EP2047571A1 - Plug connector for telecommunications and data technology - Google Patents

Abstract

The connector has ferrite casings (37), which are fastened as a separate component to a ferrite casing holder. The ferrite casing holder is designed as two pieces and includes a front part (38) and a rear part (39), which respectively include bases (40). The bases have recesses (41), which are set around 90 degrees to each other and accommodate the ferrite casings. The base has cylindrical attachments with clamping knobs. The ferrite casings are firmly clamped between two cylindrical attachments with the clamping knobs on the front and rear parts.

Description

 Connectors for telecommunications and data technology

The invention relates to a connector for telecommunication and data technology according to the preamble of claim 1.

Such connectors are, for example, RJ45 sockets or plugs, such a generic RJ45 socket being described in WO 02/15339.

Further, from DE 298 19 314 Ul a female connector known, with a dielectric connector housing and disposed in the connector housing contacts for making a connection to the contacts of an inserted into an insertion of the connector housing associated connector, as well as external connection contacts for producing an electrical A connection to the female connector, comprising an arrangement for galvanic decoupling of the contacts for the associated connector from the external terminal contacts and with a filter device, wherein an insertable substantially completely in the connector housing element which both the contacts for the associated connector and the external '

Holding contacts and in which both the arrangement for galvanic decoupling and the filter device is arranged. The arrangement for galvanic decoupling and the filter device comprise inductances, which are formed by coils with ferrite ring core, whose center axes are each aligned parallel to each other. Transformers for galvanic decoupling act as a bandpass, which is disadvantageous in particular for broadband transmissions to CAT6 as well as 10 Gigabit / s Ethernet applications.

In CAT6 or 10 Gigabit / s Ethernet applications, in addition to the well-known cross talk effects within a connector, such as NEXT (Near End Cross Talk) and FEXT (Far End Cross Talk), an increased influence of the so-called ANEXT (Alien Near End Cross Talk) or AFEXT (Alien Far End Cross Talk) in adjacent connectors on. The influence of the ANEXT or AFEXT increases with higher

Signal transmission rates too strong. This AXT (Alien Cross Talk) is made up of the direct AX between the connectors and the indirect AX via the opposite to common mode conversion of the connector, the common mode coupling between the connected cables and the DC to push-pull conversion in the faulty connector.

The invention is therefore based on the technical problem of providing a connector for telecommunications and data technology, by means of which the influence of the AXT is reduced at high transmission rates of CAT6 or 10 Gigabit / s Ethernet.

The solution of the technical problem results from the subject matter with the features of claim 1. Further advantageous embodiments of the invention will become apparent from the dependent claims.

For this purpose, a common-mode filter arrangement is assigned to each adapter pair. As a result, a disturbing common-mode signal is attenuated in pairs, so that this attenuated common-mode component does not lead to an AXT in an adjacent connector. At the same time, the common mode filter arrangement also attenuates coupled common mode signals from other connectors.

In a preferred embodiment, the common mode filter arrangement is formed as a common mode choke, which is arranged on a circuit board for the first and second contacts, wherein the common mode choke is preferably formed as an SMD component, resulting in a compact Construction allowed. The common mode choke is preferably electrically connected between the first and second contacts.

Alternatively or additionally, the common mode arrangement may be formed as a ferrite sleeve, wherein each pair of wires is assigned its own ferrite sleeve, whereas a single ferrite sleeve for the whole cable would have little effect. The reason for this is that the common-mode signals on the different wire pairs do not necessarily have the same direction. Therefore, the common mode noise must be reduced separately for each wire pair.

For the connection of the ferrite sleeves to the connector or the connector housing different embodiments are now possible.

In one embodiment, the ferrite sleeves are formed as a separate component and attached to the connector housing, for example, locked or glued. In addition, it is also possible to provide a separate ferrite sleeve holder which holds the ferrite sleeves, wherein the ferrite sleeve holder itself is held by the housing of the connector or the wires. Preferably, the ferrite sleeve holder is designed such that the individual ferrite sleeves do not touch and so magnetic couplings are avoided. In addition to the actual connector housing, the ferrite sleeves can also be arranged on a cable manager of the connector.

In an alternative embodiment, the connector housing and / or a hold-down and / or a cable manager consists at least partially of a ferrite material or contains ferrite material. For example, a cable manager may consist entirely of a ferrite material, through which the wire pairs are then carried out in their respective associated segment. Alternatively, the ferrite sleeves in the Connector housing are molded. It is also possible to add ferrite powder to the plastic spray material.

Preferably, a common mode filter arrangement takes place in the case of a plug connection both on the plug side and on the socket side, although the respective design of the common mode filter arrangement may be different.

The invention will be explained in more detail with reference to a preferred embodiment. The figures show:

1 is a schematic representation of a common mode choke on a circuit board for the first and second contacts,

2 is an exploded view of a connector (prior art),

Fig. 3 is an exploded view of a connector with ferrite sleeve holder and

Fig. 4 is an exploded view of a ferrite sleeve holder with ferrite sleeves.

2, a connector 1 is shown in an exploded view. The connector 1 comprises a connector housing 2, a printed circuit board 3, a hold-down 4 and a cable manager 5. The connector housing 2 is formed in the example shown as a female housing with various locking and insertion means. On the side surfaces of the connector housing 2 is formed with a shield plate 6. The printed circuit board 3 is equipped on its front with a set of second contacts 7 and on its rear side with a set of first contacts 8, which are formed as insulation displacement contacts. In each case a contact 7 is connected to a contact 8. The circuit board 3 is then inserted into the connector housing 2. In this case, cylindrical pins 9 of the connector housing 2 penetrate holes in the printed circuit board 3, so that the connector housing 2 and the printed circuit board 3 are adjusted to each other and fixed. The formed as RF contacts contacts 7 then protrude into an accessible from the front of the connector housing opening. Subsequently, the hold-down device 4 is pushed over the contacts 8 of the second set and locked with the connector housing 2. For this purpose, the hold-down 4 is formed on the front side with locking lugs 10 and has through openings 11 for the insulation displacement contacts 8. Furthermore, the hold-down 4 is formed with two latching hooks 12, which serve for latching with a cable manager 5. The cable manager 5 is formed substantially square and has an opening in the middle, around which a cylindrical projection 14 is arranged. The opening extends continuously from the back to the front, wherein in the opening a guide cross 17 is arranged, that divides the opening into four segments. In each case, an associated wire pair of a data cable is guided in a segment. With regard to the further construction of the connector, reference is hereby expressly made to WO 02/15339.

FIG. 1 schematically shows a first embodiment of the common mode filter arrangement for a plug connector according to FIG. 2. On the circuit board 3, two associated insulation displacement contacts 8 are shown, by means of which the wires of a pair of wires are contacted. The two insulation displacement contacts 8 are electrically connected via a respective conductor track 20, 21 to an SMD component 22, which comprises a common mode choke 23 with a ferrite ring 24. Via printed conductors 25, 26 as well as vias, not shown, the SMD element 22 is connected to the associated RF contacts 7 on the other side of the printed circuit board 3. This will be in pairs the Common-mode signal reduced on the wire pair, so that this wire pair represents a lesser source of interference for adjacent connectors. In the illustrated embodiment, the common mode choke 23 has been shown only for a pair of wires. It is understood that in a FU45 socket according to FIG. 2 four common-mode chokes 23 are used for the four wire pairs. Alternatively, the connector housing 2 or the hold-down 4 and / or the cable manager 5 made of ferrite material or contain ferrite material.

In Fig. 3, an alternative connector 1 is shown in the form of a plug, wherein the connector housing is formed in two parts and an upper part 31 and a lower part 32 includes, which are latched together. For this purpose, the upper part 31 is formed with latching hooks 33, which engage in latching openings 34 of the lower part 32. In the lower part 32, a cable manager 35 is arranged, which ensures a defined guidance of the wires to the RF contacts 30 of the plug. Behind the cable manager 35, a ferrite sleeve holder 36 is arranged, which serves to hold four ferrite sleeves 37. The wires to be connected are guided in pairs through the ferrite sleeve 37 and then in the cable manager 35. The ferrite sleeve holder 36 is designed such that the four ferrite sleeves 37 do not touch, so that feedbacks of magnetic currents are avoided. The ferrite sleeve holder 36 is not separately attached to the housing, but is held by the wires or pressed together upper and lower parts 31, 32. The ferrite sleeve holder 36 is preferably made of plastic.

4, the ferrite sleeve holder 36 is formed in two parts and comprises a front part 38 and a rear part 39. The front part 38 comprises a base body 40, the indentations 41, each offset by 90 ° to each other. These recesses 41 receive the ferrite sleeves 37. Furthermore, the base body 40 cylindrical lugs 42 with clamping nubs 43 on. As can be seen in Fig. 3, a ferrite sleeve 37 is clamped between four cylindrical lugs 42 with clamping knobs 43. In this case, front part 38 and rear part 39 are constructed almost identically. To connect front part 38 and rear part 39 with each other, each have two cylindrical projections 42 pins 44, which penetrate into an opening 45 of the opposite cylindrical projection 42. Next, the main body 40 still retaining pin 46.

LIST OF REFERENCE NUMBERS

1 connector

2 connector housings

3 circuit board

4 hold downs

5 cable manager

6 shroud

7 H F contacts

Insulation displacement contacts

9 cylindrical pins

10 locking lugs

11 openings

12 snap hooks

14 cylindrical approach

17 Guide cross 0 Conductor 1 Conductor 2 SMD component 3 Common mode choke 4 Ferrite ring 5 Conductor 6 Conductor track 0 H F contacts 1 Upper part 2 Lower part 3 Detent hooks 4 Detent openings 5 Cable manager 6 Ferrite sleeve holder 7 Ferrite sleeve 8 Front part Rear part of main body indentations cylindrical approaches Clamping nubs Spigot openings Retaining pin

Claims

claims 1. Connector for telecommunications and data technology for connecting a symmetrical data cable, wherein the connector comprises an electrically insulating connector housing and first contacts and second contacts, wherein by means of the first contacts a plurality of pairs of wires of a symmetrical data cable are contacted and by means of the second contacts an electrical contact can be produced with the contacts of a complementary connector, wherein each two first contacts are assigned to a pair of wires and each first contact is associated with a second contact, wherein the first contacts are electrically connected to their associated second contacts, characterized in that each pair of wires each have a common mode filter Assignment is assigned. 2. Connector according to claim 1, characterized in that the first and second contacts (7, 8) via a printed circuit board (3) are connected, wherein the common mode filter arrangement is designed as a common mode choke (23) on the circuit board (3). is arranged. 3. Connector according to claim 2, characterized in that the common mode choke (23) is designed as an SMD component (22). 4. Connector according to one of the preceding claims, characterized in that the common mode filter arrangement is formed as a ferrite sleeve. 5. Connector according to claim 4, characterized in that the ferrite sleeves are attached as separate components to the connector housing (2) or a ferrite sleeve holder (36). 6. Connector according to claim 4, characterized in that the connector housing (2) consists at least partially of a ferrite material or contains ferrite material.