Cold and hot matching of coupled-cavity traveling-wave tubes

Publikationstyp
Conference Paper
Date Issued
2014-03
Sprache
English
Author(s)
Meyne, Sascha  
David, Jean Francois  
Jacob, Arne  
Institut
Hochfrequenztechnik E-3  
TORE-URI
http://hdl.handle.net/11420/6178
Citation
German Microwave Conference, GeMiC: (2014-03)
Contribution to Conference
8th German Microwave Conference, GeMiC 2014  
Scopus ID
2-s2.0-85084015799
The matching condition for coupled-cavity traveling-wave tubes is derived from an eigenvalue formulation. The slow-wave structure is modeled by a simple equivalent circuit, and cold operation, i.e. without electron beam, is assumed. Several case studies of simple input and output matching circuits are presented. A dispersion analysis both without and with beam coupling is performed. It reveals the strong influence of the beam. Finally, the input reflection is exemplarily simulated in the presence of electron beams of different intensity (hot match). Beam coupling is shown to substantially alter the matching condition. This effect has to be considered when designing traveling-wave tubes based on cold data.