CN109586107B - A connector and its signal transmission structure - Google Patents

Abstract

The present invention provides a connector and a signal transmission structure thereof. The connector includes a connector housing, and at least one signal pair unit is installed in the connector housing. The signal pair unit includes a signal pair composed of two signal contacts arranged at intervals, and a signal pair composed of two signal contacts. The periphery of the pair has a set polygonal area, and the signal pair unit further includes grounding contacts disposed at each corner position of the polygonal area to enclose the signal pair inside. The signal pair included in the signal pair unit of the connector of the present invention is surrounded by the ground contact piece enclosing a polygonal area, so that the ground contact piece can well shield the signal pair and avoid two adjacent signal pairs The signal crosstalk between the connectors greatly reduces the signal crosstalk of the connector and ensures the signal transmission quality.

Description

A connector and its signal transmission structure

technical field

The present invention relates to a connector and its signal transmission structure.

Background technique

Crosstalk refers to undesired voltage noise interference on adjacent transmission lines due to electromagnetic coupling when a signal propagates on a transmission line. Signals are transmitted in transmission lines in the form of electromagnetic waves, which include time-varying electric and magnetic fields that induce voltages and currents in surrounding transmission lines. Voltage and current are the direct causes of crosstalk performance in disturbed transmission lines.

Crosstalk is another important factor affecting the transmission performance of products. Reducing crosstalk has always been an important direction in the design of high-speed connectors. In some cases, its importance to high-speed performance transmission even exceeds the characteristic impedance. Especially in the case where the characteristic impedance is easy to guarantee, the transmission performance design of high-speed connectors is largely the design of the connector's anti-crosstalk capability.

Excessive crosstalk will have two harmful effects: first, crosstalk will change the effective characteristic impedance and transmission speed of the transmission line, affecting the system signal integrity, thereby changing the transmission performance of the transmission line; The introduction of induced noise on the transmission line further degrades the signal integrity and reduces the noise margin.

There are three traditional ways to control or eliminate crosstalk.

One is to increase the distance between signal paths. When a signal is transmitted, alternating magnetic and electric fields are generated between the signal path and the return path. These fields are not confined to the narrow area between the signal path and the return path, but extend over the entire space. These extended fields are often referred to as fringing fields. If you increase the distance between the signal paths and keep the wires away from the fringing fields, you can fundamentally remove the noise caused by crosstalk. Therefore, in theory, this method is the most effective way to control crosstalk. But in fact, with the continuous improvement of modern data transmission speed and system throughput, the density of signal transmission circuits actually required to be arranged per unit area is often larger, and the required signal path density and limited area conflict. In many cases It is unavoidable that the lower signal lines are close to each other and generate crosstalk.

The second is the use of a unique shielding structure. For example, the invention patent with the patent number of US200623561 discloses a high-speed connector. The differential signal pairs of the high-speed connector are arranged in a matrix, and a ground signal is arranged between two adjacent differential pairs arranged vertically. The signal pairs of two adjacent columns are staggered in the vertical direction, that is, in the column direction. Although there is a ground signal separation between two adjacent signal pairs in the same column of this high-speed connector to achieve shielding between the two adjacent signal pairs, the two adjacent signal pairs in the adjacent two columns are relatively close. There is also signal crosstalk between pairs, and in the case of high signal density, it will also affect the signal transmission of high-speed connectors.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a connector with low signal crosstalk, and at the same time, the present invention also provides a signal transmission structure suitable for the connector.

In order to achieve the above object, the technical solution 1 of the connector of the present invention is: a connector, comprising a connector housing, and at least one signal pair unit is installed in the connector housing, and the signal pair unit includes two spaced apart. A signal pair composed of signal contacts, the periphery of the signal pair composed of two signal contacts has a set polygonal area, and the signal pair unit also includes a signal pair arranged at each corner position of the polygonal area to enclose the signal pair inside ground contact.

The signal pair included in the signal pair unit of the connector of the present invention is surrounded by the ground contact piece enclosing a polygonal area, so that the ground contact piece can well shield the signal pair and avoid two adjacent signal pairs The signal crosstalk between the connectors greatly reduces the signal crosstalk of the connector and ensures the signal transmission quality.

On the basis of the technical solution 1, the technical solution 2 is further defined, that is, the polygonal area enclosed by the ground contact is a triangular area.

On the basis of the technical solution 1, the technical solution 3 can be further limited, that is, the area enclosed by the ground contact is a quadrangular area.

On the basis of technical solution 3, technical solution 4 is further defined, that is, the signal pair is located at the center of the quadrilateral area surrounded by the ground contact. In this way, the shielding effect of the ground contacts of the signal pair unit is relatively balanced. When multiple signal pair units are arranged in the connector, the fringe fields of each signal pair in the connector can be well shielded.

On the basis of technical solution 4, technical solution 5 can be obtained by further limitation, that is, the set quadrilateral area is a parallelogram area. The ground contact piece encloses a parallelogram area, which improves the consistency of the arrangement form of the ground contact piece and the signal pair, and facilitates the arrangement of multiple signal pair units in the connector.

On the basis of the technical solution 5, the technical solution 6 can be further limited, that is, the set quadrilateral is a rectangle, so that the structure can be more compact when arranging multiple signal pair units.

On the basis of technical solution 6, it can be further optimized to obtain technical solution 7, that is, the length direction of the rectangular area is consistent with the parallel direction of the two signal contacts of the signal pair, so that the ground contact can be arranged with the two signal contacts of the signal pair. The fringing fields generated by the signal contacts are matched to improve the shielding effect.

Of course, on the basis of technical solution 4, technical solution 8 can be obtained by further limitation, that is, the set quadrilateral area is an isosceles trapezoid. The isosceles trapezoid, as a relatively regular quadrilateral, can also be applied to the case where there are multiple signal pair units.

Furthermore, on the basis of technical solution 8, technical solution 9 can be obtained by further optimization, that is, the two parallel sides of the isosceles trapezoid enclosed by the ground contact are parallel to the connection lines of the two signal contacts of the differential pair.

On the basis of the above-mentioned various technical solutions, the technical solution 10 can be further limited, that is, there are multiple signal pair units installed in the connector housing, and they are arranged in a matrix, the matrix arrangement has a regular structure, and is convenient for a quadrilateral The integrated arrangement of the signal pair unit improves the signal transmission density on the premise of ensuring low crosstalk.

The technical solution 1 of the signal transmission structure of the present invention is: a signal transmission structure, comprising at least one signal pair unit, and the signal pair unit includes a signal pair composed of two signal contacts arranged at intervals, and the two signal contacts The outer periphery of the formed signal pair has a set polygonal area, and the signal pair unit further includes grounding contacts arranged at each corner position of the polygonal area to enclose the signal pair inside.

The signal pair included in the signal pair unit of the connector of the present invention is surrounded by the ground contact piece enclosing a polygonal area, so that the ground contact piece can well shield the signal pair and avoid two adjacent signal pairs The signal crosstalk between the connectors greatly reduces the signal crosstalk of the connector and ensures the signal transmission quality.

On the basis of the technical solution 1, the technical solution 2 is further defined, that is, the polygonal area enclosed by the ground contact is a triangular area.

On the basis of the technical solution 1, the technical solution 3 can be further limited, that is, the area enclosed by the ground contact is a quadrangular area.

On the basis of technical solution 3, technical solution 4 is further defined, that is, the signal pair is located at the center of the quadrilateral area surrounded by the ground contact. In this way, the shielding effect of the ground contacts of the signal pair unit is relatively balanced. When multiple signal pair units are arranged in the connector, the fringe fields of each signal pair in the connector can be well shielded.

On the basis of technical solution 4, technical solution 5 can be obtained by further limitation, that is, the set quadrilateral area is a parallelogram area. The ground contact piece encloses a parallelogram area, which improves the consistency of the arrangement form of the ground contact piece and the signal pair, and facilitates the arrangement of multiple signal pair units in the connector.

On the basis of the technical solution 5, the technical solution 6 can be further limited, that is, the set quadrilateral is a rectangle, so that the structure can be more compact when arranging multiple signal pair units.

On the basis of technical solution 6, it can be further optimized to obtain technical solution 7, that is, the length direction of the rectangular area is consistent with the parallel direction of the two signal contacts of the signal pair, so that the ground contact can be arranged with the two signal contacts of the signal pair. The fringing fields generated by the signal contacts are matched to improve the shielding effect.

Of course, on the basis of technical solution 4, technical solution 8 can be obtained by further limitation, that is, the set quadrilateral area is an isosceles trapezoid. The isosceles trapezoid, as a relatively regular quadrilateral, can also be applied to the case where there are multiple signal pair units.

Furthermore, on the basis of technical solution 8, technical solution 9 can be obtained by further optimization, that is, the two parallel sides of the isosceles trapezoid enclosed by the ground contact are parallel to the connection lines of the two signal contacts of the differential pair.

On the basis of the above-mentioned various technical solutions, the technical solution 10 can be further limited, that is, there are multiple signal pair units installed in the connector housing, and they are arranged in a matrix, the matrix arrangement has a regular structure, and is convenient for a quadrilateral The integrated arrangement of the signal pair unit improves the signal transmission density on the premise of ensuring low crosstalk.

Description of drawings

1 is a schematic diagram of a signal pair unit in Embodiment 1 of the connector of the present invention;

2 is a schematic diagram of a signal transmission structure in Embodiment 1 of the connector of the present invention;

3 is a schematic diagram of a signal pair unit in Embodiment 2 of the connector of the present invention;

4 is a schematic diagram of a signal transmission structure in Embodiment 2 of the connector of the present invention;

5 is a schematic diagram of a signal pair unit in Embodiment 3 of the connector of the present invention;

6 is a schematic diagram of a signal transmission structure in Embodiment 4 of the connector of the present invention;

FIG. 7 is a schematic diagram of a signal transmission structure in Embodiment 5 of the connector of the present invention.

Detailed ways

The embodiments of the present invention will be further described below with reference to the accompanying drawings.

The specific embodiment 1 of the connector of the present invention specifically refers to a differential connector. Of course, in other embodiments, it is not limited to a differential connector. The connector of the present invention includes a connector housing, an insulator is arranged in the connector housing, and a signal pair unit 3 is installed in the insulator, as shown in FIG. 1 ; a plurality of signal pair units 3 are arranged according to a certain rule to form a signal transmission structure ,as shown in picture 2.

The signal pair unit 3 includes a signal pair composed of two signal contacts 1 arranged at intervals, and the outer periphery of the signal pair has a set quadrilateral area. It should be noted that the quadrilateral area is a virtual space area for the convenience of description. definition made. The signal pair unit 3 further includes four ground contact pieces 2, the four ground contact pieces correspond to the four corner positions of the quadrilateral area, and the quadrilateral area enclosed by the four ground contact pieces encloses the signal pair inside. It should be noted that the meaning of enclosing inside is more inclined that the signal contact cannot be located on the connection line of two adjacent ground contacts, or at least one signal contact cannot be located on the connection line of two adjacent ground contacts. . More preferably, the signal pair is arranged at the center of the quadrilateral area, so that the shielding effect of the four grounding contacts can be maximized when the area of the quadrilateral area is constant, and the shielding effect of the four grounding contacts can be compared. balanced.

The quadrilaterals enclosed by the four grounding contact pieces can be various, such as any irregular quadrilateral, parallelogram, or several special cases of parallelograms: rhombus, rectangle, isosceles trapezoid, and so on. Since a plurality of signal pair units are generally installed in the connector, in order to facilitate the arrangement of the plurality of signal pair units and improve the signal transmission density, the quadrilateral enclosed by the four grounding contacts is preferably a regular-shaped quadrilateral. For a pair of signal pairs, the signal from the direction of the center line of the signal pair causes more interference to the signal transmission than the signal perpendicular to the direction of the center line of the signal pair. Therefore, in this embodiment, the four ground contacts surround The resulting quadrilateral is a rectangle with unequal length and width, and the length direction of the rectangle is consistent with the parallel direction of the two signal contacts of the signal pair.

Of course, in the second embodiment, as shown in FIG. 3 , the quadrilateral enclosed by the four grounding contacts is an isosceles trapezoid. Then, when the signal pair units are densely arranged in the connector, a matrix arrangement can be adopted. The structure is shown in Figure 4. The adjacent two signal pair units in the same vertical column can be arranged in opposite directions horizontally, that is, the isosceles trapezoidal slopes enclosed by the ground contacts of the two signal pair units are parallel to each other. The pair units are arranged side by side, and the long sides and the short sides of the isosceles trapezoid formed by the two signal pair units are close to each other; or in other embodiments, the isosceles trapezoid formed by the signal pair units of adjacent vertical columns The long side is close to the long side, and the short side is close to the short side.

Or in the third embodiment, as shown in FIG. 5 , the quadrilateral enclosed by the four grounding contacts is a parallelogram, so when the signal pair units are densely arranged in the connector, a matrix arrangement can be adopted, and the same The adjacent sides of the quadrilateral enclosed by the ground contacts of the adjacent two signal pair units in the vertical column are parallel, and the adjacent sides of the quadrilateral enclosed by the ground contacts of the two adjacent signal pair units in the same horizontal row are also parallel.

The present invention also provides a specific embodiment 4 of the connector. As shown in FIG. 6 , the signal pair unit includes three ground contact pieces 2 , the three ground contact pieces 2 enclose a triangular area, and the signal pair formed by the signal contact piece 1 is located in the within the triangle area. A plurality of signal pair units are arranged in an array, and the directions of two adjacent signal pair units are arranged in opposite directions in the longitudinal direction.

The present invention also provides a fifth specific embodiment of the connector. As shown in FIG. 7 , the signal pair unit includes six ground contacts, the six ground contacts 2 enclose a hexagonal area, and the signal pair constituted by the signal contacts 1 located within the hexagonal area. A plurality of signal pair units are arranged in a row laterally, and there are multiple rows in the longitudinal direction, and two adjacent rows are staggered in the longitudinal direction.

Embodiments 1, 4, and 5 above provide embodiments with three, four, and six grounding contacts, respectively. In other embodiments, there may also be five or seven grounding contacts for the signal pair unit. are no longer listed in detail.

In the above several embodiments, there are multiple signal pair units in the connector and they are arranged in a matrix. The signal pairs of the two rows are staggered in the lateral direction.

In the above several embodiments, the signal transmission structure includes a plurality of signal pair units. The present invention also does not exclude the implementation of the signal transmission structure including only one or two signal pair units.

The specific structure of the embodiment of the signal transmission structure of the present invention is the same as the structure of the signal transmission structure included in the above-mentioned connector, and will not be repeated here.

Claims (6)

1. A connector comprising a connector housing, characterized in that, at least one signal pair unit is installed in the connector housing, and the signal pair unit includes a signal pair consisting of two signal contacts arranged at intervals, and the two The periphery of the signal pair composed of the two signal contacts has a set polygonal area, and the signal pair unit further includes a ground contact member disposed at each corner of the polygonal area to enclose the signal pair inside, and the ground contact member surrounds The formed polygonal area is a quadrilateral area, and the signal pair is located at the center of the quadrilateral area enclosed by the ground contacts; the quadrilateral area is a rectangular area, and the length direction of the rectangular area is the parallel direction of the two signal contacts of the signal pair. or the quadrilateral area is an isosceles trapezoid area. 2 . The connector according to claim 1 , wherein the two parallel sides of the isosceles trapezoid region enclosed by the ground contact are parallel to the connecting lines of the two signal contacts of the differential pair. 3 . 3 . The connector according to claim 1 or 2 , wherein there are multiple signal pair units installed in the connector housing, and they are arranged in a matrix. 4 . 4. A signal transmission structure, characterized in that it comprises at least one signal pair unit, and the signal pair unit comprises a signal pair formed by two signal contacts arranged at intervals, and a periphery of the signal pair formed by the two signal contacts. With a set polygonal area, the signal pair unit further includes grounding contacts arranged at each corner of the polygonal area to enclose the signal pair inside, the polygonal area enclosed by the grounding contact is a quadrilateral area, and the signal pair It is located in the center of the quadrilateral area enclosed by the ground contact; the quadrilateral area is a rectangular area, and the length direction of the rectangular area is consistent with the parallel direction of the two signal contacts of the signal pair; or the quadrilateral area is equal to Waist trapezoid area. 5 . The signal transmission structure according to claim 4 , wherein the two parallel sides of the isosceles trapezoid region enclosed by the ground contact are parallel to the connecting lines of the two signal contacts of the differential pair. 6 . 6. The signal transmission structure according to claim 4 or 5, characterized in that there are a plurality of signal pair units and they are arranged in a matrix.

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