Electrical connectors and circuit boards having non-ohmic plates

• US 7,658,651 B2
• Filed: 04/25/2008
• Issued: 02/09/2010
• Est. Priority Date: 04/25/2008
• Status: Active Grant

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: Tyco Electronics Corporation (TE Connectivity Ltd. (United Kingdom))
• Inventors: Pepe, Paul John, Muir, Sheldon Easton, Bopp, Steven Richard, Tobey, Shawn Phillip
• Primary Examiner(s): TA, THO DAC
• Application Number:
  US12/109,544
• Publication Number:
  US 20090269978A1
• Time in Patent Office: 655 Days
• Field of Search: 439/676, 439/620.22, 439/941, 174/261, 361/777
• US Class Current: 439/676
• CPC Class Codes: H01R 13/6464 by adding capacitive elements
• 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 13/6658 on printed circuit board H01R13/6666 - H01R13/6691 take precedence
• CPC Class Codes: H01R 13/719 specially adapted for high frequency, e.g. with filters
• 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 1/0237 High frequency adaptations H05K1/0216 takes precedence
• CPC Class Codes: H05K 1/0239 Signal transmission by AC coupling
• CPC Class Codes: H05K 1/162 incorporating printed capacitors
• CPC Class Codes: H05K 2201/09236 Parallel layout layout of balanced signal pairs H05K1/0245; superposed layout H05K2201/09672
• 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

An electrical connector includes a housing and a plurality of contacts within the housing that are configured to engage with mating contacts of a mating connector. The contacts form at least a first differential pair and a second differential pair. The electrical connector also includes a circuit board housed within the housing. The circuit board has a substrate body formed from a dielectric material and includes a first trace electrically coupled to a contact of the first differential pair and a second trace electrically coupled to a contact of the second differential pair. At least one of the first and second traces is an open-ended trace. The circuit board also has a non-ohmic plate that is positioned adjacent to the traces. The plate is positioned to electromagnetically couple the first and second traces to each other and the non-ohmic plate and traces are configured for a desired electrical performance.

Claims

1. An electrical connector comprising:

a housing;

a plurality of contacts within the housing configured to engage with mating contacts of a mating connector, the contacts forming at least a first differential pair and a second differential pair; and

a circuit board housed within the housing, the circuit board comprising;

a substrate body formed from a dielectric material and including a first trace electrically coupled to a contact of the first differential pair and a second trace electrically coupled to a contact of the second differential pair, wherein at least one of the first and second traces is an open-ended trace; and

a non-ohmic plate positioned adjacent to the traces, wherein the plate is positioned to electromagnetically couple the first and second traces to each other and the non-ohmic plate and traces are configured for a desired electrical performance.

2. An electrical connector in accordance with claim 1 wherein the non-ohmic plate is positioned within the substrate body.

3. An electrical connector in accordance with claim 1 wherein the non-ohmic plate has a plate surface and the first and second traces each have a trace surface, the non-ohmic plate positioned within the substrate body such that the plate surface faces and extends parallel to the trace surfaces.

4. An electrical connector in accordance with claim 1 wherein the non-ohmic plate has a plate length and a plate width and the first and second traces have substantially equal trace widths and are separated by a predetermined distance, wherein the plate length extends parallel to the first and second traces in a common direction and the plate width is substantially equal to two times the trace width plus the predetermined distance.

5. An electrical connector in accordance with claim 1 wherein the first and second traces each have an outer edge surface extending lengthwise along the substrate body and the non-ohmic plate has two opposing outer edge surfaces extending lengthwise within the substrate body, wherein at least one of the outer edge surfaces of the first and second traces is substantially aligned with at least one of the outer edge surfaces of the non-ohmic plate.

6. An electrical connector in accordance with claim 1 wherein the non-ohmic plate is positioned to capacitatively couple and magnetically couple the first and second traces to each other.

7. An electrical connector in accordance with claim 1 further comprising a contact sub-assembly, the sub-assembly being received within the housing and including the plurality of contacts and the circuit board.

8. An electrical connector in accordance with claim 1 further comprising a third trace electrically coupled to a contact of a third differential pair, the third trace being one of an open-ended trace and a contact trace, wherein the non-ohmic plate is positioned to electromagnetically couple the first, second, and third traces to each other and the non-ohmic plate and the traces are configured for a desired electrical performance.

9. An electrical connector in accordance with claim 1 wherein the second trace is an open-ended trace.

10. An electrical connector in accordance with claim 1 wherein the second trace is a contact trace.

11. A circuit board configured to be electrically connected to a plurality of contacts forming a plurality of differential pairs, the circuit board comprising:

a substrate body formed from a dielectric material and including a first trace electrically coupled to a contact of a first differential pair and a second trace electrically coupled to a contact of a second differential pair, wherein at least one of the first and second traces is an open-ended trace; and

a non-ohmic plate positioned adjacent to the traces, wherein the non-ohmic plate is positioned to electromagnetically couple the first and second traces to each other and the non-ohmic plate and traces are configured for a desired electrical performance.

12. A circuit board in accordance with claim 11 wherein the non-ohmic plate is positioned within the substrate body.

13. A circuit board in accordance with claim 11 wherein the non-ohmic plate has a plate surface and the first and second traces each have a trace surface, the non-ohmic plate positioned within the substrate body such that the plate surface faces and extends parallel to the trace surfaces.

14. A circuit board in accordance with claim 11 wherein the non-ohmic plate has a plate length and a plate width and the first and second traces have substantially equal trace widths and are separated by a predetermined distance, wherein the plate length extends parallel to the first and second traces in a common direction and the plate width is substantially equal to two times the trace width plus the predetermined distance.

15. A circuit board in accordance with claim 11 wherein the first and second traces each have an outer edge surface extending lengthwise along the substrate body and the non-ohmic plate has two opposing outer edge surfaces extending lengthwise within the substrate body, wherein at least one of the outer edge surfaces of the first and second traces is substantially aligned with at least one of the outer edge surfaces of the non-ohmic plate.

16. A circuit board in accordance with claim 15 wherein the non-ohmic plate includes a terminal edge surface extending widthwise within the substrate body and each of the first and second traces includes a terminal edge surface, wherein both of the outer edge surfaces of the non-ohmic plate are substantially aligned with the outer edge surfaces of the first and second traces and the terminal edge surface of the non-ohmic plate is substantially aligned with the terminal edge surfaces of the first and second traces.

17. A circuit board in accordance with claim 11 wherein the non-ohmic plate is positioned to capacitatively couple and magnetically couple the first and second traces to each other.

18. A circuit board in accordance with claim 11 further comprising a third trace electrically coupled to a contact of a third differential pair, the third trace being one of an open-ended trace and a contact trace, wherein the non-ohmic plate is positioned to electromagnetically couple the first, second, and third traces to each other and the non-ohmic plate and the traces are configured for a desired electrical performance.

19. A circuit board in accordance with claim 11 wherein the second trace is an open-ended trace.

20. A circuit board in accordance with claim 11 wherein the second trace is a contact trace.