Investigation of 0.38 THz backward-wave oscillator based on slotted sine waveguide and pencil electron beam

Zhang, Luqi; Wei, Yanyu; Wang, Bing; Shen, Wenan; Xu, Jin; Gong, Yubin; Park, Gun-Sik

doi:10.1063/1.4943410

Cited by 13 publications

(3 citation statements)

References 22 publications

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“…The sine waveguide (SWG) SWS, which possesses the excellent transmission performance due to its uniform cross-section and simple energy coupling structures, has been put forward to design the THz VEDs [15][16] . Nevertheless, the longitudinal electrical eld intensity of SWG SWS is too weak, resulting in the low interaction impedance of this structure [17] . Some modi ed sine waveguides including the at-roofed sine waveguide (FRSWG) and the sine shape ridge waveguide (SSRWG) have been presented to improve the interaction impedance [18][19] , but they either destroy the uniform cross-section or make machining di culty.…”

Section: Introductionmentioning

confidence: 99%

A Piecewise Sine Waveguide for Terahertz Traveling Wave Tube

Zhang

Jiang

Lei

et al. 2022

Preprint

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In this paper, a piecewise sine waveguide (PWSWG) is proposed as the slow-wave structure (SWS) to develop high power terahertz travelling wave tube (TWT). The PWSWG evolves from a rectangular waveguide oscillating with the piecewise sine curve along its longitudinal direction. Through the analysis of slow wave characteristics and transmission properties, it can be found that the PWSWG SWS has the advantages of high interaction impedance and excellent electromagnetic transmission performance. Furthermore, the calculation results of beam-wave interaction show that the TWT based on PWSWG SWS can generate the radiated power of 251W at the typical frequency of 220GHz, corresponding to a gain of 37.01dB and an interaction efficiency of 6.8%. Compared with the conventional sine waveguide (SWG) TWTs, the PWSWG TWT has higher interaction efficiency and shorter saturation tube length. In conclusion, the PWSWG will be considered as the potential SWS for high power terahertz radiation sources.

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Section: Introductionmentioning

confidence: 99%

A Piecewise Sine Waveguide for Terahertz Traveling Wave Tube

Zhang

Jiang

Lei

et al. 2022

Preprint

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“…[7][8][9][10] Among these SWSs, the SWG which possesses the better transmission properties, lower ohmic losses and reflection has been considered as the promising SWS for Millimeter wave and terahertz TWT. [11][12][13][14] Due to its natural electron tunnel, sheet electron beam can be well applied to the SWG SWS. Earlier time, we investigated a ridge-loaded sine waveguide TWT at the G band with cylindrical electron beam and its current density is pretty large.…”

Section: Introductionmentioning

confidence: 99%

Study on W-band sheet-beam traveling-wave tube based on flat-roofed sine waveguide

Fang

Jiang

et al. 2018

AIP Advances

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Design and cold test of period-tapered double-ridge-loaded folded waveguide slow wave structure for Ka band TWTs AIP Advances 8, 055105 (2018) A W-band sheet electron beam (SEB) traveling-wave tube (TWT) based on flat-roofed sine waveguide slow-wave structure (FRSWG-SWS) is proposed. The sine wave of the metal grating is replaced by a flat-roofed sine wave around the electron beam tunnel. The slow-wave characteristics including the dispersion properties and interaction impedance have been investigated by using the eigenmode solver in the 3-D electromagnetic simulation software Ansoft HFSS. Through calculations, the FRSWG SWS possesses the larger average interaction impedance than the conventional sine waveguide (SWG) SWS in the frequency range of 86-110 GHz. The beam-wave interaction was studied and particle-in-cell simulation results show that the SEB TWT can produce output power over 120 W within the bandwidth ranging from 90 to 100 GHz, and the maximum output power is 226 W at typical frequency 94 GHz, corresponding electron efficiency of 5.89%. © 2018 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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“…More recently, output powers up to 20 W in the 186 GHz-202 GHz range [290], up to 8.05 W in the frequency range of 363.4-383.8 GHz [291], and decaying to 150 mW when the frequency is pushed up to 1.2 THz [292], have been recorded. To achieve such output powers, a BWO require voltages in the order of kV and a magnetic field reaching 1 T [34].…”

Section: Electronic Sourcesmentioning

confidence: 99%

Analysis and design of efficient passive components for the millimeter-wave and THz bands

Verdú¹,

Antonio²

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To my parents, brother and sister."Success is peace of mind which is a direct result of self-satisfaction in knowing you made the effort to become the best of which you are capable."Jonh Wooden "Lo que con mucho trabajo se adquiere, más se ama." Aristóteles AgradecimientosLa realización de esta tesis ha implicado no pocos años de trabajo y esfuerzo. Durante este importante periodo de mi vida han sido muchas las personas han estado a mi lado, brindándome su apoyo, ayuda, cariño y amor. Ya sea de una forma u otra, todas estas personas han contribuido a que este trabajo haya sido posible dando como fruto esta tesis. A todos ellos, me gustaría dedicarles un agradecimiento muy especial de todo corazón.Sin duda alguna, debo dar las gracias en primer lugar a mi director de tesis Mariano Baquero. Mariano, has sido un padre para mí profesionalmente hablando. Te conocí como alumno en las clases de Microondas, en las cuales me abriste la puerta a un conocimiento que me fascinó.Recuerdo perfectamente cuando fui a verte para preguntarte si podrías dirigirme el Proyecto Final de Carrera, y desde ese año 2009 hemos estado trabajando juntos. Quiero agradecerte no sólo haberme dado la oportunidad de trabajar en cada momento en elárea que más me ha gustado, sino el haberte preocupado por mí a nivel personal, velando siempre por mis intereses, ayudándome a desarrollarme personal y profesionalmente. Extiendo en este sentido mi agradecimiento a Miguel Ferrando. Si Mariano es el padre, tu serías sin duda el abuelo. Sin tu ayuda, la beca para la realización de esta tesis y los proyectos que han respaldado la misma no hubieran sido posibles. Tu esfuerzo ha permitido que el Grupo de Radiación Electromagnética (GRE) esté hoy dónde esta y que sus miembros nos beneficiemos de un entorno de trabajo excelente, produciendo trabajo de calidad. Debo agradecerte también tus siempre innovadoras ideas, algunas de las cuales se han convertido en una realidad plasmada en esta tesis.Una mención especial merece Daniel Sánchez. Dani, aunque tu nombre no figure como co-director bien sabes que podría estarlo. Jamás podré agradecerte lo suficiente la ayuda que me has prestado. Cuántas horas dedicadas a enseñarme en un sin fin de aspectos sin esperar nada a cambio, apoyándome también en los momentos difíciles, siempre presentes en una tesis. Bien sabes que lo mismo has hecho con cada uno tus compañeros, por eso eres el pilar del GRE Dani.Otra persona a la que estoy muy agradecido es a Vicente Boria. Tu activa colaboración en la dirección de esta tesis ha sido indispensable para la consecución de los resultados más relevantes de la misma. Sugeriste muy acertadamente una estancia en la Queen's University of Belfast, y me abriste la puerta a nuevas líneas de investigación en las cuales seguimos trabajando actualmente. Gracias por preocuparte por mi a nivel profesional y personal.En elámbito anterior, extiendo los agradecimientos a todo el GRE. It is also very important for me to acknowledge Prof. Vince Fusco. Thank you for hosting me in your group in Belfast ...

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Investigation of 0.38 THz backward-wave oscillator based on slotted sine waveguide and pencil electron beam

Cited by 13 publications

References 22 publications

A Piecewise Sine Waveguide for Terahertz Traveling Wave Tube

A Piecewise Sine Waveguide for Terahertz Traveling Wave Tube

Study on W-band sheet-beam traveling-wave tube based on flat-roofed sine waveguide

Analysis and design of efficient passive components for the millimeter-wave and THz bands

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