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Electrically optimized hybird "last mile" telecommunications cable system

  • US 6,091,025 A
  • Filed: 07/29/1998
  • Issued: 07/18/2000
  • Est. Priority Date: 07/29/1997
  • Status: Expired due to Fees
First Claim
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1. A quad electrical signal cable having a central axis and a length, comprising:

  • a) four electrical conductors of substantially equal length disposed lengthwise within said cable, said four electrical conductors associated as two each in two pairs;

    b) a positioner disposed within said cable and extending along a substantial portion of the length of said cable, said positioner formed of a substantially insulating material;

    c) said two pairs of conductors disposed by said positioner within the cable such that said conductors occupy radial positions substantially equidistant from said central axis, and each conductor of a pair occupying a diametrically opposite position from the other conductor of the pair, said pairs substantially subtending an angle of 90 degrees with respect to each other and further having a helical twist throughout a substantial portion of the length of said cable, whereby substantially spiral and orthogonal electrical signal paths throughout said length of said cable are formed;

    d) such that the material forming said positioner is selected from the group consisting of thermally moldable plastic materials having substantially low dielectric constants and low dielectric losses;

    e) said positioner centered about said central axis and further having an outer diameter greater than twice a radial distance from said central axis to a radially outermost extent of said conductors,such that said positioner includes four longitudinal insulating and positioning members generally extending said length of said cable, each having a substantially similar quadrant cross section, each containing at least two aperture spaces, each aperture space located on two respective radial surfaces, and such that a conjunction of the four members retains said four conductors in respective ones of a set of four spaces formed by a pairwise conjunction of the eight said aperture spaces.

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