Sub-terahertz Planar Relativistic Surface-wave Oscillator with Two-dimensional Distributed Feedback Based on High-current Explosive Emission Electron Beam

This report presents the results of theoretical and experimental studies of G-band relativistic surface-wave oscillator, the electrodynamic system of which uses a two-dimensional slow-wave structure that provides mode selection along a wide transverse coordinate. Theoretical analysis based on quasi-optical approach is carried out and demonstrate efficient single-mode operation in this scheme. Stable oscillation regime is obtained at G-band with output power level of about 50 MW. The theoretical predictions are in good agreement with full-scale 3D PIC (particle-in-cell) simulations. The main components of the oscillator have been manufactured and testing has begun. The possibility of further advancement of this oscillators class in the terahertz range up to a frequency of 1 THz is being discussed.