Title :
Hybrid time-domain measurement and pre-distortion of broadband complex waveforms in a Ka-band TWT amplifier
Author :
Stantchev, G. ; Abe, D. ; Levush, Baruch ; Hanna, J. ; Chernin, D. ; Antonsen, T.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
Abstract :
We present a technique for time-domain measurement and predistortion of complex wideband waveforms in a Ka-band helix TWT power amplifier. The measurement technique relies on a hybrid calibration procedure that uses both single tone and wideband multitone calibration for characterizing the amplifier response to simultaneous excitation across its operating frequency band. We compare our measurements with simulation data from a well-established physics-based, large signal, multi-frequency spectral code, CHRISTINE [1].
Keywords :
calibration; power amplifiers; travelling wave amplifiers; travelling wave tubes; Ka band TWT amplifier; Ka band helix TWT power amplifier; amplifier response; broadband complex waveform; complex wideband waveform; hybrid calibration procedure; hybrid time domain measurement; multifrequency spectral code; wideband multitone calibration; Baseband; Calibration; Frequency measurement; Frequency modulation; Power measurement; Time-domain analysis; Wideband; complex waveforms; microwave time-domain measurements; nonlinearities; traveling wave tubes; wideband amplifiers;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2013 IEEE 14th International
Conference_Location :
Paris
Print_ISBN :
978-1-4673-5976-4
DOI :
10.1109/IVEC.2013.6571122
