Communications jack with printed wiring board having paired coupling conductors
A communications jack includes: a jack frame having a plug aperture; a plurality of contact wires, the contact wires having free ends that extend into the plug aperture, the free ends of the contact wires being arranged serially in side-by-side relationship; a plurality of electrical terminals, the terminals being arranged in pairs, each pair defining a communication channel; a dielectric mounting substrate, the mounting substrate including a plurality of mounting locations for contact wires and a plurality of mounting locations for the electrical terminals; and a plurality of conductors mounted on the substrate, each of the conductors extending, defining a path, and establishing electrical connection between a contact wire mounting location and an electrical terminal mounting location. First and second of the conductors that are connected to one of the pairs of terminals each include a coupling section, the coupling sections being immediately adjacent to each other and having identical instantaneous current direction such that the sections couple and cause a localized increase in inductance.
1. A communications connector, comprising:
a first conductive path electrically connecting a first input of the connector and a first output of the connector;
a second conductive path electrically connecting a second input of the connector and a second output of the connector, wherein the first and second conductive paths comprise a first differential pair of conductive paths for transmitting a first information signal;
a third conductive path electrically connecting a third input of the connector and a third output of the connector; and
a fourth conductive path electrically connecting a fourth input of the connector and a fourth output of the connector, wherein the third and fourth conductive paths comprise a second differential pair of conductive paths for transmitting a second information signal,
wherein a first section of the first conductive path is immediately adjacent to a first section of the second conductive path that has the same instantaneous current direction as the first section of the first conductive path, and
wherein a first section of the third conductive path is immediately adjacent to a first section of the fourth conductive path that has the same instantaneous current direction as the first section of the third conductive path.
2. The connector defined in claim 1 wherein the first section of the first conductive path and the first section of the second conductive path are arranged with respect to each other so as to cause a localized increase in inductance in order to cause an increase in return loss of at least about 3 dB above 100 MHz.
3. The connector defined in claim 2 , wherein the localized increase in inductance is between about 2 to about 8 nanohenries.
4. The connector defined in claim 2 , wherein the localized increase in inductance is selected to provide an input impedance of approximately 100 ohms on the first differential pair of conductive paths.
5. The connector defined in claim 2 , wherein an amount of the localized increase in inductance is selected based at least in part on the amount of improvement the localized increase in inductance provides in the return loss associated with the first differential pair of conductive paths.
6. The connector defined in claim 1 , wherein the first input and the second input are directly adjacent to each other.
7. The connector defined in claim 6 , wherein the first input and the second input are between the third input and the fourth input.
8. The connector defined in claim 7 , the connector further comprising a wiring board having a dielectric mounting substrate, wherein the first section of the first conductive path comprises a first conductive trace on the dielectric mounting substrate and wherein the first section of the second conductive path comprises a second conductive trace on the dielectric mounting substrate.
9. The connector defined in claim 7 , wherein the first section of the first conductive path and the first section of the second conductive path travel immediately adjacent to each other for about 0.05 to about 0.20 inches.
10. The connector defined in claim 9 , the connector further comprising a dielectric mounting substrate having first and second contact wire mounting locations and first and second output terminal mounting locations, wherein the first conductive path comprises one or more first conductive traces on the dielectric mounting substrate electrically connecting the first contact wire mounting location to the first output terminal mounting location, and wherein the second conductive path comprises one or more second conductive traces on the dielectric mounting substrate electrically connecting the second contact wire mounting location to the second output terminal mounting location.
11. The connector defined in claim 9 , wherein a gap between the first section of the first conductive path and the first section of the second conductive path is between about 8 and about 15 mils.
12. The connector defined in claim 11 , wherein the first section of the first conductive path and the first section of the second conductive path are substantially parallel to each other.
13. The connector defined in claim 11 , wherein the first section of the first conductive path and the first section of the second conductive path are adjacent at least one of the first output or the second output.
14. A method of increasing localized inductance in a conductor of a communications connector, the connector comprising a plurality of conductors, the conductors being electrically connected with electrical terminals that are arranged in pairs, the method comprising
coupling sections of two of the conductors that are electrically connected with a pair of electrical terminals, the coupling sections comprise a differential pair and the coupling sections being immediately adjacent to each other and having the same instantaneous current direction; and
selecting the portions of the two conductors that travel immediately adjacent to each other in order to provide a pre-selected improvement in a return loss of the two conductors.
15. The method of claim 14 , further comprising coupling sections of another two of the conductors that are electrically connected with another pair of electrical terminals, the coupling sections of the another two of the conductors being immediately adjacent to each other and having the same instantaneous current direction.
16. A method of improving the return loss performance of a communications connector, the connector comprising at least first and second conductive paths that together comprise at least part of a first differential communication channel and third and fourth conductive paths that together comprise at least part of a second differential communication channel, the method comprising:
locating a section of the first conductive path immediately adjacent a section of the second conductive path, wherein the sections of the first and second conductive paths have the same instantaneous current direction; and
locating a section of the third conductive path immediately adjacent a section of the fourth conductive path, wherein the sections of the third and fourth conductive paths have the same instantaneous current direction.
17. A communications connector, comprising:
a plurality of contact wires:
a plurality of electrical terminals, the terminals being arranged in pairs, each pair defining a communication channel;
a dielectric mounting substrate, the mounting substrate including a plurality of mounting locations for respective ones of the contact wires and a plurality of mounting locations for respective ones of the electrical terminals;
a plurality of conductors mounted on the dielectric mounting substrate, each of the conductors establishing electrical connection between a contact wire mounting location and an electrical terminal mounting location;
wherein first and second of the conductors that comprise a first differential pair of conductors and that are electrically connected to a first of the pairs of electrical terminals each includes a coupling section, the coupling sections being immediately adjacent to each other and having identical instantaneous current direction in order to cause an increase in return loss of at least about 3 dB above 100 MHz on the first differential pair of conductors;
wherein third and fourth of the conductors that comprise a second differential pair of conductors and that are electrically connected to a second of the pairs of electrical terminals each includes a coupling section, the coupling sections being immediately adjacent to each other and having identical instantaneous current direction in order to cause an increase in return loss of at least about 3 dB above 100 MHz on the second differential pair of conductors.
18. The connector defined in claim 17 , wherein the coupling sections of the first and second of the conductors are arranged to cause a localized increase in inductance that is selected based at least in part on the amount of improvement the localized increase in inductance provides in the return loss on the first differential pair of conductors.
19. The connector defined in claim 18 , wherein the localized increase in inductance is between about 2 to about 8 nanohenries.
20. The connector defined in claim 18 , wherein the localized increase in inductance is selected to provide an input impedance of approximately 100 ohms on the first differential pair of conductors.
21. The connector defined in claim 18 , wherein the coupling sections travel immediately adjacent to each other for about 0.05 to about 0.20 inches.
22. The connector defined in claim 18 , wherein a gap between the coupling sections of the first and second of the conductors path is between about 8 and about 15 mils.
23. A communications connector, comprising:
a dielectric mounting substrate that includes first and second contact wire mounting locations and first and second electrical terminal mounting locations;
a first contact wire mounted in the first contact wire mounting location and a second contact wire mounted in the second contact wire mounting location;
a first electrical terminal and a second electrical terminal that define a first differential pair;
a first conductive path electrically connecting the first contact wire mounting location to the first electrical terminal mounting location;
a second conductive path electrically connecting the second contact wire mounting location to the second electrical terminal mounting location;
wherein the second electrical terminal mounting location is completely encircled by a closed loop that is defined by at least part of the first conductive path and a straight line that extends between the first contact wire mounting location and the first electrical terminal mounting location; and
wherein a first segment of the first conductive path and a first segment of the second conductive path are immediately adjacent to each other and have the same instantaneous current direction.
24. The connector of claim 16 , wherein the first segments of the first and second conductive paths are arranged with respect to each other to provide a pre-selected improvement in the return loss of the first differential pair.