4), the two second shielding ground pads (13) and the third shielding ground pad (14).

3. A high-speed cable connector structure for improving crosstalk according to claim 1 or 2, characterized in that: The outermost side of the signal line (6) is an outer insulating sleeve (10), the inner side of the outer insulating sleeve (10) is provided with the aluminum foil (11), the inner insulating sleeve (12) is provided inside the aluminum foil (11), and the inner insulating sleeve (12) is wrapped around the outside of the signal conductor (7); the outer insulating sleeve (10), the aluminum foil (11) and the inner insulating sleeve (12) are cut off in sequence at the front end of the signal line (6) to expose the signal conductor (7).

4. The high-speed cable connector structure for improving crosstalk according to claim 1, characterized in that: The pad groups are arranged in a staggered manner in the width direction of the PCBA (1).

5. A high-speed cable connector structure for improving crosstalk according to claim 4, characterized in that: The rear side of each signal line (6) is provided with a 135-degree bend, and the spacing between adjacent signal lines (6) on the PCBA (1) is greater than 24 mils.

6. A high-speed cable connector structure for improving crosstalk according to claim 1, characterized in that A copper joint (2) is provided on the top of the PCBA (1), two mounting grooves (15) are symmetrically provided at upper positions on the left and right sides of the PCBA (1), and a positioning groove (3) is provided at the middle position on the left and right sides of the PCBA (1).

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