Development of large signal codes for modeling of multiple beam folded waveguide TWTs

Multiple beam traveling wave tubes (MB-TWTs) are attractive novel devices with enhanced power-bandwidth characteristics
¹
. However, they are more vulnerable to spurious oscillations than single beam TWTs. Therefore, design codes for MB-TWTs should be capable of accurate prediction of MB-TWT operation in steady-state regime as well as prediction of spurious oscillations onset for different modes. Complexity of multiple beam slow wave structures is also one of challenging factors requiring for computational efficiency of design codes.