High speed data cable having individually shielded twisted pairs
A cable having a plurality of individually shielded twisted pairs, ISTPs. Each shield has multiple layers. Each shield has a first surface and a second surface opposite the first surface. Each shield has a first longitudinally extending side and a second longitudinally extending side. Each shield is oriented around its respective twisted pair with a lateral fold or “cigarette wrap” fold. With respect to each shield, a portion of each shield's first longitudinally extending side is bonded to a portion of its second longitudinally extending side. An overall shield, often a braided construction, may surround the plurality of ISTPs. A cable jacket surrounds the overall shield and the plurality of individually shielded twisted pairs.
1 . A high speed data cable comprising:
a plurality of individual twisted pairs, each individual twisted pair includes a first insulated conductor twisted about a second insulated conductor;
a jacket surrounding said plurality of individual twisted pairs,
at least two of said twisted pairs each being laterally wrapped with a metal composite shield having a polymer layer and a metal layer, and said metal layer having a thickness of from about 0.0003 inches to 0.001 inches,
each of said shields has an inner surface and an outer surface opposite the inner surface and said outer surface facing said jacket,
each shield has a first overlapping longitudinal side and a second overlapping longitudinal side, and
said first and second overlapping sides being bonded together by a bonding agent and wherein said bonding agent and each of said shield provide improved resistance to deformation and impedance stability.
2 . The high speed data cable of claim 1 wherein said longitudinal side is folded over so that the outer surface contacts itself to provide a second longitudinal side fold, and
wherein the inner surface of said first longitudinal side is bonded to said second longitudinal side fold.
3 . The high speed data cable of claim 1 wherein said first longitudinal side is folded over so that the inner surface contacts itself to provide a first longitudinal side fold, and
wherein the outer surface of said second longitudinal side is bonded to said first longitudinal side fold.
4 . The high speed data cable of claim 1 wherein each of the metal shields comprises:
a first layer of aluminum having a thickness of 0.0003 to 0.001 inches a second layer of aluminum having a thickness of 0.0003 to 0.001 inches and a polymer layer between said first and second layer of aluminum.
5 . The high speed data cable of claim 2 wherein each of the metal shields comprises:
a first layer of aluminum having a thickness of 0.0003 to 0.001 inches, a second layer of aluminum having a thickness of 0.0003 to 0.001 inches, and a polymer layer between said first and second layer of aluminum.
6 . The high speed data cable of claim 3 wherein each of the metal shields comprises:
a first layer of aluminum having a thickness of 0.0003 to 0.001 inches, a second layer of aluminum having a thickness of 0.0003 to 0.001 inches, and a polymer layer between said first and second layer of aluminum.
7 . The high speed data cable of claim 1 wherein only one of the overlapping longitudinal sides has said bonding agent thereon.
8 . The high speed data cable of claim 4 wherein only one of the overlapping longitudinal sides has said bonding agent thereon.
9 . The high speed data cable of claim 5 wherein only one of the overlapping longitudinal sides has said bonding agent thereon.
10 . The high speed data cable of claim 6 wherein only one of the overlapping longitudinal sides has said bonding agent thereon.