This article is cited in 1 paper

Transparent traveling wave tubes with electron-beam modulation at the cathode

Yu. A. Kalinin, A. S. Fokin, A. V. Starodubov

Saratov State University

Abstract: We consider the results of an experimental investigation of a laboratory prototype of a microwave amplifier based on a transparent traveling wave tube (TWT) with the input signal applied either to a beam-modulating near-cathode grid or (traditional scheme) to the input helix of a slow-wave system. Dependences of the amplifier gain and efficiency on the input-power level are presented. In the TWT scheme with a modulating grid, the electron efficiency reaches 50–56% at a gain of 12–13 dB.

Received: 05.03.2014

 English version: Technical Physics Letters, 2014, 40:9, 791–792

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