Hasar, Ugur CemKaya, YunusKorkmaz, HuseyinIliev, Teodor2026-02-282026-02-2820252169-3536https://doi.org/10.1109/ACCESS.2025.3539558https://hdl.handle.net/20.500.12403/6064An analysis based on electromagnetic reflection and transmission properties of multilayerstructures are in general needed to get more information about their electromagnetic responses beforetheir implementation for some specific applications involving absorption, shielding, and diagnosis. Suchan analysis could be exercised by either frequency-domain or time-domain. While the former one is basedon the steady-state response, the latter one is based on the transient response which thus provides moreinformation about electromagnetic properties of multilayer structures. A procedure relying on a directtheoretical time-domain analysis is preferable to a time-domain analysis based on computational proceduressuch as the finite-time-difference-domain or the fast Fourier transform. In this study, a series presentationof transient plane wave transmission coefficient of N-layer composite structures involving bianisotropicbehavior is derived for the first time in the literature in terms of reduced transmission coefficients (the conceptofsubregion). The wave matrix approach is applied for the theoretical analysis of the reduced transmissioncoefficient after application of the concept ofsubregion. Implementation of this concept to our problem ispresented step-by-step to make a clear understanding of its application to bianisotropic multilayer structures.The derived reduced transmission coefficient is validated by different multilayer structures (differentlayer numbers, different layer lengths, and different polarizations) composed of individual layers whoseelectromagnetic responses are synthesized by the Lorentz dispersion model. Advantages and limitations ofthe derived formalism are also presentedeninfo:eu-repo/semantics/openAccessNonhomogeneous mediaReflectionTime-domain analysisElectromagneticsPermittivityTransient analysisTensorsPermeabilityMagnetic multilayersFrequency-domain analysisBianisotropic behaviorcomposite mediasubregionstransient responsetransmissionArticle13259342594510.1109/ACCESS.2025.35395582-s2.0-85217539264Q1WOS:001422050900038Q2