Design and experiments of a high-order body mode generator using quasi-optical technology

1.Key Laboratory of High Power Microwave Sources and Technologies, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China;2.School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

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Supported by the National Key R&D Program of China (2017YFE0300202, 2017YFE0300200)

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    Based on the theory of open resonant cavity and quasi-optical mode conversion, a high-order quasi-optical mode generator was designed and manufactured for the cold measurement of the gyrotron oscillator. For the high-order mode generator working at 140 GHz and TE28,8 mode, the corresponding experimental measurements were completed using the three-dimensional mobile measurement platform and the network analyzer which were controlled by computer programming. The results show that, when the simulation results related to the resonant frequency, Q factor, and the correlation of the electric field distribution with the TE28,8 mode in the cavity are respectively 140.179 GHz, 855, and 90.9%, the corresponding cold-tested ones for resonant frequency and Q factor are respectively 140.155 GHz and 876, and the transverse electric field distribution tested is very similar to that of the TE28,8 mode. It indicates that the quasi-optical mode generator designed in this paper can provide an effective experimental platform for the research and design process verification of the high-order body mode gyrotron oscillator.

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YANG Chen, GUO Wei, LI Zhi-Xian, JIAO Meng-Long, ZHANG Zhi-Qiang, LUO Ji-Run, ZHU Min. Design and experiments of a high-order body mode generator using quasi-optical technology[J]. Journal of Infrared and Millimeter Waves,2021,40(6):768~777

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  • Received:February 18,2021
  • Revised:December 15,2021
  • Adopted:March 17,2021
  • Online: November 29,2021
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