Gyro-TWT Using a Metal PBG Waveguide as Its RF Circuit-Part I: Analysis and Design

Abstract

A gyro-TWT using a metal photonic bandgap (PBG) waveguide as its RF circuit has been analyzed using a self-consistent nonlinear analysis. The analysis focuses on single-mode operation of gyro-TWT by eliminating the mode competition problem existing in an overmoded structure using a mode-selective PBG circuit. A Ka-band, TE01 waveguide mode PBG gyro-TWT has been designed, and analytical results have been computed to demonstrate the beam-wave interaction mechanism of the device. The nonlinear analysis predicted ∼ 91-kW RF output power with an electronic efficiency of ∼ 13 % and the saturated gain of ∼ 40 dB from this device. © 2015 IEEE.