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A Water-Based Lossy Waveguide With High Attenuation Used in High Power Gyro-TWT

Insufficient attenuation and poor heat dissipation in the beam-wave interaction section are critical limitations in developing the megawatt-level gyrotron traveling wave tube (gyro-TWT). To solve these problems, we propose a water-based lossy waveguide with high attenuation and heat dissipation in t...

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Published in:	IEEE electron device letters 2024-07, Vol.45 (7), p.1325-1328
Main Authors:	Wang, Weijie, Cao, Yingjian, Liu, Guo, Yao, Yelei, Jiang, Wei, Wang, Jianxun, Luo, Yong
Format:	Article
Language:	English
Subjects:	Attenuation Ceramics dielectric Dielectric losses Dissipation gyrotron travelling wave tube (gyro-TWT) heat dissipation high loss Microwave antennas Permittivity Temperature measurement Thermal conductivity Traveling wave tubes Traveling waves Water-based Wave interaction Waveguides
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cites	cdi_FETCH-LOGICAL-c175t-70cecbebb591140c05eea8f3253a47806854d67ffdf9cdcb88e567a0b4999f7b3
container_end_page	1328
container_issue	7
container_start_page	1325
container_title	IEEE electron device letters
container_volume	45
creator	Wang, Weijie Cao, Yingjian Liu, Guo Yao, Yelei Jiang, Wei Wang, Jianxun Luo, Yong
description	Insufficient attenuation and poor heat dissipation in the beam-wave interaction section are critical limitations in developing the megawatt-level gyrotron traveling wave tube (gyro-TWT). To solve these problems, we propose a water-based lossy waveguide with high attenuation and heat dissipation in this letter. It comprises a vacuum region, a lossless BeO ceramic, and flowing water. Measured results indicate that the proposed structure can achieve an attenuation higher than 10dB/cm at 15.5-17.0GHz. The maximum attenuation at 16.3GHz can even exceed 29dB/cm. It is sufficient to suppress oscillations at large currents. In addition, the flowing water has a higher power capacity than conventional lossy dielectric. The proposed structure paves the way for the development of megawatt gyro-TWTs.
doi_str_mv	10.1109/LED.2024.3406706
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subjects	Attenuation Ceramics dielectric Dielectric losses Dissipation gyrotron travelling wave tube (gyro-TWT) heat dissipation high loss Microwave antennas Permittivity Temperature measurement Thermal conductivity Traveling wave tubes Traveling waves Water-based Wave interaction Waveguides
title	A Water-Based Lossy Waveguide With High Attenuation Used in High Power Gyro-TWT
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