A hybrid FDTD method for modeling complex objects with sub-cellular features

The FDTD method provided we have access to adequate computational resources, the method can quickly become unattractive for a multiscale problem, in which the computational domain size is extremely large (on the order of tens of wavelengths) and several of the features within the model are much less than the wavelength (on the order of hundredths or thousandths of a wavelength). These scenarios frequently arise when attempting to model Body Area Networks (BANs) and similar systems that create a "bottleneck" effect in Finite Methods.