Analytical Exploration of Ultrawideband Helix Slow-Wave Structures Using Multidispersion Phase Velocity Taper

Datta, S. K.; Naidu, Vemula Bhanu; Reddy, S. U. M.; Kumar, Lalit; Basu, B. N.

doi:10.1109/tps.2008.2010548

Cited by 15 publications

(4 citation statements)

References 13 publications

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“…Microstrip slow wave structure (SWS) is an optional type of SWS in miniature TWT, such as U-shaped and V-shaped microstrip meander line SWS [5]. Although the dimensions of microstrip SWS are smaller than that of the helix and coupled cavity SWS [6,7], the voltage of microstrip SWS is still relatively high. To further reduce the operation voltage, the microstrip logarithmic spiral SWS is proposed in [8].…”

Section: Introductionmentioning

confidence: 99%

Study on Silicon-Based Conformal Microstrip Angular Log-Periodic Meander Line Traveling Wave Tube

He¹,

Wang²,

Wang³

et al. 2018

PIER M

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Angular log-periodic meander line (ALPML) traveling wave tube (TWT) is one kind of low voltage miniature TWT. In order to decrease high frequency loss, avoid charge accumulation and enhance coupling impedance, the conformal microstrip ALPML TWT based on silicon substrate is proposed in this paper, which means that the projections of silicon supporting structure and metallic microstrip meander line are same in the top view. The microfabrication technology DRIE can be used to fabricate this structure. Compared with the conventional microstrip ALPML TWT, the coupling impedance of conformal microstrip ALPML TWT increases 50%. The particle-in-cell (PIC) simulation results reveal that the output power of conformal microstrip ALPML TWT can reach 220 W at 35 GHz, while the efficiency is 20%. The 3-dB bandwidth reaches 14 GHz in the frequency range between 28 GHz and 41 GHz when the operating voltage and radial sheet beam current are 3600 V and 0.3 A, respectively.

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Section: Introductionmentioning

confidence: 99%

Study on Silicon-Based Conformal Microstrip Angular Log-Periodic Meander Line Traveling Wave Tube

He¹,

Wang²,

Wang³

et al. 2018

PIER M

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“…As an important kind of vacuum electron devices, the travelling wave tube (TWT) attracts many researchers to improve its performance by developing different types of slow wave structures (SWSs) in which the beam-wave interaction takes place, to achieve higher beam-wave interaction efficiency, lower operating voltage, smaller dimension and wider bandwidth. Some frequently-used SWSs in TWTs include helix [1], coupled cavity [2], folded waveguide [3] and so on. Since small-sized solid state power amplifier is being developed fast in the millimetre-wave and terahertz waveband, which is with the properties of low operating voltage and to easily realise power combination [4][5][6][7], the development of the TWTs meet more challenges.…”

Section: Introductionmentioning

confidence: 99%

Study on phase velocity tapered microstrip angular log‐periodic meander line travelling wave tube

Xu¹,

Wang

et al. 2016

IET Microwaves, Antennas & Propagation

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To improve the efficiency of beam‐wave interaction and the gain of the microstrip angular log‐periodic meander‐line (MALPML) travelling wave tube (TWT), a modified phase velocity tapered MALPML (PVT‐MALPML) with 45° chamfer is proposed in this study. Compared with MALPML slow wave structure (SWS), the PVT‐MALPML SWS has better transmission characteristics. Meanwhile, the beam‐wave interaction simulation results show that a higher gain and electron efficiency can be produced by the PVT‐MALPML TWT. By using the novel PVT‐MALPML SWS, the properties of the radial TWT is further improved to meet the requirements of electronic system to TWTs.

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“…The conventional slow-wave structures (SWS) which contain the coupled helix structures [3], ladder [4] and folded waveguide [5] are popular used in TWTs. These conventional slow-wave structures have been researched decades of years, which possess significant advantages such as wide operating bandwidth, high efficiency and power output.…”

Section: Introductionmentioning

confidence: 99%

A novel omega-shaped microstrip slow-wave structure for 60-GHz traveling-wave tube

Liao

Wei

et al. 2013

2013 International Workshop on Microwave and Millimeter Wave Circuits and System Technology

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In this paper, a novel microstrip meander-line slow-wave structure (SWS) is proposed for using in V-band traveling-wave tube (TWT). The new omega-shaped micro strip meander-line slow-wave structure has higher interaction impedance by contrasting analysis of the conven-tional U shaped microstrip meander-line SWS. The transmission characteristics, dispersion characteristic, coupl-ing impedance and beam-wave interaction are simulated by utilizing the simulation software HFSS and CST. The calculation of beam-wave interaction indicated that, at a beam current of 0.1 A and a beam voltage of 7.1 kV, the new microstrip meander-line SWS is capable of delivering more than 28.5 W output power. And its interaction efficiency reaches 12.3% with a transient 3dB bandwidth of 5 GHz (ranging 57.5 GHz to 62.5 GHz).Index Terms -Microstrip meander-line slow-wave structure, dispersion characteristic, coupling impedance, beam-wave interaction.

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Analytical Exploration of Ultrawideband Helix Slow-Wave Structures Using Multidispersion Phase Velocity Taper

Cited by 15 publications

References 13 publications

Study on Silicon-Based Conformal Microstrip Angular Log-Periodic Meander Line Traveling Wave Tube

Study on Silicon-Based Conformal Microstrip Angular Log-Periodic Meander Line Traveling Wave Tube

Study on phase velocity tapered microstrip angular log‐periodic meander line travelling wave tube

A novel omega-shaped microstrip slow-wave structure for 60-GHz traveling-wave tube

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