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June 1963 Radio-Electronics
 [Table of Contents]
Wax nostalgic about and learn from the history of early electronics.
See articles from Radio-Electronics,
published 1930-1988. All copyrights hereby acknowledged.
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The
G-Line transmission line
is another of those things where I can't imagine being smart enough to come up
with the idea, and then implement a working model - like with the enclosed
waveguide. Dr. George Goubau (from whence the "G" in the name derives) is the
genius in this case. He determined that a sort of waveguide could be made with a
single conductor surrounded by insulation with a specific dielectric constant
that would cause the dielectric-air interface to reflect the wave in a manner
similar to atmospheric channels that facilitate long distance communications.
I'm guessing the Surface Conduction company advertising the
G-Line
for sale in this 1963 issue of Radio-Electronics magazine is Dr. Goubau's
enterprise. That was ten years after inventing it. The G-Line's boasts are low
loss (6 dB/mile), no radiation, and a 300-ohm impedance. The primary
disadvantage of the G-Line transmission line is its limited efficiency at higher
frequencies due to increased surface wave attenuation and sensitivity to
environmental obstructions, making it less practical for modern high-frequency
applications compared to conventional waveguides or coaxial cables.
G-Line" Single-Wire, Low Loss Transmission Line
 "No Booster" solution to UHF problems
"G-Line·
TV servicemen can now substantially extend the range of UHF reception with this
new, inexpensive, single-wire, low loss transmission line - only 6 db for 500 ft.
Complete kit includes 150 feet of special wire ... List Price, ... $56.00
Extra 100 ft. rolls ... $8.00 per roll.
Write for "G-Line" Catalog of "No Booster" CATV (up to 4·mi.); also Microwave
and Hi-Power lines.
Surface Conduction, Inc.
1501 Broadway
New York 36, New York
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