Coaxial cable
AssigneeCommScope Properties, LLC
InventorsSteve Allen Fox, Michael Ahern
Life of this patent
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Abstract
A flexible coaxial cable comprises a core including at least one inner conductor and a closed cell foam dielectric surrounding the inner conductor. The flexible coaxial cable also includes a tubular metallic sheath closely surrounding and preferably bonded to the core. The closed cell foam dielectric is a low density polyolefin foam and possesses improved electrical properties over conventional foam dielectrics. The coaxial cable has a velocity of propagation of greater than 90 percent of the speed of light but still maintains high flexibility and bending characteristics.
Claims6
A method of making a coaxial cable comprising the steps of:
- advancing a conductor into and through an extruder and extruding thereon a foamable polymer composition comprising a polyolefin, an endothermic nucleating agent and a blowing agent;
- causing the foamable polymer composition to foam and expand to form a cable core comprised of an expanded foam dielectric surrounding the advancing conductor;
- and
- forming an electrically and mechanically continuous metallic sheath around the cable core to produce the coaxial cable.
Dependencies are inferred from the claim text.