Large Signal TWT Computer Theory
Abstract
The implementation of variable circuit parameters along the axis involves the handling of velocity tapers, impedance tapers, and variable attenuator sections, all in any prescribed fashion. The second area is concerned with analysis of backward wave instabilities under the same conditions of variable parameters along the tube. In particular, the theory is applicable for segmented TWTs, i.e., tubes with several sections of otherwise constant circuit parameters. Such configurations are known to reduce backward wave instabilities, but the underlying theoretical background and the modeling have been inadequate. In particular, the symmetries and coupling relations of beam and circuit modes have not been sufficiently well understood. The present work is an effort to contribute to a better understanding of these effects and provide improved models and mathematical procedures for use in numerical analysis of backward wave instabilities. One part of the investigation is the analysis of the properties of the beam modes involved in backward wave interactions. These have different symmetries from the usual circularly symmetric modes involved in forward interaction, and need special consideration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1980
- Accession Number
- ADA090748
Entities
People
- Tore Wessel-berg
Organizations
- Hughes Aircraft Company