Abstract :
Dual-ferrite microwave circulators, containing a high-magnetization ferrite puck surrounded by a low-magnetization ferrite toroid in the junction area, have previously been shown to provide superior wide-band performance, compared to circulators using only a single ferrite. The present paper describes a new design approach to circulators and its application to dual-ferrite circulators. In this approach the microwave ferrite in the circulator junction region is conceptionally subdivided into a series of rings, which may consist of different ferrite materials. The dc state of each ring is first calculated, and then the rf properties of each ring are determined, using the same physical model for each part of the calculation
Keywords :
design engineering; ferrite circulators; magnetic microwave devices; magnetisation; microwave circulators; circulator junction region; dc state; dual-ferrite microwave circulators; high-magnetization ferrite puck; integrated DC/RF design; low-magnetization ferrite toroid; physical model; rf properties; rings; wide-band performance; Circulators; Ferrites; Magnetic analysis; Magnetic anisotropy; Magnetic fields; Magnetic materials; Perpendicular magnetic anisotropy; Radio frequency; Saturation magnetization; Toroidal magnetic fields; Wideband;
