Cascade of Two $W$ -Band Helical-Waveguide Gyro-TWTs With High Gain and Output Power: Concept and Modeling

Самсонов, С. В.; Богдашов, А. А.; Денисов, Г. Г.; Gachev, I. G.; Mishakin, S. V.

doi:10.1109/ted.2016.2646065

Cited by 42 publications

(20 citation statements)

References 26 publications

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“…The simulation of thermal distributions in the interaction circuit of the high power gyro-TWT suggested in [4] has been carried out. Since the inner surface of the structure has a complex shape, no analytic method can be employed, instead a full 3D finite element analysis has been performed.…”

Section: Results Of Simulationmentioning

confidence: 99%

“…The heat source has been calculated based on the surface current distribution obtained from the particlein-cell simulation of the gyro-TWT [4]. The current (fig.…”

Section: Results Of Simulationmentioning

confidence: 99%

“…A number of Ka-band second-harmonic operating gyro-TWTs of this type have been created during the last two decades and a record-high values of CW / average power have been achieved [2]. Presently, a great deal of effort is directed towards advancing theses devices to higher frequency bands [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The problem becomes increasingly serious for higher operating frequencies. In this work we investigate this problem for a W-band high-power gyro-TWT in the cascade of two gyro-TWTs being developed at IAP RAS [4].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thermal analysis of gyro-amplifiers with helically corrugated waveguides

Mishakin

Самсонов

2017

EPJ Web Conf.

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Section: Results Of Simulationmentioning

confidence: 99%

“…The heat source has been calculated based on the surface current distribution obtained from the particlein-cell simulation of the gyro-TWT [4]. The current (fig.…”

Section: Results Of Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal analysis of gyro-amplifiers with helically corrugated waveguides

Mishakin

Самсонов

2017

EPJ Web Conf.

Self Cite

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“…Due to the high bandwidth available there, very high resolutions can be achieved [3][4][5]. In near future, even W-band transmission powers in the range of 10 kW to 100 kW may be possible [6]. To realize a W-band radar sensor with such a high transmission power, a suitable high-power amplifier as well as an appropriate transmission line is required.…”

Section: Introductionmentioning

confidence: 99%

Design Procedure for a Broadband TE11/HE11 Mode Converter for High-Power Radar Applications

Haas

Thumm

2021

J Infrared Milli Terahz Waves

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The HE11 hybrid mode, propagating in an overmoded corrugated circular waveguide, is widely used for low loss transmission of high-power microwaves. Due to the inherent broadband frequency behaviour, this will be also essential for future broadband high-power radar applications, like space debris observation in low earth orbit (LEO). A promising amplifier concept for such radar sensors is a helical gyro-TWT. However, since the HE11 hybrid mode is not suitable for electron-beam-wave interaction in this kind of vacuum electron device, an additional mode converter is required. The present paper addresses the design procedure of a broadband high-power mode converter, designed for a helical gyro-TWT intended for future broadband high-power radar applications in the W-band. The interaction mode of the helical gyro-TWT under consideration can be easily transferred to the circular waveguide TE11 mode. Therefore, a TE11 ↦ HE11 mode converter is addressed here. The design procedure is based on a scattering matrix formalism and leads to a high HE11 mode content of ≥98.6% within the considered frequency range from 92 GHz to 100 GHz. Inside this frequency band, the mode content is even better and reaches ≈ 99.7% at ≈95 GHz. This allows broadband frequency operation of a helical gyro-TWT and is suitable for broadband high-power radar applications.

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