APPLIED RESEARCH ON EFFICIENCY IMPROVEMENT IN O-TYPE TRAVELING-WAVE TUBES.
Abstract
A single voltage jump taper has been tested in the demountable apparatus. The preliminary results show that substantial efficiency improvements are possible with this method. Electronic efficiencies up to 43%, and depressed efficiencies up to 56% have been observed. At the best over-all efficiency the electronic efficiency is improved by 30% (factor 1.3) and the depressed collector efficiency by 20% (factor 1.2) as compared with the highest efficiencies which could be obtained with the standard circuit alone. The circuit parameters were reevaluated with the electron beam and a significant change of the 'hot circuit' parameters from those of the cold circuit was observed. The 'hot' phase velocities were found to be about 10 to 15% higher, while the 'hot' coupling impedance was about 10 to 20% lower than the cold circuit parameters, practically independent of the frequency. Corrected tube parameters based on the 'hot circuit' parameters are given. The design of velocity step tapers for coupled cavity circuits is outlined in detail. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0616736
Entities
People
- O. Sauseng
Organizations
- Hughes Aircraft Company