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Technical Notes
Page 11
Traveling Wave Tube
Translated from German
All Italics mine. Kevin O'Neill
View Diagram Here
The traveling wave tube is used in oscillators and
amplifiers for gigahertz frequencies.
The electrons produce a straight beam from the cathode
to the anode. The anode contains a hole, by which the
electrons withdraw through the long tube. A spiral coil
of wire is wound around the pipe. The distributed
capacitance and inductance of this coil produce a very
low speed factor in the electron beam.
TS! (the speed factor is the relationship
of the speed of an electro magnetic field in a medium
times one hundred to the speed in the vacuum.
v = 100 c1 divided by C
(c = 299.792 km/seconds))
The factor within the tube is approximately 10-20%. The
wound wire (Helix) energy gets if now, then oscillations
within the tube, which run forward or backwards and from
20 -100 milli Watts of energy with frequencies from
gigahertz, develop. The oscillations can be uncoupled at
the beginning or end. The traveling wave tube produces
very stable frequencies. |
