Electrical connector and an associated method for compensating for crosstalk between a plurality of conductors

• US 5,586,914 A
• Filed: 05/19/1995
• Issued: 12/24/1996
• Est. Priority Date: 05/19/1995
• Status: Expired due to Term

• Current Assignee: Commscope Emea Limited (CommScope Holding Company, Inc.)
• Original Assignee: The Whitaker Corporation (Meggitt PLC)
• Inventors: Foster, deceased, George H. Jr., Metzger, Donald L.
• Primary Examiner(s): Garbe, Stephen P.
• Application Number:
  US08/444,501
• Time in Patent Office: 585 Days
• Field of Search: 29/749, 29/883, 29/884, 29/827, 439/676, 439/404, 439/941
• US Class Current: 439/676
• CPC Class Codes: H01R 13/6467 by cross-over of signal conductors
• CPC Class Codes: H01R 13/6474 by variation of conductive properties, e.g. by dimension variations
• CPC Class Codes: H01R 24/64 for high frequency, e.g. RJ 45
• CPC Class Codes: Y10S 439/941 Crosstalk suppression
• CPC Class Codes: Y10T 29/49121 Beam lead frame or beam lead device
• CPC Class Codes: Y10T 29/4922 with molding of insulation
• CPC Class Codes: Y10T 29/49222 forming array of contacts or terminals

Abstract

An electrical connector which provides compensation for crosstalk includes a number of conductors positioned at least partially within an internal cavity defined by a housing. The elongate conductors are generally substantially parallel and laterally spaced and include a resilient contact portion at a first end and an insulation displacement contact portion at a second end. The elongate conductors include a pair conductors, at least a portion of which are positioned in an overlapping, vertically spaced relationship. The portions of the pair of conductors which overlap are generally wider than the substantially parallel, laterally spaced portions of the conductors so as to thereby define respective compensating segments. The length of the compensating segments as well as the width of the portion of the compensating segments which overlap can be selected to establish capacitive coupling between the compensating segments so as to thereby compensate for crosstalk between the conductors.

Claims

1. An electrical connector comprising:

a housing defining a cavity which opens through a front surface of said housing, said housing comprising a rear surface, opposite the front surface, defining a plurality of apertures extending therethrough; and

a plurality of elongate conductors positioned at least partially within the cavity defined within said housing, each of said conductors having a resilient contact portion at a first end and an insulation displacement contact portion at a second end, opposite the first end, extending through an aperture defined in the rear surface of said housing, each of said conductors having a respective substantially constant width, wherein said plurality of conductors include first and second elongate conductors which extend in a substantially parallel, laterally spaced relationship from their respective first ends to a predetermined crossover location where the first and second conductors laterally cross without establishing electrical contact therebetween, and wherein each conductor of a laterally spaced-apart pair of said conductors has a respective portion which is wider than its said substantially constant width, and said wider portions are positioned in an overlapping, vertically spaced relationship at a predetermined location spaced apart from the crossover location to compensate for crosstalk between said plurality of conductors.

2. An electrical connector according to claim 1 wherein said plurality of elongate conductors extend in a substantially parallel, laterally spaced relationship from their respective first ends to respective crossover locations where each conductor crosses an adjacent conductor without establishing electrical contact therebetween.

3. An electrical connector according to claim 2 wherein distances defined by each of said conductors between their respective said crossover locating and their respective first and second ends, respectively, are equal.

4. An electrical connector according to claim 2 wherein first and second pairs of said laterally spaced-apart conductors have said wider portions which are positioned in respective overlapping, vertically spaced relationships at predetermined locations between the crossover location and the second ends of their respective conductors, and wherein said first and second pairs of said conductors are the laterally innermost conductors.

5. An electrical connector according to claim 1 wherein portions of said first and second conductors are coated with an insulating coating at the predetermined crossover location.

6. An electrical connector according to claim 1 wherein said wider portions are coated with an insulating coating to thereby minimize a required vertical spacing therebetween.

7. An electrical connector according to claim 1 wherein the respective first ends of said plurality of conductors are arranged in a first predetermined order, and wherein at least one of said plurality of conductors laterally crosses another of said plurality of conductors at a location between the crossover location and the second end of said at least one conductor such that the respective second ends of said plurality of conductors are arranged in a second predetermined order.

8. An electrical connector according to claim 1 wherein said housing further comprises a plurality of outwardly projecting silos extending rearwardly from the rear surface wherein said plurality of silos are positioned to project outwardly from portions of the rear surface between the plurality of apertures defined therein, and wherein said insulation displacement contact portion of each of said plurality of conductors, which extends through a respective aperture defined in the rear surface of said housing and between a pair of adjacent said silos, includes a pair of opposed blade portions defining an insulation displacement slot therebetween such that a wire can be inserted into the insulation displacement slot by application of a forwardly directed force to the wire.

9. An electrical connector according to claim 8 wherein the plurality of apertures defined in said housing are arranged in two laterally extending spaced-apart rows.

10. An electrical connector comprising a plurality of elongate conductors each having a respective predetermined width, wherein each conductor has a resilient contact portion at a first end and an insulation displacement contact portion at a second end, opposite the first end, wherein said conductors are associated in pairs and said conductors extend in a substantially parallel, laterally spaced relationship from their respective first ends to a predetermined crossover location where one conductor of each said pair laterally crosses the other conductor of each said pair without establishing electrical contact therebetween, and wherein each said pair includes first and second conductors having respective compensating segments each having a respective width, which is greater than its said predetermined width the compensating segments of each said pair being overlapped in a vertically spaced relationship at a predetermined location spaced apart from the crossover location to compensate for crosstalk between said plurality of conductors.

11. An electrical connector according to claim 10 wherein distances defined by each of said conductors between their respective said crossover locations and their respective first and second ends, respectively, are equal.

12. An electrical connector according to claim 10 wherein portions of said first and second conductors are coated with an insulating coating at the predetermined crossover location.

13. An electrical connector according to claim 10 wherein said wider portions are coated with an insulating coating to thereby minimize a required vertical spacing therebetween.

14. An electrical connector according to claim 10 wherein the respective first ends of said plurality of conductors are arranged in a first predetermined order, and wherein at least one of said plurality of conductors laterally crosses another of said plurality of conductors at a location between the crossover location and the second end of said at least one conductor such that the respective second ends of said plurality of conductors are arranged in a second predetermined order.

15. A lead frame comprising:

a plurality of lead frames wherein each lead frame includes at least one elongate conductor extending from a first end connected to a first side of said lead frame to a second end connected to a second side of said lead frame, opposite the first side, and wherein each said elongate conductor has a respective substantially constant width and includes a resilient contact portion at the first end and an insulation displacement contact portion at the second end; and

alignment means for aligning said plurality of lead frames such that the conductors of said plurality of lead frames include first and second elongate conductors which extend in a substantially parallel, laterally spaced relationship from the respective first ends to a predetermined crossover location where the first and second conductors laterally cross without establishing electrical contact therebetween, and such that each conductor of a laterally spaced-apart pair of the conductors has a respective portion which is wider than its said substantially constant width, and said wider portions are positioned in an overlapping, vertically spaced relationship at a predetermined location spaced apart from the crossover location to compensate for crosstalk between the conductors.

16. A lead frame assembly according to claim 15 wherein distances defined by each of the conductors of said plurality of lead frames between their respective said crossover locations and their respective first and second ends, respectively, are equal.

17. A lead frame assembly according to claim 15 wherein said alignment means aligns said plurality of lead frames such that the elongate conductors extend in a substantially parallel, laterally spaced relationship from their respective first ends to respective crossover locations where each conductor crosses an adjacent conductor without establishing electrical contact therebetween.

18. A lead frame assembly according to claim 15 wherein each of said plurality of lead frames is coated with an insulating coating.

19. A lead frame assembly according to claim 15 wherein the respective first ends of the conductors or said plurality of lead frames are arranged in a first predetermined order, and wherein at least one of the conductors laterally crosses another of the conductors at a location between the crossover location and the second end of the at least one conductor such that the respective second ends of the conductors are arranged in a second predetermined order.

20. A method of compensating for crosstalk between a plurality of conductors wherein each conductor has a respective substantially constant width, a resilient contact portion at a first end and an insulation displacement contact portion at a second end, opposite the first end, the method comprising the steps of:

extending the plurality of conductors in a substantially parallel, laterally spaced relationship form their respective first ends to a predetermined crossover location;

laterally crossing each said conductor with an adjacent said conductor without establishing electrical contact therebetween;

providing each conductor of a laterally spaced-apart pair of said conductors with a portion which is wider than its said substantially constant width; and

overlapping said wider portions in a vertically spaced relationship at a predetermined location spaced apart from the crossover location to thereby compensate for crosstalk between the plurality of conductors.

21. A method according to claim 20 wherein said overlapping step comprises the step of capacitively coupling the vertically spaced wider portions of the pair of conductors.

22. A method according to claim 20 wherein the respective first ends of the plurality of conductors are arranged in a first predetermined order, the method further comprising the step of laterally crossing at least one of the plurality of conductors with another of the plurality of conductors at a location between the crossover location and the second end of the at least one conductor such that the respective second ends of the plurality of conductors are arranged in a second predetermined order.

23. A method according to claim 20 further comprising the steps of:

positioning the plurality of elongate conductors at least partially within a cavity defined within a housing and opening through a front surface of the housing, the housing including a rear surface, opposite the front surface, defining a plurality of apertures extending into the cavity defined therein, the housing also including a plurality of outwardly projecting silos extending rearwardly from the rear surface wherein the plurality of silos are positioned to project outwardly from portions of the rear surface between the plurality of apertures defined therein;

extending the insulation displacement contact portions of each of the plurality of conductors through a respective said aperture defined in the rear surface of the housing and between a pair of adjacent silos, wherein each said insulation displacement contact portion includes a pair of opposed blade poritons defining an insulation displacement slot therebetween; and

inserting a wire into the insulation displacement slot by applying a force the wire that is directed forwardly from the rear surface of the housing to the front surface of the housing.