Title :
From Frequency-Domain Physics-Based Simulation to Time-Domain Modeling of Traveling-Wave Tube Amplifiers for High Data-Rate Communication Applications
Author :
Safier, Pedro N. ; Dronov, Vasily ; Antonsen, Thomas M., Jr. ; Qiu, Joe X. ; Danly, Bruce G. ; Levush, Baruch
Author_Institution :
S&J Solutions, Alexandria, VA
Abstract :
We report here on a methodology to use frequency-domain physics-based nonlinear simulations of traveling-wave tubes (TWTs) in block time-domain models. We present examples using an improved version of the large-signal code CHRISTINE and a two-block baseband time-dependent model with a feedback loop that takes into account reflections internal to the TWT. The novelty in this approach is that it enables us to relate digital performance to the physical characteristics of the device, and it has the potential to significantly impact the analysis of TWT amplifiers for high data-rate applications
Keywords :
frequency-domain synthesis; radio equipment; time-domain synthesis; travelling wave amplifiers; travelling wave tubes; CHRISTINE code; frequency-domain simulation; high data-rate communication; high-power amplifier; nonlinear simulations; physics-based simulation; time-domain modeling; traveling-wave tube amplifiers; Bit error rate; Broadband amplifiers; Computational modeling; Frequency domain analysis; Power amplifiers; Power system modeling; Predictive models; Reflection; Solid modeling; Time domain analysis; Block model; CHRISTINE; digital; helix; high-power amplifier; nonlinear model; reflections; traveling-wave tube amplifier (TWTA);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2006.882885
