Cable assembly for an information handling system
View Patent ↗A cable assembly includes a printed circuit board having a first surface and a second surface. A first post and a second post extend from one side of the printed circuit board. A first signal pad, a second signal pad, and a first ground pad are each coupled to the first surface. A first cable has a first signal wire at least partially covered by a first insulator and a second signal wire at least partially covered by a second insulator. The first cable further has a first ground shield at least partially covering the first and second insulators. A first end of a first cable is mounted between the first and second posts. A conductive attachment couples the first ground shield to the first ground pad.
1. An information handling system having a cable assembly, the information handling system comprising:
a printed circuit board having a first surface and a second surface opposed to the first surface;
a first post and a second post extending from one side of the printed circuit board (PCB) to define a slot within the one side of the PCB;
a first signal line that terminates into a first signal pad, a second signal line that terminates into a second signal pad, and two ground lines, each terminating into a respective one of a first ground pad and a second ground pad that extends onto a respective one of the first post and the second post, each of the first signal line, second signal line, and two ground lines coupled to the first surface;
a first cable having a first signal wire at least partially covered by a first insulator, a second signal wire at least partially covered by a second insulator, and a first ground shield extending around an exterior of and at least partially covering the first and second insulators, a first end of the first cable mounted in the slot between the first and second posts;
an outer insulator that partially covers the ground shield; and
a first conductive attachment coupling the first signal wire to the first signal pad, a second conductive attachment coupling the second signal wire to the second signal pad, and a third conductive attachment coupling the first ground shield to the first ground pad.
2. The information handling system of claim 1 , further comprising:
a fourth conductive attachment coupling the first ground shield to the second ground pad.
3. The information handling system of claim 2 , wherein the third conductive attachment and the fourth conductive attachment are located on opposed sides of the cable.
4. The information handling system of claim 1 , wherein the first and second posts define a first slot there between, the first end of the first cable mounted in the first slot.
5. The information handling system of claim 4 , wherein the first slot is dimensioned to receive the first end of the cable such that the first ground shield is located adjacent to the first ground pad and a second ground pad.
6. The information handling system of claim 1 , further comprising:
at least one ground via extending from the first surface of each of the first ground pad and the second ground pad through the respective one of the first post and the second post to the second surface, the at least one ground connected to an upper ground plane and a lower ground plane within the printed circuit board, wherein the ground vias electrically connect the first and second ground pad and upper and lower ground planes to ground.
7. The information handling system of claim 6 , further comprising:
a third signal pad, a fourth signal pad, and a third ground pad, each coupled to the second surface;
a second cable having a third signal wire at least partially covered by a third insulator, a fourth signal wire at least partially covered by a fourth insulator and a second ground shield at least partially covering the third and fourth insulators; and
the third signal wire coupled to the third signal pad, the fourth signal wire coupled to the fourth signal pad and the second ground shield coupled to the third ground pad via a third conductive attachment.
8. The information handling system of claim 7 , wherein the second cable is mounted opposed to and below the first cable.
9. A cable assembly comprising:
a printed circuit board having a first surface and a second surface opposed to the first surface;
a first post and a second post extending from one side of the printed circuit board (PCB) to define a slot within the one side of the PCB;
a first signal line that terminates into a first signal pad, a second signal line that terminates into a second signal pad, and two ground lines, each terminating into a respective one of a first ground pad and a second ground pad that extends onto a respective one of the first post and the second post, each of the first signal line, second signal line, and two ground lines coupled to the first surface;
a first cable having a first signal wire at least partially covered by a first insulator, a second signal wire at least partially covered by a second insulator, and a first ground shield extending around an exterior of and at least partially covering the first and second insulators, a first end of the first cable mounted in the slot between the first and second posts;
an outer insulator that partially covers the ground shield; and
a first conductive attachment coupling the first signal wire to the first signal pad, a second conductive attachment coupling the second signal wire to the second signal pad, and a third conductive attachment coupling the first ground shield to the first ground pad.
10. The cable assembly of claim 9 , further comprising:
a fourth conductive attachment coupling the first ground shield to the ground pad.
11. The cable assembly of claim 10 , wherein the first conductive attachment and the second conductive attachment are located on opposed sides of the cable.
12. The cable assembly of claim 9 , wherein the first and second posts define a first slot there between, the first end of the first cable mounted in the first slot.
13. The cable assembly of claim 12 , wherein the first slot is dimensioned to receive the first end of the cable such that the first ground shield is located adjacent to the first ground pad and a second ground pad.
14. The cable assembly of claim 9 , further comprising:
at least one ground via extending from the first surface of each of the first ground pad and the second ground pad through the respective one of the first post and the second post to the second surface, the at least one ground connected to an upper ground plane and a lower ground plane within the printed circuit board, wherein the ground vias electrically connect the first and second ground pad and upper and lower ground planes to ground.
15. The cable assembly of claim 9 , further comprising:
a third signal pad coupled to the second surface;
a fourth signal pad coupled to the second surface;
a third ground pad coupled to the second surface;
a second cable having a third signal wire at least partially covered by a third insulator, a fourth signal wire at least partially covered by a fourth insulator and a second ground shield at least partially covering the third and fourth insulators; and
the third signal wire coupled to the third signal pad, the fourth signal wire coupled to the fourth signal pad and the second ground shield coupled to the third ground pad via a third conductive attachment.
16. The cable assembly of claim 15 , wherein the second cable is mounted opposed to adjacent to and below the first cable.
17. The cable assembly of claim 9 , wherein a space created between the first and second insulators defines a cavity that is air filled.
18. The cable assembly of claim 9 , wherein the ground shield serves as an electromagnetic interference shield and as a common mode return path.