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  • Received: Nov. 3, 2015

    Accepted: Mar. 29, 2016

    Posted: Mar. 1, 2016

    Published Online: Jul. 9, 2020

    The Author Email: Ge Xingjun (gexingjun230230@aliyun.com)

    DOI: 10.1016/j.mre.2016.04.001

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    Jiande Zhang, Xingjun Ge, Jun Zhang, Juntao He, Yuwei Fan, Zhiqiang Li, Zhenxing Jin, Liang Gao, Junpu Ling, Zumin Qi. Research progresses on Cherenkov and transit-time high-power microwave sources at NUDT[J]. Matter and Radiation at Extremes, 2016, 1(3): 2016

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Matter and Radiation at Extremes, Vol. 1, Issue 3, 2016 (2016)

Research progresses on Cherenkov and transit-time high-power microwave sources at NUDT

Jiande Zhang, Xingjun Ge*, Jun Zhang, Juntao He, Yuwei Fan, Zhiqiang Li, Zhenxing Jin, Liang Gao, Junpu Ling, and Zumin Qi

Author Affiliations

  • Laboratory of High Power Microwave Technology, National University of Defense Technology, Changsha, People's Republic of China 410073

Abstract

Research progresses on Cherenkov and transit-time high-power microwave (HPM) sources in National University of Defense Technology (NUDT) of China are presented. The research issues are focused on the following aspects. The pulse-shortening phenomenon in O-type Cerenkov HPM devices is suppressed. The compact coaxial relativistic backward-wave oscillators (RBWOs) at low bands are developed. The power efficiency in M-Type HPM tubes without guiding magnetic field increased. The power capacities and power efficiencies in the triaxial klystron amplifier (TKA) and relativistic transit-time oscillator (TTO) at higher frequencies increased. In experiments, some exciting results were obtained. The X-band source generated 2 GW microwave power with a pulse duration of 110 ns in 30 Hz repetition mode. Both L- and P-band compact RBWOs generated over 2 GW microwave power with a power efficiency of over 30%. There is approximately a 75% decline of the volume compared with that of conventional RBWO under the same power capacity conditions. A 1.755 GHz MILO produced 3.1 GW microwave power with power efficiency of 10.4%. A 9.37 GHz TKA produced the 240 MW microwave power with the gain of 34 dB. A 14.3 GHz TTO produced 1 GW microwave power with power efficiency of 20%.

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