Investigation of Ridge-Loaded Folded Rectangular Groove Waveguide Slow-Wave Structure for High-Power Terahertz TWT

Tian, Yanyan; Yue, Lingna; Wang, Hexin; Zhou, Qing; Wei, Yanyu; Hao, Baoliang; Wei, Yixue; Gong, Yubin

doi:10.1109/ted.2018.2798059

Cited by 17 publications

(2 citation statements)

References 13 publications

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“…Currently, the main SWSs used for TWTs at 340 GHz include the folded waveguide (FW) [ 7 , 8 , 9 ], staggered double-grating (SDG) [ 10 , 11 , 12 ], sine waveguide (SW) [ 13 , 14 , 15 ], and deformations of the above three SWSs. However, with the reduction in SWS size caused by the increase in operating frequency, the sizes of electron beam tunnels become progressively smaller, which will limit the improvement of beam current and output power; at the same time, the ohmic loss of the metal also increases, due to skin depth and fabrication accuracy.…”

Section: Introductionmentioning

confidence: 99%

A Novel Staggered Double-Segmented Grating Slow-Wave Structure for 340 GHz Traveling-Wave Tube

Wang

Zhu

Lü

et al. 2023

Sensors

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In this paper, a novel staggered double-segmented grating slow-wave structure (SDSG-SWS) is developed for wide-band high-power submillimeter wave traveling-wave tubes (TWTs). The SDSG-SWS can be considered as a combination of the sine waveguide (SW) SWS and the staggered double-grating (SDG) SWS; that is, it is obtained by introducing the rectangular geometric ridges of the SDG-SWS into the SW-SWS. Thus, the SDSG-SWS has the advantages of the wide operating band, high interaction impedance, low ohmic loss, low reflection, and ease of fabrication. The analysis for high-frequency characteristics shows that, compared with the SW-SWS, the SDSG-SWS has higher interaction impedance when their dispersions are at the same level, while the ohmic loss for the two SWSs remains basically unchanged. Furthermore, the calculation results of beam–wave interaction show that the output power is above 16.4 W for the TWT using the SDSG-SWS in the range of 316 GHz–405 GHz with a maximum power of 32.8 W occurring at 340 GHz, whose corresponding maximum electron efficiency is 2.84%, when the operating voltage is 19.2 kV and the current is 60 mA.

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Section: Introductionmentioning

confidence: 99%

A Novel Staggered Double-Segmented Grating Slow-Wave Structure for 340 GHz Traveling-Wave Tube

Wang

Zhu

Lü

et al. 2023

Sensors

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“…This results in constantly expanding demand of micro-grooves with high aspect ratio (HAR). 1 The machined quality of high precision micro-grooves is responsible for the life length of the micro-components. However, the fabrication of such micro-grooves is highly tricky due to the small dimensions, high machined precision, and superior surface quality.…”

Section: Introductionmentioning

confidence: 99%

Investigation on micro-milling of micro-grooves with high aspect ratio and laser deburring

Yang

Han

Hao

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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High aspect ratio micro-grooves are critical structures in the micro-electromechanical system. However, problems like rapid tool wear, low processing efficiency, and inferior machined quality in micro-milling of high aspect ratio micro-grooves by length–diameter ratio tools are particularly significant. In this work, a combined micro-milling method based on water-free alcohol as the cutting fluid and laser deburring is proposed to investigate the high aspect ratio micro-groove generation of oxygen-free high-conductivity copper TU1. Parametric experiments and high aspect ratio micro-groove experiments were conducted to investigate the surface quality, cutting forces, and tool wear. The water-free alcohol was employed to improve the tool life and machined surface quality. In the case of the oxygen-free high-conductivity copper TU1 material, a satisfactory high aspect ratio micro-groove (groove-width = 0.2 μm and aspect ratio = 2.5) with a nanoscale surface roughness ( Ra = 68 nm) was obtained under the preferred machining conditions. Furthermore, the deburring process of the high aspect ratio micro-groove by the laser technology was conducted to achieve ideal machined quality of the top surfaces.

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Fabrication of slow-wave structure by picosecond laser hybridizing with micro-milling

Hao,

Wan,

et al. 2025

Journal of Manufacturing Processes

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Investigation of Ridge-Loaded Folded Rectangular Groove Waveguide Slow-Wave Structure for High-Power Terahertz TWT

Cited by 17 publications

References 13 publications

A Novel Staggered Double-Segmented Grating Slow-Wave Structure for 340 GHz Traveling-Wave Tube

A Novel Staggered Double-Segmented Grating Slow-Wave Structure for 340 GHz Traveling-Wave Tube

Investigation on micro-milling of micro-grooves with high aspect ratio and laser deburring

Fabrication of slow-wave structure by picosecond laser hybridizing with micro-milling

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