Demonstration of a Pulsed G-Band 50-W Traveling Wave Tube

“…For example, power of several hundred watts can be the achieved by the W-band traveling wave tubes [30,31,32]. However, at G-band, they will decrease to only about 20W (continuous wave, CW)[33] or a peak power of 50W [34].…”

Section: Terahertz Higher-order Mode Devicementioning

confidence: 99%

The Research Advance on Planar Multibeam Extended Interaction Circuit

2022

JRSE

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In order to meet the application requirements, the operating frequency of vacuum electronic devices has been pushed up to Terahertz band, which has become an important technical approach to develop high-power radiation sources. With the rapid development of terahertz science and technology, new vacuum electronic devices based on distributed beam technology and extended interaction technology are promising. Distributed beam technology includes planar multibeam array and sheet beam. The former refers to multiple circular beams with coplanar linear arrangement. Compared with the sheet beam, the planar multibeam extended interaction circuit can not only obtain the same high output power, but also has additional advantages, such as low conductivity and weak cavity coupling etc. As a new type of vacuum electronic device, planar multibeam extended interaction device has potential technical advantages in high power, high gain, high efficiency and miniaturization.In the paper, the key technical characteristics of planar multibeam extended interaction circuit are analyzed. The research progress and future trends have been stated in three aspects: coplanar multibeam technology with linear arrangement, extended interaction technology and planar multibeam higher-order mode devices.

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“…Gband TWTs with over 50 W output power have been developed, but these devices require high input power and employ bulky, uniform, permanent magnets [10,11]. Compared with those devices, PPM-focused G-band TWTs provide lower power but have advantages regarding volume and weight [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…As the crucial part of a TWT, the SWS largely determines the amplifier's performance. The FWG SWS has been widely used in THz TWTs, and it is capable of high-power wideband performance and proves less sensitive to fabrication uncertainties [12][13][14][15][16]. As an improvement of the FWG SWS, the FWG SWS with modified circular bends has the advantages of higher coupling impedance and sideband stability [17].…”

Section: Introductionmentioning

confidence: 99%

A 237 GHz Traveling Wave Tube for Cloud Radar

Liu¹,

Pan²,

Song³

et al. 2023

Electronics

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In this article, the first 237 GHz traveling wave tube (TWT) is presented as a high-power amplifier for the terahertz (THz) cloud radar. As is common with previous G-band traveling wave tubes developed at Beijing Vacuum Electronics Research Institute, the 237 GHz traveling wave tube employs a 20 kV, 50 mA pencil electron beam focused using periodic permanent magnets (PPMs) to achieve compactness. A folded waveguide (FWG) slow-wave structure (SWS) with modified circular bends is optimized to provide high impedance and eliminate sideband oscillations. Limited by insufficient drive power, this device is not saturated. The measured maximum output power and gain are 8.9 W and 35.7 dB, and the 3 dB gain bandwidth achieves 4 GHz.

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Demonstration of a Pulsed G-Band 50-W Traveling Wave Tube

Cited by 40 publications

References 14 publications

A high-performance Ti₃C₂T_x/Lu₂O₃/GaN heterojunction deep ultraviolet photovoltaic photodetector enhanced via the dual-field coupling effect

A high-performance Ti₃C₂T_x/Lu₂O₃/GaN heterojunction deep ultraviolet photovoltaic photodetector enhanced via the dual-field coupling effect

The Research Advance on Planar Multibeam Extended Interaction Circuit

A 237 GHz Traveling Wave Tube for Cloud Radar

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Demonstration of a Pulsed G-Band 50-W Traveling Wave Tube

Cited by 40 publications

References 14 publications

A high-performance Ti3C2Tx/Lu2O3/GaN heterojunction deep ultraviolet photovoltaic photodetector enhanced via the dual-field coupling effect

A high-performance Ti3C2Tx/Lu2O3/GaN heterojunction deep ultraviolet photovoltaic photodetector enhanced via the dual-field coupling effect

The Research Advance on Planar Multibeam Extended Interaction Circuit

A 237 GHz Traveling Wave Tube for Cloud Radar

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Resources

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A high-performance Ti₃C₂T_x/Lu₂O₃/GaN heterojunction deep ultraviolet photovoltaic photodetector enhanced via the dual-field coupling effect

A high-performance Ti₃C₂T_x/Lu₂O₃/GaN heterojunction deep ultraviolet photovoltaic photodetector enhanced via the dual-field coupling effect