Electrical connectors and printed circuits having broadside-coupling regions

• US 8,435,082 B2
• Filed: 08/03/2010
• Issued: 05/07/2013
• Est. Priority Date: 08/03/2010
• Status: Expired due to Fees

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: Tyco Electronics Corporation (TE Connectivity Limited)
• Inventors: Bopp, Steven Richard, Nay, Neil Ktul
• Primary Examiner(s): Gilman, Alexander
• Application Number:
  US12/849,593
• Publication Number:
  US 20120034822A1
• Time in Patent Office: 1,008 Days
• Field of Search: 439/676, 439/941, 439/620.21, 307/147, 333/1, 333/5
• 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 first and second 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 coupled to the board substrate, 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 the circuit board includes signal traces in which each associated pair of input and output terminals is electrically connected through one of the signal traces, the signal traces having a conductive path extending along the board substrate that transmits signal current between the corresponding input and output terminals, the signal traces including first and second signal traces that are associated with the first differential pair and third and fourth signal traces that are associated with the second differential pair, wherein the first, second, and third signal traces form a broadside-coupling region in which the first, second, and third signal traces are stacked along the orientation axis and spaced apart by the board substrate, the first, second, and third signal traces extending parallel to one another through the broadside-coupling region for a crosstalk-reducing distance.

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 dimensioned to at least partially compensate for the offensive crosstalk.

3. The electrical connector of claim 1 wherein the first, second, and third signal traces are equally spaced apart from each other in the broadside-coupling region.

4. The electrical connector of claim 1 wherein one of the first or second differential pairs is located between the mating conductors of the other of the first or second differential pairs thereby generating offensive crosstalk with the plug contacts when the mating conductors and the plug contacts are engaged at a mating interface.

5. The electrical connector of claim 1 wherein the fourth signal trace also extends parallel to the first, second, and third signal traces in the broadside-coupling region.

6. 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.

7. The electrical connector of claim 6 wherein the input terminals that are electrically connected to the first, second, and third signal traces are located in the center portion and the output terminals that are electrically connected to the first, second, and third signal traces are located at a common end portion.

8. The electrical connector of claim 1 wherein the first, second, and third signal traces have a substantially common width, the broadside-coupling region having a width that is approximately equal to the common width.

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

10. The electrical connector of claim 1 wherein the conductive paths of the first, second, and third signal traces change direction at least once through the broadside-coupling region.

11. The electrical connector of claim 1 wherein the first, second, and third signal traces have a common width, the crosstalk-reducing distance being greater than at least three times the common width.

12. The electrical connector of claim 1, wherein the third signal trace extends between the first and second signal traces in the broadside-coupling region.

13. The electrical connector of claim 12, wherein the fourth signal trace extends parallel to the first, second, and third signal traces in the broadside-coupling region, the second signal trace extending between the third and fourth signal traces.

14. 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 first and second differential pairs in which the first differential pair includes first and second signal traces and the second differential pair includes third and fourth signal traces, wherein each associated pair of input and output terminals is electrically connected through a corresponding one of the signal traces, each one of the first, second, third, and fourth signal traces having a conductive path that extends along the dielectric substrate and transmits signal current between the corresponding input and output terminals, the first, second, and third signal traces forming a broadside-coupling region in which the first, second, and third signal traces are stacked along the orientation axis and spaced apart by the board substrate, the first, second, and third signal traces extending parallel to each other through the broadside-coupling region for a crosstalk-reducing distance.

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

16. The printed circuit of claim 14 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 14 wherein the dielectric substrate is a rigid board substrate.

20. The electrical connector of claim 14, wherein the fourth signal trace extends parallel to the first, second, and third signal traces in the broadside-coupling region.

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 first and second 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 coupled to the board substrate the input terminals being communicatively coupled to the mating conductors and the output terminals being configured to communicatively couple to the cable conductors;

wherein the circuit board includes signal traces in which each associated pair of input and output terminals is electrically connected through one of the signal traces, the signal traces having a conductive path extending along the board substrate that transmits signal current between the corresponding input and output terminals, the signal traces including first and second signal traces that are associated with the first differential pair and third and fourth signal traces that are associated with the second differential pair, the first, second, and third signal traces forming a broadside-coupling region in which the first, second, and third signal traces are stacked along the orientation axis and spaced apart by the board substrate, the first, second, and third signal traces extending parallel to each other through the broadside-coupling region for a crosstalk-reducing distance.

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 dimensioned to facilitate compensating for the offensive crosstalk.