Analysis of planar multilayer structures at oblique incidence using an equivalent BCITL Model

In this paper, an equivalent model based on the bi-characteristic-impedance transmission line (BCITL) is employed to model planar multilayer structures effectively for both lossless and lossy cases. In general, BCITLs are lossy, and possesses different characteristic impedances Z
^plusmn

_0b
of wave propagating in opposite directions. It should be pointed out that the CCITL is a special of the BCITL when associated losses disappear. This paper presents the PMA in brief. An equivalent model based on BCITLs is next discussed. Then, numerical results of both methods are compared. Finally, conclusions are provided.