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Report presents the results of calculations and numerical modeling of quasi-stationary, nanosecond relativistic X-band and Ka-band BWOs with peak power exceeding 100 MW where magnetic field guided electron beam (0.5–1.7 T) could be created by permanent magnets made of highly-coercivity materials. Magnetic field interpolation of the permanent magnets was used in numerical models of microwave devices...
The paper provides a review of experimental research on a backward-wave oscillator with a resonant wave reflector (BWO-RR) which provides frequency tuning within 11 %, extremely high microwave peak power (up to 5 GW in the X-band and 0.2 GW in the K-band), and 35 % efficiency.
In experiment, mechanical pulse-to-pulse frequency tuning was realized in a repetitively pulsed (1 s, 50 Hz) relativistic backward-wave oscillator with a resonant reflector in a 0.36-T magnetic field. The tuning bandwidth was ~ 9% at a level of -3 dB of microwave peak power. The microwave peak power in a batch was 2.5 plusmn 0.6 GW at a frequency of ap3.6 GHz, an efficiency of 20% plusmn 4%, and a...
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