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Radiation Input/Output System in a Ten-Barrel W-Band Gyrotron-Type Traveling-Wave Tube with Helically Corrugated Waveguides

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Radiophysics and Quantum Electronics Aims and scope

We present a version of the radiation input/output system with polarization division of signals and a single oversized window developed for a modification of the gyrotron-type traveling-wave tube (gyro-TWT) with ten helically corugated parallel waveguides, which was proposed earlier and, according to calculations, allows achieveing a pulse power of 200–400 kW in the frequency band 92–98 GHz. The key element of this system is the waveguide converter transforming the TE modes, which escape from each barrel, to a common linearly polarized quasioptical wave beam being a mixture of LP5, n modes of the corrugated waveguide. Spatial separation of the electron beam and microwave radiation takes place at the waveguide discontinuity of the collector insulated from the tube body. The radiation is injected into and ejected from the gyro-TWT via one oversized window. The input and output signals are divided spatially with respect to their polarization on an array of linear conductors. It is shown that using this system and a certain set of external quasioptical mirrors, one can ensure transformation of the output radiation of a gyro-TWT to the mode of an external transmission line (the HE mode of the corrugated waveguide or the TEM mode of the mirror line) with diffraction losses of about 3–4% at the bandwidth center and 12–15%, at its edges.

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Authors and Affiliations

  1. Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia

    A. A. Bogdashov & S. V. Samsonov

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  1. A. A. Bogdashov
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  2. S. V. Samsonov
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Correspondence to A. A. Bogdashov.

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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 65, Nos. 5–6, pp. 370–381, May–June 2022. Russian DOI: https://doi.org/10.52452/00213462_2022_65_05_370

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Bogdashov, A.A., Samsonov, S.V. Radiation Input/Output System in a Ten-Barrel W-Band Gyrotron-Type Traveling-Wave Tube with Helically Corrugated Waveguides. Radiophys Quantum El 65, 338–348 (2022). https://doi.org/10.1007/s11141-023-10217-3

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