This work demonstrates the importance that thinfilm 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 lussless highly-magnetic thin film is 109 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.