KR100712468B1 - An electric connector - Google Patents

Abstract

The present invention relates to an electrical connector composed of a modular jack and a plug, to minimize inductive crosstalk generated between adjacent conductive pairs (T3, R3) (T2, R2). In the present invention, the conductive pairs T2 and R2 are arranged with respect to the conductive pairs T3 and R3 so as to generate inductive crosstalk having mutually opposite phases in the first and second portions. The cross-alignment of the conductive pairs T2 and R2 is realized through a multilayer wiring structure, and at this time, the virtual surfaces formed by the conductive pairs T2 and R2 are 80 with respect to the virtual surfaces formed by the conductive pairs T3 and R3. By setting it as ˜90 °, inductive crosstalk generated in the cross-array structure is minimized.

Description

Electrical connector {AN ELECTRIC CONNECTOR}

1 is a conceptual diagram showing the concept of a low cross-talk connector according to the prior art.

Figure 2 is a block diagram showing the configuration of a modular jack and plug to which the present invention is applied.

3 is a configuration diagram showing in detail the configuration of the plug in FIG.

4 is an enlarged structural view of the arrangement of the terminal pins 23 in FIG.

FIG. 5 is a diagram showing experimental results of detecting magnetic field emission amount with respect to the structure of the terminal pin 23 shown in FIG. 4; FIG.

6 is an explanatory diagram for explaining the cause of inductive crosstalk.

7 is a conceptual diagram illustrating the basic concept of the present invention.

8 and 9 are perspective views showing the configuration of the insert according to an embodiment of the present invention.

FIG. 10 is an exploded perspective view illustrating the internal wiring structure of the insert illustrated in FIG. 8. FIG.

FIG. 11 is a partially cutaway perspective view illustrating the structure of the insert shown in FIG. 8; FIG.

12 is a circuit diagram showing an equivalent circuit corresponding to the structure of the insert shown in FIG.

<Description of the code | symbol about the principal part of drawing>                 

1: modular jack, 2: plug,

11: case, 12: substrate,

13: insert, 13a: connector pin,

13b: body, 14: connection terminal,

21: guide groove, 22: cable,

23: terminal pin, 80: insert.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector composed of a modular jack and a plug, and more particularly to an electrical connector capable of minimizing crosstalk between adjacent wiring lines.

Recently, with the rapid development of information and communication technology, the type and number of communication terminals used in offices or homes are diversified. In addition, with the spread of the Internet, the development of computer communication using a personal computer as a terminal has made rapid progress in data transmission speed.

In the case of a communication terminal used in an office or home, it is coupled to an outdoor transmission cable through a predetermined electrical connector. Such electrical connectors are usually constructed with modular jacks and plugs. In addition, the user may selectively connect the terminal to the outdoor cable by using a plug coupled with the communication terminal to a modular jack coupled with the outdoor cable. Although the above-mentioned electrical connector has been conventionally used with a 4-pin connector in general, an 8-pin connector is expected to be mainstream in the future as the number of terminals used indoors increases.

In transmission cables, two lines are usually paired, that is, one signal pair provides one communication line. However, when such a communication line is disposed adjacent to another communication line, crosstalk occurs between the communication lines, causing an error in transmission data. Such crosstalk is known to occur due to capacitive and inductive coupling between communication lines.

U.S. Patent Nos. 5,488,201 and 5,299,956 disclose a method for preventing crosstalk between the communication lines described above. They are intended to counteract crosstalk through antiphase capacitive coupling. 1 illustrates the gist of the '956' patent.

In the configuration of FIG. 1, the first communication line and the second communication line are composed of a tip and a ring line, respectively. In the first part, the tip line T1 of the first communication line is connected to the ring line R2 of the second communication line, and the ring line R1 of the first communication line is connected to the tip line T2 of the second communication line. On the other hand, in the second part, the second communication line is arranged to cross the first communication line so that the tip line T1 of the first communication line is the tip line T2 of the second communication line and the first communication. The ring line R1 of the line is disposed adjacent to the ring line R2 of the second communication line. In the above configuration, crosstalk is eliminated by eliminating crosstalk by generating crosstalk between the first and second communication lines generated in the first portion and crosstalk in the reverse phase. That is, the capacitive bonds formed in the first portion and the capacitive bonds formed in the second portion have mutual inverse phases, thereby eliminating crosstalk generated by the capacitive bonds.

However, in recent years, as the data communication speed is improved, and thus the transmission / reception frequency is increased, the method using the capacitive coupling described above has reached the limit of effectively eliminating crosstalk. According to the inventors' experiment, the above-described inverse capacitive coupling method is considered to be usable within a data rate range of 100 Mbps. For example, the U.S. Federal Communications Standard mandates that crosstalk in electrical connectors should be greater than -46 kHz. However, when the communication frequency, i.e., the data transmission rate, rises above 100 Mbps, it is very difficult to secure a crosstalk value of -42.5 kHz or more.

Accordingly, an object of the present invention is to provide an electrical connector that is capable of providing a stable crosstalk value even for a high frequency and a communication speed.

An electrical connector according to the present invention for realizing the above object is an electrical connector having a plurality of conductive pairs arranged adjacently, wherein at least one conductive pair is arranged to cross each other with respect to an adjacent conductive pair, And to induce crosstalk.

In addition, the electrical connector according to the present invention comprises a plug and a modular jack, wherein the plug is provided between a first conductive pair having first and second conductors and a first and second conductor of the first conductive pair. An electrical connector having a second conductive pair having a third conductive line arranged to be adjacent to a first conductive line and a fourth conductive line arranged to be adjacent to a second conductive line, wherein the third and fourth conductive lines are crossed. The third conductive line is arranged adjacent to the second conductive line, and the fourth conductive line is arranged adjacent to the first conductive line.

In addition, the modular jack is provided with a connector pin electrically coupled to the plug, and a body for fixing the connector pin, the connector pin is characterized in that a multi-layer wiring structure in the body.

The incidence plane in which the virtual plane interconnecting the second conductive pair is incident into the body with respect to the incidence plane in which the virtual surface interconnecting the first conductive pairs is incident into the body has an angle of 80 to 90 °. Characterized in forming.

In addition, the emission surface from which the virtual surface interconnecting the second conductive pairs exits from the body with respect to the emission surface from which the virtual surface interconnecting the first conductive pairs exits from the body. It is characterized by forming an angle.

In addition, the first conductive line and the third conductive line, the second conductive line and the fourth conductive line is characterized in that the mutual capacitive coupling.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

First, the basic concept of the present invention will be described.

2 is an external perspective view of the electrical connector to which the present invention is applied and showing the RJ45 type modular jack and its plug. Here, the modular jack 1 includes a case 11 and a substrate 12 inserted into the case 11. The insert 13 is mounted on the front end of the board, and a connection terminal 14 for electrically coupling the cable to the board 12 is provided at the rear end. In addition, the insert 13 is electrically connected to the substrate 12 at the rear end of the body 13b through a connector pin 13a bent upwardly, for example, through a body 13b made of resin or the like. In addition, a predetermined electrical line is disposed on the upper surface and the rear surface of the substrate 12 to electrically couple the connector pin 13a to the connection terminal 14.

The plug 2 is provided with a guide groove 21 for guiding the connector pin 13a at a position corresponding to the connector pin 13a of the tip portion thereof, and as shown in FIG. A terminal pin 23 is provided which is electrically coupled to the cable 22 in 21. Therefore, when the plug 2 is inserted into the case 11 of the modular jack 1, the connector pin 13a of the modular jack 1 and the terminal pin 23 of the plug 2 are electrically coupled. .

4 is an enlarged structural diagram of the arrangement of the terminal pins 23 in FIG. 3. In Fig. 4, (R1, T1), (R2, T2), (R3, T3), and (R4, T4), the conductive pairs constitute respective communication lines. In general, crosstalk is achieved by capacitive and inductive coupling with adjacent conductors rather than with each conductive pair, ie, signal pairs. Therefore, the adjacent conductive pair between one communication line and the other communication line is also commonly referred to as a crosstalk pair. That is, in FIG. 4, (T1, R3), (R3, T2), (R2, T3), and (T3, R4) each form a crosstalk pair. Here, crosstalk by crosstalk pairs (T1, R3) (T3, R4) can be significantly reduced by conventional methods, i.e. through in-phase capacitive coupling. However, studies by the inventors have found that crosstalk by crosstalk pairs (R3, T2) (R2, T3) is not sufficiently reduced by capacitive coupling. In addition, it is considered that crosstalk by the crosstalk pairs R3 and T2 (R2 and T3) is greatly influenced by inductive coupling rather than capacitive coupling. In fact, as a result of detecting the magnetic field emission amount with respect to the configuration shown in FIG. 4, the inventors confirmed that the magnetic field amount emitted in the spaces of the conductive pairs T2 and R2 is considerably large as indicated by arrows in FIG. 5.

6 is a conceptual diagram illustrating crosstalk by crosstalk pairs R3 and T2 (R2 and T3), in which reference numeral R denotes a termination resistance corresponding to a communication terminal.

In FIG. 6, when the conductive pairs T3 and R3 (T2 and R2) form a closed loop and a current such as I1 flows through the conductive pairs T3 and R3, the magnetic field as indicated by the dotted line in the drawing shows the corresponding conductor. It happens in the center. The magnetic field emission is largely formed in the space portions of the conductive pairs T2 and R2 as described with reference to FIG. 5. On the other hand, if the magnetic field in the above-described direction is formed to affect the conductive pairs T2 and R2, current flows in the conductive pairs T2 and R2 in a direction to cancel the magnetic field, and thus corresponds to I2 as shown in the drawing. Current flow is generated. The induced current corresponds to a noise signal for the original signal transmitted through the conductive pairs T2 and R2.

7 is a conceptual diagram illustrating the basic concept of the present invention.

In FIG. 7, the conductive pairs T3 and R3 and the conductive pairs T2 and R2 are reversed in the first and second portions by arranging the conductive pairs T2 and R2 with respect to the conductive pairs T3 and R3. It is configured to perform magnetic coupling of phase. That is, in the first part of FIG. 7, when the current I1 flows through the conductive pairs T3 and R3 as described with reference to FIG. 6, the current I2 flows into the conductive pairs T2 and R2 accordingly. . In addition, in the second part, when the current I1 flows through the conductive pairs T3 and R3, the induced current I2 'flows through the conductive pairs T2 and R2, whereby the conductive pairs T2 and R2 Since the first and second portions are arranged to intersect with the conductive pairs T3 and R3, the induced currents I2 and I2 'induced in the conductive pairs T2 and R2 are set in opposite directions. Accordingly, since the induced currents I2 and I2 'in the first and second portions cancel each other, the lengths of the first and second portions are appropriately set so that the magnitudes of the induced currents I2 and I2' are adjusted. Cross-linking in the conductive pairs T2 and R2 generated by the conductive pairs T3 and R3 is completely eliminated if they become identical to each other.

On the other hand, in the configuration of FIG. 7, crosstalk is arranged so as to crosstalk the conductive pairs T3 and R3 to the conductive pairs T3 and R3, but this is done to remove the crosstalk with respect to the conductive pairs T2 and R2. ) Can be achieved by arranging That is, the present invention relates to an electrical connector having a plurality of conductive pairs arranged adjacently, wherein the at least one conductive pair is arranged to intersect with an adjacent conductive pair so as to eliminate inductive crosstalk occurring between the conductive pairs. It is characterized by. In FIG. 7, the capacitance component C formed between the conductive lines T3 and T2 (R3 and R2) is for compensating for capacitive crosstalk between the crosstalk pairs T3 and R2 (T2 and R3).

Meanwhile, in the configuration of FIG. 7, the path change for cross-aligning the conductive pairs T2 and R2 changes the structure of the terminal pin 23 of the plug 2 in FIGS. 2 and 3, or the modular jack 1. In this way, it is possible to change the structure of the terminal pin (13a) or the insert (13). In this case, however, it is important to effectively eliminate crosstalk by setting the lengths of the first and second portions appropriately in FIG. 7 and to minimize inductive crosstalk occurring in the path change portion.

Fig. 8 is a perspective view showing the appearance of the insert when the crosstalk pair is reversely arranged by changing the structure of the insert. 9 is a perspective view when the insert is seen from the A side in FIG. The insert 80 shown in FIGS. 8 and 9 is a portion where the A side is electrically coupled with the terminal pin 23 of the plug 2 in FIGS. 2 and 3, so that the connector pin of the A side is shown in FIG. 4. In the same order as the terminal pin 23 of the plug (2), that is, in the order of R1, T1, R3, T2, R2, T3, R4, T4.

Meanwhile, the side B of the insert 80 in FIG. 8 is a portion in which the connector pin 13a is electrically coupled to the substrate 12 in FIG. 2. However, at this time, the arrangement order of the connector pins 13a is arranged in the order of R1, T1, R3, R2, T2, T3, R4, and T4, compared to the arrangement of the connector pins 13a inserted into the A side. , The position of R2) has been changed. That is, as illustrated in FIG. 7, the conductive pairs T2 and R2 are reversely arranged with respect to the conductive pairs T3 and R3.

10 shows the arrangement of the connector pins inserted into the body 13b of the insert 80. 11A is a perspective view showing the main part structure when the insert 80 shown in FIGS. 8 and 9 is viewed from the side A, and FIG. 11B is a view showing the insert 80 shown in FIGS. 8 and 9 from the B side. It is a perspective view which shows the principal part structure when it looked at.

As can be seen in the drawing, the conducting wire T2 is straight in the insert 80 body 13b and is bent to the right and goes straight. By being arranged so that the conductors T2 and R2 cross each other and are arranged in the body 13b of the insert 80.

In addition, in FIG. 10, while the middle portion of the conductive wire T3 is divided into two paths, one path thereof is disposed to correspond to the conductive wire T2, and the other path is disposed to correspond to the conductive wire T4. Also, the middle portion of the conductive wire R3 is divided into two paths, one of which is disposed to correspond to the conductive wire R1, and the other of the conductive wires R3 is disposed to correspond to the conductive wire R2. These are capacitive bonds generated between the conducting wire T3 and the conducting wires T2 and T4, the conducting wire R3, and the conducting wires R1 and R2. FIG. 12 shows a circuit configuration corresponding to the arrangement of the conductors of the insert 80. As shown in FIG. 12, the capacitive coupling is a cross-talk pair T1, R3 (R3, T2) (R2, T3). To compensate for capacitive crosstalk by (T3, R4).

Meanwhile, in FIG. 11, when the structure of the conductive wires disposed in the insert 80 body 13b is viewed, the conductive pairs T2 and R2 are interconnected with respect to an imaginary surface interconnecting the conductive pairs T3 and R3 on the A side. The imaginary plane is formed at an angle of 80 ° to 90 °, ideally 90 ° to minimize the inductive effect of the conductive pairs T3 and R3 on the conductive pairs T2 and R2. The conductive pairs T3 and R3 are electrically conductive, with the virtual surfaces interconnecting the conductive pairs T2 and R2 at an angle of 10 to 0 degrees, ideally 0 degrees, with respect to the virtual surfaces interconnecting T3 and R3. The inductive effect on the pair (T2, R2) is to be maximized. This is to minimize inductive crosstalk occurring in the path change portion as described in FIG. 7. In this case, the lengths of the conductive wires in which the conductive surfaces T3 and R3 and the virtual surfaces of the conductive pairs T2 and R2 form an angle of 10 to 0 ° correspond to the length of the second portion as described with reference to FIG. 7. This will be set corresponding to the length of the first part, that is, the length of the terminal pin 23 in the plug 2.

In the above embodiment, the conductive pairs T3 and R3 and the conductive pairs generated in the plug 2 are reversely arranged by crossing the conductive pairs T2 and R2 with respect to the conductive pairs T3 and R3 in the insert 80. Inductive crosstalk between (T2, R2) can be minimized.

Further, in the insert 80, each of the conductive wires R1 to R4, T1 to T4 is arranged in a multilayered wiring structure, while the conductive wires T3, T2 and T4, R3 and R1 and R2 are arranged. By placing them at mutually corresponding positions, the conductors are capacitively coupled. Accordingly, capacitive crosstalk between the crosstalk pairs T1 and R3 (R3 and T2) (R2 and T3) (T3 and R4) generated by the plug 2 is removed by the capacitive coupling described above.

In the above embodiment, the conductive pairs T3 and R3 inserted into the insert 80 on the plug 2 side while arranging the conductive wires R1 to R4 and T1 to T4 in a multilayer wiring structure in the insert 80. Cross-linking the conductive pairs (T2, R2) with respect to the virtual planes interconnecting each other), thereby minimizing crosstalk caused by rerouting of the conductive pairs (T2, R2). .

Therefore, according to the above embodiment, it is possible to realize a low crosstalk electrical connector suitable for high-speed data transmission in which inductive crosstalk occurs seriously.

In addition, this invention is not limited to the said Example, It can implement by making a various deformation | transformation within the range which does not deviate from the technical summary of this invention. The present invention may be limited only by the claims herein.

As described above, according to the present invention, it is possible to realize an electrical connector capable of providing a stable crosstalk value even at a high frequency and a communication speed.

Claims (9)

delete And a plug and a modular jack, wherein the plug is disposed between the first conductive pair having the first and second conductive wires and the first conductive pair of the first conductive pair and adjacent to the first conductive wire. An electrical connector comprising a second conductive pair having a third conductive line and a fourth conductive line disposed adjacent to the second conductive line, And wherein the third and fourth conductors are arranged to cross each other so that the third conductor is disposed adjacent to the second conductor and the fourth conductor is disposed adjacent to the first conductor. The method of claim 2, And wherein the crossover arrangement of the second and fourth leads is in a modular jack. The method of claim 2, And wherein the crossover arrangement of the second and fourth leads is in a plug. The method of claim 2, The modular jack has a connector pin electrically coupled with the plug, and a body for fixing the connector pin, wherein the connector pin has a multi-layered wiring structure in the body. The method of claim 5, The incidence plane in which the virtual plane interconnecting the second conductive pair is incident to the body with respect to the incidence plane in which the first conductive pair is interconnected into the body forms an angle of 80 to 90 °. Characterized by electrical connectors. The method of claim 5, An exit surface from which the virtual surface interconnecting the second conductive pairs exits from the body with respect to an exit surface from which the virtual surface interconnecting the first conductive pairs exits from the body. Electrical connector, characterized in that forming. The method according to claim 2 or 7, Wherein the length of the conductive wire between the virtual surface of the first conductive pair and the virtual surface of the second conductive pair forms an angle of 10 to 0 degrees is set based on the length of the first and second conductive wire pairs in the plug. Electrical connector. The method according to claim 2 or 5, And wherein the first conductive wire and the third conductive wire, the second conductive wire and the fourth conductive wire are capacitively coupled to each other.

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