High speed transmission cable
The present invention relates to a high speed transmission cable that includes a first conductor set, a dielectric film at least partially concentrically disposed around the first conductor set and a pinched portion forming an insulating envelope around the first conductor set. The dielectric film includes a base layer having a plurality of first protrusions formed on a first major surface of the base layer, wherein the dielectric film is disposed such that the base layer is partially concentric with the conductor set and wherein a portion of the first protrusions is disposed between the first conductor set and the base layer in a region where the base layer is concentric with the first conductor set.
1. A high speed transmission cable comprising
a conductor set comprising two parallel uninsulated conductors extending along a length of the cable; and
first and second dielectric films disposed on opposite sides of the cable and comprising concentric portions partially concentric with the conductor set and pinched portions on each side of the conductor set, the pinched portions of the first and second dielectric films bonded to one another on each side of the conductor set, each dielectric film comprising:
a base layer; and
a plurality of shorter protrusions and a taller protrusion disposed on a major surface of the base layer only in the concentric portion of the dielectric film between the pinched portions of the dielectric film, the shorter protrusions disposed between the conductor set and the base layer so that at least some of the shorter protrusions contact the two uninsulated conductors,
wherein the taller protrusions of the first and second dielectric films are disposed between and separate the two uninsulated conductors and are bonded to, or interlocked with, each other.
2. The transmission cable of claim 1 , wherein the taller protrusions of the first and second dielectric films are bonded to each other.
3. The transmission cable of claim 1 , wherein the taller protrusions of the first and second dielectric films are interlocked with each other.