|Publisher DOI:||10.1017/S1759078717001349||Title:||Comparative study of envelope models for hybrid time- and frequency-domain simulation of traveling-wave tubes||Language:||English||Authors:||Safi, Djamschid
|Issue Date:||Jun-2018||Source:||International Journal of Microwave and Wireless Technologies 5-6 (10): 521-529 (2018-06)||Journal or Series Name:||International journal of microwave and wireless technologies||Abstract (english):||© 2018 Cambridge University Press and the European Microwave Association. A selection of hybrid frequency-and time-domain approaches is evaluated with respect to their suitability for predicting the multi-tone behavior of a reference Ku-band helix traveling-wave tube. For this, a frequency-domain code is extended by a selection of frequency-dependent and frequency-independent envelope models and compared to a number of simulated and measured responses to two-tone signal excitation with varying frequency spacing. The selected envelope methods are investigated both in the hybrid approach and based on measured TWT characteristics. Output levels and classical multi-tone metrics, such as intermodulation products and phase transfer factors, are considered. By reducing a modulation scenario to a number of significant sequences, a comparison to full physics-based frequency-domain simulation is presented to show the potential of the proposed approach.||URI:||http://hdl.handle.net/11420/2151||ISSN:||1759-0795||Institute:||Hochfrequenztechnik E-3||Type:||(wissenschaftlicher) Artikel|
|Appears in Collections:||Publications without fulltext|
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