Design of a Highly Efficient Metamaterial-Assisted Electron-Beam Structure for x-band Backward Wave Oscillator Applications

In this article, a beam-wave interaction simulation of metamaterial (MTM)-assisted electron-beam structure is presented. The electron-beam structure is formed by an array of {x} -band complementary electric split ring resonators (CeSRRs) inserted into a circular waveguide. CST Particle Studio is us...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2023-10, Vol.51 (10), p.2983-2987
Main Authors: Kumari, Sweta, Jain, Pradip Kumar, Mahto, Manpuran
Format: Article
Language:English
Subjects:
Backward waves
Circular waveguides
Dispersion
Electron beams
High power microwave (HPM)
Magnetic fields
Metamaterials
metamaterials (MTMs)
Microwave oscillators
microwave tubes
Periodic structures
Radio frequency
Simulation
vacuum electron devices (VEDs)
Voltage
Wave interaction
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Summary:In this article, a beam-wave interaction simulation of metamaterial (MTM)-assisted electron-beam structure is presented. The electron-beam structure is formed by an array of {x} -band complementary electric split ring resonators (CeSRRs) inserted into a circular waveguide. CST Particle Studio is used for the beam present simulation of the MTM-assisted electron-beam structure. With typically selected beam voltage of 190 kV, beam current of 11 A, and focusing magnetic field of 0.39 T, the particle-in-cell (PIC) simulation predicts an average RF output power of ~0.96 MW with a conversion efficiency of ~46%. The proposed MTM-assisted electron-beam structure, with its high-efficiency capability, can have the potential applications in possible microwave oscillators, i.e., backward wave oscillators (BWOs).
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2023.3310115