Comparative study of envelope models for hybrid time- and frequency-domain simulation of traveling-wave tubes

Publikationstyp
Journal Article
Date Issued
2018-06
Sprache
English
Author(s)
Safi, Djamschid  orcid-logo
Birtel, Philip  
Meyne, Sascha  
Jacob, Arne  
Institut
Hochfrequenztechnik E-3  
TORE-URI
http://hdl.handle.net/11420/2151
Journal
International journal of microwave and wireless technologies  
Volume
10
Issue
5-6
Start Page
521
End Page
529
Citation
International Journal of Microwave and Wireless Technologies 5-6 (10): 521-529 (2018-06)
Publisher DOI
10.1017/S1759078717001349
Scopus ID
2-s2.0-85094684157
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.