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US 2006/0124342 A1Published application
Skew adjusted data cable
AssigneeBelden Technologies, Inc.
InventorWilliam Clark
Life of this patent
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Abstract
A twisted pair cable wherein characteristics of the twisted pairs, such as twist lay, insulation thickness, characteristic impedance, etc. are selected so as to achieve minimal skew between the twisted pairs. In some examples, insulation materials may be varied among the twisted pairs and composite insulations may be used for one or more pairs in a cable.
Claims2
A cable comprising:
- a first twisted pair of conductors surrounded by a first insulation material having a first dielectric constant, the first twisted pair of conductors having a first signal phase delay;
- and
- a second twisted pair of conductors insulated by a second insulation material having a second dielectric constant greater than the first dielectric constant, the second twisted pair of conductors having a second signal phase delay substantially equal to the first signal phase delay such that a skew of the cable is less than approximately 7 nanoseconds per 100 meters;
- wherein the first twisted pair of conductors has a first twist lay and the second twisted pair of conductors has a second twist lay greater than the first twist lay;
- and
- wherein the second insulation material comprises a first layer having a third dielectric constant and a second layer having a fourth dielectric constant such that the second dielectric constant is an effective dielectric constant of a combination the first and second layers.
3 more elements
A cable comprising:
- a first twisted pair of conductors insulated by a first insulation material having a first dielectric constant, the first twisted pair of conductors having a first signal phase delay;
- and
- a second twisted pair of conductors insulated by a second insulation material having a second dielectric constant greater than the first dielectric constant, the second twisted pair of conductors having a second signal phase delay substantially equal to the first signal phase delay such that a skew of the cable is less than approximately 7 nanoseconds per 100 meters;
- wherein the first twisted pair of conductors has a first twist lay and the second twisted pair of conductors has a second twist lay greater than the first twist lay;
- and
- wherein the first insulation is a composite formed of at least two different materials.
3 more elements
Dependencies are inferred from the claim text.