Re: G-Line RF transmission technology
- More on the broadband "G-String" scheme; apparently never deployed:
--- In firstname.lastname@example.org, "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?