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Effective Analysis of Terminated Lossless Planar Multilayer Periodic EBG Structures Using an Equivalent Transmission‐Line Model with Meta‐Smith Charts
Author(s) -
Torrungrueng Danai,
Sanphuang Varittha
Publication year - 2013
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.27750
Subject(s) - lossless compression , planar , transmission line , metamaterial , electrical impedance , microwave , bilinear interpolation , transformation (genetics) , smith chart , dielectric , topology (electrical circuits) , equivalent circuit , acoustics , optics , physics , computer science , impedance matching , optoelectronics , electrical engineering , engineering , algorithm , telecommunications , voltage , biochemistry , chemistry , computer graphics (images) , data compression , computer vision , gene
Lossless planar multilayer periodic electromagnetic bandgap (EBG) structures of dielectric media, illuminated by an oblique electromagnetic plane wave and terminated in a surface impedance with an arbitrary number of multilayers in a unit cell, can be effectively analyzed using an equivalent transmission‐line (TL) model based on conjugately characteristic‐impedance TLs (CCITLs). In this article, both characteristic impedances with nonnegative characteristic resistances (NNCRs) and negative characteristic resistances (NCRs) associated with CCITLs are considered. It is found that the equivalent CCITL model yields accurate results, and can simplify the analysis of these EBG structures with some physical insight. In addition, Meta‐Smith charts (MSCs) can be employed to further simplify the analysis. It is found that MSCs can provide clearer data set than the standard Smith chart with accurate results, and the bilinear transformation can be effectively used to transform dataset between MSCs and the Smith chart. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2222–2228, 2013