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  
Birtel, Philip 
Meyne, Sascha 
Jacob, Arne 
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): 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.
ISSN: 1759-0795
Institute: Hochfrequenztechnik E-3 
Type: (wissenschaftlicher) Artikel
Project: Zeitbereichssimulation von Wanderfeldröhren mit modulierten Ein- und Mehrträgersignalen 
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