DIMOHA: Traveling-wave tube simulations including band edge and multiple-carriers operations

A new kind of time domain simulation for traveling-wave tube (TWT) is presented. The DIMOHA algorithm should be considered as an alternative to current particle-in-cell (PIC) and frequency approaches. To assess its validity, a comparison with a commercial Ku-band tapered helix TWT is performed. It shows an excellent agreement for the output power and the nonlinear phase shift at various frequencies. The algorithm is also tested near the band edge and for multitone simulations, both with success.