According to this full-page advertisement
in the June 1955 issue of Radio & Television News magazine, Bell Telephone
Laboratories was responsible for designing and fielding "waveguide pipe," aka flexible
circular waveguides. According to other historical sources, both
George Southworth of Bell Telephone Laboratories and
Barrow of the Massachusetts Institute of Technology (M.I.T.) independently and
simultaneously developed circular waveguide, but the early devices were rigid pipe
rather than being fabricated from tightly wrapped, insulated wire that permitted
it to be bent rather than requiring separate corner and offset pieces. Insertion
loss and VSWR is typically not as good as with rigid waveguide, but the ease of
installation in many situations justifies the poorer electrical performance. Bell
Telephone Laboratories was responsible for a huge number of breakthrough and paradigm-changing
discoveries prior to being broken into parts (Regional Bell Operating Companies,
Baby Bells) in 1984 due to an antitrust lawsuit.
Bell Telephone Laboratories Ad - Pipes of Progress
Hundreds of thousands of telephone conversations
or hundreds of television programs may one day travel together from city to city
through round waveguides - hollow pipes - pioneered at Bell Telephone Laboratories.
Round waveguides offer tremendous possibilities in the endless search for new
ways to send many voices great distances, simultaneously, and at low cost. Today,
Bell Laboratories developments such as radio relay, coaxial cable and multivoice
wire circuits are ample for America's needs. But tomorrow's demands may well call
for the even greater capacity of round waveguides.
Unlike wires or coaxial, these pipes have the unique property of diminishing
power losses as frequencies rise. This means that higher frequencies can be used.
As the frequency band widens, it makes room for many more voices and television
programs. And the voices will be true, the pictures faithfully transmitted.
These studies illustrate once more how Bell Telephone Laboratories scientists
look ahead. They make sure that America's telephone service will always meet America's
needs, at the lowest possible cost.
New type of waveguide pipe formed of tightly wound insulated wire transmits better
around corners than solid-wall pipes.
New type waveguide is bent on wooden forms for study of effect of curvature on
transmission,. The waveguide itself is here covered with a protective coating.
Testing round waveguides at Bell Telephone Laboratories, Holmdel, New Jersey.
Unlike coaxial cable, waveguides have no central conductor. Theoretically, voice-capacity
is much greater than in coaxial cable.
Bell Telephone Laboratories
Improving America's telephone service provides careers for creative men in scientific
and technical fields.
- The Battle of
the Atoms - 4/1948 Radio News
The Transistor - 6/1952 Radio-Electronics
- 90-Mile Laboratory
for Telephone and Television, 6/1945 Radio News
Wire-Wrap, 10/53 Radio-Electronics
EDT Crystals, 10/47 Radio-Craft
- Germanium Refining,
5/54 Radio & TV News
- Crystal Timekeeping,
1/46 Radio News
Cable, 11/56 Radio & Television News
- Pipe Circuits,
11/48 Radio & Television News
Electron Tube, 6/54 Radio & Television News
Wire Bonding, 3/58 Radio News
Radio Relay Stations, 8/52 Radio & Television News
6/56 Radio & Television News
Cards, 3/55 Radio & Television News
Communications, 10/55 Radio & Television News
Devices, 2/58 Radio & TV News
Adventure in Silicon, 5/55 Radio & Television News
- Pipes of Progress,
6/55 Radio & Television News
Project Echo, 11/60 Electronics World
Type-O Carrier System, October 1952 Radio-Electronics
Electron Microscope, 4/1952 Radio-Electronics
- Thermistor, 11/1946 Radio-Craft
Germanium Crystal, 1/1954 Radio-Electronics
Antenna, 5/46 Radio-Craft
- Quality Control, 6/46
Radio News Article
Radio-Relay, 10/51 Radio & TV News
Battery, 7/54 Radio & Television News
Germanium Transistors, 1/54 Radio & Television News
Magnetron, 10/45 Radio News
The Cableman, 10/49 Radio & Television News
Coaxial Cable, 12/49 Radio & Television News
Whiskers, 12/55 Radio & Television News
Contact Inspection, 7/55 Radio & Television News
10th Anniversary, 6/58 Radio & Television News
Wrapping, 10/53 Radio & Television News
Diode Amplifier, 11/58 Radio News
Nobel Prize Winners, 2/57 Radio & Television News
Diode Speeds Voices, 8/58 Popular Electronics
Microwave Relays, 7/59 Electronics World
Posted February 12, 2019