A multiple electron beam array for a 220 GHz amplifier

Basten, Markus; Tuček, J.; Gallagher, D.; Kreischer, K.E.; Liu, J.; Ives, L.; Manohara, Harish

doi:10.1109/ivelec.2009.5193377

Cited by 11 publications

(1 citation statement)

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“…The terahertz waves have the characteristics of strong penetrating power, wide bandwidth, low quantum energy and so on. Hence, terahertz technology is widely used in biological imaging, materials science, deep space exploration, broadband communications and other fields [1]- [4]. With the rapid development of terahertz technology, high-power terahertz radiation sources have become one of the research hotspots of terahertz science and technology.…”

Section: Introductionmentioning

confidence: 99%

Mode Competition of Low Voltage Backward Wave Oscillator near 500 GHz with Parallel Multi-Beam

Zhao,

Hu,

Zhang

et al. 2024

Chinese J. Elect.

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A backward wave oscillator with parallel multiple beams and multi-pin slow-wave structure (SWS) operating at the frequency above 500 GHz is studied. Both the cold-cavity dispersion characteristics and CST Particle Studio simulation results reveal that there are obvious mode competition problems in this kind of terahertz source. Considering that the structure of the multi-pin SWS is similar to that of two-dimensional photonic crystals, we introduce the defects of photonic crystal with the property of filtering into the SWS to suppress high-order modes. Furthermore, a detailed study of the effect of suppressing higher-order modes is carried out in the process of changing location and arrangement pattern of the point defects. The stable, single-mode operation of the terahertz source is realized. The simulation results show that the ratio of the output peak power of the higher-order modes to that of the fundamental mode is less than 1.9%. Also, the source can provide the output peak power of 44.8 mW at the frequency of 502.2 GHz in the case of low beam voltage of 4.7 kV.

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Section: Introductionmentioning

confidence: 99%

Mode Competition of Low Voltage Backward Wave Oscillator near 500 GHz with Parallel Multi-Beam

Zhao,

Hu,

Zhang

et al. 2024

Chinese J. Elect.

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Bandwidth enhancement for over-mode traveling-wave amplifiers

Jia

Yin

et al. 2022

Physics of Plasmas

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To increase the bandwidth of conventional over-mode traveling wave tubes (TWTs) with single-mode existing (SME) in an operation band, a theory on over-mode TWTs with multi-modes coexisting (MME) in the operation band is presented in this paper. To verify this theory, G-band dual-beam and shunted coupled Hughes-type coupled-cavity TWTs with MME and SME are investigated. The particle-in-cell simulation analysis confirms that, compared with SME TWT, the MME TWT can not only operate stably but also has 2.24 times bandwidth and a large increase in the output power.

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