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2011-04-14

On Small-Signal Amplification in a Gyro-TWT

Natarajan Kalyanasundaram,

Prof. Natarajan Kalyanasundaram

Jaypee Institute of Information Technology University

India

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Jasmine Saini

Dr. Jasmine Saini

Jaypee Institute of Information Technology

India

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Progress In Electromagnetics Research C, Vol. 21, 75-86, 2011

doi:10.2528/PIERC11031802

Abstract

The corrected dispersion relation governing the linear interaction of a TE mode in a circular cylindrical wave guide with an annular beam of gyrating electrons in a gyro-TWT configuration is derived. The derivation of the correct dispersion relation no longer involves any integration with respect to the radial coordinate r_o. of the electron guiding center as the relevant equilibrium distribution function turns out to be independent of r_o. When the cyclotron resonance condition is satisfied by the TE mode for a positive s-number, the small-signal theory is shown to predict an initial exponential growth of the mode with interaction length over a small but finite band of frequencies around the design frequency.

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Natarajan Kalyanasundaram, and Jasmine Saini, "On Small-Signal Amplification in a Gyro-TWT," Progress In Electromagnetics Research C, Vol. 21, 75-86, 2011.
doi:10.2528/PIERC11031802

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