Communication connector with inductive compensation

• US 6,379,157 B1
• Filed: 08/18/2000
• Issued: 04/30/2002
• Est. Priority Date: 08/18/2000
• Status: Expired due to Term

• Current Assignee: Leviton Manufacturing Company Incorporated
• Original Assignee: Leviton Manufacturing Company Incorporated
• Inventors: Curry, Cliff R., Redfield, John M.
• Primary Examiner(s): Abrams, Neil
• Assistant Examiner(s): DUVERNE, JEAN F
• Application Number:
  US09/642,114
• Time in Patent Office: 620 Days
• Field of Search: 439/676, 439/188, 439/638, 439/654, 439/521, 439/334, 439/135, 439/736, 439/941, 439/660, 439/76.1, 439/751, 174/32-34, 333/12.11, 333/5, 379/417
• US Class Current: 439/676
• CPC Class Codes: H01R 13/6464 by adding capacitive elements
• CPC Class Codes: H01R 13/719 specially adapted for high frequency, e.g. with filters
• 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 1/165 incorporating printed inductors
• CPC Class Codes: H05K 2201/10189 Non-printed connector
• CPC Class Codes: Y10S 439/941 Crosstalk suppression

Abstract

A compensating jack connector includes a printed circuit (PC) board with wire trace layers for reducing unwanted crosstalk originating in wire pairs including those found within a conventional communication plug coupled to the compensating jack connector. Some embodiments of the PC board of the compensating jack connector include layers having inter-digitated capacitance to form compensative capacitive coupling and multi-point compensative coupling and inductance to form inductive coupling to reduce the unwanted crosstalk. Pairs of wire traces are so oriented in some of the PC board layers to couple inductance between one pair of wire traces with inductance between another pair of wire traces to contribute in reduction of unwanted crosstalk. Some embodiments of multi-point compensative coupling position inter-digitated capacitance at different time delay distances from origination points of unwanted crosstalk and having different polarities to contribute in reduction of unwanted crosstalk. Other embodiments of the PC board have layers that include other capacitive coupling having a single time delay distance from a source of unwanted crosstalk. Further embodiments of the PC board of the compensating jack connector include layers having combinations of the inductive compensative coupling, multi-point compensative coupling, and the other capacitive coupling.

Claims

1. A compensating jack connector configured to be electrically coupled to a plug connector having plug connector elements, the plug connector configured to be electrically coupled to a first set of external conductors, the compensating jack connector configured to be electrically coupled to a second set of external conductors, the compensating jack connector comprising:

a body having a first body portion and a second body portion, the first body portion being configured to engage the compensating jack connector with the plug connector;

a plurality of contact members positioned toward the first body portion, the contact members configured to be electrically coupled with the plug connector elements when the compensating jack connector is engaged with the plug connector;

a plurality of wire connectors positioned toward the second body portion, the wire connectors configured to be electrically coupled to the second set of external conductors;

a structure with first and second surfaces; and

a plurality of internal conductors including first, second, third, and fourth conductors, at least part of the first and second conductors being adjacent the first surface, at least part of the third and fourth conductors being adjacent the second surface, each of the plurality of internal conductors being electrically coupled to one of the plurality of contact members, each of the plurality of internal conductors extending toward one of the plurality of wire connectors, each of the plurality of internal conductors being electrically coupled to one of the plurality of wire connectors, a first portion of the first conductor and a first portion of the second conductor being spaced apart from a first centerline, a first portion of the third conductor and a first portion of the fourth conductor being spaced apart from a second centerline, the first centerline and the second centerline being in alignment with one another whereby inductive coupling occurs when communication signals are applied to the first, second, third, and fourth conductors wherein inductive coupling between the first, second, third, and fourth conductors has an inductance value of at least 0.4 nanoHenries.

2. The compensating jack connector of claim 1 wherein the first portion of the first conductor and the first portion of the second conductor are spaced apart from the first centerline in parallel alignment.

3. The compensating jack connector of claim 1 wherein the first portion of the first conductor and the first portion of the second conductor are spaced apart from the first centerline a first distance and the first portion of the third conductor and the first portion of the fourth conductor are spaced apart from the second centerline a second distance.

4. The compensating jack connector of claim 3 wherein the first distance is equal to the second distance.

5. The compensating jack connector of claim 3 wherein the first distance is less than the second distance.

6. The compensating jack connector of claim 3 wherein the first distance varies.

7. The compensating jack connector of claim 1 wherein the first conductor is a tip conductor and the second conductor is a ring conductor.

8. The compensating jack connector of claim 7 wherein the third conductor is a tip conductor and the second conductor is a ring conductor.

9. The compensating jack connector of claim 1 wherein the first conductor is a tip conductor and the second conductor is a tip conductor.

10. The compensating jack connector of claim 9 wherein the third conductor is a ring tip conductor and the fourth conductor is a ring conductor.

11. The compensating jack connector of claim 1 wherein in a first area of the first surface and a first area of the second surface where the first centerline and the second centerline are in alignment with one another, the first conductor and the second conductor each extend toward one of the plurality of contact members and the third conductor and fourth conductor each extend toward one of the plurality of contact members.

12. The compensating jack connector of claim 1 wherein in a first area of the first surface and a first area of the second surface where the first centerline and the second centerline are in alignment with one another, the first conductor and the second conductor each extend toward one of the plurality of contact members and the third conductor and fourth conductor each extend toward one of the plurality of wire connectors.

13. The compensating jack connector of claim 1 wherein the first conductor and the second conductor are electrically coupled to the center pair of the second set of external conductors and the third conductor and the fourth conductor are electrically coupled to the split pair of the second set of external conductors.

14. The compensating jack connector of claim 1 wherein the first surface and the second surface are surfaces of a single dielectric material.

15. The compensating jack connector of claim 1 wherein the first body portion is configured to engaged with the plug connector as an RJ45 jack connector.

16. The compensating jack connector of claim 1 wherein the plurality of internal conductors further including additional internal conductors.

17. The compensating jack conductor of claim 1 wherein the first conductor has a first width, the second conductor has a second width, the third conductor has a third width, and the fourth conductor has a fourth width, and wherein the first conductor is spaced from the first centerline no more than twice the first width, the second conductor is spaced from the first centerline no more than twice the second width, the third conductor is spaced from the second centerline no more than twice the third width, and the fourth conductor is spaced from the second centerline no more than twice the fourth width.

18. The compensating jack conductor of claim 1 wherein the first conductor extends a first length between one of the plurality of wire connectors and one of the plurality of contact members, the second conductor extends a second length between one of the plurality of wire connectors and one of the plurality of contact members, the third conductor extends a third length between one of the plurality of wire connectors and one of the plurality of contact members, the fourth conductor extends a fourth length between one of the plurality of wire connectors and one of the plurality of contact members, and wherein the first portion of the first conductor is at least one tenth of the first length, the first portion of the second conductor is at least one tenth of the second length, the first portion of the third conductor is at least one tenth of the third length, and the first portion of the fourth conductor is at least one tenth of the fourth length.

19. The compensating jack connector of claim 1, further including inter-digitated capacitance electrically coupled between two of the contact members toward the first body portion and inter-digitated capacitance electrically coupled between two of the wire connectors toward the second body portion.

20. The compensating jack connector of claim 1, further including inter-digitated capacitance electrically coupled between two of the contact members toward the first body portion.

21. The compensating jack connector of claim 1 wherein the plurality of internal conductors are wire traces on a printed circuit board.

22. A compensating connector configured to electrically couple to a mating connector, the mating connector configured to be electrically coupled to a set of external conductors, the mating connector configured to pass communication signals and unwanted crosstalk signals to the electrically coupled compensating connector, the compensating connector comprising:

a body having a first body portion being configured to engage the compensating connector with the mating connector;

a plurality of internal conductors including first, second, third, and fourth conductors, a first portion of the first conductor and a first portion of the second conductor being spaced apart according to a first relation to produce a first magnetic field when the communication signals are passed from the mating connector to the compensating connector, a first portion of the third conductor and a first portion of a fourth conductor being spaced apart according to a second relation to from a second magnetic field when the communication signals are passed from the mating connector to the compensating connector, the first portions of the first and second conductors being positioned with respect to the first portions of the third and fourth conductors to couple the first and second magnetic fields to form a tailored inductive coupling, the tailored inductive coupling configured to reduce the unwanted crosstalk signals.

23. A compensating jack connector configured to electrically couple to a plug connector having plug connector elements, the plug connector configured to be electrically coupled to a first set of external conductors, the compensating jack connector configured to be electrically coupled to a second set of external conductors, the compensating jack connector comprising:

a body having first body portion and a second body portion, the first body portion being configured to engage the compensating jack connector with the plug connector;

a plurality of contact members positioned toward the first body portion, the contact members configured to electrically couple with the plug connector elements when the compensating jack connector is engaged with the plug connector;

a plurality of wire connectors positioned toward the second body portion, the wire connectors configured to electrically coupled to the second set of external conductors;

a structure with first and second surfaces; and

a plurality of internal conductors including first and second pairs of conductors, at least part of the first pair of conductors being adjacent the first surface, at least part of the second pair of conductors being adjacent the second surface, each of the plurality of internal conductors being electrically coupled to one of the plurality of contact members, each of the plurality of internal conductors extending toward one of the plurality of wire connectors, each of the plurality of internal conductors being electrically coupled to one of the plurality of wire connectors, a first portion of the first pair of conductors extending coextensively and a first portion of the second pair of conductors extending coextensively, the first portion of the first pair of conductors and the first portion of the second pair of conductors being positioned in opposing relation to induce induction to compensate for cross-talk originating outside of the compensating connector.

24. In a communication connector, a method of adding compensative inductive coupling, the method comprising:

extending a first conductor from a first area of the communication connector to a second area of the communication connector;

extending a second conductor from the first area of the communication connector to the second area of the communication connector to so position a first portion of the second conductor with respect to a first portion of the first conductor to produce a first magnetic field when the first and second conductors carry a communication signal;

extending a third conductor from the first area of the communication connector to the second area of the communication connector;

extending a fourth conductor from the first area of the communication connector to the second area of the communication connector to so position a first portion of the fourth conductor with respect to a first portion of the third conductor to produce a second magnetic field when the third and fourth conductors carry a communication signal;

positioning the first portions of the first and second conductors with respect to the first portions of the third and fourth conductors to couple the first and second magnetic fields to produce an inductive coupling to contribute in reducing unwanted cross-talk originating outside the communication connector.

25. A compensating jack connector configured to electrically couple to a plug connector having plug connector elements, the plug connector configured to be electrically coupled to a first set of external conductors, the compensating jack connector configured to be electrically coupled to a second set of external conductors, the compensating jack connector comprising:

a body having first body portion and a second body portion, the first body portion being configured to engage the compensating jack connector with the plug connector;

a plurality of contact members positioned toward the first body portion, the contact members configured to electrically couple with the plug connector elements when the compensating jack connector is engaged with the plug connector;

a plurality of wire connectors positioned toward the second body portion, the wire connectors configured to electrically coupled to the second set of external conductors;

a structure with first and second surfaces; and

a plurality of internal conductors including first and second pairs of conductors, at least part of the first pair of conductors being adjacent the first surface, at least part of the second pair of conductors being adjacent the second surface, each of the plurality of internal conductors being electrically coupled to one of the plurality of contact members, each of the plurality of internal conductors extending toward one of the plurality of wire connectors, each of the plurality of internal conductors being electrically coupled to one of the plurality of wire connectors, a first portion of the first pair of conductors extending coextensively for a first length and a first portion of the second pair of conductors extending coextensively for a second length, the first portion of the first pair of conductors and the first portion of the second pair of conductors being positioned in opposing relation for a third length, the third length being at least 50% of the first length and at least 50% of the second length.