Phase increment of magnetostatic surface waves in a ferrite film with free and metallized surfaces magnetized by a billow-type nonuniform field

The phase increment of magnetostatic surface waves (MSSWs) is calculated in ferrite-metal (FM) film structures magnetized by a billow-type nonuniform field. It is shown that the phase increment of MSSWs propagating in a guiding channel at both of whose boundaries the wave changes its direction of propagation has the same order of magnitude as the phase increment of MSSWs propagating in a ferrite-metal film structures magnetized by a linearly nonuniform field and a valley-type field. It is found that, unlike the waves propagating in a linearly nonuniform field and a valley-type field, the phase increment of waves propagating in a billow-type nonuniform field decreases when the wave frequency increases. It is demonstrated that the MSSWs propagating in ferrite-metal film structures magnetized by a billow-type nonuniform field can be used in the design of microwave phase shifters.