In this theoretical paper, we exploit the high-gain, through narrowband, po
tential of a vane-loaded gyro-TWT to suggest a two-section vane-loaded devi
ce configuration for large gains and bandwidths. We predict the lengths as
well as the vane parameters and the background magnetic fields of the indiv
idual sections for the desired performance. (C) 2000 John Wiley & Sons, Inc
.