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Re: G-Line RF transmission technology

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  • OZOB99
    More on the broadband G-String scheme; apparently never deployed: http://www.dtic.mil/dtic/tr/fulltext/u2/a509809.pdf P31
    Message 1 of 8 , Jul 11, 2012
      More on the broadband "G-String" scheme; apparently never deployed:

      http://www.dtic.mil/dtic/tr/fulltext/u2/a509809.pdf P31


      --- In coldwarcomms@yahoogroups.com, "Albert LaFrance" <lafrance@...> wrote:
      > The Nov. 1956 issue of Radio & Television News magazine contains an article
      > (on p. 40) describing an aerial CATV distribution network using a technology
      > called the G-Line. The "G" signifies the inventor, Dr. George Goubau, who
      > developed the transmission line for the Army Signal Corps. Commercial
      > patent rights to the technology were held by a Surface Conduction, Inc.
      > Essentially, the G-line is a single-conductor, open-wire line which
      > functions like a coaxial cable. At each end of the line, the transition to
      > conventional coaxial cable is accomplished by a conical sheet-metal
      > transducer called a "launcher", which looks like a funnel. The outer
      > conductor of the coax connects to the apex of the cone, while the inner
      > conductor passes straight through the cone and continues as an insulated
      > single conductor. This wire is supported at crossarms by a simple sling of
      > nylon rope, rather than the usual porcelain or glass insulators.
      > As best I understand the theory, the G-Line is electrically equivalent to a
      > coaxial cable with an outer conductor of infinite diameter, with the signal
      > propagating in an axial mode along the open wire. The diameter and taper of
      > the launcher and the dielectric properties of the open wire's insulation are
      > important factors
      > Does anyone know what became of this technology? Was it used in other
      > applications? Is it being used today?
      > Albert
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