High-Power Microwaves from a Nonisochronic Reflecting Electron System

Abstract

High-power microwave radiation is observed when a positive pulse is applied to an anode of a reflex triode. The frequency of radiation varies as $f\sim \frac{V^{\frac{1}{2}}}{D^n}$, where $V$ is the anode voltage, $D$ is the cathode-virtual-cathode spacing, and $0<n<~1$. The basic features of the radiation are explained by a theoretical model which predicts particle bunching as a result of the energy dependence of the electron oscillation frequency.