Communication connector with improved crosstalk compensation

• US 8,182,295 B2
• Filed: 11/03/2011
• Issued: 05/22/2012
• Est. Priority Date: 11/03/2009
• Status: Expired due to Fees

• Current Assignee: Panduit Corporation
• Original Assignee: Panduit Corporation
• Inventors: Straka, Frank M., Tellas, Ronald L.
• Primary Examiner(s): Patel, Tulsidas C
• Assistant Examiner(s): Nguyen, Phuongchi
• Application Number:
  US13/288,709
• Publication Number:
  US 20120052744A1
• Time in Patent Office: 201 Days
• Field of Search: 439/676, 439/941, 439/620.11, 439/620.17, 439/620.23
• US Class Current: 439/676
• CPC Class Codes: H01R 13/6466 on substrates, e.g. printed circuit boards [PCB]
• CPC Class Codes: H01R 13/6625 with capacitive component
• 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: H01R 4/2425 Flat plates, e.g. multi-layered flat plates
• 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 1/118 specially for flexible printed circuits, e.g. using folded portions
• CPC Class Codes: H05K 1/147 at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit H05K1/148 takes precedence
• CPC Class Codes: H05K 1/162 incorporating printed capacitors
• CPC Class Codes: H05K 2201/09172 Notches between edge pads
• 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 has a housing with a face having a plug receiving aperture. A plurality of conductive path pairs extends from corresponding plug interface contacts located at the plug receiving aperture to corresponding output terminals. A first circuit board is connected to the plug interface contacts and a second circuit board is connected to the plug interface contacts and the output terminals. The first circuit board has a first single stage of crosstalk compensation with opposite polarity of the crosstalk of a plug for a first combination of the conductive path pairs. The second circuit board includes a second single stage of opposite polarity crosstalk compensation for some of the conductive path pairs not compensated on the first circuit board. The stages cancel substantially all of the crosstalk caused by the plug, for the signal operating frequencies, for corresponding combinations of the conductive path pairs.

Claims

1. A communication jack for compensating for a source of near-end crosstalk in a mated communication plug over a range of signal operating frequencies, the mated plug including a plurality of plug contacts, comprising:

a housing having a first face with a plug receiving aperture therein;

a plurality of conductive path pairs directly extending from corresponding plug interface contacts located at said plug receiving aperture to corresponding output terminals, said plurality of conductive path pairs including a circuit board connected to said plug interface contacts beyond where the plug contacts engage said plug interface contacts, said circuit board being not in direct contact with said output terminals, said circuit board including a single stage of crosstalk compensation with opposite polarity of the crosstalk of the plug for at least one combination of said conductive path pairs, wherein said single stage of crosstalk compensation cancels substantially all of the near-end crosstalk caused by the plug, over the range of signal operating frequencies, for said at least one combination of said conductive path pairs, said plug interface contacts including a plug contact point approximately where the plug contacts engage said plug interface contacts, said single stage of crosstalk compensation being located a physical distance from said plug contact point and along said plurality of conductive path pairs, and said single stage of crosstalk providing compensation approximately equivalent to a maximum of 3.0 degrees of electrical phase of the signal at the highest frequency in the range of signal operating frequencies.

2. The communication jack of claim 1, wherein said physical distance is between 1.5 degrees and 3.0 degrees of electrical phase of the signal at the highest frequency in the range of signal operating frequencies.

3. The communication jack of claim 1, wherein said physical distance is between 2.5 degrees and 2.9 degrees of electrical phase of the signal at the highest frequency in the range of signal operating frequencies.

4. A communication system for connection to at least one communication plug over a range of signal operating frequencies, the communication plug having a source of crosstalk, said communication system comprising:

electrical equipment having at least one jack receiving aperture;

a communication jack for connection to said electrical equipment, said communication jack including a housing having a first face with a plug receiving aperture therein and a plurality of conductive path pairs directly extending from corresponding plug interface contacts located at said plug receiving aperture to corresponding output terminals, said plurality of conductive path pairs including a circuit board connected to said plug interface contacts beyond where the plug contacts engage said plug interface contacts, said circuit board being not in direct contact with said output terminals, said circuit board including a single stage of crosstalk compensation with opposite polarity of the crosstalk of the plug for at least one combination of said conductive path pairs, wherein said single stage of crosstalk compensation cancels substantially all of the near-end crosstalk caused by the plug, over the range of signal operating frequencies, for said at least one combination of said conductive path pairs, said plug interface contacts including a plug contact point approximately where the plug contacts engage said plug interface contacts, said single stage of crosstalk compensation being located a physical distance from said plug contact point and along said plurality of conductive path pairs, and said single stage of crosstalk providing compensation approximately equivalent to a maximum of 3.0 degrees of electrical phase of the signal at the highest frequency in the range of signal operating frequencies.

5. The communication system of claim 4, wherein said physical distance is between 1.5 degrees and 3.0 degrees of electrical phase of the signal at the highest frequency in the range of signal operating frequencies.

6. The communication system of claim 4, wherein said physical distance is between 2.5 degrees and 2.9 degrees of electrical phase of the signal at the highest frequency in the range of signal operating frequencies.