Traveling-Wave Tube Helix Impedance
- 1 November 1953
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 41 (11) , 1617-1623
- https://doi.org/10.1109/jrproc.1953.274189
Abstract
The impedance parameter of a circular helix, from which the gain of a helix-type traveling wave amplifier is computed, is investigated for a "Tape-Helix" model. Results obtained in this paper indicate that the impedance has a smaller value than for the "Sheath-Helix" model, and is considerably reduced at larger values of ka, the ratio of the helix circumference to the free space wavelength. A tape helix surrounded by a dielectric medium is analyzed. It is shown that the results obtained from the theory can be used to evaluate the helix impedance for usual types of traveling wave tubes. They have been found to be in agreement with measurements on many tube designs.Keywords
This publication has 3 references indexed in Scilit:
- The Calculation of Traveling-Wave-Tube GainProceedings of the IRE, 1951
- Experimental Determination of Helical-Wave PropertiesProceedings of the IRE, 1948
- The Traveling-Wave Tube as Amplifier at MicrowavesProceedings of the IRE, 1947