Design and Development of X-Band Ferrite Components

ABSTRACTThis paper describes a four-port X-band junction waveguide circulator and an X-band field displacement isolator. The circulator employs a right angled H-type junction of two X-band waveguides. A full height cylindrical post of R-4 ferrite surrounded by a full height teflon cylinder is symmetrically placed at the junction. Hitherto, no 4-port waveguide circulator using this ferrite-dielectric condiguration has been reported in the literature. This circulator has a bandwidth of more than 500 mc/s. Maximum isolation approaches 40 db. and minimum insertion loss is negligible (less than 0·2 db.). Effects of dielectric loading on the circulator performance are also presented.This paper also describes an X-band field displacement type isolator which has a bandwidth of 1·5 kMc/s. for less than 1 db. insertion loss and greater than 20 db. isolation.