Low loss coaxial cable
AssigneeFilotex
InventorsFrancois Vaille, Michel Dunand
Life of this patent
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Abstract
A low loss coaxial cable has a central supporting rod of plastic, covered in metal and forming the inner conductor or core of the coaxial cable. An intermediate insulation made of a dielectric material surrounds the inner conductor and an outer metal conductor surrounds the intermediate insulation. The central rod is made of polytetrafluoroethylene (PTFE) having a relative density greater than or equal to 1.6. The intermediate insulation has a relative density less than 1.2 and the ratio of the density of the dielectric constituting the intermediate insulation divided by the density of the PTFE constituting the rod lies in the range of 0.15 to 0.75.
Claims14
A low loss coaxial cable comprising:
- a central supporting rod of plastic, a metal inner conductor covering said rod;
- intermediate insulation made of a dielectric material surrounding said inner conductor;
- and
- an outer metal conductor surrounding said intermediate insulation;
- and wherein said central rod is made of polytetrafluoroethylene (PTFE) having a relative density greater than or equal to 1.6, said intermediate insulation having a relative density less than 1.2, and the ratio of the density of the dielectric constituting said intermediate insulation divided by the density of the PTFE constituting said rod lying in the range of 0.15 to 0.75, whereby the low loss coaxial cable can operate at continuous temperatures in excess of 125.degree. C., said coaxial cable is sufficiently flexible to accept small radii of curvature while showing low transmission losses even when being bent, said central supporting rod is capable of supporting the inner conductor without having the geometry of the central rod altered and is sufficiently stiff to provide minimal mechanical resistance to flexure of the cable.
Dependencies are inferred from the claim text.