3D ADI-FDTD modeling of platform reduction with thin film ferromagnetic material

This work demonstrates the importance that thin-film ferromagnetic materials play in designing high-performance antennas with very low profiles. A custom, three-dimensional alternating direction implicit (ADI) FDTD model is developed, which shows the power radiated into free space from a lossless highly-magnetic thin film is 10
⁹
larger than that from a nonmagnetic one, echoing the theory developed by previous works. Furthermore, for conductive ferromagnetic materials such as FeGaB, the authors propose that by cutting the continuous thin film into stripes or by laminating it into multiple layers, the eddy current loss can be suppressed by up to 7 times.