PIC simulations and experimental design of a Cherenkov mm-wave source

Abstract

Numerical 3D PIC code simulations show that Slow-Wave-Structures SWSs demonstrate excellent potential as a virtual dielectric in a Cherenkov based Backward Wave Oscillator (BWO). CST Microwave Studio confirms internal mode coupling between a volume TM 0,6 and surface HE 20,1 modes resulting in the creation of a high-Q cavity, necessary for the Cherenkov mechanism to be exploited. MAGIC 3D demonstrates output powers of ~2.5 MW within a 30 ns timeframe at W-Band frequencies (75-110) GHz. Successful numerical modeling underpins the current experimental investigation.