Electromagnetic modeling for a miniaturized patch antenna with thin ferrite films

Electromagnetic modeling and simulation is performed for a miniaturized patch antenna which includes a lossy dielectric substrate and layered thin-ferrite-film superstrate above microstrip. The structure is of multiscale and multimaterial feature and the system matrix may not be well-conditioned if surface integral equations (SIEs) are used to describe the problem. This work formulates the problem by volume-surface integral equations (VSIEs) which are solved by the method of moments (MoM) with a different implementation scheme. A numerical example is presented to demonstrate the merits of the approach.