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International Journal of Antennas and Propagation
Volume 2014, Article ID 787613, 12 pages
http://dx.doi.org/10.1155/2014/787613
Research Article

Homogenization Models for a Simple Dielectric-Composite Slab upon Oblique Incidence

Department of Microwave Engineering, School of Electronics and Information Engineering, Harbin Institute of Technology, P.O. Box 3054, No. 2 Yi Kuang Street, Nan Gang District, Harbin 150080, China

Received 2 September 2013; Revised 2 December 2013; Accepted 2 December 2013; Published 2 January 2014

Academic Editor: Tat Yeo

Copyright © 2014 Jiaran Qi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Four different models are applied to effectively describe a geometrically simple dielectric-composite slab. The corresponding model parameters, when the oblique incidence is taken into account, are retrieved based on the transmission and reflection data and compensated with the nonmagnetic assumption. The scattering parameters of each model with derived parameters for various angles of incidence are then analytically calculated using the forward propagation matrix method and compared with the simulated scattering parameters from the real composite slab. According to these comparisons, it is shown that spatial dispersion makes it challenging to achieve angle-independent parameters for the applied four models. Moreover, when a stratified model is employed to describe the composite slab of our interest under oblique incidence, the boundary layers need to be anisotropic.