Xingqun Zhao
Southeast University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Xingqun Zhao.
international vacuum electronics conference | 2011
Xingqun Zhao; Pu Wei; Ningfeng Bai; Shilu Zhao; Yanmei Wang; Tiechang Yan; Xiaohan Sun
The paper describes simulation result of traveling wave tube(TWT) body temperature, and establishes a temperature measurement system based on the fiber bragg grating(FBG) sensor array. By quasi-distributed FBG sensing, the system can measure TWT body temperature distribution accurately.
international vacuum electronics conference | 2012
Ningfeng Bai; Hehong Fan; Xingqun Zhao; Jinjun Feng; Fujiang Liao; Xiaohan Sun
Novel dual-square electromagnetic band gap (EBG) substrate is investigated to improve the performance of planar microstrip meander line travelling-wave tube (MML-TWT). According to the simulation results, this EBG structure can improve coupling impedance double and extend bandwidth from 9.5GHz to 10.5GHz. This structure also can be fabricated in one-dimensional for the MML-TWT. In other words, it has same transverse dimension of MML-TWT, which is important to fabricate the planar travelling wave tube.
international vacuum electronics conference | 2016
Huiyu Yuan; Jin Zhang; Jun Zhou; Xing Sheng; Ningfeng Bai; Hehong Fan; Xingqun Zhao; Xiaohan Sun
We performed an experiment demonstration for verifying the measurement method based on Rayleigh scattering to test the residual gas in a storing vacuum electronic devices (VED), using high pulse power ultraviolet laser and CCD detector. The normalized intensities of scattered light are obtained before and after degassing the test tube. The experimental results validate the measurement method we proposed before.
international vacuum electronics conference | 2015
Xingqun Zhao; Yiwen Lin; Xiaohan Sun; Dongya Lv; Yanmei Wang; Bo Chen; Jinjun Feng; Tiechang Yan
A testing-based estimation method for inner temperature distribution of collector and output terminal is proposed without placing temperature sensors inside the traveling wave tube. The inner temperature distribution is estimated based on testing body temperatures, with an iteration solving the thermodynamic parameters of the thermal model. The results indicated that the method has good feasibility and accuracy.
international vacuum electronics conference | 2013
Xiaolian Shi; Hehong Fan; Fangfang Song; Xingqun Zhao; Suiren Wan; Xiaohan Sun
Simulation of M-type cathode performance degradation is studied based on ion bombardment with interdiffusion effect considered. Sputtered volume, sputter distribution and ion spot occurrence time can be estimated, with estimated sputtered volume close to former researches. For M-type Re-coated cathode with 300nm-thick film, ion spots were estimated to appear after 2.06×105 hs working.
international vacuum electronics conference | 2011
Xingqun Zhao; Suiren Wan; Yixue Wei; Ningfeng Bai; Shilu Zhao; Tiechang Yan; Xiaohan Sun
The thermal condition of slow-wave structure is very important to the normal and stable work of the space traveling wave tube. This paper theoretically analyzes dynamic response of helical slow-wave structure, and simulates it with the help of ANSYS., The dynamic response of temperature under different pulse duration and duty cycle is acquired through analysis and simulation.
international vacuum electronics conference | 2010
Ningfeng Bai; Hehong Fan; Xingqun Zhao; Fujiang Liao; Jinjun Feng; Xiaohan Sun
A high space resolution platform has been built to measure the cold test parameters of Electromagnetic Band Gap (EBG) waveguide. The space resolution of this platform can be reached to 4µm and controlled by FPGA and computer through LABVIEW. An EBG waveguide is fabricated for measurement. The mode field of cross section and propagate constants have been simulated by our coding and tested by this platform‥
international vacuum electronics conference | 2009
Ningfeng Bai; Ming Xue; Xingqun Zhao; Chao Pan; Fujiang Liao; Xiaohan Sun
An Electromagnetic Band Gap Structures (EBGS) has been used in the Microstrip Meander-Line Slow Wave Structures (MML-SWSs) in order to improve their performance. The EBGSs can be used as the substrates to support the MML-SWSs, which replace the ceramic substrates in traditional ones. The simulation results show that the minimum loss of the MML-SWSs used EBGS is half of the traditional one.
Archive | 2009
Xingqun Zhao; Xiaohan Sun; Qing Chen; Pu Wei; Dong Ding; Enrun Wei; Hongwei Feng
Archive | 2008
Suiren Wan; Hang Su; Xiaohan Sun; Xingqun Zhao; Enrun Wei; Hongwei Feng; Qiang Yin