A Fin Line Ferrite Isolator and Circulator for the R-Band

First approaches of a fin line Y-circulator and a fin line resonance isolator are described, and experimental data of the performance are reported. The Y-circulator consist of a antipodal fin line Y-junction with three impedance transformers and a ferrite sphere as magnetically active element. The inhomogeneous fin lin tapers are mounted in the E-plane across the center of a rectangular R-band waveguide. For the optimization of the circulator tapers various antipodal fin line contour functions are calculated and a cos2-taper is chosen. The resonance isolator in fin line technique is realized using a thin slab of ferrite which is placed in a plane of circularly polarized magnetic field in an unilateral fin line. The field distributions are discussed and first preliminary experimental results are presented.