Ka-band relativistic diffraction generator with a tapered coaxial Bragg reflector
Source abstract
Abstract
A coaxial line with periodically tapered inner rode corrugated ripples is introduced to act as a distributed Bragg reflector to increase output microwave power of relativistic diffraction generator (RDG). The RDG device consists of an overmoded cross-section, two-sectional disk-loaded cylindrical slow-wave structure (SWS), and coaxial reflector is placed upstream at the first SWS section. The RDG device with tapered Bragg reflector is investigated by full three-dimensional Particle-in-Cell (PIC) simulations and experiments in this paper. The structural parameters of the reflector are optimized for favorable characteristic of mode selection and frequency response. It is found that oscillation modes varied at different magnetic field magnitude. The measured radiation power at 29∼31 GHz is over 300 MW for TM01 mode and over 700 MW for TM11 mode. Results show that the reflector has a great impact on performance of the device. Operating at proper conditions, the radiation power is remarkably enhanced.
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Research context
OpenAlex topics: Gyrotron and Vacuum Electronics Research · Pulsed Power Technology Applications · Microwave Engineering and Waveguides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physical Electronics, University of Electronic Science and Technology of China 1 , 610054 Chengdu, Sichuan, P. R. China
Department of Electrical Engineering and Computer Science, University of Michigan 2 , Ann Arbor, MI 48109-2121, USA
Funding
National Natural Science Foundation of China
References (24)
Show source-provided references
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