A low crosstalk signal pair unit, assembly and high speed cable connector thereof

Abstract

This invention discloses a low-crosstalk signal pair unit, a signal pair unit assembly, and a high-speed cable connector. It includes a pair of spacer terminals with a front contact portion and a rear retaining portion, a shielded differential pair cable, an insulating support frame for fixing the spacer terminal pair and positioning the shielded differential pair cable, a three-sided open grounding shield cavity, an insulating body encapsulated on a set of signal pair units, and a housing for mounting the signal pair units or signal pair unit assembly. The connection between the contact portion and the retaining portion ensures that the spacer terminals of the signal pair units are sufficiently short. This invention reduces crosstalk between spacer terminals in adjacent signal pair units by eliminating the non-functional body portion of the terminal pair in existing signal pair units and by removing the notch on the side wall of the U-shaped grounding shield cavity.

Description

Technical Field

[0001] This invention relates to the field of backplane connector technology, and more specifically, to a low crosstalk signal pair unit, its components, and a high-speed cable connector for backplane applications. Background Technology

[0002] Existing signal pair unit technologies, such as those disclosed in Chinese Patent CN105531875B (which describes a signal pair unit and a connector using a signal pair unit) and Chinese Patent CN107257038B (which also discloses a signal pair unit), suffer from crosstalk between signal pair units. However, with increasingly higher data transmission rates and shorter signal rise times on communication backplanes, these existing signal pair units will fail to meet the requirements of communication equipment for cable assembly connectors due to their limitations. Summary of the Invention

[0003] The purpose of this invention is to provide a low-crosstalk signal pair unit, its components, and a high-speed cable connector to solve the technical problem of excessive crosstalk between signal pair units in the prior art.

[0004] The present invention solves the above problems through the following technical solution:

[0005] A low crosstalk signal pair unit includes: a pair of spacer terminals, each spacer terminal including a contact portion disposed at a front end and a retaining portion disposed at a rear end, the contact portion and the retaining portion being directly connected; an insulating support frame formed on the retaining portion of the pair of spacer terminals and positioning a shielded differential pair cable; a grounding shield cavity with three open sides, the grounding shield cavity having a bottom and a pair of opposing cavity walls connected to the bottom, the insulating support frame, the pair of spacer terminals held by the insulating support frame, and a portion of the shielded differential pair cable positioned by the insulating support frame and connected to the pair of spacer terminals being disposed within the grounding shield cavity.

[0006] As a further improvement of the present invention, a fixing structure is provided on the grounding shield cavity to fix the insulating support frame in the grounding shield cavity; an electrical connection structure is provided on the grounding shield cavity to be electrically connected to the shielded differential pair cable shield.

[0007] As a further improvement of the present invention, the electrical connection structure includes a first electrical connection structure and a second electrical connection structure. The first electrical connection structure is located at one end of the insulating support frame that positions and shields the differential pair cable, and the second electrical connection structure is located at the open end of the grounding shield cavity away from the spacer terminal.

[0008] As a further improvement of the present invention, no through holes or through slots are provided on the pair of opposing cavity walls of the grounding shield cavity.

[0009] As a further improvement of the present invention, the insulating support frame is provided with a positioning structure, which is used to position the shielded differential pair cable.

[0010] In addition, the present invention also solves the above problems through the following technical solutions:

[0011] A low crosstalk signal pair unit assembly includes a set of signal pair units and an insulating body encapsulated on the set of signal pair units;

[0012] Each signal pair unit includes:

[0013] A pair of spacer terminals, each spacer terminal including a contact portion disposed at a front end and a retaining portion disposed at a rear end, the contact portion and the retaining portion being directly connected; an insulating support frame formed on the retaining portion of the pair of spacer terminals and positioning a shielded differential pair cable; a grounding shield cavity with three open sides, the grounding shield cavity having a bottom and a pair of opposing cavity walls connected to the bottom, the insulating support frame, the pair of spacer terminals held by the insulating support frame, and a portion of the shielded differential pair cable positioned by the insulating support frame and connected to the pair of spacer terminals, are disposed within the grounding shield cavity.

[0014] As a further improvement of the invention, each group of signal pair units in the signal pair unit assembly is arranged in a row, each grounded shield cavity of the signal pair unit is electrically connected, and the insulating body is encapsulated at one end of the shielded differential pair cable that is fixed.

[0015] As a further improvement of the present invention, the insulating body is provided with a fixing structure, which is connected to the shell.

[0016] In addition, the present invention also solves the above problems through the following technical solutions:

[0017] A high-speed cable connector includes a low-crosstalk signal pair unit as described above, and the high-speed cable connector further includes:

[0018] A housing with an A-pair plug and an A-holding end. The A-holding end has a plurality of array holes through which signal pair units are arranged in rows.

[0019] As a further improvement of the present invention, the adjacent rows of the signal pair units are staggered and arranged in an array. As a further improvement of the present invention, a boss is provided on the grounding shield cavity of the signal pair unit, and an anti-backlash groove is provided in the array hole. The boss and the anti-backlash groove cooperate to confine the signal pair unit within the housing.

[0020] In addition, the present invention also solves the above problems through the following technical solutions:

[0021] A high-speed cable connector includes a low crosstalk signal pair unit assembly as described above, and the high-speed cable connector further includes:

[0022] A housing has a B-type insertion terminal and a B-type retaining terminal. The B-type retaining terminal has a limiting groove, and the signal pair unit assembly is disposed in the limiting groove on the B-type retaining terminal.

[0023] As a further improvement of the present invention, the B holding end of the signal pair unit assembly is also provided with a locking hole, and the fixing structure on the insulating body of the signal pair unit assembly limits the signal pair unit assembly through the locking hole.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] Compared to existing signal pair units, this invention eliminates the main body portion of the terminal pair in existing signal pair units, as it discovers that the main body portion of the terminal pair lacks substantial function. The spacing terminals of this invention only include a front contact portion and a rear holding portion, shortening the length of the differential pair terminals and thus reducing the electromagnetic field generated by the differential pair terminals. This reduces leakage from the U-shaped slot opening and decreases crosstalk between two pairs of slender spacing terminals in adjacent signal pair units. Simultaneously, the notch on the side wall of the U-shaped grounding shield cavity is eliminated, further reducing the electromagnetic field generated around the spacing terminal pairs during signal transmission and further reducing crosstalk between spacing terminals in adjacent signal pair units. Attached Figure Description

[0026] Figure 1 The accompanying drawings are shown in Chinese patent CN107257038B;

[0027] Figure 2 The accompanying drawings are shown in Chinese patent CN107257038B;

[0028] Figure 3 The accompanying drawings are shown in Chinese patent CN107257038B;

[0029] Figure 4 The accompanying drawings are shown in Chinese patent CN107257038B;

[0030] Figure 5 A perspective view of an independent signal pair unit constructed according to the principles of this application is shown;

[0031] Figure 6 A top view of a pair of spaced terminals is shown;

[0032] Figure 7 A 3D view of a shielded differential pair cable is shown;

[0033] Figure 8 A perspective view showing a pair of spaced terminals supported by an insulating support frame is shown.

[0034] Figure 9 Show Figure 8 A view showing another perspective of the 3D image;

[0035] Figure 10 A perspective view is shown of an insulating support frame holding a pair of spacer terminals and guiding the positioning of a shielded differential pair cable.

[0036] Figure 11 A three-dimensional view of a grounding shield cavity with three open sides is shown;

[0037] Figure 12 A three-dimensional view of a series of signal pair units is shown;

[0038] Figure 13 A three-dimensional view of the signal pair unit component is shown;

[0039] Figure 14 A perspective view of shell A is shown;

[0040] Figure 15 Show Figure 14 The A shell shown is equipped with several Figure 5 The diagram shown is a 3D representation of the signal pair in the unit.

[0041] Figure 16 A perspective view of shell B is shown;

[0042] Figure 17 Show Figure 16 The B-shell shown is equipped with several Figure 13 The image shown is a three-dimensional representation of the signal to the unit group.

[0043] Figure label:

[0044] Reference numerals in Chinese Patent CN107257038B: 20. Backplate connector; 22. Base; 24. Base base; 25a, 25b. Base sidewalls; 32a, 32b. Signal terminals; 30. Existing signal pair unit; 34. Insulating support frame; 37a, 37b. Insulating support frame sidewalls; 38. Contact portion; 39. Body portion; 40. Tail portion; 46. First stop portion; 47. Second stop portion; 56. Grounding shield; 57. Shield base; 58a, 58b. Sidewalls; 65. First slot; 66. Second slot.

[0045] Reference numerals in this application: 100. Signal pair unit; 200. Signal pair unit assembly; 300. A. High-speed cable connector; 400. B. High-speed cable connector; 01. Spacer terminal; 01_1. Contact portion; 01_2. Holding portion; 02. Insulating support frame; 02_1. Lower cutout; 02_2. Upper cutout; 02_3. Guide positioning hole; 02_4. Slot; 03. Shielded differential pair cable; 03_1. Signal conductor; 03_2. Insulating layer; 03_3. Shielding layer; 03_4. Grounding wire; 04. Grounding shield cavity; 04_1. Bottom; 04_2. Cavity wall; 04_3. Protrusion; 04_4. Boss; 04_5. Hook; 04_6. Open end; 04_7. Connecting arm; 04_8. Cable clip; 05. Insulating body; 05_1. Locking hook; 06. A housing; 06_1. A holding end; 06_11. Array hole; 06_111. Anti-reverse groove; 06_2. A plug-in end; 07. B housing; 07_1-B holding end; 07_11. Limiting groove; 07_12. Locking hole; 07_2. B plug-in end. Detailed implementation method.

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Figure 1 The prior art signal pair unit 30 is shown, including a pair of elongated conductive signal terminals 32a, 32b extending longitudinally along the prior art signal pair unit 30. Figure 2 The diagram shows signal terminals 32a and 32b with opposing contact portions 38 and tail portions 40, connected to each other by an intermediate body portion 39. It also includes a grounding shield 56, comprising a generally flat shield base 57 and defining sidewalls 58a and 58b as a pair of upward-curving flanges extending along almost the entire length of the grounding shield 56. The generally U-shaped grounding shield 56 provides a ground plane to each signal terminal 32a and 32b, extending along three of the four sides of the signal terminals 32a and 32b. This structure facilitates coupling of the signal terminals 32a and 32b in three different directions. We can see that the electromagnetic field generated by the pair of elongated signal terminals 32a and 32b during signal transmission can leak to the outside of the grounding shield 56 through the open side of the U-shape.

[0048] Figure 3 and Figure 4A prior art backplane connector 20 is shown, which employs an insulated connector base 22. The base 22 has a flat base portion 24 and one or more base sidewalls 25a, 25b extending from the base portion 24 to define a slot between the base sidewalls 25a, 25b. A plurality of prior art signal pair units 30 are inserted into the connector base 22 in an array. The conductive elements of the prior art signal pair units 30 protrude from the opening of the connector base to align with an opposing mating connector (not shown). We can see that between adjacent prior art signal pair units 30, the electromagnetic field generated by a pair of elongated conductive signal terminals 32a, 32b of one signal pair unit during signal transmission leaks to the outside of the grounding shield 56 through the U-shaped open side, and then interferes with the pair of elongated conductive signal terminals 32a, 32b inside the adjacent grounding shield 56 through the U-shaped open side of the adjacent signal pair unit.

[0049] in addition, Figure 1 A prior art signal pair unit 30 is shown. One means of securing an insulating support frame 34 to a grounding shield 56 may include a pair of first stops 46 and second stops 47 projecting outward from the sidewalls 37a and 37b of the insulating support frame, respectively. These stops are preferably received within corresponding pairs of first slots 65 and second slots 66, such that the opposing edges of the stops and the first slots 65 and second slots 66 are in contact with each other. These first slots 65 and second slots 66 penetrate the sidewalls, further increasing electromagnetic field leakage and thus increasing crosstalk between two adjacent signal units.

[0050] In summary, high-speed cable connectors using existing signal pair units 30 exhibit crosstalk between adjacent channels within the connector. Specifically, the use of an insulating support frame to fix a pair of slender signal terminals within a U-shaped groove allows the electromagnetic field generated by these terminals to leak from the open surface of the U-shaped groove, resulting in crosstalk between the two pairs of slender signal terminals in two adjacent signal pair units. Furthermore, the notches on the sidewalls of the U-shaped shield of the existing signal pair units further exacerbate the crosstalk between the two pairs of slender terminals in two adjacent signal pair units. With increasingly higher data transmission rates and shorter signal rise times on communication backplanes, this crosstalk between signal pair units will make it difficult to meet the requirements of communication equipment for connector cable assemblies.

[0051] Example 1;

[0052] like Figure 5As shown, the present invention provides a low crosstalk signal pair unit 100, comprising: a pair of spaced terminals 01, an insulating support frame 02, a shielded differential pair cable 03, and a grounded shield cavity 04.

[0053] A pair of spacer terminals, each spacer terminal including a contact portion disposed at the front end and a retaining portion disposed at the rear end, the contact portion and the retaining portion being directly connected, without the body portion of the existing signal pair unit, so as to shorten the length of the spacer terminal and reduce the portion of the spacer terminal exposed to air;

[0054] An insulating support frame is formed on a pair of spaced terminals and positions a shielded differential pair cable.

[0055] A grounding shield cavity with three open sides has a bottom and a pair of opposing cavity walls connected to the bottom. An insulating support frame, a pair of spaced terminals held by the insulating support frame, and a portion of a shielded differential pair cable positioned by the insulating support frame and connected to the pair of spaced terminals are all disposed in the grounding shield cavity.

[0056] The signal pair unit reduces electromagnetic field leakage from the open surface of the U-shaped grounding shield cavity by reducing the body portion of the existing signal pair unit and lengthening the shielded differential pair cable.

[0057] Furthermore, a fixing structure is provided on the grounding shield cavity to hold the insulating support frame within the grounding shield cavity. An electrical connection structure is also provided on the grounding shield cavity to electrically connect with the shielded differential pair cable. The electrical connection structure may include a first electrical connection structure and a second electrical connection structure. The first electrical connection structure is located at one end of the insulating support frame that positions the shielded differential pair cable, and the second electrical connection structure is located at the open rear end of the grounding shield cavity. No through holes or through slots are provided on the pair of opposing cavity walls of the grounding shield cavity. A positioning structure is provided on the insulating support frame to position the shielded differential pair cable.

[0058] Specifically, such as Figure 6 As shown, in this embodiment, the pair of spacer terminals 01 used by the signal pair unit includes a contact portion 01_1 that mates with another connector (not shown), and a holding portion 01_2 that is fixed to the insulating support frame 02 and connected to the shielded differential pair cable 03. The contact portion and the holding portion are directly connected. Figure 2 The diagram shows a pair of elongated conductive signal terminals 32a and 32b used in the prior art. The signal terminals 32a and 32b have corresponding opposing contact portions 38 and tail portions 40, which are connected to each other by an intermediate body portion 39. (Comparison) Figure 2 and Figure 6In the illustrated embodiment, the pair of spacer terminals does not have a body portion 39, thereby effectively shortening the length of the pair of spacer terminals 01.

[0059] like Figure 7 As shown, a shielded differential pair cable 03 includes a pair of spaced signal conductors 03_1, an insulating layer 03_2 respectively wrapping the two signal conductors, a conductive shielding layer 03_3, and a grounding wire 03_4 electrically connected to the shielding layer. The length of the spaced signal conductors is slightly longer than the length of the insulating layer; the longer portion is used to connect to the holding portion of a pair of spaced terminals, which can be done by soldering or other connection methods. Furthermore, the grounding wire is exposed to air at the same end as the signal conductors, while this end of the grounding wire is folded in another direction, not in the same direction as the signal conductors, and does not contact the two signal conductors.

[0060] like Figure 8 and Figure 9 As shown, an insulating support frame 02 is formed on the retaining portion 01_2 of a pair of spacer terminals 01. The contact portion 01_1, which is connected to the retaining portion 01_2 and is located at the front end, is cantilevered in the insulating support frame. A lower cutout 02_1 is provided below the retaining portion 01_2 located in the insulating support frame 02, so that part of the lower surface of the retaining portion 01_2 of the pair of spacer terminals is exposed to the air. Preferably, the lower cutout 02_1 is square. The shielded differential pair cable 03 is inserted into the guide positioning hole 0 on the insulating support frame 02. 2_3, until the insulating layer 03_2 and the pair of spacer terminals contact the retaining part 01_2, the guide positioning hole 02_3 serves as a positioning structure to fix the shielded differential pair cable 03 within the insulating support frame; and the retaining part 01_2 of the pair of spacer terminals is electrically connected to the signal conductor 03_1 of the shielded differential pair cable 03 exposed to air; the upper cutout 02_2 of the insulating support frame 02 is used for process clearance when the retaining part 01_2 of the pair of spacer terminals is electrically connected to the signal conductor 03_1 of the shielded differential pair cable 03. Because the relative permittivity of air is 1, which is smaller than the relative permittivity of the insulating support frame, these cutouts increase the impedance value of the cutout parts, achieving impedance matching with other parts of the spacer terminals.

[0061] like Figure 10 As shown, the insulating support frame 02 is formed on the holding portion 01_2 of a pair of spacer terminals 01, the shielded differential pair cable 03 is assembled on the insulating support frame 02, and the holding portion 01_2 of the pair of spacer terminals 01 is electrically connected to a pair of signal conductors 03_1 of the shielded differential pair cable 03.

[0062] like Figure 11As shown, a grounding shield cavity 04 has a bottom 04_1 and a pair of opposing cavity walls 04_2 connected to the bottom. The cavity walls 04_2 are provided with several protrusions 04_3, hooks 04_5, connecting arms 04_7, cable clips 04_8, and open ends 04_6. The cavity walls 04_2 do not have through holes or through slots. In this embodiment, the fixing structure consists of hooks oppositely disposed on the two cavity walls. The hooks cooperate with slots on the insulating support frame to secure the insulating support frame within the grounding shield cavity. Of course, other structures capable of securing the insulating support frame within the grounding shield cavity can also be used. Since the shielded differential pair cable is fixed in the guide positioning hole 02_3 within the insulating support frame, in this embodiment, the first electrical connection structure can be achieved through the opening on the hooks set on the two cavity walls. Of course, it can also be set separately to fix the grounding shield cavity to one end of the shielded differential pair cable. Here, the grounding wire of the shielded differential pair cable can correspond. The second electrical connection structure is a cable clip set on the grounding shield cavity, which is electrically connected and fixed to the other end of the shielded differential pair cable.

[0063] Figure 5 It shows Figure 10 The assembly shown is assembled in Figure 11 The diagram shows the state inside the grounding shield cavity 04. The bottom 04_1 of the grounding shield cavity 04 is in close contact with the lower surface of the insulating support frame 02. Hooks 04_5 on the cavity wall 04_2 engage with slots 02_04 on the insulating support frame 02, fixing the insulating support frame 02 within the grounding shield cavity 04. Simultaneously, the shielded differential pair cable 03 closes the open end 04_6 of the grounding shield cavity 04. The grounding conductor 03_4, which is electrically connected to the shielding layer of the shielded differential pair cable 03, is electrically connected to the hooks 04_5 on the grounding shield cavity 04, fulfilling the function of the first electrical connection structure. The cable clips 04_8 of the grounding shield cavity 04 are electrically connected to the shielding layer 03_3 of the shielded differential pair cable 03, fulfilling the function of the second electrical connection structure.

[0064] contrast Figure 1 Existing technologies Figure 5 In a low crosstalk signal pair unit embodiment of the present invention, since no terminal body portion 39 which has no substantial meaning is provided in the embodiment of the present invention, the length of a pair of spaced terminals 01 in the signal pair unit is effectively shortened. During signal transmission, the electromagnetic field generated by the shortened terminals to the surroundings will be reduced, and naturally, the electromagnetic field leaking from the open surface of the U-shaped groove will also be reduced.

[0065] Example 2;

[0066] A low-crosstalk signal pair unit assembly includes a set of signal pair units and an insulating body encapsulated on the set of signal pair units; each signal pair unit includes:

[0067] A pair of spacer terminals, each spacer terminal including a contact portion disposed at a front end and a retaining portion disposed at a rear end, the contact portion and the retaining portion being directly connected;

[0068] An insulating support frame is formed on the retaining portion of the pair of spacer terminals and positions a shielded differential pair cable.

[0069] A grounding shield cavity with three open sides, the grounding shield cavity having a bottom and a pair of opposing cavity walls connected to the bottom, the insulating support frame, the pair of spacer terminals held by the insulating support frame, and a portion of the shielded differential pair cable positioned by the insulating support frame and connected to the pair of spacer terminals are disposed in the grounding shield cavity.

[0070] Furthermore, each group of signal pair units in the signal pair unit assembly is arranged in a row, and each grounded shield cavity of the signal pair unit is connected. The insulating body is encapsulated on one end of the shielded differential pair cable that is fixed. A fixing structure is provided on the insulating body, and the fixing structure is connected to the housing through the fixing structure.

[0071] Specifically, such as Figure 12 As shown, Figure 5 The signal pair units 100 shown are arranged in a row, and the connecting arms 04_7 on the grounding shield cavity 04 of adjacent signal pair units are electrically connected to each other.

[0072] like Figure 13 As shown, the signal pair unit component 200 is composed of... Figure 12 The assembly structure shown is formed by remolding an insulating body 05; a locking hook 05_1 is provided on the insulating body 05, which serves as a fixing structure.

[0073] Example 3;

[0074] A high-speed cable connector includes a plurality of low crosstalk signal pair units as described in Embodiment 1, and the high-speed cable connector further includes:

[0075] A housing with an A-pair plug and an A-holding end. The A-holding end has a plurality of array holes through which signal pair units are arranged in rows.

[0076] Furthermore, the signal pair units are staggered between adjacent rows and arranged in an array. The grounding shield cavity on the signal pair unit is provided with a boss, and the array hole is provided with a backlash groove. The boss and the backlash groove cooperate to confine the signal pair unit within the housing.

[0077] Specifically, such as Figure 14 As shown, a housing A 06 is provided with an A-type insertion end 06_2 and an A-type retaining end 06_1. The A-type retaining end is provided with an array hole 06_11, and an anti-retraction groove 06_111 is provided in the array hole 06_11. Figure 15 As shown, a high-speed cable connector 300 is made of... Figure 14 The A housing 06 shown is assembled with a set of signal pair units 100. The signal pair units 100 are located in the array hole 06_11 of the A housing 06. The anti-reverse groove 06_111 in the array hole 06_11 prevents the signal pair units 100 from detaching from the A housing 06 by blocking the boss 04_4 on the grounding shield cavity 04.

[0078] Example 4;

[0079] A high-speed cable connector includes a low crosstalk signal pair unit assembly as described in Embodiment 2, and the high-speed cable connector further includes:

[0080] A housing has a B-type plug-in terminal and a B-type retaining terminal. The B-type retaining terminal has a limiting groove and a locking hole. A low-crosstalk signal pair unit assembly is located in the limiting groove on the B-type retaining terminal. The fixing structure on the insulating body of the signal pair unit assembly limits the signal pair unit assembly through the locking hole.

[0081] like Figure 16 As shown, a B housing 07 is provided with a B insertion end 07_2 and a B holding end 07_1. The B holding end is provided with a limiting groove 07_11 and a locking hole 07_12.

[0082] like Figure 17 As shown, a B-type high-speed cable connector 400 is made of... Figure 16 The B housing 07 shown is assembled with a set of signal pair unit components 200; the signal pair unit components 200 are located in the limiting groove 07_11 on the B housing 07, and the locking hook 05_1 on the unit components 200 is engaged in the locking hole 07_12 on the B housing 07.

[0083] Figure 15 The A high-speed cable connector 300 shown is neutral. Figure 17In the high-speed cable connector 400 shown, signal pair units 100 are arranged in a row, with the signal pair units adjacent to each other. Since the embodiment of the present invention does not have a terminal body 39 which has no substantial meaning, the length of a pair of spacer terminals 01 in the signal pair unit is effectively shortened. During signal transmission, the electromagnetic field generated by the shortened pair of spacer terminals will be reduced. Naturally, the electromagnetic field leaking from the open surface of the U-shaped groove to a pair of spacer terminals in the adjacent signal pair unit will also be reduced. This effectively reduces crosstalk between differential channels in the high-speed cable connector.

[0084] Compared to existing signal pair units, this invention has found that the main body of the terminal pair in existing signal pair units does not have a substantial function, and has eliminated the main body of the terminal pair in the signal pair unit. The terminal pair only includes a front contact part and a rear holding part, shortening the length of the differential pair terminals, thereby reducing the electromagnetic field generated by the differential pair terminals and the leakage from the U-shaped slot opening. This reduces the crosstalk between the two pairs of slender terminals in adjacent signal pair units. At the same time, the notch on the side wall of the U-shaped shield is eliminated, further reducing the crosstalk between the two pairs of slender terminals in adjacent signal pair units.

[0085] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can devise many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A low-crosstalk signal pair unit, characterized in that, include: A pair of spacer terminals, each spacer terminal including a contact portion disposed at a front end and a retaining portion disposed at a rear end, the contact portion and the retaining portion being directly connected; An insulating support frame is formed on the retaining portion of the pair of spacer terminals and positions a shielded differential pair cable. A grounding shield cavity with three open sides, the grounding shield cavity having a bottom and a pair of opposing cavity walls connected to the bottom, an insulating support frame, a pair of spacer terminals held by the insulating support frame, and a portion of the shielded differential pair cable positioned by the insulating support frame and connected to the pair of spacer terminals are disposed in the grounding shield cavity; no opposing through holes or slots are provided on the opposing cavity walls of the grounding shield cavity. The insulating support frame is provided with a positioning structure for positioning the shielded differential pair cable; the insulating support frame is formed on the holding part of a pair of spaced terminals, and the contact part connected to the holding part is cantilevered outside the insulating support frame. The shielded differential pair cable is inserted into the guide positioning hole on the insulating support frame until the insulation layer of the shielded differential pair cable and the holding part of a pair of spacer terminals come into contact. The guide positioning hole serves as a positioning structure to fix the shielded differential pair cable in the insulating support frame; and the holding part of the pair of spacer terminals is electrically connected to the signal conductor of the shielded differential pair cable exposed to air. A lower cutout is provided below the retaining portion located within the insulating support frame, exposing part of the lower surface of the retaining portion of a pair of spacer terminals to the air.

2. The low crosstalk signal pair unit as described in claim 1, characterized in that, The grounding shield cavity is provided with a fixing structure, which holds the insulating support frame in place within the grounding shield cavity; the grounding shield cavity is provided with an electrical connection structure, which is electrically connected to the shielded differential pair cable shield.

3. The low crosstalk signal pair unit as described in claim 2, characterized in that, The electrical connection structure includes a first electrical connection structure and a second electrical connection structure. The first electrical connection structure is located at one end of the shielded differential pair cable positioned by the insulating support frame, and the second electrical connection structure is located at the open end of the grounding shield cavity away from the spacer terminal.

4. The low crosstalk signal pair unit as described in claim 3, characterized in that, The bottom of the grounding shield cavity and the lower surface of the insulating support frame are in close contact. The hooks on the cavity wall are engaged in the slots on the insulating support frame to fix the insulating support frame in the grounding shield cavity. At the same time, the shielded differential pair cable closes the open end of the grounding shield cavity. The grounding wire that is electrically connected to the shielding layer of the shielded differential pair cable is electrically connected to the hooks on the grounding shield cavity, realizing the function of the first electrical connection structure. The cable clips of the grounding shield cavity are electrically connected to the shielding layer of the shielded differential pair cable, realizing the function of the second electrical connection structure.

5. The low crosstalk signal pair unit as described in claim 1, characterized in that, The insulating support frame has an upper hollow section to allow space for the spacer terminal holding part to make electrical connection with the signal conductor of the shielded differential pair cable.

6. A low-crosstalk signal pair unit component, characterized in that, It includes a set of signal pair units and an insulating body encapsulated on the set of signal pair units; each signal pair unit employs a low crosstalk signal pair unit as described in claim 1.

7. The low crosstalk signal pair unit component as described in claim 6, characterized in that... Each group of signal pair units in the signal pair unit assembly is arranged in a row, each grounded shielded cavity of the signal pair unit is electrically connected, and the insulating body is encapsulated in one end of the shielded differential pair cable that is fixed. And / or the insulating body is provided with a fixing structure, which is connected to the shell through the fixing structure.

8. A high-speed cable connector, comprising a plurality of low crosstalk signal pair units as described in claim 1, characterized in that, High-speed cable connectors also include: A housing has an A-pair plug and an A-holding end. The A-holding end has a plurality of array holes through which signal pair units are arranged in rows. The signal pair units are staggered between adjacent rows and arranged in an array.

9. A high-speed cable connector as described in claim 8, characterized in that, The grounding shield cavity on the signal pair unit is provided with a boss, and the array hole is provided with a backstop groove. The boss and the backstop groove cooperate to confine the signal pair unit within the housing.

10. A high-speed cable connector comprising a plurality of signal pair unit assemblies with low crosstalk as described in claim 6, characterized in that; The high-speed cable connector also includes: A housing has a B-type insertion terminal and a B-type retaining terminal. The B-type retaining terminal has a limiting groove, and the signal pair unit assembly is disposed in the limiting groove on the B-type retaining terminal.

11. A high-speed cable connector as described in claim 10, characterized in that, The B holding end of the signal pair unit assembly is also provided with a locking hole, and the fixing structure on the insulating body of the signal pair unit assembly limits the signal pair unit assembly through the locking hole.

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