Multiphysics Design of High-Power Microwave Vacuum Window

Marrese, Fabrizio; Valletti, Lorenzo; Fantauzzi, Stefano; Leggieri, Alberto; Behtouei, Mostafa; Spataro, B.; Paolo, Franco Di

doi:10.1590/2179-10742022v21i1256395

Cited by 3 publications

(1 citation statement)

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“…We presented a complete multiphysics design approach to design a window for the Ka-band klystron providing a peak power of 16MW [10] with an operating safety margin compared to 10.6 MW klystron output power. The proposed window is a pill-box type shown in figure 3a.…”

Section: Design Of a Window For The Ka-band Klystronmentioning

confidence: 99%

Studies of a Ka-band high power klystron amplifier at INFN-LNF

Behtouei

Spataro

Faillace

et al. 2023

J. Phys.: Conf. Ser.

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In the framework of the Compact Light XLS project [1], a Ka-band linearizer with electric field ranging from 100 to 150 MV/m is requested [2, 3, 4]. In order to feed this structure, a proper Ka-band high power klystron amplifier with a high efficiency is needed. This paper reports a possible solution for a klystron amplifier operating on the TM010 mode at 36 GHz, the third harmonic of the 12 GHz linac frequency, with an efficiency of 44% and 10.6 MW radiofrequency output power. We discuss also here the high-power DC gun with the related magnetic focusing system, the RF beam dynamics and finally the multiphysics analysis of a high-power microwave window for a Ka-band klystron providing 16 MW of peak power.

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Section: Design Of a Window For The Ka-band Klystronmentioning

confidence: 99%

Studies of a Ka-band high power klystron amplifier at INFN-LNF

Behtouei

Spataro

Faillace

et al. 2023

J. Phys.: Conf. Ser.

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An Innovative Lens Type FinLine to Microstrip Transition

Valletti

Fantauzzi

Paolo

2022

J Infrared Milli Terahz Waves

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Due to the disadvantages of vacuum tubes in terms of warm-up time, size, and high-voltage needs, solid-state power amplifiers (SSPAs) with gallium nitride (GaN) monolithic microwave integrated circuits (MMICs) are the key solution for power levels up to some kilowatts in continuous wave. An SSPA is the most convenient solution for these RF power levels due to its low weight, small size, negligible warm-up time, low-voltage operation, and high reliability. Spatial power amplifiers (SPAs) combining techniques are the best candidates for SSPAs due to the intrinsic low attenuation in dividing and combining functions. SPAs mainly use two types of probes: transverse and longitudinal, such as FinLines. This paper describes a broadband FinLine to microstrip (FLuS) transition based on dielectric lens theory. Comparative simulations with traditional FinLine transitions show a significant improvement in matching performances and a very significant increase in mechanical resistance of the transition. The proposed innovative FLuS uses a substrate shaping designed according to dielectric lens theory. Frequency simulations of a FLuS inside the WR22 waveguide are shown. These evidence the better performances of this transition than the classic FLuS transition using quarter-wave transformer (QWT) matching. A Q band spatial power combiner with dielectric lens FLuS was made and measured, showing the excellent performances of this innovative FLuS transition.

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