Abstract
The studies on a high-power microwave pulse source utilizing a superconducting cavity are described. A great amount of RF energy can be stored in a superconducting cavity by a CW solid-state oscillator with small output. The stored energy can be released within a short time to an output circuit by a switching mechanism, resulting in a high-power microwave pulse which may not be available by usual CW solid-state oscillators. Microwave pulses are extracted from the cavity by using three different kinds of switches: a mechanical and a discharge switches and superconducting thin films.