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A fully self-consistent model for the excitation and reception ofmagnetostatic surface waves in thin ferromagnetic films by a set of coplanarantennas was developed and implemented numerically. The model assumes that theferromagnetic film is highly conducting and is interfaced with non-magneticmetallic films, but is also suitable for modeling magneto-insulating films.Perpendicular magnetic anisotropy and Dzyaloshinskii-Moriya interaction can beincluded at both interfaces of the ferromagnetic layer. The model calculatesthe coupling impedances between the different strips constituting the coplanarantennas. In some situations, this leads to a frequency non-reciprocity betweencounter-propagating waves even in the case of no asymmetry in the spin-wavedispersion relation. Several intermediate results of the model were checkednumerically and the final output of the model, given as the scatteringparameters, $S_{11}$, $S_{12}$, and $S_{21}$ of the antenna system, were ingood agreement with previous experimental studies.

Excitation and reception of magnetostatic surface spin waves in thin conducting ferromagnetic films by coplanar microwave antennas. Part I: Theory