Study of a Wideband TE°21/TE°01 Mode Converter for Subterahertz Gyrotron Traveling-Wave Tubes

IF 1.3 4区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS IEEE Transactions on Plasma Science Pub Date : 2023-06-29 DOI:10.1109/TPS.2023.3287351

Guoxiang Shu;Xinlun Xie;Huaxing Pan;Xingxing Du;Jiacai Liao;Shaochen Ma;Jiawei Tang;Siyuan Liu;Mingze Li;Huabi Yin;Cunjun Ruan;Wenlong He

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引用次数: 1

Abstract

A novel design methodology of a TE

$^{\mathrm {\circ }}_{21}$

/TE

$^{\mathrm {\circ }}_{01}$

mode converter for gyrotron traveling-wave tubes (gyro-TWTs) is presented in this article. This type of mode converter is characterized by its broad bandwidth. The proposed mode converter consists of two-mode conversion sections (TE

$^{\mathrm {\pmb {\circ }}}_{10}$

–TE

$^{\mathrm {\pmb {\circ }}}_{20}$

and TE

$^{\mathrm {\pmb {\circ }}}_{20}$

–TE

$^{\mathrm {\circ }}_{21}$

/TE

$^{\mathrm {\circ }}_{01}$

) and an overmoded coupling section. The feeding TE

$^{\mathrm {\pmb {\circ }}}_{10}$

mode is first converted into the TE

$^{\mathrm {\pmb {\circ }}}_{20}$

mode, then coupled by using an overmoded coupling structure, and finally converted into the desired TE

$^{\mathrm {\circ }}_{21}$

/TE

$^{\mathrm {\circ }}_{01}$

mode. For verification, two

$H$

-band (220–325 GHz) back-to-back joined TE

$^{\mathrm {\circ }}_{21}$

/TE

$^{\mathrm {\circ }}_{01}$

mode converter prototypes were microfabricated and measured. The cold test showed that a measured 3-/2-dB transmission bandwidth of 58.9 GHz (235.2–294.1 GHz)/56.3 GHz (235.2–291.5 GHz) for the TE

$^{\mathrm {\circ }}_{21}$

/TE

$^{\mathrm {\circ }}_{01}$

mode converter was obtained.

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用于亚太赫兹回旋管行波管的宽带TE°21/TE°01模式转换器的研究

本文提出了一种用于回旋管行波管的TE $^{\ mathm {\circ}}_{21}$ /TE $^{\ mathm {\circ}}_{01}$模式变换器的新设计方法。这种变换器的特点是带宽宽。所提出的模式转换器由两个模式转换节(TE $^{\mathrm {\pmb {\circ}}}_{10}$ -TE $^{\mathrm {\pmb {\circ}}}_{20}$和TE $^{\mathrm {\circ}}_{20}$ -TE $^{\mathrm {\circ}}_{21}$ /TE $^{\mathrm {\circ}}_{01}$)和一个过模耦合节组成。输入的TE $^{\mathrm {\pmb {\circ}}}_{10}$模式首先转换为TE $^{\mathrm {\pmb {\circ}}}_{20}$模式，然后使用过模耦合结构进行耦合，最后转换为所需的TE $^{\mathrm {\circ}}_{21}$ /TE $^{\mathrm {\circ}}_{01}$模式。为了验证，两个$H$频段(220-325 GHz)背对背连接TE $^{\ mathm {\circ}}_{21}$ /TE $^{\ mathm {\circ}}_{01}$模式转换器原型进行了微加工和测量。冷态测试结果表明，TE $^{\ mathm {\circ}}_{21}$ /TE $^{\ mathm {\circ}}_{01}$模式变换器获得58.9 GHz (235.2 ~ 294.1 GHz)/56.3 GHz (235.2 ~ 291.5 GHz)的3-/2-dB传输带宽。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Plasma Science 物理-物理：流体与等离子体

CiteScore

3.00

自引率

20.00%

发文量

538

审稿时长

3.8 months

期刊介绍： The scope covers all aspects of the theory and application of plasma science. It includes the following areas: magnetohydrodynamics; thermionics and plasma diodes; basic plasma phenomena; gaseous electronics; microwave/plasma interaction; electron, ion, and plasma sources; space plasmas; intense electron and ion beams; laser-plasma interactions; plasma diagnostics; plasma chemistry and processing; solid-state plasmas; plasma heating; plasma for controlled fusion research; high energy density plasmas; industrial/commercial applications of plasma physics; plasma waves and instabilities; and high power microwave and submillimeter wave generation.

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