Simulation of high-efficiency relativistic backward wave oscillator in Q-band with low magnetic field

Zhang Qian; Wu Yang; Li Shifeng

doi:10.11884/HPLPB202537.250089

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Zhang Qian, Wu Yang, Li Shifeng. Simulation of high-efficiency relativistic backward wave oscillator in Q-band with low magnetic field[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250089

Citation:

Zhang Qian, Wu Yang, Li Shifeng. Simulation of high-efficiency relativistic backward wave oscillator in Q-band with low magnetic field[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250089

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Simulation of high-efficiency relativistic backward wave oscillator in Q-band with low magnetic field

doi: 10.11884/HPLPB202537.250089

Zhang Qian^{1, 2
,},
Wu Yang¹,
Li Shifeng¹

1.
Institute of Applied Electronics, CAEP, Mianyang 621900, China
2.
Graduate School of China Academy of Engineering Physics, Mianyang 621900, China

Received Date: 2025-04-22
Accepted Date: 2025-06-10
Rev Recd Date: 2025-06-12

Available Online: 2025-06-21

Abstract

Abstract

This paper proposes a compact Q-band relativistic backward wave oscillator (RBWO) operating at low magnetic fields, aiming to advance the miniaturization of high-power microwave (HPM) sources. The device consists of a resonant cavity reflector and two sections of periodic slow-wave structures (SWS), designed in a coaxial configuration. By exploiting the inherent characteristics of the coaxial structure, an optimal inner diameter was selected to enhance power handling capacity while mitigating space charge effects induced by the reduced device size. Through comprehensive simulation and optimization, the device achieved a microwave output power of 470 MW with an efficiency of 39.1% under operational conditions of a guiding magnetic field (B = 0.9 T), a diode voltage of 400 kV, and a beam current of 3 kA. The generated microwave signal exhibited a central frequency of 45 GHz.
- high power microwave,
- relativistic backward wave oscillator,
- low magnetic,
- 111111,
- coaxial configuration

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References(15)

References

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