Microwave tubes and applications

Basu, B. N.; Datta, S. K.

doi:10.1080/09205071.2017.1375646

Cited by 11 publications

(2 citation statements)

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“…Under the impetus of scientific and technological progress and practical applications, klystrons are developing towards high power, high efficiency, high gain, miniaturization, high reliability, and long lifetime [51][52][53]. In recent years, the development of MTM klystrons has provided a new design idea for exploring higher performance.…”

Section: Prospects and Challengesmentioning

confidence: 99%

“…Klystrons are widely used in the military and civilian fields, such as high power radars, particle accelerators, radio-astronomy, industrial heating, medical imaging, etc., owing to their high power, high efficiency, high gain, and low phase noise [51][52][53][54][55]. With the development of science and technology, the higher performance klystrons are required to meet the application requirements in basic scientific facilities [56][57][58].…”

Section: Introductionmentioning

confidence: 99%

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Recent advances in metamaterial klystrons

Wang

Tang

et al. 2021

EPJ Appl. Metamat.

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As a kind of artificially structured media, electromagnetic metamaterials (MTMs) have exotic electromagnetic properties that are not found or difficult to achieve in natural materials. This class of metal/dielectric-structured artificial media has attracted great attention during the past two decades and made important breakthroughs. A variety of passive and active devices based on MTMs have been developed rapidly. Especially MTM klystrons, which show very remarkable advantages, including miniaturization, high gain, and high efficiency in the microwave band. MTM extended interaction klystrons creatively combine the advantages of MTMs, extended interaction technology, and klystrons. It provides a new design idea for the development of brand-new klystrons with high performance. In this review paper, we report the recent advances in MTM klystrons including MTM extended interaction oscillator and MTM extended interaction klystron amplifier. Furthermore, the prospects and challenges of MTM klystrons are discussed. Finally, the development trend is concluded.

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Section: Prospects and Challengesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent advances in metamaterial klystrons

Wang

Tang

et al. 2021

EPJ Appl. Metamat.

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Analysis of the high-frequency characteristics of a sine waveguide

Lei,

Xing,

et al. 2023

AIP Advances

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Based on the double-periodic characteristics of a sine waveguide, the dispersion equation, interaction impedance, and transmission losses of slow-wave structures are derived. The dispersion equation indicates that the waves propagating in the sine waveguide should belong to two mode types, which can exist independently rather than as “pseudo-modes.” The dispersion equation, interaction impedance, and transmission losses are obtained using a theoretical model. A 220 GHz traveling wave tube (TWT) is used as an illustrative example to verify the validity of the analytical model. The calculated results show that the dispersion curve is in good agreement with that given by the Ansys high-frequency simulation software over the entire frequency range and that the theoretical numerical calculation time is less than 2% of that of the Ansys software package. In addition, the results demonstrate that the interaction impedance of the symmetric φ0 + π mode is much higher than that of the asymmetric φ0 mode. Therefore, the symmetric φ0 + π mode should be used for propagation in sine waveguide traveling-wave tubes. Moreover, when the conductivity is set at 1.6 × 107 S/m, the loss of the sine waveguide is ∼1.15 dB/cm for 220 GHz. The equivalent conductivity of the metal can be used appropriately in the design of the mm-wave and the THz TWT.

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