Title :
Experimental Determination of Helical-Wave Properties
Author_Institution :
Bell Telephone Laboratories, Inc., Murray Hill, N.J.
Abstract :
The properties of the wave propagated along a helix used in the traveling-wave amplifier are discussed. A description is given of measurements of field strength on the axis, field distribution around the helix, and the velocity of propagation. It is concluded that the actual field in the helix described is slightly weaker than would be predicted from the relations presented by J. R. Pierce for a hypothetical helical surface.
Keywords :
Coaxial components; Distortion measurement; Electric variables measurement; Frequency measurement; Magnetic field measurement; Power transmission lines; Probes; Size measurement; Velocity measurement; Wavelength measurement;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1948.233590
