A method of studying transmission lines in a multilayered inhomogeneous medium in the presence of an external electromagnetic field

A new simple time-domain method for simulating the coupling between an elec tromagnetic plane wave and a planar transmission line in a multilayered inh omogeneous medium is proposed. The approach is based upon the modified tele grapher's equations, The originality of this approach comes from the fact t hat the calculation of the distributed sources takes into account the elect romagnetic field in each layer The calculation of this field in the multila yered medium is performed by, means of the physical optic concept. A finite difference time domain (FDTD) algorithm is used to solve the transmission line equations. The comparison between our results and other theoretical an d measured results validates the proposed simulation approach, II has also been demonstrated that neglecting the effect of inhomogeneous medium result s in erroneous simulations.