Accurate analysis of latching phase s.hifters

Ferrite-latching phase shifters in a generalised waveguide geometry (grooved rectangular guide with lateral ridges) are analysed using a combination of mode-matching and perturbation techniques. By this method, the double transverse inhomogeneities of the waveguide configuration and of the toroid corner magnetisation are both considered exactly, leading to accurate predictions of differential phase shift and of cutoff frequencies of higher-order modes.