Adjustment of degree-2 H-plane waveguide turnstile circulator using prism resonator

The optimum configuration in the design of high quality waveguide circulators is examined. A 3.5-4.2 GHz device in WR 229 waveguide with a return loss of no less than 26 dB and an insertion loss of the order of 0.15 dB was used for the study. Preliminary measurements on a weakly magnetized turnstile junction indicates that the quality factor and the susceptance slope parameter of its complex gyrator circuit are appropriate for the design of high quality quarter wave coupled communication circulators.