Compact mechanical frequency-tunable coaxial relativistic Cherenkov oscillator
Year: 2025
Type: article
Abstract: A compact coaxial relativistic Cherenkov oscillator with mechanical frequency-tuning capability is proposed and numerically investigated. By axially adjusting the position of a tuning ring located at the end-reflective collector, phase modulation of the reflected electromagnetic waves enables frequency agility. The device demonstrates continuous frequency tuning from 9.04 to 9.66 GHz through a 9 mm axial displacement of the tuning ring, corresponding to a relative bandwidth of 6.6%. Numerical simulations reveal gigawatt-level output power with peak conversion efficiency reaching 35%. The device maintains compact dimensions of 140 mm in axial length and 45 mm in radial dimension, achieving frequency reconfiguration through a simple mechanical adjustment without requiring complex multi-segment synchronization mechanisms. This work provides a viable solution for balancing frequency-agile operation and structural simplicity in high-power microwave generation systems.
Source: Journal of Applied Physics
DOI: 10.1063/5.0279296
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,500
OpenAlex ID: W4413193526