A low crosstalk high speed backplane connector shielding structure

Abstract

The utility model relates to the field of backplate connector shielding, concretely to a low crosstalk high -speed backplate connector shielding structure, including ground terminal, ground metal shielding sheet, ground terminal and ground metal shielding sheet are provided with two groups, ground metal shielding sheet is wrapped and is arranged in the outside of ground terminal, a plurality of signal terminal pairs are provided to the ground terminal one side stretchout and set up, a plurality of ground terminal grounding feet are provided to the ground terminal top stretchout and set up, the top of ground terminal grounding foot is provided with plastic conductive sheet, a plurality of conductive sheet connecting holes are formed on plastic conductive sheet, and conductive sheet connecting hole inside is formed with conductive sheet connecting hole interference bump, and a plurality of ground metal shielding sheet ground fish eyes have on the ground metal shielding sheet corresponding plastic conductive sheet position. The utility model conductive sheet material is plastic part containing carbon fiber, and is connected with metal shielding sheet and ground terminal through the interference bump on it, and its contact is reliable.

Description

Technical Field

[0001] This utility model relates to the field of backplane connector shielding, and in particular to a low crosstalk high-speed backplane connector shielding structure. Background Technology

[0002] In the digital age, high-speed backplane connectors serve as crucial hubs for data transmission, and their performance directly impacts the data processing and interaction efficiency of the entire system. Currently, with the rapid development of cutting-edge fields such as 5G communication, artificial intelligence, and big data centers, the demand for signal transmission rates from high-speed backplane connectors is increasing exponentially. From the simple circuit connections of early computers to the close collaboration of GPU clusters within today's AI servers, the transmission rate of backplane connectors has evolved from its initial relatively low level.

[0003] In the pursuit of high-speed transmission, the design of anti-crosstalk capability between signal pairs has become a core technical aspect of high-speed connector design. As signal transmission rates increase, crosstalk issues in the backplane connector pin area become increasingly prominent, gradually becoming a major bottleneck restricting signal integrity. Crosstalk, essentially, is an interference phenomenon caused by electromagnetic coupling, specifically manifested as signal crosstalk between adjacent signal lines. This phenomenon leads to signal distortion, increased bit error rate, and in severe cases, even a significant deterioration in system performance. In the pin area of ​​high-speed backplane connectors, due to the extremely small pin spacing, high signal rate, and rapid current changes, capacitive and inductive coupling coexist, and the crosstalk effect significantly intensifies with increasing signal frequency.

[0004] To address this challenge, traditional 2D shielding technology was once widely used. It primarily attempts to block electromagnetic coupling by adding a metal shielding layer to a specific plane. However, with the continuous increase in connector transmission rates, the limitations of 2D shielding technology have become increasingly apparent. When faced with the complex electromagnetic field distribution of high-frequency signals, its shielding effect is significantly reduced, making it difficult to meet increasingly stringent requirements for crosstalk immunity. Utility Model Content

[0005] The purpose of this invention is to provide a low-crosstalk, high-speed backplane connector shielding structure to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A low-crosstalk high-speed backplane connector shielding structure includes a grounding terminal and a grounding metal shield. Two sets of grounding terminals and grounding metal shields are provided. The grounding metal shield is wrapped around the outside of the grounding terminal. Several signal terminal pairs extend from one side of the grounding terminal, and several grounding terminals with grounding feet extend from the top of the grounding terminal. A plastic conductive sheet is provided on the top of each grounding foot. Several conductive sheet connection holes are formed on the plastic conductive sheet, and interference protrusions are formed inside the conductive sheet connection holes. Several grounding fisheyes are provided on the grounding metal shield corresponding to the positions of the plastic conductive sheet. The grounding fisheyes of the grounding metal shield are inserted into the plastic conductive sheet and engage with the interference protrusions of the conductive sheet connection holes. The inner side of the grounding fisheyes of the grounding metal shield contacts and engages with the grounding feet of the grounding terminal.

[0008] Preferably, the signal terminal pair is formed with the grounding terminal, the signal terminal pair is provided as two independent pairs, and the top of the signal terminal pair has a hook-shaped structure.

[0009] Preferably, the grounding fisheye of the grounding metal shielding sheet and the interference protrusion of the conductive sheet connection hole on the plastic conductive sheet are interference fit.

[0010] Preferably, the grounding metal shielding sheet is snapped onto the outside of the grounding terminal.

[0011] Preferably, the conductive sheet on the plastic conductive sheet has a set of 3 conductive sheet connection holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The conductive sheet is made of plastic containing carbon fiber, and it is connected to the metal shielding sheet and grounding terminal by hard interference through the interference bumps on it, so that the contact is reliable;

[0014] 2. The conductive sheet is made of plastic containing carbon fiber. It is connected to the metal shield and grounding terminal by hard interference through the interference bumps on it. The structure is simple and compact, which can effectively improve the signal pair density of the connector.

[0015] 3. 4D three-dimensional shielding is achieved for the signal pairs, further enhancing the anti-crosstalk capability between signal pairs, thereby achieving the connector's high transmission rate design goal. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the grounding terminal structure of the low crosstalk high-speed backplane connector shielding structure described in this utility model;

[0018] Figure 2 This is a schematic diagram of the interference bump structure of the conductive sheet connection hole of the shielding structure of the low crosstalk high-speed backplane connector described in this utility model.

[0019] Figure 3 This is a schematic diagram of the grounding metal shielding sheet structure of the low crosstalk high-speed backplane connector shielding structure described in this utility model;

[0020] Figure 4 This is a schematic diagram of the grounding metal shielding sheet grounding fisheye structure of the low crosstalk high-speed backplane connector shielding structure described in this utility model.

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Signal terminal pair; 2. Grounding terminal; 3. Plastic conductive sheet; 4. Interference protrusions of conductive sheet connection hole; 5. Grounding terminal grounding pin; 6. Grounding metal shielding sheet grounding fisheye; 7. Grounding metal shielding sheet. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] like Figures 1-4 As shown, a low crosstalk high-speed backplane connector shielding structure includes a grounding terminal 2 and a grounding metal shield 7. Two sets of grounding terminals 2 and grounding metal shield 7 are provided. The grounding metal shield 7 is wrapped around the outside of the grounding terminal 2. Several signal terminal pairs 1 extend from one side of the grounding terminal 2, and several grounding terminal grounding feet 5 extend from the top of the grounding terminal 2. A plastic conductive sheet 3 is provided on the top of the grounding terminal grounding feet 5. Several conductive sheet connection holes are formed on the plastic conductive sheet 3, and interference protrusions 4 are formed inside the conductive sheet connection holes. Several grounding metal shield grounding fisheyes 6 are provided on the grounding metal shield 7 corresponding to the positions of the plastic conductive sheet 3. The grounding metal shield grounding fisheyes 6 are inserted into the plastic conductive sheet 3 and cooperate with the interference protrusions 4 of the conductive sheet connection holes. The inner side of the grounding metal shield grounding fisheyes 6 contacts and cooperates with the grounding terminal grounding feet 5.

[0027] In this embodiment, signal terminal pair 1 is formed with ground terminal 2, and there are two independent signal terminal pairs 1. The top of signal terminal pair 1 has a hook-shaped structure.

[0028] In this embodiment, the grounding fisheye 6 of the grounding metal shielding sheet and the interference protrusion 4 of the conductive sheet connection hole on the plastic conductive sheet 3 are interference-fitted.

[0029] In this embodiment, the grounding metal shield 7 is snapped onto the outside of the grounding terminal 2.

[0030] In this embodiment, the conductive sheet connection hole on the plastic conductive sheet 3 is a set of 3.

[0031] Working principle: To improve the anti-crosstalk capability between signal pairs of this high-speed backplane connector, this 4D anti-crosstalk structure was designed to achieve three-dimensional shielding of the signal pairs in four directions. The interference protrusions 4 of the conductive sheet connection hole on the plastic conductive sheet 3 are connected to the grounding terminal grounding foot 5 on the grounding terminal 2 and the grounding metal shielding plate grounding fisheye 6 on the grounding metal shielding plate 7 through interference connection, thereby connecting the five grounding terminals 2 and the two grounding metal shielding plates 7 together, thereby achieving 4D three-dimensional shielding of the signal terminal pairs.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A low-crosstalk, high-speed backplane connector shielding structure, characterized in that: The device includes a grounding terminal (2) and a grounding metal shield (7). The grounding terminal (2) and the grounding metal shield (7) are provided in two sets. The grounding metal shield (7) is wrapped around the grounding terminal (2). Several signal terminal pairs (1) are provided on one side of the grounding terminal (2). Several grounding terminal grounding feet (5) are provided on the top of the grounding terminal (2). A plastic conductive sheet (3) is provided on the top of the grounding terminal grounding feet (5). Several conductive sheet connection holes are formed on the plastic conductive sheet (3). Interference protrusions (4) of the conductive sheet connection holes are formed on the inner side of the conductive sheet connection holes. Several grounding metal shield grounding fisheyes (6) are provided on the grounding metal shield (7) corresponding to the position of the plastic conductive sheet (3). The grounding metal shield grounding fisheyes (6) are inserted into the plastic conductive sheet (3) and cooperate with the interference protrusions (4) of the conductive sheet connection holes. The inner side of the grounding metal shield grounding fisheyes (6) is in contact with the grounding terminal grounding feet (5).

2. The low crosstalk high-speed backplane connector shielding structure according to claim 1, characterized in that: The signal terminal pair (1) is formed with the grounding terminal (2), and there are two independent signal terminal pairs (1). The top of the signal terminal pair (1) is a hook-shaped structure.

3. The low crosstalk high-speed backplane connector shielding structure according to claim 2, characterized in that: The grounding fisheye (6) of the grounding metal shielding sheet is interference-fitted with the interference protrusion (4) of the conductive sheet connection hole on the plastic conductive sheet (3).

4. The low crosstalk high-speed backplane connector shielding structure according to claim 3, characterized in that: The grounding metal shield (7) is snapped onto the outside of the grounding terminal (2).

5. The low crosstalk high-speed backplane connector shielding structure according to claim 1, characterized in that: The conductive sheet (3) has a set of 3 conductive sheet connection holes.

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