Jun Sun
Xi'an Jiaotong University
84 Papers
329 Citations
Jun Sun is an academic researcher from Xi'an Jiaotong University. The author has contributed to research in topics: Backward-wave oscillator & Microwave. The author has an hindex of 15, co-authored 75 publications.
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Papers
A high-efficiency overmoded klystron-like relativistic backward wave oscillator with low guiding magnetic field
TL;DR: In this paper, a klystron-like relativistic backward wave oscillator with a ratio of transverse dimension to free-space wavelength being about four was presented, and the particle in cell simulation results reveal that microwaves with a power of 2'GW and a frequency of 12.3 GHz are generated with an efficiency of 42% when the diode voltage is 400'kV, the beam current 12'kA, and magnetic field 0.48'T.
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A Ka-band TM02 mode relativistic backward wave oscillator with cascaded resonators
TL;DR: By combining the Cerenkov-type generator with the cascaded resonators, a Ka-band relativistic backward wave oscillator operating under the guide magnetic field 1.0 T with high power handling capability and high conversion efficiency was proposed in this paper.
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Efficient generation of multi-gigawatt power by an X-band dual-mode relativistic backward wave oscillator operating at low magnetic field
Renzhen Xiao,Yanchao Shi,Huida Wang,Guangshuai Zhang,Gui Youyou,Zhimin Song,Xianchen Bai,Yuchuan Zhang,Jun Sun +8 more
TL;DR: In this paper, an X-band dual-mode relativistic backward wave oscillator (RBWO) operating at low magnetic field is presented, where the electron beam interacts with TM01 mode and TM02 mode simultaneously, rather than with a fixed single mode.
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Experimental Study on a High-Power Subterahertz Source Generated by an Overmoded Surface Wave Oscillator With Fast Startup
TL;DR: In this paper, an experimental study on high-power subterahertz waves generated by an overmoded surface wave oscillator (SWO) is carried out, and the frequency obtained is 0.148 THz as measured by the cut-off waveguide and subharmonic heterodyne methods.
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Investigation of an improved relativistic backward wave oscillator in efficiency and power capacity
Wei Song,Changhua Chen,Jun Sun,Xiaowei Zhang,Hao Shao,Z. M. Song,Shaofei Huo,Yanchao Shi,Xiaoze Li +8 more
TL;DR: In this paper, a relativistic backward wave oscillator with high efficiency and power capacity was investigated for high power and high efficiency, where a TM021 mode resonant reflector was used to reduce the pulse shortening and increase power capacity to about 1.7 times.
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