Velocity-Modulated Tubes
- 1 February 1939
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 27 (2), 106-116
- https://doi.org/10.1109/jrproc.1939.229013
Abstract
This paper presents a simplified method of analyzing the operation of vacuum tubes at ultra-high frequencies. In this analysis the effects of electron velocity, conduction current, and induced current are separated. The theory leads to the development of a variety of new tubes. It is believed that these new tubes will be useful as oscillators, detectors, converters, and amplifiers in the 5-centimeter to 5-meter field. They have been used in receivers as oscillators and as super-heterodyne converters at 25 and 37 centimeters; and as oscillating detectors at 5 centiimeters. Power oscillators have been built which furnish 10 watts at 80 centimeters. Radio-frequency power amplifiers have been tested at 75 centimeters, with power outputs of 50 watts and plate efficiencies of 20 to 30 per cent.Keywords
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