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

V.L. Bratman, G.G. Denisov, S.V. Samsonov, A.W. Cross, A.D.R. Phelps, W. Xe

Research output: Contribution to journalArticle

39 Citations (Scopus)

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.
LanguageEnglish
Pages95-107
Number of pages13
JournalRadiophysics and Quantum Electronics
Volume50
Issue number2
DOIs
Publication statusPublished - 1 Feb 2007

Fingerprint

corrugated waveguides
Traveling wave tubes
traveling wave tubes
backward waves
Frequency bands
Waveguides
oscillators
broadband
Helical waveguides
waveguides
Gyrotrons
Microwave devices
Electrons
Electrodynamics
cyclotron resonance devices
microwaves
Optical systems
Amplification
Electron beams
longitudinal waves

Keywords

  • gyrotron-type microwave devices
  • electron optical systems
  • gyro-traveling-wave tubes
  • gyro-backward-wave oscillators

Cite this

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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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High-efficiency wideband gyro-TWTs and gyro-BWOs with helically corrugated waveguides. / Bratman, V.L.; Denisov, G.G.; Samsonov, S.V.; Cross, A.W.; Phelps, A.D.R.; Xe, W.

In: Radiophysics and Quantum Electronics, Vol. 50, No. 2, 01.02.2007, p. 95-107.

Research output: Contribution to journalArticle

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AU - Samsonov, S.V.

AU - Cross, A.W.

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AU - Xe, W.

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