Shielding Sheet, Communication Module and Backplane Connector Socket

Abstract

The present invention relates to a shielding sheet, a communication module and a backplane connector socket. It includes: a substrate portion having a first edge and a second edge, the extending direction of the first edge being arranged at an angle with the extending direction of the second edge, and a plurality of through holes penetrating the substrate portion in the thickness direction and spaced apart are formed on the substrate portion; shielding rings, corresponding to the through holes one by one, the shielding rings protruding and fixed on the substrate portion and surrounding the through holes; a first connecting portion spaced apart along the extending direction of the first edge on the first edge; and a second connecting portion spaced apart along the extending direction of the second edge on the second edge; wherein, the shielding sheet is divided into a plurality of shielding columns spaced apart and extending along a set curve, the first connecting portion and the second connecting portion form a shielding column, or the first connecting portion, the second connecting portion and at least one shielding ring form a shielding column. In this way, the anti-interference ability of the shielding sheet to signals can be improved, thereby improving the shielding effect of the shielding sheet.

Description

Technical Field

[0001] The present invention relates to the technical field of communication devices, and particularly to a shielding sheet, a communication module including the shielding sheet, and a backplane connector socket. Background Art

[0002] A backplane connector socket can bridge the flow of current between circuit boards. With the increasing demand for bandwidth in communication terminals such as switches, routers, modems, and user access terminal devices, higher requirements are imposed on the high-speed transmission of connector signals and signal integrity. Differential signals have been widely used due to their good transmission performance. However, for traditional backplane connector sockets, there are usually still defects of mutual interference between differential signals, thus affecting the signal transmission performance of the backplane connector socket. Summary of the Invention

[0003] One technical problem solved by the present invention is how to reduce signal interference to improve the shielding effect.

[0004] A shielding sheet includes:

[0005] A substrate portion having a first edge and a second edge, the extending direction of the first edge being arranged at an angle to the extending direction of the second edge, and a plurality of through holes penetrating through the substrate portion in the thickness direction and spaced apart are formed on the substrate portion.

[0006] Shielding rings corresponding to the through holes one by one, the shielding rings protruding and fixed on the substrate portion and surrounding the through holes.

[0007] A first connecting portion spaced along the extending direction of the first edge on the first edge; and

[0008] A second connecting portion spaced along the extending direction of the second edge on the second edge.

[0009] Wherein, the shielding sheet is divided into a plurality of shielding columns spaced apart and extending along a set curve, the first connecting portion and the second connecting portion form the shielding columns, or the first connecting portion, the second connecting portion, and at least one of the shielding rings form the shielding columns.

[0010] In one embodiment, the shielding ring has side plates defining an interval space between two adjacent shielding columns, and through holes penetrating through the side plates in the thickness direction are formed on the side plates, the number of the through holes being multiple, and the multiple through holes being arranged in a matrix.

[0011] In one embodiment, a grille portion is further included. The grille portion is connected to the substrate portion and is located in the through hole. The grille portion divides the through hole into multiple regions.

[0012] In one embodiment, the extending direction of the grille portion is the same as the extending direction of the shielding column.

[0013] In one embodiment, the shielding sheet is integrally formed.

[0014] In one embodiment, the thickness of the shielding ring is less than or equal to the thickness of the substrate portion.

[0015] In one embodiment, for the same column of the shielding columns, the arrangement direction of the shielding rings disposed closer to the first connection portion is the same as the extending direction of the first connection portion, and the arrangement direction of the shielding rings disposed closer to the second connection portion forms an included angle with the extending directions of both the first connection portion and the second connection portion.

[0016] In one embodiment, the first connection portion is used for electrically connecting with a plug, the second connection portion is used for electrically connecting with a circuit board, and the extending length of the first connection portion is greater than the extending length of the second connection portion.

[0017] A communication module includes a signal group, an insulating carrier, and the shielding sheet according to any one of the above. The shielding sheet is disposed on the insulating carrier. There are multiple signal groups. One signal group is disposed between two adjacent columns of the shielding columns. The signal group includes two differential signal lines with opposite signal polarities.

[0018] A backplane connector socket includes a housing and multiple communication modules as described above. Multiple mounting grooves are formed in the housing. The mounting grooves correspond to the communication modules one by one, and the communication modules are fitted with the mounting grooves.

[0019] A technical effect of an embodiment of the present invention is that in view of the shielding sheet being divided into multiple shielding columns that are spaced apart and extend along a set curve, the first connection portion and the second connection portion form a shielding column, or the first connection portion, the second connection portion, and at least one shielding ring form a shielding column. For the signal groups located between the respective shielding columns, since the shielding rings protrude a certain height relative to the substrate portion, the shielding rings will shield and isolate the respective signal groups to reduce the mutual crosstalk of signals between adjacent signal groups, thereby helping to improve the anti-interference ability of the shielding sheet to signals and thus improving the shielding effect. At the same time, the first connection portion and the second connection portion can also reduce the mutual crosstalk of signals between adjacent signal groups, further improving the anti-interference ability of the shielding sheet to signals. Therefore, the shielding columns can reduce signal interference, thereby improving the shielding effect of the shielding sheet. Description of the Drawings

[0020] Figure 1 Schematic perspective view of a backplane connector socket provided for an embodiment;

[0021] Figure 2 For Figure 1 Schematic perspective view of the communication module in the backplane connector socket shown;

[0022] Figure 3 For Figure 2 Schematic exploded view of a first example of the communication module shown;

[0023] Figure 4 For Figure 2 Schematic exploded view of a second example of the communication module shown;

[0024] Figure 5 For Figure 2 Schematic partial plan view of the communication module shown including a shielding sheet and signal groups;

[0025] Figure 6 For Figure 2 Schematic plan view of the arrangement of multiple signal groups in the communication module shown;

[0026] Figure 7 For Figure 2 Schematic plan view of the shielding sheet in the communication module shown;

[0027] Figure 8 For Figure 2 Schematic partial perspective sectional view of the shielding sheet in the communication module shown. Detailed implementation manners

[0028] For ease of understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present invention can be understood more thoroughly and comprehensively.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "inner", "outer", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0030] Refer to Figure 1 and Figure 2, a backplane connector socket 10 provided by an embodiment of the present invention includes a housing 20 and a communication module 30. The housing 20 can be made of an insulating material. A plurality of mounting grooves 21 are formed on the housing 20. The number of communication modules 30 is multiple, and there is a one-to-one correspondence between the communication modules 30 and the mounting grooves 21. The communication modules 30 are received in the mounting grooves 21, that is, each mounting groove 21 receives one communication module 30. One side of the backplane connector socket 10 is electrically connected to a circuit board, and the other side of the backplane connector socket 10 is used to cooperate with a plug to achieve an electrical connection relationship. The signal lines inside the backplane connector socket 10 and the signal lines inside the plug are electrically connected to each other, so as to realize the cooperation between the plug and the backplane connector socket 10.

[0031] Refer to Figure 3 , Figure 4 and Figure 5 , the communication module 30 includes a signal group 31, an insulating carrier 32 and a shielding sheet 33. The shielding sheet 33 is disposed on the insulating carrier 32. The shielding sheet 33 can be detachably connected to the insulating carrier 32. For example, the shielding sheet 33 can be fixed to the insulating carrier 32 by means of snap connection and screw connection. The insulating carrier 32 is made of an insulating material. The number of signal groups 31 is multiple, and each signal group 31 includes two differential signal lines 31a. The signal polarities of the two differential signal lines 31a are opposite. Therefore, through this signal group 31, the signal transmission speed can be greatly improved. In view of the fact that each signal group 31 includes two differential signal lines 31a with opposite signal polarities, the shielding sheet 33 can be provided to shield the signals transmitted by two adjacent signal groups 31, preventing the signals transmitted by one signal group 31 from interfering with the signals transmitted by another signal group 31.

[0032] In some embodiments, the shielding sheet 33 includes a substrate portion 100, a shielding ring 200, a first connecting portion 310 and a second connecting portion 320. For example, the entire shielding sheet 33 is integrally formed by stamping and stretching; or the substrate portion 100, the first connecting portion 310 and the second connecting portion 320 are integrally formed by stamping or stretching, and the shielding ring 200 is fixed to the substrate portion 100 by means such as welding. The welding method can be brazing or fusion welding, and the fusion welding can be laser welding or ultrasonic welding, etc.

[0033] Refer to Figure 5 , Figure 7 and Figure 8, the substrate portion 100 has a first edge 110 and a second edge 120. The first edge 110 can extend in a first direction, and the second edge 120 can extend in a second direction. The first direction and the second direction can be perpendicular to each other. At this time, the first edge 110 and the second edge 120 are perpendicular to each other. The first direction and the second direction can be set at an acute angle. At this time, the first edge 110 and the second edge 120 intersect at an acute angle. The substrate portion 100 also has a first surface 131 and a second surface 132. The first surface 131 and the second surface 132 are two surfaces spaced apart in the thickness direction of the substrate portion 100, such that the orientations of the first surface 131 and the second surface 132 are opposite. The first surface 131 faces the insulating carrier 32 and can be attached to the insulating carrier 32, and the second surface 132 faces away from the insulating carrier 32. A through hole 140 is formed in the substrate portion 100. The through hole 140 penetrates the entire substrate portion 100 in the thickness direction. Therefore, openings of the through hole 140 exist on both the first surface 131 and the second surface 132. The cross-sectional profile of the through hole 140 can be circular, elliptical, or regular polygonal, etc. The number of through holes 140 is multiple. For example, the diameters of each through hole 140 can be equal. Or, the diameters of the through holes 140 can be unequal, such that the diameters of some of the through holes 140 are relatively large, while the diameters of some other through holes 140 are relatively small.

[0034] See Figure 5 , Figure 7 and Figure 8 , the shielding ring 200 is generally in a cylindrical structure with openings at both ends. The shielding ring 200 is disposed on the first surface 131 of the substrate portion 100. That is, one end of the shielding ring 200 is a fixed end, so the fixed end is fixedly connected to the substrate portion 100. The other end of the shielding ring 200 is a free end, and the free end protrudes a certain height relative to the substrate portion 100 in the thickness direction of the substrate portion 100. The number of shielding rings 200 is equal to the number of through holes 140. That is, a one-to-one correspondence is formed between the shielding ring 200 and the through hole 140. The shielding ring 200 is connected to the periphery of the through hole 140, such that the shielding ring 200 surrounds the through hole 140. The cross-sectional profile of the shielding ring 200 can be the same as the cross-sectional profile of the through hole 140. That is, the cross-sectional profile of the shielding ring 200 can also be circular, elliptical, or regular polygonal, etc. Along the direction from the fixed end to the free end of the shielding ring 200, the diameter of the shielding ring 200 can remain constant all the time. At this time, the shielding ring 200 can be understood as a cylindrical shielding ring 200. Along the direction from the fixed end to the free end of the shielding ring 200, the diameter of the shielding ring 200 can gradually increase or gradually decrease. At this time, the shielding ring 200 can be understood as a conical shielding ring 200.

[0035] On the surface of the insulating carrier 32 facing the substrate portion 100, a blind hole can be formed by recessing a certain depth, so that the shielding ring 200 is received in the blind hole. After the shielding sheet 33 and the insulating carrier 32 are assembled, the shielding ring 200 will be hidden in the blind hole. The blind hole plays a role in receiving, positioning, and protecting the shielding ring 200.

[0036] Refer to Figure 5 , Figure 7 and Figure 8 , the first connecting portion 310 is connected to the first edge 110. The number of the first connecting portions 310 is multiple, and the number of the first connecting portions 310 can be equal to the number of the signal groups 31 corresponding to the shielding sheet 33. The multiple first connecting portions 310 are arranged at intervals along the first direction. Each first connecting portion 310 can extend a certain length along the second direction, so that one end of the first connecting portion 310 is a fixed end and is fixedly connected to the first edge 110, and the other end of the first connecting portion 310 is a free end and protrudes a certain length along the second direction relative to the first edge 110. The first connecting portion 310 has a certain elasticity, and the first connecting portion 310 is used for electrically connecting with the plug. The first connecting portion 310 can include two sections that are bent and connected to each other, and these two sections are denoted as the first section 311 and the second section 312. The first section 311 is fixedly connected to the first edge 110. The first section 311 can be provided with a hole structure. There is a certain included angle between the first section 311 and the second end due to the bending. The opening of the included angle formed by the first section 311 and the second section 312 faces the second surface 132. In view of the bending connection between the first section 311 and the second section 312, a protrusion is formed at the connection between the first section 311 and the second section 312, and the protrusion faces the first surface 131. The protrusion is used for contacting the plug to achieve electrical connection. During the process of the first connecting portion 310 contacting the plug to achieve electrical connection, the second end can provide a guiding function for the plug so that the plug can be smoothly inserted into the backplane connector socket 10; the protrusion can provide an elastic support function for the first connecting portion 310 so that the protrusion always closely contacts the plug.

[0037] The second connecting part 320 is connected to the second edge 120. The number of the second connecting parts 320 is multiple, and the number of the second connecting parts 320 may be equal to the number of the signal groups 31 corresponding to the shielding sheet 33. The multiple second connecting parts 320 are arranged at intervals along the second direction. Each second connecting part 320 may extend a certain length along the first direction, such that one end of the second connecting part 320 is a fixed end and is fixedly connected to the second edge 120, and the other end of the second connecting part 320 is a free end and protrudes a certain length along the first direction relative to the second edge 120. Obviously, the number of the first connecting parts 310 and the number of the second connecting parts 320 are equal, and the second connecting part 320 is used for electrical connection with the circuit board. The extension length of the first connecting part 310 may be greater than or equal to the extension length of the second connecting part 320, and the interval distance between two adjacent first connecting parts 310 may be equal to the interval distance between two adjacent second connecting parts 320. A hole structure may be formed in the second connecting part 320, and the contour of the hole structure may be generally oval or the like.

[0038] In some embodiments, the width of the first connecting part 310 is greater than the width of the second connecting part 320. The width of the first connecting part 310 may also be greater than the width of each differential signal line 31a on the signal group 31, so that the shielding effect of the first connecting part 310 on the signal can be reasonably improved.

[0039] Refer to Figure 5 、 Figure 6 and Figure 7 In some embodiments, the shielding sheet 33 is divided into a plurality of shielding columns 330 arranged at intervals, and there is an interval space between two adjacent shielding columns 330, and a signal group 31 is arranged in the interval space. Generally speaking, a signal group 31 is clamped between two adjacent shielding columns 330. Each shielding column 330 extends along a set curve, and the shape of the curve is similar to the shape of the curve where the signal group 31 is located. It can be generally understood that the curve where the shielding column 330 is located is arranged parallel to the curve where the signal group 31 is located, so that the distance between the curve where the shielding column 330 is located and the curve where the signal group 31 is located is equal everywhere and uniformly arranged. Therefore, the curves where each shielding column 330 is located are parallel to each other, and the curves where each signal group 31 is located are also parallel to each other. The interval between any two adjacent shielding columns 330 may be equal to the interval between any two adjacent signal groups 31.

[0040] For the shielding column 330 located at one of the ends, the shielding column 330 includes a first connection portion 310 and a second connection portion 320, and does not include the shielding ring 200. That is, the first connection portion 310 and the second connection portion 320 are arranged to form the shielding column 330. For the remaining other shielding columns 330, the shielding column 330 includes a first connection portion 310, a second connection portion 320, and at least one shielding ring 200. That is, the first connection portion 310, the second connection portion 320, and at least one shielding ring 200 are arranged to form the shielding column 330. For example, when the number of signal groups 31 is five, the number of shielding columns 330 is five. For the sake of description, the five shielding columns 330 are respectively denoted as the first shielding column, the second shielding column, the third shielding column, the fourth shielding column, and the fifth shielding column, and the first shielding column, the second shielding column, the third shielding column, the fourth shielding column, and the fifth shielding column are arranged in sequence along the first direction. The first shielding column is formed by arranging a first connection portion 310 and a second connection portion 320; the second shielding column is formed by arranging a first connection portion 310, a second connection portion 320, and three shielding rings 200; the third shielding column is formed by arranging a first connection portion 310, a second connection portion 320, and five shielding rings 200; the fourth shielding column is formed by arranging a first connection portion 310, a second connection portion 320, and seven shielding rings 200; the fifth shielding column is formed by arranging a first connection portion 310, a second connection portion 320, and nine shielding rings 200.

[0041] Refer to Figure 5 , Figure 6 and Figure 7 , for the same shielding column 330, the arrangement direction of the shielding ring 200 disposed close to the first connection portion 310 is the same as the extension direction of the first connection portion 310, and the arrangement direction of the shielding ring 200 disposed close to the second connection portion 320 forms an angle with the extension directions of both the first connection portion 310 and the second connection portion 320. For example, for the second shielding column, the third shielding column, the fourth shielding column, and the fifth shielding column, the two shielding rings 200 disposed closest to the first connection portion 310 are both arranged along the second direction, while the remaining other shielding rings 200 are all arranged in a direction forming an angle with the first direction and the second direction. Through this setting, the extension direction of the shielding column 330 can be well adapted to the extension direction of the signal group 31.

[0042] In view of the gap existing between two adjacent shielding rings 200 on the shielding column 330, the width of this gap can be reasonably set so that the signals generated by the signal group 31 are difficult to pass through this gap to interfere with the signals of other signal groups 31. Further, the shielding rings 200 on two adjacent shielding columns 330 can be arranged in a staggered manner. In other words, along the direction perpendicular to the extension direction of the shielding column 330, the orthographic projection of the shielding ring 200 on one shielding column 330 covers the gap between two adjacent shielding rings 200 on the other shielding column 330. For example, it can cover part of this gap or all of this gap, thereby more effectively preventing signals from interfering through this gap. Thus, the anti-interference ability of the shielding sheet 33 against signals is further improved, and the shielding effect of the shielding sheet 33 is thereby improved.

[0043] After the shielding sheet 33 is installed on the insulating carrier 32, there will be a signal group 31 between any two adjacent shielding columns 330, such that the signal group 31 is located in the spaced space between two adjacent shielding columns 330. The signal group 31 does not contact the shielding column 330 and maintains a certain distance. In view of the fact that the shielding ring 200 protrudes a certain height relative to the substrate portion 100, the shielding ring 200 will shield and isolate each signal group 31 to reduce the mutual crosstalk of signals between adjacent signal groups 31, thereby contributing to improving the stability, reliability and anti-interference ability of the communication module 30 and the backplane connector socket 10 during data transmission. At the same time, the first connecting portion 310 can also reduce the mutual crosstalk of signals between adjacent signal groups 31, and the second connecting portion 320 can also reduce the mutual crosstalk of signals between adjacent signal groups 31, thus further improving the stability, reliability and anti-interference ability of the communication module 30 and the backplane connector socket 10 during data transmission. Therefore, the shielding column 330 can reduce signal interference, thereby improving the shielding effect of the shielding sheet 33.

[0044] Since each signal has a return current, and the substrate part 100 serves as part of the return path for the return current. Given that through holes 140 are provided on the substrate part 100, it is equivalent to adding nodes to the return network, that is, increasing the return paths for the return current. The parts of the substrate part 100 without the through holes 140 are interconnected, enabling the return current to switch different return paths on the substrate part 100, which can reduce the radiation effect of the electric field, thereby reducing crosstalk between signals, and thus alleviating the impact caused by impedance mutation. The inductive mutation suffered by the signal is reduced, thereby improving signal transmission, reducing the fluctuation of insertion loss, and improving resonance. At the same time, the setting of the through holes 140 can reasonably reduce the weight of the substrate part 100, thereby realizing the lightweight design of the communication module 30 and the backplane connector socket 10. Of course, the setting of the through holes 140 can serve as a heat transfer channel for the heat generated by the communication module 30 and the backplane connector socket 10, so that the heat generated by the communication module 30 and the backplane connector socket 10 can quickly be discharged to the outside through the through holes 140, thereby improving the heat dissipation effect of the communication module 30 and the backplane connector socket 10 to a certain extent and avoiding the influence on the service life of the communication module 30 and the backplane connector socket 10 due to poor heat dissipation.

[0045] Refer to Figure 5 , Figure 7 and Figure 8 , given that the shielding ring 200 is in a closed-loop shape, the shielding ring 200 is completely arranged around the through holes 140. In this way, the radiation effect of the electric field can be effectively avoided, preventing the signals on one communication module 30 from interfering with the signals on other communication modules 30 through the through holes 140, thereby improving the shielding effect and anti-interference ability of the shielding sheet 33, and ultimately improving the signal transmission effect of the communication module 30 and the backplane connector socket 10. Of course, it can also prevent the signals generated by different signal groups 31 on the same communication module 30 from interfering with each other through the through holes 140.

[0046] Refer to Figure 5 , Figure 7 and Figure 8, in some embodiments, the shielding ring 200 has side plates 210. The number of side plates 210 can be two, and the two side plates 210 can be arranged at intervals along the interval direction of adjacent shielding columns 330. A plurality of through holes 211 are formed in each side plate 210. The through holes 211 penetrate the entire side plate 210 in the thickness direction, so that the through holes 211 communicate the interval space between the two shielding columns 330 and the through holes 140. The through holes 211 can be arranged in a matrix on the side plates 210. Therefore, by providing the through holes 211, on the one hand, the weight of the shielding ring 200 can be reasonably reduced, thereby realizing the lightweight design of the communication module 30 and the backplane connector socket 10. On the other hand, the heat in the interval space between two adjacent shielding columns 330 can flow into the through holes 140 through the through holes 211 to be discharged to the outside, thereby improving the heat dissipation effect of the communication module 30 and the backplane connector socket 10 and avoiding affecting the service life of the communication module 30 and the backplane connector socket 10 due to poor heat dissipation. On the further hand, the caliber of the through holes 211 is reasonable, which can prevent the signals on the signal group 31 from entering the through holes 140 through the through holes 211, thereby avoiding interference between the signals generated by different signal groups 31 on the same communication module 30 and also avoiding interference between the signals generated by the signal groups 31 on different communication modules 30, and improving the shielding effect of the shielding sheet 33. The thickness of the shielding ring 200 is less than or equal to the thickness of the substrate portion 100, so that the weight of the shielding ring 200 can be reasonably reduced on the basis of shielding signals.

[0047] Refer to Figure 5 , Figure 7 and Figure 8 , in some embodiments, the shielding sheet 33 further includes a grid portion 400. The grid portion 400 is connected to the substrate portion 100 and is located in the through holes 140. The grid portion 400 divides the through holes 140 into multiple regions. The extending direction of the grid portion 400 is the same as the extending direction of the shielding columns 330. By providing the grid portion 400, on the one hand, the structural strength of the substrate portion 100 can be reasonably enhanced. On the other hand, since the grid portion 400 will occupy part of the space of the through holes 140, thereby reducing the caliber of the through holes 140 and making it more difficult for signals to pass through the through holes 140, thereby further improving the shielding ability of the through holes 140 to signals and finally improving the shielding effect of the shielding sheet 33.

[0048] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope recorded in this specification.

[0049] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A shielding sheet, characterized in that, Comprising: A substrate portion having a first edge and a second edge, wherein the extending direction of the first edge is arranged at an angle to the extending direction of the second edge, and a plurality of through holes are formed in the substrate portion and penetrate through the substrate portion in the thickness direction and are spaced apart from each other. Shielding rings, corresponding to the through holes one by one, protruding and fixed on the substrate portion and surrounding the through holes. A first connecting portion, spaced along the extending direction of the first edge on the first edge; and A second connecting portion, spaced along the extending direction of the second edge on the second edge; Wherein, the shielding sheet is divided into a plurality of shielding columns which are spaced apart from each other and extend along a set curve, and the first connecting portion and the second connecting portion form the shielding columns, or the first connecting portion, the second connecting portion and at least one of the shielding rings form the shielding columns; The shielding ring is a cylindrical structure with openings at both ends, and the shielding ring is used to be received in the blind hole of the insulating carrier.

2. The shielding sheet according to claim 1, wherein The shielding ring has side plates that define an interval space between two adjacent shielding columns, and through holes penetrating through the side plates in the thickness direction are formed in the side plates, the number of the through holes is multiple, and the multiple through holes are arranged in a matrix.

3. The shielding sheet according to claim 1, characterized in that, It further includes a grid portion, the grid portion is connected to the substrate portion and is located in the through holes, and the grid portion divides the through holes into multiple regions.

4. The shielding sheet according to claim 3, wherein The extending direction of the grid portion is the same as the extending direction of the shielding columns.

5. The shielding sheet according to claim 1, wherein The shielding sheet is integrally formed.

6. The shielding sheet according to claim 1, wherein The thickness of the shielding ring is less than or equal to the thickness of the substrate portion.

7. The shielding sheet according to claim 1, wherein For the same column of the shielding columns, the arrangement direction of the shielding ring close to the first connecting portion is the same as the extending direction of the first connecting portion, and the arrangement direction of the shielding ring close to the second connecting portion is arranged at an angle to both the extending direction of the first connecting portion and the second connecting portion.

8. The shielding sheet according to claim 1, wherein, The first connecting portion is used for electrically connecting with a plug, the second connecting portion is used for electrically connecting with a circuit board, and the extending length of the first connecting portion is greater than the extending length of the second connecting portion.

9. A communication module, characterized in that, Comprising a signal group, an insulating carrier and the shielding sheet according to any one of claims 1 to 8, the shielding sheet is arranged on the insulating carrier, the signal group is multiple, and one signal group is arranged between two adjacent columns of the shielding columns, and the signal group includes two differential signal lines with opposite signal polarities.

10. A backplane connector socket, characterized in that, Comprising a housing and a plurality of communication modules according to claim 9, a plurality of installation grooves are formed in the housing, the installation grooves correspond to the communication modules one by one, and the communication modules are matched with the installation grooves.

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