Analysis and Design of a phase linearization system for traveling wave tube amplifiers
Abstract
A concise theory of the operation of traveling wave tube amplifiers TWTA is presented. The tradeoff between efficiency and nonlinearity is emphasized. Distortion in transmission of a television signal caused by nonlinearities, such as AM/PM conversion, in the TWTA of a communication channel is discussed. The performance measurement of an X-band TWTA for satellite communication and the measurement of related nonlinearity is outlined. The analysis and design of a phase linearization system which considerably reduces the AM/PM conversion coeffficient and so allows the TWTA to be operated at saturated power are shown. The study was conducted in the 11 GHz frequency band and applications to satellite television transmission are cited.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- November 1977
- Bibcode:
- 1977STIN...8011362P
- Keywords:
-
- Amplitude Modulation;
- Linear Systems;
- Parametric Frequency Converters;
- Phase Modulation;
- Traveling Wave Amplifiers;
- Satellite Communication;
- Satellite Television;
- Signal Distortion;
- Superhigh Frequencies;
- Traveling Wave Tubes;
- Electronics and Electrical Engineering