Design of Ultra-Efficient Klystron-Like RBWO with Dual Trapezoidal Resonant Reflector with Ridges

An ultra-efficient klystron-like relativistic backward wave oscillator with dual resonant reflectors with ridges operated in X-band has been designed. The proposed device structure has been modeled in a finite difference time domain-based particle-in-cell code to study its beam-wave interaction behavior and its impact on R/Q factor, different magnetic field and beam voltage. The particle-in-cell simulations predict an RF output power of ~3.11 GW at ~9.5 GHz with an enhanced efficiency of ~81 %, and a pulse length of ~68 ns at a magnetic field of ~2.9 T.