Abstract

ABSTRACT The possibility of increasing the power output of injected-beam crossed-field devices by tapering of circuit phase velocity and beam velocity is investigated theoretically and experimentally. The hard-kernel-bunch model of the electron beam is used to derive practical circuit tapers which lead to conversion of beam kinetic energy besides the conversion of electron potential energy normally taking place in crossed-field devices. An experimental S-band crossed-field amplifier was constructed with a uniform and a tapered interdigital line and an improvement in power output between 1 and 2 dB was noted.

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