Bifilar Helix for Backward-Wave Oscillators
- 1 July 1954
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 42 (7) , 1137-1143
- https://doi.org/10.1109/JRPROC.1954.274546
Abstract
A bifilar helix used as the slow wave circuit for the backward-wave oscillator is investigated in this paper. Calculations show that the bifilar helix has a higher impedance than that of the ordinary single-wire helix. The propagating characteristics of the bifilar helix are analyzed and some experimental results of cold measurements are presented. It is also shown that with a bifilar helix, a periodic electrostatic field which can be used to focus the electron stream is readily obtained by applying a proper dc potential difference between two helical wires. The same bifilar structure may thus be used both for the propagating and for the focusing circuit. A tube of this kind has been constructed and the experimental results are described.Keywords
This publication has 4 references indexed in Scilit:
- Focusing of a Long Cylindrical Electron Stream by Means of Periodic Electrostatic FieldsJournal of Applied Physics, 1954
- Backward-Wave TubesProceedings of the IRE, 1953
- Traveling-Wave Tube Helix ImpedanceProceedings of the IRE, 1953
- The Strong-Focusing Synchroton—A New High Energy AcceleratorPhysical Review B, 1952