Simple large-signal modeling of klystron amplifiers

Klystron amplifiers employed in radar transmitters or linear accelerators must exhibit high pulse-to-pulse phase stability even in presence of noticeable ripple in modulator output waveform. Therefore, methods to predict large-signal phase performances are needed in klystron design techniques. The classical large-signal theory is unable to meet this requirement. In the present work a substantial improvement is developed, under the hypothesis of confined-flow guns. The resulting procedure yields saturated performance of existing tubes with good accuracy, both for gain and phase.