The adaptive method of complex amplitudes in spectral models of microwave devices

The modification of the method of complex amplitudes for simulation of RF fields in microwave tube slow-wave circuits is proposed. It allows one to increase the broadbandness of the spectral models based on this method, up to values of the similar parameter obtained based on the method of instantaneous values models. All the advantages of complex amplitudes usage are retained. Modification is in the continuous monitoring of an electron beam oscillations spectrum with periodic adjustment of a set of model base frequencies. An example of the offered adaptive method applicability domain is given.