Methods and apparatus for reducing crosstalk in electrical connectors

• US 8,550,850 B2
• Filed: 09/07/2012
• Issued: 10/08/2013
• Est. Priority Date: 02/12/2004
• Status: Expired due to Fees

• Current Assignee: Panduit Corporation
• Original Assignee: Panduit Corporation
• Inventors: Caveney, Jack E., Bolouri-Saransar, Masud
• Primary Examiner(s): ZARROLI, MICHAEL C
• Application Number:
  US13/606,420
• Publication Number:
  US 20120329326A1
• Time in Patent Office: 396 Days
• Field of Search: 439/620.1, 439/676, 439/941, 439/620.11, 439/620.13
• US Class Current: 439/620.1
• CPC Class Codes: H01R 13/6461 Means for preventing cross-talk
• CPC Class Codes: H01R 13/6464 by adding capacitive elements
• CPC Class Codes: H01R 13/6466 on substrates, e.g. printed circuit boards [PCB]
• CPC Class Codes: H01R 13/66 Structural association with built-in electrical component coupling devices having concentrically or coaxially-arranged contacts H01R24/38
• CPC Class Codes: H01R 13/6658 on printed circuit board H01R13/6666 - H01R13/6691 take precedence
• CPC Class Codes: H01R 24/64 for high frequency, e.g. RJ 45
• CPC Class Codes: H05K 1/0228 Compensation of cross-talk by a mutually correlated lay-out of printed circuit traces, e.g. for compensation of cross-talk in mounted connectors balanced signal pairs H05K1/0245
• CPC Class Codes: H05K 1/162 incorporating printed capacitors
• CPC Class Codes: H05K 2201/09672 Superposed layout, i.e. in different planes parallel traces in one plane H05K2201/09236
• CPC Class Codes: H05K 2201/10189 Non-printed connector
• CPC Class Codes: Y10S 439/941 Crosstalk suppression

Abstract

A communication jack having crosstalk compensation features for overall crosstalk interference reduction is disclosed. In one embodiment, the jack is configured to receive a plug to form a communication connection, and comprises jack contacts disposed in the jack, with each contact having at least a first surface and a second surface. Upon the plug being received by the jack, the plug contacts interface with the first surface of the jack contacts. The jack further includes a first capacitive coupling connected between two pairs of jack contacts to compensate for near end crosstalk, with the first capacitive coupling being connected to the pairs of jack contacts along the second surface adjacent to where the plug contacts interface with the jack contacts. A far end crosstalk compensation scheme is also set forth.

Claims

1. A communication jack configured to receive a plug to form a communication connection, comprising:

a plurality of jack contacts, which consist of metal cantilever beams, the plurality of jack contacts at least partially disposed within a plug receiving cavity in the jack, wherein each contact has at least a first surface and a second surface, wherein, upon the plug being received by the jack, a plurality of plug contacts interface with the first surface of the plurality of jack contacts; and

a first capacitive coupling connected between at least one pair of the plurality of jack contacts, wherein the first capacitive coupling is electrically and mechanically connected to the at least one pair of jack contacts such that the first capacitive coupling is suspended at least partially within the plug receiving cavity by the plurality of jack contacts.

2. The communication jack of claim 1 wherein the first capacitive coupling is electrically and mechanically connected to the at last two pairs of jack contacts at the second surface of the jack contacts.

3. The communication jack of claim 1 wherein the first capacitive coupling is connected between the at least two pairs of jack contacts via flexible members.

4. The communication jack of claim 1 wherein the first capacitive coupling is at least partially suspended in the plug receiving cavity within a flexible printed circuit.

5. The communication jack of claim 1 wherein the first capacitive coupling is connected at least between circuit paths 3:

5 and 4;

6 of the jack.