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High-efficiency wideband gyro-TWTs and gyro-BWOs with helically corrugated waveguides

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Radiophysics and Quantum Electronics Aims and scope

Abstract

We review the studies of gyrotron-type microwave devices whose electrodynamic system has the form of an oversized metal waveguide with a helically corrugated internal surface. For certain parameters, such a corrugation changes radically the waveguide dispersion ensuring an almost constant group velocity of the eigenmode for a small (close to zero) longitudinal wave number in a wide frequency band. The use of “helical” waveguides along with electron optical systems which form near-axis electron beams makes it possible to create high-efficiency amplifiers based on gyro-traveling-wave tubes (gyro-TWTs) with a wide instantaneous frequency band of amplification and gyro-backward-wave oscillators (gyro-BWOs) with continuous wideband tuning of the oscillation frequency. The studied devices are superior to the well-studied microwave sources of this type (gyroklystrons and gyrotrons) in frequency band, by more than an order of magnitude, and are not inferior to them in efficiency even for a wide spread of electron velocities.

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Authors and Affiliations

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

    V. L. Bratman, G. G. Denisov & S. V. Samsonov

  2. University of Strathclyde, Glasgow, UK

    A. W. Cross, A. D. R. Phelps & W. Xe

Authors
  1. V. L. Bratman
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  2. G. G. Denisov
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  3. S. V. Samsonov
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  4. A. W. Cross
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  5. A. D. R. Phelps
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  6. W. Xe
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__________

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 50, No. 2, pp. 104–117, February 2007.

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Bratman, V.L., Denisov, G.G., Samsonov, S.V. et al. High-efficiency wideband gyro-TWTs and gyro-BWOs with helically corrugated waveguides. Radiophys Quantum Electron 50, 95–107 (2007). https://doi.org/10.1007/s11141-007-0009-9

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  • DOI: https://doi.org/10.1007/s11141-007-0009-9

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