Efficient FDTD method for analysis of mushroom-structure based left-handed materials

Author

Wu, W.-Y. ; Lai, A. ; Kuo, C.-W. ; Leong, K.M.K.H. ; Itoh, T.

Author_Institution

Dept. of Electr. Eng., Nat. Sun Yat-sen Univ., Kaohsiung

Volume

1

Issue

1

fYear

2007

fDate

2/1/2007 12:00:00 AM

Firstpage

100

Lastpage

107

Abstract

A finite-difference time-domain method, combined with thin-wire and thin-slot algorithms, which is used to analyse a metamaterial based on periodic mushroom structures, is proposed. This proposed method is suitable for analysing problems involving large structures with fine structural details. Several composite right/left handed (CRLH) metamaterial mushroom-based structures are investigated. A 19 times 8 flat lens and a parabolic lens structure composed of 410 unit mushroom cells are investigated and they demonstrate negative-refractive-index characteristics while operating in the LH region. The simulation and measurement results of one- and two-dimensional CRLH mushroom-based structures are compared. The periodic analysis for mushroom structures is also introduced. Only a single unit mushroom cell is required to present the phenomena of infinite periodicity with periodic boundary conditions

Keywords

finite difference time-domain analysis; metamaterials; periodic structures; FDTD method; composite right/left handed structures; fine structural details; finite-difference time-domain method; flat lens; infinite periodicity; large structures; metarnaterial; mushroomstructure based left-handed materials; negative-refractive-index characteristics; parabolic lens; periodic analysis; periodic boundary conditions; periodic mushroom structures; thin-slot algorithms; thin-wire algorithms;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map:20050230

Filename

4126175