Grounding connection structure applied to crosstalk suppression of electric connector

Abstract

The utility model relates to a ground connection structure applied to crosstalk suppression of an electric connector, which comprises a connecting piece and a plurality of contact pieces, the contact pieces are used as ground structures, at least one pair of differential lines of the electric connector is arranged between two adjacent contact pieces, the connecting piece has conductivity, and the connecting piece is connected with any two adjacent contact pieces. According to the utility model, adjacent grounds are short-circuited through a simple metal structure, so that reverse currents in the grounds at the left and right sides of the same pair of differential lines are mutually counteracted, the corresponding current intensity in the ground structure is reduced, and the crosstalk of the differential lines to adjacent differential lines is reduced.

Description

Technical Field

[0001] The present application relates to a ground connection structure applied to crosstalk suppression of electrical connectors, belonging to the technical field of electrical signal transmission devices. Background Art

[0002] For electrical connectors, low crosstalk between signal lines is a prerequisite for ensuring the transmission of high-speed signals. With the increase in power density and transmission rate of high-speed connectors, the spacing between each signal line inside the electrical connector becomes smaller and smaller, resulting in more and more serious crosstalk between the internal signal lines. For example, some of the signals inside the electrical connector are mainly differential signals, and adjacent differential signals are isolated by a ground structure. The differential pairs affect each other through the ground structure, which is likely to cause crosstalk.

[0003] Specifically, in an ideal differential transmission line, the two conductors (positive differential line and negative differential line) should have the same characteristic impedance and match the impedance of the signal source and the load. In fact, due to the influence of the structure and design of high-speed connectors, the differential transmission line cannot achieve perfect characteristic impedance matching. When the characteristic impedance of the differential line does not match, the signal will encounter reflection and transmission loss during transmission, affecting the signal integrity. When the signal encounters an impedance discontinuity point on the transmission line, part of the signal will be reflected back to form a standing wave. At certain frequencies, the standing wave phenomenon may cause the voltage and current on the transmission line to reach a resonance state, that is, resonance. Due to the existence of standing waves and resonances, the signals on the differential lines may affect adjacent differential lines through the ground structure. This kind of influence is usually due to the discontinuity or non-uniformity of the ground structure, resulting in crosstalk when the signal propagates in the ground structure.

[0004] In response to the above crosstalk problem, the solutions of the prior art include: increasing the spacing between differential pairs; adding a specific ground structure (such as electromagnetic bandgap) inside the high-speed connector; adding a metal shielding structure, etc. Due to the high power density limitation of high-speed connectors, the increase in the spacing between differential pairs is limited, and the improvement of crosstalk is limited. Moreover, specific ground structures and metal shielding structures will pose challenges to the design and process of high-speed connectors. Summary of the Utility Model

[0005] The present utility model provides a ground connection structure applied to crosstalk suppression of electrical connectors, aiming to solve at least one of the technical problems existing in the prior art. For example, the ground connection structure applied to crosstalk suppression of electrical connectors proposed by the present utility model shorts adjacent grounds through a simple metal structure, so that the reverse currents in the grounds on the left and right sides of the same differential pair cancel each other out, reducing the corresponding current intensity in its ground structure and reducing the crosstalk of the differential line pair to adjacent differential lines.

[0006] One aspect of the technical solution of the present utility model relates to a ground connection structure applied to crosstalk suppression of electrical connectors, which includes:

[0007] As multiple contacts of the ground structure, at least one pair of differential lines of the electrical connector are arranged between two adjacent ones of the contacts;

[0008] A conductive connecting member that connects any two adjacent ones of the contacts.

[0009] Furthermore, the contact includes multiple ground contact points, the connecting member includes a connecting frame, and the connecting frame connects all the ground contact points.

[0010] Furthermore, the contact includes a pad member for connecting to a circuit board, and the ground contact points are arranged on the pad member.

[0011] Furthermore, the connecting frame is provided with contact through holes allowing conductive members connected to the differential lines to pass through.

[0012] Furthermore, the pad member is provided with differential contact points, and the differential contact points of the same pair are arranged in the same contact through hole.

[0013] Furthermore, two adjacent ones of the conductive members are respectively in contact with two differential contact points in the same contact through hole.

[0014] Furthermore, the contact includes multiple ground conducting members connected to a shielding member of a transmission cable, and the connecting member includes a connecting frame that connects all the ground conducting members.

[0015] Furthermore, the connecting frame includes multiple bumps and a connecting rod connecting the multiple bumps.

[0016] Furthermore, each of the bumps is connected to each of the ground conducting members.

[0017] Furthermore, it further includes a conductive member connected to the differential lines, and the ground conducting member is parallel to the conductive member.

[0018] The beneficial effects produced by the technical solution of the present utility model are at least as follows.

[0019] The grounding connection structure of the present utility model applied to crosstalk suppression of an electrical connector, based on the principle that the directions of ground currents on the left and right sides of the differential lines are opposite, shorts the left and right sides of the ground, and the reverse currents in the ground cancel each other out, thereby reducing the resonant current in the ground structure of the high-speed connector. By shorting adjacent grounds through a simple metal structure, the reverse currents in the grounds on the left and right sides of the same pair of differential lines cancel each other out, reducing the corresponding current intensity in its ground structure and reducing the crosstalk of the differential lines to adjacent differential lines. It realizes crosstalk suppression of the electrical connector by adding a connecting member with a simple structure to short two contacts with opposite current directions. Description of the Drawings

[0020] Figure 1It is a schematic structural diagram of a spacer and a spring piece of an electrical connector according to an embodiment of the present invention.

[0021] Figure 2 It is a cross-sectional structural view of a spacer and a spring piece of an electrical connector according to an embodiment of the present invention.

[0022] Figure 3 It is a schematic structural diagram of an elastic contact plate and a plastic part of an electrical connector according to an embodiment of the present invention.

[0023] Figure 4 It is a cross-sectional structural view of a spacer and an elastic contact plate of an electrical connector according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic structural diagram of a spacer and a wire clamping plate of an electrical connector according to an embodiment of the present invention.

[0025] Figure 6 It is a schematic structural diagram of a gasket and a connecting frame of an electrical connector according to an embodiment of the present invention.

[0026] Figure 7 It is a schematic structural diagram of a gasket, a connecting frame and a conductive part in an embodiment of the present invention.

[0027] Figure 8 It is a schematic structural diagram of a ground guide part and a connecting frame according to an embodiment of the present invention.

[0028] Figure 9 It is a schematic structural diagram of a circuit board according to an embodiment of the present invention.

[0029] Figure 10 It is a simple diagram showing the direction of the ground current inside the electrical connector according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 100, electrical connector; 110, metal shell; 120, plastic part; 121, positioning auxiliary groove; 130, circuit board; 140, conductive part; 150, transmission cable; 15 1, differential line; 152, shielding part;

[0032] 200, contact part; 210, spacer; 220, gasket; 221, differential contact point; 230, ground guide part;

[0033] 300, connecting part; 310, spring piece; 320, elastic contact plate; 321, connecting plate; 330, wire clamping plate; 340, connecting frame; 341, contact through hole; 350, connecting frame; 351, convex block; 352, connecting rod. Detailed implementation manners

[0034] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, solution and effects of the present utility model. It should be noted that, without conflict, the embodiments in this article and the features in the embodiments can be combined with each other.

[0035] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, top, bottom, etc. described in this article are only relative to the mutual positional relationship of the components of the present utility model in the drawings.

[0036] In addition, unless otherwise defined, all technical and scientific terms used in this article have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of this article are only for describing specific embodiments, rather than for limiting the present utility model. The term "and / or" used in this article includes any combination of one or more of the related listed items.

[0037] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various elements, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, without departing from the scope of this disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0038] See Figures 1 to 10 , the grounding connection structure for crosstalk suppression of an electrical connector in the technical solution of the present utility model includes a connecting member 300 and a plurality of contact members 200. The contact members 200 serve as the ground structure. At least one pair of differential lines 151 of the electrical connector 100 are arranged between two adjacent contact members 200. The connecting member 300 has conductivity, and the connecting member 300 connects any two adjacent contact members 200. The present utility model electrically connects the contact members 200 adjacent to both sides of the same pair of differential lines 151 serving as the ground structure through the connecting member 300. It shorts adjacent grounds through a simple metal structure, so that the reverse currents in the grounds on the left and right sides of the same pair of differential lines 151 cancel each other out, reducing the corresponding current intensity in the ground structure and reducing the crosstalk of the differential lines 151 to the adjacent differential lines 151.

[0039] See Figure 1, the electrical connector 100 includes a plug assembly and a socket assembly. The plug assembly is connected to the socket assembly to achieve signal transmission. Specifically, the plug assembly is used to connect the transmission cable 150. One end of the transmission cable 150 is connected to the conductive member 140 in the plug assembly. The socket assembly is used to connect the circuit board 130. The circuit board 130 is connected to the pad member 220 in the socket assembly. The plug assembly is inserted into the socket assembly, and the other end of the conductive member 140 is connected to the pad member 220, thereby achieving signal transmission.

[0040] See Figure 1 and Figure 9 , the two contacts of the circuit board 130 as a differential pair are respectively connected to one end of two conductive members 140 (as a group of conductive members 140). Two signal lines are provided in the transmission cable 150 as a pair of differential lines 151. The other ends of the two conductive members 140 are respectively connected to the two signal lines in the transmission cable 150. In the present utility model, the shielding structure in the transmission cable 150 is grounded. Among them, the shielding layer is wrapped in the outermost insulating layer of the transmission cable 150, and an insulating medium is provided between the signal line and the shielding layer. The contacts in the circuit board 130 are correspondingly arranged such that each pair of differential pairs is spaced from each GND ground, that is, a pair of differential contacts 221 is provided between two ground contacts (see Figure 9 the GND in).

[0041] In some embodiments, spacers 210 as a ground structure are provided inside both the plug assembly and the socket assembly. A plurality of spacers 210 are spliced to form an independent space for shielding. Each group of conductive members 140 is respectively arranged in an independent space, which can form an enclosure and separation for the conductive members 140, playing a good role in shielding interference. The spacer 210 in the high-speed connector includes a plug spacer 210 and a socket spacer 210. The spacer 210 is connected to the ground contact of the circuit board 130. A pair of differential lines 151 of the same pair is provided between the two spacers 210 as the ground structure of the electrical connector 100. See Figure 10 (Briefly indicated), the red arrow represents the direction of the ground current. Then, the current directions of the adjacent two grounds in the pair of differential lines 151 in the high-speed connector are opposite. Due to the influence of the structure and design of the existing high-speed connector, the differential transmission line cannot achieve perfect characteristic impedance matching. Therefore, standing wave phenomena, that is, resonance, are likely to occur in the ground structure, resulting in the differential line 151 attacking the adjacent differential line 151 and other differential lines 151 through the ground structure, thereby forming crosstalk. Among them, for the differential line 151 with the closest distance, it is most affected by crosstalk. When the signal in the differential line changes, a return current will be generated in the ground structure. It can be understood that when the differential signal current flows through a structure with unmatched characteristic impedance, the signal current (which includes the current in the signal path and the signal return path) may all generate reflection phenomena. See Figure 9, in the present invention, the signals are equally spaced according to GSSD (i.e., in the order of GND, differential signal +, differential signal -, GND). There is a ground structure around the differential signal lines, and even if the ground structure is close to the differential signal lines, corresponding currents will inevitably be generated in the ground structure. Then, the currents flowing through the four paths of the above GSSD are of the same magnitude, and the current directions of adjacent conductors are opposite.

[0042] Specifically, crosstalk will cause the signals in the differential lines to induce currents in the adjacent differential lines and the ground structure. Such induced currents may form a circulating current in the ground structure, especially where the ground structure is uneven or there is impedance discontinuity, that is, if the ground structure is discontinuous or there is impedance mismatch, these return currents may form a circulating current in the ground structure, resulting in opposite current directions in the adjacent ground structures of the same pair of differential lines. Among them, adjacent differential pairs will share a single-sided signal return path. For example Figure 9 for differential pair 1 and differential pair 2 in

[0043] The utility model uses a connector 300 to electrically connect two adjacent contact members 200 that serve as the ground structure, and shorts the adjacent grounds through a simple metal structure, so that the reverse currents in the grounds on the left and right sides of the same pair of differential lines 151 cancel each other out, reducing the corresponding current intensity in the ground structure and reducing the crosstalk of the differential line 151 to the adjacent differential line 151. It should be noted that the position where the adjacent ground structures are shorted can be any position, and shorting the standing wave point has the best improvement effect on crosstalk.

[0044] In some embodiments, the electrical connector 100 includes a connector 300, a metal shell 110, and a plurality of spacers 210 that serve as contact members 200. The connector 300 connects the metal shell 110 and the spacers 210. For example, referring to Figures 1 to 2 , the metal shell 110 is a conductive metal base in the socket assembly, the contact member 200 is a spacer 210 in the plug assembly for separating the conductive members 140, and the spacer 210 is connected to the ground contact point of the circuit board 130 and can serve as the ground conductor (i.e., the ground structure) of the electrical connector 100. When the plug assembly is inserted into the socket assembly, the spacer 210 enters the inner cavity of the metal shell 110. By adding a connector 300 to the side of the spacer 210 and touching the metal shell 110 through the connector 300, the spacer 210 is shorted, thereby realizing the shorting of the adjacent ground structures.

[0045] In some specific embodiments, the connector 300 may include a plurality of elastic sheets 310 having conductivity, such as metal elastic sheets 310. One side of each elastic sheet 310 is connected to the side edge of the spacer 210, which is equivalent to a long branch at the side edge of the spacer 210 serving as the ground structure. The other side of the elastic sheet 310 allows elastic contact with the metal base, thereby realizing the short circuit of the ground structure. It can be understood that one elastic sheet 310 can be connected to each of the opposite sides of the spacer 210, so that both sides of the spacer 210 are electrically connected to the metal shell 110. It should be noted that the spacer 210 and the elastic sheet 310 may be an integrated structure.

[0046] Here, a specific embodiment is used for illustration. Refer to Figures 1 to 2 , the plug assembly includes a plug housing and a plurality of spacers 210. The plug housing can be a plastic housing, and the socket assembly includes a socket housing, which can be a metal shell 110. The insertion end of the plug housing is provided with a positioning auxiliary groove 121 (refer to Figure 3 ), the spacer 210 is arranged in the plug housing, and the elastic sheet 310 is arranged outside one end of the spacer 210 close to the insertion end of the plug housing, so that the elastic sheet 310 can pass through the positioning auxiliary groove 121 and be exposed outside the plug housing. When the plug assembly is inserted into the socket assembly, the plug housing enters the socket housing, and at the same time, the exposed elastic sheet 310 can contact the socket housing, thereby connecting the spacer 210 and the metal shell 110 through the elastic sheet 310, realizing the short circuit of adjacent spacers 210 serving as the ground structure.

[0047] In some embodiments, the electrical connector 100 includes a connector 300 and a plurality of spacers 210. The connector 300 is used to connect the plurality of spacers 210, thereby short-circuiting the plurality of spacers 210 serving as the ground structure. Further, the connector 300 includes a plurality of elastic contact plates 320 and a connecting plate 321 connecting the plurality of elastic contact plates 320. The number of elastic contact plates 320 corresponds to the number of spacers 210, and each elastic contact plate 320 is connected to one side of each spacer 210. Refer to Figure 3 and Figure 4 , the connecting plate 321 is in the shape of a long strip-like plate. A plurality of elastic contact plates 320 are connected to the long sides on the same side of the connecting plate 321. When the elastic contact plates 320 contact two adjacent spacers 210, the adjacent spacers 210 are short-circuited through the connecting plate 321, thereby short-circuiting two adjacent grounds with opposite current directions.

[0048] In some specific embodiments, the connecting plate 321 can be fixed to the plastic part 120 of the electrical connector 100. For example, refer to Figure 2 and Figure 3, the plug housing is a plastic housing. The connecting plate 321 can be fixed to the outside of the plug housing. The spacer 210 is arranged inside the plug housing. The insertion end of the plug housing is provided with a positioning auxiliary groove 121. The upper side of the elastic contact plate 320 is connected to the connecting plate 321, and the lower side of the elastic contact plate 320 passes through the positioning auxiliary groove 121 and contacts the side of the spacer 210. Among them, the connecting plate 321 is provided with connecting through holes. The connecting plate 322 is fixed to the plastic part 120 (such as the plug housing) by the cooperation of a connecting column (such as a screw) and the connecting through holes. Further, the connecting through holes can also be deformed by a jig and pierced into the plastic part 120. Further, by dropping molten plastic or strong glue into the connecting through holes, etc., the connecting plate 322 is attached to the plug housing, so that the connection is more firm.

[0049] In some embodiments, referring to Figure 5 , the connecting member 300 includes a wire clamping plate 330. The wire clamping plate 330 contacts a plurality of spacers 210 to realize the short circuit of the ground structures with opposite currents. Specifically, the wire clamping plate 330 can be a metal plate. A plurality of spacers 210 are arranged in parallel. The wire clamping plate 330 is clamped to one side of the plurality of spacers 210 to realize the short circuit of the plurality of spacers 210.

[0050] In some embodiments, the contact member 200 includes a plurality of ground contacts. The connecting member 300 includes a connecting frame 340. The connecting frame 340 connects all the ground contacts. Further, the contact member 200 includes a pad member 220 for connecting to the circuit board 130. A plurality of ground contacts are arranged on the pad member 220. The connecting member 300 includes a connecting frame 340. The connecting frame 340 connects all the ground contacts. Referring to Figures 5 to 9 , on both sides of each differential pair in the circuit board 130, there is ground. The ground currents on both sides have opposite directions. Correspondingly, a plurality of ground contacts and differential contacts 221 are arranged on the pad member 220. The circuit board 130 is connected to the conductive member 140 through the differential contacts 221 on the pad member 220. The ground contacts can be connected to a plurality of spacers 210 serving as the ground structure. By connecting all the ground contacts through the connecting plate 321, the short circuit of the ground with opposite current directions can be realized.

[0051] In some specific embodiments, referring to Figure 7 , the connecting frame 340 is provided with contact through holes 341 allowing the conductive member 140 connected to the differential line 151 to pass through. Specifically, the connecting frame 340 is in the shape of a quasi-flat plate. A plurality of contact through holes 341 are arranged on the connecting frame 340. When the connecting frame 340 is connected to the pad member 220, the connecting frame 340 covers all the ground contacts, and the differential contacts 221 are exposed through the contact through holes 341. The conductive member 140 passes through the contact through holes 341 and contacts the differential contacts 221. Further, two differential contacts 221 are arranged in one contact through hole 341, and two conductive members 140 of the same differential pair contact the above two differential contacts 221.

[0052] In some embodiments, the contact member 200 includes a plurality of ground conductors 230 connected to the shield 152 of the transmission cable 150, and the connecting member 300 includes a connecting frame 350 that connects all the ground conductors 230. For example, refer to Figure 8 , a plurality of elastic conductors are provided in the electrical connector 100, and the transmission cable 150 and the circuit board 130 are connected through the elastic conductors. The elastic conductors include conductive members 140 and ground conductors 230. The conductive members 140 are used to connect the differential lines 151 of the transmission cable 150 and the differential contacts 221 of the circuit board 130. The ground conductors 230 are used to connect the shield 152 of the transmission cable and the ground contacts of the circuit board 130. Two ground conductors 230 are respectively arranged on both sides of the two conductive members 140 connecting the same pair of differential lines 151, and the current directions of the two adjacent ground conductors 230 are opposite. By short-circuiting the plurality of ground conductors 230 through the connecting member 300, crosstalk can be effectively suppressed. It can be understood that the ground conductors 230 can be parallel to the conductive members 140.

[0053] In some specific embodiments, refer to Figure 8 , the connecting frame 350 includes a plurality of bumps 351 and a connecting rod 352 connecting the plurality of bumps 351. The number of bumps 351 corresponds to the number of ground conductors 230. Each bump 351 is connected to each ground conductor 230, so as to short-circuit the two ground conductors 230 serving as the ground structure with opposite current directions. Specifically, the connecting rod 352 is a square rod shape. One side of the connecting rod 352 is connected with a plurality of bumps 351, and the other side of the bump 351 is in contact with the outer side of the ground conductor 230, so as to short-circuit two adjacent ground conductors 230 with opposite current directions.

[0054] In the connection structure for suppressing crosstalk of the electrical connector in the practical embodiment of the present invention, the position where the connecting member 300 short-circuits the ground structure is the short-circuit at any position in the adjacent ground structure. In some embodiments, the position where the connecting member 300 short-circuits the ground structure is the short-circuit at the resonance point in the adjacent ground structure. In some embodiments, the position where the connecting member 300 short-circuits the ground structure is the short-circuit of the adjacent ground structure in the transition region. For example, in the transition region where the gasket 200 is connected to the conductive member 140, all the ground structures are short-circuited through the connecting frame 340 serving as the connecting member 300 to achieve the short-circuit of the adjacent ground structures in the transition region. For example, in the transition region where the plug assembly is connected to the socket assembly, the spacer 210 and the metal shell 110 are short-circuited through the elastic piece 310 serving as the connecting member 300 to achieve the short-circuit of the adjacent ground structures in the transition region. For example, in the transition region where the conductive member 140 is connected to the transmission cable 150, all the ground structures are short-circuited through the wire clamping plate 330 serving as the connecting member 300 to achieve the short-circuit of the adjacent ground structures in the transition region. It should be noted that the above structures are only for illustration and are not specifically limited.

[0055] As described above, these are only the preferred embodiments of the present application. The present application is not limited to the above-described implementation manners. As long as the same means are used to achieve the technical effects of the present application, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. All of them shall fall within the scope of protection of the present application. Within the scope of protection of the present application, various different modifications and changes may be made to its technical solutions and / or implementation manners.

Claims

1. A grounding connection structure applied to crosstalk suppression of an electrical connector, characterized in that, Comprising: A plurality of contact members (200) as ground structures, with at least one pair of differential lines (151) of the electrical connector (100) disposed between two adjacent ones of the contact members (200); A conductive connecting member (300) that connects any two adjacent ones of the contact members (200).

2. The ground connection structure for crosstalk suppression of an electrical connector according to claim 1, wherein The contact member (200) includes a plurality of ground contact points, and the connecting member (300) includes a connecting frame (340) that connects all of the ground contact points.

3. The ground connection structure for crosstalk suppression of an electrical connector according to claim 2, wherein The contact member (200) includes a pad member (220) for connecting to a circuit board (130), and the ground contact points are disposed on the pad member (220).

4. The ground connection structure for crosstalk suppression of an electrical connector according to claim 3, wherein The connecting frame (340) is provided with contact through-holes (341) that allow conductive members (140) connected to the differential lines (151) to pass through.

5. The ground connection structure for crosstalk suppression of an electrical connector according to claim 4, wherein The pad member (220) is provided with differential contact points (221), and the differential contact points (221) of the same pair are disposed within the same contact through-hole (341).

6. The ground connection structure for crosstalk suppression of an electrical connector according to claim 5, wherein Two adjacent ones of the conductive members (140) are respectively in contact with two of the differential contact points (221) disposed within the same contact through-hole (341).

7. The ground connection structure for crosstalk suppression of an electrical connector according to claim 1, wherein The contact member (200) includes a plurality of ground guiding members (230) connected to a shielding member (152) of a transmission cable (150), and the connecting member (300) includes a connecting frame (350) that connects all of the ground guiding members (230).

8. The ground connection structure for crosstalk suppression of an electrical connector according to claim 7, wherein The connecting frame (350) includes a plurality of bumps (351) and a connecting rod (352) that connects the plurality of bumps (351).

9. The ground connection structure for crosstalk suppression of an electrical connector according to claim 8, wherein Each of the bumps (351) is connected to each of the ground guiding members (230).

10. The ground connection structure for crosstalk suppression of an electrical connector according to claim 7, wherein It further includes a conductive member (140) connected to the differential line (151), and the ground guiding member (230) is parallel to the conductive member (140).

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