0.22 THz two-stage cascaded staggered double-vane traveling-wave tube

Deng, Guangsheng; Chen, Pïng; Yang, Jun; Yin, Zhiping; Ruan, Jiufu

doi:10.1007/s10825-015-0774-1

Cited by 12 publications

(6 citation statements)

References 16 publications

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“…The analytically designed parameters of unit period of the vane-loaded structure are summarized in Table 1. These parameters are compared with the parameters as reported by Deng [9] and Ryskin [10] for their 0.22-THz TWTs. The vanes are taken of rectangular shape and vanes on the opposite sides are staggered by half of the period (d=p/2) for wide bandwidth and high impedance of the vane-loaded SWS.…”

Section: βP = 25πmentioning

confidence: 99%

“…Important planar RF SWS that are recently being reported for a 0.22-THz TWT are: (i) staggered double-vane loaded rectangular waveguide SWS [6][7][8][9][10], (ii) meander line loaded rectangular waveguide SWS [11], (iii) Sine waveguide SWS [12], (iv) corrugated waveguide SWS [13], (v) H-plane and E-plane loaded rectangular waveguide SWS [14], (vi) single and double grating type SWS [15][16]. The staggered double-vane (on E-plane) loaded rectangular waveguide SWS, as shown in Fig.1 for a unit cell, is selected for the present design of a wideband 0.22 THz 100W TWT because it has wide bandwidth and high interaction impedance.…”

Section: Analytical Design Of Planar Rf Swsmentioning

confidence: 99%

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Design of a Broadband Planar RF Structure for a 0.22 THz Travelling Wave Tube

Srivastava¹,

Sharma²

2017

ujeee

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Planar broadband THz travelling wave tube is being designed for ultra broadband high speed data rate communication and imaging. A simplified analytical approach is developed for designing of a planar staggered double vane rectangular waveguide slow-wave structure (SDVSWS) for a broadband 0.22 THz 100W TWT. The structure is inherently compatible for sheet beam operation, and it is designed for an electron beam of voltage 20 kV and current 50 mA. 3D e.m. field simulator code CST-MWS was used for simulating the SDVSWS using the analytical design parameters. It is found that the dispersion characteristic by the analytical method matches well within 5% with the simulated dispersion characteristic of the structure. Effects of various parameters of a double-vane SWS on dispersion and impedance characteristics are evaluated for achieving a planar TWT of bandwidth more than 40 GHz with high gain. It is shown that pitch and vane height are most significant parameters and half-period staggering of double vanes in the structure provides wider bandwidth, high impedance and high symmetric RF electric field for efficient beam-wave interaction.

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Section: βP = 25πmentioning

confidence: 99%

Section: Analytical Design Of Planar Rf Swsmentioning

confidence: 99%

Design of a Broadband Planar RF Structure for a 0.22 THz Travelling Wave Tube

Srivastava¹,

Sharma²

2017

ujeee

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“…Приведены результаты расчета дисперсии с учетом диссипации в ряде рассмотренных структур. DOI: 10.21883/0000000000 Введение В настоящее время в ряде стран ведутся работы по созданию источников излучения (ЛБВ, ЛОВ и ряда других) на принципах вакуумной микроэлектроники в миллиметровом, субмиллиметровом и терагерцевом диапазонах [1][2][3][4][5][6][7][8][9][10][11][12][13]. Спиральные замедляющие системы (ЗС) для ЛБВ становятся все более труднореализуемыми при уменьшении длины волны, поэтому продвижение вакуумных электронных приборов в THz диапазон требует использования ЗС типа гребенка, диафрагмированного прямоугольного волновода (ПВ), петляющего ПВ (рис.…”

Section: (поступило в редакцию 22 февраля 2018 г)unclassified

“…Спиральные замедляющие системы (ЗС) для ЛБВ становятся все более труднореализуемыми при уменьшении длины волны, поэтому продвижение вакуумных электронных приборов в THz диапазон требует использования ЗС типа гребенка, диафрагмированного прямоугольного волновода (ПВ), петляющего ПВ (рис. 1) и ряда других [1], для изготовления которых применимы MEMS технологии [1][2][3][4][5][6][7][8][9][10][11][12][13]. Перспективны ЗС со сдвинутыми двойными одинаковыми гребенками в прямоугольном экране, позволяющими расширить рабочую полосу ЛБВ из-за исчезновения запрещенной зоны при фазовом сдвиге = π и слияния в этой точке прямых низшей и высшей дисперсионных ветвей (ДВ), а также и обратных ДВ [2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: (поступило в редакцию 22 февраля 2018 г)unclassified

“…Ранее такие ЗС рассчитывались приближенными методами [14,15], а также на основе методов частичных областей (ЧО) и интегральных уравнений (ИУ) [16,17]. Сейчас в основном используются коммерческие электродинамические пакеты программ, в частности HFSS [12,13,18]. Принципиально пакет HFSS позволяет учесть диссипацию, но требует значительных временных и вычислительных ресурсов, что затрудняет оптимизацию.…”

Section: (поступило в редакцию 22 февраля 2018 г)unclassified

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Замедляющая Система Двойная Сдвинутая Импедансная Гребенка"

Давидович¹

2019

Журнал Технической Физики

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Using the partial domain method, surface integral equations are obtained for slow-wave systems of double shifted combs taking dissipation on all metal surfaces into account. The case of aliquot comb periods is considered. The quadratic functionals are proposed as dispersion equations. A method to solve complex dispersion equations in the form of functionals for complex constants of propagation is proposed by means of their joint iterations with integral equations. The results of calculating the dispersion with allowance for dissipation in several structures considered are presented.

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A ridge-loaded staggered double-vane slow wave structure for terahertz radiation sources

Latif,

Wang,

Jameel

et al. 2024

Sci Rep

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A ridge-loaded staggered double-vane slow-wave structure is proposed for terahertz radiation sources employing a sheet electron beam. This slow-wave structure has the advantages of enhanced electric field and energy density distribution and improved interaction impedance in the beam-wave interaction region. High-frequency characteristics are investigated for the proposed slow wave structure and compared with those of the staggered double-vane slow wave structure. The slow wave structure is fabricated and experimentally tested for transmission and reflection properties, revealing $$S_{21}$$ above -2 dB and $$S_{11}$$ below -17 dB at 0.34 THz for a backward wave oscillator. Steady transmission of the 21.7 kV sheet electron beam is achieved by designing a periodic cusped magnetic system (0.2 T) along with a sheet electron beam gun (50 mA). Beam-wave interaction simulations utilizing 100 periods demonstrate a peak power of 14 W and continuous frequency tuning from 0.295-0.375 THz for the proposed slow wave structure, whereas the staggered double-vane slow wave structure achieves 8.5 W peak power and frequency tuning from 0.308-0.366 THz. The sensitivity of the output power to the added ridge geometry is also analyzed. These findings indicate that the novel ridge-loaded staggered double vane slow-wave structure is promising for developing high-power broad frequency tunable terahertz radiation sources.

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0.22 THz two-stage cascaded staggered double-vane traveling-wave tube

Cited by 12 publications

References 16 publications

Design of a Broadband Planar RF Structure for a 0.22 THz Travelling Wave Tube

Design of a Broadband Planar RF Structure for a 0.22 THz Travelling Wave Tube

Замедляющая Система Двойная Сдвинутая Импедансная Гребенка"

A ridge-loaded staggered double-vane slow wave structure for terahertz radiation sources

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