Microwaves pp 475-478 | Cite as

Analysis of the noise spectra of a drifting multi-velocity beam

  • S. Bloom
  • B. Vural


The minimum noise factor of beam-type microwave amplifiers is determined by the manner in which noise waves propagate in the low velocity region adjacent to the cathode. This multivelocity region has been analysed hitherto by means of machine integrations of the Boltzmann transport equation. In contrast, the present paper presents an analytical solution which provides closed-form expressions for the noise pow3 (r spectra (S, π, Φ) along the beam. In particular, a final steady state, that exists far downstream and in which the noise waves are washed out, is described.


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Copyright information

© N.V. Uitgeversmaatschappij Centrex 1963

Authors and Affiliations

  • S. Bloom
    • 1
  • B. Vural
    • 1
  1. 1.RCA LaboratoriesPrincetonUSA

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