Simulation Study of a High Order Mode Multi-Sheet Beam R-Band Extended Interaction Oscillator Based on Carbon-Nanotube Cold Cathode

An Extended Interaction Oscillator (EIO) with five electron beams, which operates at a higher order mode, is simulated. The operation of multiple electron beams in a high¬order cavity means that a higher total electron beam current interacts with a large cavity field energy to obtain a higher output power. Particle-in-cell (PIC) simulation shows that the EIO operating at TM51 mode has an output power of about 13 W at 301 GHz when the electron beam voltage and current density are 19.85 kV and 60 A/cm2 respectively.