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Planar magneto‐dielectric metasubstrate for miniaturization of a microstrip patch antenna
Author(s) -
Kim Dongho
Publication year - 2012
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.27172
Subject(s) - microstrip antenna , patch antenna , miniaturization , microstrip , planar , dielectric , microwave , materials science , permittivity , homogeneous , antenna (radio) , acoustics , physics , optoelectronics , electrical engineering , optics , engineering , computer science , telecommunications , nanotechnology , computer graphics (images) , thermodynamics
A practically realizable planar‐type magneto‐dielectric metasubstrate to miniaturize a microstrip patch antenna is presented. The metasubstrate consists of two twisted metallic striplines, which provides inherently high effective permittivity (ε eff ) in a low frequency region together with strong magnetic resonance presenting high effective permeability (μ eff ) in a high frequency range. We suggest using the unusual properties of both high ε eff and μ eff of the proposed metasubstrate to reduce the overall antenna size, which has been proven to be effective in dropping an antenna resonant frequency to lower than a half of the original resonant frequency. Moreover, we have shown that a fictitious metasubstrate entirely composed of a homogeneous material filled with frequency‐dependent ε eff and μ eff also provides very similar antenna characteristics that are obtained using the fabricated inhomogeneous metasubstrate consisting of the twisted striplines. Therefore, we could confirm that the proposed metasubstrate indeed works as an effective material with high ε eff and μ eff just as we intended. Predicted results have shown good agreement with experimental data, which proves the validity of our approach. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2871–2874, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27172