ELECTRICAL CONNECTORS AND PRINTED CIRCUITS HAVING BROADSIDE-COUPLING REGIONS

• US 20120034822A1
• Filed: 08/03/2010
• Published: 02/09/2012
• Est. Priority Date: 08/03/2010
• Status: Active Grant

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: Tyco Electronics Corporation (TE Connectivity Ltd. (United Kingdom))
• Inventors: BOPP, STEVEN RICHARD, NAY, NEIL KTUL
• Granted Patent: US 8,435,082 B2
• Time in Patent Office: Days
• US Class Current: 439/676
• CPC Class Codes: H01R 13/6461 Means for preventing cross-talk
• CPC Class Codes: H01R 13/6466 on substrates, e.g. printed circuit boards [PCB]
• CPC Class Codes: H01R 13/6469 on substrates
• CPC Class Codes: H01R 2107/00 Four or more poles
• 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 1/0239 Signal transmission by AC coupling
• CPC Class Codes: H05K 1/11 Printed elements for providing electric connections to or between printed circuits
• CPC Class Codes: H05K 2201/07 Electric details
• CPC Class Codes: H05K 2201/10189 Non-printed connector

Abstract

An electrical connector that includes a circuit board having a board substrate that has opposite board surfaces and a thickness measured along an orientation axis that extends between the opposite board surfaces. The circuit board has associated pairs of input and output terminals and signal traces that electrically connect the associated pairs of input and output terminals. The input and output terminals being configured to communicatively coupled to mating and cable conductors, respectively. Each associated pair of input and output terminals is electrically connected through a corresponding signal trace that has a conductive path extending along the board substrate between the corresponding input and output terminals. At least two signal traces form a broadside-coupling region in which the conductive paths of the at least two signal traces are stacked along the orientation axis and spaced apart through the thickness and extend parallel to each other for a crosstalk-reducing distance.

Claims

1. An electrical connector comprising:

mating conductors configured to engage plug contacts from a modular plug at a mating interface, the mating conductors comprising differential pairs; and

a circuit board including a board substrate that has opposite board surfaces and a thickness measured along an orientation axis extending between the opposite board surfaces, the circuit board having associated pairs of input and output terminals attached to the board substrate and signal traces that electrically connect the associated pairs of input and output terminals, the input terminals being communicatively coupled to the mating conductors and the output terminals being configured to communicatively couple to cable conductors of a communication cable;

wherein each associated pair of input and output terminals is electrically connected through a corresponding signal trace that has a conductive path extending along the board substrate between the corresponding input and output terminals, at least two signal traces forming a broadside-coupling region in which the at least two signal traces are stacked along the orientation axis and spaced apart by the board substrate, the at least two signal traces extending parallel to each other through the broadside-coupling region for a crosstalk-reducing distance, the at least two signal traces being electrically connected to separate differential pairs.

2. The electrical connector of claim 1 wherein the mating conductors and the plug contacts generate offensive crosstalk at a mating interface when engaged, the crosstalk-reducing distance being configured to improve an electrical performance.

3. The electrical connector of claim 1 wherein the at least two signal traces comprise at least three signal traces that are stacked along the orientation axis and spaced apart by the board substrate and extend parallel to one other for the crosstalk-reducing distance in the broadside-coupling region, the at least three signal traces being electrically connected to two differential pairs.

4. The electrical connector of claim 3 wherein the at least three signal traces include first, second, and third signal traces, and wherein the first, second, and third signal traces are equally spaced apart from each other in the broadside-coupling region.

5. The electrical connector of claim 1 wherein the differential pairs include first and second differential pairs of mating conductors, the first differential pair being located between the mating conductors of the second differential pair thereby generating offensive crosstalk with the plug contacts when the mating conductors and the plug contacts are engaged at a mating interface, each of the at least two signal traces being communicatively coupled to one mating conductor of the first differential pair or the second differential pair.

6. The electrical connector of claim 5 wherein the at least two signal traces comprise only three or only four signal traces.

7. The electrical connector of claim 1 wherein the board substrate includes opposite end portions and a center portion that extends between the end portions, the input terminals being located in the center portion and the output terminals being located in the end portions.

8. The electrical connector of claim 7 wherein the input terminals that are electrically connected to the at least two signal traces are located in the center portion and the output terminals that are electrically connected to the at least two signal traces are located at a common end portion.

9. The electrical connector of claim 1 wherein the at least two signal traces have a substantially common width, the broadside-coupling region having a width that is approximately equal to the common width.

10. The electrical connector of claim 1 wherein the circuit board further comprises digital fingers that electromagnetically couple two input terminals.

11. The electrical connector of claim 1 wherein the conductive paths of the at least two signal traces change direction at least once.

12. The electrical connector of claim 1 wherein the at least two signal traces have a common width, the crosstalk-reducing distance being greater than at least three times the common width.

13. A printed circuit configured to communicatively couple to mating and loading conductors, the printed circuit comprising:

a dielectric substrate that has opposite surfaces and a thickness measured along an orientation axis extending between the opposite surfaces;

associated pairs of input and output terminals attached to the dielectric substrate, the input terminals being configured to communicatively couple to the mating conductors and the output terminals being configured to communicatively couple to the loading conductors; and

signal traces electrically connecting the associated pairs of input and output terminals, the signal traces comprising differential pairs, wherein each associated pair of input and output terminals is electrically connected through a corresponding signal trace that has a conductive path extending along the dielectric substrate between the corresponding input and output terminals, at least two signal traces from separate differential pairs forming a broadside-coupling region in which the at least two signal traces are stacked along the orientation axis and spaced apart by the board substrate, the at least two signal traces extending parallel to each other through the broadside-coupling region for a crosstalk-reducing distance.

14. The printed circuit of claim 13 wherein the at least two signal traces from separate differential pairs comprise at least three signal traces from two differential pairs, the at least three signal traces being stacked along the orientation axis and spaced apart through the thickness and extending parallel to one other for the crosstalk-reducing distance in the broadside-coupling region.

15. The printed circuit of claim 14 wherein the at least three signal traces include first, second, and third signal traces, the first, second, and third signal traces being equally spaced apart from each other in the broadside-coupling region.

16. The printed circuit of claim 13 wherein the dielectric substrate includes opposite end portions and a center portion that extends between the end portions, the input terminals being located in the center portion and the output terminals being located in the end portions.

17. The printed circuit of claim 13 wherein the dielectric substrate is a rigid board substrate.

18. An electrical connector comprising:

a housing having an interior chamber that is configured to receive a modular plug;

a terminal sub-assembly comprising a loading body configured to hold cable conductors of a communication cable;

a contact sub-assembly at least partially disposed within the interior chamber of the housing, the contact sub-assembly comprising;

mating conductors configured to engage plug contacts from the modular plug at a mating interface, the mating conductors comprising differential pairs; and

a circuit board including a board substrate that has opposite board surfaces and a thickness measured along an orientation axis extending between the opposite board surfaces, the circuit board having associated pairs of input and output terminals attached to the board substrate and signal traces that electrically connect the associated pairs of input and output terminals, the input terminals being communicatively coupled to the mating conductors and the output terminals being configured to communicatively couple to the cable conductors;

wherein each associated pair of input and output terminals is electrically connected through a corresponding signal trace that has a conductive path extending along the board substrate between the corresponding input and output terminals, at least two signal traces forming a broadside-coupling region in which the at least two signal traces are stacked along the orientation axis and spaced apart by the board substrate, the at least two signal traces extending parallel to each other through the broadside-coupling region for a crosstalk-reducing distance, the at least two signal traces being electrically connected to separate differential pairs.

19. The electrical connector of claim 18 wherein the mating conductors and the plug contacts generate offensive crosstalk at the mating interface when engaged, the crosstalk-reducing distance being configured to facilitate compensating for the offensive crosstalk.

20. The electrical connector of claim 18 wherein the at least two signal traces comprise at least three signal traces that are stacked along the orientation axis and spaced apart through the thickness and extend parallel to one other for the crosstalk-reducing distance.