Circuit analysis of Ka-band extended interaction klystron

In this article, we explained about the design of extended interaction klystron. On account of increased circuit losses at millimeter wavelength, extended interaction klystron, EIK, which consists of a slow wave structure in each single cavity, is motivated. In order to estimate the performance of an optimized circuit, Wessel-Berg´s space charge wave theory (WBA) is employed. In this procedure HFSS are directly applied to WBA. A one-dimensional disk-model simulation code, JPNDISK is also employed.