Title :
Envelop tracking concept for space TWTs with higher efficiency
Author_Institution :
Thales Electron Devices, Vélizy, France
Abstract :
The high efficiency requirements for space TWTs can be addressed by envelop tracking. In the new concept we describe here the beam current is commanded by the instantaneous envelop power of the modulated signal to be amplified. New technologies of cold cathodes could enable such current modulation in the future. Here we assess the benefits of envelop tracking concept for different kinds of modulation scheme.
Keywords :
cathodes; modulation; radiofrequency power amplifiers; travelling wave tubes; RF power amplifier; beam current; cold cathodes; current modulation; envelop power; envelop tracking concept; high efficiency requirements; modulated signal; space TWT; Anodes; Cathodes; Frequency modulation; Phase shift keying; Satellites; Standards; Space TWTs; envelop tracking; modulation;
Conference_Titel :
Vacuum Electronics Conference, IEEE International
Conference_Location :
Monterey, CA
DOI :
10.1109/IVEC.2014.6857484
