A five-region model for the edge-guided mode ferrite-loaded stripline isolator

A five-region model for the inhomogeneously ferrite-loaded strip/microstrip isolator with loss loading on one side of the ferrite slab is presented. A ferrite slab between two infinite perfectly conducting planes is sided by a lossy sheet and a dielectric slab. The bias magnetization is taken to be perpendicular to the ground planes. The problem is solved approximately by replacing the lossy film by suitable impedance boundary conditions.