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Accession Number:
AD0607731
Title:
STUDIES OF THE EFFECT OF CIRCUIT TAPERING ON TWT PERFORMANCE
Corporate Author:
STANFORD UNIV CA MICROWAVE LAB
Report Date:
1964-09-01
Abstract:
The main object of this research was to show that by proper tapering of the circuit characteristics of a pulsed, high-power traveling-wave amplifier, long-persisting pulse-edge oscillations could be successfully eliminated. Several types of circuit tapering have been considered, and a particular one was chosen for this empirical study. The type of circuit taper, which appears to have several advantages over others for suppression of pulse-edge oscillations, has both the pi-mode frequency increased and the phase velocity for the passband frequencies decreased gradually toward the output end of the tube. The effect of circuit tapering on forward-wave amplification has also been studied. A method was introduced for calculating the performance and an increase in gain was predicted for the aforementioned taper by this method when the tube was operated beyond the small-signal level. This effect was also measured experimentally on a high-power tube constructed for this purpose. The effect of circuit tapering on tube efficiency has been studied qualitatively. By using the conventional velocity-phase diagram, the possibility of improving the efficiency is indicated. However, a different kind of circuit tapering other than that used for this study is required.
Descriptive Note:
Technical documentary rept.
Supplementary Note:
DOI: 10.21236/AD0607731
Pages:
0132
Distribution Statement:
Approved for public release; distribution is unlimited. Document partially illegible.
Contract Number:
AF 30(602)-2575
File Size:
5.95MB
