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Definition 2025
travelling-wave_tube
travelling-wave tube
See also: travelling wave tube
English
a travelling-wave tube
Alternative forms
- traveling-wave tube
- traveling wave tube
- travelling wave tube
Noun
travelling-wave tube (plural travelling-wave tubes)
- (electronics) A type of vacuum tube which amplifies electromagnetic signals, where the electron gun fires down the tube with an unmodulated electron beam, that passes through an interaction array, where the EM-signal is fed, which interacts with the electron beam, bunching the electrons, and transferring power to the signal.[1]
Usage notes
The TWT's electron gun is typically a thermionic cathodic emitters. The usual design for the interaction grid is a helix wrapped around the beam's transmission tube. Modern TWTs have a depressed collector to recuperate unused power in the electron beam after it has passed through the interaction grid. Modern tubes are metal- instead of glass-encased. Radiator fins may be attached for heat management.[1]
Synonyms
- TWT (abbreviation)
Hypernyms
Derived terms
- TWT (abbreviation)
- cold cathode travelling-wave tube (cold cathode TWT)