Dr. Yelei Yao
School of Eletronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
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Academic Career Length
10Years (2017-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications10 May 2021 in IEEE Electron Device Letters
Journal Article
JWJianxun Wang
Jianxun WangYWYixin Wan
Yixin WanXLXinjie Li
Xinjie LiQLQiang Liu
Qiang LiuHLHao Li
Hao LiYLYong Luo
Yong Luo
+7
To meet the need to transmit increasingly massive volumes of data, a more than 3 kW continuous wave (CW) Ka-band sheet beam traveling-wave tube (SB-TWT) is reported for the first time. Working under unsaturated drive, the maximum gain obtained is 29 dB with a sheet beam of 30.9 kV, 0.82 A, and the efficiency exceeds 24% with a single-stage collector depressed to −15 kV. The 1-dB bandwidth reaches 6 GHz from 26 GHz to 32 GHz and the bandwidth with output power greater than 2 kW can even reach 7GHz from 26 GHz to 33 GHz. The realization of 99.8% static transmission as well as over 97% actual CW transmission of sheet beam is verified successfully, which benefits from adopting periodic cusp magnet (PCM) focusing, and thereby total weight is less than 15 kg. The relevant experimental details are introduced in this letter.
20 April 2022 in IEEE Electron Device Letters
Journal Article
Guo Liu
Wei JiangYelei YaoYWYu Wang
Yu Wang
Weijie WangYLYong Luo
Yong Luo
+2
Recent hot test details and inspiring results of the W-band lossy-dielectric-loaded gyrotron traveling-wave tube (gyro-TWT) developed at the University Electronic Science and Technology of China (UESTC) are reported in this letter. Measurement of the gyro-TWT had achieved a pulse output power over 100 kW with a broad bandwidth of 8.5 GHz (92.0~100.5 GHz). For the first time as we know, the W-band gyro-TWT can stably operate with a 10% duty cycle and the average output power is over 10.3 kW in the frequency range. Excellent stability, pure spectrum and mode patterns are all verified in the hot test experiment.
9 March 2020 in IEEE Electron Device Letters
Journal Article
YXYong Xu
Yong XuYMYa Mao
Ya Mao
Weijie WangYLYong Luo
Yong Luo
JWJ. X. Wang
J. X. WangHLHongfu Li
Hongfu Li
+4
In this letter, a 20-kW-average-power Ka-band TE01 mode gyro-traveling wave tube (gyro-TWT) with a cut-off waveguide section is presented and verified by hot test experiment for the first time. To improve the average output power, the new type gyro-TWT adds a cut-off waveguide in high frequency beam-wave interaction circuits. The large signal nonlinear theory calculations and particle in cell (PIC) simulations show that the new type gyro-TWT has broadband and high-power output performances. The hot test experiment shows that the measured maximum average power is 20.3 kW at 34 GHz, corresponding to a saturated peak power of 169.2 kW, a saturated gain of 52 dB, an efficiency of ~26.9%, and 3 dB bandwidth of 3.2 GHz.
6 March 2017 in Journal of Infrared, Millimeter, and Terahertz Waves
Journal Article
JWJianxun Wang
Jianxun WangXRXuxun Ren
Xuxun RenQTQizhi Tian
Qizhi TianLYLiya Yang
Liya YangYelei YaoYLYong Luo
Yong Luo1 December 2022 in IEEE Electron Device Letters
Journal Article
JWJianxun Wang
Jianxun WangYWYixin Wan
Yixin WanDXDaqing Xu
Daqing XuXLXinjie Li
Xinjie LiZDZihao Dai
Zihao Dai
YLYong Luo
Yong Luo
+5
In response to the urgent requirement for a high-power millimeter-wave system with small size, low cost, and excellent maneuverability in W-band, a compact high average power sheet beam extended interaction oscillator (SB-EIO) based on periodic cusp magnet (PCM) is designed, fabricated, hot tested and reliability verified. The maximum output power is 10.2 kW at a working duty of 1%. When the duty is increased to 27%, an average power of 2.2 kW is achieved, corresponding to a $400 \mu \text{s}$ pulse and 675 Hz repetition frequency. The device can be repeatedly turned on and off quickly during a 6-minute operating time and the single longest running time exceeds 60 min. The 96.0% transmission rate of the sheet beam (45.5 kV, 2.49 A) is verified. The overall weight of SB-EIO including the magnet and external package is less than 10 kg, which is ideal for equipping movable platforms.
10 March 2023 in IEEE Electron Device Letters
Journal Article
Guo LiuWei JiangYelei YaoYWYu Wang
Yu WangYCYingjian Cao
Yingjian CaoYLYong Luo
Yong Luo
+1
In this letter, we reported a gyrotron traveling wave tube (gyro-TWT) featured broadband and high power at the University Electronic Science and Technology of China (UESTC), which had achieved a long pulse width up to 2 ms and a maximum duty cycle of up to 40%. Two typical operation states, i.e. high voltage/current (60.5 kV/9.0 A) and low voltage/current (46 kV/2.6~2.9 A), are respectively hot tested for high pulse and average power. With a duty cycle of 40%, the measured maximum average power is up to 20.1 kW.
About Me
I am currently an Associate Researcher at the School of Electronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), a position I have held since June 2019. I earned both my Bachelor’s (2013) and Ph.D. (2019) degrees in Electronic Science and Technology from UESTC, I am also honored to serve as an IEEE Senior Member. My research focuses on high-power microwave/millimeter-wave/THz sources for communication, imaging sensing, and energy applications. I am particularly interested in wave propagation and its interaction with electron beams, exploring this through theoretical modeling, computational tools, simulations, and experimental testing. Additionally, I investigate passive components and subsystems essential to high-frequency systems, including mode converters, metamaterial-based structures, advanced filtering techniques, and antenna technologies.