Design and Simulation of W-band Second Harmonic Periodically Loaded Gyro-TWT Amplifier

Abstract

A W-band gyro-TWT amplifier using a periodic lossy dielectric disc loaded RF interaction structure operating in second harmonic TE02 mode is presented. The dielectric loaded linear section is used to suppress the potential BWOs. The present gyro-TWT is modeled in 3D particle-in-cell (PIC) tool to study its beam-wave interaction behavior. The simulation shows a peak power of 600kW in a second harmonic TE02mode for the DC drive of 100kV, 25 A. The electronic efficiency of the present amplifier is calculated as 24% and the saturated gain is 30dB. The -3dB bandwidth of the amplifier is 4.2GHz. © 2019 IEEE.