Lossy Drain Wire on a High Speed Cable
AssigneeDell Products L.P.
InventorsSandor Farkas, Stuart Allen Berke, Bhyrav M. Mutnury
Life of this patent
Estimating the term…
Abstract
A dual axial cable includes first and second signal conductors, a shield, and a drain wire. The first and second signal conductors transmit a differential signal. The shield is spirally wrapped around the first and second conductors, and causes a resonant characteristic of the dual axial cable. The drain wire provides a return path for the differential signal in the dual axial cable. The drain wire is roughened to a specific amount of roughness, which reduces signal loss at resonant frequencies of the resonant characteristic caused by the shield.
Claims20
A dual axial cable comprising:
- first and second signal conductors to transmit a differential signal;
- a shield spirally wrapped around the first and second conductors, wherein the shield causes a resonant characteristic of the dual axial cable;
- and
- a drain wire to provide a return path for the differential signal, the drain wire being roughened to a specific amount of roughness, wherein the specific amount of roughness causes a reduction of a signal loss at resonant frequencies of the resonant characteristic caused by the shield.
A dual axial cable comprising:
- first and second signal conductors to transmit a differential signal;
- a shield spirally wrapped around the first and second conductors, wherein the shield causes a resonant characteristic of the dual axial cable;
- a first drain wire to provide a first return path for the differential signal;
- and
- a second drain wire to provide a second return path for the differential signal, the first and second drain wires being roughened to a specific amount of roughness, wherein the specific amount of roughness causes a reduction of a signal loss at resonant frequencies of the resonant characteristic caused by the shield.
A method comprising:
- determining a desired dampening of signal loss at resonant frequencies of a dual axial cable;
- roughening a drain wire in the dual axial cable to a roughness derived based on the desired dampening of the signal loss at the resonant frequencies;
- and
- spirally wrapping the drain wire and first and second conductors with a shield, wherein spirally wrapping of the shield high cause signal loss at resonant frequencies unless dampened by a roughened drain wire.
Dependencies are inferred from the claim text.