Open AccessAnalysing Metamaterial Layer by Simpler Approach Based on Mode Matching Technique
Author(s) -
Kalantari Mohsen,
Paran Kian
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.0687
Subject(s) - discontinuity (linguistics) , metamaterial , eigenmode expansion , perfectly matched layer , planar , amplitude , scattering , modal analysis , transverse plane , physics , modal , optics , boundary value problem , wave propagation , waveguide , mathematical analysis , acoustics , computer science , normal mode , mathematics , engineering , materials science , structural engineering , vibration , computer graphics (images) , polymer chemistry
Analysis of metamaterial layer is carried out by a simple method in this study. In this analysis, a metamaterial element is modelled by a planar discontinuity located transversely in a transverse electromagnetic waveguide. The existence of a discontinuity in the way of a propagating wave causes scattering waves to form in the vicinity of discontinuity. With the aid of modal analysis, the scattering waves in this model are expanded into different modes propagated in this structure. To obtain the amplitude of each mode, an equation is formed and solved in a way which obviates the authors’ need for directly considering boundary conditions on both sides of discontinuity. Using this method, the amplitude of excited modes is achieved in a simpler, faster and more straightforward manner. This technique can be applied to any arbitrary‐shaped metasurface. The steps needed to derive the new relation are presented herein. Simulation results with full‐wave software, then, confirm the reasonable accuracy of the proposed method with the aid of several examples. Simulation results agree fairly well with each other.