High efficiency dual mode octave bandwidth traveling wave tube
Abstract
Techniques resulting in high overall efficiency over extended bandwidths have been considered in this study effort. The study was complicated by both the high average power requirement and the 10 db pulse up dual mode capability plus PPM focusing. Experimental cold testing dealing with helices of different pitch was performed. Suitable shaping methods resulted in high interaction impedances with small phase velocity variations over octave bandwidths. Large signal computer evaluations considering beam-circuit wave velocity resynchronization schemes were conducted. An existing experimental dual mode electron gun was scaled and structurally adapted for PPM focusing. A satisfactory match was designed and demonstrated for both input and output transducers.
- Publication:
-
Interim Technical Report
- Pub Date:
- November 1974
- Bibcode:
- 1974hac..reptS....M
- Keywords:
-
- Bandwidth;
- Electron Guns;
- Pulse Position Modulation;
- Traveling Wave Tubes;
- Computer Techniques;
- Octaves;
- Phase Velocity;
- Signal Processing;
- Electronics and Electrical Engineering