Study of superradiance based on a low-voltage backward wave oscillator

Wu, Jie; Zhi-cong, Fang; Xie, Hong-Quan; Li, Zhenghong

doi:10.1088/1674-1137/37/4/047002

Cited by 1 publication

(1 citation statement)

References 7 publications

(7 reference statements)

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“…In recent years, there have been many research reports in this area. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] A transit-time oscillator (TTO) is a type of HPM source that has the potential to be miniaturized and compact due to its simple structure, which can work efficiently with a low external guiding magnetic field. This kind of device has attracted increasing interest from researchers.…”

Section: Introductionmentioning

confidence: 99%

Experimental research based on a C-band compact transit-time oscillator with a novel diode loading an embedded soft magnetic material and shielding structure

Ling

et al. 2023

Chinese Phys. B

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In order to reduce the external magnetic field and improve the conversion efficiency of high-power microwave generation devices with low external magnetic field, a novel diode with embedded soft magnetic and shielding structure is proposed. The soft magnetic material is designed to enhance the local magnetic field in the diode region. Besides, the diode applies a shielding structure which can reduce the radial electric field. From simulation research, it is found that the emission and transmission quality of the electron beam with low magnetic field is greatly improved when loading this diode. Through simulation research, it is verified that the diode can increase the conversion efficiency of the TTO from 30% to 36.7%. In our experimental study, under the conditions of a diode voltage of 540kV and a current of 10.5kA, the output microwave power is 1.51GW when loading the novel diode and the microwave frequency is 4.27GHz when an external guiding magnetic field of 0.3T is applied. The corresponding conversion efficiency is improved from 20.0% to 26.6%, which is 6.6% higher than the device loaded with a conventional diode. Our experiments have verified that this novel diode can effectively improve the conversion efficiency of high-power microwave sources operating with low magnetic field, and contribute to the miniaturization and compactness of high-power microwaves.

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