Modeling Investigation of an Ultrawideband Terahertz Sheet Beam Traveling-Wave Tube Amplifier Circuit

Shin, Youngmin; Baig, Anisullah; Barnett, Larry R.; Luhmann, Neville C.; Pasour, John; Larsen, Paul B.

doi:10.1109/ted.2011.2159842

Cited by 86 publications

(21 citation statements)

References 17 publications

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“…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%

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: 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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“…Previously reported the THz SWCs, staggered double vane [3], sine waveguide [4], trapezoidally corrugated [5], single corrugated [2], and double corrugated [6], are based on E-plane metal loaded rectangular waveguide to slow down the longitudinal electric field interacting with the electron beam.…”

Section: Introductionmentioning

confidence: 99%

Novel rectangular slow-wave circuit for THz traveling wave tubes

Billa

Akram

Chen

2015

2015 8th UK, Europe, China Millimeter Waves and THz Technology Workshop (UCMMT)

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We are presenting a novel miniaturized rectangular Slow-Wave Circuit for sub-millimetre or terahertz vacuum electron traveling wave tube devices. In order to increase the gain of traveling wave tube amplifier at moderate bandwidth, an Hplane metal load is incorporated in addition to an E-plane metal load in a rectangular waveguide. This proposed circuit has been investigated at 400 GHz central frequency using CST studio suite for both the cold circuit parameters and the beam-wave interaction analysis.

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“…Such considerations lead to an effort by the UCD to develop a prototype of i/o coupler with utmost 34% 1 dB bandwidth [6]- [8]. By adopting cutoff connector to prevent electromagnetic (EM) wave from transmitting into electron collector, the i/o structures have already got a lower insertion loss and the reflected EM energy has been reduced to an acceptable degree.…”

Section: Introductionmentioning

confidence: 99%

Extremely Broad Bandwidth Input/Output Coupling Structure Design for a <inline-formula> <tex-math notation="TeX">\(Q\) </tex-math></inline-formula>-Band Sheet-Beam Traveling-Wave Tube

Zheng

Wang

Luo

2014

IEEE Trans. Plasma Sci.

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In this paper, a new type input/output (i/o) structure, adopting the multiaperture coupler, for broadband sheet-beam traveling-wave tube was designed and analyzed. This novel coupling structure not only can get a larger electron passway, which will greatly benefit the transmission of the electron beam, without deteriorating electromagnetic transmission characteristics, but also work over an extremely broad bandwidth. The transmission characteristics of this coupling i/o structure are investigated by Ansoft's high-frequency structure simulator (HFSS). Operating at TE 10 mode, the maximum insertion loss and isolation of the i/o structure over 36-52 GHz, which equals to 36.4% bandwidth, are −25 and −20 dB, the transmission coefficient is above −0.3 dB. The results of HFSS were verified by Computer Simulation Technology Microwave Studio.Index Terms-Extremely broadband, input/output (i/o) structure, multiaperture coupler, sheet-beam traveling wave tube (SB-TWT). in 2010, where he is currently pursuing the Ph.D. degree.His current research interests include high-power millimeter-wave devices, including SB-TWT and SB-klystron.Jianxun Wang received the M.S. degree in physical electronics from the

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Modeling Investigation of an Ultrawideband Terahertz Sheet Beam Traveling-Wave Tube Amplifier Circuit

Cited by 86 publications

References 17 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

Novel rectangular slow-wave circuit for THz traveling wave tubes

Extremely Broad Bandwidth Input/Output Coupling Structure Design for a <inline-formula> <tex-math notation="TeX">\(Q\) </tex-math></inline-formula>-Band Sheet-Beam Traveling-Wave Tube

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