Matter and Radiation at Extremes, Volume. 1, Issue 3, 2016(2016)
Research progresses on Cherenkov and transit-time high-power microwave sources at NUDT
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%.
Get Citation
Copy Citation Text
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
Category: Review Article
Received: Nov. 3, 2015
Accepted: Mar. 29, 2016
Published Online: Jul. 9, 2020
The Author Email: Ge Xingjun (gexingjun230230@aliyun.com)