Electrical transmission line

Details Electrical transmission line Electrical transmission line

1986-05-23

1987-10-20

Nimmo, Morris H.

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

174120R, 174120SR, 174110FC, 174110F, 174 36, H01B 1100

Patent

active

047015764

ABSTRACT:
An electrical transmission line of the twisted pair of coaxial cable type is provided. One line has a center conductor, a porous plastic dielectric disposed around the outer periphery of the conductor, the dielectric having specific gravity of 0.5 or less, and having a plastic dielectric sheath disposed around the outer periphery of the porous dielectric, the outer sheath having a melting temperature which is 60% or less than the melting temperature of the porous plastic dielectric. The porous plastic dielectric may be in tape form helically wrapped around the conductor, preferably at a wrap angle of 20 degrees or less. The preferred porous dielectric is expanded polytetrafluoroethylene.

REFERENCES:
patent: 4268714 (1981-05-01), Mori
patent: 4368350 (1983-01-01), Perelman
patent: 4468089 (1984-08-01), Brorein
patent: 4472595 (1984-09-01), Fox et al.
patent: 4486253 (1984-12-01), Gonia
patent: 4588852 (1986-05-01), Fetterolf et al.
"Fibrous, Porous TFE Provides Dimensional Stability for High Temperature, Low Loss Coaxial Cable"; Insulation/Circuits; Jun. 71; pp. 19-20.

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