140 GHz回旋管高转换效率准光模式变换器设计研究
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1.北京化工大学 信息科学与技术学院,北京 100029;2.北京真空电子科技有限公司 微波电真空器件国家级重点实验室,北京 100015;3.北京航空航天大学 电子信息工程学院,北京 100191

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O43

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On the design of high conversion efficiency quasi-optical mode converter for 140 GHz high-power gyrotron applications
Author:
Affiliation:

1.College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;2.National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing 100015, China;3.School of Electronic Information Engineering, Beihang University, Beijing 100191, China

Fund Project:

Supported by the Aeronautical Science Foundation of China(202000180S9001), and Fundamental Research Funds for the Central Universities(buctrc201931)

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    摘要:

    成功实现高转换效率的140 GHz TE22,6准光模式变换器原型设计。基于周期微扰原理设计Denisov辐射器,实现低边缘绕射的初级出射波束。针对三镜面光路系统,采用全矢物理光学积分作为主要计算手段,围绕主极化场分量进行三级相位修正面迭代优化,实现高出射高斯纯度的模式场转换,其中一级镜的修正有效改善了辐射器出射的不理想性。基于全矢数值仿真确认,相比原二次曲面原型设计,相位修正后的变换器系统的出射高斯纯度从92.7%提高到99.6%,结合98.8%以上的功率传递效率,实现了性能优越的高阶回旋管准光模式变换器原型设计。

    Abstract:

    A high conversion efficiency quasi-optical mode converter prototype is designed for 140 GHz TE22,6 applications. The Denisov launcher is designed based on the periodic perturbation concept, leading to primary radiation field with low edge diffraction. Full-vector physical optics integration solver is used to model and analyze the 3-mirror system. And the 3-mirror iterative phase correction is applied based on the co-polarization field component, so as to achieve high-quality mode conversion. Specifically, the correction of the 1st mirror sufficiently refines the non-ideal radiated fields from the launcher. It is then validated by numerical investigations that, comparing to the original quaritic mirrors, the phase-shaped mirror system leads to excellent conversion performance. The Gaussian content (ηv) of the output fields rises from 92.7% to 99.6%, while the power transmission efficiency (ηp) reaches 98.8%.

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金铭,王丹阳,张亦弛,韩宇南,白明.140 GHz回旋管高转换效率准光模式变换器设计研究[J].红外与毫米波学报,2023,42(2):234~240]. JIN Ming, WANG Dan-Yang, ZHANG Yi-Chi, HAN Yu-Nan, BAI Ming. On the design of high conversion efficiency quasi-optical mode converter for 140 GHz high-power gyrotron applications[J]. J. Infrared Millim. Waves,2023,42(2):234~240.]

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  • 收稿日期:2022-08-30
  • 最后修改日期:2023-03-14
  • 录用日期:2022-11-15
  • 在线发布日期: 2023-03-07
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