By concise mathematical explanations and experimental results, a new structure of latching ferrite rectangular waveguide phase shifter is first introduced in this paper.

The results show that the figure of merit and the differential phase shift of the phase shifter are larger than these of rectangular waveguide phase shifter under the same condition.

By the aid of the phase shift-frequency characteristic, the conformal transformation and the perturbation theory, a new kind of compact, broadband waveguide phase shifter is developed.