TE0n mode clustered-cavity and extended interaction cavity for wideband gyro-amplifiers

Abstract

Two newly proposed gyro-device interaction circuits, the high order TEOn mode-selective clusteredcavity and extended interaction cavity, have been studied. The results of HFSS code simulation and relevant calculations show that applying these two kinds of cavities to gyroklystron and other cavity-related gyroamplifiers as interaction circuit, could broaden their operation bandwidth up to 3-8% at megawatt power level and millimeter wave frequencies. A 4-unit cluster has been employed in the design as a wideband buncher of a novel, high performance, three-stage, hybrid harmonicmultiplying gyro-amplifier. the Gptriotron. which has been fabricated and will be soon hot-tested in the Harmonic Gyrotron Lab at UMCP.