Low-complexity Cole-Cole expression for modelling human biological tissues in (FD) 2 TD method

It is always crucial to have an accurate human tissue model for bio-electromagnetic analysis by using the frequency-dependent finite-difference time-domain ((FD)2TD) method. A new approach is proposed that constructs a new Debye-type equation to perform the Cole-Cole dispersion in the (FD)2TD method. The proposed approach is extremely flexible and promising in representing different human tissues, and the same strategy can be applied to different frequency spectra. The proposed equation provides precise outcomes, but requires only a simple implementation. The results obtained can be found to be particularly important in analysing the interaction between electromagnetic waves and human biological tissues.